A director assembly aid

Abstract

This invention discloses a steering gear assembly auxiliary device, comprising: a base, a cylinder, and a drive mechanism. The cylinder is fixed on the base and has a receiving cavity inside. The receiving cavity has an opening at its top and a support surface on its top wall for supporting a nut. The frame can enter the receiving cavity through the opening. The receiving cavity is filled with lubricating oil. The drive mechanism is used to drive the frame located in the receiving cavity to rotate relative to the nut located on the support surface. In the assembly auxiliary device proposed in this invention, when the nut rotates, the frame is restricted from rotating by the fixing unit and moves upward. During the upward movement, the nut and the frame are screwed together, and excess lubricating oil on the screw part of the frame is scraped off. This allows the screwing process between the frame and the nut on the steering gear and the lubricating oil application process to be carried out simultaneously, improving the assembly efficiency of the steering gear and making the assembly process more automated.

Description

Technical Field

[0001] This invention relates to the field of steering gear manufacturing technology, and in particular to a steering gear assembly auxiliary device. Background Technology

[0002] The existing power steering system has a frame 11 and a nut 12. The frame 11 has spaced screws 111 and racks 112. When the steering wheel is turned, the steering wheel rotates through the gear on the drive shaft. The gear meshes with the rack 112, thereby driving the frame 11 to move along its length. The end of the frame 11 drives the tire to turn through a universal joint and a tie rod. In order to make the steering easier, the power steering system in the existing power steering system drives the nut 12 to rotate. The nut 12 is screwed to the screws 111. Therefore, when the nut 12 rotates, it will drive the frame 11 to move horizontally through the screws 111.

[0003] When assembling the steering gear, nut 12 needs to be fitted onto screw 111 on the frame 11. See below for details. Figure 3 The process continues until the nut 12 abuts against the protrusion on the frame 11. After that, the operator needs to manually apply semi-solid lubricant to the screw 111 and rack 112 on the frame 11 to reduce the friction between the parts of the steering gear during use and improve the service life of the steering gear. The nut 12 has a screw hole that is spirally connected to the screw 111 and has an assembly hole 121 that is eccentrically arranged with it.

[0004] However, the process of manually assembling the frame 11, nut 12, and applying lubricant is quite cumbersome, which reduces the assembly efficiency of the steering gear. Summary of the Invention

[0005] To address the technical problems existing in the background art, the present invention proposes a steering gear assembly auxiliary device.

[0006] The present invention proposes a steering gear assembly auxiliary device, comprising: a base, a cylinder, and a drive mechanism. The cylinder is fixed on the base, and the cylinder has a receiving cavity. The top of the receiving cavity has an opening, and the top wall of the receiving cavity has a support surface for supporting nuts. The frame can enter the receiving cavity through the opening, and the receiving cavity is filled with lubricating oil. The drive mechanism is used to drive the frame located in the receiving cavity to rotate relative to the nut located on the support surface.

[0007] Preferably, the drive mechanism includes a power unit for rotating the nut and a fixing unit for clamping and fixing the frame.

[0008] Preferably, a piston is vertically slidable and sealed inside the receiving cavity to divide the receiving cavity into an upper chamber and a lower chamber. The lower chamber is connected to an oil storage chamber opened on the base, and a one-way valve is installed on the piston. A fixing unit is installed on the piston.

[0009] Preferably, the fixing unit includes a cylinder and a clamping member, and the number of cylinders and clamping members is at least two. The cylinder is horizontally fixed on the piston and drives the connected clamping member to move the two clamping members closer to or further away from each other.

[0010] Preferably, when the cylinder drives the two clamping members to approach each other, it can clamp the rack located on the frame inside the receiving cavity.

[0011] Preferably, the bottom end of the piston has a tapered counterweight with its tip pointing downwards.

[0012] Preferably, the power unit includes a rotating component, a positioning pin, a gear ring, a gear, and a motor. The rotating component is coaxially and rotatably mounted on the outer wall of the cylinder. The positioning pin is fixed on the top wall of the rotating component, and its top end extends into the support surface to be fitted and inserted into the mounting hole on the nut located on the support surface. The gear ring is coaxially fixed on the rotating component. The gear meshes with the gear ring. The motor is fixed on the cylinder and drives the connecting gear.

[0013] Preferably, the inner wall of the receiving cavity has an annular limiting part that can abut against the bottom wall of the protrusion on the frame, and the through hole in the annular limiting part can fit with the annular outer wall on the frame.

[0014] The assembly auxiliary device proposed in this invention involves placing the frame into a lubricating cavity and placing the nut on a support surface. Then, the power unit drives the nut to rotate, and the fixing unit relatively fixes the frame. When the nut rotates, the frame cannot rotate due to the restriction of the fixing unit and moves upward. During the upward movement, the nut and the frame are screwed together, and excess lubricating oil on the screw part of the frame is scraped off. This allows the screwing process between the frame and the nut on the steering gear and the application of lubricating oil to be carried out simultaneously, improving the assembly efficiency of the steering gear and making the assembly process more automated.

[0015] The assembly auxiliary device proposed in this invention, in addition to restricting the frame from rotating, also allows the frame to drive the piston upward through the fixing unit. As the piston moves upward, it adds lubricating oil into the receiving cavity, thereby achieving automatic replenishment of lubricating oil. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural schematic diagram of a steering gear assembly auxiliary device proposed in this invention; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the diagram; Figure 3 This is a schematic diagram of the cross-sectional structure of the frame and nut in the prior art. Detailed Implementation

[0017] Reference Figure 1-2The present invention proposes a steering gear assembly auxiliary device, comprising: a base 2, a cylinder 3, and a drive mechanism. The cylinder 3 is fixed on the base 2. The cylinder 3 has a receiving cavity 31. The top of the receiving cavity 31 has an opening and the top wall of the cylinder 3 has a support surface for supporting the nut 12. The frame 11 can enter the receiving cavity 31 through the opening. The receiving cavity 31 is filled with lubricating oil. The drive mechanism is used to drive the frame 11 located in the receiving cavity 31 to rotate relative to the nut 12 located on the support surface.

[0018] The assembly process is as follows: When assembling the frame 11 and the nut 12, first screw the nut 12 to the head of the screw 111 on the frame 11 so that the two are screwed together. Then, place the frame 11 into the receiving cavity 31 and place the nut 12 on the support surface. When the frame 11 is placed into the receiving cavity 31, it is immersed in lubricating oil. Then, the drive mechanism drives the frame 11 and the nut 12 to rotate relative to each other. When rotating, the frame 11 moves upward relative to the nut 12, thereby realizing the screwing process between the nut 12 and the frame 11. During the screwing, the nut 12 will also scrape off the excess lubricating oil on the screw 111 to avoid the waste of lubricating oil. Thus, the screwing and lubricating processes between the frame 11 and the nut 12 are carried out simultaneously, improving the assembly efficiency of the steering gear.

[0019] In the above embodiments, the driving mechanism may include a power unit 41 for rotating the frame 11 and a fixing unit 42 for clamping and fixing the nut 12. Alternatively, the driving mechanism may also include a power unit 41 for rotating the nut 12 and a fixing unit 42 for clamping and fixing the frame 11. When the frame 11 and nut 12 are fixed, rotating the nut 12 or the frame 11 can cause the frame 11 to move upward within the receiving cavity 31. To facilitate the addition of lubricating oil to the receiving cavity 31, in embodiments where the driving mechanism includes a power unit 41 for rotating the nut 12 and a fixing unit 42 for clamping and fixing the frame 11, a piston 5 is vertically slidable and sealed inside the receiving cavity 31 to divide the receiving cavity 31 into an upper chamber and a lower chamber. The lower chamber is connected to an oil storage chamber opened on the base 2, and a one-way valve is installed on the piston 5. The fixing unit 42 is installed on the piston 5.

[0020] When the fixing unit 42 clamps and fixes the frame 11, the piston 5 is also fixed relative to the frame 11. The piston 5 has a limiting part, and the inner wall of the receiving cavity 31 is provided with a limiting groove that slides vertically into the limiting part to ensure that the piston 5 can only move vertically up and down and will not rotate. When the power unit 41 drives the nut 12 to rotate, since the nut 12 is screwed to the frame 11 and the frame 11 cannot rotate due to the restriction of the fixing unit 42 and the piston 5, when the nut 12 rotates, the frame 11 will drive the piston 5 to move upward together through the fixing unit 42. When the piston 5 moves upward, the lubricating oil in the oil storage chamber on the base 2 will be drawn into the lower chamber through the conduit. When the protrusion on the frame 11 abuts against the nut 12, the screwing work of the frame 11 and the nut 12 is completed. At this time, the top of the frame 11 is outside the device, the fixing unit 42 is separated from the frame 11, and the frame 11 and the nut 12 after screwing can be taken out from the device.

[0021] To reduce the buoyancy of the lubricating oil on the piston 5 and facilitate the entry of the lubricating oil from the lower chamber to the upper chamber, the bottom end of the piston 5 has a tapered counterweight with the tip pointing downwards. When assembling the next set of steering gears, the weight of the frame 11 is also applied to the piston 5, causing the piston 5 to move downwards. After the fixing unit 42 separates from the frame 11, the piston 5 falls by its own weight, and the lubricating oil in the lower chamber enters the upper chamber through the one-way valve to replenish the lubricating oil.

[0022] It should be further explained that the fixing unit 42 includes a cylinder 421 and a clamping member 422. The number of cylinders 421 and clamping members 422 is at least two. The cylinder 421 is horizontally fixed on the piston 5 and drives the clamping member 422 to move the two clamping members 422 closer to or further away from each other.

[0023] In order to better fix the frame 11 by the fixing unit 42, when the frame 11 is placed into the receiving cavity 31, the clamping member 422 can be arranged opposite to the rack 112 on the frame 11, so that when the cylinder 421 drives the two clamping members 422 to approach, the rack 112 on the frame 11 located in the receiving cavity 31 can be clamped.

[0024] In the above embodiment, the power unit 41 includes a rotating component 411, a positioning post 412, a gear ring, a gear, and a motor. The rotating component 411 is coaxially rotatably mounted on the outer wall of the cylinder 3. The positioning post 412 is fixed on the top wall of the rotating component 411 and its top end extends upward to be adapted to be inserted into the mounting hole 121 on the nut 12 located on the support surface. The gear ring is coaxially fixed on the rotating component 411. The gear meshes with the gear ring. The motor is fixed on the cylinder 3 and drives the connecting gear.

[0025] The working process of the power unit 41 is as follows: the motor drives the gear to rotate, the gear drives the rotating part 411 to rotate through the gear ring, and the rotating part 411 drives the nut 12 to rotate on the support surface through the positioning pin 412.

[0026] 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 assembly auxiliary device, the steering gear including a frame (11) and a nut (12), the frame (11) having spaced screws (111) and racks (112) arranged from top to bottom, the frame (11) having a protrusion below the screws (111) that can abut against the nut (12), the nut (12) having a screw hole for helical connection with the screws (111) and an assembly hole (121) eccentrically arranged therewith, characterized in that, include: Base (2); The cylinder (3) is fixed on the base (2). The cylinder (3) has a receiving cavity (31). The top of the receiving cavity (31) has an opening and the top wall of the cylinder (3) has a support surface for supporting the nut (12). The frame (11) can enter the receiving cavity (31) through the opening. The receiving cavity (31) is filled with lubricating oil. A drive mechanism is used to drive the frame (11) located in the receiving cavity (31) to rotate relative to the nut (12) located on the support surface; When the frame (11) is placed into the receiving cavity (31), it is immersed in lubricating oil; A piston (5) is installed vertically and sealed inside the receiving cavity (31) to divide the receiving cavity (31) into an upper chamber and a lower chamber. The lower chamber is connected to an oil storage chamber opened on the base (2). A one-way valve is installed on the piston (5). A fixing unit (42) is installed on the piston (5). The bottom end of the piston (5) has a tapered counterweight with the tip pointing downwards.

2. The rig assembly aid of claim 1, wherein, The drive mechanism includes a power unit (41) for rotating the nut (12) and a fixing unit (42) for clamping and fixing the frame (11).

3. The director assembly aid of claim 1, wherein, The fixing unit (42) includes a cylinder (421) and a clamping member (422). There are at least two cylinders (421) and clamping members (422). The cylinder (421) is horizontally fixed on the piston (5) and drives the clamping member (422) to move the two clamping members (422) closer to or further away from each other.

4. The rig assembly aid of claim 1, wherein, When the cylinder (421) drives the two clamping parts (422) to approach each other, it can clamp the rack (112) located on the frame (11) inside the receiving cavity (31).

5. The director assembly aid of claim 2, wherein, The power unit (41) includes a rotating part (411), a positioning column (412), a gear ring, a gear, and a motor. The rotating part (411) is coaxially rotatably mounted on the outer wall of the cylinder (3). The positioning column (412) is fixed on the top wall of the rotating part (411) and extends upward to be adapted to be inserted into the mounting hole (121) on the nut (12) located on the support surface. The gear ring is coaxially fixed on the rotating part (411). The gear meshes with the gear ring. The motor is fixed on the cylinder (3) and drives the connecting gear.

6. The director assembly aid of claim 1, wherein, The inner wall of the receiving cavity (31) has an annular limiting part that can abut against the bottom wall of the protrusion on the frame (11), and the through hole in the annular limiting part can fit against the annular outer wall on the frame (11).

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