A bonding tool for preventing deflection of drum brake pads

Abstract

The present invention discloses a bonding fixture for preventing drum brake pads from deflecting, comprising a support platform, a cylinder, a first push plate, and a bonding device. The first push plate is connected to one end of the cylinder; the bonding device comprises a pad, a pressure block, a second push plate, a spring, and a first baffle. The horizontal portion of the pad is provided with an arc-shaped groove where it meets the vertical portion. The depth of the arc-shaped groove is half the difference between the width of the horseshoe arc plate and the width of the lining material. The pressure block is further connected to a pressure block fixing plate on the side away from the pad. Two second push plates extending along both sides of the pressure block are connected to the pressure block fixing plate on both sides. The length of the first push plate is greater than the maximum distance between the two second push plates. A first baffle is provided on the side of the pressure block fixing plate away from the pressure block, and a spring is connected between the pressure block fixing plate and the first baffle. The fixture ensures that the lining material is always in a relatively centered position relative to the horseshoe arc plate. The elastic force of the spring compresses the lining material, thereby preventing the lining material from deflecting or falling off.

Description

Technical Field

[0001] The present invention relates to the technical field related to drum brake pad processing and manufacturing, and in particular to a bonding tool for preventing the deflection of a drum brake pad. Background Art

[0002] Existing drum brake pads include a shoe and a friction lining. The shoe includes an arc-shaped plate and a rib plate fixed to the inner side of the arc-shaped plate. The friction lining is bonded to the outer arc surface of the arc-shaped plate. However, during the processing of drum brake pads, especially when bonding the friction lining to the shoe, the relative position of the friction lining and the arc-shaped plate in the width direction of the arc-shaped plate is often not centered, and the friction lining tends to deviate to one side of the arc-shaped plate, which interferes with subsequent installation. The general solution now is to manually bond the friction lining to the center of the shoe's arc-shaped plate. However, this method has a low bonding force, which can easily cause the friction lining to deviate to one side of the arc-shaped plate during subsequent turnover, and can also easily cause the friction lining to fall off. In addition, this method cannot guarantee product consistency. This existing method can only achieve the bonding of a single product, which causes waiting waste during the product pressing process and reduces production efficiency. Summary of the Invention

[0003] The invention provides a drum brake pad anti-deflection bonding tool for solving the problem that the relative positions of the friction lining and the shoe arc plate are not centered during the processing of the drum brake pad.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions: a bonding tool for anti-deflection of drum brake pads, the brake pad includes a horseshoe arc plate and a lining material, including a support platform, a cylinder, a first push plate and a bonding device, the cylinder and the bonding device are both located on the support platform; one end of the cylinder is connected to the first push plate; the bonding device includes a pad, a pressure block, a second push plate, a spring and a first baffle, the pad includes an outward convex arc vertical part and a horizontal part that matches the horseshoe arc plate, and the horizontal part is provided with a shoe fork at the junction with the vertical part The arc groove in which the iron arc plate is inserted has a depth that is half the difference between the width of the horseshoe arc plate and the width of the lining material; the pressure block is facing the vertical part, and the side of the pressure block away from the pad is also connected to a pressure block fixing plate, and two second push plates extending along both sides of the pad are connected to the two sides of the pressure block fixing plate, and the length of the first push plate is greater than the maximum distance between the two second push plates, which is used to push the pressure block fixing plate through the second push plate during work; a first baffle is provided on the side of the pressure block fixing plate away from the pressure block, and a spring is connected between the pressure block fixing plate and the first baffle.

[0005] Optionally, a guide post is provided on a side of the pressing block fixing plate away from the pressing block, the guide post passes through the first baffle, and a retaining spring is connected to the free end of the guide post, and the spring is sleeved on the guide post.

[0006] Optionally, the bonding device further comprises a second baffle, and the second baffle is located on a side of the cushion block away from the pressing block.

[0007] Optionally, the bonding device further comprises a track, and the pad is slidably mounted on the track.

[0008] Optionally, there are multiple bonding devices.

[0009] Optionally, the bonding tool further includes a disc rotatable on the supporting platform, the cylinder is located on one side of the disc, and a plurality of bonding devices are distributed on the edge of the disc.

[0010] Optionally, the bonding tool also includes a transmission assembly, which includes a sleeve, a bearing and a transmission shaft. The bearing is inserted into a first through hole opened in the support platform, and the bearing flange outside the bearing is fixed on the support platform; the sleeve passes through the second through hole of the disc from bottom to top and is sleeved on the transmission shaft, the upper end of the sleeve is closed and fixed on the transmission shaft, the sleeve is fixed to the disc by a lock nut, and a flange is provided at the lower end opening of the sleeve for supporting the disc from below.

[0011] Optionally, the tooling further includes a motor and a reducer, and the transmission shaft is connected to the reducer via a key connection.

[0012] The present invention provides a bonding tool for preventing drum brake pads from deflecting. The pad and the pressure block can ensure that the lining material is always in a relatively central position in the width direction of the horseshoe arc plate during the processing process. In addition, the elastic force of the spring is used to compress the lining material, which effectively avoids the lining material from falling off easily during long-term storage or turnover. Moreover, the use of this tool ensures the consistency of the processed products and reduces the impact of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a top view of a drum brake pad anti-deflection bonding tool according to the first embodiment;

[0014] Figure 2 This is the working principle diagram of the tooling when the cylinder piston rod is retracted;

[0015] Figure 3 This is a diagram of the working principle of the tooling when the cylinder piston rod is extended;

[0016] Figure 4 It is the main view of the pad;

[0017] Figure 5 It is a top view of the pad;

[0018] Figure 6 This is a top view of a drum brake pad anti-deflection bonding tool according to a second embodiment;

[0019] Figure 7This is a top view of a drum brake pad anti-deflection bonding tool according to a third embodiment;

[0020] Figure 8 This is a front view of a drum brake pad anti-deflection bonding tool in accordance with a third embodiment;

[0021] Figure 9 It is a structural diagram of the transmission component.

[0022] Illustration:

[0023] 1. Support platform 2. Disc

[0024] 3. Cylinder bracket 4. Cylinder

[0025] 5. First push plate 6. Second baffle

[0026] 7. Track 8. Pad

[0027] 9. Pressing block 10. Pressing block fixing plate

[0028] 11. Spring 12. Guide sleeve

[0029] 13. First baffle 14. Second push plate

[0030] 15. Positioning pin 16. Circlip

[0031] 17. Lock nut 18. Bushing

[0032] 19. Motor 20. Reducer

[0033] 21. Bearing flange 22. Bearing

[0034] 23. Drive shaft 24. Pressure gauge

[0035] 25. Pressure regulating valve 26. Arc groove DETAILED DESCRIPTION

[0036] The technical solutions of specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate the present invention, rather than to limit the present invention.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] In the description of the present invention, it should be noted that “plurality” refers to two or more.

[0040] Example 1

[0041] like Figure 1 As shown, this embodiment provides a bonding tool for preventing drum brake pads from deflecting, including a support platform 1, a cylinder 4, a first push plate 5 and a bonding device, the cylinder 4 and the bonding device are both located on the support platform 1, and the cylinder 4 and the bonding device are in relative positions; the first push plate 5 is connected to the side of the cylinder 4 close to the bonding device, the bonding device includes a pad 8, a pressure block 9, a second push plate 14 and a spring 11, the pad 8 is located on the side of the first push plate 5 away from the cylinder 4, the pressure block 9 is located on the side of the pad 8 away from the cylinder 4, and the side of the pressure block 9 away from the pad 8 is also connected to a pressure block fixing plate 10, and two second push plates 14 extending toward the pad 8 are connected on both sides of the pressure block fixing plate 10, a guide column is provided on the side of the pressure block fixing plate 10 away from the pressure block 9, a spring 11 is sleeved on the guide column, and a first baffle 13 is provided on the side of the guide column away from the pressure block 9.

[0042] Furthermore, if Figure 1 As shown, the first baffle 13 is fixed to the support platform 1 by bolts and positioning pins 15. The positioning pins 15 play the role of positioning and quick replacement. The first baffle 13 is provided with a through hole. The guide sleeve 12 is sleeved in the through hole of the first baffle 13, and the guide sleeve 12 is fixed to the first baffle 13 by bolts. The guide post of the pressure block fixing plate 10 passes through the first baffle 13 through the guide sleeve 12, and the free end of the guide post is connected to the retaining spring 16. The spring 11 is sleeved on the guide post and is located between the pressure block fixing plate 10 and the first baffle 13. A groove is provided on the side where the guide post is connected to the retaining spring 16. The retaining spring 16 can be embedded in the groove. In this embodiment, the retaining spring 16 is specifically a C-shaped retaining ring, which is mainly used to prevent the guide post from falling out of the guide sleeve 12.

[0043] Furthermore, if Figure 1As shown, the cylinder 4 is fixed to the support platform 1 via the cylinder bracket 3. The cylinder bracket 3 is fixed to the support platform 1 via bolts. The cylinder 4 is also fixed to the cylinder bracket 3 via bolts. The first push plate 5 is also fixed to the cylinder 4 via bolts. The length of the first push plate 5 is greater than the maximum distance between the second push plates 14 to facilitate contact between the first push plate 5 and the second push plate 14. The force of the piston rod of the cylinder 4 extending and driving the first push plate 5 toward the bonding device is transmitted to the pressure block fixing plate 10, causing the pressure block fixing plate 10 and the pressure block 9 to move along the guide column, thereby compressing the spring 11 and leaving a certain space between the cushion block 8 and the pressure block 9, facilitating the placement of the lining material in the space between the cushion block 8 and the pressure block 9.

[0044] Furthermore, if Figure 4 and Figure 5 As shown, the spacer 8 has an overall outwardly convex arc-shaped structure, comprising a vertical portion and a horizontal portion. The horizontal portion is provided with an arc-shaped groove 26 where it meets the vertical portion. This arc-shaped groove 26 is used to embed the horseshoe's curved plate. The lining material is located outside the arc-shaped groove 26, near the side of the pressure block 9. The arc-shaped groove 26 is designed based on the horseshoe's curved plate. In this embodiment, the vertical portion is provided with a semicircular structure. This is primarily because curved plates generally have convex edges, which can be avoided during installation without interference. The depth of the arc-shaped groove 26 is half the difference between the width of the horseshoe's curved plate and the width of the lining material, ensuring that the lining material is always relatively centered across the width of the horseshoe's curved plate.

[0045] Furthermore, the bonding device also includes a second baffle 6 and a track 7, both of which are fixed to the support platform 1. The second baffle 6 is located on the side of the pad 8 closest to the cylinder 4. It primarily serves to block the horseshoe's curved plate, pressing the lining material against it during the compression process. The pad 8 is slidably mounted on the track 7, facilitating its movement. The pressure block 9 is made of rubber and effectively protects the lining material during the compression process, preventing it from shedding.

[0046] Specifically, the pressure block 9 is bolted to the pressure block fixing plate 10, and the second baffle 14 is also bolted to the pressure block fixing plate 10. The spacer 8 and pressure block 9 can be replaced according to different products, enabling pre-bonding of different products. Furthermore, the model of the spring 11 can also be adjusted to suit different products, allowing the magnitude of the clamping force to be adjusted by replacing the spring 11 model.

[0047] The working process and working principle of the present invention:

[0048] like Figure 2 and Figure 3As shown, the bonding device and the cylinder 4 are in relative positions, that is, the first push plate 5 and the second push plate 14 are at a vertical angle. When the cylinder 4 is started, the piston rod of the cylinder 4 extends and drives the first push plate 5 to move toward the bonding device. The first push plate 5 contacts the second push plate 14, and the force of the piston rod of the cylinder 4 extending and driving the first push plate 5 to move in the direction of the bonding device is transmitted to the pressure block fixing plate 10, thereby driving the pressure block fixing plate 10 and the pressure block 9 to move along the guide column direction. Since the first baffle 13 is fixed, the guide column can move in the through hole of the first baffle 13, thereby compressing the spring 11. At this time, a certain space is left between the pad 8 and the pressure block 9. The horseshoe arc plate is placed on the arc groove 26 on the pad 8, and the lining material after glue coating is placed in the space left between the pad 8 and the pressure block 9. When the horseshoe arc plate and the lining material are placed, the cylinder 4 is closed and the cylinder 4 retracts. The first push plate 5 is no longer in contact with the second push plate 14. Under the elastic force of the spring 11, the pressure block 9 moves toward the pad 8, thereby making the lining material adhere to the horseshoe arc plate. Finally, the cylinder 4 is activated, the spring 11 is compressed, and the pre-bonded workpieces are removed, completing the bonding operation.

[0049] Example 2

[0050] This embodiment shares many features with the first embodiment. The difference between this embodiment and the first embodiment is that no guide pins are provided on the pressure block fixing plate 10, and the spring 11 is directly fixed between the pressure block fixing plate 10 and the first baffle 13. The common features will not be described one by one here, and only the differences will be described.

[0051] This embodiment provides a bonding tool for preventing drum brake pads from deflecting. No guide column is set on the side of the pressure block fixing plate 10 away from the pressure block 9. One end of the spring 11 is fixed on the side of the pressure block fixing plate 10 away from the pressure block 9, and the other end of the spring 11 is fixed on the first baffle 13.

[0052] Furthermore, the length of the first push plate 5 is greater than the maximum distance between the second push plates 14, so that the first push plate 5 and the second push plate 14 can be easily contacted, and the piston rod of the cylinder 4 is extended to drive the first push plate 5 to move toward the bonding device. The force is transmitted to the pressure block fixing plate 10, so that the pressure block fixing plate 10 compresses the spring 11, and a certain space is left between the cushion block 8 and the pressure block 9, which makes it easier to place the lining material in the space left by the cushion block 8 and the pressure block 9.

[0053] Example 3

[0054] This embodiment has many of the same features as the first and second embodiments. The difference between this embodiment and the first and second embodiments is that there are multiple adhesive devices, and the adhesive devices are evenly distributed on the disk 2. The same features will not be described one by one here, and only the differences will be described.

[0055] The present embodiment provides a bonding tool for preventing drum brake pads from deflecting, and also includes multiple bonding devices and a disc 2, the disc 2 is located on the support platform 1, and the disc 2 can rotate on the support platform 1; the cylinder 4 is located on one side of the disc 2, and the side of the cylinder 4 close to the disc 2 is connected to a first push plate 5; multiple bonding devices are evenly dispersed on the edge of the disc 2, and the pads 8 in the bonding devices are facing the edge direction of the disc 2; the present embodiment specifically provides a three-station bonding tool for preventing drum brake pads from deflecting, which effectively avoids the waiting time waste of pressing time and improves production efficiency.

[0056] Furthermore, if Figure 9 The tooling also includes a transmission assembly, comprising a sleeve 18, a bearing flange 21, a bearing 22, and a transmission shaft 23. A first through-hole and a second through-hole are provided at the center of the support platform 1 and the disc 2, respectively. The transmission shaft 23 passes through the first through-hole and the second through-hole, thereby connecting to the support platform 1 and the disc 2. The bearing 22 passes through the first through-hole of the support platform 1, and the bearing flange 21 outside the bearing 22 can be fixed to the support platform 1 via bolts. The sleeve 18 passes through the second through-hole from bottom to top and fits over the transmission shaft 23. The upper end of the sleeve 18 is sealed and fixed to the transmission shaft 23 via bolts. The sleeve 18 is fixed to the disc 2 via a lock nut 17. The lower end opening of the sleeve 18 is provided with a flange for supporting the disc 2 from below. The sleeve 18 can further drive the disc 2 to rotate via a key connection, for example, by achieving a key connection with the disc 2 via the flange.

[0057] Furthermore, if Figure 8 As shown, this tooling also includes a motor 19, a reducer 20, a pressure gauge 24, and a pressure regulating valve 25. In this embodiment, the motor 19 and reducer 20 are bolted to the bottom surface of the support platform 1, while the pressure gauge 24 and pressure regulating valve 25 are fixed to the support frame below the support platform 1. The motor 19 and reducer 20 are connected in a transmission connection, with the drive shaft 23 connected to the reducer 20 via a key connection. The motor 19 provides the power for the drive shaft 23 to rotate, and the reducer 20 regulates the speed of the motor 19. The pressure gauge 24 and pressure regulating valve 25 are connected to the cylinder 4. The pressure gauge 24 displays the pre-bonding pressure of the horseshoe arc plate and the lining material, and the pressure regulating valve 25 can be used to adjust the pre-bonding pressure of the horseshoe arc plate and the lining material.

[0058] Furthermore, the tooling also includes a position sensor and a controller. The position sensor is located on support platform 1, on the side of cylinder 4 near disk 2. The position sensor monitors the positional relationship between the bonding device and cylinder 4 and transmits a signal to the controller, which in turn activates and deactivates motor 19, thereby controlling the rotation of disk 2. When disk 2 rotates to a position where the bonding device and cylinder 4 are opposite, the position sensor detects a signal, shuts off motor 19, and disk 2 stops rotating.

[0059] The working process and working principle of the present invention:

[0060] Taking the three-station bonding fixture for preventing deflection of drum brake pads provided in this embodiment as an example, the motor 19 is started, and the disc 2 is stopped at the position where the first bonding device and the cylinder 4 are relative to each other with the help of the position sensor. At this time, the disc 2 is in a stopped state, and the cylinder 4 is started. The piston rod of the cylinder 4 extends and drives the first push plate 5 to move along the direction of the bonding device. The first push plate 5 contacts the second push plate 14, and the first push plate 5 pushes the second push plate 14, thereby driving the pressure block fixing plate 10 and the pressure block 9 to move along the direction of the guide column, and the pressure block 9 is pressed. The fixing plate 10 compresses the spring 11. At this point, a certain space is left between the pad 8 and the pressure block 9. The horseshoe arc is placed on the arc groove 26 on the pad 8. The lining material after gluing is placed in the space left between the pad 8 and the pressure block 9. After the horseshoe arc and the lining material are placed, the cylinder 4 is closed and retracted. The first push plate 5 and the second push plate 14 are no longer in contact. Under the elastic force of the spring 11, the pressure block 9 moves toward the cylinder 4, so that the lining material is attached to the horseshoe arc. The position sensor monitors the signal, and the controller controls the motor 19 to start. The disk 2 rotates the second bonding device to this position and repeats the above operation. After completion, the position sensor monitors the signal again and the controller controls the motor 19 to start. The disk 2 rotates the third bonding device to this position and repeats the same operation. After completing one cycle, the first bonding device returns to this position. The cylinder 4 is started, and the spring 11 is compressed to remove the workpiece bonded by the first bonding device. The above operation is repeated, and the cycle continues.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A bonding tool for preventing deflection of a drum brake pad, wherein the brake pad comprises a shoe arc plate and a lining material, characterized in that: The cam is secured to the upper and lower ends of the cam, and the cam has a first end, a second end, and a second end, and the cam is secured to the lower ends of the cam. A guide post is provided on the side of the pressure block fixing plate away from the pressure block, the guide post passes through the first baffle, and a retaining spring is connected to the free end of the guide post; the spring is sleeved on the guide post; There are multiple bonding devices; The bonding tool further comprises a disc rotatable on a supporting platform, the cylinder is located on one side of the disc, and the plurality of bonding devices are distributed on the edge of the disc; The bonding tool also includes a transmission assembly, which includes a sleeve, a bearing and a transmission shaft. The bearing is inserted into a first through hole opened on the support platform, and the bearing is fixed to the support platform through an externally arranged bearing flange; the sleeve passes through the second through hole of the disc from bottom to top and is sleeved on the transmission shaft, the upper end of the sleeve is closed and fixed on the transmission shaft, and the sleeve is fixed to the disc through a lock nut. A flange is provided at the lower end opening of the sleeve for supporting the disc from below.

2. The anti-deflection bonding tool for drum brake pads according to claim 1, characterized in that: The bonding device further includes a second baffle, which is located on a side of the cushion block away from the pressing block.

3. The anti-deflection bonding tool for drum brake pads according to claim 2, characterized in that: The bonding device further comprises a track, and the pad is slidably mounted on the track.

4. The anti-deflection bonding tool for drum brake pads according to claim 1, characterized in that: The tooling also includes a motor and a reducer, and the transmission shaft is connected to the reducer by a key connection.

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