Buffering and protecting brake shoe carrier assembly mechanism

Abstract

The present application relates to the technical fields of motor vehicle maintenance, in particular to a buffer protection brake shoe carrier assembling mechanism. It comprises a hydraulic machine arranged on a pressing table and a positioning member for positioning the brake shoe carrier, a workpiece carrier is arranged between the brake shoe carrier and the hydraulic machine in a sliding manner, and a separable pressing rod is arranged at the movable end of the hydraulic machine. The sliding direction of the workpiece carrier is perpendicular to the axial direction of the brake shoe carrier shaft hole, and the inside of the workpiece carrier is provided with a workpiece placing hole for placing the workpiece. The workpiece carrier has a fixed state and a sliding state. The movable workpiece carrier and the separable pressing rod are arranged, so that when the workpiece is dislocated with the brake shoe carrier shaft hole, the workpiece is separated from the brake shoe carrier by moving the workpiece carrier, and during the movement of the workpiece carrier, the telescopic rod in the separable pressing rod is also taken out by the workpiece carrier, so that the distance between the hydraulic machine and the brake shoe carrier is increased, thereby avoiding the phenomenon of pressing injury of the brake shoe carrier.

Description

Technical Field

[0001] This invention relates to the field of high-speed train maintenance technology, and more specifically, to a brake shoe assembly mechanism for buffer protection. Background Technology

[0002] After a certain mileage or time of operation, high-speed trains must undergo professional maintenance at prescribed intervals to ensure the reliable function of all components and safe operation. This maintenance work is carried out by qualified high-speed train maintenance companies. The standard maintenance procedure includes: first, separating and disassembling the components to be inspected from the bottom of the train body and transporting them to a dedicated maintenance workshop; then, a series of processes are carried out sequentially, including disassembly, flaw detection, repair, component replacement, reassembly, and performance testing.

[0003] Take the brake shoe holder, a key component in the high-speed train braking system, as an example. During maintenance, the assembly of the brake shoe holder essentially involves pressing the axle into the shaft hole of the brake shoe holder to form a stable fit. This operation requires a high degree of coaxiality and must be completed using an assembly mechanism. The assembly mechanism generates significant axial pressure through hydraulic or mechanical means to smoothly and precisely press the axle into the shaft hole, thus completing the assembly.

[0004] However, the commonly used assembly mechanisms have a design flaw: their pressure heads are usually fixed structures, resulting in a rigid connection for pressure transmission. In actual operation, if there is a slight deviation in the placement of the shaft, and the shaft fails to remain coaxial with the shaft hole of the brake shoe holder, then the enormous pressure applied by the pressure head will deviate from the intended force-bearing area and be mistakenly applied to non-assembly areas of the brake shoe holder (such as edges, flange faces, or weak points in the casting).

[0005] Such off-center loading or misaligned stress can lead to a series of problems: first, excessive local stress can cause deformation or even cracking; second, in severe cases, it may directly cause the workpiece to be scrapped. These damages not only increase unnecessary maintenance costs, but also disrupt the maintenance schedule and reduce maintenance efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a buffer protection brake shoe assembly mechanism, which uses a movable workpiece carrier to position and adjust the workpiece. When the workpiece is not coaxial with the shaft hole of the brake shoe, the workpiece carrier is driven to move and detach from the brake shoe, thereby solving the problem mentioned in the background art, namely, the hydraulic pressure is incorrectly applied to the non-assembly area of ​​the brake shoe.

[0007] To achieve the above objectives, the brake shoe assembly mechanism for buffer protection includes a hydraulic press mounted on a pressing table and a positioning component for positioning the brake shoe. A workpiece carrier is slidably disposed between the brake shoe and the hydraulic press, and a separable pressure rod is provided at the movable end of the hydraulic press. The sliding direction of the workpiece carrier is perpendicular to the axial direction of the brake shoe support shaft hole. The workpiece carrier has a workpiece placement hole for placing the workpiece inside. The workpiece carrier has a fixed state and a sliding state. In the fixed state, the workpiece inside the workpiece carrier is coaxial with the shaft hole of the brake shoe support. It also includes a drive mechanism, which is used to control the workpiece carrier to switch between a fixed state and a sliding state; The separable pressure rod includes a connector and a telescopic rod, wherein the telescopic rod is slidably connected to the connector, and the direction of the slidable connection is perpendicular to the axial direction of the brake shoe support shaft hole; During the pressing process, the moving end of the hydraulic press drives the telescopic rod to contact the workpiece. When the telescopic rod is compressed to a predetermined state, the drive mechanism drives the workpiece carrier to a sliding state, so that the workpiece carrier drives the workpiece and the telescopic rod to leave the pressing area during the sliding process.

[0008] Based on this, the drive mechanism includes a reset spring, a locking component, and an unlocking component; The reset spring is disposed between the side wall of one of the side plates and the workpiece carrier; When the workpiece and the shaft hole of the brake shoe holder are coaxial, the locking component locks the workpiece carrier to a fixed state. The unlocking component is used to drive the locking component to release the lock on the workpiece carrier when the telescopic rod is compressed to a predetermined state.

[0009] Based on this, the locking component includes a locking rod, the bottom end of which slides into the interior of the base plate and the top end of which slides into the unlocking groove inside the workpiece carrier. A compression spring is provided between the bottom end of the locking rod and the interior of the base plate to elastically connect the two.

[0010] Based on this, the connector is fixed to the end of the movable end of the hydraulic press, and a groove is provided on the end of the connector facing the telescopic rod; The opening of the groove faces the same direction as the direction in which the return spring pulls the workpiece carrier to move.

[0011] Based on this, the telescopic rod includes a sleeve and a top rod with one end slidably disposed inside the sleeve; The sleeve is provided with a slider that can slide into or out of the groove at one end near the connector; A support spring is provided between the top rod and the inner end of the sleeve to elastically connect the two.

[0012] Based on this, the unlocking component includes an insert rod with an inclined end. The insert rod is fixed to the bottom of the sleeve and is set in a corresponding unlocking groove. When the support spring is compressed to a predetermined state, the insert rod enters the unlocking groove and presses the locking rod down.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the brake shoe assembly mechanism of this buffer protection, a movable workpiece carrier and a separable pressure rod are set up. When the workpiece is misaligned with the shaft hole of the brake shoe, the workpiece is driven to detach from the brake shoe by moving the workpiece carrier. During the movement of the workpiece carrier, the workpiece carrier will also bring out the telescopic rod in the separable pressure rod, which increases the distance between the hydraulic press and the brake shoe, thereby avoiding the phenomenon of damaging the brake shoe.

[0014] 2. In the buffer protection brake shoe assembly mechanism, when the workpiece and the shaft hole of the brake shoe are not coaxial, the workpiece carrier drives the workpiece to move, which can not only prevent the hydraulic press from crushing the workpiece, but also make the workpiece and the shaft hole of the brake shoe coaxial through the movement of the workpiece carrier. This means that there is still a probability that the workpiece will be pressed into the shaft hole of the brake shoe during the process of the workpiece carrier driving the workpiece to move.

[0015] 3. In the brake shoe assembly mechanism of this buffer protection, the brake shoe is always placed on the top of the base plate by the horizontal placement method. In this way, the height of the brake shoe is fixed. Therefore, when the workpiece is misaligned with the shaft hole of the brake shoe, the misalignment direction is basically horizontal, thereby increasing the probability that the workpiece will be pressed into the shaft hole of the brake shoe during the workpiece carrier's movement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the positioning component of the present invention; Figure 3 This is a schematic diagram of the workpiece carrier of the present invention; Figure 4 This is a schematic diagram of the locking rod of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the locking rod of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the detachable pressure bar of the present invention; Figure 7 This is a schematic diagram of the operation of the workpiece carrier of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the operation of the workpiece carrier of the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the operation of the workpiece carrier of the present invention. Figure 3 .

[0017] The meanings of the labels in the diagram are as follows: 100. Pressing table; 101. Hydraulic press; 110. Positioning component; 111. Base plate; 112. Baffle; 113. Brake shoe support; 114. Stop bar; 120. Workpiece carrier; 121. Workpiece placement hole; 122. Guide rod; 123. Side plate; 124. Return spring; 125. Cylinder; 126. Unlocking groove; 130. Locking rod; 131. Compression spring; 140. Separable pressure rod; 141. Connector; 142. Sleeve; 143. Slide groove; 144. Slider; 145. Top rod; 146. Support spring; 147. Insert rod; 200. Workpiece. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] The function of the brake shoe support 113 is to provide reliable fixation and positioning of the brake shoes and to effectively transmit braking force to them. The brake shoe support 113 is connected to the brake beam via an axle. The axle and the coupler buffer device use an interference fit, and the axle is assembled using an assembly mechanism during installation. Figure 1As shown, the mechanism includes a hydraulic press 101 mounted on a pressing table 100 and a positioning element 110 for positioning the brake shoe support 113. The movable end of the hydraulic press 101 is coaxial with the shaft hole of the brake shoe support 113. By placing the workpiece 200 (i.e., the shaft) on the movement path of the movable end of the hydraulic press 101, the movable end of the hydraulic press 101 can press the workpiece 200 into the shaft hole of the brake shoe support 113.

[0022] like Figure 2 As shown, the positioning component 110 is placed laterally, which makes the axial direction of the shaft hole of the brake shoe support 113 parallel to the ground. This can be understood as the workpiece 200 being laterally pressed into the shaft hole of the brake shoe support 113. Specifically, the positioning component 110 includes a base plate 111, which is fixed to the top of the positioning component 110 by bolts and is located on the extension path of the movable end of the hydraulic press 101. The base plate 111 limits the brake shoe support 113 by multiple baffles 112 provided on the top. The multiple baffles 112 are attached to the side walls of the brake shoe support 113. When the brake shoe support 113 is placed in the multiple baffles 112, the position of the brake shoe support 113 is fixed. To improve the fixing effect, a stop bar 114 is also provided on the top of the base plate 111 on the left side of the brake shoe support 113. The height of the stop bar 114 is higher than the height of the baffle 112. At this time, the baffle 112 fixes the bottom of the brake shoe support 113, while the stop bar 114 supports the middle and upper part of the brake shoe support 113. When the workpiece 200 is pressed into the brake shoe support 113, the movement of the brake shoe support 113 can be prevented.

[0023] It is worth mentioning that the present invention ensures that the brake shoe support 113 always rests on the top of the base plate 111 by placing it horizontally. This fixes the height of the brake shoe support 113. Therefore, when the workpiece 200 is misaligned with the shaft hole of the brake shoe support 113, the misalignment direction is basically horizontal.

[0024] During assembly, the workpiece 200 is placed at the end of the shaft hole of the brake shoe support 113, and then the hydraulic press 101 is started to press the workpiece 200 into the shaft hole of the brake shoe support 113. To avoid the workpiece 200 and the shaft hole of the brake shoe support 113 being misaligned, which could cause the hydraulic press 101 to damage the brake shoe support 113 by pressing the workpiece 200 through it, this invention provides a workpiece carrier 120 between the brake shoe support 113 and the hydraulic press 101, and a separable pressure rod 140 is provided at the movable end of the hydraulic press 101.

[0025] Combination Figure 3The workpiece carrier 120 has a workpiece placement hole 121 inside for placing the workpiece 200. The workpiece carrier 120 is slidably disposed between the brake shoe support 113 and the hydraulic press 101, and the sliding direction of the workpiece carrier 120 is perpendicular to the axial direction of the shaft hole of the brake shoe support 113. The workpiece carrier 120 has a fixed state and a sliding state. In the fixed state, the workpiece 200 inside the workpiece carrier 120 is coaxial with the shaft hole of the brake shoe support 113. The workpiece carrier 120 is connected to a drive mechanism, which is used to control the workpiece carrier 120 to switch between the fixed state and the sliding state.

[0026] The separable pressure rod 140 includes a connector 141 and a telescopic rod. The telescopic rod is slidably connected to the connector 141, and the direction of the sliding connection is perpendicular to the axial direction of the shaft hole of the brake shoe holder 113. During the pressing process, the movable end of the hydraulic press 101 drives the telescopic rod to contact the workpiece 200. When the telescopic rod is compressed to a predetermined state, the drive mechanism drives the workpiece carrier 120 to a sliding state, so that the workpiece carrier 120 drives the workpiece 200 and the telescopic rod to separate from the pressing area during the sliding process.

[0027] The location of the part detached from the pressing area mentioned above can be referenced. Figure 7 The position of the dashed structure in the lower half.

[0028] It should be understood that Figure 3 The position of the workpiece carrier 120 in the middle is the position of the fixed state. In other words, when the workpiece carrier 120 is in the fixed state, the workpiece carrier 120 is located at... Figure 3 In this position, the workpiece placement hole 121 is coaxial with the shaft hole of the brake shoe support 113. When the workpiece 200 is placed into the workpiece placement hole 121, the workpiece 200 can also be made coaxial with the shaft hole of the brake shoe support 113.

[0029] Specifically, such as Figure 2 and Figure 3 As shown, a guide rod 122 is slidably disposed at the bottom of the workpiece carrier 120. The length direction of the guide rod 122 is perpendicular to the axial direction of the brake shoe support 113 shaft hole, thereby achieving the purpose of the sliding direction of the workpiece carrier 120 being perpendicular to the axial direction of the brake shoe support 113 shaft hole. Both ends of the guide rod 122 are fixed to the top of the pressing table 100 by side plates 123. A return spring 124 is disposed between the side wall of one of the side plates 123 and the workpiece carrier 120. The return spring 124 is part of the driving mechanism. When the workpiece carrier 120 is in a fixed state, the return spring 124 is in a stretched state, which provides kinetic energy for the sliding of the workpiece carrier 120.

[0030] Another part of the drive mechanism is a locking component. This locking component locks the workpiece carrier 120 when the workpiece placement hole 121 is coaxial with the shaft hole of the brake shoe support 113, thus fixing the workpiece carrier 120 in a fixed state. Specifically, as follows... Figure 4and Figure 5 As shown, the locking component includes a locking rod 130, the bottom end of which slides into the interior of the base plate 111 and the top end of which slides into the unlocking groove 126 inside the workpiece carrier 120. A compression spring 131 is provided between the bottom end of the locking rod 130 and the interior of the base plate 111 to elastically connect the two.

[0031] In practical implementation, a clearance groove is provided at the bottom of the workpiece carrier 120. The clearance groove reduces the thickness of the bottom of the unlocking groove 126 (corresponding to the clearance groove), so that the thickness of the bottom of the unlocking groove 126 is less than the height of the arc-shaped structure at the top of the locking rod 130. In this way, the locking rod 130 does not need to be completely detached from the workpiece carrier 120. When the arc surface of the locking rod 130 moves down to the top of the clearance groove, the return spring 124 pulls the workpiece carrier 120 to move, which can push the locking rod 130 down, so that the locking rod 130 is detached from the workpiece carrier 120.

[0032] After the return spring 124 pulls the workpiece carrier 120 to move, a cylinder 125 can be installed on the side wall of the side plate 123 to drive the workpiece carrier 120 back to the fixed position.

[0033] Another part of the drive mechanism is the unlocking component, which is fixed to the telescopic rod. For ease of description and understanding, the structure of the connector 141 and the telescopic rod will be disclosed first.

[0034] like Figure 6 As shown, the connector 141 is fixed to the end of the movable end of the hydraulic press 101. The fixing method can be threaded connection, welding, etc. The end of the connector 141 facing the telescopic rod is provided with a groove 143. The opening of the groove 143 is aligned with the direction in which the return spring 124 pulls the workpiece carrier 120 to move.

[0035] The telescopic rod includes a sleeve 142 and a push rod 145 slidably disposed inside the sleeve 142. A slider 144, capable of sliding into or out of a groove 143, is provided at the end of the sleeve 142 near the connector 141. A support spring 146 elastically connects the push rod 145 and the inner end of the sleeve 142. Furthermore, ball bearings or rollers can be provided within the groove 143 to reduce the sliding friction of the slider 144.

[0036] The unlocking component includes a rod 147 fixedly installed at the bottom of the sleeve 142. The end of the rod 147 is inclined and the position of the rod 147 corresponds to the unlocking groove 126. When the support spring 146 is compressed to a predetermined state, the rod 147 enters the unlocking groove 126 and presses the locking rod 130 to move down.

[0037] The working principle of this invention will be described in detail below: like Figure 7As shown, the workpiece 200 is placed into the workpiece placement hole 121, and then the hydraulic press 101 is started. The movable end of the hydraulic press 101 drives the connector 141, sleeve 142 and push rod 145 to move. When the push rod 145 contacts the workpiece 200, the workpiece 200 is pushed towards the brake shoe support 113.

[0038] When workpiece 200 and brake shoe support 113 are not coaxial, refer to Figure 7 In the middle section, the workpiece 200 and the brake shoe support 113 are not coaxial, meaning the workpiece 200 cannot be pushed by the push rod 145. At this point, the push rod 145 cannot move, causing the support spring 146 to be compressed and deformed. The push rod 145 will then continue to move, inserting the insertion rod 147 into the unlocking slot 126 and pressing the locking rod 130, causing the locking rod 130 to move downwards and disengage from the workpiece carrier 120. Since the spring force of the return spring 124 is greater than that of the support spring 146, the stretched return spring 124 can rebound, causing the workpiece carrier 120 to move. (Reference) Figure 7 In the lower half of the process, the workpiece carrier 120 moves, causing the workpiece 200 in the workpiece placement hole 121 to disengage from the brake shoe support 113. At the same time, since the insertion rod 147 is inserted into the unlocking groove 126, the workpiece carrier 120 will also move the sleeve 142 through the insertion rod 147 during the movement, causing the sleeve 142 to disengage from the slide groove 143 through the slider 144. At this time, the movable end of the hydraulic press 101 is only the connector 141. The distance between the connector 141 and the brake shoe support 113 is large, thereby avoiding the phenomenon of damaging the brake shoe support 113.

[0039] When workpiece 200 is coaxial with brake shoe support 113, refer to Figure 8 During the process of the push rod 145 pushing the workpiece 200 to move, the support spring 146 is compressed and deformed. However, since the workpiece 200 can enter the shaft hole of the compression spring 131, the support spring 146 is compressed slightly (the amount of compression is lower than the amount of compression when the shaft is different as described above) so that it can overcome the friction between the workpiece 200 and the shaft hole of the brake shoe support 113, thereby pushing the workpiece 200 into the shaft hole of the brake shoe support 113. When the workpiece 200 enters the shaft hole of the brake shoe support 113, since the length of the workpiece 200 is greater than the thickness of the brake shoe support 113, the end of the workpiece 200 will still be in the workpiece placement hole 121. Therefore, the return spring 124 cannot drive the workpiece carrier 120 to move.

[0040] It should be understood that during the operation of this invention, when the return spring 124 rebounds and drives the moving workpiece 200 to move through the workpiece carrier 120, although the end of the workpiece 200 will rub against the side wall of the brake shoe support 113, this invention avoids the problem that the brake shoe support 113 will be deformed or even cracked due to excessive force. Therefore, the scratches caused by slight friction can be solved by subsequent painting.

[0041] Moreover, reference Figure 9 A is the center axis of the shaft hole of brake shoe support 113, and B is the center axis of workpiece 200. Figure 9 Based on the state of the workpiece, when the axis B of the workpiece 200 is lower than the center axis A of the shaft hole of the brake shoe holder 113, the workpiece carrier 120 will be pulled upward by the return spring 124. Therefore, the workpiece carrier 120 will drive the workpiece 200 to move upward during the pulling process. During the upward movement, the axis B will briefly coincide with the axis A. During the coincidence process, the compressed support spring 146 will push the workpiece 200 into the shaft hole of the brake shoe holder 113, thereby completing the pressing of the workpiece 200 in different axis states.

[0042] In other words, when the workpiece 200 and the brake shoe support 113 are not coaxial, the workpiece carrier 120 can not only prevent the hydraulic press 101 from damaging the workpiece 200, but also make the workpiece 200 and the brake shoe support 113 coaxial through the movement of the workpiece carrier 120. This means that there is still a probability that the workpiece 200 will be pressed into the shaft hole of the brake shoe support 113 during the process of the workpiece carrier 120 moving the workpiece 200.

[0043] The foregoing has shown and described 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 embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brake shoe assembly mechanism for buffer protection, comprising a hydraulic press (101) mounted on a pressing table (100) and a positioning element (110) for positioning the brake shoe (113), characterized in that: A workpiece carrier (120) is slidably disposed between the brake shoe support (113) and the hydraulic press (101), and a separable pressure rod (140) is provided on the movable end of the hydraulic press (101). The sliding direction of the workpiece carrier (120) is perpendicular to the axial direction of the shaft hole of the brake shoe support (113). The workpiece carrier (120) is provided with a workpiece placement hole (121) for placing the workpiece (200). The workpiece carrier (120) has a fixed state and a sliding state. In the fixed state, the workpiece (200) in the workpiece carrier (120) is coaxial with the shaft hole of the brake shoe support (113). It also includes a drive mechanism for controlling the workpiece carrier (120) to switch between a fixed state and a sliding state; The separable pressure rod (140) includes a connector (141) and a telescopic rod, wherein the telescopic rod is slidably connected to the connector (141), and the direction of the slid connection is perpendicular to the axial direction of the shaft hole of the brake shoe support (113); During the pressing process, the movable end of the hydraulic press (101) drives the telescopic rod to contact the workpiece (200). When the telescopic rod is compressed to a predetermined state, the drive mechanism drives the workpiece carrier (120) to a sliding state, so that the workpiece carrier (120) drives the workpiece (200) and the telescopic rod to leave the pressing area during the sliding process.

2. The brake shoe assembly mechanism for buffer protection according to claim 1, characterized in that: The positioning component (110) includes a base plate (111) set on the top of the pressing table (100), and the base plate (111) limits the brake shoe support (113) by a plurality of baffles (112) set on the top.

3. The brake shoe assembly mechanism for buffer protection according to claim 2, characterized in that: When the brake shoe holder (113) is placed between multiple baffles (112), the axial direction of the shaft hole of the brake shoe holder (113) is parallel to the ground.

4. The brake shoe assembly mechanism for buffer protection according to claim 3, characterized in that: The bottom of the workpiece carrier (120) is slidably provided with a guide rod (122), and both ends of the guide rod (122) are fixed to the top of the pressing table (100) by side plates (123).

5. The brake shoe assembly mechanism for buffer protection according to claim 4, characterized in that: The drive mechanism includes a return spring (124), a locking component, and an unlocking component; The return spring (124) is disposed between the side wall of one of the side plates (123) and the workpiece carrier (120); When the workpiece (200) and the brake shoe holder (113) are coaxial, the locking member locks the workpiece carrier (120) to a fixed state; The unlocking component is used to drive the locking component to release the lock on the workpiece carrier (120) when the telescopic rod is compressed to a predetermined state.

6. The brake shoe assembly mechanism for buffer protection according to claim 5, characterized in that: The locking component includes a locking rod (130), the bottom end of which slides into the interior of the base plate (111) and the top end slides into the unlocking groove (126) inside the workpiece carrier (120). A compression spring (131) is provided between the bottom end of the locking rod (130) and the interior of the base plate (111) to elastically connect the two.

7. The brake shoe assembly mechanism for buffer protection according to claim 6, characterized in that: The bottom of the workpiece carrier (120) is provided with an avoidance groove, and the thickness between the avoidance groove and the unlocking groove (126) is less than the height of the arc-shaped structure at the top of the locking rod (130).

8. The brake shoe assembly mechanism for buffer protection according to claim 6, characterized in that: The connector (141) is fixed to the end of the movable end of the hydraulic press (101), and the end of the connector (141) facing the telescopic rod is provided with a groove (143). The opening of the groove (143) is oriented in the same direction as the direction in which the return spring (124) pulls the workpiece carrier (120) to move.

9. The brake shoe assembly mechanism for buffer protection according to claim 8, characterized in that: The telescopic rod includes a sleeve (142) and a top rod (145) that is slidably disposed inside the sleeve (142) at one end. The sleeve (142) is provided with a slider (144) that can slide into or out of the groove (143) at one end near the connector (141). A support spring (146) is provided between the top rod (145) and the inner end of the sleeve (142) to elastically connect the two.

10. The brake shoe assembly mechanism for buffer protection according to claim 9, characterized in that: The unlocking component includes a rod (147) with an inclined end. The rod (147) is fixed to the bottom of the sleeve (142) and is set in the unlocking groove (126). When the support spring (146) is compressed to a predetermined state, the rod (147) enters the unlocking groove (126) and presses the locking rod (130) to move down.

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