A multi-directional machining system for a toolroom lathe

Abstract

The present application relates to the field of tool path lathe, disclose a kind of multi-direction processing system for tool path lathe, including: frame, for supporting overall device, the inner wall of the frame is equipped with main shaft, the upper surface of the frame is equipped with frame, the upper surface of the frame is equipped with moving lathe tool;Lateral processing mechanism, is set to the upper surface of the frame away from the side of moving lathe tool;Opposite processing mechanism, is set to the upper surface of the frame away from the side of main shaft, for processing and can drive workpiece moves, the opposite processing mechanism includes moving track one, the upper end of the output shaft of moving track one is equipped with moving track two.In the present application, by setting sub-shaft assembly in object processing mechanism, when processing, workpiece can be pulled out of main shaft inside using sub-shaft, then lathe tool can be used to cut workpiece, then workpiece can be driven to approach power head three by sub-shaft to realize the processing of shielding area.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tool-path lathe, and particularly relates to a multi-directional processing system for tool-path lathe. BACKGROUND

[0002] The tool-path lathe is a relatively traditional type of lathe, and its processing operation mainly relies on the movement of a tool to realize the cutting processing of a workpiece. When processing, the workpiece is directly installed on a main shaft and is driven to rotate by the main shaft, and the tool is installed on a tool holder and is moved longitudinally, transversely or obliquely by the tool holder to cut the rotating workpiece.

[0003] In the prior art, when the tool-path lathe works, the main shaft not only drives the workpiece to move, but also serves to fix the workpiece. Therefore, when the workpiece is processed, the position where the workpiece and the main shaft contact each other cannot be processed. If the bar stock is pushed out too much, the originally blocked area can be processed, but the workpiece is prone to bending during processing. Therefore, when bidirectional processing is performed, the workpiece often needs to be cut off first and then processed again, which is inconvenient and time-consuming during processing. Therefore, a multi-directional processing system for tool-path lathe is proposed to solve the above problems. SUMMARY

[0004] In order to make up for the above shortcomings, the present application provides a multi-directional processing system for tool-path lathe, which aims to improve the problem that the part of the workpiece coinciding with the main shaft needs to be processed again during processing, which is inconvenient and time-consuming.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: a multi-directional processing system for tool-path lathe, comprising:

[0006] The frame is used for supporting the whole device, the inner wall of the frame is provided with a main shaft, the upper surface of the frame is provided with a frame body, and the upper surface of the frame is provided with a mobile tool; the lateral machining mechanism is arranged on the upper surface of the frame away from the mobile tool; the opposite machining mechanism is arranged on the upper surface of the frame away from the main shaft and is used for machining the workpiece and can drive the workpiece to move, the opposite machining mechanism comprises a moving track one, the upper end of the output shaft of the moving track one is provided with a moving track two, the upper end of the output shaft of the moving track two is provided with a support frame, the support frame is arranged as a triangular support, the triangular inclined end of the support frame is provided with a moving track three, the upper surface of the output shaft of the moving track three is sequentially provided from top to bottom with a power head one, a fixed tool rest and a sub-shaft assembly; the power head three is arranged on the upper surface of the frame close to the front end position; the sub-shaft assembly comprises a rotating shaft, the rotating shaft is rotatably connected to the upper end of the output shaft of the moving track three, the left end of the rotating shaft is fixedly connected with a fixed head, and the inner wall of the fixed head is provided with a clamping sleeve; the lateral machining mechanism comprises an adjusting track one, the adjusting track one is arranged on the upper surface of the frame, the upper surface of the output shaft of the adjusting track one is provided with an adjusting track two, the upper surface of the output shaft of the adjusting track two is provided with an adjusting track three, and the transmission directions of the adjusting track three, the adjusting track two and the adjusting track one are perpendicular to each other.

[0007] As a further description of the above technical scheme: the inner wall of the rotating shaft is slidably connected with a transmission sleeve, the left end of the inner wall of the rotating shaft close to the transmission sleeve is slidably connected with an extrusion sleeve, and the left end of the clamping sleeve is arranged as a hollow conical frustum and the outer wall is provided with a hollow groove.

[0008] As a further description of the above technical scheme: the outer wall of the rotating shaft is slidably connected with a conical sleeve, the outer wall of the rotating shaft is rotatably connected with a swing clamp, and the upper and lower ends of the swing clamp are respectively attached to the outer wall of the conical sleeve and the right end of the transmission sleeve.

[0009] As a further description of the above technical scheme: the upper surface of the output shaft of the moving track three is provided with a clamping cylinder, the outer wall of the output shaft of the clamping cylinder is rotatably connected with a swing frame, the swing frame is rotatably connected to the upper surface of the output shaft of the moving track three, and the end of the swing frame away from the clamping cylinder is slidably connected to the outer wall of the conical sleeve.

[0010] As a further description of the above technical scheme: the upper surface of the output shaft of the moving track three is provided with a driving motor, the outer wall of the rotating shaft is fixedly connected with a transmission wheel, the output shaft of the driving motor is drivingly connected with the transmission wheel through a synchronous belt, and the upper end of the output shaft of the moving track three is provided with a brake cylinder.

[0011] As the further description of the above technical scheme: the right surface of the adjusting track three output shaft is fixedly connected with a mounting plate, the right surface of the mounting plate is installed with a power head two, the lower part of the right surface of the mounting plate close to the power head two is installed with a speed reducer motor, and the output shaft of the speed reducer motor is fixedly connected with the lower surface of the power head two.

[0012] As the further description of the above technical scheme: the right surface of the mounting plate is provided with a brake assembly, the brake assembly comprises a rotating seat, the rotating seat is fixedly connected with the right surface of the mounting plate close to the upper part of the power head two, the inner wall of the rotating seat is rotatably connected with a rotating shaft, and the lower surface of the rotating shaft is fixedly connected with the upper surface of the power head two.

[0013] As the further description of the above technical scheme: the right surface of the mounting plate close to the rear part of the brake assembly is installed with a brake push rod, the upper surface of the rotating seat is installed with a cover plate, and the right surface of the mounting plate close to the upper part of the cover plate is installed with a positioning frame.

[0014] The present application has the following beneficial effects:

[0015] 1、In the present application, by setting the auxiliary shaft assembly in the object machining mechanism, when machining, the workpiece can be pulled out of the main shaft by the auxiliary shaft, then the workpiece can be cut off by the turning tool, then the workpiece can be driven by the auxiliary shaft to approach the power head three to realize the machining of the shielding area, and the power head one and the fixed tool rest arranged in the machining mechanism can machine the workpiece clamped on the main shaft, so that the whole device is convenient and time-saving during machining.

[0016] 2、In the present application, by setting the driving motor, when changing the shaft clamping, the driving motor can be started to drive the rotating shaft to rotate, when the rotating speed of the rotating shaft is the same as the rotating speed of the main shaft, the clamping of the workpiece can be realized without stopping the main shaft, so that the time waste caused by the stopping of the main shaft can be eliminated, and the machining efficiency can be further improved.

[0017] 3、In the present application, by setting the lateral machining mechanism, when machining, the lateral machining mechanism can be used to machine the side surface of the workpiece, and the inclination angle of the power head two can be adjusted by the speed reducer, so that holes with different angles can be machined, and when the angle of the power head two does not need to be adjusted, the power head two can be kept stationary by extruding the rotating shaft by the brake push rod, so that the power head two has good stability during work. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the whole device in the present application;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the lateral machining mechanism in the present application;

[0020] Figure 3 Figure 3 is a schematic diagram of the three-dimensional structure of the second power head in the present application;

[0021] Figure 4 Figure 4 is a schematic diagram of the three-dimensional structure of the opposite machining mechanism in the present application;

[0022] Figure 5 Figure 5 is a schematic diagram of the three-dimensional structure of the auxiliary shaft assembly in the present application;

[0023] Figure 6 Figure 6 is a schematic diagram of the three-dimensional structure of the auxiliary shaft assembly in the present application;

[0024] Figure 7 Figure 7 is a schematic diagram of the three-dimensional structure of the auxiliary shaft assembly in the present application; Figure 1 Figure 8 is a schematic diagram of the three-dimensional structure of the auxiliary shaft assembly in the present application;

[0025] Figure 9 is a schematic diagram of the three-dimensional structure of the auxiliary shaft assembly in the present application;

[0026] 1, frame; 2, frame body; 3, moving tool; 4, opposite machining mechanism; 41, moving track one; 42, moving track two; 43, support frame; 44, moving track three; 45, first power head; 46, fixed tool holder; 47, auxiliary shaft assembly; 471, fixed head; 472, rotating shaft; 473, clamping sleeve; 474, clamping cylinder; 475, swing frame; 476, conical sleeve; 477, transmission wheel; 478, drive motor; 479, brake cylinder; 4710, swing clamp; 4711, extrusion sleeve; 4712, transmission sleeve; 5, lateral machining mechanism; 51, adjusting track one; 52, adjusting track two; 53, adjusting track three; 54, mounting plate; 55, positioning frame; 56, brake assembly; 561, cover plate; 562, rotating seat; 563, rotating shaft; 564, brake push rod; 57, second power head; 58, speed reducer motor; 6, third power head. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] With reference to Figure 1 , Figure 4 and Figure 7 , an embodiment provided by the present application is a multi-directional machining system for a tool-moving lathe, comprising:

[0029] The frame 1 is used for supporting the whole device, the inner wall of the frame 1 is provided with a main shaft which can be actively rotated and is equipped with a pushing assembly so as to push the bar to realize continuous processing, the upper surface of the frame 1 is provided with a frame body 2, and the upper surface of the frame 1 is provided with a plurality of moving turning tools 3, the moving turning tools 3 are arranged in multiple groups and are arranged in a rotating array, each group of the moving turning tools 3 can be equipped with different sizes and different types of tool heads, so that a plurality of different processing tasks can be completed;

[0030] The lateral processing mechanism 5 is arranged on the side of the upper surface of the frame 1 away from the moving turning tools 3, and the lateral processing mechanism 5 can process the side surface of the exposed part of the workpiece;

[0031] The opposite processing mechanism 4 is arranged on the side of the upper surface of the frame 1 away from the main shaft, is used for processing the workpiece and can drive the workpiece to move, and comprises a moving track one 41 which is parallel to the frame 1 and has an output shaft which can drive the workpiece to move in parallel, the upper end of the output shaft of the moving track one 41 is provided with a moving track two 42 which is also horizontally driven and has a transmission track which is perpendicular to the transmission track of the moving track one 41, the upper end of the output shaft of the moving track two 42 is provided with a support frame 43 which is arranged in a triangular shape, the support frame 43 is arranged in an isosceles right triangle, one end of the right angle of the support frame 43 is connected with the output shaft of the moving track two 42, the support frame 43 is arranged in an inclined shape, so that the components arranged above the support frame 43 can avoid other tools during work, the inclined end of the support frame 43 is provided with a moving track three 44, the transmission track of the moving track three 44 is coplanar with the transmission track of the moving track two 42, the upper surface of the output shaft of the moving track three 44 is sequentially provided from top to bottom with a power head one 45, a fixed tool holder 46 and a sub-shaft assembly 47, the power head one 45 is a processing device which is composed of a plurality of tool heads and a group of motors, a plurality of tool heads can be driven to work simultaneously by the group of motors, since the power head one 45 is prior art and can be realized by the person skilled in the art, the present case will not be described in detail, the fixed tool holder 46 itself cannot move, and a plurality of static tool heads are arranged in the fixed tool holder 46, when the main shaft rotates to approach the tool heads, the processing can be realized;

[0032] The power head three 6 is arranged on the upper surface of the frame 1 close to the front end position, when the workpiece is located in the sub-shaft assembly 47, the workpiece can be driven to approach the power head three 6 by the sub-shaft assembly 47 to realize the shielding end processing.

[0033] Reference Figures 4-6, the auxiliary shaft assembly 47 comprises a rotating shaft 472 for driving the workpiece to rotate, the rotating shaft 472 is rotatably connected to the upper end of the output shaft of the moving track three 44, the rotating shaft 472 can be driven to tilt and move by adjusting the moving track three 44, the left end of the rotating shaft 472 is fixedly connected with a fixed head 471 for closing the opening at the left end of the rotating shaft 472, the inner wall of the fixed head 471 is provided with a clamping sleeve 473, the inner wall of the rotating shaft 472 is slidably connected with a transmission sleeve 4712 for transmitting motion, the left end of the rotating shaft 472 is slidably connected with an extrusion sleeve 4711, the left end of the clamping sleeve 473 is provided with a hollow conical frustum, and the outer wall of the clamping sleeve 473 is provided with a hollow groove, when the extrusion sleeve 4711 moves to the left, it can force the left end of the clamping sleeve 473 to close inward by extruding the clamping sleeve 473, so that the workpiece can be clamped.

[0034] Referring to Figures 4-6 , the outer wall of the rotating shaft 472 is slidably connected with a conical sleeve 476 for extruding the swing clamp 4710, the outer wall of the rotating shaft 472 is rotatably connected with the swing clamp 4710 for pushing the transmission sleeve 4712, the upper and lower ends of the swing clamp 4710 are respectively attached to the outer wall of the conical sleeve 476 and the right end of the transmission sleeve 4712, when the conical sleeve 476 moves to the right, it will extrude the swing clamp 4710 to make it rotate, so that the swing clamp 4710 can extrude the transmission sleeve 4712, when the transmission sleeve 4712 is extruded, it will move to the left to extrude the extrusion sleeve 4711, the upper surface of the output shaft of the moving track three 44 is provided with a clamping air cylinder 474, the outer wall of the output shaft of the clamping air cylinder 474 is rotatably connected with a swing frame 475, the output shaft of the swing air cylinder 474 can be driven to move by starting the swing air cylinder 474, so that the lower end of the swing frame 475 can be moved, the swing frame 475 is rotatably connected to the upper surface of the output shaft of the moving track three 44, when the lower end of the swing frame 475 rotates, the upper end will be forced to rotate in the opposite direction, the end of the swing frame 475 away from the clamping air cylinder 474 is slidably connected to the outer wall of the conical sleeve 476, the end of the swing frame 475 close to the outer wall of the conical sleeve 476 is provided with an extrusion wheel, so that when the end of the swing frame 475 close to the conical sleeve 476 rotates, it can drive the conical sleeve 476 to move left and right through the extrusion wheel, the upper surface of the output shaft of the moving track three 44 is provided with a drive motor 478, the outer wall of the rotating shaft 472 is fixedly connected with a transmission wheel 477, when the transmission wheel 477 rotates, it will drive the rotating shaft 472 to rotate synchronously, the output shaft of the drive motor 478 and the transmission wheel 477 are drivingly connected through a synchronous belt, the transmission wheel 477 can be rotated by starting the drive motor 478, the upper end of the output shaft of the moving track three 44 is provided with a brake air cylinder 479.

[0035] Referring to Figures 1-3, the lateral processing mechanism 5 comprises an adjusting track one 51 installed on the upper surface of the rack 1, the conveying track of the adjusting track one 51 is left-right direction, the upper surface of the output shaft of the adjusting track one 51 is installed with an adjusting track two 52, the conveying track of the adjusting track two 52 is front-back direction, the upper surface of the output shaft of the adjusting track two 52 is installed with an adjusting track three 53, the driving directions of the adjusting track three 53, the adjusting track two 52 and the adjusting track one 51 are perpendicular to each other, in this way, the adjusting track three 53, the adjusting track two 52 and the adjusting track one 51 can be used to move the articles up and down, left and right, and front and back in the space, the right surface of the output shaft of the adjusting track three 53 is fixedly connected with a mounting plate 54 used for supporting and installing other devices, the right surface of the mounting plate 54 is installed with a power head two 57, which can be used for machining the workpiece in the main shaft, the lower part of the right surface of the mounting plate 54 close to the power head two 57 is installed with a speed reducer motor 58, the output shaft of the speed reducer motor 58 is fixedly connected with the lower surface of the power head two 57, the power head two 57 can be driven to rotate by adjusting the speed reducer motor 58, in this way, the machining angle can be changed.

[0036] Referring to Figures 1-3 , the right surface of the mounting plate 54 is provided with a brake assembly 56 used for limiting the rotation of the power head two 57, the brake assembly 56 comprises a rotating seat 562 used for supporting a rotating shaft 563, the rotating seat 562 is fixedly connected with the right surface of the mounting plate 54 above the power head two 57, the inner wall of the rotating seat 562 is rotatably connected with the rotating shaft 563, the rotating shaft 563 can rotate in the rotating seat 562, the lower surface of the rotating shaft 563 is fixedly connected with the upper surface of the power head two 57, when the power head two 57 rotates, it will drive the rotating shaft 563 to rotate synchronously, in this way, when the rotating shaft 563 is fixed, the power head two 57 will not continue to rotate, the right surface of the mounting plate 54 close to the rear of the brake assembly 56 is installed with a brake push rod 564, the output shaft of the brake push rod 564 can be extruded to the rotating shaft 563 by starting the brake push rod 564, in this way, the rotating shaft 563 can be forced to be stationary, at this time, the power head two 57 will also be limited to not rotate, in this way, the power head two 57 can be prevented from rotating randomly when working, the upper surface of the rotating seat 562 is installed with a cover plate 561, the right surface of the mounting plate 54 close to the upper part of the cover plate 561 is installed with a positioning frame 55, the positioning frame 55 can provide positioning for the installation of the rotating seat 562 and the cover plate 561.

[0037] Working principle: the opposite processing mechanism 4 drives the triangular support frame 43 and the upper assembly to adjust the position through the horizontal cooperation of the moving track one 41 and the moving track two 42, so that the power head one 45, the fixed tool rest 46 and the secondary shaft assembly 47 are aligned with the workpiece clamped by the main shaft, during processing, the power head one 45 drives a plurality of cutters to rotate, and the static cutter of the fixed tool rest 46 is used to cut the exposed area of the workpiece.

[0038] The core function of the auxiliary shaft assembly 47 is to realize workpiece switching when the main shaft is not stopped. When the workpiece needs to be clamped, the driving motor 478 adjusts the rotating shaft 472 speed through the transmission wheel 477 to make it synchronous with the main shaft, avoiding friction damage between the workpiece and the clamp sleeve 473 due to speed difference. During clamping, the swing frame 475 converts linear motion into rotary motion of the swing clamp 4710 through the taper surface structure of the cone sleeve 476, and then pushes the transmission sleeve 4712 and the extrusion sleeve 4711 to move axially. By using the hollow taper structure of the clamp sleeve 473 and the design of the outer wall slot, self-adaptive clamping of workpieces with different diameters is realized. When the workpiece shielding part needs to be machined by the power head three 6, the brake cylinder 479 can be started to fix the rotating shaft 472 to prevent it from shaking, ensuring the stability of the workpiece during transfer.

[0039] The lateral machining mechanism 5 moves the mounting plate 54 and the power head two 57 to the side machining position of the workpiece by adjusting the three-dimensional vertical transmission of the rails one 51, two 52 and three 53. The speed reducer motor 58 drives the power head two 57 to rotate around the rotating shaft 563, which can adjust the tool inclination angle to meet the machining requirements of different angle holes or inclined surfaces. When the angle is determined, the brake push rod 564 is extended and extruded on the rotating shaft 563 to fix the rotating shaft 563 through friction, so that the power head two 57 maintains a stable posture to avoid angle deviation caused by vibration during machining. The positioning frame 55 and the rotating seat 562 provide support for the rotating shaft 563 to ensure the accuracy of angle adjustment. Combined with the multi-tool synchronous rotation function of the power head two 57, efficient machining of the side of the workpiece is realized.

[0040] Finally, it should be noted that the above-described only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application have been described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A multi-directional machining system for a turning machine, characterized by, Include: Frame (1) for supporting the whole device, the inner wall of the frame (1) is installed with the main shaft, the upper surface of the frame (1) is installed with the frame (2), the upper surface of the frame (1) is installed with the moving tool (3); Lateral processing mechanism (5) is arranged on the upper surface of the frame (1) away from the moving tool (3) side; Opposite processing mechanism (4) is arranged on the upper surface of the frame (1) away from the main shaft side, which is used for processing workpiece and can drive the workpiece to move, the opposite processing mechanism (4) includes moving track one (41), the upper end of the output shaft of the moving track one (41) is installed with moving track two (42), the upper end of the output shaft of the moving track two (42) is installed with support frame (43), the support frame (43) is arranged as a triangular support, the triangular inclined end of the support frame (43) is installed with moving track three (44), the upper surface of the output shaft of the moving track three (44) is sequentially installed from top to bottom with power head one (45), fixed tool holder (46) and sub shaft assembly (47); Power head three (6) is arranged on the upper surface of the frame (1) near the front end position; The sub shaft assembly (47) includes rotating shaft (472), the rotating shaft (472) is rotatably connected to the upper end of the output shaft of the moving track three (44), the left end of the rotating shaft (472) is fixedly connected with the fixed head (471), the inner wall of the fixed head (471) is installed with the jacket (473); The lateral processing mechanism (5) includes adjusting track one (51), the adjusting track one (51) is installed on the upper surface of the frame (1), the upper surface of the output shaft of the adjusting track one (51) is installed with adjusting track two (52), the upper surface of the output shaft of the adjusting track two (52) is installed with adjusting track three (53), the transmission direction of the adjusting track three (53), the adjusting track two (52) and the adjusting track one (51) is perpendicular to each other.

2. A multi-directional machining system for a CNC lathe according to claim 1, characterized in that: The inner wall of the rotating shaft (472) is slidably connected with the transmission sleeve (4712), the left end of the inner wall of the rotating shaft (472) is slidably connected with the extrusion sleeve (4711) close to the transmission sleeve (4712), the left end of the jacket (473) is arranged as a hollow conical frustum and the outer wall is provided with a groove.

3. A multi-directional machining system for a CNC lathe according to claim 2, wherein: The outer wall of the rotating shaft (472) is slidably connected with the conical sleeve (476), the outer wall of the rotating shaft (472) is rotatably connected with the swing clamp (4710), the upper and lower ends of the swing clamp (4710) are respectively fitted with the outer wall of the conical sleeve (476) and the right end of the transmission sleeve (4712).

4. A multi-directional machining system for a CNC lathe according to claim 3, wherein: The upper surface of the output shaft of the moving track three (44) is installed with the clamping cylinder (474), the outer wall of the output shaft of the clamping cylinder (474) is rotatably connected with the swing frame (475), the swing frame (475) is rotatably connected to the upper surface of the output shaft of the moving track three (44), the end of the swing frame (475) away from the clamping cylinder (474) is slidably connected to the outer wall of the conical sleeve (476).

5. A multi-directional machining system for a CNC lathe according to claim 4, wherein: The upper surface of the moving track three (44) output shaft is installed with a driving motor (478), the outer wall of the rotating shaft (472) is fixedly connected with a transmission wheel (477), the output shaft of the driving motor (478) is in transmission connection with the transmission wheel (477) through a synchronous belt, and the upper end of the moving track three (44) output shaft is installed with a brake cylinder (479).

6. A multi-directional machining system for a CNC lathe according to claim 1, characterized in that: The right surface of the adjusting track three (53) output shaft is fixedly connected with a mounting plate (54), the right surface of the mounting plate (54) is installed with a power head two (57), the right surface of the mounting plate (54) is installed with a speed reducing motor (58) below the power head two (57), and the output shaft of the speed reducing motor (58) is fixedly connected to the lower surface of the power head two (57).

7. A multi-directional machining system for a CNC lathe according to claim 6, wherein: The right surface of the mounting plate (54) is provided with a brake assembly (56), the brake assembly (56) comprises a rotating seat (562), the rotating seat (562) is fixedly connected to the right surface of the mounting plate (54) above the power head two (57), the inner wall of the rotating seat (562) is rotatably connected with a rotating shaft (563), and the lower surface of the rotating shaft (563) is fixedly connected to the upper surface of the power head two (57).

8. A multi-directional machining system for a CNC lathe according to claim 7, wherein: The right surface of the mounting plate (54) is installed with a brake push rod (564) behind the brake assembly (56), the upper surface of the rotating seat (562) is installed with a cover plate (561), and the right surface of the mounting plate (54) is installed with a positioning frame (55) above the cover plate (561).

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