Four-jaw bidirectional self-centering chuck

Abstract

The four-jaw bidirectional self-centering chuck comprises a chuck base body and four adjusting clamping jaws, the four adjusting clamping jaws are distributed at the top of the chuck base body in a cross shape and located at the same height, and two adjusting screw rods which are distributed in a perpendicular and crossed mode are arranged in the chuck base body; external threads in opposite directions are arranged on the two sides of the adjusting screw rod by taking the center as a demarcation point, and the four adjusting clamping jaws are in threaded fit with the adjusting screw rod through adjusting sliding blocks respectively, so that when the adjusting screw rod is rotated, the two adjusting clamping jaws on the adjusting screw rod can be driven to synchronously do centripetal motion or centrifugal motion. According to the four-jaw bidirectional self-centering chuck, alignment is not needed during clamping, the dependence of the alignment link on the skills and the operation proficiency of staff can be reduced, the clamping efficiency can be effectively improved, and the operability and the universality are high.

Description

Technical Field

[0001] The utility model relates to the technical field of centering chucks, in particular to a four-jaw bidirectional self-centering chuck. Background Art

[0002] When turning irregularly shaped parts, the most commonly used clamping fixture is a four-jaw single-action chuck. During the process, workers use tools and measuring instruments to repeatedly adjust the position of each jaw, aligning the part and clamping it securely.

[0003] This clamping method has the problem of low clamping efficiency, and at the same time, it requires high skills of workers and also has the hidden danger of unstable clamping quality. Utility Model Content

[0004] The embodiment of the present application provides a four-jaw bidirectional self-centering chuck, which does not require alignment during clamping, can reduce the dependence of the alignment process on employee skills and operational proficiency, can effectively improve clamping efficiency, and has strong operability and versatility.

[0005] An embodiment of the present application provides a four-jaw bidirectional self-centering chuck, comprising a chuck base and four adjusting jaws, wherein the four adjusting jaws are distributed in a cross shape on the top of the chuck base and are located at the same height, and two adjusting screws distributed vertically and crosswise are provided in the chuck base, and the adjusting screw is provided with external threads in opposite directions on both sides with the center as the dividing point, wherein the four adjusting jaws are respectively engaged with the adjusting screw threads through an adjusting slider, so that when the adjusting screw is rotated, the two adjusting jaws thereon can be driven to synchronously perform centripetal or centrifugal motion.

[0006] In a possible implementation, the adjusting screw is a split screw, including a connecting sleeve and two split screws coaxially connected at both ends of the connecting sleeve.

[0007] In a possible implementation, vertically sliding arcuate grooves are correspondingly provided at the middle portions of the connecting sleeves on the two adjusting screws.

[0008] In a possible implementation, the portion of the connecting sleeve where the arc-shaped groove is formed is a solid structure.

[0009] In one possible implementation, a mounting groove is provided at the bottom of the chuck base, a fixing seat is installed at the bottom of the mounting groove, and the fixing seat is provided with a cross-shaped mounting hole that passes through from top to bottom. The connecting sleeves on the two adjusting screws are arranged in the fixing seat and face the cross-shaped mounting hole, and the adjusting screws vertically pass through the fixing seat.

[0010] In one possible implementation, the top surface of the adjusting slider is provided with a first connecting tooth, which is evenly distributed along the movement direction of the adjusting claw, and the bottom surface of the adjusting claw is provided with a second connecting tooth that cooperates with the first connecting tooth, and the adjusting claw and the adjusting slider are connected by screws.

[0011] In a possible implementation, a first limit groove is provided on the top of the adjusting slider, and the first limit groove extends along the movement direction of the adjusting claw and is close to the middle of the adjusting slider. A second limit groove corresponding to the first limit groove is provided at the bottom of the adjusting claw. The first limit groove and the second limit groove cooperate to form a special-shaped limit space, and a matching special-shaped limit block is provided in the special-shaped limit space. The screw vertically penetrates the adjusting claw and the special-shaped limit block and is screwed into the adjusting slider. The adjusting claw is provided with an adjustment hole that passes through from top to bottom and cooperates with the screw. The adjustment hole is opposite to the second limit groove and extends along the movement direction of the adjusting claw.

[0012] In a possible implementation, the special-shaped limiting space is a square space, the special-shaped limiting block is a square block, and there are two special-shaped limiting blocks, the two special-shaped limiting blocks are spaced apart along the movement direction of the adjusting claw, and there are two adjusting holes, which correspond to the two special-shaped limiting blocks respectively.

[0013] Beneficial effects: Compared with the prior art, the four-jaw bidirectional self-centering chuck provided by the present application is constructed by assembling the four adjusting jaws onto the two adjusting screws in a threaded manner, and the two sides of the adjusting screws have external threads in opposite directions, so that rotating any one of the adjusting screws can cause the two adjusting jaws on it to move centripetally or centrifugally synchronously, thereby eliminating the need for alignment when clamping the workpiece, reducing the dependence of the alignment process on employee skills and operational proficiency, and effectively improving clamping efficiency;

[0014] The split design of the adjusting screw can effectively reduce the production cost and facilitate assembly and maintenance. In addition, the design of the arc groove between the connecting sleeves can reduce the relative height difference between the adjusting sliders without hindering the free rotation of the two adjusting screws, thereby making the overall structure of the self-centering chuck more compact. In addition, the connecting sleeve is a solid structure at the position of the arc groove, which can effectively enhance the structural strength of the connecting sleeve and the adjusting screw as a whole, thereby extending the service life of the self-centering chuck.

[0015] The adjusting jaw and the adjusting slider are connected by a toothed structure, which makes it easy to adjust the initial position of the adjusting jaw. This can effectively increase the clamping stroke of the self-centering chuck and meet the clamping requirements of parts with different structural shapes, with a wide range of applications.

[0016] These and other purposes, features and advantages of the present invention are fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of the four-jaw bidirectional self-centering chuck of the present application is shown.

[0018] Figure 2 A schematic cross-sectional view of the four-jaw bidirectional self-centering chuck of the present application is shown.

[0019] Figure 3 A schematic diagram of the exploded structure of the four-jaw bidirectional self-centering chuck of the present application is shown.

[0020] Figure 4 A schematic diagram of the partial structure of the four-jaw bidirectional self-centering chuck of the present application is shown.

[0021] Figure 5 A schematic diagram of the bottom-up structure of the four-jaw bidirectional self-centering chuck of the present application is shown.

[0022] Figure 6 A schematic diagram of the structure of the mutual cooperation of the adjusting screws of the present application is shown. DETAILED DESCRIPTION

[0023] The following description is intended to disclose the present invention and enable those skilled in the art to implement the present invention. The preferred embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0024] Those skilled in the art should understand that, in the disclosure of the specification, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0025] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0026] refer to Figures 1 to 6The embodiment of the present application provides a four-jaw bidirectional self-centering chuck, comprising a chuck base 10 and four adjusting jaws 20, wherein the four adjusting jaws 20 are distributed in a cross shape on the top of the chuck base 10 and are located at the same height, and are used to cooperate with each other to clamp the workpiece 30 in the middle position, wherein two adjusting screws 11 distributed vertically and crosswise are provided in the chuck base 10, and the adjusting screw 11 is provided with external threads in opposite directions on both sides with the center as the dividing point, and in addition, the four adjusting jaws 20 are respectively threadedly engaged with the adjusting screw 11 through the adjusting slider 40, so as to When the adjusting screw 11 is rotated, the two adjusting claws 20 thereon can be driven to synchronously perform centripetal or centrifugal motion. That is to say, for the two adjusting screws 11, rotating any one of the adjusting screws 11 can drive the two adjusting claws 20 connected to the adjusting screw 11 to synchronously directional move closer or farther away. In this way, when clamping the workpiece 30, there is no need to perform alignment work, thereby reducing the dependence of the alignment link on employee skills and operational proficiency, greatly improving the clamping efficiency, and at the same time, the clamping position of the workpiece 30 has high consistency and stable repeatability, which can ensure the clamping quality.

[0027] In one embodiment, the adjusting screw 11 is a split screw, including a connecting sleeve 111 and two split screws 112 coaxially connected at both ends of the connecting sleeve 111, thereby effectively reducing the production cost of the adjusting screw 11 during actual processing, and also facilitating the rapid assembly, disassembly and subsequent maintenance of the adjusting screw 11 in the chuck base 10.

[0028] Further preferably, a vertically sliding arc groove 101 is correspondingly provided in the middle of the connecting sleeve 111 on the two adjusting screws 11. In this way, during the rotation of the two adjusting screws 11, the vertically sliding arc groove 101 will not affect the free rotation of the adjusting screw 11 on the one hand, and on the other hand, it can play a role of mutual limitation to prevent the adjusting screw 11 from axial stringing. The third aspect can also effectively reduce the relative height difference between the corresponding adjusting sliders 40 (that is, the relative height difference between the adjusting sliders 40 on the two adjusting screws 11) to ensure that the four adjusting claws 20 can be maintained at the same clamping height, so that the overall structure of the self-centering chuck is more compact and the operation is more stable.

[0029] Further preferably, the connecting sleeve 111 is a solid structure at the position where the arc groove 101 is opened, thereby effectively improving the structural strength of the connecting sleeve 111 at this position, further improving the effects of the above three aspects, and extending the service life of the self-centering chuck.

[0030] In one embodiment, the bottom of the chuck base 10 is provided with a mounting groove 102. A fixing seat 50 is mounted at the bottom of the mounting groove 102. The fixing seat 50 also has a cross-shaped mounting hole 501 extending vertically therethrough. The connecting sleeves 111 on the two adjusting screws 11 are disposed within the fixing seat 50 and face the cross-shaped mounting hole 501, thereby facilitating quick assembly, disassembly, and maintenance of the adjusting screws 11. The adjusting screws 11 extend vertically through the fixing seat 50.

[0031] In one embodiment, the top surface of the adjustment slider 40 is provided with first connecting teeth 41. The first connecting teeth 41 are evenly distributed along the movement direction of the adjustment jaw 20. At the same time, the bottom surface of the adjustment jaw 20 is provided with second connecting teeth that cooperate with the first connecting teeth 41. The adjustment jaw 20 and the adjustment slider 40 are connected by a screw 42. Therefore, based on the tooth-tooth matching relationship between the first connecting teeth 41 and the second connecting teeth, the initial position of the adjustment jaw 20 on the adjustment slider 40 can be accurately and stably adjusted. On the basis of adjusting the relative distance between the two adjustment jaws 20 in the same linear direction by the adjusting screw 11, the distance stroke between the two adjustment jaws 20 in the same linear direction can be further increased, that is, the clamping stroke of the self-centering chuck can be further increased, which can meet the clamping requirements of parts with different structural shapes and has a wide range of applications.

[0032] Further preferably, a first limit slot 401 is provided on the top of the adjusting slider 40, wherein the first limit slot 401 extends along the movement direction of the adjusting claw 20 and is close to the middle of the adjusting slider 40. Correspondingly, a second limit slot 201 corresponding to the first limit slot 401 is provided at the bottom of the adjusting claw 20. At the same time, the first limit slot 401 and the second limit slot 201 cooperate to form a special-shaped limit space, and a matching special-shaped limit block 43 is provided in the special-shaped limit space, thereby limiting the adjusting claw 20 in the vertical direction of the movement direction of the adjusting claw 20 through the cooperation of the special-shaped limit space and the special-shaped limit block 43, so that the accuracy of the movement direction of the adjusting claw 20 can be ensured when adjusting the initial position of the adjusting claw 20, which facilitates the rapid and accurate movement of the adjusting claw 20 on the adjusting slider 40. In addition, the screw 42 vertically penetrates the adjusting claw 20 and the special-shaped limit block 43, and is screwed into the adjusting slider 40. The adjusting claw 20 is provided with an adjusting hole 202 which passes through from top to bottom and cooperates with the screw 42. At the same time, the adjusting hole 202 is opposite to the second limiting groove 201 and extends along the movement direction of the adjusting claw 20, and is used to fix the adjusting claw 20 on the adjusting slider 40 after the adjusting claw 20 moves into position.

[0033] Further preferably, the special-shaped limiting space is a square space, and the special-shaped limiting block 43 is a square block, which has strong limiting stability and is easy to process and form. There are two special-shaped limiting blocks 43, and the two special-shaped limiting blocks 43 are spaced apart along the movement direction of the adjustment claw 20. Correspondingly, there are two adjustment holes 202, which correspond to the two special-shaped limiting blocks 43 respectively, for allowing two screws 42 to connect the two special-shaped limiting blocks 43 respectively. At the same time, the cooperation between the screws 42 and the adjustment holes 202 can also form a guiding effect, further strengthening the guiding effect when adjusting the initial position of the adjustment claw 20.

[0034] It should be noted that the terms "first" and "second" in this application are used for descriptive purposes only and do not indicate any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0035] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are provided for illustrative purposes only and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. Four-jaw bidirectional self-centering chuck, characterized by: It includes a chuck base and four adjusting jaws, wherein the four adjusting jaws are distributed in a cross shape on the top of the chuck base and are located at the same height, and two adjusting screws distributed vertically and crosswise are provided in the chuck base, and the adjusting screw is provided with external threads in opposite directions on both sides with the center as the dividing point, wherein the four adjusting jaws are respectively matched with the adjusting screw threads through the adjusting slider, so that when the adjusting screw is rotated, the two adjusting jaws on it can be driven to synchronously perform centripetal or centrifugal motion.

2. The four-jaw bidirectional self-centering chuck according to claim 1, characterized in that: The adjusting screw is a split screw, comprising a connecting sleeve and two split screws coaxially connected at both ends of the connecting sleeve.

3. The four-jaw bidirectional self-centering chuck according to claim 2, characterized in that: The middle parts of the connecting sleeves on the two adjusting screws are correspondingly provided with arc grooves for vertical sliding engagement.

4. The four-jaw bidirectional self-centering chuck according to claim 3, characterized in that: The connecting sleeve is of a solid structure at the portion where the arc-shaped groove is formed.

5. The four-jaw bidirectional self-centering chuck according to claim 2, characterized in that: A mounting groove is provided at the bottom of the chuck base, a fixing seat is installed at the bottom of the mounting groove, and a cross-shaped mounting hole is provided on the fixing seat that passes through the top and bottom. The connecting sleeves on the two adjusting screws are arranged in the fixing seat and face the cross-shaped mounting hole, and the adjusting screws vertically pass through the fixing seat.

6. The four-jaw bidirectional self-centering chuck according to claim 1, characterized in that: The top surface of the adjusting slider is provided with a first connecting tooth, which is evenly distributed along the movement direction of the adjusting claw. The bottom surface of the adjusting claw is provided with a second connecting tooth that matches the first connecting tooth, and the adjusting claw and the adjusting slider are connected by screws.

7. The four-jaw bidirectional self-centering chuck according to claim 6, characterized in that: A first limiting groove is provided on the top of the adjusting slider, and the first limiting groove extends along the movement direction of the adjusting claw and is close to the middle of the adjusting slider. A second limiting groove corresponding to the first limiting groove is provided on the bottom of the adjusting claw. The first limiting groove and the second limiting groove cooperate to form a special-shaped limiting space, and a matching special-shaped limiting block is provided in the special-shaped limiting space. The screw vertically penetrates the adjusting claw and the special-shaped limiting block and is screwed into the adjusting slider. The adjusting claw is provided with an adjustment hole that passes through from top to bottom and cooperates with the screw. The adjustment hole is opposite to the second limiting groove and extends along the movement direction of the adjusting claw.

8. The four-jaw bidirectional self-centering chuck according to claim 7, characterized in that: The special-shaped limiting space is a square space, the special-shaped limiting block is a square block, and there are two special-shaped limiting blocks, the two special-shaped limiting blocks are spaced apart along the movement direction of the adjusting claw, and there are two adjusting holes, which correspond to the two special-shaped limiting blocks respectively.

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