CN210623424U - Quick-change double-pin drum brake - Google Patents
Quick-change double-pin drum brake Download PDFInfo
- Publication number
- CN210623424U CN210623424U CN201921627261.0U CN201921627261U CN210623424U CN 210623424 U CN210623424 U CN 210623424U CN 201921627261 U CN201921627261 U CN 201921627261U CN 210623424 U CN210623424 U CN 210623424U
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- brake shoe
- brake
- shoe
- bottom plate
- quick
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Abstract
The utility model relates to a drum brake technical field especially relates to quick change type double round pin drum brake, including the brake bottom plate, the brake bottom plate is provided with the left brake shoe and the right brake shoe of symmetry, left side brake shoe or right brake shoe in one end pass through the step axle with the brake bottom plate rotates to connect to it is fixed through taut retaining spring, left side brake shoe or right side brake shoe is provided with the gyro wheel at the other end, the gyro wheel with set up in the cam of brake bottom plate is tangent, left side brake shoe or the outside of right side brake shoe is provided with the brake block. The utility model discloses an opening brake shoe can prevent the jamming not return to be convenient for maintain, the double pin can make two brake shoes open range bigger, plays the braking action better.
Description
Technical Field
The utility model relates to a drum brake technical field especially relates to quick change type double round pin drum brake.
Background
The drum brake is widely applied to heavy trucks, has severe working environment and high maintenance frequency, and adopts the working principle that a middle brake shoe is outwards opened to enable a brake sheet to be in friction with a hub to realize braking; the brake shoe adopting the arc-shaped groove structure is easy to fall off due to structural factors or cannot be tensioned enough due to single pin assembly during braking.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art not enough, and provide quick change type double pin drum brake, it is through the double pin supporting right and left brake shoe to adopt major arc groove installation gyro wheel, thereby obtain better result of use.
The utility model provides a technical scheme that its technical problem adopted is: the quick-change double-pin drum brake comprises a brake bottom plate, wherein the brake bottom plate is provided with a left brake shoe and a right brake shoe which are symmetrical, one end of the left brake shoe or the right brake shoe is a supporting end and is provided with a semicircular groove, and the other end of the left brake shoe or the right brake shoe is a driving end and is provided with a major arc groove; the brake base plate is provided with two step shafts, the semicircular grooves of the left brake shoe or the right brake shoe are clamped with the step shafts, the left brake shoe or the right brake shoe respectively rotate around the step shafts clamped with the left brake shoe or the right brake shoe, the left brake shoe and the right brake shoe encircle the center of the brake base plate in an arc shape, and the left brake shoe or the right brake shoe is provided with retaining springs on the upper surface and the lower surface of the supporting end; the major arc groove of the left brake shoe or the right brake shoe is connected with a roller in a clamping manner, the other end of the brake bottom plate is provided with a cam which is rotationally connected with the brake bottom plate, the two rollers are tangent to the cam, and the left brake shoe and the right brake shoe are provided with return springs at the driving ends; and a brake pad is arranged on the outer side of the left brake shoe or the right brake shoe.
Further, the retaining spring and the return spring are fixed to a web of the left brake shoe or the right brake shoe through spring pins.
Further, the two step shafts are symmetrical with respect to a plane formed by the axis of the cam and the center of the backing plate.
Further, the central angle corresponding to the major arc groove is 198 °.
Further, the roller is a roller with a fixed central shaft.
Furthermore, the step shaft is a cylinder with a thick middle part and thin two ends.
Further, the cam is an involute cam.
The utility model has the advantages that: the quick-change double-pin drum brake comprises a brake bottom plate, wherein the brake bottom plate is provided with a left brake shoe and a right brake shoe which are symmetrical, one end of the left brake shoe or the right brake shoe is a supporting end and is provided with a semicircular groove, and the other end of the left brake shoe or the right brake shoe is a driving end and is provided with a major arc groove; the brake bottom plate is provided with two step shafts, the semicircular groove of the left brake shoe or the right brake shoe is clamped with the step shafts, the left brake shoe and the right brake shoe encircle the center of the brake bottom plate in an arc shape, and the left brake shoe or the right brake shoe is provided with retaining springs on the upper surface and the lower surface of the supporting end; the major arc groove of the left brake shoe or the right brake shoe is connected with a roller in a clamping manner, the other end of the brake bottom plate is provided with a cam which is rotationally connected with the brake bottom plate, the two rollers are tangent to the cam, and the left brake shoe and the right brake shoe are provided with return springs at the driving ends; and a brake pad is arranged on the outer side of the left brake shoe or the right brake shoe. The utility model discloses an opening brake shoe can prevent the jamming not return to be convenient for maintain, the double pin can make two brake shoes open range bigger, plays the braking action better.
Drawings
Fig. 1 is a perspective view of a quick-change double-pin drum brake of the present invention;
fig. 2 is a front view of the quick-change double-pin drum brake of the present invention;
fig. 3 is a bottom view of fig. 2.
Description of reference numerals:
1-brake bottom plate, 2-left brake shoe, 3-right brake shoe, 4-bearing end, 5-semicircular groove, 6-step shaft, 7-retaining spring, 8-driving end, 9-optimum arc groove, 10-roller, 11-cam, 12-return spring and 13-brake pad.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and the embodiments, and is not intended to limit the scope of the invention.
As shown in fig. 1 to 3, the quick-change double-pin drum brake of the present embodiment includes a brake base plate 1, the brake base plate 1 is provided with a left brake shoe 2 and a right brake shoe 3 which are symmetrical, one end of the left brake shoe 2 or the right brake shoe 3 is a bearing end 4 and is provided with a semicircular groove 5, and the other end of the left brake shoe 2 or the right brake shoe 3 is a driving end 8 and is provided with a major arc groove 9; the brake base plate 1 is provided with two step shafts 6, the semicircular groove 5 of the left brake shoe 2 or the right brake shoe 3 is clamped with the step shafts 6, the left brake shoe 2 and the right brake shoe 3 surround the center of the brake base plate 1 in an arc shape, and the left brake shoe 2 or the right brake shoe 3 is provided with retaining springs 7 on the upper surface and the lower surface of the supporting end 4; a roller 10 is clamped in the major arc groove 9 of the left brake shoe 2 or the right brake shoe 3, a cam 11 rotationally connected with the brake base plate 1 is arranged at the other end of the brake base plate 1, the two rollers 10 are tangent to the cam 11, and a return spring 12 is arranged at the driving end 8 of the left brake shoe 2 and the right brake shoe 3; and a brake pad 13 is arranged on the outer side of the left brake shoe 2 or the right brake shoe 3.
In operation, the cam 11 is rotated to move the roller 10 against the cam outwards, so that the left brake shoe 2 and the right brake shoe 3 are rotated around the step shaft 6 to be unfolded outwards, and the brake pad 13 is contacted with a hub, so as to perform a braking function; the step shafts 6 penetrate through the brake bottom plate 1, thin parts at two ends are matched with the semicircular grooves 5, the holding spring 7 is in a tensioned state, and the two step shafts 6 are adopted, so that the central angle corresponding to the arc-shaped grooves matched with the step shafts can be any angle, the step shafts are prevented from falling off in use, and the left brake shoe 2 and the right brake shoe 3 cannot interfere with each other when being opened; the roller 10 is of an integral type, a central shaft of the roller 10 is in clearance fit with the major arc groove 9, press fitting is adopted during installation, the roller 10 can be prevented from falling off in the use process, the roller 10 is prevented from entering sand, in addition, the brake shoe is of an arc groove structure, the sand can be automatically extruded in the use process, and therefore the left brake shoe 2 and the right brake shoe 3 are prevented from being blocked after braking and cannot be pulled back by the return spring 12. The left brake shoe 2 and the right brake shoe 3 are axially supported by the backing plate 1 so as not to swing in the axial direction, and the brake plate 13 is fixed to the left brake shoe 2 or the right brake shoe 3 by a countersunk rivet.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. Quick change type double pin drum brake, its characterized in that: the brake comprises a brake bottom plate (1), wherein the brake bottom plate (1) is provided with a left brake shoe (2) and a right brake shoe (3) which are symmetrical, one end of the left brake shoe (2) or the right brake shoe (3) is a supporting end (4) and is provided with a semicircular groove (5), and the other end of the left brake shoe (2) or the right brake shoe (3) is a driving end (8) and is provided with a major arc groove (9); the brake bottom plate (1) is provided with two step shafts (6), the semicircular groove (5) of the left brake shoe (2) or the right brake shoe (3) is clamped with the step shafts (6), the left brake shoe (2) and the right brake shoe (3) encircle the center of the brake bottom plate (1) in an arc shape, and retaining springs (7) are arranged on the upper surface and the lower surface of the supporting end (4) of the left brake shoe (2) or the right brake shoe (3); the major arc groove (9) of the left brake shoe (2) or the right brake shoe (3) is clamped with a roller (10), the other end of the brake bottom plate (1) is provided with a cam (11) which is rotatably connected with the brake bottom plate (1), the two rollers (10) are tangent to the cam (11), and the left brake shoe (2) and the right brake shoe (3) are provided with a return spring (12) at the driving end (8); and a brake pad (13) is arranged on the outer side of the left brake shoe (2) or the right brake shoe (3).
2. The quick-change double-pin drum brake according to claim 1, characterized in that: the retaining spring (7) and the return spring (12) are fixed to a web of the left brake shoe (2) or the right brake shoe (3) through spring pins.
3. The quick-change double-pin drum brake according to claim 1, characterized in that: the two step shafts (6) are symmetrical to a plane formed by the centers of the brake base plates (1) about the axis of the cam (11).
4. The quick-change double-pin drum brake according to claim 1, characterized in that: the central angle corresponding to the major arc groove (9) is 198 degrees.
5. The quick-change double-pin drum brake according to claim 1, characterized in that: the roller (10) is a roller with a fixed central shaft.
6. The quick-change double-pin drum brake according to claim 1, characterized in that: the step shaft (6) is a cylinder with a thick middle part and thin two ends.
7. The quick-change double-pin drum brake according to claim 1, characterized in that: the cam (11) is an involute cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921627261.0U CN210623424U (en) | 2019-09-27 | 2019-09-27 | Quick-change double-pin drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921627261.0U CN210623424U (en) | 2019-09-27 | 2019-09-27 | Quick-change double-pin drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210623424U true CN210623424U (en) | 2020-05-26 |
Family
ID=70765482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921627261.0U Active CN210623424U (en) | 2019-09-27 | 2019-09-27 | Quick-change double-pin drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210623424U (en) |
-
2019
- 2019-09-27 CN CN201921627261.0U patent/CN210623424U/en active Active
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