CN111115519B - An adjustable armrest seat for a stand-up electric forklift - Google Patents

Abstract

The present invention relates to the technical field of hand brakes for stand-on forklifts, and specifically to an adjustable armrest seat for stand-on electric forklifts. It includes a guide column with a flange at the lower end, a pipe column base, a height adjustment mechanism and an angle adjustment mechanism. The height adjustment mechanism includes a locking guide sleeve and an unlocking handle. The locking guide sleeve includes an inner guide sleeve and an outer guide sleeve that are sheathed together. The inner guide sleeve and the guide column are axially slidably matched. An inclined surface is provided on the inner side wall of the outer guide sleeve. The inclined surface and the corresponding inner guide sleeve side wall are elastically contacted by a steel ball and locked by a locking spring to achieve locking and positioning of the inner guide sleeve and the guide column; the unlocking handle includes a pair of connecting rods and a handle connected to the upper ends of the pair of connecting rods. The angle adjustment mechanism includes a screw, a rectangular support plate and a connecting plate. A nut with a pin hole is installed on the screw. One end of the connecting plate is connected to the nut pin shaft, and the other end is connected to the pipe column base pin shaft. The armrest seat of the present invention is fixedly installed on the forklift, and the height and angle of the armrest can be infinitely adjusted.

Description

An adjustable armrest seat for a stand-up electric forklift

Technical Field

The invention relates to the technical field of hand brakes of a stand-up forklift, and in particular to an adjustable armrest seat of a stand-up electric forklift.

Background Art

The right side of a stand-on electric forklift is usually equipped with an armrest to support the operator's arm, so as to facilitate the operation and control of each action of the forklift. At present, most stand-on electric forklifts do not have adjustable armrests, and the armrests equipped at the operating position are fixed. The height of the armrest is designed based on the average height, which does not conform to the design principles of ergonomics and is not user-friendly. It is difficult to meet the needs of operators with different heights and operating habits.

Summary of the invention

In view of the shortcomings of the prior art, the present invention provides an adjustable armrest seat for a stand-up electric forklift, which overcomes the shortcomings of the background technology and can infinitely adjust the height and angle of the armrest. The specific technical solution is as follows:

An adjustable armrest seat for a stand-up electric forklift, comprising a guide column 1 with a flange at the lower end, a column base mechanism 3, a height adjustment mechanism and an angle adjustment mechanism;

A compression spring 15 is provided inside the guide column 1;

The pipe column base mechanism 3 comprises an upright pipe column 301 with a flange at the lower end;

The height adjustment mechanism comprises a locking guide sleeve mechanism 2 and an unlocking mechanism 5;

The locking guide sleeve mechanism 2 comprises an inner guide sleeve 203 and an outer guide sleeve 201 which are sleeved together;

The inner guide sleeve 203 and the pipe column 301 are sequentially sleeved on the guide column 1 from bottom to top, and the inner guide sleeve 203 and the pipe column 301 can slide synchronously along the axial direction of the guide column 1;

The truncated cone-shaped port at the lower end of the outer guide sleeve 201 and the side wall of the inner guide sleeve are in elastic contact through the steel ball 206 and locked by the locking spring 205, so as to realize the locking and positioning of the inner guide sleeve 203 and the guide column 1;

The unlocking mechanism comprises a pair of connecting rods 501 symmetrically arranged on opposite sides of the pipe column 301, the upper ends of the pair of connecting rods 501 are movably connected to the side walls of the pipe column 301, and the lower ends of the pair of connecting rods 501 are respectively fixedly connected to the outer guide sleeve 201;

The angle adjustment mechanism includes a rectangular support plate 6, a screw rod 10 and a connecting plate 13;

The support plate 6 is horizontally located at the upper end of the pipe column 301, and both sides of the support plate 6 and the side walls of the pipe column 301 are connected via wall pins 7;

The screw rod 10 is arranged along the length direction of the support plate 6 and is fixedly installed by the bearing seat 9 and the support plate 6. A nut 11 with a pin hole is installed on the screw rod 10.

One end of the connecting plate 13 is connected to the nut 11 via a pin, and the other end is hinged to the outer wall of the pipe column 301;

During operation, a pair of connecting rods 501 are pulled downward to drive the outer guide sleeve 201 to move upward, and the clamping force between the inner guide sleeve 203 and the corresponding guide column 1 is eliminated, so that the inner guide sleeve 203 can move axially along the guide column 1 to adjust the height of the armrest seat; the screw rod 10 is rotated to adjust the position of the nut 11, and the support plate 6 is rotated under the drive of the connecting plate 13 to achieve the angle adjustment of the armrest seat.

Furthermore, the outer cylindrical surface of the inner guide sleeve 203 is stepped, and the upper diameter is larger than the lower diameter;

The outer guide sleeve 201 is a pipe sleeve with three-level stepped holes, the diameter of which decreases from top to bottom, namely the upper part, the middle part and the lower part, and the lower port of the lower part is a truncated cone-shaped port;

The upper part of the inner guide sleeve 203 cooperates with the upper part of the outer guide sleeve 201, so that the inner guide sleeve 203 and the outer guide sleeve 201 are sheathed together;

The lower part of the inner guide sleeve 203 is sleeved with a locking spring 205 , the upper end of the locking spring 205 abuts against the step of the inner guide sleeve 203 , and the lower end abuts against the lower step of the outer guide sleeve 201 .

Furthermore, through holes are evenly opened on the side wall of the lower part of the inner guide sleeve 203 along the same circumference, and a steel ball 206 is arranged in the through hole, so that the steel ball 206 and the lower lower port of the outer guide sleeve 201 are in elastic contact and locked in position by a locking spring 205; when the outer guide sleeve 201 moves upward along the guide column 1, the clamping force of the lower lower port of the outer guide sleeve 201 on the steel ball 206 is eliminated, thereby releasing the locking position of the inner guide sleeve 203 and the guide column 1.

Furthermore, a radial positioning pin 202 is provided on the inner wall of the inner guide sleeve 203 , and an axial keyway is provided on the outer wall of the guide column 1 . The positioning pin 202 cooperates with the keyway to enable the inner guide sleeve 203 to slide in an axial positioning manner along the guide column 1 .

Furthermore, a pair of support plates 303 are fixedly provided on the side walls of the pipe column 301 corresponding to the two sides of the support plate 6, and the pair of support plates 303 and the two sides of the support plate 6 are respectively connected by wall pins 7;

The side walls of the pipe column 301 are provided with a connecting plate 305 and a pin plate 302 at the two ends corresponding to the support plate 6, and the connecting plate 305 and the corresponding ends of the connecting plate 13 are connected by a pin.

The upper ends of the pair of connecting rods 501 are respectively provided with shaft sleeves 502, so that the upper ends of the pair of connecting rods 501 are connected to the pin plate 302 through the cooperation of the shaft sleeves 502 and the pins;

A pair of connecting rod mounting plates 204 are fixedly provided on the side wall of the outer guide sleeve 201 , so that the lower ends of the pair of connecting rods 501 are fixedly connected to the outer guide sleeve 201 through the corresponding pair of connecting rod mounting plates 204 .

Furthermore, the wall pin shaft 7 comprises a cam-shaped wall plate and a short shaft, wherein the short shaft is arranged on the wide portion of the wall plate, and the narrow portion of the wall plate is fixedly connected to the vertical plates on both sides of the support plate 6.

Furthermore, an upper cover plate 304 is fixedly provided on the upper end of the pipe column 301 , and the upper end of the compression spring 15 in the guide column 1 is in contact with the upper cover plate 304 .

The beneficial technical effects of the present invention are as follows:

1. When the adjustable armrest seat of the present invention is infinitely adjusted in height, one hand gently presses the support plate, and the other hand presses the handle. The handle rotates clockwise around the center of the pin shaft, and a pair of connecting rods are lifted to drive the outer guide sleeve to move upward. The steel ball loses the squeezing of the truncated cone-shaped lower port of the outer guide sleeve. At this time, the inner guide sleeve can move up and down along the guide column to carry out infinitely adjusted height. The height adjustment range is 0~110mm. Then put down the handle, and the spring force generated by the locking spring presses the outer guide sleeve downward. The inclined surface of the outer guide sleeve acts on the steel ball, which tightly clamps the steel ball on the guide column, so as to maintain the height position of the locking guide sleeve and the upper support plate;

When the angle is infinitely adjusted, rotating the screw causes the nut to move along the screw, driving the support plate to rotate, thereby realizing infinite adjustment of the support plate angle, and the angle adjustment range is 0~20°; the height and angle of the armrest seat can be infinitely adjusted to meet the needs of drivers of different heights to support their arms when controlling the forklift movement, which is in line with the design principles of ergonomics.

2. With the adjustable armrest seat of the present invention, the driver can freely adjust the height and angle of the armrest base according to his own operating habits, so that the design can better meet the personalized and humanized use needs. It can meet the requirements of supporting the operator's arms when people of different heights (160cm-195cm) in Asia, Europe and the United States stand and drive forklifts, effectively improving the driving comfort.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is an axonometric view of an armrest seat of the present invention.

FIG. 2 is a front view of the armrest seat of the present invention.

FIG3 is a sectional right side view of FIG2 .

FIG. 4 is an axonometric view of the locking guide sleeve mechanism.

FIG. 5 is a front view of the locking guide sleeve mechanism.

FIG. 6 is a left side view of the locking guide sleeve mechanism.

FIG. 7 is an isometric view of the pipe column base mechanism.

FIG. 8 is an isometric view of the unlocking mechanism.

Figure 9 is an axonometric view of a wall pin.

Among them: 1 guide column, 2 locking guide sleeve mechanism, 3 pipe column base mechanism, 4 first pin shaft, 5 unlocking mechanism, 6 support plate, 7 wall pin shaft, 8 fourth pin shaft, 9 bearing seat, 10 screw rod, 11 nut, 12 third pin shaft, 13 connecting plate, 14 locking nut, 15 compression spring, 201 outer guide sleeve, 202 positioning pin, 203 inner guide sleeve, 204 a pair of connecting rod mounting plates, 205 locking spring, 206 steel ball, 301 pipe column, 302 pin shaft plate, 303 a pair of support plates, 304 upper cover plate, 305 connecting plate, 501 a pair of connecting rods, 502 sleeve, 503 handle.

DETAILED DESCRIPTION

To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not intended to limit the present invention.

Example

See Figure 1, an adjustable armrest seat of a stand-on electric forklift includes a guide column 1 with a flange at the lower end, a column base mechanism 3, an angle adjustment mechanism and a height adjustment mechanism.

The guide column 1 is provided with a compression spring 15, and the pipe column base mechanism 3 includes a pipe column 301 with a flange at the lower end.

The height adjustment mechanism comprises a locking guide sleeve mechanism 2 and an unlocking mechanism 5 .

The locking guide sleeve mechanism 2 includes an inner guide sleeve 203 and an outer guide sleeve 201 which are sleeved together. The inner guide sleeve 203 and the pipe column 301 are sleeved on the guide column 1 in sequence from bottom to top, and the inner guide sleeve 203 and the pipe column 301 can slide synchronously along the axial direction of the guide column 1.

As shown in FIG2 , the angle adjustment mechanism includes a screw 10, a rectangular support plate 6 and a connecting plate 13. The support plate 6 is horizontally located at the upper end of the pipe column 301 and is connected to the side wall of the pipe column 301 through a wall pin 7.

The screw rod 10 is arranged along the length direction of the support plate 6 and is fixedly installed by the bearing seat 9 and the support plate 6. A nut 11 with a pin hole is installed on the screw rod 10.

One end of the connecting plate 13 is connected to the nut 11 via a third pin 12 , and the other end is connected to the column base mechanism 3 via a fourth pin 8 .

As shown in FIG3 , the lower port of the outer guide sleeve 201 is a truncated cone-shaped port, and the lower port and the corresponding inner guide sleeve side wall are in elastic contact through a steel ball 206 and locked by a locking spring 205, so as to realize the locking and positioning of the inner guide sleeve 203 and the guide column 1;

As shown in FIG4 and FIG5 , the outer cylindrical surface of the inner guide sleeve 203 is stepped, and the diameter of the upper portion is larger than the diameter of the lower portion;

The outer guide sleeve 201 is a pipe sleeve with three-level stepped holes, and the diameter decreases from top to bottom, namely the upper part, the middle part and the lower part, and the lower port of the lower part is a truncated cone-shaped port.

The upper portion of the outer guide sleeve 201 cooperates with the upper portion of the inner guide sleeve 203 so that the inner guide sleeve 203 and the outer guide sleeve 201 are sleeved together.

The lower part of the inner guide sleeve 203 is sleeved with a locking spring 205 , the upper end of the locking spring 205 abuts against the step of the inner guide sleeve 203 , and the lower end abuts against the lower step of the outer guide sleeve 201 .

The side wall of the lower part of the inner guide sleeve 203 is evenly provided with through holes along the same circumference, and a steel ball 206 is matched in the through hole so that the steel ball 206 and the lower end of the outer guide sleeve 201 are in elastic contact and locked in place by a locking spring 205;

When the outer guide sleeve 201 moves upward along the guide column 1, the pressing force of the lower end of the outer guide sleeve 201 on the steel ball 206 is eliminated, thereby releasing the locking and positioning of the inner guide sleeve 203 and the guide column 1. At the same time, a retaining ring 207 is provided on the inner guide sleeve 203 corresponding to the lower part of the steel ball 206 to prevent the steel ball 206 from sliding down from below.

A pair of connecting rod mounting plates 204 with vertical holes are provided on the outer side wall of the outer guide sleeve 201 corresponding to both sides of the support plate 6. The lower ends of the pair of connecting rods 501 are vertically inserted into the pair of connecting rod mounting plates 204 and are locked and fixed up and down by locking nuts 14.

As shown in FIG. 6 , a radial positioning pin 202 is disposed on the inner wall of the inner guide sleeve 203 , and an axial keyway is disposed on the outer wall of the guide column 1 . The positioning pin 202 cooperates with the keyway to enable the inner guide sleeve 203 to slide along the axial direction of the guide column 1 .

As shown in FIG. 7 , a pair of support plates 303 are fixedly provided on the side walls of the pipe column 301 corresponding to the two sides of the support plate 6, and the pair of support plates 303 and the two sides of the support plate 6 are respectively connected by wall pins 7;

The side wall of the pipe column 301 is provided with a connecting plate 305 and a pin plate 302 at both ends corresponding to the support plate 6, and the connecting plate 305 and the corresponding ends of the connecting plate 13 are connected by a fourth pin 8;

An upper cover plate 304 is fixedly provided at the upper end of the pipe column 301, and the pipe column 301 is sleeved on the guide column 1, so that the inner cavity of the pipe column 301 and the inner cavity of the guide column 1 are coaxial to form a height-adjustable vertical cavity, and a compression spring 15 is provided in the vertical cavity to facilitate the upward adjustment of the support plate 6 when adjusting the height of the armrest seat.

As shown in FIG8 , the unlocking mechanism 5 includes a pair of connecting rods 501 and a handle 503 connected to the pair of connecting rods 501. The handle 503 is in the shape of a horizontal plate. The pair of connecting rods 501 are arranged symmetrically in a mirror direction. The pair of connecting rods 501 are respectively provided with shaft sleeves 502, so that the upper ends of the pair of connecting rods 501 are connected to the pin plate 302 through the cooperation of the shaft sleeves 502 and the first pin 4.

A pair of connecting rod mounting plates 204 are fixedly provided on the side wall of the outer guide sleeve 201 , so that the lower ends of the pair of connecting rods 501 are fixedly connected to the outer guide sleeve 201 through the corresponding pair of connecting rod mounting plates 204 .

The first pin 4 , the third pin 12 and the fourth pin 8 are all standardized fasteners.

See Figure 9. The wall pin shaft 2 includes a cam-shaped wall plate and a short shaft. The narrow part of the wall plate is fixedly connected to the vertical plate of the support plate 6. The short shaft is fixedly arranged on the wide part of the wall plate. The short shaft is inserted into the corresponding vertical plate and support plate of the support plate 6, so that the support plate 6 and the column base mechanism 3 are pin-connected.

During operation, the handle 503 is pushed downward, and the outer guide sleeve 201 moves upward along the guide column 1. At this time, the clamping force between the inner guide sleeve 203 and the corresponding guide column 1 is eliminated, and the inner guide sleeve 203 can move up and down along the guide column 1 to adjust the height of the armrest seat infinitely; the screw handle at the end of the screw rod 10 is turned, and the nut 11 moves on the screw rod 10. Under the action of the connecting plate 13, the support plate 6 rotates around the wall pin shaft 7 to realize the infinite adjustment of the angle of the armrest seat.

Therefore, the flange at the lower end of the guide column 1 on the armrest seat of the present invention is fixedly connected to the corresponding part of the forklift, so that the armrest seat of the present invention is fixedly installed on the forklift, and the height and angle of the armrest can be infinitely adjusted, which is convenient for the operation and control of various actions of the forklift, and can also meet the use needs of operators with different heights and operating habits.

It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. An adjustable handrail seat of a stand-up electric forklift, which is characterized in that: comprises a guide post (1) with a flange at the lower end, a pipe column base mechanism (3), a height adjusting mechanism and an angle adjusting mechanism;

a compression spring (15) is arranged in the guide post (1);

the pipe column base mechanism (3) comprises an upright pipe column (301) with a flange plate at the lower end;

The height adjusting mechanism comprises a locking guide sleeve mechanism (2) and an unlocking mechanism (5);

the locking guide sleeve mechanism (2) comprises an inner guide sleeve (203) and an outer guide sleeve (201) which are sleeved together;

the inner guide sleeve (203) and the tubular column (301) are sequentially sleeved on the guide column (1) from bottom to top, and the inner guide sleeve (203) and the tubular column (301) can synchronously slide along the axial direction of the guide column (1);

The lower end of the outer guide sleeve (201) is elastically contacted with the side wall of the inner guide sleeve through a steel ball (206) and locked through a locking spring (205), so that the locking and positioning of the inner guide sleeve (203) and the guide pillar (1) are realized;

the unlocking mechanism comprises a pair of connecting rods (501) symmetrically arranged on two opposite sides of the tubular column (301), the upper ends of the connecting rods (501) are movably connected with the side wall of the tubular column (301), and the lower ends of the connecting rods (501) are fixedly connected with the outer guide sleeve (201) respectively;

The angle adjusting mechanism comprises a rectangular support plate (6), a screw (10) and a connecting plate (13);

the support plate (6) is horizontally positioned at the upper end of the pipe column (301), and two sides of the support plate (6) are connected with the side wall of the pipe column (301) through a pin shaft (7) with a wall respectively;

the screw (10) is arranged along the length direction of the support plate (6) and is fixedly installed through the bearing seat (9) and the support plate (6), and a nut (11) with a pin hole is matched and installed on the screw (10);

one end of the connecting plate (13) is connected with the nut (11) through a pin shaft, and the other end of the connecting plate is hinged on the outer side wall of the pipe column (301);

When the device works, a pair of connecting rods (501) are pulled downwards to drive the outer guide sleeve (201) to move upwards, the compression force between the inner guide sleeve (203) and the corresponding guide post (1) is eliminated, and the inner guide sleeve (203) can move along the axial direction of the guide post (1) to adjust the height of the armrest seat; the screw (10) is rotated, the position of the nut (11) is adjusted, and the support plate (6) is driven by the connecting plate (13) to rotate, so that the angle adjustment of the armrest seat is realized;

The outer cylindrical surface of the inner guide sleeve (203) is stepped, and the diameter of the upper part is larger than that of the lower part;

The outer guide sleeve (201) is a sleeve with three-stage stepped holes, the pipe diameters of the sleeve are sequentially reduced from top to bottom, the sleeve is respectively an upper part, a middle part and a lower part, and the lower port of the lower part is a truncated cone-shaped port;

the upper part of the inner guide sleeve (203) is matched with the upper part of the outer guide sleeve (201), so that the inner guide sleeve (203) and the outer guide sleeve (201) are sleeved together;

The lower part of the inner guide sleeve (203) is sleeved with a locking spring (205), the upper end of the locking spring (205) is abutted on a step of the inner guide sleeve (203), and the lower end of the locking spring is abutted on a lower step of the outer guide sleeve (201);

Through holes are uniformly formed in the side wall of the lower part of the inner guide sleeve (203) along the same circumference, steel balls (206) are matched in the through holes, so that the steel balls (206) are elastically contacted with the lower port of the lower part of the outer guide sleeve (201) and locked and positioned through locking springs (205);

when the outer guide sleeve (201) moves upwards along the guide post (1), the pressing force of the lower port of the lower part of the outer guide sleeve (201) on the steel ball (206) is eliminated, so that the locking and positioning of the inner guide sleeve (203) and the guide post (1) are relieved;

The inner guide sleeve (203) is provided with a radial positioning pin (202) on the inner side wall, the outer side wall of the guide post (1) is provided with an axial key slot, and the positioning pin (202) and the key slot are matched to enable the inner guide sleeve (203) to slide along the axial positioning of the guide post (1).

2. The adjustable armrest mount for a stand-alone electric forklift as recited in claim 1, wherein: a pair of support plates (303) are fixedly arranged on the side wall of the tubular column (301) corresponding to the two sides of the support plate (6), and the two sides of the support plates (303) and the two sides of the support plate (6) are respectively connected through a hinge pin (7) with a wall;

The two ends, corresponding to the support plate (6), of the side wall of the pipe column (301) are respectively provided with a connecting plate (305) and a pin shaft plate (302), and the corresponding ends of the connecting plate (305) and the connecting plate (13) are connected through pin shafts;

The upper ends of the pair of connecting rods (501) are respectively provided with a shaft sleeve (502), so that the upper ends of the pair of connecting rods (501) are connected with the pin shaft plate (302) through the matching of the shaft sleeves (502) and the pin shafts;

A pair of connecting rod mounting plates (204) are fixedly arranged on the side wall of the outer guide sleeve (201), so that the lower ends of the connecting rods (501) are fixedly connected with the outer guide sleeve (201) through the corresponding pair of connecting rod mounting plates (204).

3. The adjustable armrest mount for a stand-alone electric forklift as recited in claim 1, wherein: the walled pin shaft (7) comprises a cam-shaped wall plate and a short shaft, the short shaft is arranged on the wide portion of the wall plate, and the narrow portion of the wall plate is fixedly connected with the vertical plates on two sides of the support plate (6).

4. The adjustable armrest mount for a stand-alone electric forklift as recited in claim 1, wherein: an upper cover plate (304) is fixedly arranged at the upper port of the tubular column (301), and the upper end of the compression spring (15) in the guide column (1) is contacted with the upper cover plate (304).