CN216991415U - Brake external grinding tool - Google Patents
Brake external grinding tool Download PDFInfo
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- CN216991415U CN216991415U CN202123320395.8U CN202123320395U CN216991415U CN 216991415 U CN216991415 U CN 216991415U CN 202123320395 U CN202123320395 U CN 202123320395U CN 216991415 U CN216991415 U CN 216991415U
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Abstract
The utility model discloses a brake excircle grinding tool, wherein a brake comprises a brake bottom plate and two brake shoes oppositely arranged on the brake bottom plate, and the brake is characterized in that: the device comprises a base plate, wherein a main positioning seat is arranged in the center of the base plate, a plurality of equal-height supporting blocks are arranged on the main positioning seat, a main positioning insert is arranged on the main positioning seat, a three-section type arc positioning surface is arranged on the main positioning insert, a central spindle is arranged in the center of the main positioning seat, a pressure plate is arranged above the main positioning insert, a plurality of pressure heads are arranged on the pressure plate, and the pressure plate is locked by nuts matched with the upper end of the central spindle; the brake shoe positioning device is characterized by further comprising a positioning column fixing plate arranged on a brake bottom plate of the brake, positioning columns are arranged at two ends of the positioning column fixing plate, and the two brake shoes are tensioned through threaded pull rods. The beneficial effects of the utility model include: the clamping is convenient, and positioning accuracy is high, has guaranteed that the outer disc is concentric with centre of rotation after the brake shoe location, has improved the machining precision, and then has ensured the performance of stopper.
Description
Technical Field
The utility model relates to the field of clamps, in particular to an excircle grinding tool for a brake.
Background
The brake with brake shoes belongs to a drum brake, and the drum brake comprises a brake bottom plate and brake shoes, wherein friction plates are arranged on the brake shoes. The shape of the brake shoe is half-moon-shaped, and when a brake is stepped on, the two half-moon-shaped brake shoes are outwards expanded under the action of the brake wheel cylinder to support the brake shoes to rub the inner wall of the brake drum to play a role in speed reduction or parking. The brake drum is a kind of iron casting shaped like a tambourine, which is fixed with the tyre and rotates at the same speed. During braking, the Brake Shoes (Brake Shoes) are pushed by hydraulic pressure to contact the inner edge of the Brake drum, and the friction force generated by the contact is used to restrain the rotation of the tire so as to achieve the purpose of braking. The drum brake is composed of brake bottom plate, brake cylinder, brake shoe, spring, pin and brake drum. Drum brakes are used in many rear wheels of small cars because of their low cost and high absolute braking force. Therefore, the machining precision of the excircle of the brake shoe directly influences the wear resistance and the braking effect of the brake shoe, and the clamp used in the excircle machining of the brake is the key for directly influencing the machining precision, so that the brake tool with high positioning precision is very necessary to design.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the brake excircle grinding tool which is convenient to clamp and high in positioning precision, and the precision of brake excircle grinding processing is obviously improved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a stopper external grinding frock, the stopper include the backing plate and two to the dress brake shoe on the backing plate, its characterized in that: the device comprises a base plate, wherein a main positioning seat is arranged in the center of the base plate, a plurality of equal-height supporting blocks are arranged on the main positioning seat, a main positioning insert is arranged on the main positioning seat, a three-section type arc positioning surface is arranged on the main positioning insert, a central spindle is arranged in the center of the main positioning seat, a pressure plate is arranged above the main positioning insert, a plurality of pressure heads are arranged on the pressure plate, and the pressure plate is locked by nuts matched with the upper end of the central spindle; the brake shoe positioning device is characterized by further comprising a positioning column fixing plate arranged on a brake bottom plate of the brake, positioning columns are arranged at two ends of the positioning column fixing plate, and the two brake shoes are tensioned through threaded pull rods.
Further, the pressure plate is positioned on the central core shaft through a fork opening, and a rubber pressing sleeve is arranged between the nut and the pressure plate.
Furthermore, the positioning column fixing plate is fixed on the brake chassis through an expansion mandrel.
Furthermore, the expansion mandrel comprises an expansion sleeve fixed at the center of the positioning column fixing plate, an expansion core is arranged in the expansion sleeve in a matched mode, the upper end of the expansion core penetrates through the positioning column fixing plate and is provided with a nut in a matched mode, the expansion core moves upwards to extrude the expansion sleeve to expand, and the brake chassis is provided with a nesting sleeve matched with the outer side of the expansion sleeve.
The beneficial effects of the utility model include: the clamping is convenient, and positioning accuracy is high, has guaranteed that the outer disc is concentric with centre of rotation after the brake shoe location, has improved the machining precision, and then has ensured the performance of stopper.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and the accompanying drawings.
A brake excircle grinding tool shown in figure 1 is used for positioning and clamping a brake to further grind an excircle. The brake includes the backing plate and two to the brake shoe of dress on the backing plate, and the frock includes bottom plate 1, is provided with main positioning seat 2 in the center of bottom plate 1 for confirm the centre of gyration. The main positioning seat 2 is provided with a plurality of equal-height supporting blocks 3, so that surface positioning is realized. The main positioning seat 2 is provided with a main positioning insert 4, the main positioning insert 4 is provided with a three-section type arc positioning surface, and when the brake bottom plate is sleeved on the main positioning insert 4, circumferential positioning is realized, the three-section type arc surface positioning precision is higher, and the clamp is easier to machine. A central core shaft 5 is arranged at the center of the main positioning seat 2, a pressure plate 6 is arranged above the main positioning insert 4, a plurality of pressure heads 7 are arranged on the pressure plate 6, and the pressure plate 6 is locked by a nut 11 matched with the upper end of the central core shaft 5 so as to tightly press the brake bottom plate; one end of the brake shoe is positioned along the rotating shaft of the brake shoe. And the other end of the brake bottom plate is provided with a positioning column fixing plate 8, and two ends of the positioning column fixing plate 8 are provided with positioning columns 9, so that the other ends of the brake shoes are positioned through the positioning columns 9, and the other two brake shoes are tensioned through a threaded pull rod 10, so that the positioning and clamping of the brake are realized.
As shown in fig. 1, the pressure plate 6 is positioned on the central spindle 5 through the fork, and a rubber pressing sleeve is arranged between the nut 11 and the pressure plate 6, and has a certain elasticity, so that each pressure head 7 on the pressure plate 6 is stressed.
Furthermore, the positioning column fixing plate 8 is fixed on the brake chassis through an expansion mandrel. The expansion mandrel comprises an expansion sleeve 12 fixed at the center of the positioning column fixing plate 8, an expansion core 13 is arranged in the expansion sleeve 12 in a matched mode, the upper end of the expansion core 13 penetrates through the positioning column fixing plate 8, a nut is arranged in a matched mode, the nut is rotated, the expansion core 13 moves upwards to extrude the expansion sleeve 12 to expand, and therefore the expansion core is matched with a hole in a braking chassis in an expanding mode, and positioning errors caused by deviation of a positioning axis are avoided. In order to further improve the positioning precision, the brake chassis is provided with a nesting sleeve matched with the outer side of the expansion sleeve 12.
The technical solutions provided by the embodiments of the present invention are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present invention, and the descriptions of the embodiments above are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (4)
1. The utility model provides a stopper external grinding frock, the stopper include the backing plate and two to the dress brake shoe on the backing plate, its characterized in that: the positioning device comprises a base plate (1), wherein a main positioning seat (2) is arranged in the center of the base plate (1), a plurality of equal-height supporting blocks (3) are arranged on the main positioning seat (2), a main positioning insert (4) is arranged on the main positioning seat (2), a three-section type arc positioning surface is arranged on the main positioning insert (4), a central spindle (5) is arranged in the center of the main positioning seat (2), a pressure plate (6) is arranged above the main positioning insert (4), a plurality of pressure heads (7) are arranged on the pressure plate (6), and the pressure plate (6) is locked through a nut (11) matched with the upper end of the central spindle (5); the brake shoe is characterized by further comprising a positioning column fixing plate (8) arranged on the brake bottom plate of the brake, positioning columns (9) are arranged at two ends of the positioning column fixing plate (8), and the two brake shoes are tensioned through threaded pull rods (10).
2. The brake outer circle grinding tool according to claim 1, characterized in that: the pressure plate (6) is positioned on the central core shaft (5) through a fork opening, and a rubber pressure sleeve is arranged between the nut (11) and the pressure plate (6).
3. The brake outer circle grinding tool according to claim 1, characterized in that: and the positioning column fixing plate (8) is fixed on the brake chassis through an expansion mandrel.
4. The brake outer circle grinding tool according to claim 3, characterized in that: the expansion mandrel comprises an expansion sleeve (12) fixed at the center of the positioning column fixing plate (8), an expansion core (13) is arranged in the expansion sleeve (12) in a matched mode, the upper end of the expansion core (13) penetrates through the positioning column fixing plate (8), a nut and a rotating nut are arranged in a matched mode, the expansion core (13) moves upwards to extrude the expansion sleeve (12) to expand, and nesting matched with the outer side of the expansion sleeve (12) is arranged on the brake chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123320395.8U CN216991415U (en) | 2021-12-27 | 2021-12-27 | Brake external grinding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123320395.8U CN216991415U (en) | 2021-12-27 | 2021-12-27 | Brake external grinding tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216991415U true CN216991415U (en) | 2022-07-19 |
Family
ID=82386273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123320395.8U Active CN216991415U (en) | 2021-12-27 | 2021-12-27 | Brake external grinding tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216991415U (en) |
-
2021
- 2021-12-27 CN CN202123320395.8U patent/CN216991415U/en active Active
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