Power steering oil pump pulley assembly apparatus

Abstract

The application discloses a power steering oil pump pulley assembling device, which comprises a pull rod for being connected with a pump shaft of a power steering oil pump, a positioning seat for placing a pulley, a positioning sleeve arranged on the positioning seat and used for coaxially arranging the pulley and the pump shaft of the power steering oil pump, and a driving device connected with the pull rod, wherein the positioning sleeve is sleeved on the pull rod, and the driving device is arranged to control the pull rod to move linearly along a set direction, so that the pump shaft of the power steering oil pump is inserted into a center hole of the pulley. The power steering oil pump pulley assembling device can ensure that the pulley cannot be inclined and pressed during the process of being assembled on the pump shaft, can improve the assembling effect of the power steering oil pump and the pulley of the hydraulic power steering system, and can improve the assembling efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of vehicle steering systems. Specifically, this invention relates to a power steering pump pulley assembly device. Background Technology

[0002] As the power source of the hydraulic power steering system, the power steering pump has been used to this day due to its advantages such as compact structure, uniform flow, high volumetric efficiency, low noise and smooth operation. The driving force for the power steering pump is mainly obtained through the belt connection between the pulley and the engine pulley.

[0003] The existing assembly fixture for pulleys is assembled using a double-column hydraulic press, with a pulley fixing device at the lower station and a pump shaft pulling device at the upper station. The following problems exist:

[0004] 1. The upper and lower workstation devices are not on the same axis. During the process of installing the pulley into the pump shaft, it is easy for it to tilt, causing the pulley to be severely squeezed on one side, which affects the appearance of the oil pump assembly.

[0005] 2. The pulley assembly tie rod is universal, but the large gap between the tie rod and the pump shaft section of the pulley causes severe shaking and the tie rod is prone to breakage, affecting assembly efficiency.

[0006] The aim is to provide an improved assembly device for the power steering pump pulley, particularly regarding how to improve the assembly effect of the power steering pump and pulley in a hydraulic power steering system. Summary of the Invention

[0007] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a power steering pump pulley assembly device, the purpose of which is to improve the assembly effect of the power steering pump and pulley in a hydraulic power steering system.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a power steering pump pulley assembly device, comprising a tie rod for connecting to the pump shaft of the power steering pump, a positioning seat for placing the pulley, a positioning sleeve disposed on the positioning seat and making the pulley and the pump shaft of the power steering pump coaxial, and a drive device connected to the tie rod. The positioning sleeve is sleeved on the tie rod, and the drive device is configured to control the tie rod to move linearly in a set direction, so that the pump shaft of the power steering pump is inserted into the center hole of the pulley.

[0009] The tie rod is threadedly connected to the pump shaft of the power steering pump, and the upper end of the tie rod is provided with an external thread.

[0010] The power steering pump pulley assembly equipment also includes a positioning base, which is mounted on the positioning base by a first bolt.

[0011] The power steering pump pulley assembly equipment also includes a bench panel, the positioning base is disposed on the bench panel, the tie rod passes through the center hole of the positioning base, and the drive device is located below the bench panel.

[0012] The driving device includes a drive motor, a power transmission mechanism connected to the drive motor, and a sliding plate connected to the power transmission mechanism. The sliding plate is connected to a fixed base, and the fixed base is connected to the pull rod.

[0013] The power transmission mechanism includes a first transmission mechanism connected to the drive motor and a second transmission mechanism connected to the first transmission mechanism, and the sliding plate is connected to the second transmission mechanism.

[0014] The second transmission mechanism includes a lead screw, a lead screw guide rail that cooperates with the lead screw, and a guide rail frame connected to the lead screw guide rail. The sliding plate is connected to the guide rail frame.

[0015] The lead screw is mounted on a positioning plate, and a sliding rail is provided on the positioning plate. The sliding plate is sleeved on the sliding rail.

[0016] The first transmission mechanism is a belt drive mechanism.

[0017] The power steering pump pulley assembly equipment of the present invention can ensure that there will be no tilting or squeezing during the installation of the pulley into the pump shaft, which can improve the assembly effect of the power steering pump and the pulley of the hydraulic power steering system and improve the assembly efficiency. Attached Figure Description

[0018] This manual includes the following figures, which illustrate the following:

[0019] Figure 1 This is a front view of the power steering pump pulley assembly equipment of the present invention;

[0020] Figure 2 This is a partial bottom view of the power steering pump pulley assembly equipment of the present invention;

[0021] Figure 3 This is a right view of the power steering pump pulley assembly equipment of the present invention;

[0022] Figure 4 This is a partial sectional view of the power steering pump pulley assembly equipment of the present invention;

[0023] Figure 5 This is a top view of the power steering pump pulley assembly equipment of the present invention;

[0024] Figure 6 This is an assembly diagram of the power steering pump pulley assembly equipment of the present invention;

[0025] Figure 7This is an axonometric view of the power steering pump pulley assembly equipment of the present invention;

[0026] The diagram is marked as follows:

[0027] 1. Pull rod; 2. Positioning sleeve; 3. Positioning base; 4. Stand panel; 5. Fixed base; 6. Sliding plate; 7. First bolt; 8. Sliding rail; 9. Positioning plate; 10. M14 hex nut; 11. Digital display panel; 12. Positioning seat; 13. Start button; 14. Guide rail frame; 15. Lead screw guide rail; 16. Lead screw; 17. Bearing seat; 18. Outer plate; 19. Motor positioning base plate; 20. Belt; 21. Drive pulley; 22. φ10 flat washer; 23. Drive motor; 24. Locking block; 25. Locking bolt; 26. Second bolt; 27. Power steering pump; 28. Pulley. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and to facilitate its implementation.

[0029] It should be noted that in the following embodiments, the terms "first," "second," and "third" do not represent an absolute distinction in structure and / or function, nor do they represent the order of execution; they are merely for the convenience of description.

[0030] like Figures 1 to 7 As shown, the present invention provides a power steering pump pulley assembly device, including a frame, a tie rod 1 for connecting to the pump shaft of the power steering pump, a positioning seat 12 for placing the pulley, a positioning sleeve 2 disposed on the positioning seat 12 and making the pulley and the pump shaft of the power steering pump coaxial, and a drive device connected to the tie rod 1. The positioning sleeve 2 is sleeved on the tie rod 1, and the drive device is configured to control the tie rod 1 to move linearly in a set direction, so that the pump shaft of the power steering pump is inserted into the center hole of the pulley.

[0031] Specifically, such as Figures 1 to 7 As shown, the power steering pump pulley assembly equipment provided by the present invention solves the problems of easy tilting, severe compression, and easy breakage of pulley 1 during the assembly process. The purpose is to simplify operation, improve efficiency, and improve product quality.

[0032] like Figures 1 to 7As shown, the power steering pump pulley assembly equipment of the present invention further includes a positioning base 3 and a frame panel 4. The frame panel 4 is fixedly mounted on a frame, and the positioning seat 12 is mounted on the positioning base 3 by a first bolt 7. A digital display panel 11 and a start button 13 are provided on the frame. The frame panel 4 is horizontally positioned, and the positioning base 3 is mounted on the frame panel 4. The pull rod 1 passes through the center hole of the positioning base 3, and the drive device is located below the frame panel 4. The pull rod 1, the positioning seat 12, the positioning sleeve 2, and the positioning base 3 constitute a tooling assembly. Its main function is to position the pulley to be assembled so that the center of the power steering pump shaft is on the same axis, ensuring that the pulley will not tilt during assembly, and also to support product changeover.

[0033] like Figure 1 , Figure 4 and Figure 5 As shown, a positioning outer circular step device is provided at the center of the positioning base plate, and the positioning outer circular step device is inserted into the center hole provided on the platform panel 4. A positioning outer circular step device is provided at the center of the positioning seat 12, and the positioning outer circular step device is inserted into the center hole provided on the positioning base plate. The positioning seat 12 is fixed and locked to the positioning base plate by first bolts 7. There are 4 first bolts 7 in total, and the first bolts 7 are M10×35 hexagon socket head cap screws. A positioning outer circular step is provided at the center of the positioning sleeve 2, and the positioning outer circular step is inserted into the center hole provided on the positioning seat 12, but is not locked. The positioning sleeve 2, positioning seat 12, positioning base plate and pull rod 1 are coaxially arranged, and the axis of pull rod 1 is a vertical line.

[0034] Preferably, the pull rod 1 is threadedly connected to the pump shaft of the power steering pump. The upper end of the pull rod 1 has an external thread, and the pull rod 1 passes through the center hole of the positioning sleeve 2, thus engaging with the positioning sleeve 2. By configuring the pull rod 1 and positioning sleeve 2 as a matching combination, when assembling different models or different sizes of pump shafts, only the pull rod 1 and positioning sleeve 2 need to be replaced for quick model changeover. When replacing the positioning sleeve 2, it can be directly removed from the positioning seat 12 for replacement, making the operation convenient and simple.

[0035] like Figures 1 to 4 As shown, the driving device includes a drive motor 23, a power transmission mechanism connected to the drive motor 23, and a sliding plate 6 connected to the power transmission mechanism. The sliding plate 6 is connected to a fixed base 5, and the fixed base 5 is connected to a pull rod 1. The sliding plate 6 is horizontally positioned, and the fixed base 5 is fixedly mounted on the top surface of the sliding plate 6. The sliding plate 6 and the fixed base 5 are located below the platform panel 4. After the drive motor 23 operates, it drives the sliding plate 6 to move linearly in the vertical direction through the power transmission mechanism. The sliding plate 6 drives the fixed base 5 and the pull rod 1 to move linearly synchronously.

[0036] Preferably, the lower end of the pull rod 1 is threaded to the fixed base 5, and the lower end of the pull rod 1 is provided with an external thread to facilitate disassembly and assembly when replacing the pull rod 1.

[0037] like Figures 1 to 7 As shown, the power transmission mechanism includes a first transmission mechanism connected to the drive motor 23 and a second transmission mechanism connected to the first transmission mechanism, and the sliding plate 6 is connected to the second transmission mechanism.

[0038] Preferably, the second transmission mechanism includes a lead screw 16, a lead screw guide rail 15 cooperating with the lead screw 16, and a guide rail frame 14 connected to the lead screw guide rail 15. The sliding plate 6 is connected to the guide rail frame 14. The lead screw guide rail 15 and the lead screw 16 form a helical transmission. The lead screw guide rail 15 is connected to the guide rail frame 14, and the guide rail frame 14 is fixedly connected to the upper sliding plate 6. The lead screw 16 is vertically arranged, and its lower end is connected to the output end of the first transmission mechanism, which transmits power to the lead screw 16. The lead screw 16 is mounted on a positioning plate 9, and a sliding rail 8 is provided on the positioning plate 9. The sliding plate 6 is sleeved on the sliding rail 8.

[0039] like Figure 1 , Figure 3 and Figure 4 As shown, the sliding plate 6 is located below the platform panel 4, and four sliding rails 8 pass through the sliding plate 6, guiding it. The sliding plate 6 can slide up and down along the sliding rails 8. A positioning step hole is located at the center of the sliding plate 6 in the fixed base 5. The lower end of the fixed base 5 is fixed to the sliding plate 6 by four second bolts 26 (M10×70 hexagonal socket head cap screws). The upper end of the fixed base 5 has an M18 internal threaded hole for connection with the pull rod 1. The guide rail frame 14 is fixed to the sliding plate 6 by four first bolts 7, and four M10 threaded holes are located below the sliding plate 6. The lower end of the lead screw 16 is interference-fitted with two lead screw support bearings, which are housed in bearing seats 17. The bearing seats 17 are fixed to the positioning plate 9 by four first bolts 7. The upper end of the sliding rail 8 is fixedly connected to the platform panel 4, and the lower end of the sliding rail 8 is fixedly connected to the positioning plate 9.

[0040] like Figure 1 and Figure 2 As shown, in this embodiment, the first transmission mechanism is a belt transmission mechanism. The first transmission mechanism includes a driving pulley 21, a driven pulley, and a belt 20 that cooperates with the driving pulley 21 and the driven pulley. The driving pulley 21 is fixedly installed at the output end of the drive motor 23, and the driven pulley is fixedly installed at the lower end of the lead screw 16.

[0041] like Figures 1 to 3As shown, the lower end of the lead screw 16 is fixedly connected to the driven pulley by three first bolts 7, and the shaft end of the drive motor 23 is fixedly connected to the driving pulley 21 by three first bolts 7. The driving pulley 21 and the driven pulley are connected by a belt 20 and tightened by adjusting the locking bolt 25. When the driven pulley obtains power through the belt 20, it will drive the lead screw 16 to rotate. The rotational motion of the lead screw is converted into the up and down linear motion of the sliding plate 6 through the lead screw guide rail 15, thereby realizing the conversion of the motion direction.

[0042] In this embodiment, the lead screw assembly located in the middle for vertical movement has advantages such as high precision, accurate positioning, wear resistance, and long service life. It includes a fixed base 5 positioned above the sliding plate 6 and an ultra-precision lead screw guide rail 15 below it. Its main function is to convert the rotational motion of the lead screw into the axial motion of the pulley assembly device via the lead screw guide rail 15, thus realizing the pulley assembly function. The pulley assembly located at the bottom for power transmission mainly functions to transmit the kinetic energy output by the servo motor to the lead screw assembly through the belt and pulleys, driving the lead screw assembly to rotate.

[0043] In this embodiment, the drive motor 23 is a servo motor, which has the advantages of high precision, fast response, strong programmability and high reliability. Its main function is to output electrical energy in the form of kinetic energy to drive the rotation of the transmission mechanism, and it is the power source of the entire device.

[0044] like Figures 1 to 3 As shown, two extension plates 18 are provided on the positioning plate 9. The extension plates 18 are fixedly connected to the positioning plate 9 by four first bolts 7. A motor positioning base plate 19 is provided below the extension plates 18. The drive motor 23 is fixed to the extension plates 18 by another four first bolts 7. The shaft end of the drive motor 23 passes through the motor positioning base plate 19 and is connected to the drive pulley 21 by three first bolts 7. Two M10 internal threads are provided on the right side of the motor positioning base plate 19. The locking block 24 is connected by two first bolts 7. Bolt 7 is fixedly connected to the motor positioning base plate 19. Two locking bolts 25 are set on the locking block 24 at the corresponding position of the outer extension plate 18, passing through the locking block 24 and over the top on the right side of the two outer extension plates 18. Two elongated grooves that can move left and right are set on the motor positioning base plate 19. Four first bolts 7 and φ10 flat washers 22 are set in the elongated grooves and connected to the outer extension plates 18. The tension of the belt 20 is adjusted by rotating the locking bolts 25. After the adjustment is completed, the four first bolts 7 under the motor positioning base plate 19 are locked.

[0045] The working process of the power steering pump pulley assembly equipment provided by this invention is as follows:

[0046] 1. Determine the specifications of the pull rod 1 and positioning sleeve 2 required based on the product model;

[0047] 2. Manually screw the pull rod 1 into the fixed base 5 and tighten the pull rod 1 with a wrench. Then, put the positioning sleeve 2 into the positioning seat 12 and put the positioning sleeve 2 on the pull rod 1.

[0048] 3. Start the start button 13 on the start stand. The limit position of the pull rod 1 will be displayed on the digital display panel 11. Set the relevant parameters according to the assembly size requirements.

[0049] 4. Place the pulley to be assembled upside down on the positioning seat 12. The positioning sleeve 2 positions the pulley. The pump shaft of the power steering pump is installed on the upper end of the tie rod 1. The pump shaft of the power steering pump and the pulley are coaxial.

[0050] 5. Start the start button 13 on the start stand, drive the motor 23 to run, pull rod 1 drives the pump shaft of the power steering pump to move downward in a straight line, and the pump shaft of the power steering pump is installed into the center hole of the pulley from top to bottom;

[0051] 6. After the lever 1 moves to the set position, it will quickly return to the origin. Remove the power steering pump equipped with the pulley. Assembly is complete.

[0052] The power steering pump pulley assembly equipment with the above-described structure has the following advantages:

[0053] 1. There will be no tilting or squeezing during the installation of the pulley into the pump shaft;

[0054] 2. The tie rod 1 matches the positioning sleeve 2, the pump shaft has a small gap and no wobbling before being installed into the pulley, and the tie rod 1 is not easy to break;

[0055] 3. Simple operation, improved efficiency, and improved product quality.

[0056] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A power steering pump pulley assembly device, characterized in that: The device includes a tie rod for connecting to the pump shaft of a power steering pump, a positioning seat for placing a pulley, a positioning sleeve disposed on the positioning seat and coaxial with the pump shaft of the power steering pump, and a drive device connected to the tie rod. The positioning sleeve is fitted onto the tie rod, and the drive device is configured to control the tie rod to move linearly in a set direction so that the pump shaft of the power steering pump is inserted into the center hole of the pulley. The positioning base has a positioning outer circular step at its center, which is inserted into the center hole on the platform panel; the positioning seat has a positioning outer circular step at its center, which is inserted into the center hole on the positioning base; the positioning seat is fixed and locked to the positioning base by four first bolts; the positioning sleeve has a positioning outer circular step at its center, which is inserted into the center hole on the positioning seat but is not locked; the positioning sleeve, positioning seat, positioning base and pull rod are coaxial, and the axis of the pull rod is a vertical line; The tie rod is threaded to the pump shaft of the power steering pump. The upper end of the tie rod has an external thread. The tie rod passes through the center hole of the positioning sleeve and mates with the positioning sleeve. The tie rod and the positioning sleeve are designed as a matching combination. When assembling different models of products, only the tie rod and the positioning sleeve need to be replaced to achieve quick model change. When replacing the positioning sleeve, the positioning sleeve is directly removed from the positioning seat for replacement. The drive unit includes a drive motor, a power transmission mechanism connected to the drive motor, and a sliding plate connected to the power transmission mechanism. The sliding plate is connected to a fixed base, and the fixed base is connected to a tie rod. The sliding plate is horizontally positioned, and the fixed base is fixedly positioned on the top surface of the sliding plate. The sliding plate and the fixed base are located below the platform panel. After the drive motor is turned, it drives the sliding plate to move linearly in the vertical direction through the power transmission mechanism. The sliding plate drives the fixed base and the tie rod to move linearly synchronously. The lower end of the pull rod is threaded to the fixed base, and the lower end of the pull rod is provided with an external thread; The power transmission mechanism includes a first transmission mechanism connected to the drive motor and a second transmission mechanism connected to the first transmission mechanism, with the sliding plate connected to the second transmission mechanism; The second transmission mechanism includes a lead screw, a lead screw guide rail that cooperates with the lead screw, and a guide rail frame connected to the lead screw guide rail. A sliding plate is connected to the guide rail frame. The lead screw guide rail and the lead screw form a helical transmission. The lead screw guide rail is connected to the guide rail frame, and the guide rail frame is fixedly connected to the upper sliding plate. The lead screw is vertically arranged, and its lower end is connected to the output end of the first transmission mechanism. The first transmission mechanism transmits power to the lead screw. The lead screw is set on a positioning plate, and a sliding rail is set on the positioning plate. The sliding plate is sleeved on the sliding rail. The sliding plate is located below the platform panel, and the sliding rail passes through the sliding plate. The sliding rail guides the sliding plate, and the sliding plate can slide up and down along the sliding rail. The lower end of the fixed base is fixed and locked to the sliding plate by four second bolts; the guide rail frame is fixed and locked to the sliding plate by one first bolt, and a threaded hole is provided at the bottom of the sliding plate; the lower end of the lead screw is interference-fitted with two lead screw support bearings, the bearings are set in bearing seats, and the bearing seats are fixed and locked to the positioning plate by one first bolt; the upper end of the sliding rail is fixedly connected to the platform panel, and the lower end of the sliding rail is fixedly connected to the positioning plate. Two extended plates are provided on the positioning plate. The extended plates are fixedly connected to the positioning plate by a first bolt. A motor positioning base plate is provided below the extended plates. The extended plates are fixed to the drive motor by the first bolt. The shaft end of the drive motor passes through the motor positioning base plate and is connected to the drive pulley by a first bolt. The locking block is fixedly connected to the motor positioning base plate by a first bolt. Two locking bolts are provided on the locking block at the corresponding positions of the extended plates, passing through the locking block and over the top on the right side of the two extended plates. Two elongated grooves that can move left and right are provided on the motor positioning base plate. A first bolt and a flat washer are provided in the elongated grooves and connected to the extended plates. The tension of the belt is adjusted by rotating the locking bolts. After adjustment, the first bolt below the motor positioning base plate is locked.

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