CN115342142B

CN115342142B - Plane folding device

Info

Publication number: CN115342142B
Application number: CN202211256244.7A
Authority: CN
Inventors: 张延岭; 王庭义; 娄亚峰; 高飞; 张旭乾; 王进斌
Original assignee: Guozhi Technology Hebei Co ltd
Current assignee: Guozhi Technology Hebei Co ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-02-24
Anticipated expiration: 2042-10-14
Also published as: CN115342142A

Abstract

The application discloses a plane folding device, which relates to the technical field of brakes and comprises a lining and a pin rod; the bush is sleeved on the pin rod; two slip surfaces are arranged on the circumferential side wall of the pin rod; on the section of the pin rod, the included angle of the two sliding surfaces is an obtuse angle; points of the sliding surface, which are closest to the central axis of the pin rod, are not distributed at the end part of the sliding surface; the circumferential inner wall of the bush is attached to the circumferential outer wall of the pin rod; the plane of the circumferential inner wall of the bushing, which is abutted against the sliding surface, is an attaching surface; two movable cavities are formed in the circumferential inner wall of the bushing; when the pin rod is located at a position where the two sliding surfaces are abutted to the abutting surfaces, the movable cavity can enable the pin rod to slide towards a direction away from the joint of the two abutting surfaces in a state that the sliding surfaces are abutted to the abutting surfaces; the movable cavity enables at least one sliding surface of the pin rod to be abutted with the binding surface; limiting plates are arranged at two ends of the pin rod. The brake has the effect of improving the safety and stability of brake braking.

Description

Plane folding device

Technical Field

The application relates to the technical field of brakes, in particular to a plane folding device.

Background

The brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member. Brakes used in vehicle braking systems are typically mounted near a wheel hub for decelerating or braking the wheel. The quality and braking effect of the brakes in the vehicle therefore directly affect the driving safety and the stopping distance.

Vehicle brakes are commonly referred to as drum brakes and disc brakes. Among them, a drum brake, which generates a braking force by pressing a brake shoe against a brake lining on the inner side of a brake drum by using a brake transmission mechanism, is generally a double-shoe drum brake. The shoe plate of drum brake generally installs on the bottom plate through the shoe plate round pin for the shoe plate can rotate on the bottom plate, installs the drive arrangement that drives two shoe plates and keep away from each other in the other end position of two shoe plates on the bottom plate, and the lateral wall that two shoe plates carried on the back mutually has set firmly the brake block. During braking, the driving device drives the two shoe plates to rotate and move away from each other, so that the brake pads are tightly abutted against the inner wall of the brake drum, and braking is realized through friction force.

In a drum brake, the factors that determine and influence the braking effect are the force with which the brake pad is in contact with the brake drum and the size of the contact area. Theoretically, the two points can effectively increase the friction force during braking, and because the abutting force of the brake pad on the brake drum can be controlled by the force for stepping the brake pedal during braking, the key for improving the braking effect is to increase the contact area of the brake pad and the brake drum during braking.

The effective contact area of the brake pad and the brake drum can be increased by the shape design of the brake pad, but because the shoe plate rotates continuously in the fitting process of the brake pad and the brake drum, the contact surface and the contact position can change accordingly, the dynamic process is realized, and the shape design of the brake pad is difficult. In the published 'CN 110307272a double-shoe superposed plane superposed movement brake', the structure improvement of a plane superposed far away from a shoe pin is utilized, the shoe pin structure enables a shoe plate to rotate to shift outwards in the rotating and opening process so as to increase the contact area between a brake pad and a brake drum after the shoe plate rotates, but the time and the distance of the outward shift are difficult to grasp, and further the problem of poor stability in actual use can be generated, namely the same opening angle is realized, the actual contact area and the actual contact position between the lower brake pad and the brake drum are different, the operation experience of vehicle braking is directly influenced, and the safety of vehicle braking is reduced.

Disclosure of Invention

The invention aims to solve the problem that the position limitation stability of a shoe plate rotating shaft is low when a shoe plate pin utilizing a plane superposition principle is used.

The application provides a plane coincide ware adopts following technical scheme:

a flat surface folding device comprises a bushing and a pin rod;

the bush is sleeved on the pin rod;

the circumferential side wall of the pin rod is provided with two mutually communicated through grooves along the axis direction of the pin rod, and two sliding surfaces are formed on the circumferential side wall of the pin rod;

on the section of the pin rod, the included angle of the two sliding surfaces is an obtuse angle;

the point of the slip surface closest to the central axis of the pin rod is not distributed at the end part of the slip surface;

the circumferential inner wall of the bushing is attached to the circumferential outer wall of the pin rod;

the plane where the circumferential inner wall of the bushing is abutted to the sliding surface is a binding surface;

two movable cavities are formed in the circumferential inner wall of the bushing;

when the pin rod is located at a position where the two sliding surfaces are abutted to the abutting surfaces, the movable cavity can enable the pin rod to slide towards a direction far away from the joint of the two abutting surfaces in a state that the sliding surfaces are abutted to the abutting surfaces;

the movable cavity enables at least one sliding surface of the pin rod to be abutted with the abutting surface;

limiting plates are arranged at two ends of the pin rod.

Through adopting above-mentioned technical scheme, because binding face and the design of laminating constantly of glide face, the effectual stability that has improved the relative and pin rod removal of bush, the removal orbit and the displacement range to the bush are restricted, make the bush only can slide along two glide faces, make the pin rod remove between two activity chambeies, and then improved the stability that the axis of rotation of shoe moved along with the bush, because activity chamber makes glide face constantly and binding face butt, and then reduced the disturbance of bush, the security of braking when having improved the plane coincide ware and using.

Optionally, when the two sliding surfaces are abutted to the corresponding abutting surfaces, the pin rod is collinear with the central axis of the bushing.

Through adopting above-mentioned technical scheme, the effectual efficiency that has improved the pin rod and install the correction of position in the bush, also reduced batch production's assembly error simultaneously, also improved the stability that bush and pin rod slided, and then improved stability and the security that plane coincide ware used.

Optionally, the binding surface is provided with a plurality of overflow grooves.

Through adopting above-mentioned technical scheme, after the fat liquoring between pin rod and bush, unnecessary fluid not only can flow through the overflow launder, can also pile up in the overflow launder, carries out fluid for the pin rod and supplyes to improve bush and pin rod and carry out the stability that relative slided.

Optionally, on the cross section of the bushing, the overflow groove is located at a joint of the two attachment surfaces, and the overflow groove is also located at a joint of the attachment surface and the inner wall of the movable cavity.

Through adopting above-mentioned technical scheme, the position setting of overflow launder is in the edge of binding face, has not only reduced pin rod edge edges and corners contact wear's probability, can also make edge edges and corners part stretch into the overflow launder and contact fluid, and then with fluid diffusion on the pin rod surface, has improved lubricated effect.

Optionally, the included angle formed by the binding surfaces ranges from 155 degrees to 158 degrees.

Through adopting above-mentioned technical scheme, the effectual distance that slides relatively for the round pin pole of lining to the bush of contained angle of binding face further restricts, and then restricts the direction that the bush removed, improves the shoe plate and rotates the area of back brake block and brake drum contact, and then improves braking effect.

Optionally, the inner wall of the movable cavity is two arc surfaces;

the arc surface of the inner wall of the movable cavity can be tightly attached to the circumferential outer wall of the pin rod.

Through adopting above-mentioned technical scheme, when the pin rod removed two binding face terminal, can with the arc surface laminating in activity chamber, and then improved the stability of bush removal back position.

Optionally, the central angle of the arc surface of the movable cavity ranges from 110 ° to 115 °.

Through adopting above-mentioned technical scheme, the contained angle restriction of the restriction cooperation binding face of activity chamber cambered surface central angle together limits the distance that the bush can slide for the pin rod, no matter how big the diameter of pin rod is promptly, the bush is all relevant with the radius of pin rod for the distance that can slide of pin rod under above-mentioned restrictive condition.

Optionally, the binding surface, the inner wall of the movable cavity, the circumferential outer wall of the pin rod and the sliding surface are all subjected to nickel plating treatment.

Through adopting above-mentioned technical scheme, the nickel plating design of pin rod and bush has effectually improved the planar intensity of the mutual butt of pin rod and bush, and then improves the effective life of pin rod and bush used jointly.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sliding surface of the pin rod and the joint surface of the bush are designed in a matched mode, and the limitation of the movable cavity is added, so that the sliding stability of the bush relative to the pin rod is effectively improved, the disturbance between the bush and the pin rod is reduced, and the stability and the braking effect in the braking process after the shoe pins are replaced by the plane folding device for the brake are further improved;

2. the angle design of the binding surface is matched with the limitation of the central angles of the two arc surfaces of the movable cavity, so that the sliding direction of the bushing relative to the pin rod is limited, the sliding distance of the bushing relative to the pin rod is in proportional relation with the radius of the pin rod, the sliding distance of the bushing can be controlled by designing the radius of the pin rod, and the controllability of the moving distance of the shoe plate driven by the bushing is improved;

3. when two glide plane and two binding face butts, the central axis collineations of pin pole and bush, the effectual efficiency that improves pin pole and bush installation location has also reduced produced error when pin pole and bush cooperate, can also be effectual carry out comparatively even sharing to the pressure that comes from the pin pole that the bush received, improved structural strength, and then improved the life of plane coincide ware.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a partial cross-sectional view showing the active chamber;

fig. 3 is a partial cross-sectional view showing a position after the movement of the bush.

In the figure, 1, a pin rod; 11. a slip surface; 2. a bushing; 21. a movable cavity; 22. a binding face; 23. an overflow trough; 3. a limiting plate; 31. a clamping groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a plane folding device.

Referring to fig. 1 and 2, the plane coincide ware includes pin rod 1 and bush 2, two logical grooves that communicate each other are seted up along self axis direction to pin rod 1 circumference lateral wall and form two glide planes 11 on pin rod 1 circumference lateral wall, two glide plane 11 interconnect are connected with the circumference lateral wall that pin rod 1 originally, the contained angle of two glide planes 11 is the obtuse angle, glide plane 11 does not distribute at glide plane 11 tip apart from the nearest point of pin rod 1 center axis distance, bush 2 cover is established on pin rod 1, the axis of bush 2 and the axis parallel arrangement of pin rod 1, the part of bush 2 inner wall and the glide plane 11 butt of pin rod 1 is binding face 22, when two binding faces 22 of bush 2 all laminate with two glide plane 11 butt of pin rod 1, the central axis collineation of bush 2 and the central axis of pin rod 1.

The circumference inner wall of bush 2 is seted up and is made pin rod 1 to keep away from the movable chamber 21 of the central axis direction slip of bush 2 under the state of slip face 11 and binding face 22 butt, and the in-process that pin rod 1 slided in movable chamber 21, at least one slip face 11 and binding face 22 butt. The inner wall of the movable cavity 21 is two arc surfaces, and the joint of the two binding surfaces 22 and the plane where the central axis of the bushing 2 is located are symmetrically arranged. The distance between the circle centers of the two arc surfaces of the movable cavity 21 and the central axis of the bushing 2 is the same, and the circle center angles of the two arc surfaces of the movable cavity 21 are the same. The arc surface of the movable cavity 21 is connected with the binding surface 22. The radius of the arc surface of the movable cavity 21 is the same as that of the pin rod 1, and when the sliding surface 11 and the binding surface 22 of the pin rod 1 are abutted and slid to the joint of the binding surface 22 and the inner wall of the movable cavity 21, the arc surface of the movable cavity 21 is attached to the circumferential outer wall of the pin rod 1.

In the cross section, the lengths of the two sliding surfaces 11 are the same, and the lengths of the two abutting surfaces 22 are the same. The joint of the two binding surfaces 22 and the joint of the binding surface 22 and the arc surface of the movable cavity 21 are both provided with an overflow groove 23 along the axis of the bushing 2. Limiting plates 3 are arranged at two ends of the pin rod 1, and the end faces, opposite to the two limiting plates 3, are abutted to the end face of the bushing 2.

Due to the design of the movable cavity 21, at least one sliding surface 11 of the pin rod 1 is abutted to the abutting surface 22, so that the sliding stability of the bush 2 relative to the pin rod 1 is effectively improved, and the occurrence of the rotation of the bush 2 relative to the pin rod 1 is reduced. When two slip planes 11 of the pin rod 1 are abutted to the abutting surface 22, the pin rod 1 is located at the center of the bushing 2, the matching processing efficiency is improved, and the error of the matching installation of the pin rod 1 and the bushing 2 is reduced. Binding face 22 restricts with the effectual route that slides the chamber to bush 2 for pin rod 1 slides, and then improved the stability that bush 2 drove the rotation center removal of shoe, limiting plate 3 is the same to bush 2 along the removal of self axis direction restrict, when the shoe round pin in the plane coincide ware replacement stopper uses, the distance that the shoe axis of rotation that takes after the shoe rotates at every turn is more stable and accurate, not only improve the stability of stopper braking, can also improve the area of brake block and brake drum butt, and then improve braking effect. The overflow launder 23 can carry out the water conservancy diversion to unnecessary fluid between pin 1 and the bush 2 to including making partial fluid deposit, can effectually dip in fluid when the marginal portion of pin 1 moves in the overflow launder 23 and get, improve lubricated effect.

Referring to fig. 2 and 3, the included angle formed by the two abutting surfaces 22 ranges from 155 ° to 158 °, and the selected angle in this embodiment is 156.5 °. The central angle of the arc surface of the movable chamber 21 ranges from 110 ° to 115 °, and the angle selected in this embodiment is 112.5 °. In cross section, the radius of the pin rod 1 is the same as that of the arc surface of the movable cavity 21, and the radius is 9.8mm in the embodiment. The circumferential outer wall of the pin rod 1, the sliding surface 11, the inner wall of the movable cavity 21 of the bushing 2 and the binding surface 22 are all plated with nickel layers, and the thickness of the nickel layers in the embodiment ranges from 0.01 mm to 0.02mm. In this embodiment, the radius of the circumferential outer wall of the bush 2 is 15mm in cross section.

Referring to fig. 1, the limiting plate 3 at one end of the pin rod 1 is fixedly welded, and the other end of the pin rod is in interference fit. One of the limiting plates 3 is fixedly provided with a clamping groove 31 for fixing the limiting plate.

Through the common restriction of the contained angle of binding face 22 and the central angle of activity chamber 21 arc surface, can effectually keep fixed proportional relation with the distance that bush 2 slided for pin rod 1 and the radius of pin rod 1, when the design, only can restrict the distance of sliding of bush 2 through the pin rod 1 radius of designing the difference, can satisfy the design demand of different use scenarios. The angle and the vertical selection of radius of this embodiment are effectual has improved the stability that bush 2 slided for pin pole 1, and the selection and the numerical value in route can the effectual stability that improves the plane coincide ware and drive shoe plate axis of rotation removal behind the replacement hoof round pin, and then improve the security of braking. The selection of the radius of the circumferential outer wall of the bushing 2 relative to the radius of the pin rod 1 effectively improves the structural strength of the bushing 2, and further improves the service life of the plane folding device.

The implementation principle of the plane folding device in the embodiment of the application is as follows: after replacing the shoe pin through the plane folding device, the lining 2 is driven to move relative to the pin rod 1 in the shoe plate rotating process, the stability of the lining 2 in the sliding process is effectively improved through the abutting relation of the binding face 22 and the sliding face 11, and then the rotating shaft of the shoe plate is driven to move, so that the area of the brake pad and the brake drum abutted to the brake drum after the shoe plate rotates is improved, and the braking effect is improved. The design of activity chamber 21 and the structural design of pin pole 1 have effectually improved the stability of bush 2 position when sliding pin pole 1 and being located activity chamber 21 arc surface position, have reduced the probability of bush 2 dislocation in braking process, and then improve the stability and the security of braking.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape, numerical value and principle of the application are covered in the protection scope of the application.

Claims

1. A flat laminator, comprising: comprises a bush (2) and a pin rod (1);

the bush (2) is sleeved on the pin rod (1);

the circumferential side wall of the pin rod (1) is provided with two mutually communicated through grooves along the axis direction of the pin rod and two sliding surfaces (11) are formed on the circumferential side wall of the pin rod (1);

on the cross section of the pin rod (1), the included angle of the two sliding surfaces (11) is an obtuse angle;

the point of the sliding surface (11) closest to the central axis of the pin rod (1) is not distributed at the end part of the sliding surface (11);

the circumferential inner wall of the bushing (2) is attached to the circumferential outer wall of the pin rod (1);

the plane of the circumferential inner wall of the bushing (2) abutted against the sliding surface (11) is a binding surface (22);

two movable cavities (21) are formed in the circumferential inner wall of the bushing (2);

when the pin rod (1) is located at a position where the two sliding surfaces (11) are abutted against the abutting surfaces (22), the movable cavity (21) can enable the pin rod (1) to slide towards a direction far away from the joint of the two abutting surfaces (22) in a state that the sliding surfaces (11) are abutted against the abutting surfaces (22);

the movable cavity (21) enables at least one sliding surface (11) of the pin rod (1) to abut against the abutting surface (22);

limiting plates (3) are arranged at two ends of the pin rod (1).

2. A flat laminator according to claim 1, wherein: when the two sliding surfaces (11) are abutted to the corresponding abutting surfaces (22), the pin rod (1) and the central axis of the bushing (2) are collinear.

3. A flat laminator according to claim 1, wherein: the binding surface (22) is provided with a plurality of overflow grooves (23).

4. A flat laminator according to claim 3, wherein: on the section of the lining (2), the overflow groove (23) is positioned at the joint of the two binding surfaces (22), and the overflow groove (23) is also positioned at the joint of the binding surfaces (22) and the inner wall of the movable cavity (21).

5. A flat laminator according to claim 2, wherein: the included angle formed by the binding surface (22) ranges from 155 degrees to 158 degrees.

6. A flat laminator according to claim 5, wherein: the inner wall of the movable cavity (21) is two arc surfaces;

the arc surface of the inner wall of the movable cavity (21) can be tightly attached to the circumferential outer wall of the pin rod (1).

7. A flat laminator according to claim 6, wherein: the central angle range of the arc surface of the movable cavity (21) is 110-115 degrees.

8. A flat laminator according to claim 1, wherein: the binding surface (22), the inner wall of the movable cavity (21), the circumferential outer wall of the pin rod (1) and the sliding surface (11) are all subjected to nickel plating treatment.