CN212985853U - Hydraulic multi-disc brake with front end cover - Google Patents
Hydraulic multi-disc brake with front end cover Download PDFInfo
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- CN212985853U CN212985853U CN202020974680.8U CN202020974680U CN212985853U CN 212985853 U CN212985853 U CN 212985853U CN 202020974680 U CN202020974680 U CN 202020974680U CN 212985853 U CN212985853 U CN 212985853U
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Abstract
A hydraulic multi-disc brake with a front cover, comprising: a front end cover and a hydraulic multi-disc brake; the front end cover covers one side of the hydraulic multi-disc brake connecting outer shaft. The front end cover includes: the body, the body inboard is provided with the boss, and the body outside is provided with the tang, and the tang is the recess shape. The centers of the body, the boss and the spigot are provided with through holes for penetrating the outer shaft. Two first screw holes are symmetrically formed in the inner side of the body, and the first screw holes are not through holes. Along the circumference of body lateral wall, equally divide on the body of the left and right sides between two first screw holes of symmetry and do not seted up 6 first through-holes, and 6 first through-holes on left 6 first through-holes and right side are two liang of correspondences respectively, and control two first through-holes that correspond and all be about two first screw hole symmetries. Add front end housing's hydraulic pressure multi-disc brake have connect reliable, simple, convenient to use's characteristics such as installation, but wide application in trades such as mining.
Description
Technical Field
The utility model relates to a braking technique especially relates to a add hydraulic pressure multi-disc brake of front end housing.
Background
At present, a hydraulic multi-disc brake is an important part of underground automatic mining equipment in the coal industry. In practical application, the storage and the delivery of the hydraulic multi-disc brake are all in a state that the components of the hydraulic multi-disc brake are in a loose state. In the process of connecting and installing the hydraulic multi-disc brake and the coal mining machine, all parts are required to be installed on a brake shaft of the coal mining machine in sequence manually, and due to the fact that the number of the parts is large, the installation accuracy requirement is high, and the problem of installation failure is prone to occurring when an installer installs the brake shaft; even more, there is a problem that some parts are damaged. In addition, a problem of poor braking effect also arises. Meanwhile, the operation process of carrying out the pressure resistance experiment one by one before leaving the factory of the hydraulic multi-disc brake is very complicated.
Therefore, in the prior art, the installation of the hydraulic multi-disc brake has the problems of complex installation, inconvenient operation, unreliable connection, poor braking effect and the like.
Disclosure of Invention
In view of this, the main object of the present invention is to provide a hydraulic multi-disc brake with a front end cover, which has reliable connection, simple installation and convenient operation.
In order to achieve the above object, the utility model provides a technical scheme does:
a hydraulic multi-disc brake with a front cover, comprising: a front end cover and a hydraulic multi-disc brake; the front end cover is covered on one side of the hydraulic multi-disc brake connecting outer shaft; one side of the hydraulic multi-disc brake, which is connected with the outer shaft, is used as the front end side of the hydraulic multi-disc brake with the front end cover; correspondingly, one side of the hydraulic multi-disc brake, which is far away from the outer shaft, is used as the rear end side of the hydraulic multi-disc brake with the front end cover;
the front end cover includes: the body 19, there are bosses 21 on the inboard of body 19, there are rabbets 22 on the outside of body 19, the rabbets 22 are groove-shaped, the cross sectional shape of the body 19, the cross sectional shape of the boss 21, the cross sectional shape of the rabbets 22 are all circular rings, and the cross sectional shape of the body 19, the cross sectional shape of the boss 21, the cross sectional shape of the rabbets 22 in the same cross section are all concentric circular rings; the body 19, the boss 21 and the spigot 22 are of an integral structure; the centers of the body 19, the boss 21 and the spigot 22 are provided with a through hole 24 for penetrating through the outer shaft; two first threaded holes 20 are symmetrically formed in the inner side of the body 19, and the two first threaded holes 20 are not through holes; along the circumference of the side wall of the body 19, 6 first through holes 23 are respectively arranged on the body 19 on the left side and the right side between the two symmetrical first threaded holes 20, the 6 first through holes 23 on the left side correspond to the 6 first through holes 23 on the right side in a pairwise manner, and the two corresponding first through holes 23 on the left side and the right side are symmetrical about the two first threaded holes 20.
To sum up, add the hydraulic pressure multi-disc brake of front end housing and install in the braking axle of outside coal-winning machine walking case, promptly, outer epaxial. Front end cap top spigot's design can guarantee add the reliable connection of hydraulic pressure multi-disc brake and coal-winning machine of front end cap. In addition, install on the coal-winning machine the utility model discloses during the hydraulic pressure multi-disc brake of front end housing, operating personnel can embolia coal-winning machine brake axle with it once only, and the installation is simple, convenient operation.
Drawings
Fig. 1 is a front sectional view of a hydraulic multi-disc brake with a front end cover according to the present invention.
Fig. 2 is a view a-a of a hydraulic multi-disc brake with a front end cover according to the present invention.
Fig. 3 is a schematic diagram of the overall composition structure of the front end cover of the present invention.
Fig. 4 is a right side view of the front end cap of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a front sectional view of a hydraulic multi-disc brake with a front end cover according to the present invention. Fig. 2 is a view a-a of a hydraulic multi-disc brake with a front end cover according to the present invention. Fig. 3 is a schematic diagram of the overall composition structure of the front end cover of the present invention. Fig. 4 is a right side view of the front end cap of the present invention. As shown in fig. 1, fig. 2, fig. 3, and fig. 4, the present invention provides a hydraulic multi-disc brake with a front end cover, including: a front end cover and a hydraulic multi-disc brake; the front end cover is covered on one side of the hydraulic multi-disc brake connecting outer shaft; one side of the hydraulic multi-disc brake, which is connected with the outer shaft, is used as the front end side of the hydraulic multi-disc brake with the front end cover; correspondingly, one side of the hydraulic multi-disc brake, which is far away from the outer shaft, is used as the rear end side of the hydraulic multi-disc brake with the front end cover;
the front end cover includes: the body 19, there are bosses 21 on the inboard of body 19, there are rabbets 22 on the outside of body 19, the rabbets 22 are groove-shaped, the cross sectional shape of the body 19, the cross sectional shape of the boss 21, the cross sectional shape of the rabbets 22 are all circular rings, and the cross sectional shape of the body 19, the cross sectional shape of the boss 21, the cross sectional shape of the rabbets 22 in the same cross section are all concentric circular rings; the body 19, the boss 21 and the spigot 22 are of an integral structure; the centers of the body 19, the boss 21 and the spigot 22 are provided with a through hole 24 for penetrating through the outer shaft; two first threaded holes 20 are symmetrically formed in the inner side of the body 19, and the two first threaded holes 20 are not through holes; along the circumference of the side wall of the body 19, 6 first through holes 23 are respectively arranged on the body 19 on the left side and the right side between the two symmetrical first threaded holes 20, the 6 first through holes 23 on the left side correspond to the 6 first through holes 23 on the right side in a pairwise manner, and the two corresponding first through holes 23 on the left side and the right side are symmetrical about the two first threaded holes 20.
The utility model discloses in, the front end housing external diameter is less than or equal to hydraulic pressure multi-disc brake outline diameter.
In the utility model, the boss 21 is used for realizing the accurate positioning between the front end cover and the hydraulic multi-disc brake; the seam allowance 22 is used for realizing accurate positioning between the hydraulic multi-disc brake of the front end cover and an external coal mining machine walking box shell.
In a word, add hydraulic pressure multi-disc brake of front end housing and install on the braking axle (promptly, outer axle) of outside coal-winning machine walking case. Front end cap top spigot's design can guarantee add the reliable connection of hydraulic pressure multi-disc brake and coal-winning machine of front end cap. In addition, install on the coal-winning machine the utility model discloses during the hydraulic pressure multi-disc brake of front end housing, operating personnel can embolia coal-winning machine brake axle with it once only, and the installation is simple, convenient operation.
The utility model discloses in, hydraulic pressure multi-disc brake includes: the device comprises a shell 1, a rear end cover 8, a cylinder 6, a piston 5, 7 dynamic friction plates 18, 8 static friction plates 17, 6 disc springs 11, 2 fastening bolts 14, 12 connecting bolts 9, 2 manual release bolts 10 and 2 manual release plugs 12; wherein, 7 dynamic friction plates 18, 8 static friction plates 17 and 6 disc springs 11 are all circular rings; the rear end cover 8 is covered on the rear end side of the hydraulic multi-disc brake with the front end cover;
the whole shell 1 is cylindrical, six sections of first grooves are axially arranged on the inner wall of the shell 1 close to the outer shaft side along the shell 1, the six sections of first grooves are uniformly distributed along the circumferential direction of the shell 1, and a cylinder 6, a piston 5, 7 dynamic friction plates 18, 8 static friction plates 17 and 6 disc springs 11 are all arranged in the shell 1; 6 outward bulges are uniformly arranged on the outer edge of the static friction plate 17 along the circumferential direction, and 3 inward bulges are uniformly arranged on the inner edge of the dynamic friction plate 18 along the circumferential direction; 6 first grooves on the inner side of the shell 1 correspond to 6 outward protrusions on the outer edge of each static friction plate 17, 3 inward protrusions on the inner edge of each dynamic friction plate 18 correspond to 3 second grooves on the outer shaft, the outward protrusions of 8 static friction plates 17 are correspondingly inserted into the first grooves, the inward protrusions of 7 dynamic friction plates 18 are correspondingly inserted into the second grooves, and one dynamic friction plate 18 is arranged between two adjacent static friction plates 17; the inner diameter of the static friction plate 17 and the inner diameter of the dynamic friction plate 18 are both larger than the outer diameter of the outer shaft.
The utility model discloses in, 8 the extroversion of individual friction disc 17 is protruding all to correspond to peg graft specifically in first recess and be: the outward protrusions of the 8 static friction plates 17 are correspondingly sleeved in the first grooves through splines. The inward protrusions of the 7 dynamic friction plates 18 are correspondingly inserted into the second grooves, and the inward protrusions are specifically as follows: the inward protrusions of the 7 dynamic friction plates 18 are correspondingly inserted into the spline grooves of the outer shaft.
A cylinder body 6 and a piston 5 are arranged in the inner space of the shell 1 far away from the outer shaft side, the cylinder body 6 and the piston 5 are arranged in parallel along the direction vertical to the axis of the shell 1, and a gap for containing hydraulic oil is reserved between the cylinder body 6 and the piston 5; a third groove for accommodating the outer shaft is formed in the side end, close to the static friction plate 17, of the piston 5 along the axis direction of the shell 1, and the inner diameter of the third groove is the same as the outer diameter of the outer shaft; a section of annular spring groove is symmetrically formed in the side wall of the piston 5 far away from the side end of the static friction plate 17, and six disc springs are arranged in the spring groove back to back or in a mouth to mouth manner; and 2 second threaded holes are symmetrically formed in the outer side of the spring groove close to the cylinder body 6 on the side wall of the piston 5 far away from the side end of the static friction plate 17, and 2 third threaded holes are symmetrically formed in the outer side of the spring groove far away from the cylinder body 6 on the side wall of the piston 5 far away from the side end of the static friction plate 17.
In practice, the third recess is provided in the piston 5 to facilitate the installation of the outer shaft.
Along the axial direction of the shell 1, 12 second through holes and 2 third through holes are formed in the side wall of the shell 1; 12 second through holes, 12 first through holes 23 on the front end cover and 12 connecting bolts 9 are in one-to-one correspondence, and 2 third through holes, 2 first threaded holes 20 on the front end cover and 2 fastening bolts 14 are in one-to-one correspondence; 2 manual release bolts 10 correspond to 2 second threaded holes one to one, and 2 manual release plugs 12 correspond to 2 third threaded holes one to one.
The rear end cover 8 is respectively provided with 18 fourth through holes; the first threaded holes 20 are respectively provided with 12 fourth through holes, 2 second threaded holes and 2 third threaded holes, wherein the 12 fourth through holes correspond to the 12 second through holes one by one, the 2 fourth through holes correspond to the 2 third through holes one by one, the 2 fourth through holes correspond to the 2 second threaded holes one by one, and the 2 through holes correspond to the 2 third threaded holes one by one; the central part of the inner side of the rear end cover 8 is separately provided with a fourth groove, and the fourth groove corresponds to the piston 5.
The 12 connecting bolts 9 respectively and correspondingly penetrate through 12 fourth through holes on the rear end cover 8, 12 second through holes on the shell 1 and 12 first through holes 23 on the front end cover from back to front; 2 fastening bolts 14 respectively penetrate through 2 fourth through holes on the rear end cover 8 and 2 third through holes on the shell 1 from back to front in sequence and correspondingly penetrate through 2 first threaded holes 20 on the front end cover; the 2 manual release bolts 10 respectively penetrate through the 2 fourth through holes on the rear end cover 8 from back to front in sequence and correspondingly penetrate through the 2 second threaded holes; 2 manual release plug 12 respectively by after corresponding 2 fourth through holes on the rear end cover 8 of passing forward in proper order, correspond 2 third screw holes of penetrating.
In practical application, 12 connecting bolts 9 correspondingly penetrating through 12 first through holes 23 on the front end cover are further fixed with the shell of the coal mining walking box machine.
In practical application, when the coal mining machine normally works, hydraulic oil enters a gap between the cylinder body and the piston through the oil inlet/outlet hole, the piston is pushed to move by the hydraulic oil, the piston compresses the disc spring, so that the dynamic friction plate is separated from the static friction plate, and the hydraulic multi-disc brake with the front end cover is in a brake release state; further, the coal mining machine walks and excavates. When an oil way is cut off, under the action of the elastic force of the disc spring, the disc spring pushes the piston to extrude hydraulic oil out of a gap between the cylinder body and the piston, meanwhile, the piston pressure presses the dynamic friction plate and the static friction plate, and friction torque is generated between the static friction plate and the dynamic friction plate to enable the hydraulic multi-disc brake with the front end cover to be in a braking state; further, the shearer stops traveling due to being braked. It can be seen that the whole packaging effect of the hydraulic multi-disc brake with the front end cover is very good, and the brake efficiency and the service life can not be improved due to the problem that the movable friction disc and the static friction disc which are caused by installation are extruded.
In practical applications, the 2 manual release bolts 10 are not used, that is, the 2 manual release bolts 10 are not installed in the corresponding fourth through holes and second threaded holes, and the 2 manual release plugs 12 are installed in the corresponding fourth through holes and third threaded holes. Only after the 2 manual release plugs 12 are taken out of the corresponding fourth through holes and third threaded holes, the 2 manual release bolts 10 are installed in the corresponding fourth through holes and second threaded holes.
The utility model discloses in, hydraulic pressure multi-disc brake still includes: 2 plug bolts 2, a first gasket 3, a second gasket 13, a third gasket 4 and a fourth gasket 7; wherein the content of the first and second substances,
on the casing 1 lateral wall that corresponds in static friction piece 17 and dynamic friction piece 18 position, along the axial direction of perpendicular to casing 1, 2 observation holes have been seted up to the symmetry, and 2 plug 2 are installed respectively in 2 observation holes. Through the observation hole, a maintainer can observe the abrasion condition of the static friction plate 17 and the dynamic friction plate 18. A first gasket 3 is arranged between the plug 2 and the corresponding observation hole; a second gasket 13 is arranged between the manual release plug 12 and the corresponding fourth through hole; a third gasket 4 and a fourth gasket 7 are arranged between the cylinder 6 and the piston 5. The third gasket 4 and the fourth gasket 7 can prevent hydraulic oil from leaking.
The utility model discloses in, hydraulic pressure multi-disc brake still includes: an oil plug 16 and a copper pad 15; wherein, on the opposite casing 1 sidewall of cylinder block 6, along the direction perpendicular to axial of the casing 1, offer 1 and is used for installing the oil inlet/outlet port of the oil plug 16; a copper pad 15 is arranged between the oil inlet/outlet hole opening and the oil plug 16. In practical application, when the hydraulic multi-disc brake with the front end cover is not used, the oil inlet/outlet hole can be sealed by the oil plug 16.
In each of the above technical scheme of the utility model, outer axle is the braking axle of outside coal mining walking case.
In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A hydraulic multi-disc brake with a front end cover is characterized by comprising: a front end cover and a hydraulic multi-disc brake; the front end cover is covered on one side of the hydraulic multi-disc brake connecting outer shaft; one side of the hydraulic multi-disc brake, which is connected with the outer shaft, is used as the front end side of the hydraulic multi-disc brake with the front end cover; correspondingly, one side of the hydraulic multi-disc brake, which is far away from the outer shaft, is used as the rear end side of the hydraulic multi-disc brake with the front end cover;
the front end cover includes: the novel steel pipe fitting is characterized by comprising a body (19), wherein a boss (21) is arranged on the inner side of the body (19), a spigot (22) is arranged on the outer side of the body (19), the spigot (22) is groove-shaped, the cross section of the body (19), the cross section of the boss (21) and the cross section of the spigot (22) are all circular rings, and the cross section of the body (19), the cross section of the boss (21) and the cross section of the spigot (22) on the same cross section are all concentric circular rings; the body (19), the boss (21) and the spigot (22) are of an integral structure; the centers of the body (19), the boss (21) and the spigot (22) are provided with a through hole (24) for passing through the outer shaft; two first threaded holes (20) are symmetrically formed in the inner side of the body (19), and the two first threaded holes (20) are not through holes; along the circumference of body (19) lateral wall, equally divide on body (19) of the left and right sides between two first screw holes (20) of symmetry and respectively seted up 6 first through-hole (23), left 6 first through-hole (23) and right 6 first through-hole (23) are two liang of respectively corresponding, and control two first through-holes (23) that correspond and all be about two first screw holes (20) symmetry.
2. The front-end capped hydraulic multi-disc brake of claim 1, comprising: the device comprises a shell (1), a rear end cover (8), a cylinder body (6), a piston (5), 7 dynamic friction plates (18), 8 static friction plates (17), 6 disc springs (11), 2 fastening bolts (14), 12 connecting bolts (9), 2 manual release bolts (10) and 2 manual release screw plugs (12); wherein, 7 dynamic friction plates (18), 8 static friction plates (17) and 6 disc springs (11) are all circular; the rear end cover (8) is covered on the rear end side of the hydraulic multi-disc brake with the front end cover;
the shell (1) is integrally cylindrical, six sections of first grooves are axially arranged on the inner wall of the shell (1) close to the outer shaft side along the shell (1), the six sections of first grooves are uniformly distributed along the circumferential direction of the shell (1), and a cylinder body (6), a piston (5), 7 dynamic friction plates (18), 8 static friction plates (17) and 6 disc springs (11) are all arranged in the shell (1); 6 outward bulges are uniformly arranged on the outer edge of the static friction plate (17) along the circumferential direction, and 3 inward bulges are uniformly arranged on the inner edge of the dynamic friction plate (18) along the circumferential direction; 6 first grooves in the inner side of the shell (1) correspond to 6 outward bulges on the outer edge of each static friction plate (17) respectively, 3 inward bulges on the inner edge of each dynamic friction plate (18) correspond to 3 second grooves on the outer shaft, the outward bulges of 8 static friction plates (17) are inserted into the first grooves correspondingly, the inward bulges of 7 dynamic friction plates (18) are inserted into the second grooves correspondingly, and one dynamic friction plate (18) is arranged between two adjacent static friction plates (17); the inner diameter of the static friction plate (17) and the inner diameter of the dynamic friction plate (18) are both larger than the outer diameter of the outer shaft;
a cylinder body (6) and a piston (5) are arranged in an inner space of the shell (1) far away from the outer shaft side, the cylinder body (6) and the piston (5) are arranged in parallel along the direction vertical to the axis of the shell (1), and a gap for containing hydraulic oil is reserved between the cylinder body (6) and the piston (5); a section of third groove for accommodating the outer shaft is formed in the side end, close to the static friction plate (17), of the piston (5) along the axis direction of the shell (1), and the inner diameter of the third groove is the same as the outer diameter of the outer shaft; a section of circular spring groove is symmetrically arranged on the side wall of the piston (5) far away from the side end of the static friction plate (17), and six disc springs are arranged in the spring groove back to back or mouth to mouth; 2 second threaded holes are symmetrically formed in the side wall, far away from the side end of the static friction plate (17), of the piston (5) and on the outer side of the spring groove close to the cylinder body (6), and 2 third threaded holes are symmetrically formed in the side wall, far away from the side end of the static friction plate (17), of the piston (5) and on the outer side of the spring groove far away from the cylinder body (6);
along the axial direction of the shell (1), the side wall of the shell (1) is provided with 12 second through holes and 2 third through holes; the front end cover is provided with 12 second through holes, 12 first through holes (23) on the front end cover and 12 connecting bolts (9) which are in one-to-one correspondence, and the front end cover is provided with 2 third through holes, 2 first threaded holes (20) on the front end cover and 2 fastening bolts (14) which are in one-to-one correspondence; 2 manual release bolts (10) are in one-to-one correspondence with 2 second threaded holes, and 2 manual release plugs (12) are in one-to-one correspondence with 2 third threaded holes;
the rear end cover (8) is respectively provided with 18 fourth through holes; the four-way connecting structure comprises 12 fourth through holes, 2 third through holes, 2 fourth through holes, 2 first threaded holes (20), 2 fourth through holes, 2 second threaded holes and 2 third threaded holes, wherein the 12 fourth through holes correspond to the 12 second through holes one to one, the 2 fourth through holes correspond to the 2 second threaded holes one to one, and the 2 through holes correspond to the 2 third threaded holes one to one; a fourth groove is formed in the central part of the inner side of the rear end cover (8) and corresponds to the piston (5);
the 12 connecting bolts (9) respectively penetrate through 12 fourth through holes in the rear end cover (8), 12 second through holes in the shell (1) and 12 first through holes (23) in the front end cover from back to front in sequence; 2 fastening bolts (14) respectively penetrate through 2 fourth through holes in the rear end cover (8) and 2 third through holes in the shell (1) from back to front in sequence and correspondingly penetrate through 2 first threaded holes (20) in the front end cover; 2 manual release bolts (10) respectively penetrate through 2 fourth through holes in the rear end cover (8) from back to front in sequence and correspondingly penetrate through 2 second threaded holes; 2 manual release plug (12) respectively by after 2 fourth through-holes on preceding correspondence pass rear end cover (8) in proper order, correspond 2 third screw holes of penetrating.
3. The front-end capped hydraulic multi-disc brake of claim 2, further comprising: 2 plug bolts (2), a first gasket (3), a second gasket (13), a third gasket (4) and a fourth gasket (7); wherein the content of the first and second substances,
2 observation holes are symmetrically formed in the side wall of the shell (1) corresponding to the positions of the friction plate (17) and the movable friction plate (18) along the direction vertical to the axial direction of the shell (1), and 2 plug plugs (2) are respectively arranged in the 2 observation holes;
a first gasket (3) is arranged between the plug (2) and the corresponding observation hole; a second gasket (13) is arranged between the manual release plug (12) and the corresponding fourth through hole; a third gasket (4) and a fourth gasket (7) are arranged between the cylinder body (6) and the piston (5).
4. The front-end capped hydraulic multi-disc brake of claim 2, further comprising: an oil plug (16) and a copper pad (15); wherein the content of the first and second substances,
1 oil inlet/outlet hole for installing an oil plug (16) is arranged on the side wall of the shell (1) opposite to the cylinder body (6) along the direction vertical to the axial direction of the shell (1); a copper pad (15) is arranged between the oil inlet/outlet hole orifice and the oil plug (16).
5. The hydraulic multi-disc brake with a front end cover according to claim 1, wherein the outer diameter of the front end cover is smaller than or equal to the outer contour diameter of the hydraulic multi-disc brake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974680.8U CN212985853U (en) | 2020-05-24 | 2020-05-24 | Hydraulic multi-disc brake with front end cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974680.8U CN212985853U (en) | 2020-05-24 | 2020-05-24 | Hydraulic multi-disc brake with front end cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212985853U true CN212985853U (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020974680.8U Active CN212985853U (en) | 2020-05-24 | 2020-05-24 | Hydraulic multi-disc brake with front end cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212985853U (en) |
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2020
- 2020-05-24 CN CN202020974680.8U patent/CN212985853U/en active Active
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