Rotation stopping arm for speed sensor base

Abstract

The utility model relates to the technical field of speed sensor bases, in particular to a rotation stopping arm for a speed sensor base. The speed sensor comprises a framework ball head base, a speed sensor base body and a sleeve rod, the sleeve rod is arranged between the framework ball head base and the speed sensor base body, a first ball head is jointly connected between the end of the sleeve rod and one side of the speed sensor base body, and a separable push rod body is arranged in the sleeve rod. And a second ball head is jointly connected between the end part of the push rod body and one side of the framework ball head base. The connecting position of the sleeve rod and the ball head is changed into an integrated design from an original screwing mode of an M8 stud and an M8 internal thread, so that the mechanical strength of the sleeve rod is greatly enhanced under the condition that the weight of a product is not increased, and meanwhile, the rotating abrasion is reduced through lubricating grease.

Description

Technical Field

[0001] The utility model relates to the technical field of speed sensor bases, in particular to a rotation-stopping arm for a speed sensor base. Background Art

[0002] Subway vehicle speed sensors play a vital role in subway operations. They are responsible for detecting the train's operating speed and transmitting the speed signal to the brake control unit and traction system to ensure safe and punctual operation of the train. The speed sensor base on subway vehicles uses a swivel arm to ensure normal and stable detection of wheel rotation speed to generate a pulse frequency signal, which is transmitted to the vehicle's control system to control the vehicle's speed and operating status. This swivel arm is usually designed as a universal flexible structure to adapt to the various stresses and vibrations generated by subway vehicles during operation. It is connected to the frame through an auxiliary mechanism and has a clutch mechanism to wrap the ball head body, ensuring that the speed sensor can remain stable when subjected to radial and axial forces.

[0003] However, the existing subway speed sensor base uses a rotation-stop arm, which has the following disadvantages:

[0004] First, the connection method between the sleeve rod and the first ball head, and between the push rod and the second ball head on the anti-rotation arm is a screw connection of M8 stud + M8 internal thread, resulting in low mechanical performance. In addition, the sleeve rod and the ball head are not an integral structure. At the same time, the push rod and the ball head are not an integral structure, which further affects the mechanical strength.

[0005] Secondly, if the push rod and ball head are directly designed into an integrated structure, the tensile rectangular spring in the sleeve rod cannot be installed on the push rod, affecting normal assembly;

[0006] Third, when the anti-rotation arm is movably connected to the frame ball head base and the speed sensor through the ball head, because the two ball heads are not designed with a cavity for storing grease, after the product has been used for a period of time, the grease used in the assembly of the ball head and the ball head seat is consumed, the friction resistance increases, and it is easy to cause wear and damage when rotating for a long time to adapt to various stresses. In view of this, we propose a anti-rotation arm for the speed sensor base. Utility Model Content

[0007] The purpose of the utility model is to provide a rotation-stop arm for a speed sensor base, so as to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above object, the utility model provides a rotation stopping arm for speed sensor base, including frame ball head base, speed sensor base body and sleeve rod, sleeve rod setting between frame ball head base and speed sensor base body, common connection has first ball head between sleeve rod end and one side of speed sensor base body, the inside of sleeve rod is provided with separable push rod body, common connection has second ball head between push rod body end and one side of frame ball head base.

[0009] As further improvement of the technical scheme, the push rod body comprises a first push rod and a second push rod, the first push rod and the second push rod are connected through M12X1.25 threads, an elastic locking pin is installed at the connection position of the first push rod and the second push rod, and the elastic locking pin is used for locking the first push rod and the second push rod.

[0010] As further improvement of the technical scheme, a first cavity is arranged between the inner cavity of the connection position of the first ball head and the speed sensor base body, and a second cavity is arranged between the inner cavity of the connection position of the second ball head and the frame ball head base, and the first cavity and the second cavity are used for storing grease.

[0011] As further improvement of the technical scheme, a gap between the end of the sleeve rod and the push rod body is provided with a skeleton oil seal.

[0012] As further improvement of the technical scheme, the first ball head and the end of the sleeve rod are combined into an integral whole, and the second ball head and the end of the first push rod are combined into an integral whole.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] In the rotation stopping arm for speed sensor base, on the one hand, the connection position of the sleeve rod and the first ball head is changed from the original M8 stud + M8 internal thread connection mode to integral design, the mechanical strength of the sleeve rod is strengthened, the first ball head and the sleeve rod are combined into an integral whole through the first ball head, the mechanical strength of the first ball head and the sleeve rod is strengthened, the second ball head and the push rod body are combined into an integral whole, and the mechanical strength of the second ball head and the push rod body is strengthened;

[0015] On the other hand, the push rod body is provided in a separable structure, the tensile rectangular spring in the sleeve rod can be installed on the push rod, the longitudinal damping telescopic function of the rotation stopping arm for speed sensor base is given, and the stable operation of the speed sensor can be ensured when the speed sensor bears the longitudinal stress during operation;

[0016] Meanwhile, the first cavity and the second cavity for storing grease are arranged, the universal flexible rotation stopping arm is more smooth during use, and the skeleton oil seal prevents dust and water from entering the product (design protection level IP67) to cause the product to be stuck and unable to be telescopic. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model;

[0019] Figure 3 For the utility model Figure 2 Schematic diagram of the structure at A in the middle;

[0020] Figure 4 For the utility model Figure 2 Schematic diagram of the structure at B in the middle;

[0021] Figure 5 For the utility model Figure 2 Schematic diagram of the structure at point C in the middle.

[0022] The meaning of each number in the figure is:

[0023] 100, frame ball head base; 200, speed sensor base body; 300, sleeve rod; 301, first ball head; 400, push rod body; 4010, second ball head; 401, first push rod; 402, second push rod; 4012, elastic locking pin; 3010, first chamber; 4011, second chamber; 403, skeleton oil seal. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Subway vehicle speed sensors play a vital role in subway operations. They detect the train's speed and transmit the speed signal to the brake control unit and traction system to ensure safe and punctual operation. The speed sensor base on subway vehicles uses a swivel arm to detect the normal and stable rotational speed of the wheels to generate a pulse frequency signal, which is transmitted to the vehicle's control system to control the vehicle's speed and operating status. This swivel arm is typically designed as a universal flexible structure to accommodate the various stresses and vibrations generated during subway vehicle operation. It is connected to the frame via an auxiliary mechanism and features a gripping mechanism to wrap around the ball head, ensuring the speed sensor remains stable despite radial and axial forces.

[0026] See also Figure 1-Figure 5 As shown, this embodiment provides a rotation-stop arm for a speed sensor base, including a frame ball head base 100, a speed sensor base body 200 and a sleeve rod 300, wherein the sleeve rod 300 is arranged between the frame ball head base 100 and the speed sensor base body 200. Considering that in the existing rotation-stop arm for a subway speed sensor base, the sleeve rod 300 is separated from the ball head and is not a whole, resulting in low mechanical strength between the sleeve rod 300 and the ball head; the push rod is separated from the ball head and is not a whole, resulting in low mechanical strength between the push rod and the ball head, therefore, specifically as follows: a first ball head 301 is commonly connected between the end of the sleeve rod 300 and one side of the speed sensor base body 200, a detachable push rod body 400 is arranged inside the sleeve rod 300, and a second ball head 4010 is commonly connected between the end of the push rod body 400 and one side of the frame ball head base 100.

[0027] The improvement of this embodiment is that:

[0028] The connection between the sleeve rod 300 and the ball head (the first ball head 301 and the second ball head 4010 involved in this article) is changed from the original M8 stud + M8 internal thread screw connection method to an integrated design. In this way, the mechanical strength of the sleeve rod 300 is enhanced without increasing the weight of the product. The first ball head 301 and the sleeve rod 300 are combined into a whole, thereby enhancing the mechanical strength of the first ball head 301 and the sleeve rod 300. The second ball head 4010 and the push rod body 400 are combined into a whole, thereby enhancing the mechanical strength of the second ball head 4010 and the push rod body 400. By setting the push rod body 400 as a detachable structure, the tension rectangular spring in the sleeve rod 300 can be installed on the push rod, giving the speed sensor base body 200 a longitudinal damping telescopic function with the anti-rotation arm, so that the speed sensor can ensure smooth operation even when it is subjected to longitudinal stress during operation.

[0029] First, the first ball head 301 is combined with the end of the sleeve rod 300 into a whole, and the second ball head 4010 is combined with the end of the first push rod 401 into a whole. By combining the first ball head 301 and the sleeve rod 300 into a whole, the mechanical strength of the first ball head 301 and the sleeve rod 300 is strengthened, and the second ball head 4010 and the push rod body 400 are combined into a whole to strengthen the mechanical strength of the second ball head 4010 and the push rod body 400. Specifically, the connection between the first ball head 301 and the sleeve rod 300 is changed from the original M8 stud + M8 internal thread screw connection method in terms of structure, which greatly strengthens the strength of the product connection structure. The connection between the second ball head 4010 and the push rod body 400 is also changed from the original M8 stud + M8 internal thread screw connection method in terms of structure, which greatly strengthens the strength of the product connection structure.

[0030] Then, in order to make the push rod body 400 can be divided into two parts, the push rod body 400 includes the first push rod 401 and the second push rod 402, the first push rod 401 and the second push rod 402 are connected by M12X1.25 thread, the first push rod 401 and the second push rod 402 are connected by the elastic locking pin 4012, the elastic locking pin 4012 is used to lock the first push rod 401 and the second push rod 402;

[0031] The first push rod 401 and the second push rod 402 are connected by M12X1.25 thread, so that the first push rod 401 and the second push rod 402 can be tightly matched together to form a stable and undetachable structure, so that the stress can be evenly distributed on the whole push rod body 400, avoiding damage caused by local stress concentration; since the first push rod 401 and the second push rod 402 are separately arranged during assembly, the stretching rectangular spring in the sleeve rod can be installed on the push rod, giving the speed sensor base body 200 a longitudinal damping telescopic function with the rotation stopping arm, so that the speed sensor can run stably when it bears longitudinal stress. At the same time, the mechanical strength of the connection between the second ball head 4010 and the first push rod 401 and the second push rod 402 is strengthened, then the first push rod 401 and the second push rod 402 are locked by the elastic locking pin 4012, further forming a stable and undetachable structure, and at the same time, the first push rod 401 and the second push rod 402 are both provided with "compression-stretching" rectangular springs inside the sleeve rod 300, realizing a bidirectional flexible connecting rod structure, which can maximize the buffering of the longitudinal impact acceleration caused by the impact vibration of the OPG speed sensor base and the OPG speed sensor during the start, acceleration and braking of the subway vehicle, ensuring the stable operation of the equipment.

[0032] Secondly, in order to make the universal flexible rotation stopping arm more smooth during use, the first cavity 3010 is arranged between the inner cavity of the connection between the first ball head 301 and the speed sensor base body 200, and the second cavity 4011 is arranged between the inner cavity of the connection between the second ball head 4010 and the frame ball head base 100, the first cavity 3010 and the second cavity 4011 are both used for storing lubricating grease, wherein the cut-off of the first ball head 301 and the cut-off of the second ball head 4010 are both 2mm, realizing that when the first ball head 301 rotates in the inner cavity of the connection between the speed sensor base body 200 and the second ball head 4010 rotates in the inner cavity of the connection between the frame ball head base 100, the lubricating grease is applied in the inner cavity of the connection between the speed sensor base body 200 and the inner cavity of the connection between the frame ball head base 100, reducing the friction resistance, which is conducive to the smooth use of the universal flexible rotation stopping arm.

[0033] Furthermore, considering that dust and water may splash into the interior of the sleeve rod 300, a skeleton oil seal 403 is provided in the gap between the end of the sleeve rod 300 and the connection between the push rod body 400. The skeleton oil seal 403 is a sealing device used in mechanical components. The function of the skeleton oil seal 403 is to prevent dust and water from splashing into the interior of the sleeve rod 300, causing the push rod body 400, rectangular spring or bushing in the sleeve rod 300 to become stuck or rusted.

[0034] When the anti-rotation arm for the speed sensor base of the present invention is used in practice, during the operation of a subway vehicle, the speed sensor base body 200 will be subjected to various stresses such as vehicle vibration and track unevenness. The anti-rotation arm, as a key component connecting the speed sensor base body 200 and the vehicle body structure, can effectively disperse and transmit these stresses, thereby reducing the impact force directly acting on the speed sensor.

[0035] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotation-stop arm for a speed sensor base, comprising a frame ball base (100), a speed sensor base body (200) and a sleeve rod (300), wherein the sleeve rod (300) is arranged between the frame ball base (100) and the speed sensor base body (200), and characterized in that: A first ball head (301) is commonly connected between the end of the sleeve rod (300) and one side of the speed sensor base body (200); a detachable push rod body (400) is provided inside the sleeve rod (300); and a second ball head (4010) is commonly connected between the end of the push rod body (400) and one side of the frame ball head base (100).

2. The anti-rotation arm for a speed sensor base according to claim 1, characterized in that: The push rod body (400) comprises a first push rod (401) and a second push rod (402), wherein the first push rod (401) and the second push rod (402) are screwed together via an M12X1.25 thread, and an elastic locking pin (4012) is installed at the connection between the first push rod (401) and the second push rod (402), and the elastic locking pin (4012) is used to lock the first push rod (401) and the second push rod (402).

3. The anti-rotation arm for a speed sensor base according to claim 1, characterized in that: A first chamber (3010) is provided between the inner cavity of the connection point between the first ball head (301) and the speed sensor base body (200), and a second chamber (4011) is provided between the inner cavity of the connection point between the second ball head (4010) and the frame ball head base (100). Both the first chamber (3010) and the second chamber (4011) are used for storing grease.

4. The anti-rotation arm for a speed sensor base according to claim 1, characterized in that: A skeleton oil seal (403) is provided in the gap between the end of the sleeve rod (300) and the connection point of the push rod body (400).

5. The anti-rotation arm for a speed sensor base according to claim 1, characterized in that: The first ball head (301) and the end of the sleeve rod (300) are combined into a whole, and the second ball head (4010) and the end of the first push rod (401) are combined into a whole.

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