A device for machining the working surface of a brake pad

Abstract

The utility model relates to brake pad polishing technical field, especially a kind of brake pad working surface processing device, including polishing mechanism, positioning plate, several brake pad positioning slots of annular distribution are set up on the positioning plate, polishing mechanism includes planetary gear assembly, the lifting mechanism that can drive planetary gear assembly up and down movement, the planetary gear assembly includes the planetary gear that can autorotation and revolve around sun gear, planetary gear is coaxially fixed with polishing disc by transmission rod, when polishing, the sun gear and brake pad positioning slot coaxial line arrangement.This device is driven planetary gear by sun gear and realizes the circumferential polishing mode of autorotation plus revolution, so that polishing disc can evenly cover brake pad working surface, compared with the linear contact type round roller polishing mode in background art effectively avoids the problem that the polishing amount difference of middle and both ends of polishing disc is big.This device can reduce the processing deviation caused by uneven wear, improve the processing quality and utilization of brake pad working surface.

Description

Technical Field

[0001] This utility model relates to the field of brake pad grinding technology, and in particular to a brake pad working surface processing device. Background Technology

[0002] After the brake pads are formed, they need to be polished. The purpose of polishing the working surface of the brake pads is mainly to improve braking performance and product appearance quality.

[0003] The applicant previously disclosed a grinding device for the working surface of automotive brake pads, publication number: CN219704528U, which uses a cylindrical roller for grinding. However, this method still has some problems: [Reference] Figure 1 Brake pads are generally designed in an arc shape to fit the brake disc. When the brake pad passes the grinding roller, the middle part of the grinding roller has a large contact area and a long contact time with the brake pad, while the two ends of the grinding roller have a small contact area and a short contact time with the brake pad. This results in a large difference in wear between the two ends and the middle of the grinding roller after long-term use. Utility Model Content

[0004] The purpose of this utility model is to solve the problems pointed out in the background art by proposing a brake pad working surface processing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A brake pad working surface processing device includes a grinding mechanism and a positioning plate. The positioning plate has a plurality of brake pad positioning grooves arranged in a ring. The grinding mechanism includes a planetary gear assembly and a lifting mechanism that can drive the planetary gear assembly to move up and down. The planetary gear assembly includes planetary gears that can rotate on their own axis and revolve around a sun gear. The planetary gears are coaxially fixed to a grinding disc through a transmission rod. During grinding, the sun gear and the brake pad positioning groove are arranged on the same axis.

[0007] The planetary gear assembly includes a meshing gear ring, multiple planetary gears, and a sun gear. The multiple planetary gears are connected by a planet carrier. The sun gear is fixedly connected to a drive shaft, which is driven by a rotary motor. A support frame is fixedly connected to the top of the gear ring. The support frame is fixedly assembled with the lifting end of the lifting mechanism. The rotary motor is fixedly assembled with the lifting end of the lifting mechanism.

[0008] A guide rod is provided between the support frame and the ground or the machine frame.

[0009] The support frame is rotatably connected to the power shaft.

[0010] The planetary carrier is rotatably connected to the power shaft.

[0011] The processing device also includes a conveyor that runs across the underside of the grinding mechanism, and the positioning plate is mounted on the conveyor.

[0012] The brake pad working surface processing device proposed in this utility model has the following advantages: This device uses a sun gear to drive planetary gears to achieve a circular grinding method of rotation and revolution, enabling the grinding disc to uniformly cover the brake pad working surface. Compared with the linear contact roller grinding method in the prior art, this effectively avoids the problem of large differences in grinding amount between the middle and both ends of the grinding disc. This device can reduce processing deviations caused by uneven wear and improve the processing quality and utilization rate of the brake pad working surface. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the wear of an existing grinding roller;

[0014] Figure 2 This is a top view schematic diagram showing the positional relationship between the conveyor and the grinding mechanism of this utility model;

[0015] Figure 3 This is a front view structural diagram showing the positional relationship between the conveyor and the grinding mechanism of this utility model;

[0016] Figure 4 This is a partial front view schematic diagram of the grinding mechanism of this utility model;

[0017] Figure 5 This is a partial three-dimensional structural diagram of the grinding mechanism of this utility model. Figure 1 ;

[0018] Figure 6 This is a partial three-dimensional structural diagram of the grinding mechanism of this utility model. Figure 2 ;

[0019] Figure 7 This is a schematic diagram of the positioning plate structure of this utility model;

[0020] Figure 8 This is a schematic diagram of the grinding disc structure in the grinding state of this utility model.

[0021] In the diagram: 1. Positioning plate; 2. Brake pad positioning groove; 3. Grinding mechanism; 4. Conveyor; 5. Power telescopic rod; 6. Rotary motor; 7. Power shaft; 8. Support frame; 9. Gear ring; 10. Transmission rod; 11. Grinding disc; 12. Sun gear; 13. Planetary carrier; 14. Planetary gear; 15. Positioning components. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 2-8 A brake pad working surface processing device includes a grinding mechanism 3 and a positioning plate 1. The positioning plate 1 has a plurality of brake pad positioning grooves 2 arranged in a ring. The grinding mechanism 3 includes a planetary gear assembly and a lifting mechanism that can drive the planetary gear assembly to move up and down. The planetary gear assembly includes planetary gears 14 that can rotate on their own axis and revolve around a sun gear 12. The planetary gears 14 are coaxially fixed to a grinding disc 11 through a transmission rod 10. During grinding, the sun gear 12 and the brake pad positioning groove 2 are arranged on the same axis.

[0024] During operation, the grinding mechanism 3 moves downward under the drive of the lifting mechanism, causing the grinding disc 11 to contact the brake pad in the brake pad positioning groove 2 of the positioning plate 1. The rotary motor drives the sun gear 12 to rotate via the power shaft. The sun gear 12 meshes with the planet gears 14, causing the planet gears 14 to rotate on their own axes. Simultaneously, the planet carrier drives the planet gears 14 to revolve around the sun gear 12. (Reference) Figure 8 The combined motion of the planetary gear 14's rotation and revolution causes the transmission rod 10 to drive the grinding disc 11 to continuously sweep the working surface of the brake pad along the circumference, thereby achieving circumferential grinding of the brake pad's working surface. During the grinding process, the sun gear 12 remains coaxial with the brake pad positioning groove 2, allowing the grinding disc 11 to evenly cover the entire area of ​​the brake pad's arc-shaped working surface.

[0025] This device uses a sun gear 12 to drive planetary gears 14, achieving a circular grinding method that combines rotation and revolution. This allows the grinding disc 11 to evenly cover the working surface of the brake pads, effectively avoiding the problem of large differences in grinding amount between the center and ends of the grinding disc compared to the linear contact roller grinding method in the prior art. This device can reduce processing deviations caused by uneven wear and improve the processing quality and utilization rate of the brake pad working surface.

[0026] As one implementation method, the diameter of the grinding disc can be equal to or slightly larger than the width of the brake pad.

[0027] As one implementation method, the lifting mechanism can adopt conventional solutions such as a power telescopic rod 5, a gear and rack mechanism, or a ball screw mechanism, as long as it can drive the entire grinding mechanism 3 to move up and down.

[0028] The planetary gear assembly includes a meshing ring gear 9, multiple planet gears 14, and a sun gear 12. The multiple planet gears 14 are connected by a planet carrier 13. The sun gear 12 is fixedly connected to a drive shaft 7, which in turn drives a rotary motor 6. A support frame 8 is fixedly connected to the top of the ring gear 9. The support frame 8 is fixedly assembled to the lifting end of the lifting mechanism, and the rotary motor 6 is also fixedly assembled to the lifting end of the lifting mechanism. A guide rod is provided between the support frame 8 and the ground or the frame. The support frame 8 is rotatably connected to the drive shaft 7. The planet carrier 13 is rotatably connected to the drive shaft 7. The sun gear 12 is the input component, and its rotational speed directly acts on the planet gears 14 through meshing, causing the planet gears 14 to be subjected to self-rotation. The planetary gear 14 is simultaneously engaged with the ring gear 9, and the ring gear 9 is fixed. The engagement constraint causes the planetary gear 14 to revolve along the circular path while rotating on its own axis. The planetary carrier 13 and the power shaft 7 are rotatably connected. The rotation of the power shaft 7 will not force the planetary carrier 13 to rotate. This allows the planetary carrier 13 to maintain its function of limiting the orbital trajectory of the planetary gear 14 under the constraint of the ring gear 9, without having to be driven as an active component. The guide rod is used to limit the support frame 8 to move only in the vertical direction, so that the ring gear 9, planetary gear 14 and sun gear 12 maintain the same meshing center position during the lifting and lowering process, avoiding meshing instability caused by offset.

[0029] The planetary gear assembly consists of a ring gear 9, multiple planet gears 14, a sun gear 12, and a planet carrier 13. The ring gear 9 is a fixed internal gear structure (not fixed relative to the ground, but can move up and down with the lifting mechanism, only fixed relative to the planet gears 14, sun gear 12, and planet carrier 13). A support frame 8 is fixed to its top, and the support frame 8 is fixed to the lifting end of the lifting mechanism, allowing the ring gear 9 to move linearly up and down with the entire lifting mechanism. A guide rod is provided between the support frame 8 and the ground or frame to limit the movement path of the support frame 8 and the ring gear 9, ensuring that they move only vertically during lifting and preventing lateral deviation.

[0030] The sun gear 12 is fixedly connected to the drive shaft 7, which is driven by the rotary motor 6. The rotary motor 6 is also fixedly mounted to the lifting end of the lifting mechanism, ensuring that the sun gear 12, drive shaft 7, and rotary motor 6 maintain a relatively stable coaxial position with the gear ring 9 under the drive of the lifting mechanism. The drive shaft 7 is rotatably connected to the support frame 8, ensuring that the up-and-down movement of the support frame 8 does not restrict the rotation of the drive shaft 7, thereby ensuring that the sun gear 12 can rotate freely while the support frame 8 moves up and down.

[0031] The planet carrier 13 is rotatably connected to the drive shaft 7. Its function is to prevent the planet carrier 13 from rotating when the drive shaft 7 rotates, thus allowing the planet carrier 13 to maintain its degree of freedom relative to the drive shaft 7. Multiple planet gears 14 are mounted at equal angles through the planet carrier 13 and mesh with the sun gear 12 and the ring gear 9, respectively. When the sun gear 12 rotates under the drive of the rotary motor 6, it drives the multiple planet gears 14 to rotate on their own axis through the meshing relationship. Simultaneously, since the ring gear 9 is fixed, the planet gears 14, under the constraint of meshing, will revolve along the circular trajectory of the planet carrier 13. Rotation and revolution are simultaneous and interconnected composite motions, and the revolution trajectory of the planet gears 14 is defined by the planet carrier 13.

[0032] During the process of the lifting mechanism driving the support frame 8 to move up and down, the gear ring 9, planetary gear 14, planetary carrier 13, sun gear 12 and rotary motor 6 move up and down synchronously as a whole, and when descending, the grinding disc 11 driven by the planetary gear 14 contacts the brake pad, so as to achieve stable grinding of the working surface of the brake pad.

[0033] The processing device also includes a conveyor 4, which runs horizontally under the grinding mechanism 3, and a positioning plate 1 is installed on the conveyor 4.

[0034] Workers place the brake pads on the positioning plate, and the positioning plate 1 and the brake pads on it are conveyed to the grinding mechanism 3 via the conveyor 4, and the ground positioning plate 1 and the brake pads on it are sent out.

[0035] During the use of this device, the movement of the grinding mechanism 3, the positioning plate 1, and the power source can be controlled manually or automatically. The core of this device lies in the grinding structure composed of the sun gear 12, planetary gears 14, planetary carrier 13, and gear ring 9, as well as the overall lifting and lowering coordination of the lifting mechanism with respect to the grinding mechanism 3. Therefore, there are no limitations on the control method. Specifically, in manual control mode, the worker can control the rotary motor 6, the power shaft 7, the lifting mechanism, and the conveyor operation item by item according to the production rhythm, causing the positioning plate 1 to drive the brake pads into the brake pad positioning groove 2 sequentially, and manually start the grinding mechanism 3 to complete the processing when grinding is required.

[0036] In automated control mode, positioning components 15 can be installed on the positioning plate 1. For example, existing mature photoelectric sensing positioning methods, magnetic induction positioning methods, or other detection elements that can identify the position of the positioning plate 1 can be used. When the positioning plate 1 moves with the conveyor to directly below the grinding mechanism 3, the positioning component 15 transmits the detection signal to the controller. The controller then starts the rotary motor 6 according to a preset logic sequence, causing the sun gear 12 to drive the planetary gears 14 to rotate and revolve, and drives the lifting mechanism to move down so that the grinding disc 11 contacts the brake pads for grinding. After grinding is completed, the controller drives the lifting mechanism to rise again, causing the grinding disc 11 to disengage from the brake pads, and controls the conveyor to continue running so that the next set of brake pads enters the grinding area.

[0037] It should be noted that the innovation of this application lies mainly in achieving the compound motion of the grinding disc 11 through a planetary gear assembly, and in achieving stable contact between the grinding mechanism 3 and the brake pads through a lifting mechanism. This device does not limit the control method; whether manual, semi-automatic, or fully automatic control is used, it does not affect the structural configuration and workflow of the device. Those skilled in the art can choose any control method according to production needs, all of which fall within the feasible implementation range of this device structure.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technical solution, concept, or design obtained by those skilled in the art by making equivalent substitutions or changes based on the technical solution and utility model concept disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A brake pad working surface processing device, characterized in that, The system includes a grinding mechanism (3) and a positioning plate (1). The positioning plate (1) has several brake pad positioning grooves (2) arranged in a ring. The grinding mechanism (3) includes a planetary gear assembly and a lifting mechanism that can drive the planetary gear assembly to move up and down. The planetary gear assembly includes a planetary gear (14) that can rotate on its own axis and revolve around the sun gear (12). The planetary gear (14) is coaxially fixed to a grinding disc (11) through a transmission rod (10). During grinding, the sun gear (12) and the brake pad positioning groove (2) are arranged on the same axis.

2. The brake pad working surface processing device according to claim 1, characterized in that, The planetary gear assembly includes a meshing gear ring (9), multiple planetary gears (14), and a sun gear (12). The multiple planetary gears (14) are connected by a planet carrier (13). The sun gear (12) is fixedly connected to a power shaft (7). The power shaft (7) is driven by a rotary motor (6). A support frame (8) is fixedly connected to the top of the gear ring (9). The support frame (8) is fixedly assembled with the lifting end of the lifting mechanism. The rotary motor (6) is fixedly assembled with the lifting end of the lifting mechanism.

3. The brake pad working surface processing device according to claim 2, characterized in that, The support frame (8) is provided with a guide rod between itself and the ground or the frame.

4. The brake pad working surface processing device according to claim 2, characterized in that, The support frame (8) is rotatably connected to the power shaft (7).

5. The brake pad working surface processing device according to claim 2, characterized in that, The planetary carrier (13) is rotatably connected to the power shaft (7).

6. A brake pad working surface processing device according to any one of claims 1-5, characterized in that, The processing device also includes a conveyor (4) that runs across the bottom of the grinding mechanism (3), and the positioning plate (1) is mounted on the conveyor (4).

Images