Dovetail clamp

Abstract

The utility model relates to the technical field of clamps, in particular to a dovetail clamp which comprises an installation seat, the installation seat comprises a connecting face and an installation face which are opposite, the connecting face is used for being connected with an external connecting face, and the installation face is provided with at least one first installation portion and at least one second installation portion. The first mounting part and the second mounting part are arranged along a first direction; the clamp body is provided with a dovetail groove and a third mounting part corresponding to the first mounting part or / and a fourth mounting part corresponding to the second mounting part, and the clamp body is detachably connected with the mounting surface through fasteners arranged in the corresponding mounting parts in a penetrating mode. According to the dovetail clamp, the production efficiency and the quality of finished products can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of jigs, in particular to a dovetail jig. Background Art

[0002] With the development of the industry, people's demands for products are becoming more and more diverse. Taking a certain product as an example, its models can reach dozens. When processing this kind of product, it is necessary to first use a dovetail jig to fix the workpiece to be processed, and then carry out corresponding processing on it.

[0003] Due to the numerous models of products, when facing products of different models, corresponding models of dovetail jigs need to be used for fixation to ensure the quality of finished products and production efficiency. If a single model of dovetail jig is used to match workpieces of different sizes, when processing a specific angle, the jig often gets in the way, it is not easy for the tool to cut, or the tool needs to be very long to cut, which affects the rigidity of the product. Specifically in the production process, it is necessary to fix a dovetail jig on the workbench surface. After completing the processing of products of the corresponding model, disassemble and replace it with another dovetail jig, and then carry out corresponding processing.

[0004] However, for existing dovetail jigs of different models, not only the sizes of their dovetail grooves are different, but also the structures for fixedly connecting with the workbench surface are different. This results in a more cumbersome process for replacing the dovetail jig, affecting production efficiency, and prone to positioning errors, which affects the quality of finished products. Summary of the Utility Model

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the fact that the fixed connection structures of existing dovetail jigs of different models are different, resulting in affecting production efficiency and the quality of finished products when replacing, and to provide a dovetail jig that can improve production efficiency and the quality of finished products.

[0006] The utility model provides a dovetail jig, which includes a mounting base. The mounting base includes a connection surface and a mounting surface that face away from each other. The connection surface is used to connect to an external connection surface. At least one first mounting portion and at least one second mounting portion are provided on the mounting surface. The first mounting portion and the second mounting portion are arranged along a first direction; and a jig body. A dovetail groove is formed in the jig body, and a third mounting portion corresponding to the first mounting portion and / or a fourth mounting portion corresponding to the second mounting portion are provided. The jig body can be detachably connected to the mounting surface through a fastener passing through the corresponding mounting portion.

[0007] In an embodiment of the utility model, a first positioning portion is further provided on the mounting surface, and a second positioning portion corresponding to the first positioning portion is formed in the jig body. The second positioning portion is in clearance fit with the first positioning portion.

[0008] In an embodiment of the present utility model, the first positioning portion is disposed at the center of the mounting surface. The first positioning portion includes a first positioning member and a second positioning member that are spaced apart along the first direction. The second positioning portion includes a first positioning hole corresponding to the first positioning member and a second positioning hole corresponding to the second positioning member.

[0009] In an embodiment of the present utility model, the first mounting portion is disposed between the first positioning member and the second positioning member. The second mounting portion is disposed on a side of the first positioning member away from the second positioning member along the first direction, or / and the second mounting portion is disposed on a side of the second positioning member away from the first positioning member along the first direction.

[0010] In an embodiment of the present utility model, the second mounting portion includes two second mounting holes, two third mounting holes, and two fourth mounting holes. The two second mounting holes are respectively disposed on two sides of the first mounting portion. The two third mounting holes are respectively disposed on two sides of the first mounting portion and outside the second mounting holes. The two fourth mounting holes are respectively disposed on two sides of the first mounting portion and outside the third mounting holes.

[0011] In an embodiment of the present utility model, the radial dimension of the first mounting portion is not greater than the radial dimension of the second mounting portion.

[0012] In an embodiment of the present utility model, the radial dimension of the first positioning member is smaller than the radial dimension of the second positioning member.

[0013] In an embodiment of the present utility model, a pressing groove communicating with the dovetail groove is formed on the side wall of the jig body. A clamping recess is formed at an end of the pressing groove away from the dovetail groove. The dovetail jig further includes a pressing member that can be detachably disposed in the pressing groove. The pressing member includes a dovetail pressing portion, a main body portion, and a clamping convex portion that are connected in sequence. The dovetail pressing portion is used to press a workpiece disposed in the dovetail groove. The clamping convex portion is in clamping connection with the clamping recess.

[0014] In an embodiment of the present utility model, an avoidance inclined surface is provided at the top of the dovetail pressing portion.

[0015] In an embodiment of the present utility model, the mounting seat includes a seat body portion, a connecting portion, and a bearing portion that are connected in sequence. The connecting surface is provided on a side of the seat body portion away from the connecting portion. The mounting surface is provided on a side of the bearing portion away from the connecting portion.

[0016] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0017] The dovetail fixture described in the present utility model includes a mounting base and a fixture body. When in use, different models of fixture bodies can be assembled with the same mounting base to fix workpieces of different models. Through the corresponding mounting parts on the mounting base and the fixture body, the installation and disassembly of the fixture body and the mounting base can be conveniently realized, effectively reducing the time wasted in actions such as replacing the fixture body and positioning, and improving the production efficiency of the overall production process. In addition, since the positions of the mounting parts on the mounting base are relatively fixed, the problem that the finished product quality is affected due to errors occurring during the positioning of the fixture body can be effectively reduced, and the yield rate of the finished product is effectively improved. Description of the Drawings

[0018] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model in combination with the drawings, wherein,

[0019] Figure 1 is a schematic structural diagram of the dovetail fixture in the preferred embodiment of the present utility model;

[0020] Figure 2 is an exploded structural diagram of the dovetail fixture in the preferred embodiment of the present utility model;

[0021] Figure 3 is a schematic structural diagram of the mounting surface in the preferred embodiment of the present utility model;

[0022] Figure 4 is one of the sectional structural diagrams of the dovetail fixture in the preferred embodiment of the present utility model;

[0023] Figure 5 is another sectional structural diagram of the dovetail fixture in the preferred embodiment of the present utility model;

[0024] Figure 6 is a third sectional structural diagram of the dovetail fixture in the preferred embodiment of the present utility model;

[0025] Figure 7 is a schematic structural diagram of the fixture body in the preferred embodiment of the present utility model;

[0026] Figure 8 is a fourth sectional structural diagram of the dovetail fixture in the preferred embodiment of the present utility model;

[0027] Figure 9 is a sectional structural diagram of the fixture body in the preferred embodiment of the present utility model;

[0028] Figure 10 is a schematic structural diagram of the mounting base in the preferred embodiment of the present utility model.

[0029] Description of the reference numerals in the drawings: D1, the first direction; 10, the mounting base; 11, the base body part; 111, the connecting surface; 12, the connecting part; 13, the bearing part; 131, the mounting surface; 132, the first mounting part; 133, the second mounting part; 1331, the second mounting hole; 1332, the third mounting hole; 1333, the fourth mounting hole; 134, the first positioning member; 135, the second positioning member; 21, the fixture body; 211, the dovetail groove; 212, the third mounting part; 213, the fourth mounting part; 214, the first positioning hole; 215, the second positioning hole; 216, the pressing groove; 2161, the clamping recess; 2162, the second mounting screw hole; 22, the pressing member; 221, the dovetail pressing part; 2211, the relief inclined surface; 222, the main body part; 2221, the first mounting screw hole; 223, the clamping convex part. Detailed implementation manners

[0030] The present utility model will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments given are not intended to limit the present utility model.

[0031] Referring to Figure 1 and Figure 2 as shown, the present utility model discloses a dovetail fixture, which comprises a mounting base 10 and a fixture body 21.

[0032] The mounting base 10 is used to connect an external component and the fixture body 21; the external component such as a workbench, a five-axis robot, etc. The mounting base 10 includes opposite connecting surfaces 111 and mounting surfaces 131. The connecting surface 111 is used to connect an external connecting surface. At least one first mounting portion 132 and at least one second mounting portion 133 are provided on the mounting surface 131. The first mounting portion 132 and the second mounting portion 133 are used to connect the fixture body 21, so as to adapt different models of fixture bodies 21 through the mounting base 10. It should be noted that when dealing with different fixture bodies 21, the first mounting portion 132 and the second mounting portion 133 are not necessarily used simultaneously, but can be selectively used according to the corresponding fixture body 21. The first mounting portion 132 and the second mounting portion 133 are arranged along the first direction D1 to improve the space utilization rate and reduce the volume of the mounting base 10. Those skilled in the art can set the specific number of the first mounting portion 132 and the second mounting portion 133 according to actual needs; preferably, only one first mounting portion 132 is provided, and multiple second mounting portions 133 are provided to meet the connection requirements of different models of fixture bodies 21. Those skilled in the art can set the specific structures of the first mounting portion 132 and the second mounting portion 133 according to actual needs. For example, the first mounting portion 132 and the second mounting portion 133 are set as threaded holes, which are threadedly connected with components such as bolts and screws to connect the fixture body 21; or, the first mounting portion 132 and the second mounting portion 133 are set as blind holes, and magnets or components that can be adsorbed by magnets are arranged therein to cooperate with components that can be adsorbed by magnets or magnets to connect the fixture body 21, etc.

[0033] The fixture body 21 is used to fix a workpiece. Those skilled in the art can set the number of fixture bodies 21 according to actual needs. Preferably, multiple fixture bodies 21 are provided, and each fixture body 21 corresponds to a different model to meet the fixing requirements for different models of workpieces.

[0034] A dovetail groove 211 is formed on the fixture body 21; the dovetail groove 211 belongs to the prior art and is a dovetail-shaped structure for fixing a workpiece. Those skilled in the art can set the specific dimensions, dovetail angles, etc. of the dovetail groove 211 according to actual needs to adapt to the corresponding model of the workpiece. Preferably, the dovetail groove 211 is formed along the first direction D1.

[0035] The fixture body 21 is also provided with a third mounting portion 212 corresponding to the first mounting portion 132 and / or a fourth mounting portion 213 corresponding to the second mounting portion 133. Specifically, on some models of the fixture body 21, only the third mounting portion 212 corresponding to the first mounting portion 132 is provided; on some models of the fixture body 21, only the fourth mounting portion 213 corresponding to the second mounting portion 133 is provided; on some models of the fixture body 21, both the third mounting portion 212 and the fourth mounting portion 213 are provided. Those skilled in the art can set the specific structures of the third mounting portion 212 and the fourth mounting portion 213 according to actual needs. For example, when the first mounting portion 132 and the second mounting portion 133 are set as threaded holes, the third mounting portion 212 and the fourth mounting portion 213 are also set as threaded holes; or, both are set as blind holes to install magnets or components that can be adsorbed by magnets, etc.

[0036] The fixture body 21 can be detachably connected to the mounting surface 131 through fasteners passing through the corresponding mounting portions, ensuring that when in use, the two are relatively fixed to fix the workpiece and realize the processing of the workpiece; after the processing of the workpiece of the corresponding model is completed, the current fixture body 21 is removed, the fixture body corresponding to the next model of the workpiece is replaced, and then the processing is carried out correspondingly.

[0037] Specifically, when installing the fixture body 21 with only the third mounting portion 212 and the mounting seat 10, fasteners are arranged in the first mounting portion 132 and the third mounting portion 212; when installing the fixture body 21 with only the fourth mounting portion 213 and the mounting seat 10, fasteners are arranged in the second mounting portion 133 and the fourth mounting portion 213; when installing the fixture body 21 with both the third mounting portion 212 and the fourth mounting portion 213, fasteners can be arranged in the first mounting portion 132 and the third mounting portion 212, or in the second mounting portion 133 and the fourth mounting portion 213, or fasteners are arranged in each mounting portion. Those skilled in the art can set the specific opening positions of the third mounting portion 212 and the fourth mounting portion 213 according to actual needs, as long as the detachable connection between the fixture body 21 and the mounting seat 10 can be realized. Those skilled in the art can set the fasteners according to actual needs, such as bolts, magnets, etc.

[0038] When processing, first fix the mounting seat 10 and external components. Subsequently, according to the model of the workpiece to be processed currently, select a suitable fixture body 21. Place the fixture body 21 on the mounting surface 131 of the mounting seat 10, and then set fasteners in the corresponding mounting portions to relatively fix the fixture body 21 and the mounting seat 10. Then the workpiece can be set and processed. After the processing of the workpiece of this model is completed, remove the current fixture body 21, select the fixture body 21 of the corresponding model according to the next workpiece, and repeat the corresponding actions to realize the processing.

[0039] The dovetail fixture described in the present utility model includes a mounting base 10 and a fixture body 21. When in use, different models of fixture bodies 21 can be assembled with the same mounting base 10 to fix workpieces of different models. Through the corresponding mounting parts on the mounting base 10 and the fixture body 21, the installation and disassembly of the fixture body 21 and the mounting base 10 can be conveniently realized, effectively reducing the time wasted in actions such as replacing the fixture body 21 and positioning, and improving the production efficiency of the overall production process. In addition, since the positions of the mounting parts on the mounting base 10 are relatively fixed, the problem of affecting the quality of the finished product due to errors occurring during the positioning of the fixture body 21 can be effectively reduced, and the yield of the finished product is effectively improved.

[0040] Refer to Figure 2 and Figure 3 As shown, in some embodiments of the dovetail fixture described in the present utility model, a first positioning part is further provided on the mounting surface 131, and a second positioning part corresponding to the first positioning part is provided on the fixture body 21. The second positioning part and the first positioning part are in clearance fit. Those skilled in the art can set the first positioning part and the second positioning part according to actual needs so that the two can be in clearance fit to achieve the positioning during the installation process of the fixture body 21. For example, one of the first positioning part and the second positioning part can be set as a positioning pin, and the other can be set as a positioning hole. By setting this structure, the fixture body 21 is positioned through the corresponding positioning parts during the installation process, facilitating quick installation and improving efficiency; at the same time, the position accuracy is further ensured.

[0041] Furthermore, refer to Figures 2 to 6 As shown, in some embodiments of the dovetail fixture described in the present utility model, the first positioning part is provided at the center of the mounting surface 131 to facilitate the positioning and assembly of the fixture body 21. Among them, the first positioning part includes a first positioning member 134 and a second positioning member 135 arranged at intervals along the first direction D1. Preferably, both the first positioning member 134 and the second positioning member 135 are set as positioning pins, and corresponding positioning holes are provided on the mounting surface 131. The first positioning member 134 and the second positioning member 135 are both arranged in the positioning holes. The second positioning part includes a first positioning hole 214 corresponding to the first positioning member 134 and a second positioning hole 215 corresponding to the second positioning member 135. When in use, the first positioning hole 214 is aligned with the first positioning member 134, and the second positioning hole 215 is aligned with the second positioning member 135 to position and assemble the fixture body 21. Subsequently, the fixture body 21 and the mounting base 10 are fixed through fasteners. By setting this structure, the positioning and assembly of the fixture body 21 can be more stable, avoiding problems such as relative misalignment when the fasteners are not assembled, so as to improve the assembly efficiency.

[0042] Furthermore, refer to Figures 2 to 6As shown, in some embodiments of the dovetail fixture of the present utility model, the first mounting portion 132 is disposed between the first positioning member 134 and the second positioning member 135, and the second mounting portion 133 is disposed on one side of the first positioning member 134 away from the second positioning member 135 along the first direction D1, or / and the second mounting portion 133 is disposed on one side of the second positioning member 135 away from the first positioning member 134 along the first direction D1. By providing this structure, it is possible to facilitate the installation and fixation of some small-sized fixture bodies 21 through the first mounting portion 132, while the large-sized fixture bodies 21 are installed and fixed through the second mounting portion 133, or through the first mounting portion 132 and the second mounting portion 133 together, effectively meeting the installation and fixation requirements of different models of fixture bodies 21. Preferably, there are multiple second mounting portions 133, and the second mounting portions 133 are provided on both the side of the first positioning member 134 away from the second positioning member 135 along the first direction D1 and the side of the second positioning member 135 away from the first positioning member 134 along the first direction D1 to strengthen the installation and fixation effect.

[0043] Further, referring to Figures 2 to 6 As shown, in some embodiments of the dovetail fixture of the present utility model, the second mounting portion 133 includes two second mounting holes 1331, two third mounting holes 1332, and two fourth mounting holes 1333. The two second mounting holes 1331 are respectively disposed on both sides of the first mounting portion 132, the two third mounting holes 1332 are respectively disposed on both sides of the first mounting portion 132 and outside the second mounting holes 1331, and the two fourth mounting holes 1333 are respectively disposed on both sides of the first mounting portion 132 and outside the third mounting holes 1332. Those skilled in the art can set the distance between adjacent mounting holes according to actual needs, which will not be elaborated here. During use, it is possible to facilitate different models of fixture bodies 21 to select corresponding mounting holes to set fasteners for installation and fixation, thus meeting the installation and fixation requirements of various models of fixture bodies 21.

[0044] Further, referring to Figure 3 As shown, in some embodiments of the dovetail fixture of the present utility model, the radial dimension H1 of the first mounting portion 132 is not greater than the radial dimension of the second mounting portion 133. The first mounting portion 132 is generally applicable to the installation and fixation of small-sized fixture bodies 21. Such fixture bodies 21 are small in volume and limited in space. Therefore, by restricting the radial dimension H1 of the first mounting portion 132, it is possible to adapt to small-sized fixture bodies 21. Preferably, the radial dimension H1 of the first mounting portion 132 is equal to the radial dimension H2 of the second mounting hole 1331, the radial dimension H2 of the second mounting hole 1331 is less than the radial dimension H3 of the third mounting hole 1332, and the radial dimension H3 of the third mounting hole 1332 is equal to the radial dimension H4 of the fourth mounting hole 1333.

[0045] Further, referring toFigure 3 As shown, in some embodiments of the dovetail clamp of the present invention, the radial dimension d1 of the first positioning member 134 is smaller than the radial dimension d2 of the second positioning member 135. By setting this structure, a good positioning effect can be ensured, and a certain foolproof effect can be achieved to prevent the clamp body 21 from being reversely installed.

[0046] Reference Figures 7 to 9 As shown, in some embodiments of the dovetail clamp described in the utility model, a clamp body 21 is provided with a clamping groove 216 connected to the dovetail groove 211 on the side wall thereof, so as to be used for setting the clamping component 22 to fix the workpiece. The clamping groove 216 is provided with a clamping recess 2161 at one end away from the dovetail groove 211, so as to be clamped and fixed with the clamping protrusion 223 of the clamping component 22. Preferably, when a plurality of clamping grooves 216 are provided, the clamping recess 2161 is cut out by wire cutting, so as to improve the production efficiency of the clamp body 21.

[0047] The dovetail clamp also includes a clamping component 22, which is detachably disposed in the clamping groove 216. The clamping component 22 includes a dovetail clamping portion 221, a main body 222, and a clamping protrusion 223 that are connected in sequence. The dovetail clamping portion 221 is used to clamp the workpiece disposed in the dovetail groove 211, and the clamping protrusion 223 is clamped and connected with the clamping recess 2161. Preferably, the size of the clamping protrusion 223 is smaller than the size of the clamping recess 2161, so that the clamping component 22 can move within a certain range when it is not locked, so as to better clamp the workpiece. Those skilled in the art can set a specific detachable connection method according to actual needs; preferably, a first mounting screw hole 2221 is provided on the main body 222, and a second mounting screw hole 2162 corresponding to the first mounting screw hole 2221 is provided on the clamp body 21, so as to achieve a detachable connection between the two by screws. Those skilled in the art can set the number of the clamping groove 216 and the clamping component 22 according to actual needs; preferably, both are provided in plurality, so as to better position and clamp the workpiece. When in use, the workpiece is fixed to the dovetail groove 211, and the corresponding clamping component 22 is placed in the clamping groove 216. After the position of the clamping component 22 is adjusted, the screw is tightened to achieve clamping and fixing.

[0048] Further, see Figure 9 As shown, in some embodiments of the dovetail clamp of the present invention, a dovetail pressing part 221 is provided with an avoidance slope 2211 on the top. When the pressing part 22 is used to clamp and fix the workpiece, the pressing part 22 is inclined to a certain extent. By providing the avoidance slope 2211, the pressing part 22 will not be higher than the clamp body 21 and contact the workpiece.

[0049] Reference Figure 10As shown in the figure, in some embodiments of the dovetail fixture of the present utility model, the mounting base 10 includes a base body portion 11, a connecting portion 12, and a bearing portion 13 that are connected in sequence. A connecting surface 111 is provided on one side of the base body portion 11 facing away from the connecting portion 12, and a mounting surface 131 is provided on one side of the bearing portion 13 facing away from the connecting portion 12. Preferably, bolts are provided on the base body portion 11 for connection with external components. Preferably, the base body portion 11, the connecting portion 12, and the bearing portion 13 are all provided in a cylindrical structure, and the diameter of the connecting portion 12 is smaller than the diameter of the bearing portion 13, and the diameter of the bearing portion 13 is smaller than the diameter of the base body portion 11; preferably, the diameter at the connection between the connecting portion 12 and the bearing portion 13 gradually increases from the connecting portion 12 to the bearing portion 13 side. By setting this structure, good structural strength and connection effect can be ensured.

[0050] Working principle:

[0051] First, fix the mounting base 10 and the external components. Subsequently, select a suitable fixture body 21 according to the model of the workpiece to be processed currently. Place the fixture body 21 on the mounting surface 131 of the mounting base 10, and then set fasteners in the corresponding mounting parts to relatively fix the fixture body 21 and the mounting base 10.

[0052] Next, fix the workpiece in the dovetail groove 211, and place the corresponding pressing component 22 into the pressing groove 216. Adjust the pressing component 22 so that the dovetail pressing portion 221 and the dovetail groove 211 cooperate to fixedly clamp the workpiece. After the adjustment is completed, tighten the screws to lock the pressing component 22, and then the corresponding processing can be carried out.

[0053] After the processing of the workpiece of this model is completed, remove the current fixture body 21, select the corresponding model of the fixture body 21 according to the workpiece of the next model, and then repeat the corresponding actions to achieve processing.

[0054] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A dovetail clamp, characterized in that: include: A mounting seat, the mounting seat comprising a connecting surface and a mounting surface facing each other, the connecting surface being used to connect to an external connecting surface, the mounting surface being provided with at least one first mounting portion and at least one second mounting portion, the first mounting portion and the second mounting portion being arranged along a first direction; and A clamp body is provided with a dovetail groove, a third mounting portion corresponding to the first mounting portion and / or a fourth mounting portion corresponding to the second mounting portion, and the clamp body is detachably connected to the mounting surface by fasteners penetrated through the corresponding mounting portions.

2. The dovetail clamp according to claim 1, characterized in that: The mounting surface is also provided with a first positioning portion, the fixture body is provided with a second positioning portion corresponding to the first positioning portion, and the second positioning portion is clearance-matched with the first positioning portion.

3. The dovetail clamp according to claim 2, characterized in that: The first positioning portion is disposed at the center of the mounting surface, the first positioning portion includes a first positioning member and a second positioning member spaced apart along the first direction, and the second positioning portion includes a first positioning hole corresponding to the first positioning member and a second positioning hole corresponding to the second positioning member.

4. The dovetail clamp according to claim 3, characterized in that: The first mounting portion is arranged between the first positioning member and the second positioning member, the second mounting portion is arranged on a side of the first positioning member away from the second positioning member along the first direction, or / and the second mounting portion is arranged on a side of the second positioning member away from the first positioning member along the first direction.

5. The dovetail clamp according to claim 4, characterized in that: The second mounting portion includes two second mounting holes, two third mounting holes and two fourth mounting holes, the two second mounting holes are respectively arranged on both sides of the first mounting portion, the two third mounting holes are respectively arranged on both sides of the first mounting portion and on the outside of the second mounting holes, and the two fourth mounting holes are respectively arranged on both sides of the first mounting portion and on the outside of the third mounting holes.

6. The dovetail clamp according to claim 4 or 5, characterized in that: The radial dimension of the first mounting portion is not greater than the radial dimension of the second mounting portion.

7. The dovetail clamp according to claim 3, characterized in that: The radial dimension of the first positioning member is smaller than the radial dimension of the second positioning member.

8. The dovetail clamp according to claim 1, characterized in that: A clamping groove connected to the dovetail groove is formed on the side wall of the clamp body, and a clamping recess is formed at one end of the clamping groove away from the dovetail groove; The dovetail clamp also includes a clamping component, which is detachably arranged in the clamping groove. The clamping component includes a dovetail clamping portion, a main body portion and a clamping protrusion connected in sequence. The dovetail clamping portion is used to clamp a workpiece arranged in the dovetail groove, and the clamping protrusion is clamped and connected with the clamping recess.

9. The dovetail clamp according to claim 8, characterized in that: The top of the dovetail pressing portion is provided with an avoidance slope.

10. The dovetail clamp according to claim 1, characterized in that: The mounting seat comprises a seat body portion, a connecting portion and a bearing portion which are connected in sequence, the connecting surface is arranged on a side of the seat body portion away from the connecting portion, and the mounting surface is arranged on a side of the bearing portion away from the connecting portion.

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