Clamping device based on inner and outer side clamping

Abstract

The utility model relates to a clamping device based on inner and 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 which can relatively move on the base in the first direction. The second clamping assembly comprises a front side inner clamping piece and a rear side inner clamping piece which can move relatively in the second direction on the base. When the shell to be clamped is in a clamped state, the left side clamping piece and the right side clamping piece are both clamped on the outer wall of the clamped shell, and the front side inner clamping piece and the rear side inner clamping piece are both clamped on the inner wall of the shell to be clamped. The clamping device based on inner and outer side clamping can be well suitable for the working condition that the partial outer wall of a shell needs to be assembled, the interference phenomenon generated in the follow-up assembling process is effectively avoided, operation is convenient and fast, and the assembling efficiency is greatly improved.

Description

Technical Field

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

[0002] The clamping device is a commonly used positioning device in production and processing, which is used to clamp and position products for subsequent processing and assembly of products. When assembling some shell products, the shell is usually clamped from the outside around to ensure the clamping reliability and prevent clamping deformation. However, when it is necessary to assemble parts on the local outer wall of the shell, this clamping method may no longer be applicable, or interference may occur with the subsequent part assembly operation, unable to meet the assembly requirements. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the clamping device in the prior art cannot adapt to the working conditions where parts need to be assembled on the local outer wall of the shell.

[0004] To solve the above technical problem, the utility model provides a clamping device based on inner and 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 inner clamping member and a rear inner clamping member that can move relative to each other along the second direction on the base;

[0008] Wherein, when the shell to be clamped is in a clamped state, the left clamping member and the right clamping member are both clamped on the outer wall of the shell to be clamped, and the front inner clamping member and the rear inner clamping member are both clamped on the inner wall of the shell to be clamped.

[0009] In an embodiment of the utility model, the rear inner clamping member is fixed on the base, the front inner clamping member includes a front inner seat body, the front inner seat body is driven by a front inner power rod to slide along the second direction on the base, and a front inner clamping main body is connected to the front inner seat body, and the front inner clamping main body is used to abut against the inner wall of the shell to be clamped.

[0010] In an embodiment of the utility model, the front inner power rod and the base are connected by a first elastic member.

[0011] In an embodiment of the present utility model, a front internal sliding track is provided on the base, and the front internal power rod is slidably connected in the front internal sliding track.

[0012] In an embodiment of the present utility model, the left clamping member is driven by a left power rod to slide on the base along a first direction, the right clamping member is driven by a right power rod to slide on the base along the first direction, a left inclined slot is provided at the bottom of the left clamping member, a right inclined slot 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 slot, the right power rod is connected with a right driving member, and the right driving member is slidably connected in the right inclined slot.

[0013] In an embodiment of the present utility model, the left clamping member includes a left seat body, the left inclined slot is provided at the bottom of the left seat body, the left seat body is driven by a left power rod to slide on the base along the first direction, a left clamping main body is connected to the left seat body, and the left clamping main body is used for abutting against the outer wall of the shell to be clamped; the right clamping member includes a right seat body, the right inclined slot is provided at the bottom of the 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 for abutting against the outer wall of the shell to be clamped.

[0014] In an embodiment of the present utility model, the left inclined slot and the right inclined slot are symmetrically arranged.

[0015] In an embodiment of the present utility model, both the left driving member and the right driving member are rolling members.

[0016] In an embodiment of the present utility model, the left power rod is connected to the base through a second elastic member, and the right power rod is connected to the base through a third elastic member.

[0017] 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.

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

[0019] In an embodiment of the present utility model, threaded holes are provided on both the left seat body and the right seat body. A screw rod is connected in the threaded hole, and a limit nut is connected to each screw rod. The limit nut on the left seat body is located outside the left seat body, and the limit nut on the right seat body is located outside 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 rod is used to abut against the positioning frame, and the other end is connected with a limit nut.

[0020] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0021] The clamping device based on inner and outer side clamping of the present utility model can be well applied to the working conditions where local outer walls of the shell need to be assembled, effectively avoiding interference phenomena occurring during subsequent assembly, with convenient operation and greatly improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 specific embodiments of the present utility model in conjunction with the accompanying drawings.

[0023] Figure 1 is a schematic structural diagram of the clamping device based on inner and outer side clamping of the present utility model;

[0024] Figure 2 is Figure 1 a top view of the structure shown;

[0025] Figure 3 is Figure 1 a front view of the structure shown;

[0026] Figure 4 is Figure 3 a cross-sectional view taken at A-A in;

[0027] Figure 5 is Figure 1 a partial enlarged view at S in;

[0028] Figure 6 is a schematic structural diagram of the clamping device of the present utility model after removing the bearing plate;

[0029] Figure 7 is Figure 6 a top view of the structure shown;

[0030] Figure 8 is Figure 7 a cross-sectional view taken at B-B in;

[0031] Figure 9 is Figure 7 a cross-sectional view taken at C-C in;

[0032] Figure 10 It is an assembly schematic diagram of the front internal clamping member of the present utility model on the base;

[0033] Figure 11 is Figure 10 An exploded view of the structure in;

[0034] Figure 12 is Figure 10 A top view of the structure shown;

[0035] Figure 13 is Figure 12 A left view of the structure shown;

[0036] Figure 14 is Figure 12 A cross-sectional view taken along the line F-F in;

[0037] Figure 15 It is an assembly schematic diagram of the left seat body and the right seat body in the present utility model;

[0038] Figure 16 is Figure 15 A top view of the structure shown;

[0039] Figure 17 is Figure 15 A front view of the structure shown;

[0040] Figure 18 is Figure 17 A cross-sectional view taken along the line D-D in;

[0041] Figure 19 is Figure 15 An exploded view of the structure shown;

[0042] Figure 20 is Figure 19 A schematic diagram of the structure of the left seat body in;

[0043] Figure 21 is Figure 20 A bottom view of the structure shown;

[0044] Figure 22 It is an assembly schematic diagram of the screw rod and the limit nut in the present utility model;

[0045] Figure 23 is Figure 22 A top view of the structure shown;

[0046] Figure 24 is Figure 23 A cross-sectional view taken along the line H-H in;

[0047] Figure 25 It is a usage state diagram of a clamping device of the present utility model;

[0048] Figure 26 is Figure 25 the top view of the structure shown;

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

[0050] 10. Base; 101. Front internal 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 groove;

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

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

[0054] 50. Rear internal clamping member;

[0055] 60. First elastic member;

[0056] 70. Front internal power rod; 80. Left power rod; 801. Left drive member; 90. Right power rod; 901. Right drive member; 100. Second elastic member; 110. Third elastic member; 120. Screw; 130. Limit nut; 140. Shell to be clamped. Detailed implementation manners

[0057] The following further describes the present utility model 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 described embodiments are not used as a limitation to 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 and 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 drawings. It is only for the convenience of describing the present disclosure 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 should not be construed 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 - 26 to further describe the structure of this embodiment.

[0061] Embodiment

[0062] Refer to Figures 1 - 9 , this embodiment discloses a clamping device based on inner and outer side 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 in the first direction on the base 10;

[0064] The second clamping assembly includes a front inner clamping member 40 and a rear inner clamping member 50, and the front inner clamping member 40 and the rear inner clamping member 50 can move relative to each other in the second direction on the base 10;

[0065] Among them, refer to Figures 25 - 26, when the housing 140 to be clamped is in the clamped state, both the left clamping member 20 and the right clamping member 30 are clamped on the outer wall of the housing 140 to be clamped, and both the front internal clamping member 40 and the rear internal clamping member 50 are clamped on the inner wall of the housing 140 to be clamped; that is, the left clamping member 20 and the right clamping member 30 are respectively clamped on the left and right sides of the outer wall of the housing 140 to be clamped, and the front internal clamping member 40 and the rear internal clamping member 50 are respectively clamped on the front and rear sides of the inner wall of the housing 140 to be clamped, thereby realizing the clamping and positioning of the housing 140 to be clamped;

[0066] The above clamping state may be the state when the housing 140 to be clamped is placed face down. For example, the clamping housing is a rectangular frame with an opening, and at this time, "placed face down" means the inverted state with the opening of the rectangular frame facing downwards.

[0067] In the above structure, when the housing 140 to be clamped is in the clamped state, both the left and right clamping members 30 clamp the housing 140 to be clamped from the outside, and both the front internal clamping member 40 and the rear internal clamping member 50 are clamped on the inner wall of the housing 140 to be clamped. That is, the left and right sides of the housing 140 to be clamped are in a state of being squeezed and clamped, and the front and rear sides are in a state of being stretched and clamped. At this time, it is convenient to assemble parts at the front outer wall of the housing 140 to be clamped without being interfered by the clamping members.

[0068] The above clamping device structure can be well applied to the working conditions where local outer walls of the housing need to be assembled. The clamping of the local outer wall where the parts need to be assembled is carried out by the internal clamping members extending into the housing interior, effectively avoiding the interference phenomenon occurring during subsequent assembly, with convenient operation and greatly improving the assembly efficiency.

[0069] 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 pairwise.

[0070] In some embodiments, as Figure 1 and Figure 6 shown, the rear internal clamping member 50 is fixed on the base 10 and remains stationary, and the front internal clamping member 40 includes a front internal seat body 401. The front internal seat body 401 is driven by a front internal power rod 70 to slide on the base 10 along the second direction. A front internal clamping main body 402 is connected to the front internal seat body 401, and the front internal clamping main body 402 is used to abut against the inner wall of the housing 140 to be clamped.

[0071] Further, as Figures 10 - 14 shown, the front internal power rod 70 and the base 10 are connected by a first elastic member 60 to utilize the first elastic member 60 to realize the reset of the front internal power rod 70.

[0072] Each of the above-mentioned first elastic members 60 may be an elastic element such as a spring or a deformable elastic piece.

[0073] In some embodiments, as Figure 11 shown, a front internal sliding track 101 is provided on the base 10, and the front internal power rod 70 is slidably connected in the front internal sliding track 101 to improve the linear motion accuracy and motion reliability of the front internal power rod 70.

[0074] In some embodiments, as Figures 15 - 18 shown, the left clamping member 20 is driven by the left power rod 80 to slide on the base 10 in the first direction, and the right clamping member 30 is driven by the right power rod 90 to slide on the base 10 in the first direction. A left inclined groove 2011 is provided at the bottom of the left clamping member 20, and 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.

[0075] Among them, 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;

[0076] When the left power rod 80 is moved, the left driving member 801 moves in the left inclined groove 2011, thereby driving the left clamping member 20 to move in the first direction. Similarly, when the right power rod 90 is moved, the right driving member 901 moves in the right inclined groove 3011, thereby driving the right clamping member 30 to move in 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 or away from each other, thereby realizing the clamping or loosening action.

[0077] The above structure uses the cooperation of the inclined groove and the power rod to realize the relative movement of the left and right driving members. The structure is simple, the operation is convenient and fast, which 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.

[0078] In some embodiments, the left clamping member 20 includes a left seat body 201, as Figures 20 - 21 shown, a left inclined groove 2011 is provided at the bottom of the left seat body 201. The left seat body 201 is driven by the left power rod 80 to slide on the base 10 in the 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 shell 140 to be clamped;

[0079] The right clamping member 30 includes a right seat body 301. The bottom of the right seat body 301 is provided with the right inclined groove 3011. 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. The right clamping main body 302 is used to abut against the outer wall of the shell 140 to be clamped.

[0080] 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 adopted; 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 adopted.

[0081] 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.

[0082] Furthermore, as Figure 19 shown, both the left driving member 801 and the right driving member 901 are rolling members, so that the driving members roll and advance in the inclined grooves, so as to reduce the wear between the driving members and the inclined grooves.

[0083] In some solutions, as Figure 4 shown, the left power rod 80 is connected to the base 10 through a second elastic member 100, so as to realize the reset of the left power rod 80 through the second elastic member 100;

[0084] the right power rod 90 is connected to the base 10 through a third elastic member 110, so as to realize the reset of the right power rod 90 through the third elastic member 110.

[0085] Both the above-mentioned second elastic member 100 and third elastic member 110 can adopt elastic elements such as springs and deformable elastic sheets.

[0086] Furthermore, as Figure 5 shown, arc-shaped grooves 2021 are provided on the clamping surfaces of the left clamping main body 202 and the right clamping main body 302. Through the setting of the arc-shaped grooves 2021, the shell 140 to be clamped is better pressed, and the clamping reliability is improved.

[0087] In some solutions, as Figure 1 shown, a left sliding track 102 and a right sliding track 103 are provided on the base 10. The left power rod 80 is slidably connected in the left sliding track 102. The left power rod 80 is slidably connected in the left sliding track 102, so as to improve the linear motion accuracy of the left power rod 80;

[0088] 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.

[0089] Furthermore, a front internal sliding track 101 is provided on the base 10, and the front internal power rod 70 is slidably connected in the front external sliding track to improve the linear motion accuracy of the front internal power rod 70.

[0090] In some solutions, as Figures 22 - 24 shown, threaded holes 2012 are provided on both the left seat body 201 and the right seat body 301. A screw rod 120 is connected in the threaded hole 2012, and a limit nut 130 is connected to the screw rod 120. The limit nut 130 on the left seat body 201 is located outside the left seat body 201, and the limit nut 130 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 120 is used to abut against the positioning frame 104, and the other end is connected to a limit nut 130.

[0091] When the distance between the left seat body 201 and the right seat body 301 is the smallest, one end of the screw rod 120 on the left seat body 201 abuts against one end of the positioning frame 104, the other end of the screw rod 120 on the left seat body 201 is connected to the limit nut 130, one end of the screw rod 120 on the right seat body 301 abuts against the other end of the positioning frame 104, and the other end of the screw rod 120 on the right seat body 301 is connected to a limit nut 130.

[0092] 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 make the left and right seat bodies shift left or right as a whole to change the clamping position;

[0093] It can be understood that the adjustment of the above screw-nut structure needs to be completed before the clamping operation.

[0094] Furthermore, the positioning frame 104 is in the shape of a cross.

[0095] In some embodiments, as Figure 1 shown, a bearing plate 105 is connected to the positioning frame 104 for placing the workpiece to be clamped.

[0096] In some implementation schemes, the workpiece to be clamped can be a battery case or other shell-like parts.

[0097] Taking an assembly fixture with first, second, and third elastic members as an example, the working process of the above clamping device will be specifically illustrated as follows:

[0098] Clamping and positioning of the housing 140 to be clamped (refer to Figures 25 - 26 ): Move the left power rod 80 and the right power rod 90, 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 main body 202 and the right clamping main body 302 in an open state. At the same time, move the front internal power rod 70 in the second direction to adjust the position of the front internal clamping main body 402, and then place the housing 140 to be clamped, so that the front internal clamping main body 402 and the rear internal clamping member 50 are both located inside the housing 140 to be clamped, and the left clamping main body 202 and the right clamping main body 302 are both located outside the housing 140 to be clamped. Then, loosen the front internal power rod 70, and it will retract in the second direction under the action of the first elastic member 60, thereby driving the front internal clamping main body 402 to move together until it abuts against the front inner wall of the housing 140 to be clamped. At the same time, the rear internal clamping member 50 also naturally abuts against the rear inner wall of the housing 140 to be clamped; and loosen 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 second and third elastic members), thereby enabling the left clamping main body 202 and the right clamping main body 302 to respectively clamp on the left and right outer walls of the housing 140 to be clamped, thus completing the clamping operation.

[0099] Any combination of the above all optional technical solutions can form an optional embodiment of the present invention, 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.

[0100] It should be noted that the above embodiments are merely examples 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 inner and outer clamping, having a first direction and a second direction perpendicular to each other, characterized in that: Comprising, a base; a first clamping assembly, the first clamping assembly including a left clamping member and a right clamping member that can move relative to each other along a first direction on the base; a second clamping assembly, the second clamping assembly including a front internal clamping member and a rear internal clamping member that can move relative to each other along a second direction on the base; wherein, when the housing to be clamped is in a clamped state, both the left clamping member and the right clamping member are clamped on the outer wall of the housing to be clamped, and both the front internal clamping member and the rear internal clamping member are clamped on the inner wall of the housing to be clamped.

2. The clamping device based on inner and outer clamping according to claim 1, characterized in that: The rear internal clamping member is fixed on the base, the front internal clamping member includes a front internal seat body, the front internal seat body is driven by a front internal power rod to slide along the second direction on the base, and a front internal clamping main body is connected to the front internal seat body, and the front internal clamping main body is used to abut against the inner wall of the housing to be clamped.

3. The clamping device based on inner and outer clamping according to claim 2, characterized in that: The front internal power rod and the base are connected by a first elastic member.

4. The clamping device based on inner and outer clamping according to claim 2, characterized in that: A front internal sliding track is provided on the base, and the front internal power rod is slidably connected in the front internal sliding track.

5. The clamping device based on inner and outer clamping according to claim 1, characterized in that: 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.

6. The clamping device based on inner and outer clamping according to claim 5, wherein: The left clamping member includes a left seat body, the left inclined groove is provided at the bottom of the left seat body, the left seat body is driven by a left power rod to slide along the first direction on the base, 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 housing to be clamped. The right clamping member includes a right seat body, the right inclined groove is provided at the bottom of the right seat body, the right seat body is driven by a right power rod to slide along the first direction on the base, and 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 housing to be clamped.

7. The clamping device based on inner and outer clamping according to claim 5, wherein: The left inclined groove and the right inclined groove are symmetrically arranged.

8. The clamping device based on inner and outer clamping according to claim 5, characterized in that: Both the left driving member and the right driving member are rolling members.

9. The clamping device based on inner and outer clamping according to claim 5, characterized in that: The left power rod and the base are connected by a second elastic member, and the right power rod and the base are connected by a third elastic member.

10. The clamping device based on inner and outer clamping according to claim 5, characterized in that: 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.

11. The clamping device based on inner and outer clamping according to claim 2, wherein: A front internal sliding track is provided on the base, and the front internal power rod is slidably connected in the front internal sliding track.

12. The clamping device based on inner and outer clamping according to claim 6, characterized in that: Threaded holes are provided on both the left seat body and the right seat body. Screws are connected in the threaded holes, and limit nuts are connected to the screws. The limit nuts on the left seat body are located outside the left seat body, and the limit nuts on the right seat body are located outside 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 a limit nut.

Images