Height valve fixing device for subway

Abstract

The height valve fixing device comprises an upper thin column and a lower connecting pipe, the upper thin column is arranged to be a cylinder, external threads are arranged on the lower portion of the upper thin column, the lower connecting pipe is arranged to be a cylinder, a cylindrical notch is formed in the upper portion of the lower connecting pipe, and internal threads are arranged on the inner wall of the cylindrical notch. The upper thin column and the lower connecting pipe are in threaded connection at the positions of the external connection threads and the internal connection threads, the top of the upper thin column and the bottom of the lower connecting pipe are each provided with a pawl, the pawls are U-shaped, the two sides of the front face of each pawl are each provided with a suction cup, and the width of the bottom face of each pawl is larger than the diameter of the upper thin column and the diameter of the lower connecting pipe. The length of the device is successfully and flexibly adjusted according to the length of the connecting rod, the distance between the upper connecting rod head and the lower connecting rod head is fixed, the precision of the height valve is improved, the stability during pawl fixing is further improved through the arrangement of the suction cup, and the operation efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of subway maintenance auxiliary workpieces, in particular to a height valve fixing device for subways. Background Art

[0002] At present, air springs are mostly used in the secondary suspension devices of subway trains. During use, the air springs sense load changes through height valves and then fill and exhaust the air springs, thereby ensuring that the height value of the vehicle body under different loads remains basically unchanged. During the high-level maintenance of vehicles, eight-point weighing is the process of quality verification of vehicle quality, axle weight and wheel weight during maintenance of urban rail vehicles. The purpose is to restore the basic technical performance of the vehicle and make the performance of the vehicle after maintenance close to the level of new vehicles.

[0003] The eight-point weighing of a single vehicle generally takes five to eight hours. After the weighing test is passed, the connecting rod in the height valve needs to be tightened. Figure 5 As shown, the height valve includes two height valve connecting rods, connecting rod heads connected by a ball joint, connecting rods threadedly connected between the connecting rod heads, and fastening bolts threadedly connected on the connecting rods. When the distance between the upper and lower connecting rod heads is adjusted, the fastening bolts need to be tightened to tighten the distance between the upper and lower connecting rod heads.

[0004] However, due to manual operation and the movable ball joint, the connecting rod head will swing when tightening the fastening bolts, which will cause the length of the connecting rod to change, causing the height valve connecting rod to tilt, and ultimately affecting the weighing result, resulting in the need to reweigh the vehicle, affecting the maintenance efficiency. For this reason, a height valve fixing device for subways is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a height valve fixing device for subways, so as to solve the problem in the above-mentioned background technology that the connecting rod in the existing height valve is prone to change in length when tightening the fastening bolts, thereby causing weighing failure and resulting in low maintenance efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a height valve fixing device for subways, comprising an upper thin column and a lower connecting pipe, the upper thin column is arranged as a cylinder, the lower part of the upper thin column is arranged with an external thread, the lower connecting pipe is arranged as a cylinder, the upper part of the lower connecting pipe is provided with a cylindrical recess, the inner wall of the cylindrical recess is arranged with an internal thread, the upper thin column and the lower connecting pipe are threadedly connected at the external thread and the internal thread, the top of the upper thin column and the bottom of the lower connecting pipe are arranged with pawls, the pawls are arranged in a U shape, suction cups are arranged on both sides of the front of the pawls, and the bottom width of the pawls is greater than the diameters of the upper thin column and the lower connecting pipe.

[0007] Preferably: an upper fine-tuning component is provided at the connection between the upper thin column and the pawl, the upper fine-tuning component includes an upper inner recess opened at the top of the upper thin column, an upper recess is opened on the bottom surface of the pawl close to the upper thin column, the upper thin column is inserted into the upper recess, the inner bottom surface of the upper inner recess is fixedly connected with a first spring, and one end of the first spring away from the inner bottom surface of the upper inner recess is fixedly connected to the inner bottom surface of the upper recess.

[0008] Preferably: a lower fine-tuning component is provided at the connection between the lower connecting pipe and the pawl, the lower fine-tuning component includes a lower inner recess opened at the bottom of the lower connecting pipe, a lower recess is opened on the top surface of the pawl close to the lower connecting pipe, the lower connecting pipe is inserted into the lower recess, a second spring is fixedly connected to the inner bottom surface of the lower inner recess, and one end of the second spring away from the inner bottom surface of the lower inner recess is fixedly connected to the inner bottom surface of the lower recess.

[0009] Preferably, the top of the upper thin column is configured as a prism, and the upper notch is configured as a notch matching the prism.

[0010] Preferably, the bottom of the lower connecting pipe is configured as a prism, and the lower recess is configured as a recess matching the prism.

[0011] Preferably, the suction cup is made of rubber and can be adsorbed on the ball joint of the height valve connecting rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Through the setting of the upper thin column, the lower pipe and the pawl, the device can be flexibly adjusted according to the length of the connecting rod and the distance between the upper and lower connecting rod heads can be fixed, thereby avoiding the change in the length of the connecting rod caused by the rotation of the fastening bolt and ultimately affecting the accuracy of the height valve. Among them, the setting of the suction cup further improves the stability of the pawl when it is fixed, greatly improving the working efficiency.

[0014] 2. By setting up the upper and lower fine-tuning components, it is only necessary to pull the pawl, and the first spring or the second spring is stretched. The bottom surface of the pawl is still pressed between the two connecting rod heads under the pulling force of the first spring or the second spring, thereby successfully achieving the fine-tuning of the length of the device itself to fix the two connecting rod heads, thereby improving the flexibility of the device and facilitating its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the upper thin column and the lower connecting pipe in the utility model;

[0016] Figure 2 It is a structural schematic diagram of the upper fine adjustment assembly on the upper thin column in the utility model;

[0017] Figure 3It is a structural schematic diagram of the lower fine-tuning assembly on the lower connecting pipe in the utility model;

[0018] Figure 4 It is a schematic diagram of assembling the upper thin column and the lower connecting pipe in the utility model;

[0019] Figure 5 It is an application schematic diagram of the utility model.

[0020] In the figure: 1, upper thin column; 101, external thread; 2, lower connecting pipe; 201, internal thread; 3, ratchet; 301, upper notch; 302, lower notch; 4, suction cup; 5, upper inner notch; 501, first spring; 6, lower inner notch; 601, second spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] Reference Figure 1-5 As shown, the utility model provides a technical solution for a height valve fixing device for a subway:

[0024] A height valve fixing device for subways comprises an upper thin column 1 and a lower connecting pipe 2, wherein the upper thin column 1 is arranged as a cylinder, an external thread 101 is arranged at the lower part of the upper thin column 1, the lower connecting pipe 2 is arranged as a cylinder, a cylindrical recess is opened at the upper part of the lower connecting pipe 2, an internal thread 201 is arranged on the inner wall of the cylindrical recess, the upper thin column 1 and the lower connecting pipe 2 are threadedly connected at the external thread 101 and the internal thread 201, a ratchet 3 is arranged at the top of the upper thin column 1 and the bottom of the lower connecting pipe 2, the ratchet 3 is arranged in a U shape, suction cups 4 are arranged on both sides of the front of the ratchet 3, and the bottom width of the ratchet 3 is greater than the diameter of the upper thin column 1 and the lower connecting pipe 2.

[0025] It should be additionally explained that the suction cup 4 is made of rubber and can be adsorbed on the ball joint of the height valve connecting rod.

[0026] By setting the upper thin column 1, the lower connecting pipe 2 and the pawl 3, it is successfully achieved to flexibly adjust the length of the device itself according to the length of the connecting rod and fix the distance between the upper and lower connecting rod heads, thereby avoiding the change in the length of the connecting rod caused by rotating the fastening bolt and ultimately affecting the accuracy of the height valve. Among them, the setting of the suction cup 4 further improves the stability of the pawl 3 when it is fixed, greatly improving the working efficiency.

[0027] Embodiment 2:

[0028] An upper fine-tuning component is provided at the connection between the upper thin column 1 and the pawl 3, and the upper fine-tuning component includes an upper inner recess 5 opened at the top of the upper thin column 1, and an upper recess 301 is opened on the bottom surface of the pawl 3 close to the upper thin column 1. The upper thin column 1 is inserted into the upper recess 301, and the inner bottom surface of the upper inner recess 5 is fixedly connected with a first spring 501, and one end of the first spring 501 away from the inner bottom surface of the upper inner recess 5 is fixedly connected to the inner bottom surface of the upper recess 301.

[0029] Furthermore, the top of the upper thin column 1 is configured as a prism, and the upper notch 301 is configured as a notch matching the prism.

[0030] Embodiment 3:

[0031] A lower fine-tuning component is provided at the connection between the lower connecting pipe 2 and the pawl 3, and the lower fine-tuning component includes a lower inner recess 6 opened at the bottom of the lower connecting pipe 2, and a lower recess 302 is opened on the top surface of the pawl 3 close to the lower connecting pipe 2. The lower connecting pipe 2 is inserted into the lower recess 302, and the inner bottom surface of the lower inner recess 6 is fixedly connected with a second spring 601, and one end of the second spring 601 away from the inner bottom surface of the lower inner recess 6 is fixedly connected to the inner bottom surface of the lower recess 302.

[0032] Furthermore, the bottom of the lower pipe 2 is configured as a prism, and the lower notch 302 is configured as a notch matching the prism.

[0033] Working principle of Examples 1-3: When using this device to fix the height valve, it is first necessary to supplement that the height valve includes two height valve connecting rods, connecting rod heads connected by a ball joint, connecting rods threaded between the connecting rod heads, and fastening bolts threaded on the connecting rods. When the distance between the upper and lower connecting rod heads is adjusted, the fastening bolts need to be tightened to tighten the distance between the upper and lower connecting rod heads.

[0034] According to the distance between the upper and lower connecting rod heads, by rotating the upper thin column 1 or the lower connecting pipe 2, the distance between the pawl 3 on the upper thin column 1 and the pawl 3 on the lower connecting pipe 2 is enlarged or shortened and equal to the distance between the upper and lower connecting rod heads. At this time, the two pawls 3 are located on the same plane facing one side of the ball joint. The device is brought close to the connecting rod so that the upper and lower pawls 3 are just stuck between the top of the upper connecting rod head and the bottom of the lower connecting rod head. At this time, the suction cup 4 is compressed and adsorbed on the side wall of the ball joint, and the ball in the ball joint is stuck in the U-shaped space of the pawl 3. The user can turn the fastening bolt and tighten it.

[0035] Since the front faces of the two pawls 3 need to be kept on the same vertical plane, therefore, when adjusting the distance between the two pawls 3 by rotating the upper thin column 1 or the lower pipe 2, it may be encountered that after the height is adjusted, the front faces of the two pawls 3 are not on the same vertical plane, and the distance between the two connecting rod heads cannot be fixed. By setting the upper and lower fine-tuning components, it is only necessary to rotate the upper thin column 1 or the lower pipe 2 to make the distance between the two pawls 3 slightly smaller than the distance between the two connecting rod heads, but the front faces of the two pawls 3 are on the same vertical plane. At this time, it is only necessary to pull the pawl 3 so that the first spring 501 or the second spring 601 is stretched, and the bottom surface of the pawl 3 is still against the two connecting rod heads under the pulling force of the first spring 501 or the second spring 601, thereby successfully achieving the fixation of the two connecting rod heads, improving the flexibility of the device, and facilitating use.

[0036] It should be added that, in the process of pulling the pawl 3, the end of the pawl 3 never leaves the upper notch 301 or the lower notch 302, and the upper part of the upper thin column 1 and the lower part of the lower connecting pipe 2 are set to be prism-shaped, so that the upper thin column 1 and the pawl 3 or the lower connecting pipe 2 and the pawl 3 will not rotate relative to each other due to pulling the pawl 3, and the front faces of the two pawls 3 are always kept in the same vertical plane. Through such a setting, the stability of the device is better and it is easy to operate.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A height valve fixing device for subway, characterized in that: The invention comprises an upper thin column (1) and a lower connecting pipe (2), wherein the upper thin column (1) is arranged as a cylinder, and the lower part of the upper thin column (1) is provided with an external thread (101), and the lower connecting pipe (2) is arranged as a cylinder, and the upper part of the lower connecting pipe (2) is provided with a cylindrical recess, and the inner wall of the cylindrical recess is provided with an internal thread (201), and the upper thin column (1) and the lower connecting pipe (2) are threadedly connected at the external thread (101) and the internal thread (201), and the top of the upper thin column (1) and the bottom of the lower connecting pipe (2) are provided with a pawl (3), and the pawl (3) is arranged in a U shape, and suction cups (4) are provided on both sides of the front of the pawl (3), and the bottom width of the pawl (3) is greater than the diameter of the upper thin column (1) and the lower connecting pipe (2).

2. A height valve fixing device for subway according to claim 1, characterized in that: An upper fine-tuning component is provided at the connection between the upper thin column (1) and the pawl (3), and the upper fine-tuning component comprises an upper inner recess (5) opened at the top of the upper thin column (1), an upper recess (301) is opened on the bottom surface of the pawl (3) close to the upper thin column (1), the upper thin column (1) is inserted into the upper recess (301), and a first spring (501) is fixedly connected to the inner bottom surface of the upper inner recess (5), and one end of the first spring (501) away from the inner bottom surface of the upper inner recess (5) is fixedly connected to the inner bottom surface of the upper recess (301).

3. A height valve fixing device for subway according to claim 1, characterized in that: A lower fine-tuning component is provided at the connection between the lower connecting pipe (2) and the pawl (3), and the lower fine-tuning component comprises a lower inner recess (6) provided at the bottom of the lower connecting pipe (2), a lower recess (302) is provided on the top surface of the pawl (3) close to the lower connecting pipe (2), the lower connecting pipe (2) is inserted into the lower recess (302), a second spring (601) is fixedly connected to the inner bottom surface of the lower inner recess (6), and one end of the second spring (601) away from the inner bottom surface of the lower inner recess (6) is fixedly connected to the inner bottom surface of the lower recess (302).

4. A height valve fixing device for subway according to claim 2, characterized in that: The top of the upper thin column (1) is configured as a prism, and the upper notch (301) is configured as a notch matching the prism.

5. The height valve fixing device for subway according to claim 3, characterized in that: The bottom of the lower connecting pipe (2) is configured as a prism, and the lower recess (302) is configured as a recess matching the prism.

6. A height valve fixing device for subway according to claim 1, characterized in that: The suction cup (4) is made of rubber and can be adsorbed on the ball joint of the height valve connecting rod.

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