Belt mounting mechanism for parallel shaft type electronic power-assisted steering machine

Abstract

The utility model relates to the technical field of automobile steering system assembly, in particular to a belt mounting mechanism for a parallel shaft type electronic power steering machine, which comprises a support mechanism, a sleeve guide mechanism, a belt fixing fork, a guide pin and a spring. A spring and a belt fixing fork are installed in the sleeve guide mechanism, a guide pin is arranged on the side face of a horizontal table of the belt fixing fork, the end of the guide pin is inserted into a guide groove in the surface of the sleeve guide mechanism, and a fork-shaped structure is arranged at the bottom of the horizontal table of the belt fixing fork and exposed out of the bottom of the sleeve guide mechanism. One end of the belt is arranged outside the fork-shaped structure in a sleeving mode, and the bottom edge of the sleeve guide mechanism abuts against the belt. Compared with the prior art, through cooperation of the spring, the belt fixing fork, the guide pin and the sleeve guide mechanism, stability and accuracy of belt installation are guaranteed. The device has the advantages of being simple in structure, reliable in function and convenient to maintain and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile steering system assembly, in particular to a belt installation mechanism for a parallel-axis electronic power steering machine. Background Art

[0002] During the assembly of a vehicle's steering system, the belt is installed between the ball screw assembly and the electronic servo drive using a belt mounting mechanism. During installation, it is important to ensure that the belt does not fall off and is properly installed without any protrusions.

[0003] How to ensure stability during the installation process and ensure that the belt is installed in the correct position during the assembly of the electronic power steering gear is a basic condition for completing the assembly of the electronic power steering gear; high requirements are placed on equipment alignment and belt installation consistency; how to reasonably improve the belt installation mechanism and ensure the stability of the belt installation process is the key to the improved design of the electronic power steering belt installation mechanism.

[0004] Therefore, it is necessary to design a belt installation mechanism for a parallel-axis electronic power steering machine to ensure the stability and accuracy of the belt installation. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a belt installation mechanism for a parallel-axis electronic power steering machine to ensure the stability and accuracy of the belt installation.

[0006] In order to achieve the above-mentioned purpose, the utility model is a belt installation mechanism for a parallel axis electronic power steering machine, comprising a support mechanism, a sleeve guide mechanism, a belt fixing fork, a guide pin, and a spring. The sleeve guide mechanism is vertically fixed to the bottom of the support mechanism, and a spring and a belt fixing fork are installed inside the sleeve guide mechanism. One end of the spring abuts the inner surface of the sleeve guide mechanism, and the other end of the spring abuts the end face of the horizontal platform of the belt fixing fork. A guide pin is provided on the side of the horizontal platform of the belt fixing fork, and the end of the guide pin is inserted into the guide groove on the surface of the sleeve guide mechanism. A fork structure is provided at the bottom of the horizontal platform of the belt fixing fork, and the fork structure is exposed at the bottom of the sleeve guide mechanism. One end of the belt is sleeved outside the fork structure, and the bottom edge of the sleeve guide mechanism abuts the belt.

[0007] The sleeve guide mechanism and the support mechanism are fixed by a back plate and bolts. The support mechanism is provided with a through hole running through the upper and lower parts. The back plate is located at the upper end of the through hole, and the bottom edge of the back plate is against the upper surface of the support mechanism. The sleeve guide mechanism is located at the lower end of the through hole, and the top edge of the sleeve guide mechanism is against the lower surface of the support mechanism. After the countersunk bolt passes through the back plate, it is fixed to the sleeve guide mechanism. The support mechanism and the downward pressure mechanism of the equipment are fixed by a countersunk bolt.

[0008] The bolt fixing holes of the back plate are countersunk bolt holes, and the bolt fixing holes of the support mechanism are round head hexagonal countersunk holes.

[0009] A clearance fit is adopted between the sleeve guide mechanism and the belt fixing fork, and between the guide groove of the sleeve guide mechanism and the guide pin.

[0010] The belt fixing fork and the guide pin are fixed with a stop bolt.

[0011] The sleeve guide mechanism is provided with a limiting step, which abuts against the lower surface of the horizontal platform of the belt fixing fork.

[0012] The fork-shaped structure is in a semicircular arc shape.

[0013] Compared with the prior art, the present invention ensures the stability and accuracy of belt installation through the cooperation of the spring, the belt fixing fork, the guide pin and the sleeve guide mechanism. The present invention has the advantages of simple structure, reliable function and easy maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the main view of the utility model.

[0015] Figure 2 It is a cross-sectional view of the present utility model.

[0016] Figure 3 This is a diagram of the usage state of the utility model. DETAILED DESCRIPTION

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] See also Figure 1 、 Figure 2 The utility model is a belt installation mechanism for a parallel axis electronic power steering machine, comprising a support mechanism, a sleeve guide mechanism, a belt fixing fork, a guide pin, and a spring. The sleeve guide mechanism 3 is vertically fixed to the bottom of the support mechanism 1, and a spring 5 and a belt fixing fork 6 are installed inside the sleeve guide mechanism 3. One end of the spring 5 abuts against the inner surface of the sleeve guide mechanism 3, and the other end of the spring 5 abuts against the end surface of the horizontal platform 61 of the belt fixing fork 6. A guide pin 4 is provided on the side of the horizontal platform 61 of the belt fixing fork 6, and the end of the guide pin 4 is inserted into the guide groove on the surface of the sleeve guide mechanism 3. A fork structure 62 is provided at the bottom of the horizontal platform 61 of the belt fixing fork 6, and the fork structure 62 is exposed at the bottom of the sleeve guide mechanism 3. One end of the belt 7 is sleeved outside the fork structure 62, and the bottom edge of the sleeve guide mechanism 3 abuts against the belt 7.

[0019] The vertical fixation of the sleeve guide mechanism 3 and the coordination of the guide groove and the guide pin 4 ensure the stability and accuracy of the belt installation.

[0020] In order to further ensure the verticality of the installation of the sleeve guide mechanism 3, the sleeve guide mechanism 3 and the support mechanism 1 are fixed with a back plate 2 and bolts. The support mechanism 1 is provided with a through hole running through the upper and lower parts. The back plate 2 is located at the upper end of the through hole, and the bottom edge of the back plate 2 is against the upper surface of the support mechanism 1. The sleeve guide mechanism 3 is located at the lower end of the through hole, and the top edge of the sleeve guide mechanism 3 is against the lower surface of the support mechanism 1. After the countersunk bolt 1 passes through the back plate 2, it is fixed to the sleeve guide mechanism 3. The support mechanism 1 and the downward pressure mechanism of the equipment are fixed with a countersunk bolt 2.

[0021] Furthermore, the bolt fixing holes of the back plate 2 are countersunk bolt holes, and the bolt fixing holes of the support mechanism 1 are round head hexagonal countersunk holes.

[0022] A clearance fit is adopted between the sleeve guide mechanism 3 and the belt fixing fork 6, and between the guide groove of the sleeve guide mechanism 3 and the guide pin 4, so that the belt fixing fork 6 can move inside the sleeve guide mechanism 3, and the guide pin 4 can move in the guide groove.

[0023] The belt fixing fork 6 and the guide pin 4 are fixed with a stop bolt.

[0024] The sleeve guide mechanism 3 is provided with a limiting step, which abuts against the lower surface of the horizontal platform 61 of the belt fixing fork 6 to limit the extreme position of the horizontal platform 61 in the sleeve guide mechanism 3 and prevent the horizontal platform 61 from sliding out of the sleeve guide mechanism 3.

[0025] The fork-shaped structure 62 is in a semicircular arc shape, so that the belt 7 can be better installed on the belt fixing fork 6.

[0026] See also Figure 3 During operation, the present invention drives the support mechanism 1 and sleeve guide mechanism 3 to perform a downward movement as a whole. The belt 7 is mounted on the fork-shaped structure 62 of the belt fixing fork 6. During the downward movement, when the belt fixing fork 6 presses against the motor gear surface, the belt fixing fork 6 drives the spring 5 to gradually retract. The edge of the sleeve guide mechanism 3 contacts the belt 7 and gradually pushes the belt 7 along the belt fixing fork 6 to the motor gear installation position. After installation is completed, the equipment drives the support mechanism 1 and sleeve guide mechanism 3 to perform an upward movement as a whole. When the belt fixing fork 6 separates from the motor gear surface, the spring 5 recovers, driving the belt fixing fork 6 back to its initial position.

[0027] The utility model ensures the stability and accuracy of belt installation through the cooperation of the spring, the belt fixing fork, the guide pin and the sleeve guide mechanism. The utility model has the advantages of simple structure, reliable function and easy maintenance and replacement.

Claims

1. A belt mounting mechanism for a parallel-axis electronic power steering system, comprising a support mechanism, a sleeve guide mechanism, a belt fixing fork, a guide pin, and a spring, characterized in that: The sleeve guide mechanism (3) is vertically fixed to the bottom of the support mechanism (1). A spring (5) and a belt fixing fork (6) are installed inside the sleeve guide mechanism (3). One end of the spring (5) abuts against the inner surface of the sleeve guide mechanism (3), and the other end of the spring (5) abuts against the end surface of the horizontal platform (61) of the belt fixing fork (6). A guide pin (4) is provided on the side of the horizontal platform (61) of the belt fixing fork (6). The end of the guide pin (4) is inserted into the guide groove on the surface of the sleeve guide mechanism (3). A fork-shaped structure (62) is provided at the bottom of the horizontal platform (61) of the belt fixing fork (6). The fork-shaped structure (62) is exposed at the bottom of the sleeve guide mechanism (3). One end of the belt (7) is sleeved outside the fork-shaped structure (62). The bottom edge of the sleeve guide mechanism (3) abuts against the belt (7).

2. The belt installation mechanism for a parallel-axis electronic power steering according to claim 1, characterized in that: The sleeve guide mechanism (3) and the support mechanism (1) are fixed by a back plate (2) and bolts. The support mechanism (1) is provided with a through hole extending upward and downward. The back plate (2) is located at the upper end of the through hole, and the bottom edge of the back plate (2) abuts against the upper surface of the support mechanism (1). The sleeve guide mechanism (3) is located at the lower end of the through hole, and the top edge of the sleeve guide mechanism (3) abuts against the lower surface of the support mechanism (1). After the countersunk bolt 1 passes through the back plate (2), it is fixed to the sleeve guide mechanism (3). The support mechanism (1) and the downward pressing mechanism of the equipment are fixed by a countersunk bolt 2.

3. The belt installation mechanism for a parallel-axis electronic power steering according to claim 2, characterized in that: The bolt fixing holes of the back plate (2) are countersunk bolt holes, and the bolt fixing holes of the support mechanism (1) are round-head hexagonal countersunk holes.

4. The belt installation mechanism for a parallel-axis electronic power steering according to claim 1, characterized in that: A clearance fit is adopted between the sleeve guide mechanism (3) and the belt fixing fork (6), and between the guide groove of the sleeve guide mechanism (3) and the guide pin (4).

5. The belt installation mechanism for a parallel-axis electronic power steering according to claim 1, characterized in that: The belt fixing fork (6) and the guide pin (4) are fixed with a stop bolt.

6. The belt installation mechanism for a parallel-axis electronic power steering according to claim 1, characterized in that: The sleeve guide mechanism (3) is provided with a limiting step, which abuts against the lower surface of the horizontal platform (61) of the belt fixing fork (6).

7. The belt installation mechanism for a parallel-axis electronic power steering according to claim 1, characterized in that: The fork-shaped structure (62) is in the shape of a semicircular arc.

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