Clamping device based on outer side clamping

Abstract

The utility model relates to a clamping device based on outer side clamping, which has a first direction and a second direction which are perpendicular to each other, and comprises a base, a first clamping component and a second clamping component, the first clamping assembly comprises a left side clamping piece and a right side clamping piece. The second clamping assembly comprises a front side outer clamping piece and a rear side outer clamping piece. When the to-be-clamped piece is in a clamping state, the left side clamping piece, the right side clamping piece, the front side external clamping piece and the rear side external clamping piece are all clamped on the outer wall of the to-be-clamped piece; the left clamping piece and the right clamping piece are driven by a left power rod and a right power rod to slide, a left inclined groove and a right inclined groove are formed in the bottom of the left clamping piece and the bottom of the right clamping piece respectively, the left power rod is connected with a left driving piece, the left driving piece is connected into the left inclined groove in a sliding mode, and the right power rod is connected with a right driving piece. And the right driving piece is connected into the right inclined groove in a sliding manner. The clamping device is simple in structure and rapid to operate, and the clamping efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixtures, in particular to a clamping device based on outer clamping. Background Art

[0002] The clamping device is a commonly used positioning device in production and processing, used for clamping and positioning products to facilitate subsequent processing and assembly of products. The clamping device generally includes a driving member and a clamping arm, and the driving member drives the clamping arm to move to clamp the product. However, the existing clamping device has a complex structure and cumbersome operation, which increases the difficulty of positioning and clamping, increases the time required for positioning and clamping, reduces the clamping efficiency of the product, and thus affects the processing efficiency of the product and cannot meet the processing requirements. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the present utility model is to overcome the defect of the low clamping efficiency of the clamping device in the prior art.

[0004] To solve the above technical problem, the present utility model provides a clamping device based on outer clamping, having a first direction and a second direction perpendicular to each other, including,

[0005] A base;

[0006] A first clamping assembly, the first clamping assembly includes a left clamping member and a right clamping member that can move relative to each other along the first direction on the base;

[0007] A second clamping assembly, the second clamping assembly includes a front outer clamping member and a rear outer clamping member that can move relative to each other along the second direction on the base;

[0008] Wherein, when the workpiece to be clamped is in a clamped state, the left clamping member, the right clamping member, the front outer clamping member and the rear outer clamping member are all clamped on the outer wall of the workpiece to be clamped;

[0009] The left clamping member is driven by a left power rod to slide along the first direction on the base, the right clamping member is driven by a right power rod to slide along the first direction on the base, a left inclined groove is provided at the bottom of the left clamping member, a right inclined groove is provided at the bottom of the right clamping member, the left power rod is connected with a left driving member, the left driving member is slidably connected in the left inclined groove, the right power rod is connected with a right driving member, and the right driving member is slidably connected in the right inclined groove.

[0010] In an embodiment of the present utility model, the left clamping member includes a left seat body, the left seat body is driven by a left power rod to slide on the base along a first direction, a left clamping main body is connected to the left seat body, and the left clamping main body is used to abut against the outer wall of the workpiece to be clamped. The right clamping member includes a right seat body, the right seat body is driven by a right power rod to slide on the base along the first direction, a right clamping main body is connected to the right seat body, and the right clamping main body is used to abut against the outer wall of the workpiece to be clamped.

[0011] In an embodiment of the present utility model, a left inclined groove is provided at the bottom of the left seat body, and a right inclined groove is provided at the bottom of the right seat body.

[0012] In an embodiment of the present utility model, the left inclined groove and the right inclined groove are symmetrically arranged.

[0013] In an embodiment of the present utility model, both the left driving member and the right driving member are rolling members.

[0014] In an embodiment of the present utility model, the left power rod is connected to the base through a third elastic member, and the right power rod is connected to the base through a fourth elastic member.

[0015] In an embodiment of the present utility model, threaded holes are provided on both the left seat body and the right seat body, screws are connected in the threaded holes, limit nuts are connected to the screws, the limit nut on the left seat body is located outside the left seat body, the limit nut on the right seat body is located outside the right seat body, a positioning frame is connected to the base, the positioning frame is located between the left seat body and the right seat body, one end of the screw is used to abut against the positioning frame, and the other end is connected to a limit nut.

[0016] In an embodiment of the present utility model, a left sliding track and a right sliding track are provided on the base, the left power rod is slidably connected in the left sliding track, and the right power rod is slidably connected in the right sliding track.

[0017] In an embodiment of the present utility model, the clamping device further includes a swing rod, the swing rod has a first end, a second end and a third end, the third end is located between the first end and the second end, and the third end is hinged to the base; the front external clamping member includes a front external seat body, a front external clamping main body is connected to the front external seat body, the front external clamping main body is used to abut against the outer wall of the workpiece to be clamped, the first end abuts against the front external power rod, and the second end is used to abut against the front external seat body to push the front external seat body to slide on the base along a second direction, and the rear external clamping member is fixed on the base.

[0018] In an embodiment of the present utility model, a front external sliding track is provided on the base, and the front external power rod is slidably connected in the front external sliding track.

[0019] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0020] The clamping device of the present utility model has a simple structure and is convenient and fast to operate. It can not only ensure the clamping reliability, but also greatly shorten the time required for positioning and clamping, improve the clamping efficiency, and is more conducive to the improvement of the processing efficiency. Description of the Drawings

[0021] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to the specific embodiments of the present utility model and in conjunction with the drawings.

[0022] Figure 1 is a schematic structural diagram of the clamping device based on external clamping of the present utility model;

[0023] Figure 2 is Figure 1 the top view of the structure shown;

[0024] Figure 3 is Figure 1 the front view of the structure shown;

[0025] Figure 4 is Figure 3 the sectional view taken along A-A in ;

[0026] Figure 5 is Figure 1 the partial enlarged view at S in ;

[0027] Figure 6 is a schematic structural diagram of the clamping device of the present utility model after removing the bearing plate;

[0028] Figure 7 is Figure 6 the top view of the structure shown;

[0029] Figure 8 is Figure 7 The sectional view taken along line B - B in [it];

[0030] Figure 9 is Figure 7 The sectional view taken along line C - C in [it];

[0031] Figure 10 It is the assembly schematic diagram of the front - side external clamping member of the present utility model on the base;

[0032] Figure 11 is Figure 10 The assembly schematic diagram of the front - side external seat body and the swing rod in [it];

[0033] Figure 12 is Figure 10 The exploded view of the structure in [it];

[0034] Figure 13 is Figure 10 The top view of the structure shown;

[0035] Figure 14 is Figure 13 The left view of the structure shown;

[0036] Figure 15 It is the assembly schematic diagram of the front - side external seat body and the front - side external clamping main body in the present utility model;

[0037] Figure 16 It is the assembly schematic diagram of the left - side seat body and the right - side seat body in the present utility model;

[0038] Figure 17 is Figure 16 The top view of the structure shown;

[0039] Figure 18 is Figure 16 The front view of the structure shown;

[0040] Figure 19 is Figure 18 The sectional view taken along line D - D in [it];

[0041] Figure 20 is Figure 16 The exploded view of the structure shown;

[0042] Figure 21 is Figure 20 The structural schematic diagram of the left - side seat body in [it];

[0043] Figure 22 is Figure 21 The bottom view of the structure shown;

[0044] Figure 23It is an assembly schematic diagram of the screw rod and the limit nut in the present utility model;

[0045] Figure 24 is Figure 23 the top view of the structure shown;

[0046] Figure 25 is Figure 24 the cross-sectional view at H-H in;

[0047] Figure 26 It is a usage state diagram of a clamping device of the present utility model;

[0048] Figure 27 is Figure 26 the top view of the structure shown;

[0049] Explanation of the reference numerals in the drawings of the specification:

[0050] 10. Base; 101. Front external sliding track; 102. Left sliding track; 103. Right sliding track; 104. Positioning frame; 105. Bearing plate;

[0051] 20. Left clamping member; 201. Left seat body; 2011. Left inclined groove; 2012. Threaded hole; 202. Left clamping main body; 2021. Arc-shaped groove;

[0052] 30. Right clamping member; 301. Right seat body; 3011. Right inclined groove; 302. Right clamping main body;

[0053] 40. Front external clamping member; 401. Front external seat body; 402. Front external clamping main body;

[0054] 50. Rear external clamping member;

[0055] 60. Swing rod; 601. First end; 602. Second end; 603. Third end; 604. Contact member;

[0056] 70. Front external power rod; 80. Left power rod; 801. Left driving member; 90. Right power rod; 901. Right driving member; 100. First elastic member; 110. Second elastic member; 120. Third elastic member; 130. Fourth elastic member; 140. Screw rod; 150. Limit nut; 160. Workpiece to be clamped. Detailed implementation manners

[0057] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it. However, the embodiments given are not intended to limit the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present disclosure, its application or use.

[0058] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "vertical", "upper", "lower", "top", "side", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present specification 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. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0059] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0060] The following will be combined with Figures 1 - 27 , and the structure of the clamping device based on outer clamping of this embodiment will be further described.

[0061] Embodiment

[0062] Referring to Figures 1 - 9 , this embodiment discloses a clamping device based on outer clamping, having a first direction and a second direction that are perpendicular to each other, and includes a base 10, a first clamping assembly, and a second clamping assembly;

[0063] The first clamping assembly includes a left clamping member 20 and a right clamping member 30, and the left clamping member 20 and the right clamping member 30 can move relative to each other along the first direction on the base 10;

[0064] The second clamping assembly includes a front external clamping member 40 and a rear external clamping member 50, and the front external clamping member 40 and the rear external clamping member 50 are relatively movable along a second direction on the base 10;

[0065] When the workpiece to be clamped 160 is in a clamped state, the left clamping member 20, the right clamping member 30, the front external clamping member 40, and the rear external clamping member 50 are all clamped on the outer wall of the workpiece to be clamped 160; that is, the left clamping member 20, the right clamping member 30, the front external clamping member 40, and the rear external clamping member 50 are respectively clamped on the left side, right side, front side, and rear side of the outer wall of the workpiece to be clamped 160, so as to realize the clamping and positioning of the workpiece to be clamped 160;

[0066] Refer to Figures 16 - 22 , the left clamping member 20 is driven by a left power rod 80 to slide on the base 10 along a first direction, the right clamping member 30 is driven by a right power rod 90 to slide on the base 10 along the first direction, a left inclined groove 2011 is provided at the bottom of the left clamping member 20, a right inclined groove 3011 is provided at the bottom of the right clamping member 30, the left power rod 80 is connected with a left driving member 801, and the left driving member 801 is slidably connected in the left inclined groove 2011, the right power rod 90 is connected with a right driving member 901, and the right driving member 901 is slidably connected in the right inclined groove 3011.

[0067] Among them, as Figure 19 shown, the left inclined groove 2011 inclines to the left relative to the first direction, and the right inclined groove 3011 inclines to the right relative to the second direction;

[0068] When the left power rod 80 is moved, the left driving member 801 moves in the left inclined groove 2011, so as to drive the left clamping member 20 to move along the first direction. Similarly, when the right power rod 90 is moved, the right driving member 901 moves in the right inclined groove 3011, so as to drive the right clamping member 30 to move along the first direction; it can be understood that when the left power rod 80 and the right power rod 90 are moved simultaneously, the left clamping member 20 and the right clamping member 30 can move towards each other or away from each other, so as to realize the clamping or loosening action.

[0069] The clamping device with the above structure realizes the relative movement of the left and right driving members by the cooperation of the inclined groove and the sliding rod, has a simple structure, is convenient and fast to operate, and at the same time, with the cooperation of the front and rear clamping, it can not only ensure the clamping reliability, but also greatly shorten the time required for positioning and clamping, improve the clamping efficiency, and is more conducive to the improvement of the processing efficiency.

[0070] It can be understood that the first direction in this embodiment is the left-right direction, the second direction is the front-rear direction, where the first direction, the second direction, and the height direction respectively correspond to the X, Y, and Z directions in the figure, and the three directions are perpendicular to each other in pairs.

[0071] In some solutions, such as Figure 1 and Figure 6 shown, the left clamping member 20 includes a left seat body 201, the left seat body 201 is driven by a left power rod 80 to slide on the base 10 along a first direction, a left clamping main body 202 is connected to the left seat body 201, and the left clamping main body 202 is used to abut against the outer wall of the workpiece 160 to be clamped. The right clamping member 30 includes a right seat body 301, the right seat body 301 is driven by a right power rod 90 to slide on the base 10 along the first direction, a right clamping main body 302 is connected to the right seat body 301, and the right clamping main body 302 is used to abut against the outer wall of the workpiece 160 to be clamped. The rear external clamping member 50 is fixed on the base 10.

[0072] Furthermore, a detachable connection is adopted between the left seat body 201 and the left clamping main body 202. For example, a bolt connection can be used; a detachable connection is adopted between the right seat body 301 and the right clamping main body 302. For example, a bolt connection can be used.

[0073] In some solutions, such as Figures 21 - 22 shown, a left inclined groove 2011 is provided at the bottom of the left seat body 201, and a right inclined groove 3011 is provided at the bottom of the right seat body 301.

[0074] In some solutions, the left inclined groove 2011 and the right inclined groove 3011 are symmetrically arranged so that the left seat body 201 and the right seat body 301 can approach or move away from each other better synchronously.

[0075] Furthermore, as Figures 19 - 20 shown, both the left driving member 801 and the right driving member 901 are rolling members, so that the driving members roll and move forward in the inclined grooves to reduce the wear between the driving members and the inclined grooves.

[0076] In some solutions, such as Figures 3 - 4 shown, the left power rod 80 is connected to the base 10 through a third elastic member 120 to realize the reset of the left power rod 80 through the third elastic member 120;

[0077] In some solutions, the right power rod 90 is connected to the base 10 through a fourth elastic member 130 to realize the reset of the right power rod 90 through the fourth elastic member 130.

[0078] Both the above-mentioned third elastic member 120 and fourth elastic member 130 can adopt elastic elements such as springs and deformable elastic sheets.

[0079] Furthermore, as Figure 5As shown, arc grooves 2021 are provided on the clamping surfaces of the left clamping body 202 and the right clamping body 302. Through the provision of these arc grooves 2021, the workpiece 160 to be clamped can be better pressed, improving the clamping reliability.

[0080] In some embodiments, such as Figures 23 - 25 As shown, threaded holes 2012 are provided on both the left seat body 201 and the right seat body 301. A screw rod 140 is connected in the threaded hole 2012, and a limit nut 150 is connected to the screw rod 140. The limit nut 150 on the left seat body 201 is located outside the left seat body 201, and the limit nut 150 on the right seat body 301 is located outside the right seat body 301. A positioning frame 104 is connected to the base 10, and the positioning frame 104 is located between the left seat body 201 and the right seat body 301. One end of the screw rod 140 is used to abut against the positioning frame 104, and the other end is connected to a limit nut 150.

[0081] When the distance between the left seat body 201 and the right seat body 301 is at its minimum, one end of the screw rod 140 of the left seat body 201 abuts against one end of the positioning frame 104, and the other end of the screw rod 140 of the left seat body 201 is connected to the limit nut 150. One end of the screw rod 140 of the right seat body 301 abuts against the other end of the positioning frame 104, and the other end of the screw rod 140 of the right seat body 301 is connected to a limit nut 150.

[0082] The above structure enables the positions of the left and right seat bodies on the corresponding screw rods to be adjustable. When it is necessary to use the screw-nut structure to adjust the position of the seat body, it is achieved by rotating the screw rod to adjust the screwing depth of the screw rod. After rotation in place, the limit nut is installed for positioning. This structure can adjust the minimum distance between the left seat body 201 and the right seat body 301, and at the same time, it can also cause the left and right seat bodies to shift left or right as a whole to change the clamping position;

[0083] It can be understood that the adjustment of the above screw-nut structure needs to be completed before the clamping operation.

[0084] Furthermore, the positioning frame 104 is in the shape of a cross.

[0085] In some embodiments, such as Figure 1 As shown, a bearing plate 105 is connected to the positioning frame 104 for placing the workpiece 160 to be clamped.

[0086] In some solutions, left sliding rails 102 and right sliding rails 103 are provided on the base 10. The left power rod 80 is slidably connected in the left sliding rail 102 to improve the linear motion accuracy of the left power rod 80;

[0087] The right power rod 90 is slidably connected in the right sliding track 103 to improve the linear motion accuracy of the right power rod 90.

[0088] In some embodiments, as Figures 10 - 14 shown, the clamping device further includes a swing rod 60. The swing rod 60 has a first end 601, a second end 602, and a third end 603. The third end 603 is located between the first end 601 and the second end 602. The third end 603 is hinged to the base 10, so that the swing rod 60 can swing around the hinge point of the third end 603;

[0089] The front external clamping member 40 includes a front external seat body 401. The front external seat body 401 is driven by a front external power rod 70 to slide on the base 10 along a second direction;

[0090] The first end 601 of the swing rod 60 abuts against the front external power rod 70, and the second end 602 is used to abut against the front external seat body 401 to push the front external seat body 401 to slide on the base 10 along the second direction.

[0091] When the front external power rod 70 is pushed to move linearly, it will push the swing rod 60 to swing around the hinge point of the third end 603, so as to push the front external seat body 401 to move linearly along the second direction through the swing of the swing rod 60, so as to realize the adjustment of the position of the front external seat body 401.

[0092] The swing rod 60 only abuts against the front external seat body 401 to push the front external seat body 401 to move in a single direction through the swing rod 60. The reverse movement of the front external seat body 401 can be realized by the reset of the second elastic member 110 or by the reverse push of other driving members.

[0093] Furthermore, to reduce contact wear, as Figure 12 shown, contact members 604 are connected to both the first end 601 and the second end 602. The contact members 604 are rolling members. The contact member 604 at the first end 601 abuts against the front external power rod 70, and the contact member 604 at the second end 602 abuts against the front external seat body 401.

[0094] The above-mentioned rolling members can adopt rolling bearings.

[0095] In some embodiments, as Figure 15 shown, the front external clamping member 40 further includes a front external clamping main body 402. The front external clamping main body 402 is connected to the front external seat body 401. The front external clamping main body 402 is used as a clamping part to clamp the front side of the outer wall of the workpiece to be clamped 160. The rear external clamping member 50 is fixed on the base 10 and is used to clamp the rear side of the outer wall of the workpiece to be clamped 160.

[0096] Furthermore, a detachable connection is adopted between the front external clamping body 402 and the front external seat body 401. For example, a snap connection or other methods can be used.

[0097] Furthermore, the front external clamping body 402 is connected to the front external seat body 401 in a liftable manner to adjust its height. The front external clamping body 402 and the front external seat body 401 can be connected by a first elastic member 100 to facilitate elastic reset.

[0098] Both the above-mentioned first elastic member 100 and second elastic member 110 can adopt elastic elements such as springs and deformable elastic sheets.

[0099] In some solutions, a front external sliding track 101 is provided on the base 10, and the front external power rod 70 is slidably connected in the front external sliding track 101 to improve the linear motion accuracy and motion reliability of the front external power rod 70.

[0100] In some implementation schemes, the above-mentioned workpiece to be clamped 160 can be a battery case, or other shell-like parts or other types of solid parts.

[0101] Taking the clamping device with the first, second, third, and fourth elastic members as an example, the working process of the above-mentioned clamping device will be specifically described as follows:

[0102] Clamping and positioning of the workpiece to be clamped 160 in the first state (refer to Figures 26 - 27 ): Move the left power rod 80 and the right power rod 90 simultaneously, so that the left seat body 201 and the right seat body 301 move away from each other and open, that is, make the left clamping body 202 and the right clamping body 302 in an open state. At the same time, move the front external power rod 70 to move the front external clamping body 402 outward relative to the rear external clamping member 50, place the workpiece to be clamped 160 in the clamping space surrounded by the left clamping body 202, the right clamping body 302, the front external clamping body 402, and the rear external clamping member 50. Then, release the left power rod 80 and the right power rod 90, so that the two gradually approach under the elastic force of the corresponding elastic members (the third and fourth elastic members), so that the left clamping body 202 and the right clamping body 302 are respectively clamped on the left and right outer walls of the workpiece to be clamped 160. At the same time, release the front external power rod 70, so that the front external seat body 401 where the front external clamping body 402 is located retracts along the second direction under the action of the corresponding second elastic member 110 until the front external clamping body 402 is clamped on the front outer wall of the workpiece to be clamped 160, and at the same time, make the rear outer wall of the workpiece to be clamped 160 abut against the rear external clamping member 50, thereby realizing the clamping and positioning of the workpiece to be clamped 160 in the first state.

[0103] All of the above optional technical solutions can be combined arbitrarily to form optional embodiments of the present utility model, that is, any number of embodiments can be combined to meet the requirements of different application scenarios, and all are within the protection scope of this application, which will not be elaborated one by one here.

[0104] It should be noted that 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 modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A clamping device based on outer clamping, having a first direction and a second direction perpendicular to each other, characterized in that: include, Pedestal; A first clamping assembly, the first clamping assembly comprising a left clamping member and a right clamping member on the base which can move relatively along a first direction; A second clamping assembly, the second clamping assembly comprising a front external clamping member and a rear external clamping member that are relatively movable along a second direction on the base; Wherein, when the part to be clamped is in a clamping state, the left clamping part, the right clamping part, the front external clamping part and the rear external clamping part are all clamped on the outer wall of the part to be clamped; The left clamping member is driven by the left power rod to slide along the first direction on the base, and the right clamping member is driven by the right power rod to slide along the first direction on the base. A left oblique groove is provided at the bottom of the left clamping member, and a right oblique groove is provided at the bottom of the right clamping member. The left power rod is connected to the left driving member, and the left driving member is slidably connected in the left oblique groove. The right power rod is connected to the right driving member, and the right driving member is slidably connected in the right oblique groove.

2. The clamping device based on outer side clamping according to claim 1, characterized in that: The left-side clamping member includes a left-side seat body, which is driven by a left-side power rod to slide along a first direction on the base, and a left-side clamping body is connected to the left-side seat body, and the left-side clamping body is used to abut against the outer wall of the member to be clamped. The right-side clamping member includes a right-side seat body, which is driven by a right-side power rod to slide along a first direction on the base, and a right-side clamping body is connected to the right-side seat body, and the right-side clamping body is used to abut against the outer wall of the member to be clamped.

3. The clamping device based on outer side clamping according to claim 2, characterized in that: The bottom of the left seat body is provided with a left oblique groove, and the bottom of the right seat body is provided with a right oblique groove.

4. The clamping device based on outer side clamping according to claim 1, characterized in that: The left side inclined groove and the right side inclined groove are arranged symmetrically.

5. The clamping device based on outer side clamping according to claim 1, characterized in that: The left-side driving member and the right-side driving member are both rolling members.

6. The clamping device based on outer side clamping according to claim 1, characterized in that: The left power rod and the base are connected via a third elastic member, and the right power rod and the base are connected via a fourth elastic member.

7. The clamping device based on outer side clamping according to claim 2, characterized in that: The left seat body and the right seat body are both provided with threaded holes, and screws are connected in the threaded holes. The screws are both connected with limiting nuts, the limiting nut on the left seat body is located at the outside of the left seat body, and the limiting nut on the right seat body is located at the outside of the right seat body. A positioning frame is connected to the base, and the positioning frame is located between the left seat body and the right seat body. One end of the screw is used to abut against the positioning frame, and the other end is connected with the limiting nut.

8. The clamping device based on outside clamping according to claim 1, characterized in that: The base is provided with a left sliding track and a right sliding track, the left power rod is slidably connected to the left sliding track, and the right power rod is slidably connected to the right sliding track.

9. The clamping device based on outside clamping according to claim 1, characterized in that: It also includes a swing rod, which has a first end, a second end and a third end, the third end is located between the first end and the second end, and the third end is hinged to the base; the front external clamping member includes a front external seat body, a front external clamping body is connected to the front external seat body, the front external clamping body is used to abut against the outer wall of the member to be clamped, the first end abuts against the front external power rod, the second end is used to abut against the front external seat body to push the front external seat body to slide along the second direction on the base, and the rear external clamping member is fixed to the base.

10. The clamping device based on outside clamping according to claim 9, characterized in that: The base is provided with a front external sliding track, and the front external power rod is slidably connected to the front external sliding track.

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