TW202110565A - Gear type tool clamp - Google Patents

Abstract

A gear type tool clamp includes a first body, a second body, a claw seat, a thread rod, a bevel gear, and a drive gear. The first body has an inner thread and an inner ring groove. The second body has an installation bore, an outer thread combined with the inner thread, and an outer periphery combined with the inner ring groove. The claw seat and the thread rod are disposed between the first and second bodies. The claw seat has claw grooves for receiving plural claws. The thread rod has one end combined with the claws. The bevel gear is in the second body and screwed to the thread rod. The drive gear is rotatable in the installation bore and geared with the bevel gear. Therefore, the concentricity of the tool clamp is improved, achieving a stable tool clamping effect.

Description

Gear chuck with stable clamping

The invention relates to a chuck, in particular to a gear type chuck with stable clamping.

Please refer to Taiwan Patent No. M578626, which discloses a gear-type chuck, which includes a first body, a second body, a clamping jaw seat arranged between the first body and the second body, and a first bevel gear , A clamping jaw driver and a second bevel gear. The first bevel gear is screwed on the clamping jaw driving member, and the second bevel gear is meshed with the first bevel gear so as to use a tool to drive the second bevel gear and drive the first bevel gear to rotate, so that the clamping jaw driving member is opposite to the second bevel gear. The body moves axially so that the chuck can hold the tool or release the tool.

However, the aforementioned first body and second body are only threaded to each other. The combination of threads cannot achieve a high-precision concentric fit, which affects the stability of the clamping tool, and at the same time cannot make the clamping jaw seat and The clamping jaws fit effectively, so that the clamping jaws are suspended, which affects the clamping performance.

In order to solve the above-mentioned problems, the present invention discloses a gear type chuck with stable clamping. The first body and the second body are screwed with each other by threads, and the outer periphery and the inner ring hole are matched with each other, thereby increasing the first body and the inner ring hole. The concentricity of the second body enables the chuck to hold the tool stably.

To achieve the above objective, an embodiment of the present invention provides a gear-type chuck with stable clamping, which includes a first body, a second body, a clamping jaw fixing seat, a screw, a bevel gear, and a Drive gear. The first body is in the shape of a conical shell. One end of the first body has an internal thread and an inner ring hole coaxially arranged; the second body has an external thread and an outer peripheral edge coaxially arranged, the external thread and the internal thread screw The outer periphery of the second body has an installation hole on the outer edge of the inner ring hole; the clamping jaw fixing seat is arranged between the first body and the second body, and one end of the clamping jaw fixing seat is arranged along the A plurality of clamping jaw grooves are provided in the axial direction for accommodating a plurality of clamping jaws; the screw is arranged between the first body and the second body, and one end of the screw is for the sliding connection of the clamping jaws; the bevel gear is It is arranged in the second body and is screwed on the screw; the driving gear rotates and is arranged in the installation hole of the second body and meshes with the bevel gear.

In this way, in addition to screwing the first body and the second body, the outer periphery and the inner ring hole are precisely matched to each other, thereby increasing the concentricity of the first body and the second body, so that the chuck can be clamped stably. Hold the tool.

The exemplary embodiments of the present invention are described in detail below with reference to the drawings, and are not intended to limit the technical principles of the present invention to specific disclosed embodiments, and the scope of the present invention is only limited by the scope of the patent application, covering alternatives, modifications and Equivalent.

Please refer to Figures 1 to 7, which is the first embodiment of the present invention, which discloses a gear-type chuck 100 with stable clamping, which includes a first body 10, a second body 20, and a clamping jaw fixed The seat 30, a screw 40, a bevel gear 50 and a drive gear 60.

The first body 10 is in the shape of a conical shell. One end of the first body 10 has an inner thread 11 and an inner ring hole 12 coaxially arranged. The inner ring hole 12 has a first ring hole 121 and a second ring hole 122 disposed at both ends of the internal thread 11, and the inner diameter of the first ring hole 121 is smaller than the inner diameter of the second ring hole 122. The ring hole 12 can be made by precision machining.

The second body 20 has a first end 201 and a second end 202, the second end 202 is connected to the machine tool, and the first end 201 has an external thread 21 and an outer peripheral edge 22 coaxially arranged, the external thread 21 and The internal thread 11 is screwed to connect the first body 10 and the second body 20 to each other. Wherein, the outer peripheral edge 22 has a first outer peripheral edge 221 and a second outer peripheral edge 222 disposed at both ends of the external thread 21, and the outer diameter of the first outer peripheral edge 221 is smaller than the outer diameter of the second outer peripheral edge 222, and the first outer peripheral edge The rim 221 and a second outer periphery 222 are made by precision machining, so that when the first body 10 and the second body 20 are screwed together, the first outer periphery 221 fits the first ring hole 121, and the second outer periphery 222 It is adapted to the second ring hole 122, which can improve the concentricity of the first body 10 and the second body 20 more than the threaded assembly method, as shown in a partial enlarged view of FIG. 5. In addition, the outer edge of the second body 20 has a mounting hole 23 communicating with the inside, and the center line of the mounting hole 23 is closer to the second end 202 than the screw joint of the external thread 21 and the internal thread 11. In addition, the second body 20 is provided with a positioning groove 24 at the first end 201, and the inner ring of the second body 20 is provided with an inner shoulder 25.

The clamping jaw fixing seat 30 is arranged between the first body 10 and the second body 20. One end of the clamping jaw fixing seat 30 is provided with a taper portion 31. The taper portion 31 is generally hollow and has a plurality of tapers along the axial direction. The clamping jaw groove 32 is used for accommodating a plurality of clamping jaws 33. As shown in FIG. 3, each clamping jaw 33 has a set of setting portions 331, two side surfaces 332, and a bevel portion 333 located between the two side surfaces 332, and a chip removal is provided between the bevel portion 333 and each side surface 332. Groove 334, so that during the grinding process of the clamping jaw 33, its debris can be discharged from the chip removal groove 334, which improves the accuracy of the clamping jaw 33, so that the clamping jaw 33 can be effectively attached to the first body 10 The inner edge, as shown in FIG. 4, avoids a clearance with the first body 10, which causes the clamping jaw 33 to be in a suspended state, which affects the performance of concentricity.

The clamping jaw fixing seat 30 further has a pin hole 34 for embedding a fixing pin 35. When the clamping jaw fixing seat 30 is installed between the first body 10 and the second body 20, the fixing pin 35 can be inserted and positioned in the positioning groove 24. The clamping jaw fixing seat 30 has a ring 36 opposite to the clamping jaw groove 32.

The screw 40 is arranged between the first body 10 and the second body 20. One end of the screw 40 has a threaded section 41, and the other end has a plurality of sliding grooves 42 for the assembly portion 331 of the clamping jaw 33 to be slidably connected to Chute 42.

The bevel gear 50 is arranged in the second body 20 and screwed on the threaded section 41 of the screw 40. Wherein, the bevel gear 50 has a first tooth portion 51 facing the second body 20, and a back side of the first tooth portion 51 is provided with an abutting portion 52. The ring portion 36 of the clamping jaw fixing seat 30 can bear against the abutting portion 52 and the inner shoulder portion 25, as shown in FIG. 4.

The driving gear 60 is rotatably arranged in the mounting hole 23 of the second body 20 and meshes with the bevel gear 50. The driving gear 60 has a second tooth portion 61 that meshes with the first tooth portion 51. Furthermore, the driving gear 60 is different from the second tooth portion 61 with a polygonal tool hole 62 for the wrench tool to be connected to operate the driving gear 60 to rotate, so that the driving gear 60 drives the bevel gear 50 to rotate, so as to make the screw 40 The axial displacement is generated relative to the first body 10 and the second body 20, thereby closing or loosening the clamping jaw 33.

Among them, the present invention includes a limiting member 70 connected to the mounting hole 23 to prevent the driving gear 60 from falling out.

Furthermore, the present invention has a shock absorbing device 80 between the first body 10 and the second body 20. Through the shock absorbing device 80, the chuck can reduce the vibration caused by the tool during the operation, thereby prolonging the service life of the tool and Ensure the accuracy of each component. The shock-absorbing device 80 includes a plurality of shock-absorbing balls 81, and the shock-absorbing balls 81 are ringed around the outer periphery 22 of the second body 20 and located on one side of the external thread 21. In the embodiment of the present invention, the first outer periphery 221 of the second body 20 is provided with a plurality of small holes 82 for embedding the shock-absorbing ball 81.

In addition, the shock absorbing device 80 further includes an O-ring 83 disposed on the other side of the external thread 21, that is, adjacent to the second outer peripheral edge 222, and the shock absorbing ball 81 and the O-ring 83 provide a shock absorbing effect.

Next, please refer to FIG. 7, which is a schematic diagram of the unfolded state of the clamping jaws of the present invention. When the drive gear 60 is driven by a wrench tool, the drive gear 60 drives the bevel gear 50 to rotate, and the screw 40 can generate an axial displacement relative to the first body 10 and the second body 20, thereby loosening the clamping jaw 33 Open (unfold) to install or replace the tool, which is quite convenient in operation.

As shown in Figures 8 and 9, it is the second embodiment of the present invention. It is different from the first embodiment in that the second body 20 in this embodiment has a longer size and a tapered shape, which can be used in different applications. Spindle of the machine tool.

Therefore, the present invention has the following advantages:

1. The first body 10 and the second body 20 are screwed to each other with threads, and the outer periphery 22 and the inner ring hole 12 are matched with each other, thereby increasing the concentricity of the first body 10 and the second body 20, so that the chuck can be stabilized Clamp the tool.

2. Both the driving gear 60 and the bevel gear 50 are arranged on the second body 20, which can increase the operating torque, thereby making the operation more convenient.

3. The clamping jaw 33 has a chip removal groove 334, so as to improve the machining accuracy of the clamping jaw 33, so that it can effectively fit the inner edge of the first body 10, and also has the performance of improving the concentricity.

4. Through the shock absorber 80, the chuck reduces the vibration caused by the tool when performing operations, prolongs the service life of the tool and ensures the accuracy of each component.

Although the present invention is described in a preferred embodiment, those skilled in the art can make various changes without departing from the spirit and scope of the present invention. The above-mentioned embodiments are only used to illustrate the present invention, and are not used to limit the scope of the present invention. All modifications or changes made without violating the spirit of the present invention belong to the scope of the patent application of the present invention.

100: Gear chuck 10: The first body 11: Internal thread 12: inner ring hole 121: first ring hole 122: second ring hole 20: The second body 201: first end 202: second end 21: External thread 22: outer periphery 221: first outer periphery 222: second outer periphery 23: Installation hole 24: positioning groove 25: inner shoulder 30: gripper holder 31: Cone 32: Gripper groove 33: Gripper 331: Assembly Department 332: side 333: Hypotenuse 334: Chip groove 34: pin hole 35: fixed pin 36: Ring 40: screw 41: thread section 42: Chute 50: bevel gear 51: first tooth 52: abutment 60: drive gear 61: second tooth 62: Tool hole 70: limit piece 80: shock absorber 81: shock absorbing ball 82: small hole 83: O-ring

[Fig. 1] is a schematic diagram of the appearance of the first embodiment of the present invention. [Figure 2] is an exploded view of the structure of the first embodiment of the present invention. [Figure 3] is a schematic diagram of the clamping jaw structure of the first embodiment of the present invention. [Fig. 4] is a cross-sectional view of the present invention taken along the line 4-4 in Fig. 1. [Figure 5] is a partial enlarged schematic view of Figure 4 of the present invention. [Fig. 6] is a cross-sectional view of the present invention taken along the line 6-6 in Fig. 1. [Fig. 7] is a schematic diagram of the unfolded state of the clamping jaws of the first embodiment of the present invention. [Fig. 8] is a schematic diagram of the appearance of the second embodiment of the present invention. [Fig. 9] is a cross-sectional view of the present invention taken along the line 9-9 in Fig. 8.

100: Gear chuck

10: The first body

20: The second body

201: first end

202: second end

21: External thread

22: outer periphery

221: first outer periphery

222: second outer periphery

23: Installation hole

24: positioning groove

25: inner shoulder

30: gripper holder

31: Cone

32: Gripper groove

33: Gripper

331: Assembly Department

332: side

333: Hypotenuse

334: Chip groove

34: pin hole

35: fixed pin

36: Ring

40: screw

41: thread section

42: Chute

50: bevel gear

51: first tooth

52: abutment

60: drive gear

61: second tooth

70: limit piece

80: shock absorber

81: shock absorbing ball

82: small hole

83: O-ring

Claims (10)

A gear type chuck with stable clamping, which comprises: A first body, which is in the shape of a conical shell, one end of the first body has an inner thread and an inner ring hole coaxially arranged; A second body having an outer thread and an outer periphery arranged coaxially, the outer thread is screwed with the inner thread, and the outer periphery fits and fits the inner ring hole, the outer periphery of the second body Has a mounting hole; A clamping jaw fixing seat is arranged between the first body and the second body. One end of the clamping jaw fixing seat is provided with a plurality of clamping jaw grooves along the axial direction for accommodating a plurality of clamping jaws; A screw is arranged between the first body and the second body, one end of the screw is slidably connected with the clamping jaws; A bevel gear is arranged in the second body and screwed on the screw; and A driving gear is rotatably arranged in the installation hole of the second body and meshes with the bevel gear. The gear-type chuck with stable clamping according to claim 1, wherein a shock-absorbing device is provided between the first body and the second body. The gear-type chuck with stable clamping according to claim 2, wherein the shock-absorbing device includes a plurality of shock-absorbing balls, and the shock-absorbing balls are arranged around the outer periphery and located on one side of the external thread. The gear-type chuck with stable clamping according to claim 3, wherein the shock-absorbing device further includes an O-ring arranged on the other side of the external thread. The gear-type chuck with stable clamping according to claim 1, wherein a plurality of sliding grooves are provided at one end of the screw for the sliding of the end of the clamping jaw; the clamping jaw has two sides and An oblique side portion located between the two side surfaces, a chip removal groove is arranged between the oblique side portion and each side surface. The gear-type chuck with stable clamping according to claim 1, wherein the inner ring hole has a first ring hole and a second ring hole provided at both ends of the internal thread, and the inner ring hole of the first ring hole The diameter is smaller than the inner diameter of the second ring hole, the outer peripheral edge has a first outer peripheral edge and a second outer peripheral edge disposed at both ends of the external thread, the first outer peripheral edge is adapted to the first ring hole, and the The two outer peripheral edges are fitted with the second annular hole, and the outer diameter of the first outer peripheral edge is smaller than the outer diameter of the second outer peripheral edge. The gear chuck with stable clamping according to claim 6, wherein the bevel gear has a first tooth portion facing the second body, and the drive gear has a second tooth portion and the first tooth portion The bevel gear is provided with an abutting portion on the back side of the first tooth portion, the inner side of the second body is provided with an inner shoulder portion, the clamping jaw fixing seat is opposite to the clamping jaw grooves with a ring portion and Supports the abutment part and the inner shoulder part. The gear-type chuck with stable clamping according to claim 7, wherein the clamping jaw fixing seat has a pin hole for embedding a fixing pin, and the end edge of the second body is provided with a positioning groove, Place the fixed pin for positioning. The gear chuck with stable clamping according to claim 8, wherein the second body has a first end and a second end, the first end has the external thread and the outer periphery, and the mounting The center line of the hole is closer to the second end than the screw joint of the external thread and the internal thread. The gear-type chuck with stable clamping as described in claim 9 further includes a limiting member connected to the mounting hole to prevent the driving gear from falling out.

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