Clamping device for gear production

Abstract

The utility model discloses a clamping device for gear production, including fixed base, main shaft sleeve, chuck holder and chuck connecting piece, chuck holder one end is connected with main shaft sleeve, and the other end is provided with second mounting hole, chuck connecting piece is equipped with the clamping part, and it is provided with the jack hole for inserting the shaft workpiece, and the clamping part is the split -part structure of the outer surface cone surface, and is equipped with at least two open grooves of intercommunication jack hole along the axial direction, and main shaft sleeve is equipped with first drive module, is used for driving chuck connecting piece to slide in second mounting hole, when chuck connecting piece moves towards second mounting hole, and second mounting hole orifice and clamping part cone surface are in abutment, force clamping part radial contraction to clamp workpiece, and reverse movement then clamping part radial loosens, and the device controls clamping part radial deformation through drive module, realizes the quick automatic clamping to different size shaft workpiece, and effectively improves clamping efficiency and production adaptability.

Description

Technical Field

[0001] This utility model belongs to the field of gear processing technology, and specifically relates to a clamping device for gear production. Background Technology

[0002] When machining shafts by gear hobbing, the workpiece usually needs to be fixed on the gear hobbing machine by a clamping device to ensure sufficient rigidity and rotational accuracy during the gear machining process. Currently, three-jaw chucks or five-jaw chucks are widely used as standard fixtures in this field. During clamping, the operator needs to insert the workpiece shaft into the chuck and drive the jaws to move radially by tightening the circumferentially distributed threaded parts one by one to achieve locking and centering of the workpiece.

[0003] However, in the actual mass production of gear hobbing on shafts, it is often necessary to deal with gear shaft parts of various diameters. Whenever the workpiece size is changed, the position of the chuck must be readjusted and a new round of locking and positioning operations must be performed. This process is not only repetitive and time-consuming, but also greatly increases the labor intensity of operators, resulting in low overall clamping efficiency and difficulty in meeting the high-efficiency and flexible processing requirements of modern production. Summary of the Invention

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a clamping device for gear production that can solve the aforementioned problems.

[0005] A clamping device for gear manufacturing includes a fixed base, a spindle sleeve, a chuck seat, and a chuck connector. The fixed base has a hollow internal structure and a first mounting hole. One end of the spindle sleeve is inserted into the interior of the fixed base through the first mounting hole, and the other end of the spindle sleeve is connected to one end of the chuck seat. The other end of the chuck seat has a second mounting hole for inserting the chuck connector. The outer opening of the second mounting hole is chamfered or rounded. The chuck connector has a clamping part with an insertion hole for inserting a shaft-like workpiece to be processed. The clamping part has at least two opening slots along the axial direction, which connect to the insertion hole, making the clamping part a segmented structure. The outer surface of the clamping part is a conical surface. The spindle sleeve has a first drive module for driving the chuck connector to slide at the second mounting hole. When the chuck connector slides toward the second mounting hole, the outer opening of the second mounting hole abuts against the conical surface, and the clamping part radially contracts to clamp the shaft-like workpiece to be processed.

[0006] As a further embodiment of this utility model: the first drive module includes a drive shaft, a rotary motor, a connecting shaft, and a pushing device. The drive shaft is rotatably mounted inside the spindle sleeve. The fixed seat has a third mounting hole. The rotary motor is mounted at the opening of the third mounting hole. The output end of the rotary motor is connected to one end of the drive shaft to drive the drive shaft to rotate. The other end of the drive shaft has a first adjustment hole. The end of the chuck seat near the drive shaft extends into an insertion part for insertion into the first adjustment hole. The outer surface of the drive shaft has an adjustment through hole radially. The bottom of the first adjustment hole has a second adjustment hole for connecting the adjustment through hole. The connecting shaft is slidably mounted inside the first adjustment hole. One end of the connecting shaft extends out from the second adjustment hole. One end of the connecting shaft has a locking block. The insertion part has a fourth mounting hole for connecting the second mounting hole. The other end of the connecting shaft is inserted into the fourth mounting hole for connecting one end of the chuck connector. The pushing device is set inside the fixed seat to push the locking block to slide in the adjustment through hole.

[0007] As a further embodiment of this utility model: the pushing device includes a thrust bearing, a rotating washer, a piston, and an oil cover. The thrust bearing is sleeved on the outer shaft surface of one end of the drive shaft, the rotating washer is sleeved on the drive shaft, and the rotating washer is located between the retaining block and the thrust bearing. The piston has a sleeve hole for sleeved on the drive shaft, and the piston has a first abutting part for abutting against the side of the thrust bearing away from the rotating washer. The oil cover has two outer annular grooves, and the fixed seat has an annular mounting groove inside for mounting the oil cover. The outer annular grooves abut against the groove surface of the annular mounting groove to form an annular seal. The space has an inner ring groove in the oil cover. The outer surface of the piston abuts against the inner ring groove to seal it. The piston has an annular protrusion. The edge of the annular protrusion abuts against the inner ring groove to divide the inner ring groove into a first annular sealing area and a second annular sealing area. The end face of the fixed seat near the outer ring groove has an oil injection hole to connect to the outer ring groove. The surface of one outer ring groove near the first annular sealing area has a first guide hole to connect to the first annular sealing area. The surface of the other outer ring groove near the second annular sealing area has a second guide hole to connect to the second annular sealing area.

[0008] As a further embodiment of this utility model: an elastic element is provided between the connecting shaft and the first adjusting hole, and the connecting shaft is provided with a second abutting part, the second abutting part and the insertion part forming a buffer space for installing the elastic element.

[0009] As a further embodiment of this utility model: the outer opening of the second mounting hole is expanded outward to form a flared hole.

[0010] As a further embodiment of this utility model: the insertion part and the first adjustment hole are interference fit.

[0011] As a further embodiment of this utility model: the pushing device also includes at least two first sealing rings, and at least two first annular grooves are provided on the surface of the oil hood near the outer annular groove. The two first sealing rings are respectively fitted into the first annular grooves to enhance the sealing performance between the oil hood and the annular mounting groove.

[0012] As a further embodiment of this utility model: the two outer annular grooves divide the surface of the oil passage cover into a first annular surface, a second annular surface, and a third annular surface. The pushing device includes three first sealing rings. The oil passage cover is provided with three first annular grooves. The three first annular grooves are located on the first annular surface, the second annular surface, and the third annular surface, respectively. Each first annular groove is fitted with a first sealing ring to enhance the sealing between the surface of the oil passage cover and the annular mounting groove.

[0013] As a further embodiment of this utility model: the inner ring groove divides the inner surface of the oil passage cover into a first inner ring surface and a second inner ring surface. The pushing device also includes two second sealing rings. The oil passage cover is provided with two second annular grooves, which are located on the first inner ring surface and the second inner ring surface, respectively. Each second annular groove is provided with a second sealing ring to enhance the sealing between the inner surface of the oil passage cover and the outer surface of the piston.

[0014] As a further embodiment of this utility model: a third annular groove is provided on the outer surface of the annular protrusion, and the pushing device also includes a third sealing ring. The third sealing ring is fitted into the third annular groove to enhance the sealing between the outer surface of the annular protrusion and the inner annular groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by setting a clamping device, the shaft part to be processed is inserted into the insertion hole, and the first driving module drives the chuck connector to slide in the second mounting hole, thereby changing the size of the insertion hole of the clamping part, so as to realize the clamping or loosening of the workpiece. It can adapt to shaft workpieces of different sizes more quickly, without manual operation, improving clamping efficiency and better meeting production needs.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a side view of the clamping device in this utility model.

[0019] Figure 2 yes Figure 1 A cross-sectional view of section AA.

[0020] Figure 3 yes Figure 2 A magnified view of a portion of point c.

[0021] Figure 4 yes Figure 1 A cross-sectional view of section BB.

[0022] Figure 5 A cross-sectional view of the oil sump in this utility model.

[0023] Figure 6 An exploded view of the drive shaft and piston in the utility model.

[0024] Figure 7 A schematic diagram of the structure of the oil hood in the utility model.

[0025] Figure 8 A schematic diagram of the structure of the clamp seat in the utility model.

[0026] Figure 9 A schematic diagram of the structure of the clamp connector in the utility model.

[0027] In the diagram: 1. Fixed base; 11. First mounting hole; 12. Third mounting hole; 13. Annular mounting groove; 14. Oil injection hole; 2. Spindle sleeve; 3. Chuck seat; 31. Second mounting hole; 32. Insertion part; 321. Fourth mounting hole; 4. Chuck connector; 41. Clamping part; 411. Insertion hole; 412. Opening groove; 211. Drive shaft; 2111. First adjustment hole; 2112. Adjustment through hole; 2113. Second adjustment hole; 212. Rotary motor; 213. Connecting shaft; 2131. Locking block; 2132. Second abutment part; 215. Elastic element; 216. Buffer space; 2141, Thrust bearing; 2142, Rotary washer; 2143, Piston; 21431, Sleeve hole; 21432, First abutment part; 21433, Annular protrusion; 214331, Third annular groove; 2144, Oil cover; 21441, Outer annular groove; 214411, First guide hole; 214412, Second guide hole; 21442, Inner annular groove; 21442a, First annular sealing area; 21442b, Second annular sealing area; 21443, First annular groove; 21444, First annular surface; 21445, Second annular surface; 21446, Third annular surface; 21447, First inner annular surface; 21448, Second inner annular surface; 21449, Second annular groove; 2145, First sealing ring; 2146, Second sealing ring; 2147, Third sealing ring. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0032] Please see Figures 1-3 and Figures 8-9 In this embodiment of the present invention, a clamping device for gear production includes a fixed base 1, a spindle sleeve 2, a chuck seat 3, and a chuck connector 4. The fixed base 1 has an internally hollow structure and a first mounting hole 11. One end of the spindle sleeve 2 is inserted into the interior of the fixed base 1 through the first mounting hole 11, and the other end of the spindle sleeve 2 is connected to one end of the chuck seat 3. The other end of the chuck seat 3 has a second mounting hole 31 for inserting the chuck connector 4. The outer opening of the second mounting hole 31 is chamfered or rounded. The chuck connector 4 has a clamping part 41, and the clamping part 41 has an insertion hole 411 for inserting the shaft workpiece to be processed. The clamping part 41 has at least two opening slots 412 along the axial direction. The opening slots 412 are connected to the insertion holes 411, making the clamping part 41 a segmented structure, preferably a three-segment structure. The outer surface of the clamping part 41 is a conical surface. The spindle sleeve 2 is provided with a first drive module for driving the chuck connector 4 to slide at the second mounting hole 31. When the chuck connector 4 slides toward the second mounting hole 31, the outer opening of the second mounting hole 31 abuts against the conical surface, and the clamping part 41 retracts radially to clamp the shaft workpiece to be processed.

[0033] Specifically, the connection between the spindle sleeve 2 and the fixed base 1 includes, but is not limited to, threaded connection and snap-fit ​​connection. The outer surface of the clamping part 41 is conical. In this embodiment, the clamping part 41 is formed into a cone shape. The shaft diameter of the outer surface of the clamping part 41 gradually decreases towards the second mounting hole 31. The length of the opening groove 412 extends to the conical surface of the clamping part 41. When the clamping part 41 moves towards the second mounting hole 31 (that is, towards the inside of the chuck 3), as the right edge of the second mounting hole 31 contacts the conical surface of the clamping part 41 and applies radial extrusion force to the clamping part 41, the clamping part 41 gradually contracts radially, causing the insertion hole 411 to shrink. The inner side of the insertion hole 411 gradually clamps the shaft workpiece inserted into the insertion hole 411, thereby completing the clamping of the shaft workpiece. In this embodiment, the output end of the rotary motor 212 can be connected to the drive shaft 211 by setting a coupling to achieve the effect of the rotary motor 212 driving the drive shaft 211 to rotate.

[0034] Further as Figures 1-2 In this embodiment of the invention, the first drive module includes a drive shaft 211, a rotary motor 212, a connecting shaft 213, and a pushing device. The drive shaft 211 is rotatably mounted inside the spindle sleeve 2. The fixed base 1 has a third mounting hole 12. The rotary motor 212 is mounted at the opening of the third mounting hole 12. The output end of the rotary motor 212 is connected to one end of the drive shaft 211 to drive the drive shaft 211 to rotate. The other end of the drive shaft 211 has a first adjustment hole 2111. The end of the chuck seat 3 near the drive shaft 211 extends into an insertion part 32 for insertion into the first adjustment hole 2111. The outer surface of the drive shaft 211 has an adjustment through hole 2112 radially. The bottom of the first adjustment hole 2111 has a second adjustment hole 2113 for communicating with the adjustment through hole 2112. The connecting shaft 213 is slidably installed in the first adjusting hole 2111. One end of the connecting shaft 213 extends out from the second adjusting hole 2113. The left end of the connecting shaft 213 is provided with a locking block 2131 for abutting against the opening of the second adjusting hole 2113 to restrict the movement of the connecting shaft 213. The insertion part 32 is provided with a fourth mounting hole 321 for communicating with the second mounting hole 31. The right end of the connecting shaft 213 is inserted into the fourth mounting hole 321 for connecting the left end of the chuck connector 4. The pushing device is provided in the fixed base 1 for pushing the locking block 2131 to slide in the adjusting through hole 2112, so that the locking block 2131 can drive the connecting shaft 213 to slide. Then the connecting shaft 213 drives the chuck connector 4 to slide synchronously, so that the clamping part 41 located on the chuck connector 4 can slide in the second mounting hole 31.

[0035] Specifically, a spherical bearing is installed in the spindle sleeve 2, and the drive shaft 211 has a stepped shaft. The drive shaft 211 is inserted into the third mounting hole 12 of the fixed seat 1. After the right end of the drive shaft 211 is inserted into the spherical bearing, it extends out from the first mounting hole 11 to connect with the chuck seat 3. At this time, the stepped side of the stepped shaft simultaneously abuts against the inner side of the spherical bearing. Then, the output end of the rotating motor 212 is connected to the left end of the drive shaft 211 to drive the drive shaft 211 to rotate, thereby achieving the effect of the drive shaft 211 rotating within the fixed seat 1. The insertion part 32 and the first adjusting hole 2111 are interference-fitted, so that the connection between the chuck seat 3 and the drive shaft 211 is tight and can withstand a large torque. At the same time, when the drive shaft 211 rotates, it can synchronously drive the chuck seat 3 to rotate, and thus synchronously drive the chuck connector 4 located on the chuck seat 3 to rotate synchronously. Reference Figure 2 and Figure 6The two ends of the locking block 2131 extend from the two ends of the adjusting through hole 2112, and the opening size of the adjusting through hole 2112 is larger than the thickness of the locking block 2131, resulting in a gap between the locking block 2131 and the adjusting through hole 2112. This gap serves as the sliding stroke of the locking block 2131 at the adjusting through hole 2112. The cooperation between the locking block 2131 and the adjusting through hole 2112 restricts the stroke of the connecting shaft 213, thus providing a mechanical limiting function for the connecting shaft 213. (Reference) Figure 2 and Figure 6 When the locking block 2131 slides to the left, it drives the connecting shaft 213 to move to the left. At this time, the connecting shaft 213 simultaneously drives the chuck connector 4 to move to the left, and the clamping part 41 is in a clamped state. When the locking block 2131 slides to the right, it drives the connecting shaft 213 to move to the right, and the connecting shaft 213 drives the chuck connector 4 to move to the right. At this time, the clamping part 41 is in a loosened state for the shaft workpiece, and people can take out the shaft workpiece from the clamping part 41.

[0036] Further as Figures 1-3 and Figures 6-9In this embodiment of the utility model, the pushing device includes a thrust bearing 2141, a rotating washer 2142, a piston 2143, and an oil cover 2144. The thrust bearing 2141 is sleeved on the outer shaft surface of one end of the drive shaft 211, the rotating washer 2142 is sleeved on the drive shaft 211, and the rotating washer 2142 is located between the locking block 2131 and the thrust bearing 2141. The piston 2143 has a sleeve hole 21431 for sleeved on the drive shaft 211, and the piston 2143 has a first abutment. Part 21432 is used to abut against the left side of the thrust bearing 2141 away from the rotating washer 2142. The oil passage cover 2144 has two outer ring grooves 21441. The fixed base 1 has an annular mounting groove 13 for mounting the oil passage cover 2144. The outer ring grooves 21441 abut against the groove surface of the annular mounting groove 13 to form an annular sealing space. The oil passage cover 2144 has an inner ring groove 21442. The outer surface of the piston 2143 abuts against the inner ring groove 21442 to seal the inner ring groove 21442. Piston 2143 is provided with an annular protrusion 21433. The edge of the annular protrusion 21433 abuts against the inner annular groove 21442 to divide the inner annular groove 21442 into a first annular sealing area 21442a and a second annular sealing area 21442b. The end face of the fixed seat 1 near the outer annular groove 21441 is provided with oil injection holes 14 for connecting the outer annular groove 21441. A first guide hole 2144 is provided on the surface of the outer annular groove 21441 near the first annular sealing area 21442a. 11 is used to connect the first annular sealing area 21442a. A second guide hole 214412 is provided on the surface of another outer annular groove 21441 near the second annular sealing area 241442b for connecting the second annular sealing area 241442b. An elastic element 215 is provided between the connecting shaft 213 and the first adjusting hole 2111. The connecting shaft 213 has a second abutment portion 2132, which forms a buffer space 216 with the insertion portion 32 for installing the elastic element 215. The elastic element 215 can be a spring, which can be sleeved on the connecting shaft 213 for installation.

[0037] Specifically, hydraulic oil is injected through the oil injection hole 14 on the left side of the fixed seat 1. The hydraulic oil enters the first annular sealing area 21442a through the first guide hole 214411. The hydraulic oil pushes the left side of the annular protrusion 21433 to drive the piston 2143 to move to the right. The piston 2143 drives the thrust bearing 2141 to move to the right. The thrust bearing 2141 pushes the rotating washer 2142 to move to the right. The rotating washer 2142 further pushes the locking block 2131 to the right. The locking block 2131 then drives the connecting shaft 213 to move to the right. The connecting shaft 213 drives the chuck connector 4 to move to the right. The clamping part 41 gradually slides out from the second mounting hole 31. Under its own elastic restoring force, the clamping part 41 opens radially, releasing the shaft workpiece. At the same time, when the connecting shaft 213 moves to the right, the second abutment part 2132 moves to the right to press the elastic element 215 located in the buffer space 216. At this time, the elastic element 215 is in a compressed state. When needed... When clamping shaft-type workpieces, hydraulic oil is injected from the right oil injection hole 14 of the fixed seat 1. The hydraulic oil enters the second annular sealing area 241442b through the second guide hole 214412. The hydraulic oil pushes the right side of the annular protrusion 21433 to drive the piston 2143 to gradually move to the left. The compressive force on the elastic element 215 squeezed in the buffer space 216 gradually decreases. The elastic element 215 is pushed by its own elastic recovery to move the second abutment part 2132 to the left. The second abutment part 2132 drives the connecting shaft 213 to move to the left. The connecting shaft 213 synchronously drives the chuck connector 4 to move to the left, so that the chuck connector 4 moves towards the inside of the chuck seat 3 until the clamping part 41 contacts the right edge of the second mounting hole 31. As the chuck connector 4 moves further into the chuck seat 3, the radial pressure on the clamping part 41 and the second mounting hole 31 increases. The clamping part 41 gradually contracts radially to clamp the shaft-type workpiece to be processed.

[0038] Further as Figures 1-2 In this embodiment of the invention, the outer opening of the second mounting hole 31 is flared outward to form a trumpet hole. The trumpet hole design of the opening of the second mounting hole 31 can guide the clamping part 41 to be smoothly inserted. Even in the case of slight alignment errors, it can avoid interference or damage between the conical surface of the clamping part 41 and the opening, thereby improving the reliability of the clamping action.

[0039] Further as Figures 1-3 , Figure 5 and Figure 7 In this embodiment of the utility model, the pushing device further includes at least two first sealing rings 2145. At least two first annular grooves 21443 are provided on the surface of the oil cover 2144 near the outer annular groove 21441. The two first sealing rings 2145 are respectively fitted in the first annular grooves 21443 to enhance the sealing performance between the oil cover 2144 and the annular mounting groove 13.

[0040] Two outer annular grooves 21441 divide the surface of the oil passage cover 2144 into a first annular surface 21444, a second annular surface 21445, and a third annular surface 21446. The pushing device includes three first sealing rings 2145. The oil passage cover 2144 is provided with three first annular grooves 21443. The three first annular grooves 21443 are located on the first annular surface 21444, the second annular surface 21445, and the third annular surface 21446, respectively. Each first annular groove 21443 is fitted with a first sealing ring 2145 to enhance the sealing between the surface of the oil passage cover 2144 and the annular mounting groove 13.

[0041] The inner ring groove 21442 divides the inner surface of the oil cover 2144 into a first inner ring surface 21447 and a second inner ring surface 21448. The pushing device also includes two second sealing rings 2146. The oil cover 2144 is provided with two second annular grooves 21449. The two second annular grooves 21449 are located on the first inner ring surface 21447 and the second inner ring surface 21448, respectively. Each second annular groove 21449 is provided with a second sealing ring 2146 to enhance the sealing between the inner surface of the oil cover 2144 and the outer surface of the piston 2143.

[0042] The outer surface of the annular protrusion 21433 is provided with a third annular groove 214331. The pushing device also includes a third sealing ring 2147, which is fitted onto the third annular groove 214331 to enhance the sealing between the outer surface of the annular protrusion 21433 and the inner annular groove 21442. Multiple sealing rings (first sealing ring 2145, second sealing ring 2146, and third sealing ring 2147) form multiple sealing barriers between the oil passage cover 2144 and the fixed seat 1 (static sealing) and between the oil passage cover 2144 and the piston 2143 (dynamic sealing), ensuring the sealing performance of the hydraulic system under high-pressure rotation conditions.

[0043] The working principle of this utility model is as follows: 1. Loading: Insert the shaft workpiece to be processed into the insertion hole 411 of the chuck connector 4.

[0044] 2. Clamping: Pressurized oil is injected through the oil injection hole 14 on the right side of the fixed seat 1. The oil enters the second annular sealing area 241442b, pushing the piston 2143 to move to the left. At the same time, the pre-compressed elastic element 215 in the buffer space 216 releases energy, jointly pushing the connecting shaft 213 to move to the left. The connecting shaft 213 pushes the chuck connector 4 to slide to the left, so that its conical clamping part 41 enters the second mounting hole 31 of the chuck seat 3. The clamping part 41 contracts radially, thereby firmly clamping the workpiece. 3. Machining: The rotary motor 212 starts, driving the drive shaft 211, the chuck 3, and the clamped workpiece to rotate at high speed together to perform gear hobbing. During this process, the hydraulic system maintains pressure, and the clamping state remains stable.

[0045] 4. Releasing and unloading: After processing, pressurized oil is injected through the oil injection hole 14 on the left side of the fixed seat 1, pushing the piston 2143 to move to the right, overcoming the elastic force of the elastic element 215, and pulling the chuck connector 4 to slide to the right through the locking block 2131 and the connecting shaft 213. The clamping part 41 exits from the second mounting hole 31 and opens radially, releasing the workpiece, and the processed shaft workpiece can be removed. The elastic element 215 is compressed in this process, storing energy for the next clamping.

[0046] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A clamping device for gear manufacturing, characterized in that, The device includes a fixed base (1), a spindle sleeve (2), a chuck seat (3), and a chuck connector (4). The fixed base (1) has a hollow internal structure and a first mounting hole (11). One end of the spindle sleeve (2) is inserted into the interior of the fixed base (1) through the first mounting hole (11). The other end of the spindle sleeve (2) is connected to one end of the chuck seat (3). The other end of the chuck seat (3) has a second mounting hole (31) for the insertion of the chuck connector (4). The outer opening of the second mounting hole (31) is chamfered or rounded. The chuck connector (4) has a clamping part (41). The clamping part (41) is provided with an insertion hole (411) for inserting the shaft workpiece to be processed. The clamping part (41) is provided with at least two opening slots (412) along the axial direction. The opening slots (412) are connected to the insertion hole (411) so that the clamping part (41) is a split structure. The outer surface of the clamping part (41) is a conical surface. The spindle sleeve (2) is provided with a first drive module for driving the chuck connector (4) to slide at the second mounting hole (31). When the chuck connector (4) slides toward the second mounting hole (31), the outer opening of the second mounting hole (31) abuts against the conical surface, and the clamping part (41) retracts radially to clamp the shaft workpiece to be processed.

2. The clamping device according to claim 1, characterized in that, The first drive module includes a drive shaft (211), a rotary motor (212), a connecting shaft (213), and a push device. The drive shaft (211) is rotatably mounted inside the spindle sleeve (2). The fixed seat (1) has a third mounting hole (12). The rotary motor (212) is mounted in the opening of the third mounting hole (12). The output end of the rotary motor (212) is connected to one end of the drive shaft (211) to drive the drive shaft (211) to rotate. The other end of the drive shaft (211) has a first adjustment hole (2111). The end of the chuck seat (3) near the drive shaft (211) extends into an insertion part (32) for insertion into the first adjustment hole (2111). The outer surface of the drive shaft (211) has an adjustment hole along the radial direction. The bottom of the first adjustment hole (2111) is provided with a second adjustment hole (2113) for connecting the adjustment through hole (2112). The connecting shaft (213) is slidably installed in the first adjustment hole (2111). One end of the connecting shaft (213) extends out from the second adjustment hole (2113). One end of the connecting shaft (213) is provided with a locking block (2131). The insertion part (32) is provided with a fourth mounting hole (321) for connecting the second mounting hole (31). The other end of the connecting shaft (213) is inserted into the fourth mounting hole (321) for connecting one end of the clamp connector (4). The pushing device is set in the fixed seat (1) for pushing the locking block (2131) to slide in the adjustment through hole (2112).

3. The clamping device according to claim 2, characterized in that, The driving device includes a thrust bearing (2141), a rotating washer (2142), a piston (2143), and an oil duct (2144). The thrust bearing (2141) is sleeved on the outer shaft surface of one end of the drive shaft (211). The rotating washer (2142) is sleeved on the drive shaft (211) and is located between the retaining block (2131) and the thrust bearing (2141). The piston (2143) has a sleeve hole (21431) for sleeved on the drive shaft (211). The piston (2143) is provided with a first abutting part (21432) to abut against the side of the thrust bearing (2141) away from the rotating washer (2142). The oil cover (2144) is provided with two outer ring grooves (21441). The fixed seat (1) is provided with an annular mounting groove (13) for installing the oil cover (2144). The outer ring grooves (21441) abut against the groove surface of the annular mounting groove (13) to form an annular sealing space. The oil cover (2144) is provided with an inner ring groove ( 21442), the outer surface of the piston (2143) abuts against the inner annular groove (21442) to seal the inner annular groove (21442), the piston (2143) is provided with an annular protrusion (21433), the edge of the annular protrusion (21433) abuts against the inner annular groove (21442) to divide the inner annular groove (21442) into a first annular sealing area (21442a) and a second annular sealing area (21442b), the fixed seat (1) is close to the end face of the outer annular groove (21441). Each outer ring groove (21441) is provided with an oil injection hole (14) for connecting to the outer ring groove (21441). A first guide hole (214411) is provided on the surface of one outer ring groove (21442a) near the first annular sealing area (21442a) for connecting to the first annular sealing area (21442a). A second guide hole (214412) is provided on the surface of the other outer ring groove (21441) near the second annular sealing area (241442b) for connecting to the second annular sealing area (241442b).

4. The clamping device according to claim 2, characterized in that, An elastic element (215) is provided between the connecting shaft (213) and the first adjusting hole (2111). The connecting shaft (213) is provided with a second abutting part (2132). The second abutting part (2132) and the insertion part (32) form a buffer space (216) for installing the elastic element (215).

5. The clamping device according to claim 1, characterized in that, The outer opening of the second mounting hole (31) expands outward to form a trumpet hole.

6. The clamping device according to claim 2, characterized in that, The insertion part (32) and the first adjustment hole (2111) are interference fit.

7. The clamping device according to claim 3, characterized in that, The driving device also includes at least two first sealing rings (2145). The surface of the oil cover (2144) near the outer ring groove (21441) is provided with at least two first annular grooves (21443). The two first sealing rings (2145) are respectively fitted in the first annular grooves (21443) to enhance the sealing between the oil cover (2144) and the annular mounting groove (13).

8. The clamping device according to claim 3, characterized in that, Two outer annular grooves (21441) divide the surface of the oil cover (2144) into a first annular surface (21444), a second annular surface (21445), and a third annular surface (21446). The pushing device includes three first sealing rings (2145). The oil cover (2144) is provided with three first annular grooves (21443). The three first annular grooves (21443) are located on the first annular surface (21444), the second annular surface (21445), and the third annular surface (21446), respectively. Each first annular groove (21443) is fitted with a first sealing ring (2145) to enhance the sealing between the surface of the oil cover (2144) and the annular mounting groove (13).

9. The clamping device according to claim 3, characterized in that, The inner ring groove (21442) divides the inner surface of the oil hood (2144) into a first inner ring surface (21447) and a second inner ring surface (21448). The pushing device also includes two second sealing rings (2146). The oil hood (2144) is provided with two second annular grooves (21449). The two second annular grooves (21449) are located on the first inner ring surface (21447) and the second inner ring surface (21448), respectively. Each second annular groove (21449) is provided with a second sealing ring (2146) to enhance the sealing between the inner surface of the oil hood (2144) and the outer surface of the piston (2143).

10. The clamping device according to claim 3, characterized in that, The outer surface of the annular protrusion (21433) is provided with a third annular groove (214331), and the pushing device also includes a third sealing ring (2147). The third annular groove (214331) is fitted with a third sealing ring (2147) to enhance the sealing between the outer surface of the annular protrusion (21433) and the inner annular groove (21442).

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