Quick clamping tool for shaft parts

Abstract

The utility model relates to the technical field of shaft part clamping devices, in particular to a shaft part rapid clamping tool which comprises a tool body and a connecting mechanism. An opening is formed in the tool body, and a pair of fastening bosses are fixedly connected to the opening; the clamping mechanisms are symmetrically arranged on the two sides of the fastening boss; the clamping mechanism comprises a supporting rod fixed to the workbench, a rotating shaft is fixed to the supporting rod and rotationally connected with a cam, a connecting rod is fixed to the small end of the cam, the rotating shaft is sleeved with a torsional spring, and the two ends of the torsional spring are fixed to the supporting rod and the cam respectively. The end, away from the cam, of the connecting rod is slidably connected with a bolt, the rod portion of the bolt is sleeved with a compression spring, the end, away from the compression spring, of the bolt is in threaded connection with a check block, and two protrusions are symmetrically fixed to the check block. A threaded hole is formed in the workbench, a positioning sleeve is in threaded connection with the interior of the threaded hole, and the positioning sleeve is used for locking and limiting the plug pin. By means of the tool, shaft parts can be rapidly clamped, and the clamping efficiency of the parts is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft part clamping devices, in particular to a shaft part quick clamping tool. Background Art

[0002] As the global demand for renewable energy grows, wind power generation has received widespread attention as a clean and renewable form of energy. Wind turbines use wind energy to drive the blades to rotate, and then increase the speed through the gearbox, converting the low-speed rotation into the high-speed rotation required by the generator, thereby generating electricity. In this process, the output shaft of the wind turbine gearbox plays a vital role. As the core component of the wind turbine gearbox, it not only needs to withstand huge torque and impact force, but also ensure efficient and stable energy transmission. Therefore, the design and manufacturing technology of large wind turbine shaft gears has an important impact on the performance, reliability and service life of wind power generation equipment.

[0003] The output shaft of the wind turbine gearbox is a large, high-precision shaft part. During grinding, a double-top clamping method is usually used, that is, two tops are used to hold the middle holes on both end faces of the shaft, and then a driving fixture is configured to connect the workbench and the outer circle of the shaft, so that the workbench rotates to drive the parts to rotate, so that the outer circle of the workpiece can be ground and formed by the grinding wheel. For example, in the prior art "A positioning fixture and gear grinder for shafts" (publication number: CN212704807U), the annular fixture is fixed to the machine tool workbench, and then multiple clamping shafts are passed through the threaded holes on the fixture, and the end faces of the clamping shafts are used to radially press against the outer cylindrical surface of the shaft parts. When the workbench rotates, the parts are driven to rotate by the clamping force of the end faces of the clamping shafts on the outer cylindrical surface of the shaft parts. This prior art has the following technical problems:

[0004] The clamping shaft and the tooling in the prior art are connected by threads. After the clamping shaft is tightened, the outer cylindrical surface of the shaft part is pressed against the end of the clamping shaft to drive the part to rotate circumferentially. There are multiple clamping shafts along the circumferential direction. Each time the part is fixed, each clamping shaft needs to be tightened in turn to complete the fixation. Not only is the operation process complicated and time-consuming, but the tightening force of multiple clamping shafts is difficult to control, which can easily damage the outer cylindrical surface of the part and cause the part to be scrapped. Utility Model Content

[0005] The utility model provides a quick clamping tool for shaft parts, which can solve the problem that the shaft positioning tool in the prior art is complicated to operate and easy to damage the outer cylindrical surface of the part, which eventually leads to the scrapping of the part.

[0006] The present application provides the following technical solution: a quick clamping tool for shaft parts, comprising an annular tool body and a connecting mechanism for fixing the tool body on a machine tool workbench; the tool body is provided with an opening, and a pair of fastening bosses are fixedly connected to the opening;

[0007] It also includes a clamping mechanism fixed on the workbench, the clamping mechanism includes a cam and a pin detachably connected to the workbench, a connecting rod is fixed to the small head end of the cam, the cam can swing relative to the fastening boss, and the pin is used to unlock the swinging state of the cam; when the connecting rod swings to be parallel to the upper surface of the workbench, the tooling body is locked.

[0008] Beneficial effect: When the connecting rod swings to be parallel to the upper surface of the workbench, the tool body is locked. At this time, the shaft parts in the tool body are clamped, and the connecting rod is prevented from swinging by the pin. Not only can the shaft parts be locked quickly and the clamping efficiency is improved, but also when the workbench rotates, the rotational force drives the shaft parts to rotate synchronously through the connecting rod, cam and tool body. The shaft parts are clamped by the tool body, which can avoid the problem of the tool damaging the workpiece surface.

[0009] Furthermore, the clamping mechanism is symmetrically arranged on both sides of the fastening boss; the clamping mechanism also includes a support rod fixed on the workbench, a rotating shaft is fixed on the support rod, a cam is rotatably connected to the rotating shaft, a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively fixed to the support rod and the cam;

[0010] The rod of the latch is sleeved with a compression spring, and one end of the latch away from the compression spring is threadedly connected with a stopper, on which two protrusions are symmetrically fixed;

[0011] The workbench is provided with a threaded hole, a positioning sleeve is threadedly connected to the threaded hole, and the positioning sleeve is used to lock and limit the latch.

[0012] Beneficial effects:

[0013] 1. By pressing the connecting rod to make it swing to a horizontal state, the big end of the cam forms an extrusion force on the fastening boss, so that the tooling body clamps the outer cylindrical surface of the shaft part, and then locks the pin through the positioning sleeve, so as to quickly complete the clamping operation of the part; effectively improve the clamping efficiency of the parts;

[0014] 2. After the latch is locked by the locating sleeve, the rotational force of the torsion spring on the connecting rod forms a balance with the elastic force of the compression spring on the connecting rod when the latch is locked, which can ensure that the tooling body will not become loose when the workbench rotates, thereby ensuring the stability of the clamping.

[0015] 3. Since the cam applies extrusion pressure to the tooling body, the outer cylindrical surface of the part will not be damaged during the entire process, effectively avoiding quality problems of the parts caused by clamping operations.

[0016] Furthermore, a sliding hole is provided at the center of the positioning sleeve, and two sliding grooves are symmetrically provided on the sliding hole. The stopper can slide in the sliding hole, and the protrusion can slide in the sliding groove.

[0017] Beneficial effect: the stopper at the bottom of the latch can be inserted along the sliding hole on the positioning sleeve. When the stopper slides out from the end surface of the bottom of the positioning sleeve, the latch is rotated so that the protrusion on the stopper can be offset from the sliding groove on the positioning sleeve, and the latch is limited by the positioning sleeve, thereby realizing rapid locking of the connecting rod and the latch.

[0018] Furthermore, a liner is provided in the inner hole of the tool body, and the liner is provided with an opening.

[0019] Beneficial effect: The opening of the bushing can make it easier for the bushing to be sleeved on the outer cylindrical surface of the part during clamping, which not only protects the part, but also allows bushings of different sizes to be replaced to accommodate shaft parts of various diameters.

[0020] Furthermore, two connecting bosses are fixed on the tool body, and the connecting bosses are located on the opposite sides of the fastening boss.

[0021] Beneficial effect: The connecting boss is used to connect the tool body with the connecting mechanism, so that when the machine tool worktable rotates, the tool body can be driven to rotate through the connecting mechanism.

[0022] Furthermore, the connecting mechanism includes a first mounting block fixed on the machine tool workbench, a second mounting block is fixed on the first mounting block, the second mounting block is located between two connecting bosses, and a locking screw is threadedly connected to the connecting boss, and the end of the locking screw faces the two side walls of the second mounting block.

[0023] Beneficial effect: When the workbench rotates, the first mounting block and the second mounting block are driven to rotate synchronously. The second mounting block can drive the tightening screw to drive the tooling body to rotate with the workbench, and then the tooling body drives the entire part to rotate, which is convenient for the part to complete the grinding process.

[0024] Furthermore, the clamping mechanism also includes a fixed block and a baffle plate fixed on the workbench, the fixed block and the baffle plate are arranged opposite to each other, a round hole is opened on the baffle plate, the pin can slide in the round hole of the baffle plate, the rod portion of the pin is provided with a baffle plate integrally formed with the rod portion, the rod portion of the pin between the baffle plate and the baffle plate is sleeved with a compression spring, the small head end of the cam is rotatably connected to a cam connecting rod, both ends of the cam connecting rod are rotatably connected to the fastening boss, and a rubber layer is fixed to the outer cylindrical surface of the large head end of the cam.

[0025] Beneficial effect: When the connecting rod swings to a horizontal state, the big head end of the cam can press against the surface of the shaft parts, and the elastic force of the compression spring causes the pin to press the connecting rod against the fixed block. When the workbench rotates, the connecting rod, cam and tooling body can drive the shaft parts to rotate synchronously, which is convenient for the parts to complete the grinding process. At the same time, the rubber layer fixed at the big head end of the cam can reduce friction and prevent scratches on the workpiece surface when the cam swings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the front view of the utility model.

[0027] Figure 2 for Figure 1 Top view of the .

[0028] Figure 3 for Figure 2 The front view of the tooling body.

[0029] Figure 4 for Figure 1 Top view of the center positioning sleeve.

[0030] Figure 5 for Figure 1 Top view of the center stop.

[0031] Figure 6 It is the front view of the second embodiment.

[0032] Figure 7 for Figure 6 Sectional view of AA. DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] The marks in the drawings of the specification include: workbench 1, threaded hole 101, bushing 2, tooling body 3, connecting boss 31, fastening boss 32, tightening screw 4, second mounting block 5, locking screw 6, first mounting block 7, support rod 8, torsion spring 9, latch 10, connecting rod 11, rotating shaft 12, cam 13, compression spring 14, positioning sleeve 15, sliding hole 151, stopper 16, threaded column 161.

[0035] Embodiment 1

[0036] like Figures 1 to 5 As shown, a quick clamping tool for shaft parts includes an annular tool body 3, a connecting mechanism for fixing the tool body 3 on a machine tool workbench 1, and a clamping mechanism fixed on the machine tool workbench 1.

[0037] like Figure 3 As shown, an opening is provided on the tool body 3, and two integrally formed fastening bosses 32 are provided at the opening. Two connecting bosses 31 integrally formed on the tool body 3 are provided on the opposite sides of the fastening bosses 32; a liner 2 is provided in the inner hole of the tool body 3, and the liner 2 has an opening.

[0038] like Figure 2As shown, the connecting mechanism includes a first mounting block 7, which is connected to the machine tool workbench 1 through a locking screw 6. The end of the first mounting block 7 away from the locking screw 6 is screwed to the second mounting block 5. The second mounting block 5 is vertically located between the two connecting bosses 31. Two locking screws 4 are respectively threadedly connected to the two connecting bosses 31. The end portions of the two locking screws 4 pass through the outer sides of the two connecting bosses 31 and then lock against the two side walls of the second mounting block 5. When the workbench 1 rotates, the second mounting block 5 can drive the locking screws 4 to drive the tooling body 3 to follow the rotation, thereby driving the shaft parts in the bushing 2 to rotate together.

[0039] like Figure 1 As shown, the clamping mechanism is symmetrically arranged on both sides of the fastening boss 32, and the clamping mechanism includes a support rod 8 threadedly connected to the workbench 1, a rotating shaft 12 is fixed on the support rod 8, a cam 13 is rotatably connected to the rotating shaft 12, a small end of the cam 13 is fixed to an integrally formed connecting rod 11, and a sleeve as shown in FIG. Figure 2 The torsion spring 9 shown is located on the rod portion of the rotating shaft 12 between the cam 13 and the support rod 8, and the two ends of the torsion spring 9 are respectively fixed to the end surfaces of the support rod 8 and the cam 13;

[0040] like Figure 1 As shown, a circular hole is vertically opened at one end of the connecting rod 11 away from the cam 13, and a latch 10 is slidably connected in the circular hole. The end diameter of the latch 10 is larger than the rod diameter. A compression spring 14 is sleeved on the rod of the latch 10. The compression spring 14 is located between the large end of the latch 10 and the connecting rod 11. A stopper 16 is provided at one end of the latch 10 away from the compression spring 14. The top view of the stopper 16 is as shown in FIG. Figure 5 As shown, two protrusions are symmetrically fixed on the stopper 16, and a section of an integrally formed threaded column 161 is provided at the center of the stopper 16, and the threaded column 161 is convenient for threading the stopper 16 to be connected to the Figure 1 The bottom of the middle latch 10;

[0041] like Figure 1 As shown, the workbench 1 is also provided with a threaded hole 101, and a positioning sleeve 15 is connected to the inner thread of the threaded hole 101. After the positioning sleeve 15 is tightened, the distance between the bottom of the threaded hole 101 and the bottom surface of the positioning sleeve 15 is greater than the thickness of the two protrusions on the stopper 16. Figure 4 As shown, a sliding hole 151 is provided at the center of the positioning sleeve 15 , and two sliding grooves are symmetrically provided on the sliding hole 151 , and the stopper 16 can slide in the sliding hole 151 , and the protrusion on the stopper 16 can slide in the sliding groove.

[0042] The method of using the tool is as follows: after positioning the upper and lower machine tool centers of the shaft-like parts, the tool body 3 is sleeved on the outer cylindrical surface of the part, and the bushing 2 of appropriate size can be selected according to the size of the part, and then the connecting rod 11 is pressed to swing it from a vertical state to a horizontal state, and the large head end of the cam 13 forms an extrusion force on both sides of the fastening boss 32, so that the tool body 3 clamps the outer cylindrical surface of the shaft-like parts, and then the pin 10 is inserted into the positioning sleeve 15. After the stopper 16 slides out from the end face at the bottom of the positioning sleeve 15 and enters the threaded hole 101, the pin 10 is rotated so that the protrusion on the stopper 16 can be offset from the slide groove on the positioning sleeve 15, so that the positioning sleeve 15 locks the pin 10 to quickly complete the clamping operation of the part.

[0043] Embodiment 2

[0044] like Figure 6 and Figure 7 As shown, the difference between this embodiment and the first embodiment is that the first mounting block 7, the second mounting block 5, the connecting boss 31 and the fastening screw 4 on the tool body 3 are eliminated in this embodiment; Figure 6 As shown, the clamping mechanism includes a fixed block 17 and a baffle 18 fixed on the workbench 1, the fixed block 17 and the baffle 18 are arranged opposite to each other, a round hole is opened on the baffle 18, the latch 10 is inserted into the round hole of the baffle 18, and the latch 10 can slide in the round hole of the baffle 18, the rod of the latch 10 is provided with a baffle 101 integrally formed with the rod, and the compression spring 14 is sleeved on the rod of the latch 10 between the baffle 101 and the baffle 18.

[0045] The small end of the cam 13 is pivotally connected between the two fastening bosses 32 through a cam connecting rod 19 , and a rubber layer is fixed on the outer circumference of the large end of the cam 13 .

[0046] When using, Figure 6 As shown, hold the tail of the latch 10 and pull the latch 10 to slide the latch 10 away from the fixing block 17, and then move the connecting rod 11 to the position as shown in FIG. Figure 7 In the horizontal state shown, the large end of the cam 13 is pressed against the outer cylindrical surface of the workpiece 20 (the workpiece 20 is pressed tightly by the upper and lower double centers of the machine tool. Figure 7 The center top is omitted and not drawn), then the latch 10 is loosened, and the blocking piece 101 is driven by the elastic force of the compression spring 14 so that the end of the latch 10 presses the connecting rod 11 against the fixed block. When the workbench 1 rotates, the fixed block 17 and the latch 10 drive the connecting rod 11 to rotate, and then the workpiece 20 is driven to rotate by the pressing force of the cam 13 on the outer cylindrical surface of the workpiece.

[0047] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A quick clamping tool for shaft parts, comprising an annular tool body and a connecting mechanism for fixing the tool body on a machine tool workbench; the tool body is provided with an opening, a pair of fastening bosses are fixedly connected to the opening, and the characteristics are: It also includes a clamping mechanism fixed on the workbench, the clamping mechanism includes a cam and a latch detachably connected to the workbench, a connecting rod is fixed to the small end of the cam, the cam can swing relative to the fastening boss, and the latch is used to unlock the swinging state of the cam; When the connecting rod swings to be parallel to the upper surface of the workbench, the tooling body is locked.

2. The quick clamping tool for shaft parts according to claim 1 is characterized in that: The clamping mechanism is symmetrically arranged on both sides of the fastening boss; the clamping mechanism also includes a support rod fixed on the workbench, a rotating shaft is fixed on the support rod, a cam is rotatably connected to the rotating shaft, a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively fixed to the support rod and the cam; The rod of the latch is sleeved with a compression spring, and one end of the latch away from the compression spring is threadedly connected with a stopper, on which two protrusions are symmetrically fixed; The workbench is provided with a threaded hole, a positioning sleeve is threadedly connected to the threaded hole, and the positioning sleeve is used to lock and limit the latch.

3. A quick clamping tool for shaft parts according to claim 2, characterized in that: A sliding hole is provided at the center of the positioning sleeve, and two sliding grooves are symmetrically provided on the sliding hole. The stopper can slide in the sliding hole, and the protrusion can slide in the sliding groove.

4. The quick clamping tool for shaft parts according to claim 3 is characterized in that: A lining ring is arranged in the inner hole of the tool body, and the lining ring is provided with an opening.

5. The quick clamping tool for shaft parts according to claim 4 is characterized in that: Two connecting bosses are also fixed on the tool body, and the connecting bosses are located on the opposite sides of the fastening boss.

6. The quick clamping tool for shaft parts according to claim 5, characterized in that: The connecting mechanism includes a first mounting block fixed on the machine tool workbench, a second mounting block fixed on the first mounting block, the second mounting block is located between two connecting bosses, and a locking screw is threadedly connected to the connecting boss, and the end of the locking screw faces the two side walls of the second mounting block.

7. The quick clamping tool for shaft parts according to claim 1, characterized in that: The clamping mechanism also includes a fixed block and a baffle plate fixed on the workbench, the fixed block and the baffle plate are arranged opposite to each other, a round hole is opened on the baffle plate, the latch pin can slide in the round hole of the baffle plate, a baffle plate integrally formed with the rod portion is provided on the rod portion of the latch pin, a compression spring is sleeved on the rod portion of the latch pin between the baffle plate and the baffle plate, the small head end of the cam is rotatably connected to a cam connecting rod, both ends of the cam connecting rod are rotatably connected to the fastening boss, and a rubber layer is fixed to the outer cylindrical surface of the large head end of the cam.

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