JPS60174355A - Sidebrake - Google Patents

Abstract

PURPOSE:To start smoothly by providing a brake force limiting mechanism on a portion of brake operating force transmission mechanism thereby blocking production of brake force higher than predetermined level even for strong operating force. CONSTITUTION:A brake force limiting mechanism 18 is provided between a joint 40 coupled to a brake system and brake cable 16. Said mechanism 18 is provided with a tubular member 39 secured to the joint 40 having a pair of elongated holes 42 facing each other while a flange section 43 is formed at the opposite end from the fixed end. A pin 45 is inserted slidably into said holes 42 where the shaft 44 is secured to said pin 45 and the cable inner 27 is bonded to said shaft 44. A spring 47 is placed while contracted between said pin 45 and flange section 43 through a washer 46. Furthermore, the cable outer 24 is fixed through a nut 50 to the bracket 49 of body. Since the spring 47 will contract against strong operational force, the braking force is limited constant.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handbrake that always applies a constant braking force, for example, when parking.

BACKGROUND ART Conventionally, handbrakes have been installed on automobiles and other mobile vehicles to prevent heavy bodies or aircraft from moving when parked. And the handbrake~
・The general structure is that the brake lever and the rear wheel braking mechanism are connected via a brake cable and an operation force transmission mechanism such as a link mechanism, and by pulling up the brake lever, the brake drum and brake shoes in the braking mechanism are connected. I'm trying to make contact with them.

The conventional purpose of installing a handbrake was to prevent the work equipment from moving during stoppage 1, so no matter how hard you pull the brake lever, it generates more wasted braking force than necessary. There was no inconvenience other than being forced to do so.

However, in the case of work equipment, in order to control forward rotation in the cylinder, a regulating mechanism is installed in the engine itself to keep the engine speed constant at all times, thereby eliminating the need for an accelerator pedal, and further eliminating the need for a brake pedal and clutch. It is conceivable to have a structure in which the pedal k is also used.

In the case of a work machine that is designed to refuse, releasing the brake pedal will engage the clutch and start the vehicle, but since the engine rotation is constant, a smooth start is not possible. Therefore, it is possible to start with the handbrake applied, but when using a conventional handbrake, the braking force is not constant, so it is not always possible to start smoothly. In some cases, it may not be possible to start the vehicle.

The present invention has been made in view of the above-mentioned points, and the present invention
The objective is to provide a handbrake that prevents the generation of braking force above a certain level even when the handbrake is operated with a strong operating force, thereby allowing a working machine, etc. to start smoothly. It is in.

In order to achieve this object, the handbrake according to the present invention includes a cylindrical body that is connected to either the brake lever side or the braking mechanism side as a part of the operating force transmission mechanism, and a cylinder body that is inserted into the cylinder body and is connected to the brake lever. a shaft connected to the other side or the braking mechanism side, a pin fixed to this shaft and whose end engages with a long hole formed in the longitudinal direction of the cylinder, and a pin between the bottle and the cylinder. Braking force limit 1 constituted by a spring compressed between a part! The gist is that the oak was built.

Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a side view of a riding lawn mower to which a handbrake according to the present invention is applied. ) is covered by the bonnet (3). The steering handle (
In addition, a cutter deck (6) with a cutter blade inside is installed on the F side of the fuselage floor (5), and the cutter blade is connected via the power transmission side 17). It is rotated by the driving force of the engine. In addition, in front of the 5 cutter deck (6), there are left and right front wheels (8) without steering wheels, and behind the left and right rear wheels (9), which are driving wheels, are f! It has all four wheels.

・On the other hand, there is a seat post section (l) at the rear of the floor (5).
O) Further, the rear fender part (11) is extended substantially horizontally to the rear, and the driver's seat (12) is provided at the upper end of the seat post part (10) by 4=j.

On the other hand, a brake pedal (13) is arranged on the front side of the fuselage floor (5), and this brake pedal (13) is connected to a braking mechanism (14) for the rear wheel (9). (13) is connected to a front flanch operation (not shown), so that the clutch is turned off by depressing the brake pedal (13).

Basically, when the brake pedal (13) is depressed, the flanch is released, and at the same time or at the same time, +1Z+F is applied to generate fljl power.

In addition, the operation Vλ (12) side slider fender part (11)
A night brake (15) is disposed on the side, and the side brake (15) and the braking mechanism (14) of No. 1111 are connected by an operating force transmission mechanism consisting of a brake cable (1B), a link (17), etc. At the same time, a braking force limiter m (18) is interposed in a part of this operating force transmission mechanism.

The structure of the handbrake (15) is as shown in Fig. 2. Several brackets (20) are placed in the n-direction within the opening 1'' of the board (19) that forms part of the aircraft body.
The rear end edge is an arcuate guide portion (20a), and a portion of the hook 11 (21) is formed at the rear of the opening. The base of the brake lever (22) is rotatable on the bracket (20) via a support shaft (P), and a spring (23) is used to tilt the brake lever (22) in the tilting direction (second direction).
The direction (in the opposite direction in the figure) is in the direction of the tide. Also no ^ board (19
) on the front end of the brake cable (1B).
24), fix it with a nut (2B), and insert the cable inch (27) inserted into the cable outer (24) into the board (19). I, 1st place 1. T) J'-(D (2B)) is passed through, and one end thereof is attached to the brake lever (22), and is attached 11- in front of the support shaft (P) of the ζ portion.

On the other hand, a grip (30) is wrapped around the outside of the cylindrical arm (29) of the brake lever (22).
A bushing rod (31) is inserted into the bushing rod (31), and a bushing button (32) is attached to the tip of the bushing rod (31).
) is attached, and this bush button (32) faces into the 11 portion (33) between the tips of the grip (30). In addition, a lock lever (34) is pivotally mounted at a position rearward of the pivot 1tib (P) at the bottom of the brake lever (22), and between this lock lever (34) and the support 11ib (P). A spring (35) is placed in tension to bias the long lever (34) in the opposite direction in the figure.Here, the lock lever (
When the lock lever (34) is released, the rotation in the Ω1 direction is caused by the hook portion (36) formed on the F portion of the lock lever (34) coming into contact with the latch II portion (21) provided on the board (19), or A part of the lock lever (34) is regulated by coming into contact with the guide part (20a) of the lock lever (20). The rear end of the bushing rod (31) is pivotally attached to the end of the lock lever (34) opposite to the hook part (36).

Furthermore, a switch (37) is attached to the bracket (20), and this switch (37) is connected to the brake lever (22).
It is turned on and off by contact movement with an operating protrusion (38) formed in a part of the body, and a buzzer or a lamp or the like is activated.

Hereinafter, from the position where the stopper part (52) of the brake lever (22) contacts the board (19), that is, the maximum forward tilt position shown by the imaginary line, the stopper part (52)
3) Rotate the brake lever (22) to the maximum rearward position where the brake lever (22) contacts the L end of the locking portion (21).

Then, as the brake lever (22) rotates, the cable inch (27) of the brake cable (18) is pulled, and the lock lever (34) is rotated counterclockwise by the tensile force of the spring (35). , and finally the hook part (3
B) is connected to Part 11 (21). Then, as the long lever (34) rotates, the lock lever (34)
The bushing button (31) pivotally attached to one end extends relative to the cylindrical arm (28), and the bushing button (31) attached to the tip of the punchrond (31) extends relative to the cylindrical arm (28).
32) protrudes from the opening at the tip of the grip (3o).

In this state, a constant braking force is generated as will be described later.

In addition, from the state shown in I-, when the bushing button (32) is pushed into the finger grip 7' (30), the bushing rod (
31) rotates the lock lever (34) clockwise to release the engaged state 11-, and the brake lever (22) falls forward due to the elastic force of the spring (23).

Then, when the brake lever (22) falls forward, the cable inch (27) is returned and the braking force is released.

By the way, when the brake lever (22) is pulled out, the operating protrusion (38) formed on a part of the brake lever (22) turns on one switch (37), so a buzzer etc. is activated. However, the driver will know that the handbrake (15) is applied.

Figure 3 is a partially cutaway view of the braking force limiting mechanism (18) provided in a part of the operating force transmission mechanism, No. 41M.
is a view in the direction of the arrow in FIG. 3, and this braking force limiter #1
(1B) connects one end of the cylinder (39) to the joint (40)
This joint (
40) to the brake 4 (formerly 14)
) is engaged with. Further, the cylindrical body (38) is formed with a pair of elongated holes (42), (42) facing the forceps, and a flange portion (43) extending outward is formed at the other end.

Furthermore, the brake cable (18) is located inside the cylinder (39).
shaft (44) connected to cable inch (27) of
is inserted, this shirt) (44) has a pin (45)
is press-fitted, and both widths of this pin (45) correspond to the long hole (42).
), protrudes outward from (42). Then, a lJ washer (4G) is applied to the pin (45), and a spring (47) is compressed between this washer (4B) and the flange portion (43) of the 41 body (39).

On the other hand, the end of the cable outer (24) has a threaded portion (48).
), this threaded portion (48) is inserted into the bracket (48), which is a rod example, and the cable outer (24) is fixed via the nuts (50), (50). Further, a washer (51) is provided at the joining portion of the shirt 1-(44) and the cable inch (27), and a spring (52) is compressed between the washer (51) and the nut (50). Then, extend the specified length from the cable outer (24) to the cable inch (
27), and also pull out the handbrake (15).
When the brake lever (22) of the brake lever (22) is tilted forward, the cable inch (27) returns without slack. In the following 1-, in order to extend or shorten the entire length of the brake cable (18) and adjust the concentration v1 error between members, turn the nuts (50) and (50). ), the position of the cable outer (24) may be changed. In addition, since the cylinder body (38) and the shaft (44) are connected via the pin (45) and the spring (47), the cable inch (27) is moved with a force stronger than the elastic force of the spring (47). Unless pulled, the cylinder body (38) and shirt 1-(44) will move as one body in the left and right direction in the figure. As shown in Figure 2, when the IC is rotated in one direction and pulled out, the
Gradually, the ability to grow one grass becomes stronger. So I went to plywood and put [/-
The spring (47) is set so that the elastic force of the spring (47) and the operating force of the brake lever (22) are balanced in the front position, which is lower than the rotation limit of the brake lever (22) to 1-force.

In this setting state, when the brake lever (22) is pulled up, since the operating force is small at the beginning of pulling up, the cylinder body (39) and shaft (40) move together and move according to the operating force. Then, when the brake lever (22) is pulled further and the operating force required for pulling it overcomes the elastic force of the spring (47), the cylinder body (39) (position #OJ, Y, shirt)
Only (44) moves. As a result, no further braking force is generated.

Therefore, if you have a riding lawn mower that does not have an engine and uses both a brake pedal and a clutch pedal, and you start off with the handbrake applied, the braking force acting on the rear wheels will always be constant. This allows for a smooth start.

In addition, in the illustrated example, the braking force is 11.1 limit orange (18)
Connect the brake cable (1B) and the rear wheel brake hole*'N (
+4), but the brake cable (1
6), or between the brake cable and the brake lever. In addition, the handbrake according to the present invention is not limited to riding lawn mowers, and can be used for various types of work.
It goes without saying that it can be applied to 1-movement skewers and the like.

As explained in 1- above, according to the idling brake according to the present invention, it is possible to prevent the later applied braking force from exceeding a certain level, so that it is possible to start with the idling brake applied. The model has IF function, and the braking a
Since no operating force beyond a certain level is applied to the members forming the tower, it is possible to prevent the members from being bent or damaged, and the life of the members can be extended.

[Brief explanation of drawings]

Fig. 1 is a side view of a riding lawn mower to which the handbrake according to the present invention is applied, Fig. 2 is a sectional view showing the internal structure of the handbrake, and Fig. 3 is a partial view of the low 1 power control 'll 441 structure. ! , IJ is cut out, and FIG.
．． The sliding mechanism (15) is! 1 side brake, (16) is blue l/-tge, -pull, (18) is braking force limiter t゛), (22) is brake 1/par, (24) is cable outer, (27) is Cable inch, (31) is a bush, (34) is a mouth, rib 1/bar, (39) is a cylinder, (42) is a long hole, (44) is a shaft, (45) is a pin, (47) is a spring. Special, X'1 applicant person tree 1. IJ Giken Rigyo Co., Ltd. - ``Wani, 7 Mountains, and Crayons (Volunteer) April 1980, 131 Limited Express RR Director, Kazuo Wakasugi, Patent Application No. 1982-29212 2, Name of Invention Site Brake 3, Supplement 11 Patent applicant (532) Tree 1 (1 Giken Jogyo Co., Ltd. 4, Agent 5, Supplementary 11 - Order 11 + 1 Spontaneous ", Mli, :, 1.', Fissure) -16, to 81..93
6. □. 1□Higaki≧゛・(1) The detailed explanation of the invention is revised as follows. From page 11, line 3 l of the specification to page 12, line 5 11, “
Moreover, with the cylinder body (39)...braking force is not generated. ” has been revised as follows. "By the way, to activate the handbrake (15), rotate the brake lever (22) upward and pull it 1.
When the cable is turned, the cable inch (27) in FIGS. 3 and 4 moves to the right and compresses the spring (47) with the pin (45). Therefore, when the brake lever (22) is in the hand position beyond the limit of rotation in one direction, the elastic force of the compressed spring (47) and the brake braking mechanism (14) are combined with plywood.
Set it so that the elastic force of the inner return spring etc. is balanced. When the brake lever (22) is pulled seven times in the setting state of refusing, at the beginning of the first pull, the pin (45) moves within the elongated hole (42) while compressing the spring (47), while , the cylinder body (38) does not move and no braking force is generated. Then, the brake lever (22) is further pulled, and the compression reaction force of the first ring (47) increases, and the cable inner (27)
The cylinder body (39) moves to the right in unison with the movement of , and the brake mechanism (14) is activated to generate a constant braking force. J

Claims (1)

[Claims] In the Cylindrical Brake, in which a brake lever and a rear wheel braking mechanism are connected via an operating force transmitting mechanism, and a braking force is generated by operating the brake lever, a part of the operating force transmitting mechanism. A cylindrical body that is attached to either the brake lever side or the braking mechanism side, a shaft that is attached to either the brake lever side or the braking mechanism side and inserted into the cylindrical body, and this shaft. a pin that is fixed to the cylindrical body and whose end is fitted into a long hole formed in the longitudinal y direction of the cylindrical body; and a spring that is compressed between the pin and a part of the cylindrical body. A handbrake featuring a power limiting mechanism.