A direction machine tightening tool

Abstract

This invention discloses a steering gear tightening fixture, comprising: a base, a limiting member, a first fixing mechanism, and a driving mechanism. The limiting member is fixed to the base by a vertically arranged side plate, and the limiting member has a receiving cavity for accommodating a nut. The first fixing mechanism is used to clamp and fix the pull rod. The driving mechanism drives the first fixing mechanism to rotate the first fixing mechanism and the pull rod clamped and fixed by the first fixing mechanism. The steering gear tightening fixture proposed in this invention drives the pull rod to rotate through the driving mechanism and the first fixing mechanism. Since the lead screw part on the pull rod can be screwed to the nut, and the nut cannot rotate, the pull rod will rotate upward relative to the nut when it rotates, thereby realizing the screwing process between the pull rod and the nut.

Description

Technical Field

[0001] This invention relates to the field of steering gear technology, and more particularly to a steering gear tightening fixture. Background Technology

[0002] The existing power steering system includes a tie rod 1 and a nut 2. The tie rod 1 has a lead screw section 11 and a rack section 12 of equal length along its length. The nut 2 is screwed to the lead screw section 11. When the steering wheel is turned manually, the steering wheel drives the tie rod 1 to move along its length through the meshing between the gear on the drive shaft and the rack section 12 on the tie rod 1. The end of the tie rod 1 drives the tire to turn through a universal joint and a crossbar. In order to make the existing power steering system more effortless to turn, the power steering system in the existing power steering system drives the nut 2 to rotate. When the nut 2 rotates, it drives the tie rod 1 to move horizontally through the lead screw section 11 on the tie rod 1 that is screwed to it, thereby making the steering more effortless.

[0003] When assembling the steering gear, the nut 2 needs to be fully screwed onto the lead screw 11 on the tie rod 1. After that, the operator needs to manually apply semi-solid lubricant to the lead screw 11 and the rack 12 to reduce the friction between the parts of the steering gear during use and improve the service life of the steering gear. However, the process of manually assembling the tie rod 1, nut 2, and applying lubricant is cumbersome and reduces the assembly efficiency of the steering gear. Summary of the Invention

[0004] To address the technical problems existing in the background art, the present invention proposes a steering gear tightening fixture.

[0005] The present invention proposes a steering gear tightening fixture, including a base;

[0006] The limiting component is fixed to the base by a vertically arranged side plate, and the limiting component has a receiving cavity for accommodating the nut;

[0007] The first fixing mechanism is used to clamp and fix the pull rod;

[0008] The drive mechanism drives the first fixing mechanism to rotate the first fixing mechanism and the pull rod clamped and fixed by the first fixing mechanism.

[0009] Preferably, the first fixing mechanism includes a base, two first cylinders, and two first clamping members. The base has a groove for vertical insertion of the bottom end of the pull rod. The two first cylinders are horizontally fixed on the base. The two first cylinders drive and connect to the two first clamping members respectively, and can drive the two first clamping members to move closer to each other to clamp and fix the pull rod located in the groove.

[0010] Preferably, the driving mechanism includes a plate and a rotating motor. The plate and the side plate are slidably connected vertically, and the rotating motor is fixed on the plate and drives the connecting seat.

[0011] Preferably, a first oil outlet is fixed on the side plate and communicates with the first oil supply system. The oil outlet of the first oil outlet faces the lead screw portion of the pull rod after it has been clamped and fixed by the first fixing mechanism.

[0012] Preferably, the first oil supply system includes a first guide sleeve, a first piston, and a first guide rod. The top end of the first guide sleeve is fixedly connected to a limiting member. The first piston seals and slides on the first chamber of the first guide sleeve and divides the first chamber into a first upper chamber and a first lower chamber. The first oil outlet communicates with the first upper chamber. The first piston is fixedly connected to the first guide rod. The bottom end of the first guide rod extends out of the first guide sleeve and is fixedly connected to the plate.

[0013] Preferably, it also includes a second oil outlet that is connected to the second oil supply system, with the oil outlet of the second oil outlet facing the rack portion on the pull rod.

[0014] Preferably, the second oil supply system includes an annular component, a second guide sleeve, a second piston, and a second guide rod. The annular component is coaxially rotatably mounted on the bottom wall of the limiting component. The top end of the second guide sleeve is fixed to the annular component. The second piston slides and seals within the second chamber on the second guide sleeve, dividing the second chamber into a second upper chamber and a second lower chamber. The second oil outlet is fixed to the second guide sleeve and communicates with the second upper chamber. The second piston is fixedly connected to the second guide rod, and the bottom end of the second guide rod extends out of the second guide sleeve and is fixedly connected to the seat.

[0015] The present invention proposes a steering gear tightening fixture, which also includes an oil reservoir. The oil reservoir is connected to a first upper chamber and a second upper chamber through a conduit. A first check valve is installed in the conduit, and a second check valve is installed on both the first oil outlet and the second oil outlet.

[0016] Preferably, the limiting member has a second fixing mechanism for fixing the nut.

[0017] Preferably, the second fixing mechanism includes two second cylinders and two second clamping members. The two second cylinders are fixed on the limiting member and drive the two second clamping members respectively. The two second clamping members can move closer to each other under the drive of the second cylinders to clamp and fix the nut located in the receiving cavity.

[0018] The steering gear tightening fixture proposed in this invention drives the pull rod to rotate through the set drive mechanism and the first fixing mechanism. Since the lead screw part on the pull rod can be screwed to the nut and the nut cannot rotate, the pull rod will be screwed upward relative to the nut when it rotates, thereby realizing the screwing process between the pull rod and the nut.

[0019] The steering gear tightening fixture proposed in this invention, when tightening the tie rod, the lead screw portion on the tie rod is upward and rotates relative to the first oil outlet. The lubricating oil squeezed out by the first oil outlet can be applied to the outer wall of the lead screw portion. Meanwhile, the rack portion on the tie rod will move upward relative to the second oil outlet, so that the lubricating oil squeezed out by the second oil outlet can be applied to the outer wall of the rack portion. During the tightening process, the lubricating oil application process on the lead screw portion and the rack portion is realized, thereby improving the assembly efficiency of the steering gear. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a steering gear tightening fixture proposed in this invention;

[0021] Figure 2 This is a front sectional view of a steering gear tightening fixture proposed in this invention;

[0022] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the diagram. Detailed Implementation

[0023] Reference Figure 1-3 The present invention proposes a steering gear tightening fixture, comprising: a base 3, a limiting member 4, a first fixing mechanism 6, and a driving mechanism 7. The limiting member 4 is fixed on the base 3 by a vertically arranged side plate 5. The limiting member 4 has a receiving cavity for accommodating a nut 2. The first fixing mechanism 6 is used to clamp and fix the pull rod 1. The driving mechanism 7 drives the first fixing mechanism 6 to rotate the first fixing mechanism 6 and the pull rod 1 clamped and fixed by the first fixing mechanism 6.

[0024] In use, the nut 2 and the pull rod 1, which are in a screwed state, are placed on this fixture. The first fixing mechanism 6 clamps and fixes the pull rod 1. The cavity is adapted to the shape of the nut 2. For the nut 2 with a non-circular outer wall, it can be limited in the horizontal direction. Then, the drive mechanism 7 drives the first fixing mechanism 6 and the pull rod 1 to rotate, thereby tightening the pull rod 1 and the nut 2.

[0025] In the above embodiment, the first fixing mechanism 6 includes a base 61, two first cylinders 62, and two first clamping members 63. The base 61 has a groove for the bottom end of the pull rod 1 to be inserted vertically. The two first cylinders 62 are horizontally fixed on the base 61. The two first cylinders 62 drive and connect to the two first clamping members 63 respectively, and can drive the two first clamping members 63 to move closer to each other to clamp and fix the pull rod 1 located in the groove.

[0026] The drive mechanism 7 includes a plate 71 and a rotating motor 72. The plate 71 and the side plate 5 are slidably connected vertically. The rotating motor 72 is fixed on the plate 71 and drives the connecting seat 61. To prevent the drive mechanism 7 from rotating, the plate 71 has a protrusion. The side plate 5 has a guide groove arranged vertically and adapted to be inserted into the protrusion.

[0027] It should be further explained that, in the existing steering gear assembly, in addition to screwing the nut 2 onto the tie rod 1, lubricating oil needs to be applied to the lead screw portion 11 on the tie rod 1 to reduce the friction during use. In the existing technology, the screwing of the nut 2 and the application of lubricating oil are performed in multiple steps, resulting in a large number of assembly procedures and low efficiency. In order to improve the assembly efficiency of the steering gear, the present invention has a first oil outlet 81 fixed on the side plate 5, which is connected to the first oil supply system 8. The oil outlet of the first oil outlet 81 faces the lead screw portion 11 of the tie rod 1 after it is clamped and fixed by the first fixing mechanism 6. When the drive mechanism 7 drives the pull rod 1 to rotate through the first fixing mechanism 6, since the nut 2 is screwed to the lead screw part 11 on the pull rod 1 and the nut 2 is restricted by the limiting member 4 and will not move downward, the pull rod 1 will rotate while driving the drive mechanism 7 to move upward. During this process, the pull rod 1 moves upward relative to the first oil outlet 81, and the lubricating oil is squeezed onto the lead screw part 11 on the pull rod 1 through the first oil outlet 81. Since the pull rod 1 is in a rotating state, the lubricating oil squeezed out by the first oil outlet 81 can be applied to the lead screw part 11 in a spiral shape, thereby realizing the process of applying lubricating oil to the lead screw part 11.

[0028] In the above embodiment, the first oil supply system 8 includes a first guide sleeve, a first piston, and a first guide rod. The top end of the first guide sleeve is fixedly connected to the limiting member 4. The first piston seals and slides on the first chamber of the first guide sleeve and divides the first chamber into a first upper chamber and a first lower chamber. The first oil outlet 81 communicates with the first upper chamber. The first piston is fixedly connected to the first guide rod. The bottom end of the first guide rod extends out of the first guide sleeve and is fixedly connected to the plate 71.

[0029] When the lever 1 moves upward, it will drive the first fixing mechanism 6 and the driving mechanism 7 to move upward together. When the driving mechanism 7 moves upward, the plate 71 drives the first piston to move upward through the first guide rod. The first piston squeezes the lubricating oil in the first upper chamber, so that the lubricating oil in the first upper chamber can be squeezed out through the first oil outlet 81. Thus, the lubricating oil application process can be carried out synchronously with the twisting process. Moreover, the application of lubricating oil does not require an external power source, making it simpler and faster.

[0030] To further improve the effect of the lubricating oil application process, the tightening fixture proposed in this invention also includes a second oil outlet 91 connected to the second oil supply system 9. The oil outlet of the second oil outlet 91 faces the rack portion 12 on the pull rod 1. The second oil supply system 9 includes an annular component, a second guide sleeve, a second piston, and a second guide rod. The annular component is coaxially rotatably mounted on the bottom wall of the limiting component 4. The top end of the second guide sleeve is fixed to the annular component. The second oil outlet 91 is fixed to the second guide sleeve and communicates with the second upper chamber. The second piston slides and seals within the second chamber on the second guide sleeve and divides the second chamber into a second upper chamber and a second lower chamber. The second piston is fixedly connected to the second guide rod, and the bottom end of the second guide rod extends out of the second guide sleeve and is fixedly connected to the seat 61.

[0031] When the pull rod 1 is installed on the first fixing mechanism 6, the rack portion 12 on the pull rod 1 is arranged opposite to the second oil outlet 91. When the rotating motor 72 in the drive mechanism 7 drives the seat 61 to rotate, the seat 61 drives the second guide rod to rotate, and the second guide rod drives the second guide sleeve to rotate together with the second oil outlet 91, so that the second oil outlet 91 always faces the rack portion 12 and the height of the second oil outlet 91 remains unchanged. When the pull rod 1 moves upward, the rack portion 12 moves upward relative to the second oil outlet 91, so that the second oil outlet 91 can apply lubricating oil to the rack portion 12 when the pull rod 1 is moving upward and rotating.

[0032] At the same time, when the first fixing mechanism 6 moves upward, it drives the second piston to move upward through the second guide rod, and squeezes out the lubricating oil in the second upper chamber through the second oil outlet 91.

[0033] To achieve automatic replenishment of lubricating oil in the first upper chamber and the second upper chamber, the tightening fixture proposed in this invention also includes an oil storage tank. The oil storage tank is connected to the first upper chamber and the second upper chamber through a conduit. A first one-way valve is installed in the conduit, and a second one-way valve is installed on both the first oil outlet 81 and the second oil outlet 91.

[0034] To make the nut 2 more secure during the tightening process, the limiting member 4 has a second fixing mechanism for fixing the nut 2.

[0035] It should be further explained that the second fixing mechanism includes two second cylinders and two second clamping members. The two second cylinders are fixed on the limiting member 4 and drive the two second clamping members respectively. The two second clamping members can approach each other under the drive of the second cylinders to clamp and fix the nut 2 located in the receiving cavity.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A steering gear tightening fixture, the steering gear comprising a pull rod (1) and a nut (2), the pull rod (1) having a lead screw portion (11) and a rack portion (12) of equal length along its length direction, the nut (2) being helically connected to the lead screw portion (11), characterized in that, include: Base (3); The limiting member (4) is fixed to the base (3) by a vertically arranged side plate (5), and the limiting member (4) has a receiving cavity for accommodating the nut (2); The first fixing mechanism (6) is used to clamp and fix the pull rod (1); The drive mechanism (7) drives the first fixing mechanism (6) to rotate the first fixing mechanism (6) and the pull rod (1) clamped and fixed by the first fixing mechanism (6); The first fixing mechanism (6) includes a base (61), two first cylinders (62), and two first clamping members (63). The base (61) has a groove for the bottom end of the pull rod (1) to be inserted vertically. The two first cylinders (62) are horizontally fixed on the base (61). The two first cylinders (62) drive and connect the two first clamping members (63) respectively and can drive the two first clamping members (63) to move closer to each other to clamp and fix the pull rod (1) located in the groove. The drive mechanism (7) includes a plate (71) and a rotating motor (72). The plate (71) and the side plate (5) are slidably connected in the vertical direction. The rotating motor (72) is fixed on the plate (71) and drives the connecting seat (61). A first oil outlet (81) connected to the first oil supply system (8) is fixed on the side plate (5). The oil outlet of the first oil outlet (81) faces the screw part (11) of the pull rod (1) after being clamped and fixed by the first fixing mechanism (6). The first oil supply system (8) includes a first guide sleeve, a first piston, and a first guide rod. The top end of the first guide sleeve is fixedly connected to the limiting member (4). The first piston seals and slides on the first chamber of the first guide sleeve and divides the first chamber into a first upper chamber and a first lower chamber. The first oil outlet (81) communicates with the first upper chamber. The first piston is fixedly connected to the first guide rod. The bottom end of the first guide rod extends out of the first guide sleeve and is fixedly connected to the plate (71).

2. The orientation machine tightening tool of claim 1, wherein, It also includes a second oil outlet (91) connected to the second oil supply system (9), with the oil outlet of the second oil outlet (91) facing the rack portion (12) on the pull rod (1) after being clamped and fixed by the first fixing mechanism (6).

3. The orientation machine tightening tool of claim 2, wherein, The second oil supply system (9) includes an annular component, a second guide sleeve, a second piston, and a second guide rod. The annular component is coaxially and rotatably mounted on the bottom wall of the limiting component (4). The top end of the second guide sleeve is fixed on the annular component. The second piston is sealed and slides in the second chamber on the second guide sleeve and divides the second chamber into a second upper chamber and a second lower chamber. The second oil outlet (91) is fixed on the second guide sleeve and communicates with the second upper chamber. The second piston is fixedly connected to the second guide rod. The bottom end of the second guide rod extends out of the second guide sleeve and is fixedly connected to the seat (61).

4. The orientation machine tightening tool of claim 3, wherein, It also includes an oil storage tank, which is connected to the first upper chamber and the second upper chamber via a conduit. A first check valve is installed in the conduit, and a second check valve is installed on both the first oil outlet (81) and the second oil outlet (91).

5. The orientation machine tightening fixture of claim 1, wherein, The limiting member (4) has a second fixing mechanism for fixing the nut (2).

6. The orientation machine tightening fixture of claim 1, wherein, The second fixing mechanism includes two second cylinders and two second clamping members. The two second cylinders are fixed on the limiting member (4) and drive the two second clamping members respectively. The two second clamping members can approach each other under the drive of the second cylinders to clamp and fix the nut (2) located in the receiving cavity.

Images