Tramcar brake caliper

Abstract

The utility model discloses a tramcar brake caliper, which relates to the technical field of railway vehicle brake, and comprises a first caliper body, a second caliper body, a caliper frame body and a driving device, the first caliper body and the second caliper body are oppositely arranged in the caliper frame body through a connecting assembly; the driving device is used for driving the first clamp body to be close to or far away from the second clamp body; the driving device comprises a motor, a guide column, a lead screw and a lead screw nut, the lead screw and the lead screw nut are matched with each other, the lead screw is rotatably arranged outside the clamp frame body through the motor, one end of the guide column is connected to the lead screw nut, and the other end of the guide column penetrates into the clamp frame body and abuts against the first clamp body. The brake caliper provided by the utility model not only has the advantages of simple structure, small occupied space and low brake noise, but also has good brake performance, and is beneficial to improving the stability and comfort of the tramcar.

Description

Technical Field

[0001] The utility model relates to the technical field of rail vehicle braking, in particular to a tram braking caliper. Background Art

[0002] Trams are an important means of public transportation in many cities, with advantages such as beautiful appearance, environmental protection, advanced performance, comfortable ride, and low operating costs. Modern trams use a low-floor structure, which does not require a special platform, making it convenient for passengers to get on and off the tram. However, it also places high demands on the installation space of the undercarriage equipment, especially the braking system.

[0003] In the prior art, the brakes used in trams are usually hydraulic brakes. However, hydraulic brakes are not only bulky and difficult to arrange, but also have complex pipeline structures and are prone to oil leakage. In addition, the braking process of hydraulic brakes is noisy and will affect the stability and comfort of trams. Therefore, it is urgent to optimize and improve the brakes of trams. Summary of the invention

[0004] The utility model provides a tram brake caliper, the main purpose of which is to solve the problems existing in the tram brake in the prior art.

[0005] The utility model adopts the following technical solutions:

[0006] A tram brake caliper comprises a first caliper body, a second caliper body, a clamp frame and a driving device, wherein the first caliper body and the second caliper body are relatively arranged in the clamp frame through a connecting component, and the driving device is used to drive the first caliper body to approach or move away from the second caliper body; the driving device comprises a motor, a guide column, and a screw rod and a screw rod nut that cooperate with each other, the screw rod is rotatably arranged outside the clamp frame through the motor, one end of the guide column is connected to the screw rod nut, and the other end of the guide column penetrates into the clamp frame and abuts against the first caliper body.

[0007] Furthermore, the connecting assembly includes a connecting column and a compression spring, the connecting column is vertically arranged in the clamp frame, and the two ends of the connecting column are respectively connected to the first clamp body and the second clamp body; the compression spring is sleeved on the outside of the connecting column and abuts between the first clamp body and the second clamp body.

[0008] Furthermore, the two opposite side walls of the clamp frame are provided with mounting holes, the connecting posts are inserted into the mounting holes and locked by locking pieces.

[0009] Furthermore, one end of the connecting column extends to the outside of the clamp frame and is provided with a limiting recess; the locking piece includes a spring hook and a fixing screw, one end of the spring hook is locked to the clamp frame by the fixing screw, and the other end of the spring hook is clamped in the limiting recess.

[0010] Furthermore, an annular boss is provided at one end of the connecting column, and a handle portion for easy operation is provided, and the limiting recess is formed between the annular boss and the handle portion.

[0011] Furthermore, the driving device also includes a screw box and a butterfly spring. The screw box is provided with the screw and the screw nut, and is provided with the butterfly spring for automatically resetting the guide column.

[0012] Furthermore, the driving device also includes a motor box and a reduction box; the motor box is provided with the motor, and the reduction box is provided with a reduction mechanism that is transmission-connected to the motor and the screw rod.

[0013] Furthermore, the speed reduction mechanism includes gear 1, gear 2 and gear 3 that are meshed with each other, the gear 1 is connected to the output shaft of the motor, and the gear 3 is connected to the screw rod.

[0014] Furthermore, the output shaft of the motor extends to the outside of the reduction box and is provided with a detachable hand crank.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The brake caliper provided by the utility model adopts a combination of electric drive and mechanical transmission, which not only has the advantages of simple structure, small space occupation and low braking noise, but also has good braking performance, which helps to improve the stability and comfort of trams and can effectively overcome the defects of hydraulic brakes in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of the utility model is shown in FIG. Figure 1 .

[0018] Figure 2 The structure of the utility model is shown in FIG. Figure 2 (Brake disc not shown).

[0019] Figure 3 The utility model is schematically shown in cross section Figure 1 .

[0020] Figure 4 The utility model is schematically shown in cross section Figure 2 .

[0021] In the figure: 1-first clamp body; 2-second clamp body; 3-clamp frame; 31-connecting column; 311-annular boss; 312-handle; 313-limiting recess; 33-mounting hole; 34-spring hook; 35-fixing screw; 36-first support plate; 37-second support plate; 38-mounting column; 4-driving device; 41-motor box; 411-motor; 412-output shaft; 413-hand crank; 42-screw box; 421-guide column; 422-screw; 423-screw nut; 424-butterfly spring; 43-reduction box; 431-gear one; 432-gear two; 433-gear three; 5-brake disc. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.

[0023] Reference Figures 1 to 4 A tram brake caliper comprises a first caliper body 1, a second caliper body 2, a clamp frame 3 and a driving device 4. The first caliper body 1 and the second caliper body 2 are relatively arranged in the clamp frame 3 through a connecting assembly. The driving device 4 is used to drive the first caliper body 1 to approach or move away from the second caliper body 2. Specifically, the driving device 4 comprises a motor 411, a guide column 421, and a screw rod 422 and a screw nut 423 that cooperate with each other. The screw rod 422 is rotatably arranged outside the clamp frame 3 through the motor 411. One end of the guide column 421 is connected to the screw nut 423, and the other end of the guide column 421 penetrates into the clamp frame 3 and abuts against the first caliper body 1. When working, the motor 411 drives the screw rod 422 to rotate, so that the screw nut 423 moves up and down along the screw rod 422, thereby driving the guide column 421 to move up and down, and then the first caliper body 1 is pushed to approach or move away from the second caliper body 2 through the guide column 421, thereby braking or canceling the brake disc. The tram brake caliper provided by the utility model adopts a combination of electric drive and mechanical transmission, which not only has the advantages of simple structure, small space occupation and low braking noise, but also has good braking performance, which helps to improve the stability and comfort of the tram, and can effectively overcome the defects of hydraulic brakes in the prior art.

[0024] Reference Figure 2 and Figure 4, the connecting component includes a connecting column 31 and a compression spring (not shown in the figure), the connecting column 31 is vertically arranged in the clamp frame 3, and the two ends of the connecting column 31 are respectively connected to the first clamp body 1 and the second clamp body 2; the compression spring is sleeved on the outside of the connecting column 31 and abuts between the first clamp body 1 and the second clamp body 2. Specifically, the connecting column 31 and the compression spring are provided on both sides of the clamp frame 3, and the first clamp body 1 and the second clamp body 2 are provided on both sides to avoid the connecting column 31. When the driving device 4 cancels the brake, the first clamp body 1 will automatically and quickly reset under the action of the elastic potential energy of the compression spring, thereby separating from the second clamp body 2, and then releasing the brake disc. It can be seen that by optimizing the design of the connecting component of the first clamp body 1 and the second clamp body 2, the response speed and operation sensitivity of the tram brake caliper can be improved.

[0025] Reference Figure 2 and Figure 4 Specifically, mounting holes 33 are provided on the opposite side walls of the clamp frame 3, and the connecting column 31 is inserted into the mounting holes 33 and locked by a locking piece. Therefore, when the first clamp body 1 and the second clamp body 2 need to be replaced, it is only necessary to unlock the locking piece and pull the connecting column 31 out of the mounting hole 33 to realize the disassembly and replacement of the first clamp body 1 and the second clamp body 2, which is simpler and more convenient to operate. As a preferred solution: one end of the connecting column 31 extends to the outside of the clamp frame 3 and is provided with a limiting recess 313; the locking piece includes a spring hook 34 and a fixing screw 35, one end of the spring hook 34 is locked to the clamp frame 3 by the fixing screw 35, and the other end of the spring hook 34 is clamped in the limiting recess 313. More specifically, an annular boss 311 is provided at one end of the connecting column 31, and a handle portion 312 for easy operation is provided, and a limiting recess 313 is formed between the annular boss 311 and the handle portion 312. When the connecting column 31 needs to be pulled out, unlocking can be achieved by simply moving the spring hook 34 away from the limiting recess 313 , which is simple and convenient to operate.

[0026] Reference Figure 3 and Figure 4 The drive device 4 also includes a screw box 42 and a butterfly spring 424. The screw box 42 is provided with a screw 422 and a screw nut 423, and a butterfly spring 424 is provided to automatically reset the guide column 421. Specifically, through holes are provided on opposite sides of the screw nut 423, and the upper end of the connecting column 31 is assembled in the through hole and abuts against the butterfly spring 424. When the drive device 4 cancels the brake, the guide column 421 will quickly and automatically reset under the elastic potential energy of the butterfly spring 424, so that the first caliper body 1 is quickly separated from the first caliper body 1, and then the brake disc is released. It can be seen that by setting the butterfly spring 424, it helps to further improve the response speed and operation sensitivity of the tram brake caliper.

[0027] Reference Figures 1 to 3 , the driving device 4 also includes a motor box 41 and a reduction box 43; the motor box 41 is provided with a motor 411, and the reduction box 43 is provided with a reduction mechanism that is transmission-connected to the motor 411 and the screw rod 422. Specifically, the motor box 41 is arranged beside the screw rod box 42, and the reduction box 43 is arranged on the top of the motor box 41 and the screw rod box 42. As a preferred solution: the reduction mechanism includes a gear 1 431, a gear 2 432 and a gear 3 433 that are meshed with each other, the gear 1 431 is connected to the output shaft 412 of the motor 411, and the gear 3 433 is connected to the screw rod 422. The reduction mechanism in the utility model adopts parallel shaft transmission, which has the advantages of bearing large torque and high reliability. Of course, in other embodiments, other reduction mechanisms such as planetary gear transmission can also be adopted.

[0028] Reference Figures 1 to 3 The output shaft 412 of the motor 411 extends to the outside of the reduction box 43 and is provided with a detachable hand crank 413. In order to ensure sealing, the reduction box 43 is provided with a sealing component at the output shaft 412 of the motor 411. Normally, the hand crank 413 is stored in a designated position. When the power supply circuit of the motor 411 fails, if emergency braking is required, the operator can install the hand crank 413 on the output shaft 412 of the motor 411, and drive the reduction mechanism and the screw 422 by shaking the hand crank 413, thereby ensuring that the emergency braking task can be completed, so that the brake caliper has a safety redundancy function.

[0029] Reference Figures 1 to 3 As a preferred solution, the motor box 41 and the reduction box 43 are both made of aluminum shells made by gravity die-casting, thereby increasing the service life. The top of the reduction box 43 is provided with a mounting countersunk hole, which can realize the hidden installation of the bolts to ensure the overall aesthetics.

[0030] Reference Figures 1 to 4 As a preferred solution, the clamp frame 3 includes a first support plate 36, a second support plate 37 and a mounting column 38. The first support plate 36 and the second support plate 37 are fixedly connected by the mounting column 38, and a mounting cavity for mounting the first caliper body 1 and the second caliper body 2 is formed between the two support plates. The brake caliper is installed on the frame of the tram through the mounting column 38. The structure of the clamp frame 3 is simple and optimized, which helps to reduce the dead weight and volume of the brake caliper, and is suitable for trams with low floor structures.

[0031] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A tram brake caliper, characterized in that: It includes a first pliers body, a second pliers body, a clamp frame and a driving device, wherein the first pliers body and the second pliers body are relatively arranged in the clamp frame through a connecting component, and the driving device is used to drive the first pliers body to approach or move away from the second pliers body; the driving device includes a motor, a guide column and a screw rod and a screw rod nut that cooperate with each other, the screw rod is rotatably arranged outside the clamp frame through the motor, one end of the guide column is connected to the screw rod nut, and the other end of the guide column passes through the clamp frame and abuts against the first pliers body.

2. A tram brake caliper according to claim 1, characterized in that: The connecting assembly includes a connecting column and a compression spring. The connecting column is vertically arranged in the clamp frame, and the two ends of the connecting column are respectively connected to the first clamp body and the second clamp body; the compression spring is sleeved on the outside of the connecting column and abuts between the first clamp body and the second clamp body.

3. A tram brake caliper according to claim 2, characterized in that: The two opposite side walls of the clamp frame are both provided with mounting holes, and the connecting column is inserted into the mounting hole and locked by a locking piece.

4. A tram brake caliper as claimed in claim 3, characterized in that: One end of the connecting column extends to the outside of the clamp frame and is provided with a limiting recess; the locking piece includes a spring hook and a fixing screw, one end of the spring hook is locked to the clamp frame by the fixing screw, and the other end of the spring hook is clamped in the limiting recess.

5. A tram brake caliper as claimed in claim 4, characterized in that: An annular boss is provided at one end of the connecting column, and a handle portion is provided for easy operation, and the limiting recess is formed between the annular boss and the handle portion.

6. A tram brake caliper according to claim 1, characterized in that: The driving device also includes a screw box and a butterfly spring. The screw box is provided with the screw and the screw nut, and is provided with the butterfly spring for automatically resetting the guide column.

7. A tram brake caliper according to claim 6, characterized in that: The driving device also includes a motor box and a reduction box; the motor box is provided with the motor, and the reduction box is provided with a reduction mechanism that is transmission-connected to the motor and the screw rod.

8. A tram brake caliper according to claim 7, characterized in that: The speed reduction mechanism comprises a gear 1, a gear 2 and a gear 3 which are meshed with each other, the gear 1 is connected to the output shaft of the motor, and the gear 3 is connected to the screw rod.

9. A tram brake caliper according to claim 7, characterized in that: The output shaft of the motor extends to the outside of the reduction box and is provided with a detachable hand crank.

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