CN211574103U

CN211574103U - Pressure arm

Info

Publication number: CN211574103U
Application number: CN201921544263.3U
Authority: CN
Inventors: 朱启运; 张宝东
Original assignee: Ruian Fangli Auto Parts Co ltd
Current assignee: Ruian Fangli Auto Parts Co ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-09-25
Anticipated expiration: 2029-09-17

Abstract

The utility model relates to a pressure arm, including force bearing portion/ball socket and rotating part, be equipped with first cambered surface and second cambered surface on the rotating part, first cambered surface is that the concave surface is located the one side of rotating part, the second cambered surface is that the convex surface is located the another side of rotating part, and be equipped with the strengthening rib on this side, force bearing portion and rotating part junction are the connecting surface, the connecting surface is the cambered surface, the connecting surface has the contact with the face of strengthening rib, force bearing portion increases from ball socket to connecting surface thickness gradually, first cambered surface includes two sections, and these two sections are located the both sides of connecting the surface respectively, the second cambered surface includes both ends, and these two sections are located the both sides of strengthening rib respectively; a replaceable wear-resistant block is arranged in the ball socket. The pressure arm is reasonable and simple in structural design, and the pressure ratio is prolonged by arranging the replaceable wear-resistant block in the ball socket.

Description

Pressure arm

Technical Field

The utility model belongs to the technical field of the spare part technique of atmospheric pressure disk brake for the car and specifically relates to a pressure arm.

Background

In the air disc brake, the rotating shaft assembly completes the braking function of the brake, and the pressure arm is a key part of the rotating shaft assembly and acts as a force-increasing lever. The working principle is as follows: when the brake chamber push rod vertically acts on the pressure arm ball socket, the pressure arm can rotate around the center of the fulcrum cylinder of the rotating shaft mechanism, and the pressure arm has a section of displacement in the braking direction while rotating. The pressure arm is located in a fixed ratio to the displacement in the direction of the ball and socket, i.e. a lever ratio or a force ratio, which is usually constant. The pressure arm transmits the displacement in the braking direction to the base, then transmits the friction disc to by the base respectively, eliminates the clearance between friction disc and the brake disc, and outer friction disc also laminates with the brake disc to the inner and outer friction disc embracing post brake disc realizes braking effect with this. The air disc brake is one of the overhaul components when the automobile is maintained regularly, the ball socket of the existing pressure arm is in contact with the push rod of the brake air chamber and is frequently stressed, the existing pressure arm is easy to damage due to friction, once the existing pressure arm is worn and damaged, the whole pressure arm needs to be replaced, the cost is high, and resources are wasted.

SUMMERY OF THE UTILITY MODEL

To the not enough in the background art, the utility model provides a pressure arm to overcome above defect.

The utility model provides a technical scheme that its technical problem adopted is:

a pressure arm comprises a force bearing part, a ball socket and a rotating part, wherein the ball socket and the rotating part are positioned at two ends of the force bearing part, a first cambered surface and a second cambered surface are arranged on the rotating part, the first cambered surface is a concave surface and is positioned on one surface of the rotating part, the second cambered surface is a convex surface and is positioned on the other surface of the rotating part, a reinforcing rib is arranged on the surface, the joint of the force bearing part and the rotating part is a connecting surface, the connecting surface is a cambered surface, the connecting surface is in contact with the surface of the reinforcing rib, the thickness of the force bearing part is gradually increased from the ball socket to the connecting surface, the first cambered surface comprises two sections which are respectively positioned at two sides of the connecting surface; and a replaceable wear-resistant block is arranged in the ball socket.

One side of the rotating part far away from the force bearing part is provided with a notch.

The section of the bearing part provided with the ball socket is provided with a spherical bulge which is formed by recessing the ball socket, and the wall thickness of the bottom of the ball socket is the same as that of the bearing part.

The ball socket lateral wall is equipped with the groove that extends to the ball socket port, and wear-resisting piece upper surface is the indent cambered surface, and the lower surface is the evagination cambered surface that accords with ball socket inner wall shape, be equipped with the bar groove perpendicular with the groove on the evagination cambered surface, during the installation, the bar groove communicates with the groove relatively.

The section of the strip-shaped groove is arranged with the bottom facing the concave cambered surface.

Due to the adoption of the technical scheme, the problem that the ball socket of the existing pressure arm is frequently stressed and easily abraded is effectively solved, the pressure arm is reasonable and simple in structural design, and the pressure ratio is prolonged by prolonging the service life of the pressure arm through the arrangement of the replaceable wear-resistant block in the ball socket.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic view of the partial sectioning structure of the present invention.

Fig. 4 is a partially enlarged schematic view of fig. 3.

The force bearing part 1 in the figure; a ball socket 2; a spherical protrusion 21; a rotating section 3; a first arc surface 31; a second arc surface 32; a connection surface 4; a reinforcing rib 5; a wear-resistant block 6; a strip-shaped groove 60; an inwardly concave curved surface 61; an outwardly convex curved surface 62; a notch 7; a groove 8; an auxiliary tool 9.

Detailed Description

Referring to fig. 1 in conjunction with fig. 2, fig. 3, and fig. 4, the present invention: the utility model provides a pressure arm, includes bearing portion 1 and is located ball socket 2 and the rotating part 3 at 1 both ends of bearing portion, be equipped with first cambered surface 31 and second cambered surface 32 on the rotating part 3, first cambered surface 31 is located the one side of rotating part 3 for the concave surface, and second cambered surface 32 is located the another side of rotating part 3 for the convex surface, and is equipped with strengthening rib 5 on this face, and bearing portion 1 is connected face 4 with rotating part 3 junction, connecting face 4 and being the cambered surface, connecting face 4 and strengthening rib 5's face and having the contact, bearing portion 1 increases from ball socket 2 to connecting face 4 thickness gradually, first cambered surface 31 includes two sections, and these two sections are located the both sides of connecting face 4 respectively, second cambered surface 32 includes both ends, and these two sections are located the both sides of strengthening rib 5 respectively.

One side of the rotating part 3, which is far away from the force bearing part 1, is provided with a notch 7. As shown in the attached drawings 1-2, the notch 7 is made of a material, so that the cost is reduced, meanwhile, the effect of the pressure arm is not reduced due to the action of the reinforcing rib 5, the arc-shaped connecting surface 4 ensures that the connection between the force bearing part 1 and the rotating part 3 is firmer, the strength is ensured, and the pressure arm is unchanged, so that the pressure arm is ensured to have high transmission efficiency and less loss in the processes of force bearing and force transmission, and can provide enough braking force for a brake.

The section of the force bearing part 1 provided with the ball socket 2 is provided with a spherical bulge 21, the spherical bulge 21 is formed by inwards recessing the ball socket 2, and the wall thickness of the bottom of the ball socket 2 is the same as that of the force bearing part 1. This structural arrangement ensures the service life of the socket 2.

A replaceable wear-resistant block 6 is arranged in the ball socket 2. The side wall of the ball socket 2 is provided with a groove 8 extending to the port of the ball socket 2, the upper surface of the wear-resistant block 6 is an inner concave arc surface 61, the lower surface of the wear-resistant block is an outer convex arc surface 62 conforming to the shape of the inner wall of the ball socket 2, the outer convex arc surface 62 is provided with a strip-shaped groove 60 perpendicular to the groove 8, and during installation, the strip-shaped groove 60 is communicated with the groove 8 relatively.

The section of the strip-shaped groove 60 is arranged with the bottom facing the concave cambered surface 61. As shown in fig. 4, the hook of the auxiliary tool 9 catches the wear block 6 and gives a force to loosen it.

As shown in figure 3, the surface of the concave cambered surface 61 is smooth, the wear-resistant block 6 is arranged in the ball socket 2 and is relatively fixed through the friction force between the convex cambered surface 62 and the ball socket 2, a distance is reserved between the concave cambered surface 61 and the port of the ball socket 2, and the force applied by the brake air chamber push rod acts on the concave cambered surface 61. If the wear-resistant block 6 is worn by the frequent acting force of the brake air chamber push rod after long-term use, the wear-resistant block 6 can be replaced, specifically, as shown in fig. 4, the auxiliary tool 9 is strip-shaped, the end part of the auxiliary tool 9 is provided with a hook part, the hook part end of the auxiliary tool 9 is inserted into the groove 8, then the hook part is inserted into the strip-shaped groove 60, the auxiliary tool 9 gives an upward force to the wear-resistant block 6, so that the wear-resistant block 6 moves relative to the ball socket 2, and the wear-resistant block 6 is taken out. The problem of wear-resisting piece 6 bulldoze repeatedly because of the brake chamber push rod and lead to being difficult to get rid of is solved.

The utility model discloses the effectual problem that frequently atress easily worn and torn of ball socket that has improved current pressure arm, this pressure arm structural design is reasonable simple, is equipped with removable wear-resisting piece 6 through the ball socket 2 and realizes the pressure ratio life extension.

The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.

Claims

1. The utility model provides a pressure arm, includes strength portion (1) and is located ball socket (2) and rotating part (3) at strength portion (1) both ends, be equipped with first cambered surface (31) and second cambered surface (32) on rotating part (3), its characterized in that: the first cambered surface (31) is a concave surface and is positioned on one surface of the rotating part (3), the second cambered surface (32) is a convex surface and is positioned on the other surface of the rotating part (3), the reinforcing rib (5) is arranged on the surface, the joint of the bearing part (1) and the rotating part (3) is a connecting surface (4), the connecting surface (4) is a cambered surface, the connecting surface (4) is in contact with the surface of the reinforcing rib (5), the thickness of the bearing part (1) is gradually increased from the ball socket (2) to the connecting surface (4), the first cambered surface (31) comprises two sections which are respectively positioned on two sides of the connecting surface (4), the second cambered surface (32) comprises two ends, and the two sections are respectively positioned on two sides of the reinforcing rib (5); a replaceable wear-resistant block (6) is arranged in the ball socket (2).

2. The pressure arm of claim 1, wherein: one side of the rotating part (3) far away from the force bearing part (1) is provided with a notch (7).

3. The pressure arm of claim 1, wherein: the section of the force bearing part (1) provided with the ball socket (2) is provided with a spherical bulge (21), the spherical bulge (21) is formed by inwards recessing the ball socket (2), and the wall thickness of the bottom of the ball socket (2) is the same as that of the force bearing part (1).

4. The pressure arm of claim 1, wherein: ball socket (2) lateral wall is equipped with groove (8) that extend to ball socket (2) port, and wear-resisting piece (6) upper surface is indent cambered surface (61), and the lower surface is evagination cambered surface (62) that coincide with ball socket (2) inner wall shape, be equipped with on evagination cambered surface (62) with groove (8) vertically bar groove (60), during the installation, bar groove (60) communicate with groove (8) relatively.

5. The pressure arm of claim 4, wherein: the section of the strip-shaped groove (60) is arranged with the bottom facing the concave cambered surface (61).