Oil pump internal rotation machining clamp

Abstract

The utility model relates to an oil pump internal rotation machining clamp. The oil pump internal rotation machining clamp comprises a chuck, a sliding block assembly, a linkage disc, a pull rod, a positioning disc and clamping fingers. The sliding block assembly is installed in the sliding block guide groove in a sliding mode, the clamping section of the clamping finger is fixed to the top face of the sliding block body, the clamping finger installation key is embedded into the clamping finger installation key groove, and the upper end of the clamping finger positioning pin is inserted into the finger positioning pin hole. The linkage disc is fixed on the top surface of the pull rod, each pair of linkage disc arm plates extend into the corresponding linkage disc arm plate guide grooves, the middle part of the connecting rod fixing pin penetrates into the inner end hole of the connecting rod, the linkage disc matching section of the pull rod is embedded into the pull rod guide cavity, and the linear bearing mounting section of the pull rod is mounted in the inner ring of the linear bearing; and the positioning disc is fixed on the top surface of the linkage disc guide strip. By means of the oil pump inner rotation clamping device, the oil pump inner rotation can be clamped more properly and stably, the oil pump inner rotation is more stable in the machining process, then the oil pump inner rotation with higher precision is obtained, and the reject ratio is reduced to a great extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of oil pump inner rotation processing clamps produced by powder metallurgy, and the utility model specifically discloses an oil pump inner rotation processing clamp. BACKGROUND

[0002] The function of oil pump is to force to send to the movement surface of each part of engine after oil is raised to certain pressure, and the structure of oil pump can be divided into two categories of gear type and rotor type, and inner rotor and outer rotor are indispensable components in rotor type oil pump, so the processing of inner rotor and outer rotor is particularly important, and the existing technology is complex in structure, high in production cost, low in working efficiency, and unstable clamping and vibration phenomenon are prone to occur during turning processing. SUMMARY

[0003] The utility model aims at overcoming the deficiencies in prior art, and provides an oil pump inner rotation processing clamp which can properly and stably clamp oil pump inner rotor and make it more stable during processing.

[0004] According to the technical scheme provided by the utility model, the oil pump inner rotation processing clamp comprises chuck, sliding block assembly, linkage disc, pull rod, positioning disc and clamping finger;

[0005] The chuck comprises cylindrical chuck body and linear bearing, positioning disc mounting cavity, linkage disc movable cavity and linear bearing mounting cavity are arranged from top to bottom in the center of the chuck body, the positioning disc mounting cavity, the linkage disc movable cavity and the linear bearing mounting cavity are all cylindrical cavities, a plurality of linkage disc guide strips are arranged on the chuck in uniform interval around the center of the chuck between the positioning disc mounting cavity and the linear bearing mounting cavity, the linkage disc guide strip is fan ring columnar structure, the adjacent sides on the adjacent two linkage disc guide strips are arranged in parallel, linkage disc arm plate guide grooves are formed between the adjacent sides on the adjacent two linkage disc guide strips, the inner sides of all the linkage disc guide strips are concentric, the inner sides of all the linkage disc guide strips form the linkage disc movable cavity, a plurality of sliding block guide grooves are arranged on the chuck body in uniform interval around the center of the chuck at the position corresponding to the positioning disc mounting cavity, rolling body guide grooves are arranged in the sliding block guide grooves, the inner ends of all the sliding block guide grooves are all directed to the center of the positioning disc mounting cavity, the number of the sliding block guide grooves is equal to that of the linkage disc guide strips, each sliding block guide groove is located above the linkage disc arm plate guide groove corresponding thereto, and the linear bearing is mounted in the linear bearing mounting cavity.

[0006] The sliding block assembly comprises sliding block body, clamping finger positioning pin, rolling body, rolling body stop sheet, connecting rod and connecting rod fixed pin.

[0007] The slider body and the slider guide groove are matched with each other, both sides of the slider body are provided with slider body rolling body grooves, the rolling bodies are constrained in the slider body rolling body grooves, the rolling bodies partially expose the slider body rolling body grooves, and the slider body rolling body groove and the rolling body guide groove form a circular track after being combined; a connecting rod mounting groove is arranged at the bottom of the slider body, slider body sliding rod fixed pin holes penetrating through the slider body are arranged on the slider body corresponding to the two side faces of the connecting rod mounting groove; a clamping finger mounting key groove is arranged on the top face of the slider body, and clamping finger mounting pin holes are arranged on the slider body corresponding to the clamping finger mounting key groove;

[0008] The clamping finger positioning pin is installed in the clamping finger mounting pin hole and is in interference fit with the clamping finger mounting pin hole, one slider body rolling body stop plate is fixed to each of the front end face and the rear end face of the slider body, a connecting rod outer end hole is arranged at the outer end of the connecting rod, and a connecting rod inner end hole is arranged at the inner end of the connecting rod, and the connecting rod fixed pin passes through the slider body connecting rod fixed pin hole and the connecting rod outer end hole to combine the slider body and the connecting rod together;

[0009] The linkage disc includes a linkage disc body, a pull rod guide cavity is arranged on the bottom face of the linkage disc body, a pair of linkage disc arm plates are fixed on the outer circle of the linkage disc body, the number of the linkage disc arm plates is equal to the number of the linkage disc arm plate guide grooves, a linkage disc connecting rod mounting groove is formed between each pair of the linkage disc arm plates, a linkage disc connecting rod fixed pin hole is arranged on all the linkage disc arm plates, and a connecting rod fixed pin is installed in the linkage disc connecting rod fixed pin hole of each pair of the linkage disc arm plates;

[0010] The pull rod includes a cylindrical linkage disc matching section, a linear bearing mounting section and a machining equipment connecting thread section which are coaxially connected together from top to bottom, the linkage disc matching section is matched with the pull rod guide cavity, and the linear bearing mounting section is matched with the inner ring of the linear bearing;

[0011] The positioning disc includes a circular plate-shaped positioning disc limiting section and a product positioning section which are coaxially fixed together, the product positioning section is located above the positioning disc limiting section, the outer diameter of the product positioning section is smaller than that of the positioning disc limiting section, and a tool avoiding cavity is arranged on the top face of the product positioning section;

[0012] The clamping finger includes a clamping finger mounting key and a finger clamping section which are fixed together, a finger clamping face matched with the tooth surface of an inner rotating part of an oil pump to be clamped is arranged at one end of the clamping section, and a finger positioning pin hole is arranged on the clamping finger mounting key and the finger clamping section;

[0013] The slider assembly is slidingly installed in the slider guide slot, the clamping section of the clamping finger is fixed on the top surface of the slider body, the clamping finger installation key is embedded in the clamping finger installation key slot, the finger clamping surface faces the center of the chuck body, and the upper end of the clamping finger positioning pin is inserted into the finger positioning pin hole;

[0014] The connecting disk is fixed on the top surface of the pull rod, each pair of connecting disk arm plates extends into the corresponding connecting disk arm plate guide slot, each pair of connecting disk arm plates is in clearance fit with the connecting disk arm plate guide slot, the middle part of the connecting rod fixed pin penetrates into the connecting rod inner end hole, the connecting disk fit section of the pull rod is embedded into the pull rod guide cavity, the linear bearing installation section of the pull rod is installed in the inner ring of the linear bearing, and the processing equipment connecting thread section of the pull rod extends out of the chuck.

[0015] The positioning disk is fixed on the top surface of the connecting disk guide strip, and the outer circle of the positioning disk limiting section is in clearance fit with the positioning disk installation cavity.

[0016] As preferred, the slide body is provided with a rolling body stopper locking screw thread hole on the front end surface and the rear end surface, a stopper through hole is formed in the rolling body stopper, and the stopper fixing screw passes through the stopper through hole and combines and fixes the rolling body stopper with the slide body by using the rolling body stopper locking screw thread hole.

[0017] As preferred, the connecting disk body is provided with a pull rod fixing screw countersunk hole in the center, the pull rod fixing screw countersunk hole is connected with the pull rod guide cavity, the pull rod fixing screw countersunk hole and the pull rod guide cavity penetrate through the top surface and the bottom surface of the connecting disk body, a pull rod combination screw thread hole is arranged in the center of the top surface of the connecting disk fit section, and the pull rod locking screw passes through the pull rod fixing screw countersunk hole and the pull rod guide cavity and combines and fixes the connecting disk with the pull rod by using the pull rod combination screw thread hole.

[0018] As preferred, the connecting disk guide strip is provided with a positioning disk locking screw thread hole in the top surface, a positioning disk locking countersunk hole is formed in the positioning disk, the positioning disk locking countersunk hole penetrates through the top surface and the bottom surface of the positioning disk, and the positioning disk locking screw passes through the positioning disk locking countersunk hole and combines and fixes the positioning disk with the connecting disk guide strip by using the positioning disk locking screw thread hole.

[0019] As preferred, the positioning disk locking countersunk hole is arranged on the positioning disk limiting section, the product positioning section or the connecting position of the positioning disk limiting section and the product positioning section.

[0020] As preferred, the clamping finger locking screw is further included, the clamping finger fixing screw countersunk hole is arranged on the clamping finger mounting key and the finger clamping section, the clamping finger fixing screw threaded hole is arranged on the slider body in the slider body corresponding to the clamping finger mounting key groove, and the clamping finger locking screw is combined and fixed with the slider body through the clamping finger fixing screw countersunk hole and the clamping finger fixing screw threaded hole.

[0021] The utility model discloses can more properly and stably hold the oil pump inner rotation, make the oil pump inner rotation more stable when processing, and further get higher precision oil pump inner rotation, greatly reduce the defective rate, avoid the phenomenon of shaking sword caused by unstable clamping. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the perspective view of the chuck in the utility model.

[0023] Figure 2 It is the top view of the chuck in the utility model.

[0024] Figure 3 It is the A-A sectional view of Figure 2 .

[0025] Figure 4 It is the top view of the chuck in the utility model.

[0026] Figure 5 It is the B-B sectional perspective view of Figure 4 .

[0027] Figure 6 It is the perspective view of the slider assembly in the utility model.

[0028] Figure 7 It is the perspective view of the slider body in the slider assembly.

[0029] Figure 8 It is the perspective view of the rolling body stop sheet in the slider assembly.

[0030] Figure 9 It is the perspective view of the connecting rod in the slider assembly.

[0031] Figure 10 It is the top view of the linkage disc in the utility model.

[0032] Figure 11 It is the C-C sectional perspective view of Figure 10 .

[0033] Figure 12 It is the perspective view of the pull rod in the utility model.

[0034] Figure 13 It is the top view of the positioning disc in the utility model.

[0035] Figure 14 yes Figure 13 DD cutaway stereogram.

[0036] Figure 15 It is a top view of the clamping finger in the present invention.

[0037] Figure 16 yes Figure 15 Left view of .

[0038] Figure 17 yes Figure 15 EE cutaway perspective view.

[0039] Figure 18 It is a top view of the utility model in use state.

[0040] Figure 19 yes Figure 18 FF cutaway perspective view.

[0041] Figure 20 yes Figure 18 GG cutaway stereogram.

[0042] Figure 21 This is a three-dimensional diagram of the rotating parts inside the oil pump. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0044] An oil pump internal rotation processing fixture, which includes a chuck 1, a slider assembly 2, a linkage plate 3, a pull rod 4, a positioning plate 6 and a clamping finger 8;

[0045] like Figures 1-5As shown, the chuck 1 includes a cylindrical chuck body 1-1 and a linear bearing 1-2, a positioning disc mounting cavity 1-1-1, a linkage disc movable cavity 1-1-2 and a linear bearing mounting cavity 1-1-3 are arranged in the center of the chuck body 1-1 from top to bottom, respectively, the positioning disc mounting cavity 1-1-1, the linkage disc movable cavity 1-1-2 and the linear bearing mounting cavity 1-1-3 are all cylindrical cavities, a plurality of linkage disc guide strips 1-1-6 are arranged on the chuck 1 and uniformly distributed around the center of the chuck 1, the linkage disc guide strip 1-1-6 is a fan ring columnar structure, the adjacent sides of the adjacent two linkage disc guide strips 1-1-6 are arranged in parallel, the linkage disc arm plate guide groove 1-1-7 is formed between the adjacent sides of the adjacent two linkage disc guide strips 1-1-6, the inner sides of all the linkage disc guide strips 1-1-6 are concentric, and the inner sides of all the linkage disc guide strips 1-1-6 form the linkage disc movable cavity 1-1-2, a plurality of slider guide grooves 1-1-4 are formed on the chuck body 1-1 corresponding to the position of the positioning disc mounting cavity 1-1-1 and uniformly distributed around the center of the chuck 1, a rolling body guide groove 1-1-41 is arranged in the slider guide groove 1-1-4, the inner ends of all the slider guide grooves 1-1-4 are directed to the center of the positioning disc mounting cavity 1-1-1, the number of the slider guide grooves 1-1-4 is equal to that of the linkage disc guide strips 1-1-6, each slider guide groove 1-1-4 is located above the corresponding linkage disc arm plate guide groove 1-1-7, and the linear bearing 1-2 is mounted in the linear bearing mounting cavity 1-1-3.

[0046] In the utility model, the number of the slider guide grooves 1-1-4 is 4-8, and the number of the slider guide grooves 1-1-4 is preferably 6.

[0047] As shown in the figure, Figures 6-9 The slider assembly 2 includes a slider body 2-1, a clamping finger positioning pin 2-2, a rolling body 2-3, a rolling body stop sheet 2-4, a connecting rod 2-6 and a connecting rod fixing pin 2-7.

[0048] The slider body 2-1 cooperates with the slider guide groove 1-1-4, and slider body rolling body grooves 2-1-1 are arranged on both sides of the slider body 2-1. The rolling body 2-3 is constrained in the slider body rolling body groove 2-1-1, and the rolling body 2-3 partially exposes the slider body rolling body groove 2-1-1. The slider body rolling body groove 2-1-1 and the rolling body guide groove 1-1-41 combine to form a circular track. A connecting rod mounting groove 2-1-2 is arranged at the bottom of the slider body 2-1. Slider connecting rod fixing pin holes 2-1-3 are arranged on the slider body 2-1 corresponding to the two side faces of the connecting rod mounting groove 2-1-2. A clamping finger mounting key groove 2-1-4 is arranged on the top surface of the slider body 2-1. Clamping finger mounting pin holes 2-1-5 are arranged on the slider body 2-1 corresponding to the clamping finger mounting key groove 2-1-4.

[0049] The clamping finger positioning pin 2-2 is installed in the clamping finger mounting pin hole 2-1-5 and is in interference fit with the clamping finger mounting pin hole 2-1-5. A rolling body stop plate 2-4 is fixed to each of the front end face and the rear end face of the slider body 2-1. A connecting rod outer end hole 2-6-1 is arranged at the outer end of the connecting rod 2-6, and a connecting rod inner end hole 2-6-2 is arranged at the inner end of the connecting rod 2-6. The connecting rod fixing pin 2-7 combines the slider body 2-1 and the connecting rod 2-6 together through the slider connecting rod fixing pin hole 2-1-3 and the connecting rod outer end hole 2-6-1.

[0050] As shown in Figure 10 and Figure 11 The connecting rod 3 includes a connecting rod body 3-1. A pull rod guide cavity 3-5 is arranged on the bottom surface of the connecting rod body 3-1. A pair of connecting rod arm plates 3-2 are fixed to the outer circle of the connecting rod body 3-1. The number of the connecting rod arm plates 3-2 is equal to the number of the connecting rod arm plate guide grooves 1-1-7. A connecting rod connecting rod mounting groove is formed between each pair of the connecting rod arm plates 3-2. Connecting rod connecting rod fixing pin holes 3-3 are arranged on all the connecting rod arm plates 3-2. A connecting rod fixing pin 2-7 is installed in each connecting rod connecting rod fixing pin hole 3-3 of each pair of the connecting rod arm plates 3-2.

[0051] As shown in Figure 12 The pull rod 4 includes a cylindrical connecting rod matching segment 4-1, a linear bearing mounting segment 4-2, and a machining equipment connecting thread segment 4-3, which are coaxially connected together from top to bottom. The connecting rod matching segment 4-1 cooperates with the pull rod guide cavity 3-5. The linear bearing mounting segment 4-2 cooperates with the inner ring of the linear bearing 1-2.

[0052] As shown in Figure 13 and Figure 14As shown, the positioning disc 6 includes a circular plate-shaped positioning disc limiting segment 6-1 and a product positioning segment 6-2 fixed coaxially together, the product positioning segment 6-2 is located above the positioning disc limiting segment 6-1, the outer diameter of the product positioning segment 6-2 is smaller than that of the positioning disc limiting segment 6-1, and a knife-avoiding cavity 6-4 is formed on the top surface of the product positioning segment 6-2;

[0053] As shown in the figure, Figures 15-17 The clamping finger 8 includes a clamping finger mounting key 8-1 and a finger clamping segment 8-2 fixed together, one end of the clamping segment 8-2 is provided with a finger clamping surface 8-3 matched with the tooth surface 10-1 of the oil pump inner rotor 10 (as shown in the figure) to be clamped, and a finger positioning pin hole 8-4 is formed on the clamping finger mounting key 8-1 and the finger clamping segment 8-2. Figure 21

[0054] As shown in the figure, Figures 18-20 The sliding block assembly 2 is slidingly installed in the sliding block guide groove 1-1-4, the clamping segment 8-2 of the clamping finger 8 is fixed to the top surface of the sliding block body 2-1, the clamping finger mounting key 8-1 is embedded in the clamping finger mounting key groove 2-1-4, the finger clamping surface 8-3 faces the center of the chuck body 1-1, and the upper end of the clamping finger positioning pin 2-2 is inserted into the finger clamping pin hole 8-4.

[0055] The connecting disc 3 is fixed to the top surface of the pull rod 4, each pair of connecting disc arm plates 3-2 extends into the corresponding connecting disc arm plate guide groove 1-1-7, each pair of connecting disc arm plates 3-2 and the connecting disc arm plate guide groove 1-1-7 are gap matched, the middle part of the connecting rod fixed pin 2-7 is inserted into the connecting rod inner end hole 2-6-2, the connecting disc matching segment 4-1 of the pull rod 4 is embedded in the pull rod guide cavity 3-5, the linear bearing mounting segment 4-2 of the pull rod 4 is installed in the inner ring of the linear bearing 1-2, and the processing equipment connecting thread segment 4-3 of the pull rod 4 extends out of the chuck 1.

[0056] The positioning disc 6 is fixed to the top surface of the connecting disc guide strip 1-1-6, and the outer circle of the positioning disc limiting segment 6-1 is gap matched with the positioning disc mounting cavity 1-1-1.

[0057] It also includes a flake fixing screw 2-5, a rolling body flake locking screw thread hole 2-1-7 is formed on the front end surface and the rear end surface of the sliding block body 2-1, a flake through hole 2-4-1 is formed on the rolling body flake 2-4, and the flake fixing screw 2-5 passes through the flake through hole 2-4-1 and combines and fixes the rolling body flake 2-4 and the sliding block body 2-1 by using the rolling body flake locking screw thread hole 2-1-7.

[0058] ​Further comprising a pull rod locking screw 5, a pull rod fixing screw countersunk hole 3-4 is arranged at the center of the linkage disc body 3-1, the pull rod fixing screw countersunk hole 3-4 is connected with a pull rod guide cavity 3-5, the pull rod fixing screw countersunk hole 3-4 and the pull rod guide cavity 3-5 penetrate the top surface and the bottom surface of the linkage disc body 3-1, a pull rod combination threaded hole 4-4 is arranged at the center of the top surface of the linkage disc cooperation section 4-1, the pull rod locking screw 5 is combined and fixed with the linkage disc 3 and the pull rod 4 by the pull rod fixing screw countersunk hole 3-4, the pull rod guide cavity 3-5 and the pull rod combination threaded hole 4-4.

[0059] Further comprising a positioning disc locking screw 7, a positioning disc locking threaded hole 1-1-5 is arranged on the top surface of the linkage disc guide strip 1-1-6, a positioning disc locking countersunk hole 6-3 is arranged on the positioning disc 6, the positioning disc locking countersunk hole 6-3 penetrates the top surface and the bottom surface of the positioning disc 6, the positioning disc locking screw 7 is combined and fixed with the linkage disc guide strip 1-1-6 by the positioning disc locking countersunk hole 6-3 and the positioning disc locking threaded hole 1-1-5.

[0060] The positioning disc locking countersunk hole 6-3 is arranged on the positioning disc limiting section 6-1, the product positioning section 6-2 or the connecting position of the positioning disc limiting section 6-1 and the product positioning section 6-2.

[0061] Further comprising a clamping finger locking screw 9, a clamping finger fixing screw countersunk hole 8-5 is arranged on the clamping finger mounting key 8-1 and the finger clamping section 8-2, a clamping finger fixing threaded hole 2-1-6 is arranged on the slider body 2-1 in the slider body 2-1 corresponding to the clamping finger mounting key groove 2-1-4, the clamping finger locking screw 9 is combined and fixed with the clamping finger 8 and the slider body 2-1 by the clamping finger fixing screw countersunk hole 8-5 and the clamping finger fixing threaded hole 2-1-6.

[0062] In the assembly, the slider assembly 2 is arranged on the top surface of the chuck 1 through the slider guide groove 1-1-4, and is slid into the slider guide groove 1-1-4 from outside to inside. At this time, the rolling body guide groove 2-1-1, the slider body rolling body groove 1-1-41 and the rolling body 2-3 form a mechanism that enables the slider assembly 2 to smoothly slide in the slider guide groove 1-1-4. Then, the other end of the connecting rod 2-6 is connected between the pair of linkage disc arm plates 3-2 arranged in the linkage disc 3. After the connecting rod fixing pin 2-7 is connected through the linkage disc pin hole 3-3 and the inner end hole 2-6-2 of the connecting rod, the slider assembly 2 and the linkage disc 3 are combined, and the linkage disc 3 is arranged in the linkage disc movable cavity 1-1-2 arranged in the chuck 1.

[0063] The cooperation section 4-1 of the pull rod 4 is placed into the cooperation section 4-1 of the chuck 3 from the bottom end of the chuck 1, and it is confirmed that the cooperation section 4-1 is successfully placed into the guide cavity 3-5 of the pull rod, then the pull rod 4 is combined with the chuck 3 by screwing the pull rod fixing screws 5 through the screw holes 3-4 and the screw holes 4-4.

[0064] One end of the product positioning section 6-2 of the positioning disc 6 is upward, one end of the positioning section 6-1 is placed into the positioning block installation cavity 1-1-1 of the chuck 1, and the positioning disc 6 is fixed on the chuck 1 by screwing the positioning block locking screws 7 through the locking screw holes 6-3 and the screw holes 1-1-5.

[0065] The clamping finger installation key 8-1 and the finger positioning pin hole 8-4 of the clamping finger 8 are aligned with the finger installation key groove 2-1-4 and the clamping finger positioning pin 2-2, then the clamping finger 8 is placed into the slider assembly 2, and the clamping finger 8 is locked and combined with the slider assembly 2 by screwing the clamping finger locking screws 9 through the screw holes 8-5 and the screw holes 2-1-6.

[0066] In specific work, the processing device connecting thread section 4-3 on the pull rod 4 is connected to the hydraulic pull rod on the CNC lathe, and the processing clamp of the oil pump inner rotor of the utility model is fixed on the rotating main shaft of the lathe by using the clamping jaw or locking method.

[0067] The reference surface 10-2 (i.e. the bottom surface of the oil pump inner rotor 10) of the oil pump inner rotor 10 to be processed is closely attached to the top surface of the product positioning section 6-2, the hydraulic pull rod on the numerical control lathe pulls the pull rod 2 downward, at this time, the chuck 3 and the connecting rod 2-6 in the slider assembly 2 move the slider assembly 2 to the center, and then the tooth surface 10-1 of the oil pump inner rotor 10 is clamped by the finger clamping surface 8-3 of the clamping finger 8, and the top surface of the oil pump inner rotor 10 and the inner hole 10-3 of the oil pump inner rotor 10 are processed.

[0068] In the utility model, the slider assembly 2 adopts a precise and stable slide design structure, which drives the clamping finger 8 to properly and stably clamp the oil pump inner rotor 10, so that the oil pump inner rotor 10 is more stable during processing, and a higher precision oil pump inner rotor 10 is obtained, thereby greatly reducing the defective rate.

[0069] Moreover, the replaceability of the clamping fingers 8 also allows the present invention to be used for more similar oil pump internal rotation 10 processing by simply replacing different clamping fingers 8, thereby increasing the availability of the oil pump internal rotation processing fixture of the present invention, enabling it to bring higher economic benefits to the industry, indirectly reducing manufacturing costs and improving industry competitiveness.

[0070] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An internal turning fixture for an oil pump characterized by: It includes chuck (1), slider assembly (2), linkage plate (3), pull rod (4), positioning disc (6) and clamping finger (8); The chuck (1) includes a cylindrical chuck body (1-1) and a linear bearing (1-2), a positioning disc mounting cavity (1-1-1), a linkage plate movable cavity (1-1-2) and a linear bearing mounting cavity (1-1-3) are arranged from top to bottom in the center of the chuck body (1-1), the positioning disc mounting cavity (1-1-1), the linkage plate movable cavity (1-1-2) and the linear bearing mounting cavity (1-1-3) are all cylindrical cavities, a plurality of linkage plate guide strips (1-1-6) are arranged around the center of the chuck (1) and uniformly distributed between the positioning disc mounting cavity (1-1-1) and the linear bearing mounting cavity (1-1-3), the linkage plate guide strip (1-1-6) is a fan ring columnar structure, the adjacent sides of the adjacent two linkage plate guide strips (1-1-6) are arranged in parallel, the adjacent sides of the adjacent two linkage plate guide strips (1-1-6) form linkage plate arm plate guide grooves (1-1-7), the inner sides of all the linkage plate guide strips (1-1-6) are concentric, the inner sides of all the linkage plate guide strips (1-1-6) form the linkage plate movable cavity (1-1-2), a plurality of slider guide grooves (1-1-4) are arranged around the center of the chuck (1) and uniformly distributed on the chuck body (1-1) corresponding to the positioning disc mounting cavity (1-1-1), a rolling body guide groove (1-1-41) is arranged in the slider guide groove (1-1-4), the inner ends of all the slider guide grooves (1-1-4) are directed to the center of the positioning disc mounting cavity (1-1-1), the number of the slider guide grooves (1-1-4) is equal to that of the linkage plate guide strips (1-1-6), each slider guide groove (1-1-4) is located above the corresponding linkage plate arm plate guide groove (1-1-7), the linear bearing (1-2) is mounted in the linear bearing mounting cavity (1-1-3); The slider assembly (2) includes a slider body (2-1), a clamping finger positioning pin (2-2), a rolling body (2-3), a rolling body stop sheet (2-4), a connecting rod (2-6) and a connecting rod fixing pin (2-7); The slider body (2-1) is matched with the slider guide groove (1-1-4), slider body rolling body grooves (2-1-1) are arranged on both sides of the slider body (2-1), the rolling body (2-3) is constrained in the slider body rolling body groove (2-1-1), the rolling body (2-3) partially exposes the slider body rolling body groove (2-1-1), the slider body rolling body groove (2-1-1) and the rolling body guide groove (1-1-41) are combined to form a circular track; a connecting rod mounting groove (2-1-2) is arranged at the bottom of the slider body (2-1), slider connecting rod fixing pin holes (2-1-3) are arranged on the slider body (2-1) corresponding to the two side faces of the connecting rod mounting groove (2-1-2) and penetrating the slider body (2-1); a clamping finger mounting key groove (2-1-4) is arranged on the top surface of the slider body (2-1), and a clamping finger mounting pin hole (2-1-5) is arranged on the slider body (2-1) corresponding to the clamping finger mounting key groove (2-1-4); The clamping finger positioning pin (2-2) is installed in the clamping finger mounting pin hole (2-1-5) and is in interference fit with the clamping finger mounting pin hole (2-1-5), one of the rolling body stop sheets (2-4) is fixed to the front end face of the slider body (2-1), and the other rolling body stop sheet (2-4) is fixed to the rear end face of the slider body (2-1), a connecting rod outer end hole (2-6-1) is arranged at the outer end of the connecting rod (2-6), and a connecting rod inner end hole (2-6-2) is arranged at the inner end of the connecting rod (2-6), the connecting rod fixing pin (2-7) is combined with the slider body (2-1) and the connecting rod (2-6) through the slider connecting rod fixing pin hole (2-1-3) and the connecting rod outer end hole (2-6-1); The connecting disk (3) comprises a connecting disk body (3-1), a pull rod guide cavity (3-5) is arranged on the bottom surface of the connecting disk body (3-1), a pair of connecting disk arm plates (3-2) are fixed on the outer circle of the connecting disk body (3-1), the number of the connecting disk arm plates (3-2) is equal to the number of the connecting disk arm plate guide grooves (1-1-7), a connecting disk connecting rod mounting groove is formed between each pair of the connecting disk arm plates (3-2), connecting disk connecting rod fixing pin holes (3-3) are arranged on all the connecting disk arm plates (3-2), and a connecting rod fixing pin (2-7) is installed in the connecting disk connecting rod fixing pin hole (3-3) of each pair of the connecting disk arm plates (3-2); The pull rod (4) comprises a connecting disk matching section (4-1) in a cylindrical shape, a linear bearing mounting section (4-2) and a machining equipment connecting thread section (4-3) which are coaxially connected together from top to bottom, the connecting disk matching section (4-1) is matched with the pull rod guide cavity (3-5), and the linear bearing mounting section (4-2) is matched with the inner ring of the linear bearing (1-2). The positioning disc (6) comprises a circular plate-shaped positioning disc limiting section (6-1) and a product positioning section (6-2) fixed coaxially together, the product positioning section (6-2) is located above the positioning disc limiting section (6-1), the outer diameter of the product positioning section (6-2) is smaller than that of the positioning disc limiting section (6-1), and a tool-avoiding cavity (6-4) is formed in the top surface of the product positioning section (6-2); The clamping finger (8) comprises a clamping finger mounting key (8-1) and a finger clamping section (8-2) fixed together, one end of the clamping section (8-2) is provided with a finger clamping surface (8-3) matched with the tooth surface of the inner rotating part of the oil pump to be clamped, and a finger positioning pin hole (8-4) is formed in the clamping finger mounting key (8-1) and the finger clamping section (8-2). The sliding block assembly (2) is slidingly installed in the sliding block guide groove (1-1-4), the clamping section (8-2) of the clamping finger (8) is fixed to the top surface of the sliding block body (2-1), the clamping finger mounting key (8-1) is embedded in the clamping finger mounting key groove (2-1-4), the finger clamping surface (8-3) faces the center of the chuck body (1-1), and the upper end of the clamping finger positioning pin (2-2) is inserted into the finger positioning pin hole (8-4). The connecting disc (3) is fixed to the top surface of the pull rod (4), each pair of the connecting disc arm plates (3-2) extends into the corresponding connecting disc arm plate guide groove (1-1-7), each pair of the connecting disc arm plates (3-2) and the connecting disc arm plate guide groove (1-1-7) are in clearance fit, the middle part of the connecting rod fixed pin (2-7) is inserted into the connecting rod inner end hole (2-6-2), the connecting disc fitting section (4-1) of the pull rod (4) is embedded in the pull rod guide cavity (3-5), the linear bearing mounting section (4-2) of the pull rod (4) is installed in the inner ring of the linear bearing (1-2), and the processing equipment connecting thread section (4-3) of the pull rod (4) extends out of the chuck (1). The positioning disc (6) is fixed to the top surface of the connecting disc guide strip (1-1-6), and the outer circle of the positioning disc limiting section (6-1) is in clearance fit with the positioning disc mounting cavity (1-1-1).

2. The in-process fixture for an oil pump rotor as set forth in claim 1, wherein: The gear plate fixing screw (2-5) is arranged, rolling body gear plate locking screw holes (2-1-7) are formed in the front end surface and the rear end surface of the sliding block body (2-1), a gear plate through hole (2-4-1) is formed in the rolling body gear plate (2-4), and the gear plate fixing screw (2-5) passes through the gear plate through hole (2-4-1) and combines and fixes the rolling body gear plate (2-4) and the sliding block body (2-1) by using the rolling body gear plate locking screw holes (2-1-7).

3. The in-process oil pump inner turning fixture of claim 1, wherein: The linkage disc body (3-1) is provided with a pull rod fixing screw countersunk hole (3-4) in the center, the pull rod fixing screw countersunk hole (3-4) is connected with a pull rod guide cavity (3-5), the pull rod fixing screw countersunk hole (3-4) and the pull rod guide cavity (3-5) penetrate the top surface and the bottom surface of the linkage disc body (3-1), the linkage disc cooperation section (4-1) is provided with a pull rod combination threaded hole (4-4) in the center of the top surface, the pull rod locking screw (5) is combined and fixed with the pull rod (4) through the pull rod fixing screw countersunk hole (3-4) and the pull rod guide cavity (3-5) and the pull rod combination threaded hole (4-4).

4. The in-process fixture for an oil pump rotor as set forth in claim 1, wherein: The positioning disc locking screw (7) is combined and fixed with the linkage disc guide strip (1-1-6) through the positioning disc locking countersunk hole (6-3) and the positioning disc locking threaded hole (1-1-5).

5. The in-process oil pump inner fixture of claim 4, wherein: The positioning disc locking countersunk hole (6-3) is arranged on the positioning disc limiting section (6-1), the product positioning section (6-2) or the connecting position of the positioning disc limiting section (6-1) and the product positioning section (6-2).

6. The in-process oil pump inner fixture of claim 1, wherein: The clamping finger locking screw (9) is combined and fixed with the slider body (2-1) through the clamping finger fixing screw countersunk hole (8-5) and the clamping finger fixing threaded hole (2-1-6).

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