Outer arc grinding machine for automobile drum brake pad

Abstract

The utility model discloses an outer arc grinding machine for an automobile drum brake pad. Comprising a workbench, an annular mold, a driving mechanism, a grinding unit, a two-axis translation mechanism and a mounting disc, wherein an annular groove is formed in the outer wall of the annular mold in a sunken mode; the driving mechanism is used for driving the annular mold to rotate; the two-axis translation mechanism is assembled on the workbench and can drive the grinding unit to vertically move and can drive the grinding unit to move close to the annular mold; the first clamp unit is assembled on the upper surface of the mounting disc, the second clamp unit is assembled on the lower surface of the mounting disc, the first clamp unit comprises a plurality of arc-shaped positioning pieces which can downwards sleeve the outer sides of the upper portions of the corresponding brake pads, and the second clamp unit comprises an annular positioning sleeve which can upwards move to sleeve the outer sides of the lower portions of the brake pads; in the grinding process, the arc-shaped positioning piece and the annular positioning sleeve alternately sleeve the outer side of the brake pad, the inner wall of the brake pad can be always kept to be attached to the annular groove, and the grinding thicknesses of the middle and the edge of the brake pad are consistent.

Description

Technical Field

[0001] The utility model relates to the technical field related to brake pads, and in particular to an external arc grinding machine for automobile drum brake pads. Background Art

[0002] Drum brakes use stationary brake pads inside a drum to rub against the rotating drum, generating friction that slows the wheels. When the brake pedal is depressed, the force applied by your foot causes the piston in the master brake cylinder to push the brake fluid forward, generating pressure in the oil circuit. This pressure is transmitted through the brake fluid to the pistons in the wheel cylinders at each wheel. These pistons then push the brake pads outward, causing them to rub against the inner surface of the drum, generating enough friction to slow the wheel's rotation and achieve the desired braking effect.

[0003] my country's utility model patent application number CN202110633699.5, "A drum brake pad outer arc grinder", discloses a drum brake pad outer arc grinder. The drum brake pad in the loading rack is pushed to the side of the grinding table by the conveyor chain and the push block. The loading flipping mechanism flips the drum brake pad and transports it to the working station of the grinding table. The grinding table drives the drum brake pad to move. The drum brake pad contacts the grinding tool and is ground on the outer arc by the grinding tool. Then, it is pushed from the working station of the grinding table into the unloading flipping mechanism by a pusher. The unloading flipping mechanism flips the ground drum brake pad to a vertical state. It has a high degree of automation and can continuously grind the outer arcs of multiple drum brake pads with high processing efficiency.

[0004] However, the above patent still has the following shortcomings: in the absence of external force, the inner wall of the brake pad cannot completely fit the outer surface of the cylinder, and the contact between the brake pad and the outer surface of the cylinder is line contact. During the grinding process, the grinding thickness of different parts of the outer surface of the brake pad is inconsistent, and the thickness of the brake pad after grinding is uneven. Therefore, it is necessary to design an automotive drum brake pad outer arc grinder. Utility Model Content

[0005] In view of the above technical problems, the purpose of the present utility model is to overcome the problem in the prior art that the brake pad cannot completely fit the cylinder, resulting in uneven thickness of the brake pad after grinding.

[0006] To achieve the above-mentioned object, the utility model provides an automobile drum brake pad external arc grinding machine, comprising: a workbench, a vertical annular mold having an annular groove recessed in the outer wall and capable of rotating about its own axis, a driving mechanism for driving the annular mold to rotate, a grinding unit for grinding the brake pad located in the annular groove, a two-axis translation mechanism mounted on the workbench and capable of driving the grinding unit to move vertically and to move the grinding unit close to the annular mold, a mounting plate coaxially mounted on the bottom of the annular mold, a first clamping unit mounted on the upper surface of the mounting plate, and a second clamping unit mounted on the lower surface of the mounting plate;

[0007] The first clamp unit includes several arc-shaped positioning members evenly distributed along the circumferential direction of the annular mold and can be downwardly mounted on the outer side of the upper part of the corresponding brake pad. The second clamp unit includes an annular positioning sleeve coaxially arranged with the annular mold and capable of upward movement and mounting on the outer side of the lower part of several brake pads.

[0008] Preferably, a first chamfered flared portion is provided at the top of the inner wall of the annular positioning sleeve, and a second chamfered flared portion is provided at the bottom of the inner plate of the arc-shaped positioning piece.

[0009] Preferably, the first clamp unit also includes a center column coaxially fixedly assembled on the mounting plate, a plurality of connecting frames connected one-to-one with the plurality of arc-shaped positioning members, a slider connected one-to-one with the plurality of connecting frames and each of which is vertically slidably connected to the center column, and a plurality of vertical first driving push rods assembled on the mounting plate and with output ends fixedly connected to the corresponding connecting frames.

[0010] Preferably, a dust cover is coaxially mounted on the top of the center column, two adjacent arc-shaped positioning members are in close contact, the top of each arc-shaped positioning member is connected to an arc-shaped plate that is in sliding contact with the edge of the dust cover, and the edges of the two adjacent arc-shaped plates are in close contact.

[0011] Preferably, the second clamp unit also includes a support sleeve whose upper end is fixedly connected to the mounting plate coaxially, a sliding plate vertically slidably connected to the outer wall of the support sleeve and fixedly connected to the annular positioning sleeve, a mounting plate fixedly connected to the bottom of the support sleeve, a vertical second drive push rod assembled on the mounting plate and located inside the support sleeve, a connecting block fixedly connected to the output end of the second drive push rod, and a connecting bolt assembled on the connecting block and slidingly passing through the support sleeve to connect with the sliding plate.

[0012] Preferably, the support sleeve is provided with a vertical strip through-slot for the link bolt to pass through, and the sliding plate is equipped with a sliding sleeve which is sleeved on the outside of the support sleeve and covers the strip through-slot.

[0013] Preferably, the sliding plate is provided with a plurality of debris removal grooves.

[0014] Preferably, the driving mechanism includes a mounting frame mounted on the bottom of the workbench, a vertical rotating shaft fixedly connected to the mounting plate and coaxially arranged with the annular mold and connected to the mounting frame, and a first motor mounted on the mounting frame, the output shaft of the first motor being connected to the rotating shaft through a pair of meshing gears.

[0015] Preferably, the grinding unit comprises a second motor mounted on a two-axis translation mechanism with an output shaft in a vertical state, and a horizontal grinding wheel mounted on the output shaft of the second motor.

[0016] According to the above technical solution, the utility model provides an automobile drum brake pad outer arc grinder, which has the following beneficial effects when in use: during the grinding process, the arc-shaped positioning piece and the annular positioning sleeve are alternately arranged on the outer side of the brake pad, which can always keep the inner wall of the brake pad in contact with the annular groove, so that the grinding thickness of the middle and edge of the brake pad is consistent.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation methods; and the parts not involved in the present invention are the same as the existing technology or can be implemented by using the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a three-dimensional structural diagram of an automobile drum brake pad external arc grinder provided by the present invention;

[0020] Figure 2 This is a partial three-dimensional structure diagram of an automobile drum brake pad external arc grinder provided by this utility model. Figure 1 ;

[0021] Figure 3 This is a kind of automobile drum brake pad external arc grinder provided by this utility model. Figure 2 sectional view of

[0022] Figure 4 This is a partial three-dimensional structure diagram of an automobile drum brake pad external arc grinder provided by this utility model. Figure 2 ;

[0023] Figure 5 This is a partial three-dimensional structure diagram of an automobile drum brake pad external arc grinder provided by this utility model. Figure 3 .

[0024] Description of Reference Numerals

[0025] 1. Workbench; 2. Annular groove; 3. Annular mold; 4. Two-axis translation mechanism; 5. Mounting plate; 6. Brake pad; 7. Arc-shaped positioning member; 8. Annular positioning sleeve; 9. Center column; 10. Connecting frame; 11. Slider; 12. First driving push rod; 13. Dust cover; 14. Arc-shaped plate; 15. Support sleeve; 16. Sliding plate; 17. Mounting plate; 18. Second driving push rod; 19. Connecting block; 20. Strip groove; 21. Sliding sleeve; 22. Debris removal groove; 23. Mounting frame; 24. Rotating shaft; 25. First motor; 26. Second motor; 27. Grinding wheel. DETAILED DESCRIPTION

[0026] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0027] In the present invention, unless otherwise stated, directional words such as "upper, lower, inside, outside" contained in a term merely represent the orientation of the term in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0028] like Figure 1-5 As shown, a drum brake pad external arc grinding machine for automobiles comprises: a workbench 1, a vertical annular mold 3 having an annular groove 2 recessed in its outer wall and rotatable about its own axis, a driving mechanism for driving the annular mold 3 to rotate, a grinding unit for grinding a brake pad 6 located in the annular groove 2, a two-axis translation mechanism 4 mounted on the workbench 1 and capable of driving the grinding unit to move vertically and close to the annular mold 3, a mounting plate 5 coaxially mounted on the bottom of the annular mold 3, a first clamp unit mounted on the upper surface of the mounting plate 5, and a second clamp unit mounted on the lower surface of the mounting plate 5;

[0029] The first clamp unit includes several arc-shaped positioning members 7 evenly distributed along the circumferential direction of the annular mold 3 and capable of being downwardly sleeved on the outer side of the upper part of the corresponding brake pad 6. The second clamp unit includes an annular positioning sleeve 8 coaxially arranged with the annular mold 3 and capable of being moved upwardly sleeved on the outer side of the lower part of several brake pads 6.

[0030] A plurality of brake pads 6 are placed in the annular groove 2, the first clamp unit is started first, the arc-shaped positioning piece 7 moves downward and is sleeved on the upper outer side of the brake pad 6. At this time, the brake pad 6 is restricted in the annular groove 2, and the two-axis translation mechanism 4 drives the grinding unit to move close to the annular mold 3. The grinding unit will grind the brake pad 6. The driving mechanism will drive the annular mold 3 to rotate, and the grinding unit can grind a plurality of brake pads 6 in the annular groove 2. The two-axis translation mechanism 4 will also drive the grinding unit to move upward, so that the grinding unit grinds the part of the brake pad 6 located below the arc-shaped positioning piece 7;

[0031] After the grinding of the part of the brake pad 6 located below the arc-shaped positioning piece 7 is completed, the second clamp unit is started, and the annular positioning sleeve 8 will move upward and be mounted on the outer wall of the lower part of several brake pads 6. At this time, several arc-shaped positioning pieces 7 can move upward, and the two-axis translation mechanism 4 drives the grinding unit to adjust its position, so that the grinding unit can grind the upper part of the brake pad 6. During the grinding process, the inner wall of the brake pad 6 can always be kept in contact with the annular groove 2, so the grinding thickness of the middle and edge of the brake pad 6 is consistent.

[0032] When the first clamp unit is started first and the second clamp unit is started later, the arc-shaped positioning piece 7 matches the brake pad 6 before grinding, and the annular positioning sleeve 8 matches the brake pad 6 after grinding; when the second clamp unit is started first and the first clamp unit is started later, the arc-shaped positioning piece 7 matches the brake pad 6 after grinding, and the annular positioning sleeve 8 matches the brake pad 6 before grinding.

[0033] The two-axis translation mechanism 4 is an existing mature technology, and its structure and working principle will not be elaborated in this article. Because the driving mechanism drives the annular mold 3 to rotate, it can provide power to the first clamp unit and the second clamp unit through the brushes and the annular conductive strips in the rotating state.

[0034] The top of the inner wall of the annular positioning sleeve 8 is provided with a first chamfered and expanded portion, and the bottom of the inner plate of the arc-shaped positioning member 7 is provided with a second chamfered and expanded portion.

[0035] In the absence of external force, there will be a curvature difference between the inner wall of the brake pad 6 and the side wall of the annular groove 2. Therefore, a first chamfered flared portion and a second chamfered flared portion are provided to facilitate the arc-shaped positioning member 7 and the annular positioning sleeve 8 to be mounted on the outer wall of the brake pad 6, thereby increasing the extrusion force exerted by the arc-shaped positioning member 7 and the annular positioning sleeve 8 on the brake pad 6 and preventing the brake pad 6 from slipping.

[0036] The first clamp unit also includes a center column 9 coaxially fixedly assembled on the mounting plate 5, a plurality of connecting frames 10 connected one-to-one with the plurality of arc-shaped positioning members 7, a slider 11 connected one-to-one with the plurality of connecting frames 10 and vertically slidingly connected to the center column 9, and a plurality of vertical first driving push rods 12 assembled on the mounting plate 5 and with the output ends fixedly connected to the corresponding connecting frames 10.

[0037] The first driving push rod 12 drives the slider 11 to slide vertically on the central column 9 through the connecting frame 10, and the connecting frame 10 drives the arc-shaped positioning member 7 to move vertically.

[0038] The top of the center column 9 is coaxially equipped with a dust cover 13, and two adjacent arc-shaped positioning members 7 are in contact with each other. The top of each arc-shaped positioning member 7 is connected to an arc-shaped plate 14 that is in sliding contact with the edge of the dust cover 13, and the edges of the two adjacent arc-shaped plates 14 are in contact with each other.

[0039] The function of the dust cover 13 and the arc plate 14 is to block external debris from entering the interior of the annular mold 3. The two adjacent arc-shaped positioning members 7 are in close contact and can also prevent particles generated by grinding from entering the interior of the annular mold 3, thereby playing a dust-proof role.

[0040] The second clamp unit also includes a support sleeve 15 whose upper end is fixedly connected coaxially with the mounting plate 5, a sliding plate 16 vertically slidingly connected to the outer wall of the support sleeve 15 and fixedly connected to the annular positioning sleeve 8, a mounting plate 17 fixedly connected to the bottom of the support sleeve 15, a vertical second drive push rod 18 assembled on the mounting plate 17 and located inside the support sleeve 15, a connecting block 19 fixedly connected to the output end of the second drive push rod 18, and a connecting bolt assembled on the connecting block 19 and slidingly passing through the support sleeve 15 to connect with the sliding plate 16.

[0041] The second driving push rod 18 drives the sliding plate 16 to move vertically through the connecting block 19 and the connecting bolt, and the sliding plate 16 drives the annular positioning sleeve to move vertically.

[0042] The support sleeve 15 is provided with a vertical strip-shaped through-slot 20 for the link bolt to pass through, and the sliding plate 16 is equipped with a sliding sleeve 21 which is sleeved on the outside of the support sleeve 15 and covers the strip-shaped through-slot 20 .

[0043] During the sliding process of the sliding plate 16 , the sliding sleeve 21 can also be covered in the strip-shaped through groove 20 , thereby preventing external debris from entering the interior of the support sleeve 15 and playing a dust-proof role.

[0044] The sliding plate 16 is provided with a plurality of debris removal slots 22 extending therethrough.

[0045] Part of the particles generated by grinding the brake pad 6 will fall onto the upper surface of the sliding plate 16. To avoid the accumulation problem, a debris removal groove 22 is provided so that the particles can fall downward through the debris removal groove 22.

[0046] The driving mechanism includes a mounting frame 23 assembled on the bottom of the workbench 1, a vertical rotating shaft 24 fixedly connected to the mounting plate 17 and coaxially arranged with the annular mold 3 and axially connected to the mounting frame 23, and a first motor 25 assembled on the mounting frame 23, and the output shaft of the first motor 25 is connected to the rotating shaft 24 through a pair of meshing gears.

[0047] The first motor 25 is started, and drives the rotating shaft 24 to rotate through a pair of gears. The rotating shaft 24 drives the annular mold 3 to rotate through the supporting sleeve 15.

[0048] The grinding unit includes a second motor 26 mounted on the two-axis translation mechanism 4 and having an output shaft in a vertical state, and a horizontal grinding wheel 27 mounted on the output shaft of the second motor 26 .

[0049] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0051] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An automobile drum brake pad external arc grinding machine, characterized in that: include: A workbench (1), a vertical annular mold (3) with an annular groove (2) recessed in the outer wall and capable of rotating around its own axis, a driving mechanism for driving the annular mold (3) to rotate, a grinding unit for grinding a brake pad (6) located in the annular groove (2), a two-axis translation mechanism (4) mounted on the workbench (1) and capable of driving the grinding unit to move vertically and to move the grinding unit close to the annular mold (3), a mounting plate (5) coaxially mounted on the bottom of the annular mold (3), a first clamp unit mounted on the upper surface of the mounting plate (5), and a second clamp unit mounted on the lower surface of the mounting plate (5); The first clamp unit comprises a plurality of arc-shaped positioning members (7) uniformly distributed along the circumferential direction of the annular mold (3) and capable of being mounted downwardly on the outer sides of the upper parts of corresponding brake pads (6); the second clamp unit comprises an annular positioning sleeve (8) coaxially arranged with the annular mold (3) and capable of being moved upwardly to be mounted on the outer sides of the lower parts of a plurality of brake pads (6).

2. The automobile drum brake pad external arc grinding machine according to claim 1, characterized in that: The top of the inner wall of the annular positioning sleeve (8) is provided with a first chamfered and expanded portion, and the bottom of the inner plate of the arc-shaped positioning piece (7) is provided with a second chamfered and expanded portion.

3. The automobile drum brake pad external arc grinding machine according to claim 1, characterized in that: The first fixture unit further comprises a center column (9) coaxially fixedly mounted on the mounting plate (5), a plurality of connecting frames (10) connected one-to-one with the plurality of arc-shaped positioning members (7), a sliding block (11) connected one-to-one with the plurality of connecting frames (10) and vertically slidably connected to the center column (9), and a plurality of vertical first driving push rods (12) mounted on the mounting plate (5) and having output ends fixedly connected to the corresponding connecting frames (10).

4. The automobile drum brake pad external arc grinding machine according to claim 3, characterized in that: The top of the central column (9) is coaxially equipped with a dust cover (13), and two adjacent arc-shaped positioning members (7) are in close contact with each other. The top of each arc-shaped positioning member (7) is connected to an arc-shaped plate (14) that is in sliding contact with the edge of the dust cover (13), and the edges of the two adjacent arc-shaped plates (14) are in close contact with each other.

5. The automobile drum brake pad external arc grinding machine according to claim 1, characterized in that: The second clamp unit further comprises a support sleeve (15) whose upper end is fixedly connected to the mounting plate (5) coaxially, a sliding plate (16) vertically slidably connected to the outer wall of the support sleeve (15) and fixedly connected to the annular positioning sleeve (8), a mounting plate (17) fixedly connected to the bottom of the support sleeve (15), a vertical second driving push rod (18) assembled on the mounting plate (17) and located inside the support sleeve (15), a connecting block (19) fixedly connected to the output end of the second driving push rod (18), and a connecting bolt assembled on the connecting block (19) and slidingly passing through the support sleeve (15) to connect with the sliding plate (16).

6. The automobile drum brake pad external arc grinding machine according to claim 5, characterized in that: The support sleeve (15) is provided with a vertical strip-shaped through-slot (20) for the link bolt to pass through, and the sliding plate (16) is equipped with a sliding sleeve (21) which is sleeved on the outside of the support sleeve (15) and covers the strip-shaped through-slot (20).

7. The automobile drum brake pad external arc grinding machine according to claim 5, characterized in that: The sliding plate (16) is provided with a plurality of debris removal grooves (22) running through it.

8. The automobile drum brake pad external arc grinding machine according to claim 5, characterized in that: The driving mechanism comprises a mounting frame (23) mounted on the bottom of the workbench (1), a vertical rotating shaft (24) fixedly connected to the mounting plate (17) and arranged coaxially with the annular mold (3) and connected to the mounting frame (23), and a first motor (25) mounted on the mounting frame (23), wherein the output shaft of the first motor (25) is connected to the rotating shaft (24) through a pair of meshing gears.

9. The automobile drum brake pad external arc grinding machine according to claim 1, characterized in that: The grinding unit comprises a second motor (26) assembled on a two-axis translation mechanism (4) with an output shaft in a vertical state, and a horizontal grinding wheel (27) assembled on the output shaft of the second motor (26).

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