Outer arc grinding machine for vehicle brake shoe assembly

Abstract

The invention discloses a vehicle brake shoe assembly outer arc grinding machine which comprises a base, a clamping rotating mechanism, a coarse grinding mechanism, a fine grinding mechanism and a position changing mechanism are arranged on the base, the position changing mechanism enables a brake shoe assembly to be rotated to be coaxial with a rotating disc and pushes the brake shoe assembly to the rotating disc, and a positioning column on the clamping rotating mechanism is matched with a clamping mechanism to fix the brake shoe assembly. Compared with independent outer arc grinding of the brake pad, the produced combination of the brake shoe and the brake pad is better in matching degree with a brake drum, the number of adjusting times among all components during assembly is reduced, and therefore the assembly difficulty is reduced; and meanwhile, full-automatic feeding, positioning alignment, grinding and discharging are adopted, the human resource requirement is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of brake shoe processing equipment, in particular to an external arc grinder for a vehicle brake shoe assembly. Background Art

[0002] Brake shoes usually refer to the components in the vehicle system that rub against the brake drum to achieve braking. When working, they are pressed against the brake drum under the action of the cam or push rod of the braking system. Brake shoes are installed with replaceable brake pads, the main friction components. During production, their outer arc surfaces need to be polished to ensure good fit with the brake drum after installation.

[0003] At present, the outer arc surface grinding of brake pads is usually carried out before they are assembled to brake shoes, which has the following disadvantages: 1. Brake shoes are made of steel plate cutting and welding, and there are dimensional errors between the finished brake shoes. When brake pads ground by the same support are assembled on the brake shoes, the fit between them and the brake drum is affected; 2. Manual loading and positioning, production efficiency is restricted by the proficiency of the operator. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and to provide an external arc grinder for a vehicle brake shoe assembly to solve the technical problems raised in the background technology.

[0005] In order to achieve the above technical objectives, the technical solution of the present invention provides a vehicle brake shoe assembly external arc grinder, comprising:

[0006] A base, wherein a clamping and rotating mechanism, a fine grinding mechanism and a displacement mechanism are arranged on the base; the clamping and rotating mechanism comprises a clamping support, a turntable is arranged above the clamping support, a rotation servo device is arranged below the clamping support, the rotation servo device drives the turntable to rotate on the clamping support, two groups of positioning columns are symmetrically arranged on the surface of the turntable, a clamping mechanism is arranged at the center of the turntable, the displacement mechanism rotates the brake shoe assembly to be coaxial with the turntable and pushes it onto it, and the positioning column cooperates with the clamping mechanism to fix the brake shoe assembly.

[0007] Furthermore, the shifting mechanism includes a slide groove, an arc-surface slider and a rodless cylinder are arranged inside the slide groove, the slide seat of the rodless cylinder is connected to the arc-surface slider, a first shifting cylinder is arranged on one side of the slide groove, a shifting support is arranged on the other side, a shifting servo device is slidably arranged on the shifting support, a second shifting cylinder is arranged on the outer side of the shifting support, the piston rod of the second shifting cylinder is connected to the shifting servo device, the piston rod of the first shifting cylinder and the output shaft of the shifting servo device are both provided with blocking blocks, and through holes matching the blocking blocks are arranged on both side walls of the slide groove.

[0008] Furthermore, the clamping mechanism includes a clamping support and two pulling cylinders, the two pulling cylinders are arranged on the clamping support with their backs to each other, a clamping cylinder is arranged on the piston rod of the pulling cylinder, and the two clamping claws of the clamping cylinder are respectively provided with L-shaped clamping plates that are mirror images of each other.

[0009] Furthermore, electromagnets are arranged on opposite sides of the two L-shaped clamping plates.

[0010] Furthermore, a coarse grinding mechanism is arranged on the base, and the coarse grinding mechanism is arranged between the displacement mechanism and the fine grinding mechanism.

[0011] Furthermore, the fine grinding mechanism includes a fine grinding base, a fine grinding wheel cover is arranged on the fine grinding base, a fine grinding wheel is arranged inside the fine grinding wheel cover, and a fine grinding motor is arranged outside, and the wheel axle of the fine grinding wheel is connected to the output shaft of the fine grinding motor.

[0012] Furthermore, the rough grinding mechanism includes a rough grinding base, a reduction mechanism is arranged on the rough grinding base, a rough grinding motor is arranged above the reduction mechanism, the output shaft of the rough grinding motor is connected to the input shaft of the reduction mechanism, a rough grinding wheel cover is arranged on the output end of the reduction mechanism, and a rough grinding wheel connected to the output shaft of the reduction mechanism is arranged in the rough grinding wheel cover.

[0013] Furthermore, the rough grinding base and the fine grinding base are both provided with a feeding mechanism, and the two feeding mechanisms respectively drive the reduction mechanism and the fine grinding wheel cover to slide on the rough grinding base and the fine grinding base, and the axial direction of the fine grinding wheel is perpendicular to the axial direction of the rough grinding wheel.

[0014] Furthermore, each group of the positioning columns consists of two, the lower ends of the two positioning columns are fixedly connected to the turntable, and the upper ends are fixedly connected via a connecting piece.

[0015] Furthermore, the slide groove is arranged on the clamping support, and the inner bottom surface of the slide groove coincides with the upper surface of the turntable.

[0016] Compared with the prior art, the beneficial effects of the present invention include:

[0017] 1. The present invention is provided with a clamping and rotating mechanism, a rough grinding mechanism, a fine grinding mechanism and a displacement mechanism on the base. The displacement mechanism rotates the brake shoe assembly to be coaxial with the turntable and pushes it onto the turntable. The positioning column on the clamping and rotating mechanism cooperates with the clamping mechanism to fix the brake shoe assembly. Compared with the outer arc grinding of the brake pad performed separately, the combination of the brake shoe and the brake pad produced by the present invention has a better degree of coordination with the brake drum, which is beneficial to reducing the number of adjustments between the various components during assembly, thereby reducing the difficulty of assembly; at the same time, the present invention adopts fully automatic loading, positioning and alignment, grinding and unloading, which reduces the demand for human resources and improves production efficiency.

[0018] 2. The present invention not only realizes the grinding of the outer arc surface of drum brake pads of equal thickness and unequal thickness by setting a rough grinding mechanism and a fine grinding mechanism with the grinding wheels axially perpendicular to each other, but also forms a fine mesh structure on the outer arc surface of the brake pad of the ground brake shoe assembly, which is beneficial to generate reliable braking force when the brake shoe assembly and the brake drum are initially matched. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a first embodiment of an external arc grinder for a vehicle brake shoe assembly provided by the present invention;

[0020] Figure 2 It is a schematic diagram of a clamping and rotating mechanism of an external arc grinder for a vehicle brake shoe assembly provided by the present invention;

[0021] Figure 3 It is a schematic diagram of a displacement mechanism of an external arc grinder for a vehicle brake shoe assembly provided by the present invention;

[0022] Figure 4 It is a working schematic diagram of an external arc grinder for a vehicle brake shoe assembly provided by the present invention;

[0023] Figure 5 It is a schematic diagram of a second embodiment of an external arc grinder for a vehicle brake shoe assembly provided by the present invention;

[0024] Figure 6 It is a schematic diagram of a fine grinding mechanism of an external arc grinder for a vehicle brake shoe assembly provided by the present invention;

[0025] Figure 7 It is a schematic diagram of a rough grinding mechanism of an external arc grinder for a vehicle brake shoe assembly provided by the present invention;

[0026] Figure 8 It is a schematic diagram of a clamping mechanism of an external arc grinder for a vehicle brake shoe assembly provided by the present invention;

[0027] In the figure: base 1, clamping rotation mechanism 2, clamping support 201, rotation servo device 202, turntable 203, positioning column 204, connecting piece 205, rough grinding mechanism 3, rough grinding base 301, speed reduction mechanism 302, rough grinding feed mechanism 303, rough grinding motor 304, grinding wheel cover 305, rough grinding wheel 306, fine grinding mechanism 4, fine grinding base 401, fine grinding feed mechanism 403, fine grinding wheel cover 404, fine grinding motor 405, fine grinding Grinding wheel 406, displacement mechanism 5, slide groove 501, arc surface slider 502, rodless cylinder 503, second displacement cylinder 504, displacement support 505, servo device 506, block 507, through hole 508, displacement cylinder 509, conveyor belt 6, manipulator 7, brake shoe assembly 8, arc support plate 801, clamping mechanism 9, clamping support 901, pull-in cylinder 902, clamping claw cylinder 903, L-shaped clamping plate 904, electromagnet 905. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] Example 1

[0030] Reference Figure 1 The present invention provides an external arc grinder for a vehicle brake shoe assembly, comprising a base 1, on which a clamping and rotating mechanism 2, a fine grinding mechanism 4 and a displacement mechanism 5 are installed, and the fine grinding mechanism 4 and the displacement mechanism 5 are arranged on the periphery of the clamping and rotating mechanism 2.

[0031] Reference Figure 2 The clamping and rotating mechanism 2 includes a clamping support 201, which is fixedly mounted on the base 1. A turntable 203 is arranged above the clamping support 201, and a rotating servo device 202 is arranged below the clamping support 201. The rotating servo device 202 drives the turntable 203 to rotate on the clamping support 201. Two groups of positioning columns 204 are symmetrically arranged on the disk surface of the turntable 203, and each group of positioning columns 204 has two. The lower ends of the two positioning columns 204 are fixedly mounted on the turntable 203, and the upper ends are connected by a connecting piece 205. A clamping mechanism 9 is arranged at the center of the turntable 203.

[0032] Reference Figure 3The displacement mechanism 5 includes a slide groove 501, and an arc-surface slider 502 and a rodless cylinder 503 are installed inside the slide groove 501. The slide seat of the rodless cylinder 503 is connected to the arc-surface slider 502 to drive it to reciprocate in the slide groove 501. A first displacement cylinder 509 is installed on one side of the slide groove 501, and a displacement support 505 is installed on the other side. A displacement servo device 506 is slidably installed on the displacement support 505, and a second displacement cylinder 504 is installed on the outer side of the displacement support 505. The piston rod of the second displacement cylinder 504 is connected to the displacement servo device 506 to drive it to approach or move away from the slide groove 501. Blocks 507 are installed on the piston rod of the first displacement cylinder 509 and the output shaft of the displacement servo device 506. Through holes 508 matching with the block 507 are opened on the two side walls of the slide groove 501.

[0033] The brake shoe assembly 8 is formed by riveting a brake shoe and a brake pad. The inner side of the arc surface of the brake shoe is two arc-shaped support plates 801 connected to the brake mechanism. Both ends of the arc-shaped support plates 801 are provided with semicircular grooves for connection and positioning.

[0034] In order to facilitate the understanding of the present invention, the following Figure 1 - Figure 4 The working principle of this solution is described in detail:

[0035] The outer side of the brake shoe is arc-shaped. In actual production, in order to keep it stable during transportation, the brake shoe is usually inverted on the conveyor belt 6 with the two ends of the two arc-shaped support plates as support feet. During production, the robot 7 grabs the brake shoe assembly 8 from the conveyor belt 6 and puts it into the displacement mechanism 5; at this time, the block 507 is in the slide groove 501, and the two arc-shaped support plates 801 are respectively on both sides of the block 507, and the displacement servo device 506 drives the block 507 to rotate, thereby realizing the displacement of the brake shoe assembly 8; after the brake shoe assembly 8 is displaced, the arc surface of its brake pad is tangent to the arc surface of the arc slider 502.

[0036] The first displacement cylinder 509 and the second displacement cylinder 504 retract, and the blocking block 507 disengages from between the two arc-shaped support plates 801. The rodless cylinder 503 pushes the brake shoe assembly 8 toward the turntable 203 through the arc-shaped slider 502. The positioning column 204 on the turntable 203 cooperates with the semicircular grooves at both ends of the arc-shaped support plate 801 to realize the positioning of the brake shoe assembly 8 on the turntable 203. The clamping mechanism 9 clamps the two arc-shaped support plates 801 to fix the brake shoe assembly 8 on the turntable 203.

[0037] The rotary servo device 202 drives the brake shoe assembly 8 to rotate to the fine grinding mechanism 4, and grinds the outer arc of the brake pad thereon according to the production set value. After grinding, the stack is removed by the unloading robot. Compared with the separate outer arc grinding of the brake pad, the brake pad is riveted to the brake shoe and then the outer arc grinding is performed to make the combination of the brake shoe and brake pad better fit with the brake drum, which is beneficial to reduce the number of adjustments between the various components during assembly, thereby reducing the difficulty of assembly. At the same time, the present invention adopts fully automatic loading, positioning and alignment, grinding and unloading, which reduces the demand for human resources and improves production efficiency.

[0038] Example 2

[0039] Based on Example 1, Figure 5-7 The fine grinding mechanism 4 includes a fine grinding base 401, on which a fine grinding wheel cover 404 and a fine grinding feed mechanism 403 are arranged. The fine grinding feed mechanism 403 drives the fine grinding wheel cover 404 to slide on the fine grinding base 401 to approach or move away from the clamping rotating mechanism 2. A fine grinding wheel 406 is installed inside the fine grinding wheel cover 404, and a fine grinding motor 405 is installed outside. The wheel axle of the fine grinding wheel 406 is connected to the output shaft of the fine grinding motor 405.

[0040] A rough grinding mechanism 3 is also installed on the base 1 between the displacement mechanism 5 and the fine grinding mechanism 4. The rough grinding mechanism 3 includes a rough grinding base 301. A rough grinding feed mechanism 303 and a reduction mechanism 302 are installed on the rough grinding base 301. The rough grinding feed mechanism 303 drives the reduction mechanism 302 to slide on the rough grinding base 301 to approach or move away from the clamping rotating mechanism 2. A rough grinding motor 304 is arranged above the reduction mechanism 302. The output shaft of the rough grinding motor 304 is connected to the input shaft of the reduction mechanism 302. A rough grinding wheel cover 305 is installed on the output end of the reduction mechanism 302. A rough grinding wheel 306 connected to the output shaft of the reduction mechanism 302 is installed inside the rough grinding wheel cover 305.

[0041] During production, the brake shoe assembly 8 on the clamping rotating mechanism 2 is successively subjected to the rough grinding mechanism 3 and the fine grinding mechanism 4 for grinding the outer arc of the brake pad; compared with the existing outer arc grinding equipment which only has a single grinding mechanism, the grinding speed is effectively improved, and the grinding quality of the outer arc is also improved accordingly after being ground by grinding wheels of different mesh sizes; the speed reduction mechanism 302 and the fine grinding wheel cover 404 slide in a controlled manner on the rough grinding base 301 and the fine grinding base 401 respectively, thereby realizing the grinding of the outer arc surface of the drum brake pad with non-uniform thickness.

[0042] In actual applications, the axial direction of the fine grinding wheel 406 is perpendicular to the axial direction of the rough grinding wheel 306; specifically, the axle of the fine grinding wheel 406 is in a vertical state, and the axle of the rough grinding wheel 306 is in a horizontal state. In this way, a fine mesh structure is formed on the outer arc surface of the brake pad of the grinded brake shoe assembly 8, which is beneficial to generate reliable braking force when the brake shoe assembly 8 and the brake drum are initially matched.

[0043] Embodiment 3,

[0044] Reference Figure 8 The clamping mechanism 9 includes a clamping support 901 and two pulling-in cylinders 902. The two pulling-in cylinders 902 are installed on the clamping support 901 with their backs to each other. A clamping cylinder 903 is installed on the piston rod of the pulling-in cylinder 902. The two clamping jaws of the clamping cylinder 903 are respectively installed with L-shaped clamping plates 904 that are mirror images of each other. Electromagnets 905 are arranged on the opposite sides of the two L-shaped clamping plates 904. When working, the outer sides of the two arc-shaped support plates 801 are inserted between the two L-shaped clamping plates 904, and the clamping jaw cylinder 903 contracts to press the electromagnet 905 against the arc-shaped support plate 801. After the electromagnet 905 is energized, the arc-shaped support plate 801 is sucked tightly; then the pulling-in cylinder 902 retracts to press the two ends of the arc-shaped support plate 801 against the positioning column 204, so that the brake shoe assembly 8 and the turntable 203 remain coaxial, ensuring the grinding accuracy of its outer arc surface.

[0045] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A vehicle brake shoe assembly external arc grinder, comprising: A base, on which a clamping and rotating mechanism, a fine grinding mechanism and a displacement mechanism are arranged; It is characterized in that: the clamping and rotating mechanism includes a clamping support, a turntable is arranged above the clamping support, and a rotating servo device is arranged below the clamping support, the rotating servo device drives the turntable to rotate on the clamping support, two groups of positioning columns are symmetrically arranged on the disk surface of the turntable, a clamping mechanism is arranged at the center of the turntable, the displacement mechanism rotates the brake shoe assembly to be coaxial with the turntable and pushes it onto it, and the positioning column cooperates with the clamping mechanism to fix the brake shoe assembly.

2. The vehicle brake shoe assembly external arc grinder according to claim 1, characterized in that: The displacement mechanism includes a slide groove, an arc-surface slider and a rodless cylinder are arranged inside the slide groove, the slide seat of the rodless cylinder is connected to the arc-surface slider, a first displacement cylinder is arranged on one side of the slide groove, and a displacement support is arranged on the other side, a displacement servo device is slidably arranged on the displacement support, a second displacement cylinder is arranged on the outer side of the displacement support, the piston rod of the second displacement cylinder is connected to the displacement servo device, the piston rod of the first displacement cylinder and the output shaft of the displacement servo device are both provided with clamping blocks, and through holes matching with the clamping blocks are arranged on both side walls of the slide groove.

3. The vehicle brake shoe assembly external arc grinder according to claim 2, characterized in that: The clamping mechanism includes a clamping support and two pulling cylinders. The two pulling cylinders are arranged on the clamping support with their backs to each other. A clamping cylinder is arranged on the piston rod of the pulling cylinder. The two clamping claws of the clamping cylinder are respectively provided with L-shaped clamping plates that are mirror images of each other.

4. The vehicle brake shoe assembly external arc grinder according to claim 3, characterized in that: Electromagnets are arranged on opposite sides of the two L-shaped clamping plates.

5. A vehicle brake shoe assembly external arc grinder according to any one of claims 2 to 4, characterized in that: A coarse grinding mechanism is arranged on the base, and the coarse grinding mechanism is arranged between the displacement mechanism and the fine grinding mechanism.

6. The vehicle brake shoe assembly external arc grinder according to claim 5, characterized in that: The fine grinding mechanism comprises a fine grinding base, a fine grinding wheel cover is arranged on the fine grinding base, a fine grinding wheel is arranged inside the fine grinding wheel cover, a fine grinding motor is arranged outside the fine grinding wheel cover, and the wheel axle of the fine grinding wheel is connected to the output shaft of the fine grinding motor.

7. The vehicle brake shoe assembly external arc grinder according to claim 6, characterized in that: The rough grinding mechanism includes a rough grinding base, a reduction mechanism is arranged on the rough grinding base, a rough grinding motor is arranged above the reduction mechanism, the output shaft of the rough grinding motor is connected to the input shaft of the reduction mechanism, a rough grinding wheel cover is arranged on the output end of the reduction mechanism, and a rough grinding wheel connected to the output shaft of the reduction mechanism is arranged in the rough grinding wheel cover.

8. The vehicle brake shoe assembly external arc grinder according to claim 7, characterized in that: The rough grinding base and the fine grinding base are both provided with a feeding mechanism, and the two feeding mechanisms respectively drive the reduction mechanism and the fine grinding wheel cover to slide on the rough grinding base and the fine grinding base, and the axial direction of the fine grinding wheel is perpendicular to the axial direction of the rough grinding wheel.

9. The vehicle brake shoe assembly external arc grinder according to any one of claims 6 to 8, characterized in that: Each group of positioning posts has two posts, the lower ends of the two positioning posts are fixedly connected to the turntable, and the upper ends are fixedly connected via connecting pieces.

10. The vehicle brake shoe assembly external arc grinder according to claim 9, characterized in that: The slide groove is arranged on the clamping support, and the inner bottom surface of the slide groove coincides with the upper surface of the rotating disk.

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