Positioning device for connecting rod machining

Abstract

The utility model relates to a positioning device for processing a connecting rod. The positioning device comprises a mounting plate arranged on an output transmission shaft of a gearbox of a lathe, a fixed seat arranged at the central position of the mounting plate, a core shaft arranged on the fixed seat, and a first screw rod arranged at the tail end of the core shaft; a counter weight and a bracket are installed on the installation plate, the counter weight and the bracket are arranged on the two sides of the core shaft respectively, a connecting sleeve of a connecting rod is arranged on the core shaft in a sleeving mode and fixed through a limiting piece installed on the first screw rod, and a connecting disc of the connecting rod is lifted and fixed through the bracket; the distance between the bracket and the mandrel is adjustable, and the bracket is connected with the mounting plate through an adjusting mechanism. The upper portion of the connecting rod is fixed through cooperation of the mandrel and the limiting piece, the lower portion of the connecting rod is fixed through the bracket, the bracket is simple in structure, firm in fixation and extremely low in failure rate, the situation that fixation is not firm in the rotating process of the connecting rod is avoided, and the machining effect of the milling arc surface is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting rod processing, in particular to a positioning device used for connecting rod processing. Background Art

[0002] The structure of the connecting rod product includes a connecting sleeve at the top, a connecting neck in the middle and a connecting disk at the bottom. Mounting holes are evenly distributed on the disk surface of the connecting disk. The top of the connecting sleeve is an arc surface. The arc surface needs to be milled by a lathe during the production process. Before milling the arc surface, the connecting rod product needs to be positioned and fixed.

[0003] In order to achieve the fixing of the connecting rod, patent application number 2018110295712, a method and device for clamping the arc surface of a finely processed connecting rod, discloses the following technical scheme: it includes a fixed workpiece unit for clamping the workpiece, the fixed workpiece unit includes two clamping seats, which are installed on the front upper side of the fixed seat flange, and a counterweight block is installed at the bottom of the fixed seat flange. The rear side of the fixed seat flange is coaxially connected to the head frame flange, and the front side of the fixed seat flange is coaxially connected to the clamping mandrel connecting flange. The front side of the clamping mandrel connecting flange is coaxially installed with a workpiece clamping mandrel, and the workpiece clamping mandrel is composed of a coaxial connecting portion, a cylindrical supporting portion and a locking portion from back to front, the locking portion is provided with an external thread, and the connecting portion is coaxially fixed to the front side of the clamping mandrel connecting flange, and the cylindrical supporting portion is sequentially sleeved with an outer tapered sleeve, an expansion inner tapered sleeve and a gap pad from back to front, and the locking portion is sleeved with a locking nut, and a recessed notch is left on the outer surface of the lower front end of the cylindrical supporting portion of the workpiece clamping mandrel.

[0004] Although the clamping structure disclosed in patent application No. 2018110295712 can play a fixing role, its structure has the following technical problems: ① The workpiece clamping mandrel structure is complex and the manufacturing cost is high; ② The workpiece fixing seat and the quick clamp horizontal clamp cooperate to clamp and fix the neck of the workpiece. Due to the heavy weight of the workpiece, the quick clamp horizontal clamp cannot effectively fix the workpiece firmly during the rotation process, thereby affecting the processing effect of milling the arc surface. At the same time, the quick clamp horizontal clamp is a pneumatic clamp with a high failure rate.

[0005] Based on the above technical problems, the inventor proposes a positioning device for connecting rod processing, which has a simplified structure, good fixing and positioning effects, and extremely low failure rate. Utility Model Content

[0006] The utility model aims at solving the deficiencies of the prior art and provides a positioning device for connecting rod processing.

[0007] The utility model is realized through the following technical scheme, and provides a positioning device for connecting rod processing, comprising a mounting plate installed on the output transmission shaft of the gearbox of a lathe, a fixing seat installed at the center position of the mounting plate, a core shaft installed on the fixing seat, and a first screw rod installed at the end of the core shaft; a counterweight and a bracket are installed on the mounting plate, the counterweight and the bracket are respectively arranged on both sides of the core shaft, a connecting sleeve of the connecting rod is sleeved on the core shaft and fixed by a limit piece installed on the first screw rod, and a connecting disk of the connecting rod is lifted and fixed by the bracket; the distance between the bracket and the core shaft is adjustable, and the bracket is connected to the mounting plate through an adjusting mechanism.

[0008] Preferably, the adjustment mechanism comprises a fixing plate, the upper end of which is connected to the mounting plate via bolts, two mounting seats are vertically fixed to the fixing plate, and a second screw rod is connected between the two mounting seats.

[0009] Preferably, the bracket includes a bracket and a connecting plate vertically fixed to the bracket, two ear plates are vertically fixed to the connecting plate, a second screw rod passes through each ear plate, an upper fixing nut and a lower fixing nut are threadedly connected to the second screw rod, and the two ear plates are located between the upper fixing nut and the lower fixing nut. By adjusting the positions of the upper fixing nut and the lower fixing nut, the spacing between the bracket and the core shaft can be adjusted accordingly to adapt to connecting rods of different lengths.

[0010] Preferably, a mounting hole is provided on the support plate, and the support plate and the connecting plate are connected by bolts and then fixed by nuts.

[0011] Preferably, the gearbox output drive shaft, the core shaft and the first screw are coaxial.

[0012] Preferably, the counterweight and the mounting plate are connected through bolts and then fixed through nuts.

[0013] Preferably, the limiting member comprises a limiting ring and a fastening nut, the limiting ring is sleeved on the first screw rod, and the fastening nut is threadedly connected to the first screw rod and presses the limiting ring onto the connecting sleeve.

[0014] Preferably, the connecting sleeve of the connecting rod is clearance-matched with the core shaft.

[0015] The beneficial effects of the utility model are:

[0016] The present application fixes the upper part of the connecting rod by the cooperation of the mandrel and the stopper, and fixes the lower part of the connecting rod by the bracket. The bracket has a simple structure, is firmly fixed, and has a very low failure rate. The connecting rod will not be unreliably fixed during rotation, ensuring the processing effect of milling the arc surface. At the same time, the improved mandrel can be replaced according to the needs of use, the mandrel has a simple structure, and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 2 This is a front view of the utility model in use;

[0019] As shown in the figure:

[0020] 1. Gearbox output drive shaft, 2. Mounting plate, 3. Counterweight, 4. Fixed seat, 5. Mandrel, 6. First screw, 7. Fixed plate, 8. Second screw, 9. Ear plate, 10. Upper fixing nut, 11. Lower fixing nut, 12. Connecting plate, 13. Support plate, 14. Mounting seat, 15. Connecting sleeve, 16. Connecting plate, 17. Limiting ring, 18. Fastening nut. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0022] like Figure 1 , 2 As shown, the utility model includes a mounting plate 2 mounted on the output transmission shaft 1 of the gearbox of the lathe, a fixing seat 4 is mounted at the center of the mounting plate 2, a mandrel 5 is mounted on the fixing seat 4, and a first screw 6 is mounted at the end of the mandrel 5. A counterweight 3 and a bracket are mounted on the mounting plate 2, the counterweight 3 and the bracket are respectively arranged on both sides of the mandrel 5, a connecting sleeve 15 of the connecting rod is sleeved on the mandrel 5 and fixed by a stopper mounted on the first screw 6, and a connecting plate 16 of the connecting rod is lifted and fixed by the bracket. The distance between the bracket and the mandrel 5 is adjustable, and the bracket is connected to the mounting plate 2 through an adjustment mechanism.

[0023] In this embodiment, the adjustment mechanism includes a fixing plate 7, the upper end of which is connected to the mounting plate 2 by bolts, two mounting seats 14 are vertically fixed on the fixing plate 7, and a second screw rod 8 is connected between the two mounting seats 14. The bracket includes a support plate 13 and a connecting plate 12 vertically fixed to the support plate 13, two ear plates 9 are vertically fixed on the connecting plate 12, the second screw rod 8 passes through each ear plate 9, an upper fixing nut 10 and a lower fixing nut 11 are threadedly connected on the second screw rod 8, and the two ear plates 9 are located between the upper fixing nut 10 and the lower fixing nut 11. By adjusting the positions of the upper fixing nut 10 and the lower fixing nut 11 in coordination, the spacing between the bracket and the core shaft 5 can be adjusted accordingly to adapt to connecting rods of different lengths.

[0024] In this embodiment, a mounting hole is provided on the support plate 13, and the support plate 13 and the connecting plate 16 are connected by bolts and then fixed by nuts.

[0025] In this embodiment, the gearbox output transmission shaft 1, the core shaft 5 and the first screw 6 are coaxial.

[0026] In this embodiment, the counterweight 3 and the mounting plate 2 are connected through bolts and then fixed through nuts.

[0027] In this embodiment, the fixing seat 4 is connected to the mounting plate 2 by bolts. The fixing seat 4 can be disassembled and replaced with a core shaft 5 of different diameters according to different types of connecting rods.

[0028] In this embodiment, the limiting member includes a limiting ring 17 and a fastening nut 18 . The limiting ring 17 is sleeved on the first screw rod 6 . The fastening nut 18 is threadedly connected to the first screw rod 6 and presses the limiting ring 17 onto the connecting sleeve 15 .

[0029] In this embodiment, the connecting sleeve 15 of the connecting rod is clearance-fitted with the core shaft 5 .

[0030] Before processing the connecting rod, the connecting sleeve 15 is first sleeved on the core shaft 5, the connecting plate 16 of the connecting rod is lifted and fixed by the bracket, and finally the connecting sleeve 15 is fixed by the limiter. After the fixing is completed, the output transmission shaft of the gearbox drives the connecting rod to swing back and forth, and the arc surface is milled by the milling cutter.

[0031] The present application fixes the upper part of the connecting rod by the cooperation of the mandrel 5 and the stopper, and fixes the lower part of the connecting rod by the bracket. The bracket has a simple structure, is firmly fixed, and has a very low failure rate. The connecting rod will not be unreliably fixed during rotation, ensuring the processing effect of milling the arc surface. At the same time, the improved mandrel 5 can be replaced according to the use needs. The mandrel 5 has a simple structure and low manufacturing cost.

[0032] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A positioning device for connecting rod processing, characterized in that: It includes a mounting plate installed on the output drive shaft of the gearbox of the lathe, a fixing seat installed at the center position of the mounting plate, a core shaft installed on the fixing seat, and a first screw rod installed at the end of the core shaft; a counterweight and a bracket are installed on the mounting plate, the counterweight and the bracket are respectively arranged on both sides of the core shaft, a connecting sleeve of the connecting rod is sleeved on the core shaft and fixed by a limit piece installed on the first screw rod, and a connecting disk of the connecting rod is lifted and fixed by the bracket; the distance between the bracket and the core shaft is adjustable, and the bracket is connected to the mounting plate through an adjusting mechanism.

2. A positioning device for connecting rod processing according to claim 1, characterized in that: The adjustment mechanism comprises a fixing plate, the upper end of which is connected to the mounting plate via bolts, two mounting seats are vertically fixed to the fixing plate, and a second screw rod is connected between the two mounting seats.

3. A positioning device for connecting rod processing according to claim 2, characterized in that: The bracket includes a support plate and a connecting plate vertically fixed to the support plate, two ear plates are vertically fixed to the connecting plate, a second screw rod passes through each ear plate, an upper fixing nut and a lower fixing nut are threadedly connected to the second screw rod, and the two ear plates are located between the upper fixing nut and the lower fixing nut.

4. A positioning device for connecting rod processing according to claim 3, characterized in that: The support plate is provided with a mounting hole, and the support plate and the connecting plate are connected through bolts and then fixed through nuts.

5. A positioning device for connecting rod processing according to claim 1, characterized in that: The output transmission shaft of the gearbox, the core shaft and the first screw are coaxial.

6. A positioning device for connecting rod processing according to claim 1, characterized in that: The counterweight and the mounting plate are connected through bolts and then fixed through nuts.

7. A positioning device for connecting rod processing according to claim 1, characterized in that: The limiting member comprises a limiting ring and a fastening nut. The limiting ring is sleeved on the first screw rod. The fastening nut is threadedly connected with the first screw rod and presses the limiting ring onto the connecting sleeve.

8. A positioning device for connecting rod processing according to claim 1, characterized in that: The connecting sleeve of the connecting rod is clearance-matched with the core shaft.

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