An automatic clamping device for grinding the pin hole of a high-pressure oil pump tappet

Abstract

The present invention discloses an automatic clamping device for grinding a pin hole of a high-pressure oil pump tappet, which relates to the technical field of clamping devices, and comprises a positioning plate, a clamping block and a positioning block arranged relatively on the positioning plate, and the clamping block can move relative to the positioning block; the pressing surface of the positioning block also has a retractable positioning pin. The present invention not only ensures the verticality of the pin hole relative to the outer circle, but also ensures the verticality of the roller bearing after assembly, thereby improving the quality of the oil pump tappet and greatly increasing the service life of the engine.

Description

Technical Field

[0001] The invention relates to the technical field of clamping devices, and in particular to an automatic clamping device for grinding a pin hole of a high-pressure oil pump tappet. Background Art

[0002] The oil pump tappet is an important component of an automobile engine that uses a high-pressure oil pump system. It is installed between the drive cam and the tappet, converting the rotational motion of the drive cam into linear reciprocating motion while pushing the tappet to move. The main structure includes a guide sleeve, a bracket, a roller bearing and a pin.

[0003] For a long time, the pin holes on the guide sleeves are no longer machined after stamping, and when the roller tappets are assembled, the guide sleeves are first heat treated and ground. However, during the grinding process, since the guide sleeves have just completed the heat treatment, the guide sleeves are easily deformed during the grinding process, so that after the outer circle of the guide sleeves is ground, the proportion of the pin holes on the guide sleeves relative to the outer circle that are unqualified in perpendicularity increases, making the roller bearings unqualified in perpendicularity after assembly. Therefore, all roller tappets need to be inspected after the roller bearings are assembled to eliminate unqualified products (about 20%). If unqualified roller tappets are directly installed and used, the bearings on the roller tappets will be worn eccentrically, which will eventually greatly reduce the life of the engine. Summary of the invention

[0004] The object of the present invention is to provide an automatic clamping device for grinding the pin hole of a high-pressure oil pump tappet to solve the above-mentioned problem.

[0005] In order to achieve the purpose of the present invention, the technical solution adopted is: an automatic clamping device for grinding the pin hole of a high-pressure oil pump tappet, comprising a positioning plate, a clamping block and a positioning block arranged relatively on the positioning plate, and the clamping block can move relative to the positioning block; the clamping surface of the positioning block also has a retractable positioning pin.

[0006] Furthermore, a positioning shaft is installed on the positioning plate, and the central axis of the positioning shaft is located between the positioning block and the clamping block.

[0007] Furthermore, an adjustment seat assembly is fixedly mounted on the positioning plate, and the positioning shaft is mounted on the adjustment seat assembly.

[0008] Furthermore, a fixing seat is installed on the positioning plate, a sliding block is installed on the fixing seat, and a clamping block is installed on the sliding block; a driving mechanism for driving the clamping block to slide is also installed on the positioning plate.

[0009] Furthermore, a fixing plate, a mounting plate and a limiting plate are sequentially mounted on the back of the positioning plate, and the driving mechanism is commonly mounted in the fixing plate, the mounting plate and the limiting plate.

[0010] Furthermore, the installation plate has a groove in which a piston assembly that can move up and down is installed; and a pull rod that drives the slider to slide is installed in the piston assembly.

[0011] Furthermore, the positioning plate also has an installation groove, and a rotating shaft is installed in the installation groove, a shift fork and a clamping lever are fixedly installed on the rotating shaft, and the extending end of the clamping lever is movable with the slider; the pull rod extends into the installation groove, and the pull rod also has a pin, and the extending end of the shift fork is inserted in the pin.

[0012] Furthermore, the sliding block is provided with an inserting groove, and the extending end of the clamping lever is inserted into the inserting groove.

[0013] Furthermore, a guide pin is fixedly installed in the groove, and a guide hole cooperating with the guide pin is provided on the piston assembly.

[0014] Furthermore, the pull rod is provided with a disc; the piston assembly comprises a mounting block and a pressing block, and the disc is pressed onto the mounting block through the pressing block.

[0015] Furthermore, the positioning block is provided with a fixing groove and a positioning seat closing the fixing groove; the tail of the positioning pin extends into the fixing groove, and a return spring is installed between the tail of the positioning pin and the positioning seat.

[0016] Furthermore, the tail of the positioning pin also has a limiting step, the return spring is sleeved on the positioning pin, and one end of the return spring is against the limiting step, and the other end of the return spring is against the positioning seat.

[0017] Furthermore, the positioning block and the clamping block are both V-shaped.

[0018] The beneficial effects of the present invention are:

[0019] The guide sleeve is clamped by cooperating with the clamping block and the positioning block; and a retractable positioning pin is installed on the positioning block, so that when the guide sleeve is installed, the positioning pin is inserted into the positioning hole on the guide sleeve, thereby realizing accurate positioning of the guide sleeve, and the guide sleeve can be accurately fixed, effectively preventing the guide sleeve from being deformed during the grinding process, which not only ensures the verticality of the pin hole relative to the outer circle, but also ensures the verticality of the roller bearing after assembly, thereby improving the quality of the oil pump tappet and greatly improving the service life of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the automatic clamping device for grinding the pin hole of a high-pressure oil pump tappet provided by the present invention;

[0021] Figure 2 The cross-sectional view of the automatic clamping device for grinding the pin hole of the high-pressure oil pump tappet provided by the present invention Figure 1 ;

[0022] Figure 3 The cross-sectional view of the automatic clamping device for grinding the pin hole of the high-pressure oil pump tappet provided by the present invention Figure 2 .

[0023] Markings and corresponding parts names in the attached drawings:

[0024] 1. Positioning plate, 2. Clamping block, 3. Positioning block, 4. Positioning pin, 5. Positioning shaft, 6. Adjusting seat assembly, 7. Fixed seat, 8. Mounting hole, 9. Slider, 10. Driving mechanism, 11. Fixed plate, 12. Mounting plate, 13. Limiting plate, 14. Groove, 15. Mounting groove, 16. Plug-in groove, 17. Guide pin, 18. Guide hole, 19. Fixed groove, 20. Positioning seat, 21. Return spring, 22. Limiting step;

[0025] 101, piston assembly, 102, pull rod, 103, rotating shaft, 104, shift fork, 105, clamping lever, 106, latch, 107, shaft seat;

[0026] 1011. mounting block, 1012. disc, 1013. pressing groove, 1014. pressing block. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0028] Figure 1 , Figure 2 , Figure 3 The present invention shows an automatic clamping device for grinding a pin hole of a high-pressure oil pump tappet, which includes a positioning plate 1, a clamping block 2 and a positioning block 3 which are relatively arranged on the positioning plate 1, and the clamping block 2 can move relative to the positioning block 3; the clamping surface of the positioning block 3 also has a retractable positioning pin 4.

[0029] The spacing between the clamping block 2 and the positioning block 3 is adjusted by moving the clamping block 2 relative to the positioning block 3. When the guide sleeve needs to be polished, the guide sleeve is placed between the positioning block 3 and the clamping block 2. The guide sleeve is clamped between the positioning block 3 and the clamping block 2 by moving the clamping block 2 to fix the guide sleeve. The pressing surface of the positioning block 3 is the side of the positioning block 3 that presses the guide sleeve. When the guide sleeve needs to be clamped, the positioning pin 4 cooperates with the positioning hole on the guide sleeve so that the positioning pin 4 is inserted into the positioning hole on the guide sleeve to position the guide sleeve. This not only makes the clamping of the guide sleeve more precise, but also effectively prevents the guide sleeve from being deformed during the grinding process, ensures the verticality of the pin hole relative to the outer circle, and ensures the verticality of the roller bearing after assembly, thereby improving the quality of the oil pump tappet and greatly improving the service life of the engine.

[0030] By setting the positioning pin 4 to be retractable, it is not only convenient to insert the positioning pin 4 into the positioning hole of the guide sleeve, but also effectively prevents the positioning pin 4 from causing damage to the guide sleeve when inserted into the positioning hole of the guide sleeve; at the same time, when the guide sleeve is ground, the guide sleeve can be quickly removed from between the positioning block 3 and the clamping block 2.

[0031] A positioning shaft 5 is also installed on the positioning disk 1, and the central axis of the positioning shaft 5 is located between the positioning block 3 and the clamping block 2; the central axis of the positioning shaft 5 is perpendicular to the axis between the positioning block 3 and the clamping block 2, and the positioning shaft 5 is a stepped shaft, and the small diameter end of the positioning shaft 5 matches the inner diameter of the guide sleeve. When the guide sleeve needs to be clamped, the guide sleeve is first inserted into the small diameter end of the positioning shaft 5, and the end of the guide sleeve is abutted against the step surface of the positioning shaft 5, so that the end of the guide sleeve is limited; after the guide sleeve is set on the positioning shaft 5, when the positioning pin 4 needs to be inserted into the positioning hole of the guide sleeve, the guide sleeve can be directly rotated. When the positioning hole on the guide sleeve corresponds to the positioning pin 4, the positioning pin 4 is automatically inserted into the positioning hole on the guide sleeve to realize the positioning of the guide sleeve, so that the position of the guide sleeve is more accurate after being clamped, thereby giving the guide sleeve a higher accuracy after grinding.

[0032] An adjustment seat assembly 6 is also fixedly mounted on the positioning plate 1, and the positioning shaft 5 is mounted on the adjustment seat assembly 6; the adjustment seat assembly 6 is a support fixedly mounted on the positioning plate 1, and the positioning shaft 5 is fixedly mounted on the support by screws, making the installation and disassembly of the positioning shaft 5 more convenient.

[0033] A fixing seat 7 is also installed on the positioning disk 1, a sliding slider 9 is installed on the fixing seat 7, and the clamping block 2 is installed on the slider 9; a driving mechanism 10 for driving the clamping block 2 to slide is also installed on the positioning disk 1; the fixing seat 7 is fixedly installed on the outer surface of the positioning disk 1, and the positioning seat 20 is hollow, and a mounting hole 8 consistent with the sliding direction of the slider 9 is opened on the fixing seat 7; the slider 9 is installed in the mounting hole 8, the slider 9 can fully slide in the mounting hole 8, and the slider 9 and the clamping block 2 are fixed by screws; the driving mechanism 10 is used to drive the slider 9 to slide along the mounting hole 8, and the slider 9 is driven by the driving mechanism 10 to slide, and the slider 9 drives the clamping block 2 to move when sliding, so that the distance between the clamping block 2 and the positioning block 3 becomes larger or smaller, thereby achieving the clamping or loosening of the guide sleeve.

[0034] A fixing plate 11, a mounting plate 12 and a limiting plate 13 are sequentially mounted on the back of the positioning plate 1, and the driving mechanism 10 is jointly mounted in the fixing plate 11, the mounting plate 12 and the limiting plate 13; the positioning plate 1, the fixing plate 11, the mounting plate 12 and the limiting plate 13 are successively fixed by screws, and the maximum diameters of the positioning plate 1, the fixing plate 11, the mounting plate 12 and the limiting plate 13 are equal, so that the positioning plate 1, the fixing plate 11, the mounting plate 12 and the limiting plate 13 form a cylindrical shape after being fixed, so that the present invention forms an integral structure, and by jointly mounting the driving mechanism 10 in the fixing plate 11, the mounting plate 12 and the limiting plate 13, the outer surface of the present invention is smoother, making the present invention more beautiful.

[0035] The mounting plate 12 has a groove 14 in which a piston assembly 101 that can move up and down is installed; a pull rod 102 that drives the slider 9 to slide is installed in the piston assembly 101; the groove 14 is arranged on the opposite surface of the mounting plate 12 and the limiting plate 13, and the groove bottom of the groove 14 and the limiting plate 13 jointly limit the movement of the piston assembly 101, so that the piston assembly 101 can move fully in the groove 14, and the movement of the piston assembly 101 drives the pull rod 102 to move synchronously, and the movement of the pull rod 102 drives the slider 9 to slide on the fixed seat 7, and finally the slider 9 drives the clamping block 2 to move, so that the distance between the clamping block 2 and the positioning block 3 changes, and the guide sleeve is clamped.

[0036] The limiting plate 13 is annular, which can not only limit the groove 14, but also facilitate the connection between the linear drive element on the processing lathe and the piston assembly 101; in order to make the connection between the linear drive element on the processing lathe and the piston assembly 101 more convenient, a connecting piece can also be fixedly installed on the piston assembly 101.

[0037] The positioning disk 1 also has a mounting groove 15, and a rotating shaft 103 is also installed in the mounting groove 15, a shift fork 104 and a clamping lever 105 are fixedly installed on the rotating shaft 103, and the extended end of the clamping lever 105 is movably connected to the slider 9; the pull rod 102 extends into the mounting groove 15, and the pull rod 102 also has a latch 106, and the extended end of the shift fork 104 is inserted into the latch 106; the mounting groove 15 is located on the surface opposite to the positioning disk 1 and the mounting disk 12, so that the positioning disk 1 is in the shape of a cap; the mounting disk 12 is also fixedly installed with a shaft seat 107, and the shaft seat 107 extends into the mounting groove 15, and the The rotating shaft 103 is rotatably mounted on the extended end of the shaft seat 107, so that the rotating shaft 103 can fully rotate in the mounting groove 15; in order to make the structure in the mounting groove 15 simpler, the two ends of the rotating shaft 103 can also be directly rotatably supported on the groove wall of the mounting groove 15 using bearing seats; the latch 106 is fixed on the extended end of the pull rod 102, and the extended end of the shift fork 104 is inserted on the latch 106. When the pull rod 102 moves back and forth, the pull rod 102 drives the shift fork 104 to swing, and when the shift fork 104 swings, it drives the rotating shaft 103 to rotate, thereby causing the clamping lever 105 installed on the rotating shaft 103 to swing synchronously.

[0038] The clamping lever 105 passes through the positioning plate 1 and the mounting plate 12 in sequence and extends into the fixing seat 7. The holes on the positioning plate 1 and the mounting plate 12 through which the clamping lever 105 passes can ensure that the clamping lever 105 can swing fully, so that the clamping lever 105 can drive the slider 9 to move when swinging, thereby driving the slider 9 to move.

[0039] The shift fork 104 and the clamping lever 105 are an integrated structure. At this time, the rotating shaft 103 can be fixedly installed on the shaft seat 107, and the shift fork 104 can swing on the rotating shaft 103, so that when the pull rod 102 moves back and forth, the pulling energy can drive the shift fork 104 to swing on the rotating shaft 103, thereby allowing the clamping lever 105 to swing.

[0040] The slider 9 is provided with an insertion slot 16, and the extended end of the clamping lever 105 is inserted into the insertion slot 16. When the clamping lever 105 is swinging, the clamping lever 105 can drive the slider 9 to slide on the fixed seat 7, thereby driving the clamping block 2 to move forward or backward. The clamping lever 105 and the slider 9 can also be hinged by a hinge ear, so that the clamping lever 105 can drive the slider 9 to slide when swinging.

[0041] A guide pin 17 is also fixedly installed in the groove 14, and a guide hole 18 cooperating with the guide pin 17 is also opened on the piston assembly 101; there are multiple guide pins 17, and the multiple guide pins 17 are evenly spaced circumferentially arranged along the central circumference of the groove 14; there are multiple guide holes 18, and the multiple guide holes 18 correspond to the multiple guide pins 17 one by one, and the guide holes 18 and the guide pins 17 are clearance-matched; through the cooperation between the guide pins 17 and the guide holes 18, when the piston assembly 101 moves in the groove 14, the guide pin 17 can guide the movement of the piston assembly 101, thereby effectively preventing the piston assembly 101 from rotating during the movement, and finally effectively preventing the pin 106 from falling off from the fork 104 due to the rotation of the pull rod 102.

[0042] The pull rod 102 is provided with a disc 1012; the piston assembly 101 includes a mounting block 1011 and a clamping block 1014, and the disc 1012 is clamped on the mounting block 1011 by the clamping block 1014; the disc 1012 and the pull rod 102 are integrally arranged; the mounting block 1011 is also provided with a clamping groove 1013, and the disc 1012 is mounted in the clamping groove 1013, and the clamping block 1014 is clamped on the disc 1012, and the disc 1012 and the clamping block 1014 are fixed together in the clamping groove 1013 by screws, so that the surface of the piston assembly 101 remains flat, which not only realizes the fixation of the pull rod 102, but also facilitates the piston assembly 101 to fully move in the groove 14.

[0043] The positioning block 3 also has a fixing groove 19 and a positioning seat 20 that closes the fixing groove 19; the tail of the positioning pin 4 extends into the fixing groove 19, and a return spring 21 is installed between the tail of the positioning pin 4 and the positioning seat 20; the axial direction of the fixing groove 19 is consistent with the moving direction of the clamping block 2, and the positioning seat 20 is fixedly installed on the positioning block 3 by screws, so that the positioning groove is closed; the tail of the positioning pin 4 extends into the fixing groove 19, and the return spring 21 is installed between the tail of the positioning pin 4 and the positioning seat 20, so that the front end of the positioning pin 4 can move into the positioning groove when pressure is applied, so that the return spring 21 is compressed; when the positioning pin 4 corresponds to the positioning hole on the guide sleeve, the pressure on the front end of the positioning pin 4 disappears, and at this time the return spring 21 pushes the positioning pin 4 forward through its own elastic force, so that the positioning pin 4 is accurately clamped on the positioning hole of the guide sleeve, thereby realizing the positioning of the guide sleeve.

[0044] The tail of the positioning pin 4 also has a limiting step 22, and the return spring 21 is sleeved on the positioning pin 4, and one end of the return spring 21 is against the limiting step 22, and the other end of the return spring 21 is against the positioning seat 20, which can effectively limit the return spring 21 and prevent the return spring 21 from tilting or separating from the support of the positioning pin 4, so that the return of the positioning pin 4 is guaranteed and the service life of the return spring 21 is improved.

[0045] The positioning block 3 and the clamping block 2 are both V-shaped, so that the positioning block 3 and the clamping block 2 have a better clamping effect on the guide sleeve.

[0046] When it is necessary to grind the guide sleeve, first push the positioning pin 4 to retract into the fixed groove 19, and then insert the guide sleeve on the positioning shaft 5. After the guide sleeve is inserted on the positioning shaft 5, rotate the guide sleeve. When the positioning hole on the guide sleeve corresponds to the positioning pin 4, the front end of the positioning pin 4 loses the clamping force. At this time, the return spring 21 in the fixed groove 19 pushes the positioning pin 4 forward through its own elastic force, so that the positioning pin 4 is accurately inserted into the positioning hole on the guide sleeve, thereby realizing the positioning of the guide sleeve.

[0047] Next, the linear drive element on the machine tool drives the piston assembly 101 to move along the groove 14 toward the limit plate 13. When the piston assembly 101 moves, the piston assembly 101 drives the pull rod 102 to move synchronously. The movement of the pull rod 102 drives the fork 104 to swing. The swing of the fork 104 drives the clamping lever 105 to swing. When the clamping lever 105 swings, the extended end of the clamping lever 105 pushes the slider 9 forward, so that the clamping block 2 fixed with the slider 9 moves forward synchronously, so that the clamping block 2 gradually clamps the guide sleeve, and finally the guide sleeve is fixed.

[0048] When the guide sleeve is ground, the linear drive element on the machine tool drives the piston assembly 101 to move along the groove 14 toward the fixed disk 11. When the piston assembly 101 moves, the piston assembly 101 drives the pull rod 102 to move synchronously. The movement of the pull rod 102 drives the fork 104 to swing. The swing of the fork 104 drives the clamping lever 105 to swing. When the clamping lever 105 swings, the extended end of the clamping lever 105 pushes the slider 9 to retreat, so that the clamping block 2 fixed with the slider 9 retreats synchronously, so that the clamping block 2 gradually moves away from the guide sleeve, and the clamping block 2 loses its clamping on the guide sleeve. At this time, the positioning pin 4 is pushed to move into the fixed groove 19, so that the positioning pin 4 moves out of the positioning hole of the guide sleeve. Finally, the guide sleeve can be removed from the positioning shaft 5.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic clamping device for grinding a tappet pin hole of a high-pressure oil pump, characterized in that: The invention comprises a positioning disk (1), a clamping block (2) and a positioning block (3) arranged relatively to each other on the positioning disk (1), and the clamping block (2) can move relative to the positioning block (3); the pressing surface of the positioning block (3) also has a retractable positioning pin (4); a positioning shaft (5) is also installed on the positioning disk (1), and the central axis of the positioning shaft (5) is located between the positioning block (3) and the clamping block (2); an adjustment seat assembly (6) is also fixedly installed on the positioning disk (1), and the positioning shaft (5) is installed on the adjustment seat assembly (6); a fixed seat (7) is also installed on the positioning disk (1), a sliding slider (9) is installed on the fixed seat (7), and the clamping block (2) is installed on the slider (9); the positioning disk (1) ) is also installed with a driving mechanism (10) for driving the clamping block (2) to slide; the back of the positioning plate (1) is also installed with a fixed plate (11), a mounting plate (12) and a limit plate (13) in sequence, and the driving mechanism (10) is installed together in the fixed plate (11), the mounting plate (12) and the limit plate (13); the mounting plate (12) has a groove (14), and a piston assembly (101) that can move up and down is installed in the groove (14); a pull rod (102) for driving the slider (9) to slide is installed in the piston assembly (101); a guide pin (17) is also fixedly installed in the groove (14), and a guide hole (18) cooperating with the guide pin (17) is also opened on the piston assembly (101).

2. The automatic clamping device for grinding the pin hole of a high-pressure oil pump tappet according to claim 1, characterized in that: The positioning plate (1) also has a mounting groove (15), and a rotating shaft (103) is installed in the mounting groove (15); a shift fork (104) and a clamping lever (105) are fixedly installed on the rotating shaft (103), and an extended end of the clamping lever (105) is movable with the slider (9); the pull rod (102) extends into the mounting groove (15), and the pull rod (102) also has a latch (106), and the extended end of the shift fork (104) is inserted into the latch (106).

3. The automatic clamping device for grinding the pin hole of a high-pressure oil pump tappet according to claim 2, characterized in that: The slide block (9) is provided with an inserting groove (16), and the extending end of the clamping lever (105) is inserted into the inserting groove (16).

4. The automatic clamping device for grinding the pin hole of a high-pressure oil pump tappet according to claim 1, 2 or 3, characterized in that: The pull rod (102) is provided with a disc (1012); the piston assembly (101) comprises a mounting block (1011) and a pressing block (1014); the disc (1012) is pressed onto the mounting block (1011) via the pressing block (1014).

5. The automatic clamping device for grinding the pin hole of a high-pressure oil pump tappet according to claim 1, characterized in that: The positioning block (3) is also provided with a fixing groove (19) and a positioning seat (20) closing the fixing groove (19); the tail of the positioning pin (4) extends into the fixing groove (19), and a return spring (21) is installed between the tail of the positioning pin (4) and the positioning seat (20).

6. The automatic clamping device for grinding the pin hole of a high-pressure oil pump tappet according to claim 5, characterized in that: The tail of the positioning pin (4) also has a limiting step (22), and the return spring (21) is sleeved on the positioning pin (4), and one end of the return spring (21) is against the limiting step (22), and the other end of the return spring (21) is against the positioning seat (20).

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