A device for grinding the surface of a brake guide pin of an automobile
By using a servo motor-driven transmission mechanism and limiting structure, the problem of automatic rotation and position adjustment of the guide pin is solved, enabling efficient grinding and dust removal of the guide pin and improving grinding quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TANAWORKS AUTOMOTIVE INC
- Filing Date
- 2026-03-30
- Publication Date
- 2026-07-21
AI Technical Summary
Existing automotive brake guide pin surface grinding devices are unable to automatically rotate the guide pins and cannot automatically adjust their position, resulting in wasted manpower and uneven grinding.
The transmission mechanism and limit structure driven by a servo motor drive the guide pin to rotate through the meshing of transmission gears, and fix the guide pin through the limit block and threaded connection, so as to realize the automatic rotation and position adjustment of the guide pin.
It achieves automatic rotation and position adjustment of the guide pin, improving the uniformity and efficiency of grinding, reducing labor consumption, and integrating dust collection and filtration functions.
Smart Images
Figure CN122425597A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive processing technology, and in particular to a device for grinding the surface of automotive brake guide pins. Background Technology
[0002] An automobile is a non-rail-borne vehicle driven by a power source and having four or more wheels. The automobile brake is a device used to decelerate, stop, or keep the vehicle stationary; commonly known as a brake or caliper. The brake generates resistance through friction to achieve service braking and parking braking. It mainly consists of components such as the brake frame, brake elements, and control mechanisms. The brake guide pin is a key sliding component in a disc brake system, connecting the brake caliper to the caliper mounting bracket. Its core function is to ensure that the brake pads press evenly and parallel against the brake disc during braking, preventing uneven wear, abnormal noise, or brake force loss. An automobile brake guide pin surface grinding device is a specialized piece of equipment used to grind the surface of automobile brake guide pins, aiming to improve the surface finish, dimensional accuracy, and assembly performance of the guide pins, thereby ensuring the normal operation of the braking system.
[0003] To address this, patent publication CN214445090U discloses a surface polishing device for processing guide pins of automotive brakes, comprising a base; a motor frame is mounted on the top left side of the base, a motor is mounted on the inner side above the motor frame, a polishing sleeve is mounted on the right end of the motor, and polishing wires are embedded in the inner wall of the polishing sleeve; an electric telescopic rod is mounted on the top right side of the base, a mounting bracket is mounted on the top right end of the electric telescopic rod, a clamping sleeve is mounted on the top left side of the mounting bracket, a bolt is rotatably mounted on the top of the clamping sleeve, and a clamping plate is mounted on the bottom of the bolt. This invention allows the electric telescopic rod to move the clamping sleeve and the clamped guide pin left and right, while the motor drives the polishing sleeve to rotate. When the guide pin moves to the left and inserts into the polishing sleeve, the rotating polishing wires polish the surface of the guide pin. The operation is simple and convenient, saving time and effort, and can complete polishing from all directions with good polishing quality.
[0004] The aforementioned surface grinding device for processing guide pins of automotive brakes can grind the surface of the guide pin simply by using a rotating grinding filament. It is simple and convenient to operate, saving time and effort, and can complete grinding from all directions with good grinding quality. However, when grinding the guide pin, the guide pin cannot rotate automatically, and the guide pin cannot automatically adjust to allow all surfaces to be ground. At the same time, the front and rear positions of the guide pin cannot be ground, and it cannot grind guide pins of different degrees. Manual adjustment would be a waste of manpower. Summary of the Invention
[0005] The purpose of this invention is to provide a grinding device for the surface of automotive brake guide pins, which solves the problem that existing grinding devices for automotive brake guide pins are difficult to automatically rotate the guide pins.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a grinding device for the surface of a guide pin of an automobile brake, including a support leg; A housing is mounted on the top of the support leg, and a workbench is mounted on the top of the housing. A mounting bracket is mounted on one side of the top of the workbench, and a servo motor is mounted on one side of the top of the mounting bracket. A rotating shaft is mounted on one side of the servo motor, a screw is mounted on one side of the rotating shaft, a guide pin grinding wheel is mounted on the outside of the screw, and a positioning block is mounted on one side of the screw. A support frame is installed on one side of the top of the workbench, and a transmission mechanism is installed on one side of the support frame. The transmission mechanism includes a first transmission gear installed on one side of the servo motor, and a second transmission gear is installed on the top of the first transmission gear.
[0007] In use, the screw and the positioning block form a threaded connection. Tightening the positioning block can fix the guide pin grinding wheel and make the guide pin grinding wheel replaceable. The servo motor will drive the rotating shaft to rotate, and the rotating shaft will drive the guide pin grinding wheel to rotate. The rotation of the guide pin grinding wheel can grind the guide pin. The rotation of the servo motor will also drive the guide pin to rotate. At the same time, because of the transmission of the first transmission gear and the second transmission gear, the guide pin and the guide pin grinding wheel will rotate in opposite directions, allowing the guide pin to be ground in all directions.
[0008] Furthermore, the inside of the box is equipped with a recycling structure, which includes a recycling trough installed inside the box. The bottom of the recycling trough is equipped with a discharge port, and a valve is installed on one side of the discharge port. Inclined plates are installed on both sides of the bottom of the recycling trough. The recycling structure can recycle dust and prevent dust from flying.
[0009] Furthermore, a screen is installed inside the recycling tank, and the outer diameter of the screen is smaller than the inner diameter of the recycling tank, so that the screen can filter dust.
[0010] Furthermore, the bottom of the support leg is equipped with an anti-slip pad, which is symmetrically distributed about the central axis of the box. The anti-slip pad can enhance the friction of the support leg and prevent the support leg from slipping.
[0011] Furthermore, a limiting structure is installed on one side of the support frame, and the limiting structure includes a limiting block installed on one side of the transmission mechanism. The limiting block has an internal mounting groove, and threaded grooves are provided at both the bottom and top ends of the limiting block. Guide rods pass through both the bottom and top ends of the limiting block, and a guide pin limiting plate is installed on the inner side of the guide rod. A threaded rod is installed at the top end of the guide pin limiting plate. The limiting structure can limit the guide pin and prevent the guide pin from shifting during processing.
[0012] Furthermore, the outer side wall of the threaded rod is uniformly provided with external threads, and the inner side wall of the limiting block is uniformly provided with internal threads that cooperate with the external threads. The threaded rod and the limiting block are threadedly connected. The rotation of the threaded rod will drive the guide pin limiting plate to rise and fall, so that the guide pin limiting plate can clamp the guide pin.
[0013] Furthermore, the guide rods are symmetrically distributed about the central axis of the limiting block, and the guide rods and the limiting block form a sliding structure. The guide rods can guide the guide pin limiting plate to prevent the guide pin limiting plate from deviating when it is raised or lowered.
[0014] Furthermore, a drive shaft is mounted on one side of the second transmission gear, a first transmission wheel is mounted on one side of the drive shaft, and a first transmission belt is mounted on the outer side of the first transmission wheel. A second transmission wheel is mounted on the bottom end of the first transmission belt, and a rotating shaft is mounted on one side of the second transmission wheel. A third transmission wheel is mounted on the other side of the second transmission wheel, and a second transmission belt is mounted on the outer side of the third transmission wheel. A fourth transmission wheel is mounted on the bottom end of the second transmission belt, and a connecting rod is mounted on one side of the fourth transmission wheel. A rotating block is mounted on one side of the connecting rod. The transmission structure can drive the device, so that when the guide pin grinding wheel rotates, it can simultaneously drive the guide pin to rotate.
[0015] Furthermore, a second right-angle gear is installed on one side of the rotating shaft, and a first right-angle gear is provided at the top of the second right-angle gear. A rotating rod is provided at the top of the first right-angle gear, and a second pulley is installed at the top of the rotating rod. A transmission belt is provided on the outer side of the second pulley, and a first pulley is provided on one side of the transmission belt. A drive gear is installed at the top of the first pulley, and a moving block is installed on the outer side of the drive gear. A rod is installed at the bottom of the moving block, and a positioning ring is installed at the bottom of the rod. A second telescopic rod passes through the inner side of the positioning ring, and a first telescopic rod is installed on one side of the second telescopic rod. The second telescopic rod can be moved by the transmission structure.
[0016] Furthermore, rotating fan blades are installed on the outer side of the rotating block, and the rotating fan blades are arranged at equal intervals on the outer side of the rotating block. The rotation of the rotating fan blades can generate suction, allowing dust to be sucked into the recycling tank.
[0017] The advantages of the automotive brake guide pin surface grinding device provided by the present invention are as follows: during use, the guide pin can be rotated while the transmission wheel is rotated through the transmission mechanism, so that the guide pin can be ground in all directions. The guide pin can be limited by the limiting structure to prevent the guide pin from deviating. The dust generated can be treated by the recycling structure.
[0018] By installing a first transmission gear on one side of the servo motor, and the first and second transmission gears meshing with each other, the servo motor drives the rotating shaft to rotate, which in turn drives the first transmission gear to rotate. The rotation of the first transmission gear drives the second transmission gear to rotate, which in turn drives the transmission shaft to rotate. The rotation of the transmission shaft drives the first transmission wheel to rotate, which in turn drives the second transmission wheel at the bottom to rotate via the first transmission belt. The rotation of the second transmission wheel drives the rotating shaft to rotate, which in turn drives the guide pin to rotate automatically, allowing the guide pin to be polished in all directions. At the same time, the guide pin can be moved back and forth by the transmission to perform polishing, thereby achieving the purpose of the automotive brake guide pin surface polishing device to automatically drive the guide pin for adjustment.
[0019] By providing an installation groove inside the limiting block, one side of the guide pin can be inserted into the installation groove of the limiting block. The threaded rod and the threaded groove form a threaded connection. Tightening the threaded rod can drive the guide pin limiting plate to move. The movement of the guide pin limiting plate can clamp the guide pin in the middle for limitation, preventing the guide pin from deviating during processing. The guide rod can guide the lifting and lowering of the guide pin limiting plate, thereby achieving the purpose of the automotive brake guide pin surface grinding device to automatically limit the guide pin. Attached Figure Description
[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 4 This is a partial three-dimensional structural diagram of the limiting structure of the present invention; Figure 5 This is a partial three-dimensional structural diagram of the limiting structure of the present invention; Figure 6 This is a partial three-dimensional structural diagram of the transmission mechanism of the present invention; Figure 7 This is a partial three-dimensional structural diagram of the guide pin grinding wheel of the present invention; Figure 8 This is a partial three-dimensional structural diagram of the transmission mechanism of the present invention; Figure 9 This is a partial cross-sectional three-dimensional structural schematic diagram of the transmission mechanism of the present invention.
[0021] The following are the annotations in the diagram: 1. Workbench; 2. Mounting bracket; 3. Box body; 4. Support leg; 5. Anti-slip mat; 6. Recycling structure; 601. Recycling trough; 602. Inclined plate; 603. Discharge port; 604. Valve; 605. Screen; 7. Support frame; 8. Transmission mechanism; 801. First transmission gear; 802. Second transmission gear; 803. Transmission shaft; 804. First transmission wheel; 805. Second transmission wheel; 806. First transmission belt; 807. Third transmission wheel; 808. Fourth transmission wheel; 809. Second transmission belt; 810. Connecting rod; 811. Rotating fan blade; 812. Rotating shaft; 81 3. Rotating block; 814. First telescopic rod; 815. Second telescopic rod; 816. Rod body; 817. Moving block; 818. Drive gear; 819. First pulley; 820. Second pulley; 821. Transmission belt; 822. Rotating rod; 823. First right-angle gear; 824. Second right-angle gear; 825. Positioning ring; 9. Limiting structure; 901. Mounting groove; 902. Threaded groove; 903. Limiting block; 904. Guide pin limiting plate; 905. Threaded rod; 906. Guide rod; 10. Guide pin grinding wheel; 11. Positioning block; 12. Screw; 13. Rotating shaft; 14. Servo motor. Detailed Implementation
[0022] The technical solutions of 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.
[0023] Please see Figures 1-9 One embodiment of the present invention is a grinding device for the surface of a car brake guide pin, including a support leg 4.
[0024] The top of the support leg 4 is fitted with the housing 3, and the bottom of the support leg 4 is fitted with anti-slip pads 5. The anti-slip pads 5 are symmetrically distributed about the central axis of the housing 3.
[0025] The inside of the box 3 is equipped with a recycling structure 6, and the recycling structure 6 includes a recycling trough 601 installed inside the box 3. A screen 605 is installed inside the recycling trough 601, and the outer diameter of the screen 605 is smaller than the inner diameter of the recycling trough 601.
[0026] The bottom of the recycling tank 601 is equipped with a discharge port 603, and a valve 604 is installed on one side of the discharge port 603. Inclined plates 602 are installed on both sides of the bottom of the recycling tank 601.
[0027] See attached document Figures 1-3As shown, the anti-slip pad 5 can enhance the friction of the support foot 4. The screw 12 and the positioning block 11 form a threaded connection. Tightening the positioning block 11 can fix the guide pin grinding wheel 10 and make the guide pin grinding wheel 10 replaceable. The servo motor 14 will drive the rotating shaft 13 to rotate, and the rotating shaft 13 will drive the guide pin grinding wheel 10 to rotate. The rotation of the guide pin grinding wheel 10 can grind the guide pin. At the same time, when the transmission wheel rotates, it will also drive the rotating fan blade 811 to rotate through the transmission and generate suction. The suction will suck the dust generated by grinding into the recycling tank 601 to prevent the dust from flying. The screen 605 can filter the dust to prevent the dust from adhering to the rotating fan blade 811. The valve 604 can control the opening and closing of the discharge port 603. The inclined plate 602 can concentrate the dust and facilitate its discharge through the discharge port 603. After opening the valve 604, the dust can be discharged through the discharge port 603.
[0028] A workbench 1 is mounted on the top of the housing 3. A mounting bracket 2 is mounted on one side of the top of the workbench 1, and a servo motor 14 is mounted on one side of the top of the mounting bracket 2.
[0029] A rotating shaft 13 is mounted on one side of the servo motor 14, a screw 12 is mounted on one side of the rotating shaft 13, a guide pin grinding wheel 10 is mounted on the outside of the screw 12, and a positioning block 11 is mounted on one side of the screw 12.
[0030] A support frame 7 is installed on one side of the top of the workbench 1. A limiting structure 9 is installed on one side of the support frame 7. The limiting structure 9 includes a limiting block 903 installed on one side of the transmission mechanism 8. The limiting block 903 has an installation groove 901 inside. The bottom and top ends of the limiting block 903 are provided with threaded grooves 902. Guide rods 906 pass through the bottom and top ends of the limiting block 903. The guide rods 906 are symmetrically distributed about the central axis of the limiting block 903. The guide rods 906 and the limiting block 903 constitute a sliding structure.
[0031] A guide pin limiting plate 904 is installed on the inner side of the guide rod 906. A threaded rod 905 is installed on the top of the guide pin limiting plate 904. External threads are evenly arranged on the outer side wall of the threaded rod 905. Internal threads that cooperate with the external threads are evenly arranged on the inner side wall of the limiting block 903. The threaded rod 905 and the limiting block 903 are threadedly connected.
[0032] See attached document Figures 1-5As shown, one side of the guide pin can be inserted into the mounting groove 901 inside the limiting block 903. The threaded rod 905 and the threaded groove 902 on the limiting block 903 form a threaded connection. Tightening the threaded rod 905 can drive the threaded rod 905 to rise and fall. The rise and fall of the threaded rod 905 will drive the guide pin limiting plate 904 to move and rise. The guide pin limiting plate 904 is symmetrically distributed about the central axis of the limiting block 903. The movement of the guide pin limiting plate 904 can clamp the guide pin between the two guide pin limiting plates 904 to limit the guide pin and prevent the guide pin from deviating during processing. The guide rod 906 can guide the rise and fall of the guide pin limiting plate 904 to prevent the guide pin limiting plate 904 from deviating during rise and fall.
[0033] A transmission mechanism 8 is installed on one side of the support frame 7. The transmission mechanism 8 includes a first transmission gear 801 installed on one side of the servo motor 14. The outer diameter of the first transmission gear 801 is smaller than the outer diameter of the second transmission gear 802. The first transmission gear 801 and the second transmission gear 802 mesh with each other.
[0034] A second transmission gear 802 is mounted on the top of the first transmission gear 801. A transmission shaft 803 is mounted on one side of the second transmission gear 802. A first transmission wheel 804 is mounted on one side of the transmission shaft 803. A first transmission belt 806 is mounted on the outer side of the first transmission wheel 804. A second transmission wheel 805 is mounted on the bottom end of the first transmission belt 806. A rotating shaft 812 is mounted on one side of the second transmission wheel 805. A second right-angle gear 824 is mounted on one side of the rotating shaft 812. A first right-angle gear 823 is provided at the top of the second right-angle gear 824. A first right-angle gear 823 is provided at the top of the first right-angle gear 823. A rotating rod 822 is provided, with a second pulley 820 mounted at its top. A transmission belt 821 is provided on the outer side of the second pulley 820. A first pulley 819 is provided on one side of the transmission belt 821. A drive gear 818 is mounted at the top of the first pulley 819. A moving block 817 is mounted on the outer side of the drive gear 818. A rod body 816 is mounted at the bottom end of the moving block 817. A positioning ring 825 is mounted at the bottom end of the rod body 816. A second telescopic rod 815 passes through the inner side of the positioning ring 825. A first telescopic rod 814 is mounted on one side of the second telescopic rod 815.
[0035] A third transmission wheel 807 is installed on the other side of the second transmission wheel 805. A second transmission belt 809 is installed on the outer side of the third transmission wheel 807. A fourth transmission wheel 808 is installed at the bottom end of the second transmission belt 809. A connecting rod 810 is installed on one side of the fourth transmission wheel 808. A rotating block 813 is installed on one side of the connecting rod 810. A rotating fan blade 811 is installed on the outer side of the rotating block 813. The rotating fan blades 811 are arranged at equal intervals on the outer side of the rotating block 813.
[0036] See attached document Figures 1-3and attached Figures 7-8As shown, the first transmission gear 801 and the second transmission gear 802 mesh with each other. When the servo motor 14 drives the rotating shaft 13 to rotate, it also drives the first transmission gear 801 to rotate. The rotation of the first transmission gear 801 drives the second transmission gear 802 to rotate, and the rotation of the second transmission gear 802 drives the transmission shaft 803 to rotate. The outer diameter of the first transmission gear 801 is much smaller than the outer diameter of the second transmission gear 802. The high-speed rotation of the first transmission gear 801 is slowed down by the second transmission gear 802. Then, the rotation of the transmission shaft 803 drives the first transmission wheel 804 to rotate. The outer diameter of the first transmission wheel 804 is smaller than the outer diameter of the second transmission wheel 805. The second transmission wheel 805 can slow down the rotation again. The rotation of the first transmission wheel 804 will... The first transmission belt 806 drives the second transmission wheel 805 at the bottom to rotate. The rotation of the second transmission wheel 805 drives the rotating shaft 812 to rotate, which in turn drives the first telescopic rod 814 and the second telescopic rod 815 to rotate. Simultaneously, the rotation of the rotating shaft 812 drives the limiting guide pin to rotate automatically. The positioning ring 825 is fitted over the outside of the second telescopic rod 815 and is limited by a baffle on the second telescopic rod 815. The movement of the positioning ring 825 also drives the second telescopic rod 815 to move. The inner diameter of the positioning ring 825 is larger than the outer diameter of the second telescopic rod 815, allowing the second telescopic rod 815 to rotate. The rotation of the rotating shaft 812 drives the second right-angle gear 824 to rotate, which in turn drives the first telescopic rod 814 and the second telescopic rod 815 to rotate. The rotation of right-angle gear 823 drives the rotation of rotating rod 822, which in turn drives the rotation of the second pulley 820 at the top. The rotation of the second pulley 820, via transmission belt 821, drives the rotation of the first pulley 819 on the other side. The rotation of the first pulley 819 drives the rotation of the drive gear 818 at the top. The drive gear 818 and the teeth inside the moving block 817 mesh with each other. Since the drive gear 818 only has teeth on one side, it can drive the moving block 817 to move reciprocally. The movement of the moving block 817 drives the rod 816 to move. The bottom of the protective shell on the outer side of the rod 816 has a groove that allows the rod 816 to slide. The rod 816 can be moved by the positioning ring 82. 5 drives the second telescopic rod 815 to reciprocate, which in turn drives the guide pin to reciprocate, causing the guide pin to rotate and reciprocate, allowing for grinding at various positions on the guide pin and improving the grinding effect. Simultaneously, the rotation of the servo motor 14 also drives the guide pin to rotate and move. Because of the transmission between the first transmission gear 801 and the second transmission gear 802, the guide pin and the guide pin grinding wheel 10 rotate in opposite directions, allowing for grinding of the guide pin in all directions. The rotation of the second transmission wheel 805 simultaneously drives the third transmission wheel 807 to rotate. The third transmission wheel 807, through the second transmission belt 809, drives the fourth transmission wheel 808 to rotate. The outer diameter of the fourth transmission wheel 808 is smaller than that of the third transmission wheel 807.The fourth transmission wheel 808 accelerates the rotation speed. The rotation of the fourth transmission wheel 808 drives the connecting rod 810 to rotate, which in turn drives the rotating block 813 to rotate. The rotating block 813 then drives the rotating fan blades 811 to rotate. The rotating fan blades 811 generate suction, which draws dust into the collection tank 601.
[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A device for grinding the surface of a guide pin of an automobile brake, comprising a support leg (4). Its features are: The top of the support leg (4) is fitted with a housing (3), and the top of the housing (3) is fitted with a workbench (1). A mounting bracket (2) is fitted on one side of the top of the workbench (1), and a servo motor (14) is fitted on one side of the top of the mounting bracket (2). A rotating shaft (13) is installed on one side of the servo motor (14), a screw (12) is installed on one side of the rotating shaft (13), a guide pin grinding wheel (10) is installed on the outside of the screw (12), and a positioning block (11) is installed on one side of the screw (12). A support frame (7) is installed on one side of the top of the workbench (1), and a transmission mechanism (8) is installed on one side of the support frame (7). The transmission mechanism (8) includes a first transmission gear (801) installed on one side of the servo motor (14), and a second transmission gear (802) is installed on the top of the first transmission gear (801).
2. The device for grinding the surface of a guide pin of an automobile brake according to claim 1, characterized in that: The box (3) is equipped with a recycling structure (6), and the recycling structure (6) includes a recycling trough (601) installed inside the box (3). The bottom end of the recycling trough (601) is equipped with a discharge port (603), and a valve (604) is installed on one side of the discharge port (603). Inclined plates (602) are installed on both sides of the bottom end of the recycling trough (601).
3. The device for grinding the surface of a guide pin of an automobile brake according to claim 2, characterized in that: The recycling tank (601) is equipped with a screen (605) inside, and the outer diameter of the screen (605) is smaller than the inner diameter of the recycling tank (601).
4. The device for grinding the surface of a guide pin of an automobile brake according to claim 1, characterized in that: The bottom of the support leg (4) is equipped with an anti-slip pad (5), and the anti-slip pad (5) is symmetrically distributed about the central axis of the box body (3).
5. The device for grinding the surface of a guide pin of an automobile brake according to claim 1, characterized in that: A limiting structure (9) is installed on one side of the support frame (7), and the limiting structure (9) includes a limiting block (903) installed on one side of the transmission mechanism (8). The limiting block (903) has an installation groove (901) inside. The bottom and top ends of the limiting block (903) are provided with threaded grooves (902). The bottom and top ends of the limiting block (903) are both penetrated by guide rods (906). A guide pin limiting plate (904) is installed on the inner side of the guide rod (906). A threaded rod (905) is installed on the top end of the guide pin limiting plate (904).
6. The device for grinding the surface of a guide pin of an automobile brake according to claim 5, characterized in that: The threaded rod (905) has external threads uniformly arranged on its outer side wall, and the limiting block (903) has internal threads uniformly arranged on its inner side wall that cooperate with the external threads. The threaded rod (905) and the limiting block (903) are threadedly connected.
7. The device for grinding the surface of a guide pin of an automobile brake according to claim 5, characterized in that: The guide rod (906) is symmetrically distributed about the central axis of the limiting block (903), and the guide rod (906) and the limiting block (903) constitute a sliding structure.
8. The device for grinding the surface of a guide pin of an automobile brake according to claim 1, characterized in that: A drive shaft (803) is mounted on one side of the second drive gear (802), a first drive wheel (804) is mounted on one side of the drive shaft (803), a first drive belt (806) is mounted on the outer side of the first drive wheel (804), a second drive wheel (805) is mounted on the bottom end of the first drive belt (806), a rotating shaft (812) is mounted on one side of the second drive wheel (805), a third drive wheel (807) is mounted on the other side of the second drive wheel (805), a second drive belt (809) is mounted on the outer side of the third drive wheel (807), a fourth drive wheel (808) is mounted on the bottom end of the second drive belt (809), a connecting rod (810) is mounted on one side of the fourth drive wheel (808), and a rotating block (813) is mounted on one side of the connecting rod (810).
9. The device for grinding the surface of a guide pin of an automobile brake according to claim 8, characterized in that: A second right-angle gear (824) is installed on one side of the rotating shaft (812), and a first right-angle gear (823) is provided at the top of the second right-angle gear (824). A rotating rod (822) is provided at the top of the first right-angle gear (823). A second pulley (820) is installed at the top of the rotating rod (822). A transmission belt (821) is provided on the outside of the second pulley (820). A first pulley (819) is provided on one side of the transmission belt (821). A drive gear (818) is installed at the top of the first pulley (819). A moving block (817) is installed on the outside of the drive gear (818). A rod body (816) is installed at the bottom of the moving block (817). A positioning ring (825) is installed at the bottom of the rod body (816). A second telescopic rod (815) passes through the inner side of the positioning ring (825). A first telescopic rod (814) is installed on one side of the second telescopic rod (815).
10. The device for grinding the surface of a guide pin of an automobile brake according to claim 8, characterized in that: Rotating fan blades (811) are installed on the outside of the rotating block (813), and the rotating fan blades (811) are arranged at equal intervals on the outside of the rotating block (813).