Connecting device and connecting method for steering arm of mine truck

Abstract

The invention discloses a connecting device for a steering arm of a mine truck. The connecting device comprises a steering knuckle, the steering arm, a conical nut, a double-end stud and a shear pin, and the steering knuckle is provided with a plurality of inner threaded holes and a plurality of inner pin holes; a plurality of positioning through holes and a plurality of taper holes are formed in the front end of the steering arm, and the taper holes are inner taper holes; the end part of the conical nut is provided with a conical end head, the threaded through hole in the middle is provided with an internal thread, and the taper of the inner conical hole is the same as that of the conical end head; the front end of the double-end stud penetrates through the taper hole to be connected to the inner threaded hole, the conical nut is connected to the rear end of the double-end stud, the conical end is located in the inner taper hole, and the shear pin penetrates through the inner pin hole and the positioning through hole. The invention further discloses a connecting method of the mining truck steering arm. The connecting mode of the steering arm and the steering knuckle is changed, the shear pin is arranged, so that the steering arm can bear large alternating load, and the steering arm has the advantages of being reliable in installation and long in service life.

Description

Technical Field

[0001] The invention relates to the technical field of mining dump trucks, and in particular to a connecting device and a connecting method for a mining truck steering arm. Background Art

[0002] Mining dump trucks are widely used as important transportation equipment for open-pit mining. The steering arm is an important component of the steering mechanism of mining trucks, which involves the safety of vehicle operation and the stability of steering. The steering arm is connected to the steering knuckle through bolts and nuts, and the steering of the front wheels of the mining truck is achieved through the telescopic movement of the steering cylinder and the coordinated movement of the tie rod.

[0003] During vehicle operation, the steering arm is subjected to alternating loads, and the connection method between the steering arm and the steering knuckle through bolts and nuts cannot meet the requirements of harsh working conditions. In addition, when suddenly subjected to a large load, the bolts may be sheared off, affecting the driving safety of the vehicle. Summary of the invention

[0004] The purpose of the present invention is to provide a connection device and a connection method for a steering arm of a mining vehicle, which changes the connection mode of the steering arm and the steering knuckle and is provided with a shear pin, so that the steering arm can withstand large alternating loads and has the advantages of reliable steering arm installation and long service life.

[0005] To achieve the above purpose, the technical solution used in the present invention is: The connecting device of the steering arm of a mining vehicle comprises: a steering knuckle, a steering arm, a tapered nut, a stud and a shear pin, wherein the steering knuckle is provided with a plurality of internal threaded holes and a plurality of internal pin holes; a plurality of positioning through holes and a plurality of tapered holes are provided at the front end of the steering arm, and the tapered holes are provided with internal tapered holes; a tapered end is provided at the end of the tapered nut, and an internal thread is provided at the threaded through hole in the middle, and the tapers of the internal tapered hole and the tapered end are the same; the front end of the stud passes through the tapered hole and is connected to the internal threaded hole, the tapered nut is connected to the rear end of the stud, the tapered end is located in the internal tapered hole, and the shear pin is passed through the internal pin hole and the positioning through hole.

[0006] Furthermore, the inner tapered hole and the tapered end have the same taper, and the taper angle is 45-70°.

[0007] Furthermore, the tapered hole is a combination of an inner tapered hole and a straight hole, and the straight hole is located at the upper part of the inner tapered hole.

[0008] Furthermore, the centers of the multiple positioning through holes and the multiple tapered holes are located on the same circle.

[0009] Furthermore, the steering arm is provided with two positioning through holes, and the two positioning through holes are located opposite to each other.

[0010] Furthermore, the shear pin, the inner pin hole and the positioning through hole are interference fit.

[0011] Furthermore, a steering channel is provided at the rear end, and the steering channel is used to connect the steering cylinder.

[0012] The connection method of the steering arm of a mining vehicle includes: Align the internal threaded hole and internal pin hole of the steering knuckle with the tapered hole and positioning through hole of the steering arm respectively; The front end of the stud is passed through the tapered hole and connected to the internal threaded hole, the shear pin is passed through the internal pin hole and the positioning through hole, the tapered nut is connected to the rear end of the stud, the tapered end is located in the internal tapered hole, and the steering arm is fixed to the steering knuckle.

[0013] Preferably, the stud is coated with anti-loosening glue, and the shear pin is installed in the inner pin hole and the positioning through hole after being frozen.

[0014] The technical effects of the present invention include: 1. In the present invention, the conventional method of connecting the steering arm and the steering knuckle with bolts and nuts is changed, the structure of the bolts and nuts is changed, and the steering arm and the steering knuckle are connected with conical nuts and studs, thereby improving the connection strength and having good anti-loosening performance.

[0015] At the same time, the friction of the nut is improved. The cone angle of the inner cone on the steering arm and the outer cone on the conical nut is 45-70 degrees, which can generate greater friction. Compared with ordinary nuts, it has good anti-loosening performance and is safe and reliable.

[0016] 2. In the present invention, a shear pin is provided at the connection position of the steering arm and the steering knuckle, which can withstand a large alternating load and has the advantages of reliable installation and long service life of the steering arm.

[0017] The two symmetrically arranged shear pins can withstand large sudden loads and have the advantages of reliable steering arm installation and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the connecting device of the steering arm of a mining vehicle in the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the steering arm in the present invention; Figure 3 It is a structural schematic diagram of the conical nut in the present invention; Figure 4 The present invention is a cross-sectional structural diagram of the connection position of the steering knuckle and the steering arm in the present invention. DETAILED DESCRIPTION

[0019] The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce the invention.

[0020] like Figure 1 The figure is a schematic diagram of the structure of the connecting device of the steering arm of the mining vehicle in the present invention.

[0021] The connecting device of the steering arm of a mining vehicle comprises: a steering knuckle 1, a steering arm 2, a conical nut 3, a stud 4, and a shear pin 5. The steering arm 2 is connected to the top of the steering knuckle 1 through the conical nut 3, the stud 4, and the shear pin 5.

[0022] like Figure 2 , which is a schematic cross-sectional structure diagram of the steering arm 2 in the present invention.

[0023] A plurality of positioning through holes 21 and a plurality of tapered holes 22 are arranged on the side where the front end of the steering arm 2 is connected to the steering knuckle 1, and a steering through hole 23 is arranged on the rear end. The steering through hole 23 is used to connect the steering cylinder.

[0024] The tapered hole 22 is provided with an inner tapered hole 221 , and the tapered angle of the inner tapered hole 221 is 45-70°.

[0025] The tapered hole 22 may also be configured as a combination of an inner tapered hole 221 and a straight hole 222 , with the straight hole 222 being located at the upper portion of the inner tapered hole 221 .

[0026] In this preferred embodiment, the centers of the plurality of positioning through holes 21 and the plurality of tapered holes 22 are located on the same circle, and the steering arm 2 is provided with two positioning through holes 21 , which are located opposite to each other.

[0027] like Figure 3 , which is a schematic structural diagram of the conical nut 3 in the present invention.

[0028] The end of the conical nut 3 is provided with a conical end head 32, and the threaded through hole 31 in the middle is provided with an internal thread; the internal conical hole 221 and the conical end head 32 have the same taper, and the taper angle is 45-70°.

[0029] like Figure 4 The figure shows a cross-sectional structure diagram of the connection position of the steering knuckle 1 and the steering arm 2 in the present invention.

[0030] The steering knuckle 1 is provided with a plurality of internal threaded holes 11 and a plurality of internal pin holes 12 arranged symmetrically, and the internal pin holes 12 and the positioning through holes 21 are located opposite to each other. The size and specification of the external thread of the stud 4 correspond to the internal threaded holes 11 on the steering knuckle 1 and the threaded through holes 31 of the tapered nut 3.

[0031] The front end of the stud 4 passes through the tapered hole 22 and is connected to the internal threaded hole 11, the tapered nut 3 is connected to the rear end of the stud 4, and the tapered end 32 is located in the internal tapered hole 221; the shear pin 5 is passed through the internal pin hole 12 and the positioning through hole 21, and the shear pin 5 and the internal pin hole 12 and the positioning through hole 21 are interference fits, which achieves reliable fixation during the operation of the vehicle and can withstand large alternating loads.

[0032] The tapered end 32 cooperates with the inner tapered hole 221 to generate a large friction force, and has a good anti-loosening effect. The shear pin 5 can withstand a large sudden load, improve the connection strength between the steering arm 2 and the steering knuckle 1, prevent the stud 4 from breaking, improve the installation reliability of the steering arm 2, and extend the service life of the steering arm 2.

[0033] The connection method of the steering arm of a mining vehicle is as follows: Step 1: Align the internal threaded hole 11 and the internal pin hole 12 of the steering knuckle 1 with the tapered hole 22 and the positioning through hole 21 of the steering arm 2 respectively; Step 2: Pass the front end of the stud 4 through the tapered hole 22 and connect it to the internal threaded hole 11. The shear pin 5 is inserted into the internal pin hole 12 and the positioning through hole 21. The tapered nut 3 is connected to the rear end of the stud 4. The tapered end 32 is located in the internal tapered hole 221 to fix the steering arm 2 to the steering knuckle 1.

[0034] The stud 4 is coated with anti-loosening glue, and the shear pin 5 is installed in the inner pin hole 12 and the positioning through hole 21 after being frozen. The tapered end 32 is located in the inner tapered hole 221, which can generate a large friction force to prevent the tapered end 32 from loosening. At the same time, the strength of the tapered nut 3 will not be reduced at a tapered angle of 45-70°, and the straight hole 222 ensures the strength of the connected part on the steering arm 2.

[0035] The terms used in the present invention are illustrative and exemplary, rather than restrictive. Since the present invention can be implemented in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A connecting device for a steering arm of a mining vehicle, characterized in that: include: Steering knuckle, steering arm, tapered nut, stud, shear pin, the steering knuckle is provided with a plurality of internal thread holes and a plurality of internal pin holes; The front end of the steering arm is provided with a plurality of positioning through holes and a plurality of tapered holes, and the tapered hole is provided with an inner tapered hole; the end of the tapered nut is provided with a tapered end head, and the threaded through hole in the middle is provided with an inner thread, and the tapers of the inner tapered hole and the tapered end head are the same; the front end of the stud passes through the tapered hole and is connected to the inner threaded hole, the tapered nut is connected to the rear end of the stud, the tapered end head is located in the inner tapered hole, and the shear pin is passed through the inner pin hole and the positioning through hole.

2. The connecting device for the steering arm of a mining vehicle according to claim 1, characterized in that: The taper of the inner tapered hole and the tapered end is the same, and the taper angle is 45-70°.

3. The connecting device for the steering arm of a mining vehicle according to claim 1, characterized in that: The tapered hole is a combination of an inner tapered hole and a straight hole, and the straight hole is located at the upper part of the inner tapered hole.

4. The connecting device for the steering arm of a mining vehicle according to claim 1, characterized in that: The centers of the plurality of positioning through holes and the plurality of tapered holes are located on the same circle.

5. The connecting device for the steering arm of a mining vehicle according to claim 1, characterized in that: The steering arm is provided with two positioning through holes, and the two positioning through holes are located opposite to each other.

6. The connecting device for the steering arm of a mining vehicle according to claim 1, characterized in that: The shear pin, the inner pin hole and the positioning through hole are interference fit.

7. The connecting device for the steering arm of a mining vehicle according to claim 1, characterized in that: A steering channel is arranged at the rear end, and the steering channel is used for connecting the steering cylinder.

8. A method for connecting a mining vehicle steering arm using the connecting device according to claim 1, characterized in that: include: Align the internal threaded hole and internal pin hole of the steering knuckle with the tapered hole and positioning through hole of the steering arm respectively; The front end of the stud is passed through the tapered hole and connected to the internal threaded hole, the shear pin is passed through the internal pin hole and the positioning through hole, the tapered nut is connected to the rear end of the stud, the tapered end is located in the internal tapered hole, and the steering arm is fixed to the steering knuckle.

9. The method for connecting a steering arm of a mining vehicle according to claim 8, characterized in that: The studs are coated with anti-loosening glue, and the shear pins are installed in the inner pin holes and positioning through holes after being frozen.

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