High-strength durable brake camshaft

Abstract

The utility model discloses a high-strength durable brake cam shaft which comprises a main shaft (1), one end of the main shaft (1) is connected with an S-shaped cam head (3) through a transition block (2), and an outer spline (4) is arranged on the outer wall of the other end of the main shaft (1). The main shaft (1), the transition block (2) and the cam head (3) are integrally forged and molded through a cast steel rod; the end, close to the transition block (2), of the main shaft (1) is sleeved with a connecting sleeve (5), the end, close to the transition block (2), of the connecting sleeve (5) is connected with a connecting ring (6) vertically extending outwards, and the connecting ring (6) is connected with the transition block (2); and a plurality of reinforcing ribs (7) which are annularly and uniformly distributed at intervals are connected between the outer side surface of the connecting sleeve (5) and the connecting ring (6). The utility model not only can improve the strength, but also has the advantage of better durability.

Description

Technical Field

[0001] The utility model relates to the field of brake camshafts, in particular to a high-strength and durable brake camshaft. Background Art

[0002] Most truck brakes use drum brakes. After the brake arm drives the brake camshaft to rotate, the S-shaped cam head at the end of the brake camshaft drives the brake shoe to move, so that friction braking is achieved between the brake shoe and the brake drum.

[0003] The existing brake camshaft is similar to the hollow brake camshaft for automobile disclosed in ZL202221080322.8, which is provided with an S-shaped cam head at one end and an external spline on the outer side surface of the other end. Although a transition block is provided between the cam head and the hollow shaft body to increase the strength, the connection strength between the transition block and the hollow shaft body is still relatively weak, which is prone to damage during rotation and has poor durability.

[0004] Therefore, the existing brake camshaft has the problems of low strength and poor durability. Utility Model Content

[0005] The purpose of the utility model is to provide a high-strength and durable brake camshaft. The utility model can not only improve the strength, but also has the advantages of good durability.

[0006] The technical solution of the utility model is as follows: a high-strength and durable brake camshaft comprises a main shaft, one end of which is connected to an S-shaped cam head via a transition block, and an external spline is arranged on the outer wall of the other end of the main shaft; the main shaft, the transition block and the cam head are integrally forged by a cast steel rod; a connecting sleeve is outer-connected to one end of the main shaft close to the transition block, and a connecting ring extending vertically outward is connected to one end of the connecting sleeve close to the transition block, and the connecting ring and the transition block are interconnected; a plurality of reinforcing ribs evenly spaced in an annular shape are connected between the outer side surface of the connecting sleeve and the connecting ring.

[0007] In the aforementioned high-strength and durable brake camshaft, the reinforcing ribs are arranged in a triangular shape.

[0008] In the aforementioned high-strength and durable brake camshaft, the reinforcing ribs are arranged at an angle, and the inclination direction of the reinforcing ribs is the same as the rotation direction of the cam head during braking.

[0009] In the aforementioned high-strength and durable brake camshaft, a plurality of No. 1 screws are connected between the connecting sleeve and the main shaft; and a plurality of No. 2 screws distributed in a ring shape are connected between the connecting ring and the transition block.

[0010] In the aforementioned high-strength and durable brake camshaft, all No. 1 screws between the connecting sleeve and the main shaft are evenly divided into three groups, and the No. 1 screws of two adjacent groups are spaced apart, and each group of No. 1 screws are evenly distributed in a ring shape.

[0011] In the aforementioned high-strength and durable brake camshaft, all No. 2 screws between the connecting ring and the transition block are arranged in two groups of concentric circles that are spaced apart.

[0012] Compared with the prior art, the utility model has higher overall strength by forging the main shaft, transition block and cam head into one piece through cast steel bars; the transition block and the main shaft are connected by an integrated connecting sleeve and a connecting ring, and a plurality of reinforcing ribs evenly distributed in an annular shape are connected between the connecting sleeve and the connecting ring, thereby improving the strength of the part with the largest shaft diameter change, and can better avoid the problem of easy damage to this part when the main shaft rotates, thereby improving durability.

[0013] In addition, the reinforcing ribs in the utility model are arranged in a triangular shape, using less material and having strong stability; the reinforcing ribs are arranged to be inclined toward the rotation direction of the cam head, further improving the strength of the area between the main shaft and the transition block when the main shaft rotates.

[0014] The connecting sleeve and the main shaft are connected by multiple turns of evenly spaced No. 1 screws, which provide high connection strength and stability; the connecting ring and the transition block are connected by multiple turns of concentric No. 2 screws, which provide high connection strength and stability. Both the No. 1 and No. 2 screws are removable, and the connecting sleeve and the connecting ring can be replaced and maintained, further improving durability.

[0015] Therefore, the utility model can not only improve the strength, but also has the advantage of good durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the utility model from another viewing angle.

[0018] The markings in the attached drawings are: 1-main shaft, 2-transition block, 3-cam head, 4-external spline, 5-connecting sleeve, 6-connecting ring, 7-reinforcement rib, 8-No. 1 screw, 9-No. 2 screw. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0020] Embodiment. A high-strength and durable brake camshaft, comprising: Figure 1 and 2As shown, it includes a main shaft 1, one end of which is connected to an S-shaped cam head 3 through a transition block 2, and an external spline 4 is arranged on the outer wall of the other end of the main shaft 1; the main shaft 1, the transition block 2 and the cam head 3 are integrally forged by a cast steel rod; a connecting sleeve 5 is connected to the outer sleeve of the end of the main shaft 1 close to the transition block 2, and a connecting ring 6 extending vertically outward is connected to the end of the connecting sleeve 5 close to the transition block 2, and the connecting ring 6 is connected to the transition block 2; a plurality of reinforcing ribs 7 evenly distributed in an annular shape are connected between the outer side surface of the connecting sleeve 5 and the connecting ring 6.

[0021] The reinforcing rib 7 is arranged in a triangular shape; the reinforcing rib 7 is arranged at an inclination, and the inclination direction of the reinforcing rib 7 is the same as the rotation direction of the cam head 3 during braking; a plurality of No. 1 screws 8 are connected between the connecting sleeve 5 and the main shaft 1; a plurality of No. 2 screws 9 distributed in a ring shape are connected between the connecting ring 6 and the transition block 2; all the No. 1 screws 8 between the connecting sleeve 5 and the main shaft 1 are evenly divided into three groups, and the two adjacent groups of No. 1 screws 8 are distributed at intervals, and each group of No. 1 screws 8 are evenly distributed in a ring shape; all the No. 2 screws 9 between the connecting ring 6 and the transition block 2 are arranged in two groups of concentric circles with intervals.

[0022] Working principle: insert the connecting sleeve 5 onto the main shaft 1, and make the connecting ring 6 close to the transition block 2; then, fix the connecting sleeve 5 to the main shaft 1 by multiple No. 1 screws 8, and fix the connecting ring 6 to the transition block 2 by multiple No. 2 screws 9.

[0023] When in use, the brake arm drives the main shaft 1 to rotate through the external spline 4, so that the S-shaped cam head 3 rotates and drives the shoe to generate friction with the brake drum, thereby achieving braking. Since the transition block 2 and the main shaft 1 are connected by an integrated connecting sleeve 5 and a connecting ring 6, and multiple triangular reinforcing ribs 7 arranged in a ring shape are arranged between the outer side of the connecting sleeve 5 and the connecting ring 6, and the direction of the reinforcing ribs 7 is the same as the rotation direction of the cam head 3 during the braking process, the reinforcing ribs 7 can provide better support during the braking process, thereby improving the strength; at the same time, the connecting sleeve 5 and the main shaft 1 are connected by multiple turns of evenly spaced No. 1 screws 8, and the connecting ring 6 and the transition block 2 are connected by multiple turns of concentric No. 2 screws 9, and the connection strength and stability are relatively high. Moreover, the No. 1 screw 8 and the No. 2 screw 9 are both detachable, and the user can also replace and maintain the connecting sleeve 5 and the connecting ring 6, further improving the durability.

Claims

1. A high-strength and durable brake camshaft, comprising a main shaft (1), one end of the main shaft (1) is connected to an S-shaped cam head (3) through a transition block (2), and an external spline (4) is arranged on the outer wall of the other end of the main shaft (1); characterized in that: The main shaft (1), the transition block (2) and the cam head (3) are integrally forged by cast steel bars; a connecting sleeve (5) is connected to the outer shell of one end of the main shaft (1) close to the transition block (2); a connecting ring (6) extending vertically outward is connected to the end of the connecting sleeve (5) close to the transition block (2); the connecting ring (6) and the transition block (2) are connected to each other; a plurality of reinforcing ribs (7) evenly spaced in an annular shape are connected between the outer side surface of the connecting sleeve (5) and the connecting ring (6).

2. A high-strength and durable brake camshaft according to claim 1, characterized in that: The reinforcing ribs (7) are arranged in a triangular shape.

3. The high-strength and durable brake camshaft according to claim 1, characterized in that: The reinforcing rib (7) is arranged in an inclined manner, and the inclination direction of the reinforcing rib (7) is the same as the rotation direction of the cam head (3) during braking.

4. The high-strength and durable brake camshaft according to claim 1, characterized in that: A plurality of No. 1 screws (8) are connected between the connecting sleeve (5) and the main shaft (1); and a plurality of No. 2 screws (9) distributed in an annular shape are connected between the connecting ring (6) and the transition block (2).

5. The high-strength and durable brake camshaft according to claim 4, characterized in that: All No. 1 screws (8) between the connecting sleeve (5) and the main shaft (1) are evenly divided into three groups, and two adjacent groups of No. 1 screws (8) are spaced apart from each other. Each group of No. 1 screws (8) is evenly distributed in a ring shape.

6. The high-strength and durable brake camshaft according to claim 4, characterized in that: All the No. 2 screws (9) between the connecting ring (6) and the transition block (2) are arranged in two groups of concentric circles that are spaced apart.

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