Tapping clamp and machine tool

Abstract

The utility model discloses a tapping fixture and machine tool, tapping fixture includes: connecting handle, screw die frame, screw die sleeve and elastic reset mechanism, the screw die frame is provided with the connecting handle and forms the assembly hole, the screw die sleeve is provided in the assembly hole and forms the mounting hole, the diameter of the screw die sleeve is less than the inner diameter of the assembly hole, the screw die is suitable for mounting in the mounting hole, the elastic reset mechanism is provided with the elastic reset mechanism. The elastic reset mechanism is arranged between the threading die sleeve and the threading die frame and used for driving the central axis of the threading die sleeve to move towards the central axis of the threading die frame. According to the tapping clamp, when the central axis of the to-be-tapped piece is slightly eccentric relative to the central axis of the die frame, the die installed in the die sleeve can move to the position coaxial with the to-be-tapped piece, so that the situation that the to-be-tapped piece deflects relative to the central axis of the die, and consequently tapping is distorted and broken is avoided, and meanwhile the tapping clamp is simple in structure and convenient to use. And the procedure of aligning the to-be-tapped piece to the center of the threading die is omitted, and the tapping quality and efficiency of the tapping clamp can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a tapping fixture and a processing machine tool. Background Art

[0002] With the continuous advancement of machining technology, lathes are increasingly used, especially in thread machining. The tapping process places extremely high demands on thread quality and precision. However, in practice, insufficient alignment between the lathe's tailstock and spindle, especially when the tailstock has not been adjusted for extended periods, often leads to eccentricity. This can cause workpiece misalignment during tapping, leading to problems such as thread rot, rough surfaces, and thread breakage, seriously impacting tapping quality and efficiency. Therefore, improvements are needed. Utility Model Content

[0003] The first aspect of the present invention provides a tapping fixture, which can avoid tapping distortion and tooth decay caused by the deviation of the tapped workpiece relative to the central axis of the die, thereby improving the tapping quality and efficiency.

[0004] According to the first aspect of the present invention, the tapping fixture includes: a connecting handle; a die frame, which is provided on the connecting handle and formed with an assembly hole; a die sleeve, which is provided in the assembly hole and formed with a mounting hole, the diameter of the die sleeve is smaller than the inner diameter of the assembly hole, and the die is suitable for being installed in the mounting hole; an elastic reset mechanism, which is provided between the die sleeve and the die frame and is used to drive the central axis of the die sleeve to move toward the central axis of the die frame, and the elastic reset mechanism includes a plurality of groups of elastic reset components arranged at intervals along the circumference of the assembly hole on the outer peripheral side of the die sleeve, and the plurality of groups of elastic reset components include at least two groups for driving the central axis of the die sleeve to move along a first direction and a second direction toward the central axis of the die frame respectively.

[0005] According to the tapping fixture of the first aspect of the present invention, an elastic reset mechanism is provided between the die holder and the die sleeve. When the centerline axis of the workpiece to be tapped is slightly eccentric relative to the central axis of the die holder, the die installed in the die sleeve can be moved to a position coaxial with the workpiece to be tapped. This can flexibly deal with the eccentricity problem of the workpiece to be tapped, so as to avoid tapping distortion and tooth rot caused by the deviation of the workpiece to be tapped relative to the central axis of the die. At the same time, the process of calibrating the workpiece to be tapped and the center of the die is eliminated, which is beneficial to improving the tapping quality and efficiency of the tapping fixture.

[0006] According to the tapping fixture of the embodiment of the first aspect of the present utility model, the first direction and the second direction are both perpendicular to the axial direction of the assembly hole, and there is an angle between the first direction and the second direction.

[0007] According to some embodiments of the present invention, a plurality of groups of the elastic reset components are evenly spaced along the circumference of the assembly hole.

[0008] According to some embodiments of the present invention, the elastic reset assembly includes: a connecting piece and a spring reset unit, a plurality of movable matching grooves corresponding to the plurality of connecting pieces are formed on the inner circumferential surface of the assembly hole, one end of the connecting piece is movably arranged in the movable matching groove and the other end is connected to the die sleeve, and the spring reset unit is provided with two distributed on opposite sides of the connecting piece in the circumferential direction of the assembly hole and supported between the die frame and the connecting piece.

[0009] According to some embodiments of the present invention, the die frame is further formed with mounting grooves located on opposite sides of the movable mating groove in the circumferential direction of the assembly hole and connected to the movable mating groove. The spring reset unit is arranged in the mounting groove and includes a movable pin and a reset spring. The movable pin is supported between the reset spring and the connecting member, and the movable pin is slidable along the extension direction of the mounting groove.

[0010] According to some embodiments of the present invention, the contact surface between the movable pin and the connecting member is an arc surface; and / or, the end of the mounting groove away from the movable mating groove extends to the outer peripheral surface of the die frame, and the reset assembly also includes a fastener connected to the mounting groove, and the fastener is arranged on the side of the spring reset unit away from the movable pin.

[0011] According to some embodiments of the present invention, a avoidance hole is formed on the outer peripheral surface of the die frame, which is radially opposite to and connected to the movable fitting groove along the assembly hole, and the size of the avoidance hole is smaller than the size of the movable fitting groove.

[0012] According to some embodiments of the present invention, a mating slot is formed on the outer peripheral surface of the die sleeve, and the end of the connecting piece facing away from the die frame is plugged into and mated with the mating slot.

[0013] According to some embodiments of the present invention, the connecting handle includes a sliding rod and a sliding sleeve, the sliding rod is slidably arranged in the sliding sleeve along the axial direction of the assembly hole, the die sleeve is arranged at one end of the sliding rod or the sliding sleeve, a limiting pin is provided on one of the sliding rod and the sliding sleeve, and the other of the sliding rod and the sliding sleeve is formed with a limiting groove extending along the axial direction of the assembly hole, and a part of the limiting pin is slidably arranged in the limiting groove along the axial direction of the assembly hole.

[0014] A second aspect of the present invention provides a processing machine tool.

[0015] The processing machine tool according to the embodiment of the second aspect of the present utility model includes: the above-mentioned tapping fixture.

[0016] According to the processing machine tool of the second aspect of the present invention, an elastic reset mechanism is arranged between the die holder and the die sleeve. When the centerline axis of the workpiece to be tapped is slightly eccentric relative to the central axis of the die holder, the die installed in the die sleeve can be moved to a position coaxial with the workpiece to be tapped. This can flexibly deal with the eccentricity problem of the workpiece to be tapped, so as to avoid tapping distortion and tooth rot caused by the deviation of the workpiece to be tapped relative to the central axis of the die. At the same time, the process of calibrating the workpiece to be tapped and the center of the die is eliminated, which is beneficial to improving the tapping quality and efficiency of the tapping fixture.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an exploded view of a tapping fixture according to an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the central axis of the tapping fixture according to an embodiment of the present utility model;

[0020] Figure 3 yes Figure 2 Cross-sectional view of section AA.

[0021] Reference numerals:

[0022] 100. Tapping fixture;

[0023] 1. Connecting handle; 11. Sliding rod; 111. Limiting slide groove; 12. Sliding sleeve; 121. Chip leakage hole; 13. Limiting pin;

[0024] 2. Die holder; 21. Assembly hole; 22. Movable fit slot; 23. Mounting slot; 24. Avoidance hole;

[0025] 3. Die sleeve; 31. Mounting hole; 32. Matching slot;

[0026] 4. Elastic reset mechanism; 41. Elastic reset assembly; 411. Connector; 412. Spring reset unit; 4121. Movable pin; 4122. Reset spring; 4123. Fastener;

[0027] 200. Plate teeth. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0030] The tapping fixture 100 according to the first embodiment of the present invention will be described below with reference to the accompanying drawings.

[0031] like Figure 1-Figure 3 As shown, the tapping fixture 100 according to the embodiment of the first aspect of the present invention includes: a connecting handle 1, a die frame 2, a die sleeve 3 and an elastic reset mechanism 4, the die frame 2 is arranged on the connecting handle 1 and is formed with an assembly hole 21, the die sleeve 3 is arranged in the assembly hole 21 and is formed with a mounting hole 31, the diameter of the die sleeve 3 is smaller than the inner diameter of the assembly hole 21, the die 200 is suitable for being installed in the mounting hole 31, and the elastic reset mechanism 4 is arranged between the die sleeve 3 and the die frame 2 and is used to drive the central axis of the die sleeve 3 to move toward the central axis of the die frame 2.

[0032] That is to say, the die sleeve 3 is movably arranged in the assembly hole 21 through the elastic reset mechanism 4. When the die sleeve 3 is not subjected to other external forces, the die sleeve 3 is kept in a state where the center axis is colinear with the center axis of the die frame 2 under the action of the elastic reset mechanism 4. Moreover, the die sleeve 3 can be made eccentric to a certain extent relative to the die frame 2 through the elastic reset mechanism 4, so that the die 200 installed in the mounting hole 31 can be made eccentric to a certain extent relative to the die sleeve 3. Therefore, during the processing of the workpiece to be tapped, if the workpiece to be tapped is slightly eccentric relative to the center axis of the die frame 2, when the workpiece to be tapped enters the guide part of the die 200 The workpiece to be tapped can push the die 200 and the die sleeve 3 to move in the assembly hole 21 under the action of the elastic reset mechanism 4, so that the center axis of the die 200 is colinear with the center axis of the workpiece to be tapped, thereby avoiding the distortion and rottenness of the tapping caused by the deviation of the workpiece to be tapped relative to the center axis of the die 200, so as to improve the tapping quality and accuracy of the tapping fixture 100; after the tapping of the workpiece to be tapped is completed and the die 200 is withdrawn, the die sleeve 3 can be reset to the initial position under the action of the elastic reset mechanism 4. The initial position here refers to the position where the die sleeve 3 is coaxial with the die frame 2 without the action of external force, so as to facilitate the subsequent tapping process.

[0033] In other words, by arranging an elastic reset mechanism 4 between the die frame 2 and the die sleeve 3, when the centerline axis of the workpiece to be tapped is slightly eccentric relative to the central axis of the die frame 2, the die 200 installed in the die sleeve 3 can be moved to a position coaxial with the workpiece to be tapped, thereby flexibly dealing with the eccentricity problem of the workpiece to be tapped, so as to avoid tapping distortion and tooth decay caused by the deviation of the workpiece to be tapped relative to the central axis of the die 200. At the same time, the process of calibrating the center of the workpiece to be tapped and the die 200 is eliminated, which is conducive to improving the tapping quality and efficiency of the tapping fixture 100.

[0034] According to the tapping fixture 100 of the first embodiment of the present invention, an elastic reset mechanism 4 is provided between the die frame 2 and the die sleeve 3, so that when the centerline axis of the workpiece to be tapped is slightly eccentric relative to the central axis of the die frame 2, the die 200 installed in the die sleeve 3 can be moved to a position coaxial with the workpiece to be tapped, thereby flexibly dealing with the eccentricity problem of the workpiece to be tapped, so as to avoid tapping distortion and tooth decay caused by the deviation of the workpiece to be tapped relative to the central axis of the die 200. At the same time, the process of calibrating the workpiece to be tapped and the center of the die 200 is eliminated, which is beneficial to improving the tapping quality and efficiency of the tapping fixture 100.

[0035] According to some embodiments of the present invention, the elastic reset mechanism 4 includes a plurality of groups of elastic reset components 41 arranged at circumferential intervals along the assembly hole 21 on the outer peripheral side of the plate sleeve 3, and the plurality of groups of elastic reset components 41 include at least two groups for driving the central axis of the plate sleeve 3 to move along the first direction and the second direction toward the central axis of the plate frame 2, respectively. The first direction and the second direction are both perpendicular to the axial direction of the assembly hole 21, and there is an angle between the first direction and the second direction.

[0036] That is, at least one of the multiple sets of elastic reset assemblies 41 applies a driving force to the die sleeve 3 in a first direction toward the axis close to the assembly hole 21, and at least one of the multiple sets of elastic reset assemblies 41 applies a driving force to the die sleeve 3 in a second direction toward the center axis close to the assembly hole 21. Therefore, under the combined action of the above two sets of elastic reset assemblies 41, after the die sleeve 3 is eccentric at any angle in the circumferential direction of the assembly hole 21, the elastic reset mechanism 4 can stably and accurately drive the die sleeve 3 to return to its initial position, thereby improving the reset effect of the elastic reset mechanism 4 on the die sleeve 3.

[0037] According to some embodiments of the present invention, multiple sets of elastic reset assemblies 41 are evenly spaced along the circumference of the assembly hole 21. That is, along the circumference of the assembly hole 21, the spacing between any two adjacent sets of elastic reset assemblies 41 is the same. Thus, the multiple sets of evenly spaced elastic reset assemblies 41 can evenly provide a reset driving force to the die sleeve 3 at multiple locations along the circumference of the die sleeve 3, thereby ensuring the reset effect of the elastic reset assemblies 41 on the die sleeve 3.

[0038] According to some embodiments of the present invention, the elastic reset assembly 41 includes: a connecting member 411 and a spring reset unit 412. A plurality of movable fitting grooves 22 corresponding to the plurality of connecting members 411 are formed on the inner circumferential surface of the assembly hole 21. One end of the connecting member 411 is movably arranged in the movable fitting groove 22 and the other end is connected to the die sleeve 3. The spring reset unit 412 is provided with two connecting members 411 distributed on opposite sides of the circumferential direction of the assembly hole 21 and supported between the die frame 2 and the connecting member 411.

[0039] That is, when the workpiece to be tapped, which is tilted relative to the central axis of the die sleeve 3, enters the die 200 and causes the die sleeve 3 to move in the assembly hole 21, the connecting member 411 is synchronously driven to move in the movable matching groove 22. Since the connecting member 411 is provided with spring return units 412 on both sides of the assembly hole 21 in the circumferential direction, when the workpiece to be tapped is pushed out of the die 200, the connecting member 411 can be reset to the central position under the joint action of the spring return units 412 on both sides, thereby driving the die sleeve 3 to reset to the initial position through the connecting member 411 under the joint action of the multiple sets of elastic return assemblies 41.

[0040] by Figure 3 As shown in the example, when the die sleeve 3 moves to the right relative to the die frame 2, the connecting parts 411 located on the upper and lower sides move to the right in the movable fitting groove 22, and cause the pressure of the spring reset unit 412 acting on the right side to increase. When the tapping piece is withdrawn from the die 200, the spring reset unit 412 on the right side of the connecting parts 411 located on the upper and lower sides releases elastic potential energy, pushing the connecting part 411 to move to the left in the movable fitting groove 22 until the connecting part 411 is in a balanced state with the spring reset units 412 on both sides.

[0041] In a specific example, the elastic reset components 41 are provided with four evenly spaced components along the circumference of the assembly hole 21, and two groups of elastic reset components 41 are located on opposite sides of the plate sleeve 3 in the first direction, and are used to apply a thrust to the plate sleeve 3 in the second direction to move toward the center axis close to the assembly hole 21. The two groups of elastic reset components 41 are located on opposite sides of the plate sleeve 3 in the second direction to apply a thrust to the plate sleeve 3 in the first direction to move toward the center axis close to the assembly hole 21.

[0042] According to some embodiments of the present invention, the die frame 2 is further formed with mounting grooves 23 located on opposite sides of the movable mating groove 22 in the circumferential direction of the assembly hole 21 and connected to the movable mating groove 22. The spring return unit 412 is disposed in the mounting groove 23 and includes a movable pin 4121 and a return spring 4122. The movable pin 4121 is supported between the return spring 4122 and the connecting member 411, and the movable pin 4121 is slidable along the extension direction of the mounting groove 23. In other words, the return spring 4122 pushes the movable pin 4121 toward the direction of approaching the connection, causing the end of the movable pin 4121 away from the return spring 4122 to abut against the connecting member 411, thereby applying a return thrust to the connecting member 411. In addition, the moving direction of the movable pin 4121 can be better limited by the mounting groove 23, that is, the movable pin 4121 can only move within the mounting groove 23 along the extension direction of the mounting groove 23, so that the direction of the reset thrust provided by the spring reset unit 412 to the connecting member 411 can remain unchanged, thereby ensuring the stability of the reset thrust applied by the spring reset unit 412 to the connecting member 411.

[0043] According to some embodiments of the present invention, the contact surface between the movable pin 4121 and the connecting member 411 is an arc surface. As a result, the contact area between the movable pin 4121 and the connecting member 411 can be effectively reduced, thereby reducing the resistance of the connecting member 411 to the movement of the movable pin 4121, making the sliding of the connecting member 411 relative to the movable pin 4121 smoother, and further reducing the resistance between the connecting member 411 and the movable pin 4121 that affects the alignment accuracy of the die sleeve 3 and the workpiece to be tapped, thereby improving the tapping quality and accuracy of the workpiece to be tapped.

[0044] According to some embodiments of the present invention, the mounting slot 23 extends from one end of the movable mating slot 22 to the outer peripheral surface of the die frame 2, and the elastic reset assembly 41 further includes a fastener 4123 connected to the mounting slot 23. The fastener 4123 is disposed on the side of the spring reset unit 412 that is away from the movable pin 4121. In other words, the movable pin 4121, the reset spring 4122, and the fastener 4123 can be sequentially placed into the mounting slot 23 through the opening extending from the mounting slot 23 to the outer peripheral surface of the die frame 2. The fastener 4123 prevents the movable pin 4121 and the reset spring 4122 from falling out of the mounting slot 23. The movable pin 4121 can abut against the connector 411 through the opening at one end of the mounting slot 23 that is connected to the movable mating hole, thereby applying a reset thrust to the connector 411. The outer peripheral side of the die frame 2 has a relatively open space, thereby providing a larger operating space for installing the spring reset unit 412, thereby reducing the difficulty of installing the spring reset unit 412. In addition, during the use of the tapping fixture 100, the spring return unit 412 can be adjusted or replaced through the opening of the mounting groove 23 extending to the outer peripheral surface of the tapping frame 2.

[0045] In a specific example, the fastener 4123 is a threaded fastener 4123 , and an internal thread that matches the threaded fastener 4123 is formed on the inner circumferential surface of the installation groove 23 , thereby enabling a threaded connection between the fastener 4123 and the installation groove 23 .

[0046] According to some embodiments of the present invention, an avoidance hole 24 is formed on the outer peripheral surface of the die frame 2, which is radially opposite to and connected to the movable mating groove 22 along the assembly hole 21, and the size of the avoidance hole 24 is smaller than the size of the movable mating groove 22. In the tapping process, cutting debris will be generated while the thread is formed on the part to be tapped. Therefore, by providing the avoidance hole 24, it is possible to avoid the debris generated during the tapping process from accumulating in the movable mating groove 22 and affecting the range of motion of the connector 411, that is, the debris entering the movable mating groove 22 can be discharged from the die frame 2 in time through the avoidance hole 24. In addition, since the size of the avoidance hole 24 is smaller than the size of the movable mating groove 22, the impact on the structural strength of the die frame 2 can be reduced. At the same time, it can avoid the connector 411 from falling out of the avoidance hole 24, so as to improve the stability of the elastic reset assembly 41 after installation.

[0047] According to some embodiments of the present invention, a mating slot 32 is formed on the outer circumferential surface of the die sleeve 3, and the end of the connector 411 facing away from the die frame 2 is plugged into the mating slot 32. In other words, the mating slot 32 and the connector 411 are connected by plugging together. As a result, the die sleeve 3 and the connector 411 can be independently molded, which reduces the molding difficulty and facilitates the replacement of the die sleeve 3 or the connector 411, thereby reducing the cost of using the tapping fixture 100.

[0048] According to some embodiments of the present invention, the connecting handle 1 includes a slide rod 11 and a sleeve 12, the slide rod 11 is slidably provided in the sleeve 12 along the axial direction of the assembly hole 21, the die sleeve 3 is provided at one end of the slide rod 11 or the sleeve 12, a limit pin 13 is provided on one of the slide rod 11 and the sleeve 12, and the other of the slide rod 11 and the sleeve 12 is formed with a limit slot 111 extending along the axial direction of the assembly hole 21, and a portion of the limit pin 13 is slidably provided in the limit slot 111 along the axial direction of the assembly hole 21. Thus, through the sliding connection between the slide rod 11 and the sleeve 12, it is possible to better adapt to a processing method in which the axial position of the tapped workpiece remains stationary during the tapping process, such as when the slide rod 11 is fixed on the machine tool and the die sleeve 3 is connected to the sleeve 12, as the tapping continues, the die 200 moves on the workpiece to be tapped in a direction away from the slide rod 11. In addition, the cooperation between the limiting pin 13 and the limiting sliding groove 111 can prevent the sliding sleeve 12 from rotating relative to the sliding rod 11 while limiting the sliding stroke of the sliding sleeve 12 relative to the sliding rod 11 to prevent the sliding sleeve 12 from falling off the sliding rod 11.

[0049] In a specific example, the slide rod 11 is a Morse taper shank, the front end of the sleeve 12 is screwed to the die sleeve 3, and a plurality of chip leakage holes 121 arranged at intervals are formed on the outer peripheral surface of the sleeve 12 to facilitate the debris generated by tapping to fall through the chip leakage holes 121 on the sleeve 12. The limit pin 13 is set on the sleeve 12, and the limit slide groove 111 is formed on the outer peripheral surface of the slide rod 11, and the movable mating groove 22 has an opening open toward the sleeve 12. Specifically, in the process of installing the die sleeve 3 and the elastic reset mechanism 4 into the die frame 2, first, the multiple connecting members 411 are inserted into the multiple matching slots 32 on the outer peripheral surface of the die sleeve 3, and then the combined structure of the die sleeve 3 and the multiple connecting members 411 is respectively installed into the assembly hole 21 and the movable matching groove 22 from the side of the die frame 2 facing the sliding sleeve 12, and then the sliding sleeve 12 is fixed to the die frame 2. The connecting member 411 can be better limited from the side of the connecting member 411 facing the sliding sleeve 12 by the sliding sleeve 12 to prevent the connecting member 411 from falling out of the movable matching groove 22. Then, the two spring reset units 412 corresponding to each connecting member 411 are respectively installed in the installation grooves 23 on both sides.

[0050] The following describes a processing machine tool according to an embodiment of the second aspect of the present utility model with reference to the accompanying drawings.

[0051] The processing machine tool according to the embodiment of the second aspect of the present utility model includes: the above-mentioned tapping fixture 100.

[0052] According to the processing machine tool of the embodiment of the second aspect of the present invention, by arranging an elastic reset mechanism 4 between the die frame 2 and the die sleeve 3, when the centerline axis of the workpiece to be tapped is slightly eccentric relative to the central axis of the die frame 2, the die 200 installed in the die sleeve 3 can be moved to a position coaxial with the workpiece to be tapped, thereby flexibly dealing with the eccentricity problem of the workpiece to be tapped, so as to avoid tapping distortion and tooth rot caused by the deviation of the workpiece to be tapped relative to the central axis of the die 200. At the same time, the process of calibrating the workpiece to be tapped and the center of the die 200 is eliminated, which is beneficial to improving the tapping quality and efficiency of the tapping fixture 100.

[0053] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tapping fixture, characterized in that: include: Connecting handle; A die frame is provided on the connecting handle and is formed with an assembly hole; A die sleeve is provided in the assembly hole and is formed with a mounting hole, the diameter of the die sleeve is smaller than the inner diameter of the assembly hole, and the die is suitable for being installed in the mounting hole; An elastic reset mechanism is provided between the die sleeve and the die frame and is used for driving the central axis of the die sleeve to move toward the central axis of the die frame. The elastic reset mechanism includes a plurality of groups of elastic reset components arranged at circumferential intervals along the circumference of the assembly hole on the outer peripheral side of the die sleeve. The plurality of groups of elastic reset components include at least two groups for driving the central axis of the die sleeve to move along a first direction and a second direction toward the central axis of the die frame, respectively.

2. The tapping fixture according to claim 1, characterized in that: A plurality of groups of the elastic reset components are evenly spaced along the circumference of the assembly hole.

3. The tapping fixture according to claim 1, characterized in that: The elastic reset assembly includes: a connecting piece and a spring reset unit. A plurality of movable matching grooves corresponding to the plurality of connecting pieces are formed on the inner circumferential surface of the assembly hole. One end of the connecting piece is movably arranged in the movable matching groove and the other end is connected to the die sleeve. The spring reset unit is provided with two spring reset units distributed on opposite sides of the connecting piece in the circumferential direction of the assembly hole and supported between the die frame and the connecting piece.

4. The tapping fixture according to claim 3, characterized in that: The die frame is also formed with mounting grooves located on opposite sides of the movable mating groove in the circumferential direction of the assembly hole and connected to the movable mating groove. The spring reset unit is arranged in the mounting groove and includes a movable pin and a reset spring. The movable pin is supported between the reset spring and the connecting piece, and the movable pin can slide along the extension direction of the mounting groove.

5. The tapping fixture according to claim 4, characterized in that: The contact surface between the movable pin and the connecting member is an arc surface; and / or, the end of the mounting groove away from the movable matching groove extends to the outer peripheral surface of the die frame, and the reset assembly also includes a fastener connected to the mounting groove, and the fastener is arranged on the side of the spring reset unit away from the movable pin.

6. The tapping fixture according to claim 3, characterized in that: An avoidance hole is formed on the outer peripheral surface of the die frame, which is opposite to and connected to the movable matching groove along the radial direction of the assembly hole, and the size of the avoidance hole is smaller than that of the movable matching groove.

7. The tapping fixture according to claim 3, characterized in that: A matching slot is formed on the outer peripheral surface of the die sleeve, and an end of the connecting piece facing away from the die frame is plugged into and matched with the matching slot.

8. The tapping fixture according to claim 1, characterized in that: The connecting handle includes a sliding rod and a sliding sleeve. The sliding rod is slidably arranged in the sliding sleeve along the axial direction of the assembly hole. The die sleeve is arranged at one end of the sliding rod or the sliding sleeve. A limiting pin is provided on one of the sliding rod and the sliding sleeve. A limiting groove is formed on the other of the sliding rod and the sliding sleeve and extends along the axial direction of the assembly hole. Part of the limiting pin is slidably arranged in the limiting groove along the axial direction of the assembly hole.

9. A processing machine tool, characterized in that: include: The tapping fixture according to any one of claims 1 to 8.

Images