Automatic centering flat tongs

Abstract

The utility model relates to the technical field of tool equipment, and discloses a pair of automatic centering flat tongs which comprises a tong body, a fixed tong block arranged on the tong body, a movable tong block arranged on the tong body and a driving part arranged on the tong body and used for driving the movable tong block to move in the direction close to or away from the fixed tong block. The fixing pieces are arranged on one of the fixed clamp block and the movable clamp block or the other two or one of the fixed clamp block and the movable clamp block, when a workpiece is clamped, the fixing pieces abut against the circumferential face of the workpiece, the center of the workpiece is located on the central axis of the clamp body, and therefore automatic centering of the workpiece is achieved, the centering difficulty of the workpiece is greatly reduced, and the centering efficiency of the workpiece is improved. And therefore, the workpiece clamping efficiency is improved, and the workpiece machining efficiency is improved.

Description

Technical Field

[0001] This application belongs to the technical field of tooling equipment, and particularly relates to an automatic centering vise. Background Art

[0002] A vise, also known as a machine vise, is a general-purpose fixture. It is a random accessory for milling machines and drilling machines. It is fixed on the workbench of the machine tool and used to clamp workpieces for machining.

[0003] Currently, when using a vise to clamp a workpiece, the workpiece needs to be first placed in the jaws, and then the workpiece needs to be adjusted so that the center of the workpiece coincides with the machining center of the processing equipment to improve the machining quality of the workpiece. Especially when drilling the workpiece, the installation position of the workpiece is more demanding. However, when adjusting the workpiece, since the vise and the processing equipment do not have a reference object, it is necessary to adjust the workpiece multiple times, resulting in a low clamping efficiency of the workpiece, and thus affecting the machining efficiency of the workpiece. Summary of the Utility Model

[0004] This application provides an automatic centering vise to improve the clamping efficiency of workpieces and thus improve the machining efficiency of workpieces.

[0005] The technical solution adopted in this application is as follows:

[0006] An automatic centering vise includes a vise body, a fixed jaw block provided on the vise body, a movable jaw block provided on the vise body, and a driving member provided on the vise body for driving the movable jaw block to move in a direction approaching or away from the fixed jaw block. Fixing members are provided on both the fixed jaw block and the movable jaw block. The fixing members are provided on one of the fixed jaw block and the movable jaw block, two on the other, or one. When clamping a workpiece, a plurality of the fixing members are all pressed against the circumferential surface of the workpiece and the center of the workpiece is located on the central axis of the vise body.

[0007] By adopting the above technical solution, when using the automatic centering vise in this application to fix a workpiece, first fix the vise body on the processing equipment, and at the same time, the machining center of the processing equipment is located on the central axis of the vise body. Then place the workpiece on the fixed jaw block and the movable jaw block, and at the same time make the workpiece contact the fixing member on the fixed jaw block. Then rotate the driving member, and then the driving member drives the movable jaw block, so that the movable jaw block drives the fixing member on itself to move in a direction approaching the fixed jaw block. Finally, the fixing member on the movable jaw block is pressed against the circumferential surface of the workpiece, and the center of the workpiece is located on the central axis of the vise body, thereby realizing automatic centering of the workpiece, greatly reducing the centering difficulty of the workpiece, and thus improving the clamping efficiency of the workpiece to improve the machining efficiency of the workpiece.

[0008] Optionally, two of the fixing members are provided on the fixed jaw block, and one of the fixing members is provided on the movable jaw block. The two fixing members provided on the fixed jaw block are symmetrically arranged with respect to the central axis of the jaw body, and the one fixing member provided on the movable jaw block is located on the central axis of the jaw body.

[0009] By adopting the above technical solution, since the two fixing members provided on the fixed jaw block are symmetrically arranged with respect to the central axis of the jaw body, and the one fixing member provided on the movable jaw block is located on the central axis of the jaw body, when the movable jaw block drives the fixing member on itself to clamp the workpiece, the three fixing members can adjust the workpiece so that the center of the workpiece is located on the central axis of the jaw body, thereby realizing automatic centering of the workpiece, further improving the clamping efficiency of the workpiece, and further improving the processing efficiency of the workpiece.

[0010] Optionally, two of the fixing members are provided on the fixed jaw block, and two of the fixing members are provided on the movable jaw block. The two fixing members provided on the fixed jaw block are symmetrically arranged with respect to the central axis of the jaw body, and the two fixing members provided on the movable jaw block are symmetrically arranged with respect to the central axis of the jaw body.

[0011] By adopting the above technical solution, since the two fixing members on the movable jaw block are symmetrically arranged with respect to the central axis of the jaw body, and the two fixing members on the fixed jaw block are also symmetrically arranged with respect to the central axis of the jaw body, when the movable jaw block drives the fixing member on itself to clamp and fix the workpiece, the four fixing members can adjust the workpiece to realize automatic centering of the workpiece, thereby improving the clamping efficiency of the workpiece and further improving the processing efficiency of the workpiece.

[0012] Optionally, the fixing member has a fixing section that can be pressed against the workpiece, and the fixing section has a contact arc surface that can contact the workpiece.

[0013] By adopting the above technical solution, since the fixed end has a contact arc surface that can contact the workpiece, the friction between the fixing member and the workpiece is reduced, so as to avoid jamming between the two, making the process of the movable jaw block driving the fixing member to clamp and fix the workpiece and adjust more smooth, further improving the centering effect of the workpiece, and thus ensuring the processing quality and processing efficiency of the workpiece.

[0014] Optionally, each of the fixing members includes a connecting section and a fixing section. The fixed jaw block and the movable jaw block are respectively provided with connecting holes corresponding to the connecting section, and the connecting section passes through the connecting holes.

[0015] By adopting the above technical solution, since the connecting section is inserted into the connecting hole, the fixing member can be detachably connected to the fixed clamping block and the movable clamping block, so as to replace the deformed or damaged fixing member, thereby ensuring the clamping and centering effect of the self-centering parallel jaw vice on the workpiece.

[0016] Optionally, each of the fixing members further includes an extension section extending horizontally, one end of the extension section is connected to the connecting section, and the other end of the extension section is connected to the fixed section.

[0017] By adopting the above technical solution, since each fixing member further includes an extension section extending horizontally, the parallel jaw vice can clamp and fix and center-adjust larger-sized workpieces, so as to increase the applicable range of the parallel jaw vice, and further increase the flexibility of the parallel jaw vice.

[0018] Optionally, the cross-sectional shape of the connecting hole is circular, so that the connecting section can rotate relative to the hole wall of the connecting hole.

[0019] By adopting the above technical solution, since the cross-sectional shape of the connecting hole is circular, when clamping and fixing the workpiece, the connecting section can rotate relative to the connecting hole, so that the fixing member automatically adjusts the position where it abuts against the workpiece, so as to achieve the effect of accurately centering the workpiece, and further improve the processing quality of the workpiece.

[0020] Optionally, both the fixed clamping block and the movable clamping block are provided with support ribs extending upward, and the support ribs protrude from the top surface of the extension section.

[0021] By adopting the above technical solution, since both the fixed clamping block and the movable clamping block are provided with support ribs extending upward, and the support ribs protrude from the top surface of the extension section, the support ribs can support the workpiece, so as to avoid the situation where the extension section contacts the workpiece and causes a large friction force between the fixing member and the workpiece, thereby reducing the friction force between the fixing member and the workpiece, and further increasing the centering effect of adjusting the workpiece.

[0022] Optionally, the support ribs are located inside the extension section.

[0023] By adopting the above technical solution, since the support ribs are located inside the extension section, the support ribs can form an avoidance with the extension section, so as to avoid the situation where the support ribs affect the swing range of the extension section, thereby ensuring the size of the workpiece that the self-centering parallel jaw vice can clamp, and at the same time ensuring that when the self-centering parallel jaw vice clamps and adjusts the workpiece, the workpiece can abut against the support ribs to ensure the adjustment effect on the workpiece.

[0024] Optionally, the extension section is horizontally provided with a support section, and the support section is provided with a reinforcing rod, and the reinforcing rod is connected to the fixed section.

[0025] By adopting the above technical solution, since the reinforcing rod is connected to the fixed section, the reinforcing section can support the fixed section under the action of the supporting section, so as to increase the stability of the fixed section, thereby avoiding the possible bending of the fixed section when clamping the workpiece, and further ensuring the clamping and fixing effect of the workpiece.

[0026] Due to the adoption of the above technical solution, the beneficial effects obtained by this application are as follows:

[0027] 1. The automatic centering vise in this application includes a vise body, a fixed vise block arranged on the vise body, a movable vise block arranged on the vise body, and a driving member arranged on the vise body for driving the movable vise block to move in a direction close to or away from the fixed vise block. Both the fixed vise block and the movable vise block are provided with fixing members. The fixing members are arranged on one of the two of the fixed vise block and the movable vise block, on two of the other two, or on one. When clamping the workpiece, multiple fixing members are all pressed against the circumferential surface of the workpiece and make the center of the workpiece located on the central axis of the vise body. When using the automatic centering vise in this application to fix the workpiece, first fixedly install the vise body on the processing equipment, and at the same time, the processing center of the processing equipment is located on the central axis of the vise body. Then place the workpiece on the fixed vise block and the movable vise block, and at the same time make the workpiece abut against the fixing member on the fixed vise block. Then rotate the driving member, and then the driving member drives the movable vise block, so that the movable vise block drives the fixing member on itself to move in a direction close to the fixed vise block. Finally, the fixing member on the movable vise block is pressed against the circumferential surface of the workpiece, and at the same time the center of the workpiece is located on the central axis of the vise body, thereby realizing the automatic centering of the workpiece, greatly reducing the centering difficulty of the workpiece, and further improving the clamping efficiency of the workpiece, so as to improve the processing efficiency of the workpiece.

[0028] 2. The fixed vise block in this application is provided with two fixing members, the movable vise block is provided with one fixing member, and the two fixing members arranged on the fixed vise block are symmetrically arranged about the central axis of the vise body. The one fixing member arranged on the movable vise block is located on the central axis of the vise body. Then, during the process of the movable vise block driving the fixing member on itself to clamp the workpiece, the three fixing members can adjust the workpiece so that the center of the workpiece is located on the central axis of the vise body, so as to realize the automatic centering of the workpiece, and further improve the clamping efficiency of the workpiece, so as to further improve the processing efficiency of the workpiece.

[0029] 3. The fixing member in this application has a fixed section that can be pressed against the workpiece, and the fixed section has a contact arc surface that can contact the workpiece, thereby reducing the friction between the fixing member and the workpiece, so as to avoid the occurrence of jamming between the two, making the process of the movable vise block driving the fixing member to clamp and adjust the workpiece smoother, so as to further improve the centering effect of the workpiece, and further ensuring the processing quality and processing efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are provided to further understand the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0031] Figure 1 is a schematic structural view of the automatic centering vise under an embodiment of the present application, wherein the dotted line represents the central axis of the vise body;

[0032] Figure 2 is a schematic structural view of the automatic centering vise from another perspective under an embodiment of the present application;

[0033] Figure 3 is a schematic structural view of the automatic centering vise from yet another perspective under an embodiment of the present application;

[0034] Figure 4 is a schematic structural view of the fixing member under an embodiment of the present application;

[0035] Figure 5 is a schematic structural view of the fixing member under another embodiment of the present application.

[0036] Reference numerals:

[0037] 1, vise body; 11, fixing block; 2, fixed vise block; 21, connection hole; 22, support rib; 3, movable vise block; 4, driving member; 5, fixing member; 51, fixing section; 52, connection section; 53, extension section; 531, support section; 532, strengthening rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail by way of examples in conjunction with the drawings of the specification.

[0039] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that, without conflict, the embodiments of the present application and the features in each embodiment may be combined with each other.

[0040] In addition, in the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0041] In the present application, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions 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 a suitable manner in any one or more embodiments or examples.

[0043] Refer to Figures 1 to 5 , an automatic centering vise is disclosed, which includes a vise body 1, a fixed jaw block 2 provided on the vise body 1, a movable jaw block 3 provided on the vise body 1, and a driving member 4 provided on the vise body 1 for driving the movable jaw block 3 to move in a direction approaching or away from the fixed jaw block 2. Both the fixed jaw block 2 and the movable jaw block 3 are provided with fixing members 5. The fixing members 5 are provided on one of the fixed jaw block 2 and the movable jaw block 3, on the other two of them, or one of them. When clamping a workpiece, a plurality of fixing members 5 all abut against the circumferential surface of the workpiece and make the center of the workpiece located on the central axis of the vise body 1.

[0044] When using the automatic centering vise in this application to fix a workpiece, first fix the vise body 1 on the processing equipment. At the same time, the processing center of the processing equipment is located on the central axis of the vise body 1, and adjust the installation position of the vise body 1 according to the size of the workpiece to be processed. Then, after the workpiece is installed on the automatic centering vise, the center of the workpiece coincides with the processing center of the processing equipment. Then place the workpiece on the fixed jaw 2 and the movable jaw 3, and at the same time make the workpiece contact the fixing part 5 on the fixed jaw 2. Then rotate the driving part 4, and then the driving part 4 drives the movable jaw 3, so that the movable jaw 3 drives the fixing part 5 on itself to move towards the direction close to the fixed jaw 2. Finally, the fixing part 5 on the movable jaw 3 presses tightly against the circumferential surface of the workpiece, and at the same time the center of the workpiece is located on the central axis of the vise body 1, thus realizing the automatic centering of the workpiece, greatly reducing the centering difficulty of the workpiece, and then improving the clamping efficiency of the workpiece to improve the processing efficiency of the workpiece.

[0045] It should be noted that for the automatic centering vise in this application, when processing multiple workpieces of the same model, only need to adjust the relative position between the vise body 1 and the processing equipment once, then it can be realized that after clamping multiple workpieces of the same model on the automatic centering vise, the center of the workpiece coincides with the center of the processing equipment, so as to greatly improve the clamping and centering efficiency of the workpiece, and then greatly improve the processing efficiency of the workpiece.

[0046] This application does not make a specific limitation on the set number of the fixing parts 5, and it can adopt any one of the following implementation manners:

[0047] Embodiment 1. In this embodiment, refer to Figure 1 and Figure 2 , the fixed jaw 2 is provided with two fixing parts 5, the movable jaw 3 is provided with one fixing part 5, and the two fixing parts 5 provided on the fixed jaw 2 are symmetrically arranged about the central axis of the vise body 1, and the one fixing part 5 provided on the movable jaw 3 is located on the central axis of the vise body 1.

[0048] That is to say, a total of three fixing parts 5 are provided, two of which are provided on the fixed jaw 2 and the other one is provided on the movable jaw 3.

[0049] Since the two fixing parts 5 provided on the fixed jaw 2 are symmetrically arranged about the central axis of the vise body 1, and the one fixing part 5 provided on the movable jaw 3 is located on the central axis of the vise body 1, then during the process that the movable jaw 3 drives the fixing part 5 on itself to clamp the workpiece, the three fixing parts 5 can adjust the workpiece so that the center of the workpiece is located on the central axis of the vise body 1, so as to realize the automatic centering of the workpiece, and then improve the clamping efficiency of the workpiece to further improve the processing efficiency of the workpiece. At the same time, the number of the fixing parts 5 is reduced to reduce the production cost of the automatic centering vise.

[0050] Embodiment 2: In this embodiment, the fixed jaw 2 is provided with two fixing members 5, and the movable jaw 3 is provided with two fixing members 5. The two fixing members 5 provided on the fixed jaw 2 are symmetrically arranged with respect to the central axis of the pliers body 1, and the two fixing members 5 provided on the movable jaw 3 are symmetrically arranged with respect to the central axis of the pliers body 1.

[0051] That is to say, a total of four fixing members 5 are provided. Two of the fixing members 5 are provided on the fixed jaw 2, and the other two fixing members 5 are provided on the movable jaw 3.

[0052] Since the two fixing members 5 on the movable jaw 3 are symmetrically arranged with respect to the central axis of the pliers body 1, and the two fixing members 5 on the fixed jaw 2 are also symmetrically arranged with respect to the central axis of the pliers body 1, when the movable jaw 3 drives the fixing members 5 on itself to clamp and fix the workpiece, the four fixing members 5 can adjust the workpiece to achieve automatic centering of the workpiece, thereby improving the clamping efficiency of the workpiece and further improving the processing efficiency of the workpiece. At the same time, the clamping and fixing points of the fixing members 5 on the workpiece are increased, thereby increasing the clamping and fixing effect of the automatic centering vise on the workpiece.

[0053] Embodiment 3: In this embodiment, the fixed jaw 2 is provided with one fixing member 5, and the movable jaw 3 is provided with two fixing members 5. The one fixing member 5 provided on the fixed jaw 2 is located on the central axis of the pliers body 1, and the two fixing members 5 provided on the movable jaw 3 are symmetrically arranged with respect to the central axis of the pliers body 1.

[0054] That is to say, a total of three fixing members 5 are provided. Two of the fixing members 5 are provided on the movable jaw 3, and the other fixing member 5 is provided on the fixed jaw 2.

[0055] In a preferred embodiment, referring to Figure 4 and Figure 5 , the fixing member 5 has a fixing section 51 that can abut against the workpiece. The fixing section 51 has a contact arc surface that can contact the workpiece, thereby reducing the friction between the fixing member 5 and the workpiece to avoid jamming between the two, so that the movable jaw 3 drives the fixing member 5 to clamp and fix the workpiece and the adjustment process is smoother, further improving the centering effect on the workpiece, and thus ensuring the processing quality and processing efficiency of the workpiece.

[0056] Preferably, the cross-section of the fixing section 51 perpendicular to its own axis is circular to form a contact arc surface. That is to say, the entire circumferential surface of the fixing section 51 is a contact arc surface to ensure the centering adjustment effect on the workpiece.

[0057] The present application does not specifically limit the structure of the fixing member 5, and it can adopt any one of the following embodiments:

[0058] Embodiment 1: In this embodiment, each fixing member 5 includes a connecting section 52 and a fixing section 51. The fixed jaw block 2 and the movable jaw block 3 are both provided with connecting holes 21 corresponding to the connecting section 52, and the connecting section 52 is inserted through the connecting holes 21.

[0059] It can be understood that the fixing member 5 is a straight rod structure, and one end of the straight rod structure is inserted into the connecting hole 21, so that the fixing member 5 can be detachably connected to the fixed jaw block 2 and the movable jaw block 3, so as to replace the deformed or damaged fixing member 5, thus ensuring the clamping and centering effect of the self-centering parallel jaw vice on the workpiece.

[0060] Embodiment 2: In this embodiment, referring to Figure 4 , each fixing member 5 includes a connecting section 52, a fixing section 51 and an extending section 53 extending horizontally. One end of the extending section 53 is connected to the connecting section 52, and the other end of the extending section 53 is connected to the fixing section 51. The fixed jaw block 2 and the movable jaw block 3 are both provided with connecting holes 21 corresponding to the connecting section 52, and the connecting section 52 is inserted through the connecting holes 21, thereby increasing the distance between the fixing members 5 provided on the movable jaw body 1 and the fixing members 5 provided on the fixed jaw body 1, so that the parallel jaw vice can clamp and fix and center-adjust larger-sized workpieces, so as to increase the applicable range of the parallel jaw vice, and further increase the flexibility of the parallel jaw vice.

[0061] Preferably, the extending section 53 is perpendicular to the fixing section 51 and the connecting section 52 to ensure the clamping effect and the centering adjustment effect on the workpiece.

[0062] Furthermore, the cross-sectional shape of the connecting hole 21 is circular, so that the connecting section 52 can rotate relative to the hole wall of the connecting hole 21.

[0063] Since the cross-sectional shape of the connecting hole 21 is circular, when clamping and fixing the workpiece, the connecting section 52 can rotate relative to the connecting hole 21, so that the fixing member 5 can automatically adjust the position where it abuts against the workpiece to achieve the effect of accurately centering the workpiece, thereby improving the processing quality of the workpiece.

[0064] Furthermore, referring to Figure 3 , the fixed jaw block 2 and the movable jaw block 3 both extend upward with support ribs 22, and the support ribs 22 protrude from the top surface of the extending section 53, so that the support ribs 22 can support the workpiece to avoid the situation where the extending section 53 contacts the workpiece and causes a large frictional force between the fixing member 5 and the workpiece, thereby reducing the frictional force between the fixing member 5 and the workpiece, and further increasing the centering adjustment effect on the workpiece.

[0065] Even further, referring to Figure 3, the support rib 22 is located inside the extension section 53, so that the support rib 22 can form an avoidance with the extension section 53 to prevent the support rib 22 from affecting the swing range of the extension section 53, thus ensuring the size of the workpiece that the automatic centering vise can clamp. At the same time, when the automatic centering vise clamps and adjusts the workpiece, the workpiece can abut against the support rib 22 to ensure the adjustment effect on the workpiece.

[0066] In a preferred embodiment, referring to Figure 5 , the extension section 53 is horizontally extended with a support section 531, and the support section 531 is provided with a reinforcing rod 532, and the reinforcing rod 532 is connected to the fixed section 51.

[0067] It can be understood that since the reinforcing rod 532 is connected to the fixed section 51, the support section 531, the reinforcing rod 532 and the fixed section 51 together form a triangle, so that the reinforcing section can support the fixed section 51 under the action of the support section 531 to increase the stability of the fixed section 51, thus preventing the fixed section 51 from being bent when clamping the workpiece, and further ensuring the clamping and fixing effect on the workpiece.

[0068] The structure of the driving member 4 in this application is not specifically limited. Preferably, referring to Figure 1 , Figure 2 and Figure 3 , the driving member 4 is a driving rod threadedly connected to the vise body 1, and the driving rod is rotatably connected to the movable jaw 3, so that when the driving rod rotates, the driving rod moves along its own axial direction, and then drives the movable jaw 3 to move in a direction close to or away from the fixed jaw 2.

[0069] Specifically, the vise body 1 is provided with a fixed block 11, and the driving rod is threadedly connected to the fixed block 11 to support the driving rod by the fixed block 11, so as to increase the clamping stability of the automatic centering vise for the workpiece.

[0070] In other embodiments, the driving member 4 can also be a cylinder, a hydraulic cylinder or an electric push rod provided on the vise body 1.

[0071] In this application, the parts not described can be realized by adopting or referring to the existing technologies.

[0072] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0073] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. An automatic centering vise, characterized in that, It includes a pliers body (1), a fixed jaw block (2) provided on the pliers body (1), a movable jaw block (3) provided on the pliers body (1), and a driving member (4) provided on the pliers body (1) for driving the movable jaw block (3) to move in a direction close to or away from the fixed jaw block (2). The fixed jaw block (2) and the movable jaw block (3) are both provided with fixing members (5). The fixing members (5) are provided on one of the fixed jaw block (2) and the movable jaw block (3) in two, on the other of the two in two or one. When clamping a workpiece, the plurality of fixing members (5) are all pressed against the circumferential surface of the workpiece and the center of the workpiece is located on the central axis of the pliers body (1).

2. The automatic centering vise according to claim 1, characterized in that, The fixed jaw block (2) is provided with two fixing members (5), the movable jaw block (3) is provided with one fixing member (5), and the two fixing members (5) provided on the fixed jaw block (2) are symmetrically arranged about the central axis of the pliers body (1), and one fixing member (5) provided on the movable jaw block (3) is located on the central axis of the pliers body (1).

3. The automatic centering vise according to claim 1, wherein, The fixed jaw block (2) is provided with two fixing members (5), the movable jaw block (3) is provided with two fixing members (5), and the two fixing members (5) provided on the fixed jaw block (2) are symmetrically arranged about the central axis of the pliers body (1), and the two fixing members (5) provided on the movable jaw block (3) are symmetrically arranged about the central axis of the pliers body (1).

4. The automatic centering parallel jaw vice according to claim 1, characterized in that, The fixing member has a fixing section (51) capable of pressing against the workpiece, and the fixing section (51) has a contact arc surface capable of contacting the workpiece.

5. The automatic centering vise according to claim 1, wherein Each fixing member (5) includes a connecting section (52) and a fixing section (51). The fixed jaw block (2) and the movable jaw block (3) are both provided with connecting holes (21) corresponding to the connecting section (52), and the connecting section (52) passes through the connecting holes (21).

6. The automatic centering vise according to claim 5, wherein, Each fixing member (5) further includes an extension section (53) extending horizontally. One end of the extension section (53) is connected to the connecting section (52), and the other end of the extension section (53) is connected to the fixing section (51).

7. The automatic centering vise according to claim 6, characterized in that, The cross-sectional shape of the connecting hole (21) is circular, so that the connecting section (52) can rotate relative to the hole wall of the connecting hole (21).

8. The automatic centering parallel-jaw vice according to claim 6, wherein, The fixed jaw block (2) and the movable jaw block (3) both extend upwardly with support ribs (22), and the support ribs (22) protrude from the top surface of the extension section (53).

9. The automatic centering vise according to claim 8, characterized in that, The support rib (22) is located inside the extension section (53).

10. The automatic centering vise according to claim 6, characterized in that, The extension section (53) extends horizontally with a support section (531), and the support section (531) is provided with a reinforcing rod (532), and the reinforcing rod (532) is connected to the fixing section (51).

Images