Double-acting brake of electric vehicle

Abstract

The double-acting brake of the electric vehicle comprises a machine shell, a transmission ring is arranged in the machine shell, transmission teeth are arranged at the upper end and the lower end of the transmission ring, a driving shaft is arranged on the machine shell, and an arc-shaped left brake shoe block and an arc-shaped right brake shoe block are arranged at the positions, corresponding to the two sides of the driving shaft at the upper end and the lower end, in the machine shell respectively. The upper end and the lower end of the left brake shoe and the upper end and the lower end of the right brake shoe are attached to the two sides of the driving shaft respectively, a tension spring is further arranged between the left brake shoe and the right brake shoe, and a linkage rod is arranged on the back of the machine shell. The transmission ring is arranged in the machine shell, the two driving shafts are driven by the transmission ring to rotate, so that the rotation synchronism of the driving shafts is guaranteed, the two driving shafts can rotate together only through one linkage rod, the space occupied by the brake is saved, and the service life of the brake is prolonged. And the situation of transmission lagging caused by hinging of a plurality of rocker arms can be avoided, so that the performance of the brake is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brakes, in particular to a double-acting brake for an electric vehicle. Background Art

[0002] The drum brake utilizes a brake transmission mechanism to cause the brake shoe to press the brake friction plate against the inner side of the brake drum, thereby generating a braking force, and decelerating the wheel or stopping the vehicle in the shortest distance as required, so as to ensure driving safety and ensure that the vehicle is parked reliably and cannot slip automatically. The utility model patent specification of patent number: CN202022223061.8, entitled: A double-leading shoe brake for electric vehicles, discloses a brake, which drives the brake shoes on both sides to open or tighten together through upper and lower cams, thereby increasing the force and improving the overall braking performance. The upper and lower cams are synchronously driven by a brake rocker arm assembly. The brake of this structure occupies a large space in its brake rocker arm assembly, and the brake rocker arm assembly is hinged and linked to each other through multiple groups of rocker arms, so when driving the two cams to rotate, it is not only easy to have poor synchronization, but also easy to get stuck between the rocker arms after a long period of work, which seriously affects the performance of the brake. Utility Model Content

[0003] The purpose of the utility model is to avoid the deficiencies of the prior art and provide a double-acting brake for an electric vehicle, thereby effectively solving the deficiencies in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: an electric vehicle double-action brake comprises a housing, a transmission ring is arranged in the housing, the transmission ring is arranged with transmission teeth at the upper and lower ends of the inner side thereof, a driving shaft is arranged at the upper and lower ends of the housing, the transmission ring drives the two driving shafts to rotate synchronously through the transmission teeth, an arc-shaped left brake shoe and a right brake shoe are respectively arranged at positions corresponding to the two sides of the upper and lower driving shafts in the housing, the upper and lower ends of the left brake shoe and the right brake shoe are respectively abutted against the two sides of the upper and lower driving shafts, a tension spring is further arranged between the left brake shoe and the right brake shoe, a linkage rod is arranged at the back of the housing, and the linkage rod is connected to any one of the driving shafts;

[0005] The driving shaft includes a shaft connected to the casing, a driving gear is arranged on the shaft at a position corresponding to the transmission teeth, the driving gear and the transmission teeth are meshed with each other, a pressure plate is also arranged on the shaft at a position above the corresponding driving gear, the pressure plate is pressed above the transmission teeth part, a toggle block is also arranged above the pressure plate, an arc-shaped protruding block is arranged on one side of the toggle block, and the upper and lower ends of the left brake shoe and the right brake shoe respectively abut against the toggle block and the protruding block.

[0006] Furthermore, a cover plate is also provided at the upper end of the toggle block, and the cover plate is pressed on the upper part of the two brake shoes against one end of the driving shaft.

[0007] Furthermore, a threaded joint is provided at the lower end of the shaft rod, the threaded joint passes through the casing and extends out from the back of the casing, the threaded joint is fixed to the casing by a nut, and the linkage rod is installed on any one of the threaded joints.

[0008] Furthermore, the shaft rod is provided with a rectangular clamp head at one end with the threaded joint, the threaded joint protrudes from the clamp head, and the end of the linkage rod is provided with a slot matched with the clamp head.

[0009] Furthermore, the protruding blocks on the upper and lower ends of the driving shaft are oriented in opposite directions, and the ends of the left brake shoe and the right brake shoe are both provided with grooves adapted to the protruding blocks.

[0010] Furthermore, the left brake shoe and the right brake shoe are provided with mounting holes at both upper and lower ends thereof, and both ends of the tension spring are hung in the mounting holes respectively.

[0011] The above technical solution of the utility model has the following beneficial effects: the utility model arranges a transmission ring in the casing, and drives the two drive shafts to rotate with the help of the transmission ring, thereby ensuring the synchronization of the rotation of the drive shafts. Moreover, with such an arrangement, only one linkage rod is needed to realize the common rotation of the two drive shafts, which not only saves the space occupied by the brake, but also avoids the transmission jamming caused by the articulation of multiple rocker arms, thereby greatly improving the performance of the brake itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main plan structure of an embodiment of the utility model;

[0013] Figure 2 This is a plan view of an embodiment of the utility model without the brake shoe and the drive shaft;

[0014] Figure 3 This is a schematic diagram of the rear plan structure of an embodiment of the utility model;

[0015] Figure 4 This is one of the three-dimensional structural schematic diagrams of the drive shaft of the embodiment of the utility model;

[0016] Figure 5 The second schematic diagram of the three-dimensional structure of the drive shaft of the utility model embodiment

[0017] Figure 6 It is a schematic diagram of the back structure of the casing of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0020] like Figure 1-6 As shown, the electric vehicle double-acting brake described in this embodiment includes a casing 1, a transmission ring 2 is arranged in the casing 1, the transmission ring 2 is rotatably placed in the casing 1, the outer wall of the transmission ring 2 is arranged in abutment with the inner wall of the casing 1, the transmission ring 2 is arranged with transmission teeth 21 at the upper and lower ends of the inner side thereof, the casing 1 is provided with driving shafts 3 at the upper and lower ends thereof, the transmission ring 2 drives the two driving shafts 3 to rotate synchronously through the transmission teeth 21, the casing 1 is provided with arc-shaped left brake shoe 4 and right brake shoe 5 at positions corresponding to both sides of the upper and lower driving shafts 3, the upper and lower ends of the left brake shoe 4 and the right brake shoe 5 are respectively abutted against both sides of the upper and lower driving shafts 3, a tension spring 6 is further arranged between the left brake shoe 4 and the right brake shoe 5, a linkage rod 7 is arranged on the back of the casing 1, and the linkage rod 7 is connected to any one of the driving shafts 3;

[0021] The driving shaft 3 includes a shaft rod 31 connected to the housing 1, and a driving gear 32 is arranged on the shaft rod 31 at a position corresponding to the transmission teeth 21. The driving gear 32 meshes with the transmission teeth 21. A pressure plate 33 is also arranged on the shaft rod 31 at a position above the corresponding driving gear 32. The pressure plate 33 is pressed above the transmission teeth 21. The pressure plate 33 can limit the transmission ring 2, thereby preventing the transmission ring 2 from tilting in the housing 1. A toggle block 34 is also arranged above the pressure plate 33, and an arc-shaped protruding block 35 is arranged on one side of the toggle block 34. The upper and lower ends of the left brake shoe 4 and the right brake shoe 5 respectively abut against the toggle block 34 and the protruding block 35.

[0022] A cover sheet 36 is also provided at the upper end of the toggle block 34. The cover sheet 36 is pressed on the upper part of the two brake shoes against one end of the drive shaft 3. The cover sheet 36 can limit the position of the two brake shoes to prevent them from falling off.

[0023] A threaded joint 37 is also provided at the lower end of the shaft 31. The threaded joint 37 passes through the casing 1 and extends out from the back of the casing 1. The threaded joint 37 is fixed to the casing 1 through a nut 8. The linkage rod 7 is installed on any one of the threaded joints 37. The linkage rod 7 is also locked on the threaded head 37 through the nut 8. The nut 8 prevents the threaded joint 37 from being pulled out of the casing 1, but the shaft 31 can be rotated on the casing 1.

[0024] The shaft rod 31 is also provided with a rectangular clamp head 38 at one end thereof with a threaded joint 37 , the threaded joint 37 protrudes from the clamp head 38 , and the end of the linkage rod 7 is provided with a slot matched with the clamp head 38 .

[0025] When the linkage rod 7 is installed, the part of the drive shaft 3 with the threaded joint 37 and the clamp head 38 extends out from the back of the casing 1, and the linkage rod 7 is plugged into the threaded joint 37 and the clamp head 38 for installation. The slot on the linkage rod 7 is plugged into the clamp head 38. Such installation can play a limiting role, so that when the linkage rod 7 rotates, it can lead the drive shaft 3 to rotate.

[0026] An outwardly protruding mounting tube 11 is provided on the back of the housing 1 at a position corresponding to the insertion hole of the drive shaft 3 , a threaded joint 37 and a clamp head 38 extend out of the mounting tube 11 , and the linkage rod 7 is installed at the end of the mounting tube 11 .

[0027] The protruding blocks 35 on the upper and lower drive shafts 3 are oriented in opposite directions, and the ends of the left brake shoe 4 and the right brake shoe 5 are both provided with grooves matched with the protruding blocks 35 .

[0028] During installation, the raised block 35 of the upper drive shaft 3 is set to the left, and the raised block 35 of the lower drive shaft 3 is set to the right. The upper end of the left brake shoe 4 is provided with a groove, and the lower end of the left brake shoe 4 is a plane. The groove of the left brake shoe 4 is clamped in the raised block 35 of the upper drive shaft 3, and the plane of the lower end of the left brake shoe 4 is in contact with the plane of the toggle block 34 on the lower drive shaft 3. In contrast, the upper end of the right brake shoe 5 is a plane, and the lower end of the right brake shoe 5 is provided with a groove. The upper end of the right brake shoe 5 is in contact with the toggle block 34 of the upper drive shaft 3, and the groove at the lower end of the right brake shoe 5 is clamped in the raised block 35 of the lower drive shaft 3.

[0029] The left brake shoe 4 and the right brake shoe 5 are provided with mounting holes at both upper and lower ends thereof, and both ends of the tension spring 6 are hung in the mounting holes respectively. The tension spring 6 enables the two brake shoes 4 to automatically reset when they are opened.

[0030] The working principle of the utility model is as follows: when it is necessary to control the brakes of the electric vehicle, the driving linkage rod 7 is rotated, and the linkage rod 7 rotates with the driving shaft 3 connected thereto. By driving one driving shaft 3 to rotate, the driving gear 32 on the driving shaft 3 will rotate along the driving teeth 21 on the transmission ring 2, and then drive the transmission ring 2 to rotate in the casing 1. When the transmission ring 2 rotates, it will drive another driving shaft 3 meshed with the transmission ring 2 to rotate synchronously. When the two driving shafts 3 are rotating, the protruding blocks 35 on the driving shaft 3 will cause the brake shoes 4 on both sides to expand outward. At this time, the brake shoes on both sides will perform braking work, and the brake shoes 4 on both sides will stretch the tension spring 6 when expanding outward. When the braking operation is completed, the control of the linkage rod 7 is released. At this time, the tension spring 6 will reset under the action of the tension. When the brake shoes 4 on both sides are reset, they will control the driving shaft 3 to rotate back to the original position. In this way, the synchronous control of the brake shoes on both sides can be achieved.

[0031] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. Electric vehicle double-action brake, characterized in that: The invention comprises a casing, wherein a transmission ring is arranged in the casing, and transmission teeth are arranged at the upper and lower ends of the inner side of the transmission ring, and a driving shaft is arranged at the upper and lower ends of the casing, and the transmission ring drives the two driving shafts to rotate synchronously through the transmission teeth, and an arc-shaped left brake shoe and a right brake shoe are respectively arranged at positions corresponding to the two sides of the upper and lower driving shafts in the casing, and the upper and lower ends of the left brake shoe and the right brake shoe are respectively abutted against the two sides of the upper and lower driving shafts, and a tension spring is further arranged between the left brake shoe and the right brake shoe, and a linkage rod is arranged at the back of the casing, and the linkage rod is connected to any one of the driving shafts; The driving shaft includes a shaft connected to the casing, a driving gear is arranged on the shaft at a position corresponding to the transmission teeth, the driving gear and the transmission teeth are meshed with each other, a pressure plate is also arranged on the shaft at a position above the corresponding driving gear, the pressure plate is pressed above the transmission teeth part, a toggle block is also arranged above the pressure plate, an arc-shaped protruding block is arranged on one side of the toggle block, and the upper and lower ends of the left brake shoe and the right brake shoe respectively abut against the toggle block and the protruding block.

2. The electric vehicle double-acting brake according to claim 1, characterized in that: A cover plate is also arranged at the upper end of the toggle block, and the cover plate is pressed on the upper part of the two brake shoes against one end of the driving shaft.

3. The electric vehicle double-acting brake according to claim 2, characterized in that: The lower end of the shaft is also provided with a threaded joint, which passes through the housing and extends out from the back of the housing. The threaded joint is fixed to the housing through a nut, and the linkage rod is installed on any one of the threaded joints.

4. The electric vehicle double-acting brake according to claim 3, characterized in that: The shaft rod is also provided with a rectangular clamp head at one end with the threaded joint, the threaded joint protrudes from the clamp head, and the end of the linkage rod is provided with a slot matched with the clamp head.

5. The electric vehicle double-acting brake according to claim 4, characterized in that: The protruding blocks on the upper and lower ends of the driving shaft are oriented in opposite directions, and the ends of the left brake shoe and the right brake shoe are both provided with grooves matched with the protruding blocks.

6. The electric vehicle double-acting brake according to claim 1, characterized in that: The left brake shoe and the right brake shoe are both provided with mounting holes at the upper and lower ends thereof, and the two ends of the tension spring are respectively hung in the mounting holes.

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