CN201713238U - Engineering vehicle and arm-frame adjusting device thereof - Google Patents

Abstract

The utility model discloses an arm frame adjusting device, which is used for adjusting the distance between adjacent arm barrels in the arm frame of an engineering vehicle, which comprises a first arm barrel (1) and a second arm barrel (2) The slider (3) between them also includes a support assembly (4) that can move relative to the first arm barrel (1) and the second arm barrel (1), and the support assembly (4) is connected with the slide Block (3) is fixedly connected. The jib adjusting device can effectively reduce the difficulty of position adjustment between the jib tubes and improve the convenience of position adjustment, and the jib adjusting device can effectively improve the reliability of the engineering vehicle and its jib. The utility model also discloses an engineering vehicle comprising the above-mentioned boom adjusting device.

Description

Construction vehicle and its boom adjustment device

technical field

The utility model relates to the field of engineering vehicles, in particular to a boom adjusting device for engineering vehicles. In addition, the utility model also relates to an engineering vehicle comprising the above-mentioned boom adjusting device.

Background technique

With the rapid development of my country's economic construction, the market demand for engineering vehicles, especially large-tonnage engineering vehicles, is increasing day by day. Therefore, the commonly used engineering vehicles are developing toward the direction of large-scale; large-scale is an important design goal of engineering vehicles.

Taking high-altitude fire trucks or aerial work vehicles as examples, boom-type fire trucks and large-scale aerial work vehicles are equipped with fire-fighting bubbles or working platforms on the top of the boom, which can realize functions such as water spraying, rescue, and high-altitude operations. With the continuous development of the market, there is a higher demand for high-altitude operation vehicles.

When the construction vehicle needs to work, each section of the arm needs to be extended in turn; when the work needs to be transferred, each section of the arm is retracted in turn. During the above process, relative movement will occur between the arm barrels of the adjacent joint arms. To ensure the smooth relative movement, a boom adjustment device is provided between the two adjacent arm barrels.

The boom adjusting device in the prior art includes a slider formed by shims, the thickness of the slider is adjusted by increasing or decreasing the number of shims, and the distance between two adjacent arm cylinders is adjusted according to the thickness of the slider.

Taking the elevating fire truck as an example, the boom adjustment device of the telescopic arm on the elevating fire truck has the following defects:

1. The gap adjustment between adjacent arm barrels is realized by adjusting the number of shims. After the arm barrels are assembled, the thickness of the slider is fixed, and no more or less shims can be added, which makes maintenance difficult.

2. After long-term use, the slider wears out, which leads to the increase of the gap between the boom tubes, and the boom is prone to vibration during the expansion and contraction process, which affects the reliability of the engineering vehicle and its boom.

3. If the arm frame is slightly deformed and the thickness of the slider needs to be reduced, machining is required to achieve it, which is relatively difficult.

Therefore, how to improve the maintainability of the jib adjusting device and improve the reliability of the engineering vehicle and its jib is a technical problem to be solved by those skilled in the art.

Utility model content

The purpose of this utility model is to provide a boom adjustment device for engineering vehicles, the boom adjustment device can effectively reduce the difficulty of position adjustment between the arms, improve the convenience of position adjustment, and use the boom adjustment The device can effectively improve the reliability of the engineering vehicle and its boom. Another object of the present utility model is to provide an engineering vehicle comprising the above-mentioned boom adjusting device.

In order to achieve the above purpose, the utility model provides a jib adjustment device, which is used to adjust the distance between adjacent jibs in the jib of the engineering vehicle, including the first jib and the second jib that are adjacent to each other. The slider further includes a support assembly movable relative to the first arm barrel and the second arm barrel, and the support assembly is fixedly connected to the slider.

Preferably, the support assembly includes a screw matched with the first arm barrel, and the free end of the screw is fixedly connected to the slider vertically.

Preferably, the first arm barrel has a mounting seat that cooperates with the screw rod, and the extending direction of the threaded hole in the mounting seat is perpendicular to the wall direction of the corresponding second arm barrel.

Preferably, the support assembly further includes a fixing bolt penetrating through the side wall of the mounting seat, the extension direction of the fixing bolt is consistent with the radial direction of the screw rod, and the end thereof abuts against the side wall of the screw rod.

Preferably, the support assembly further includes a stopper with a blind hole, and the free end of the screw fits into the blind hole; the stopper has a first section and a first section with a diameter larger than the first section. The second section, the slider has a connection hole with an interference fit with the first section.

Preferably, it further includes a baffle arranged between the second section and the slider, the size of the baffle is equal to that of the slider, and it is fixedly connected with the first section.

The utility model also discloses an engineering vehicle, the telescopic arm frame of which includes a first arm tube and a second arm tube, and also includes the arm frame adjusting device as described in any one of the above items, the slider of the arm frame adjusting device is set between the first arm and the second arm.

Preferably, the boom adjusting device is horizontally arranged symmetrically along the vertical axis of the first boom tube.

Preferably, the boom adjusting device is arranged below the second boom barrel and supports the second boom barrel upward.

The boom adjustment device provided by the utility model is used for adjusting the distance between adjacent boom barrels in the engineering vehicle boom, including a slider arranged between the adjacent first boom barrel and the second boom barrel, and A support assembly movable relative to the first arm barrel and the second arm barrel, the support assembly is fixedly connected to the slider. When the support assembly moves relative to the first arm tube and the second arm tube, it can drive the slider fixedly connected therewith to move relative to the first arm tube and the second arm tube. Therefore, when installing the arm frame, if the gap between the slider and the first arm barrel and/or the second arm barrel is not suitable, the relative position between the support assembly and the first arm barrel and the second arm barrel can be adjusted, Make it drive the slide block, adjust the relative position of the slide block and the first arm tube and the second arm tube to reach the ideal position, and ensure that the first arm tube and the second arm tube can be extended and retracted normally.

In addition, when the slide block is worn, the gap between the first arm barrel or the second arm barrel and the slide block increases, which will cause the boom to vibrate when it is extended, which will affect the reliability of the engineering vehicle and its boom. . At this time, the support assembly drives the slider to move relative to the first arm barrel or the second arm barrel, and adjusting the gap between the slider and the first arm barrel or the second arm barrel can effectively reduce the vibration of the boom and improve the construction vehicle and The reliability of its jib.

Similarly, when the arm tube is slightly deformed and the thickness of the slider needs to be reduced, the position of the support device can also be adjusted to make the position of the slider thinner relative to the arm tube to ensure normal expansion and contraction of the boom. The boom adjustment device provided by the utility model can effectively reduce the difficulty of position adjustment between the arm barrels, improve the convenience of position adjustment, and improve the reliability of the engineering vehicle and its boom at the same time.

In a preferred embodiment, the support assembly includes a screw matched with the first arm barrel, and the free end of the screw is fixedly connected to the slider vertically. That is, the screw rod is connected to the first arm barrel, the free end of the screw rod is fixedly connected to the slider, and the relative distance between the slider and the first arm barrel is adjusted by the relative movement between the screw rod and the first arm barrel. The screw is a mature common workpiece, and it is closely matched, high in reliability and low in price, which can reduce the production cost of the boom adjustment device on the basis of meeting the requirements of the supporting components.

In another preferred embodiment, the first arm barrel has a mounting seat that cooperates with the screw rod, and the extending direction of the threaded hole in the mounting seat is perpendicular to the wall direction of the corresponding second arm barrel. The screw is installed on the first arm barrel through the mounting seat, and the direction of the screw is perpendicular to the wall direction of the second arm barrel, so that when the screw drives the slider, it can be adjusted vertically to the wall direction of the second arm barrel, so that the slider and the second arm barrel can be adjusted vertically. The two arms are parallel to better support the extension or retraction of the second arm.

On the basis of providing the above-mentioned boom adjusting device, the utility model also provides an engineering vehicle including the above-mentioned boom adjusting device; since the boom adjusting device has the above-mentioned technical effects, the engineering vehicle with the boom adjusting device also has corresponding technical effect.

Description of drawings

Fig. 1 is the structural representation of a specific embodiment of the jib and its adjustment device provided by the utility model;

Fig. 2 is a structural schematic diagram of a specific embodiment of the boom adjustment device provided by the utility model;

Fig. 3 is an exploded view of a specific embodiment of the support assembly provided by the present invention.

Detailed ways

The core of the utility model is to provide a boom adjustment device for engineering vehicles, which can effectively reduce the difficulty of position adjustment between the arm barrels, improve the convenience of position adjustment, and use the boom adjustment The device can effectively improve the reliability of the engineering vehicle and its boom. Another core of the present invention is to provide an engineering vehicle comprising the above-mentioned boom adjusting device.

The orientation words such as up, down, inside, and outside involved in this paper are defined based on the positional relationship of each component when the construction vehicle is in the transition state and the boom is in the retracted state. It should be understood that the orientation words used herein shall not limit the protection scope of this patent.

In order to enable those skilled in the art to better understand the solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Figure 1 and Figure 2, Figure 1 is a structural schematic diagram of a specific embodiment of the boom and its adjusting device provided by the utility model; Figure 2 is a structural schematic diagram of a specific embodiment of the boom adjusting device provided by the utility model .

The boom adjustment device provided by the utility model is used to adjust the distance between adjacent boom barrels in the engineering vehicle boom, including a slider arranged between the adjacent first boom barrel 1 and the second boom barrel 2 3, and a support assembly 4 that can move relative to the first arm barrel 1 and the second arm barrel 2, and the support assembly 4 is fixedly connected with the slider 3. When the support assembly 4 moves relative to the first arm barrel 1 and the second arm barrel 2 , it can drive the slider 3 fixedly connected thereto to move relative to the first arm barrel 2 and the second arm barrel 2 . Therefore, when installing the arm frame, if the gap between the slider 3 and the first arm tube 1 and/or the second arm tube 2 is not suitable, you can adjust the support assembly 4 and the first arm tube 1 and the second arm tube 2 The relative position between them, so that it can drive the slider 3, adjust the relative position of the slider 3 and the first arm barrel 1 and the second arm barrel 2, so that it can reach the ideal position, and ensure that the first arm barrel 1 and the second arm barrel The barrel 2 can be extended and retracted normally.

In addition, when the slider 3 is worn and the gap between the first arm tube 1 or the second arm tube 2 relative to the slider 3 increases, it is easy to cause the boom to vibrate when it is extended, affecting the construction vehicle and its The reliability of the jib. At this time, the support assembly 4 drives the slider 3 to move relative to the first arm barrel 1 and/or the second arm barrel 2, and the gap between the slider 3 and the first arm barrel 1 and/or the second arm barrel 2 can be adjusted. Effectively reduce the vibration of the boom and improve the reliability of the engineering vehicle and its boom.

Similarly, when the arm barrel is slightly deformed and the thickness of the slider 3 needs to be reduced, the position of the slider 3 can be thinned relative to the arm barrel by adjusting the position of the supporting device 4 to ensure normal expansion and contraction of the boom. The boom adjustment device provided by the utility model can effectively reduce the difficulty of position adjustment between the arm barrels, improve the convenience of position adjustment, and improve the reliability of the engineering vehicle and its boom at the same time.

In a specific embodiment, the supporting assembly 4 includes a screw rod 41 matched with the first arm barrel 1 , and the free end of the screw rod 41 is fixedly connected with the slider 3 vertically. That is, the screw rod 41 is connected to the first arm tube 1, and the free end of the screw rod 41 is fixedly connected to the slider 3. Through the relative movement between the screw rod 41 and the first arm tube 1, the distance between the slider 3 and the first arm tube 1 is adjusted. relative distance. The screw is a mature and commonly used workpiece. It not only fits tightly, but also has high connection reliability, and is cheap. On the basis of meeting the requirements of the support component 4, the production cost of the boom adjustment device can be reduced.

Obviously, the support assembly 4 can also be of other structures. For example, a shaft sleeve may be provided on the first arm cylinder 1, the support assembly 4 is a pin shaft, and the slider 3 is fixedly connected to the end of the pin shaft. The pin shaft can move in the shaft sleeve, and the shaft sleeve is provided with an oblong hole along its axial direction, and the pin shaft is fixed in the shaft sleeve by a screw rod consistent with the radial direction of the pin shaft or a fixed shaft penetrating the pin shaft. And release it when the relative position needs to be adjusted. Such a structure can also meet the needs of the utility model.

In a preferred embodiment, the first arm barrel 1 has a mounting seat 11 that cooperates with the screw rod 41 , and the extending direction of the threaded hole in the mounting seat 11 is perpendicular to the wall direction of the corresponding second arm barrel 2 . The screw rod 41 is installed on the first arm barrel 1 through the mounting seat 11, and the direction of the screw rod 41 is perpendicular to the wall direction of the second arm barrel 2, so that the screw rod 41 can be vertical to the barrel wall of the second arm barrel 2 when driving the slider 3 The direction is adjusted so that the slider 3 is parallel to the second arm barrel 2, so as to better support the extension or retraction of the second arm barrel 2.

The support assembly 4 mentioned above may further include a fixing bolt 42 penetrating through the side wall of the mounting seat 11 , the extending direction of the fixing bolt is consistent with the radial direction of the screw rod 41 , and the end thereof abuts against the side wall of the screw rod 41 . That is, after the slider 3 reaches the ideal working position, the relative position of the mounting seat 11 and the screw rod 41 can be fixed by the fixing bolt 41, so that the position of the slider 3 is firmer and the boom structure is more reliable.

Further improvements can be made to the above-mentioned boom adjusting device.

Please refer to FIG. 3 , which is an exploded view of a specific embodiment of the support assembly provided by the present invention.

The slide block 3 is generally formed of a wear-resistant nylon material. In order to prevent the screw rod 41 from entering the slide block 3 too deeply, a stopper 43 can be set at the free end of the screw rod 41. The stopper member 43 has a blind hole for accommodating the free end of the screw rod 41. Apparently, the hardness of the limiting component 43 is greater than that of the slider, and can be made of metal. The free end of the screw rod 41 cooperates with the blind hole, which can effectively prevent the free end of the screw rod 41 from entering the slider 3 too deeply, and improve the reliability of the boom adjusting device.

Meanwhile, the limiting component 43 may have a first section 431 and a second section 432, and the diameter of the second section 432 is larger than that of the first section 431, forming a stepped shape. The slider 3 has a connecting hole 31 with an interference fit with the first section 431, so that the first section 431 is fixedly connected with the slider 3, and the second section 432 limits the depth of the screw 41 entering the slider 2, so that the screw 41 and the slider 3 are connected to each other. The slider 3 connection is more reliable.

In a further technical solution, a baffle 44 can also be set between the second section 432 and the slider 3, and the size of the baffle 44 can be greater than or equal to the size of the slider 3, and the baffle 44 and the first section 431 Fixed connection. The baffle plate 44 can be made of a material whose hardness is greater than that of the slider 3 , so that when the slider 3 rubs against the second boom 2 , its strength and hardness are guaranteed.

In addition to the above-mentioned boom adjusting device, the utility model also provides an engineering vehicle including the above-mentioned boom adjusting device, the telescopic boom of the engineering vehicle includes a first arm tube 1 and a second arm tube 2, the sliding arm of the boom adjusting device The block 3 is arranged between the first arm tube 1 and the second arm tube 2 . For the structure of other parts of the construction vehicle, please refer to the prior art, which will not be repeated here.

Specifically, the above-mentioned engineering vehicle may be a machine with a telescopic boom, such as an elevating fire truck, an aerial work vehicle, or the like.

In a specific embodiment, the jib adjusting device may be horizontally arranged symmetrically along the vertical axis of the first jib barrel 1 . That is, on both sides of the axis of the second jib 2, the second jib 2 is horizontally and symmetrically clamped together, so that the second jib 2 can receive a force stably, and jointly prevent the second jib 2 from sideways.

Further, the jib adjusting device may be arranged below the second arm barrel 2 to support the second arm barrel 2 upward. As shown in Figure 1, two boom adjustment devices can be symmetrically arranged on the lower side of the first arm barrel 1 along the vertical axis, so that the two boom adjustment devices can jointly support the second arm barrel 2 upwards, preventing the second arm barrel 2 from The arm tube 2 is bent and deformed to the lower side under the influence of gravity during use.

Apparently, there can be one boom adjusting device arranged below the second arm barrel 2, which is arranged on the vertical axis of the second arm barrel 2; Both support the second arm cylinder 2 upwards, so that the structure of the arm frame is more reliable, and the possibility of trembling when extending or retracting is less.

It should be noted that only the first boom 1 and the second boom 2 are mentioned herein, which means that the boom of the engineering vehicle includes but is not limited to two booms. The engineering vehicle provided by the utility model can include multiple The section boom, and among any two adjacent sections, one is the first boom 1 and the other is the second boom 2. At the same time, in the embodiments given in the accompanying drawings of this specification, the support assembly 4 is installed on the first arm barrel 1, the second arm barrel 2 is sleeved inside the first arm barrel 1, and the support assembly 4 is formed by the first arm barrel 1. The outside of the arm tube 1 protrudes into the inside of the first arm tube 2 . Obviously, if the support assembly 4 protrudes outward from the inside of the second arm barrel 2 in the above structure, the slider is still between the first arm barrel 1 and the second arm barrel 2, such a structure can also meet the requirements of the present utility model. Require. Therefore, the first arm tube 1 and the second arm tube 2 are a general and relative concept, which should not be limited by the drawings in this specification.

The engineering vehicle and its boom adjusting device provided by the utility model have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (9)

1. A boom adjusting device, which is used to adjust the distance between adjacent boom barrels in the engineering vehicle boom, comprising a first boom barrel (1) and a second boom barrel (2) adjacent to each other The slider (3) is characterized in that it also includes a support assembly (4) that can move relative to the first arm barrel (1) and the second arm barrel (1), and the support assembly (4) is connected to the Slide block (3) is fixedly connected. 2. The boom adjustment device according to claim 1, characterized in that, the support assembly (4) includes a screw (41) matched with the first arm barrel (1), and the screw (41) The free end is fixedly connected with the slider (3) vertically. 3. The jib adjusting device according to claim 2, characterized in that, the first arm cylinder (1) has a mounting seat (11) matched with the screw rod (41), and in the mounting seat (11) The extending direction of the threaded hole is perpendicular to the wall direction of the second arm tube (2) corresponding to it. 4. The boom adjusting device according to claim 3, characterized in that, the support assembly (4) further comprises a fixing bolt (42) penetrating through the side wall of the mounting seat (11), and the fixing bolt (42) ) is consistent with the radial direction of the screw (41), and its end is against the side wall of the screw (41). 5. The boom adjustment device according to any one of claims 2 to 4, characterized in that, the support assembly (4) further comprises a stopper (43) with a blind hole, and the screw (41) The free end matches the blind hole; the stopper (43) has a first section (431) and a second section (432) with a diameter larger than the first section (431), and the slider (3 ) has a connection hole (31) with an interference fit with the first section (431). 6. The boom adjusting device according to claim 5, characterized in that it further comprises a baffle (44) arranged between the second section (432) and the slider (3), the baffle (44) is equal in size to the slider (3), and is fixedly connected to the first segment (431). 7. An engineering vehicle, its telescopic boom comprises a first boom (1) and a second boom (2), characterized in that it also includes the boom adjusting device as claimed in any one of claims 1 to 6 , the slider (3) of the boom adjusting device is arranged between the first arm barrel (1) and the second arm barrel (2). 8. The engineering vehicle according to claim 7, characterized in that, the boom adjusting device is horizontally arranged symmetrically along the vertical axis of the first boom tube (1). 9. The engineering vehicle according to claim 8, characterized in that, the jib adjusting device is arranged below the second jib (2) and supports the second jib (2) upward.

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