A clamping jig and a CNC machining device

Abstract

This utility model discloses a clamping fixture and CNC machining equipment. The clamping fixture includes a base, a clamping structure, an elastic connection structure, and a driving structure. The base has a clamping surface. The clamping structure is movably mounted on the base and has multiple clamping parts spaced apart, each clamping part defining a clamping area with the clamping surface. The elastic connection structure is connected to both the clamping structure and the base. The driving structure is mounted on the base and is drivenly connected to the clamping structure. In the clamping fixture of this application, after the operator places the workpiece in the clamping area, the clamping structure can pre-clamp the workpiece in the clamping area under the elastic force of the elastic connection structure, thereby reducing the probability of the workpiece shifting under external influences. Under the drive of the subsequent driving structure, the clamping structure can firmly clamp the workpiece in the clamping area. Furthermore, the elastic connection structure makes the clamping fixture of this application have higher clamping accuracy.

Description

Technical Field

[0001] This utility model relates to the field of fixing mechanism technology, and in particular to a clamping fixture and CNC machining equipment. Background Technology

[0002] Before machining a workpiece, it is necessary to use a clamping fixture to hold and fix the workpiece in order to reduce the shaking of the workpiece during the machining process.

[0003] In related technologies, when a clamping fixture clamps a workpiece, a driving structure is needed to drive the clamping structure close to the base so that the clamping structure can cooperate with the base to clamp and fix the workpiece in the clamping area.

[0004] However, before the driving structure drives the clamping structure to clamp the workpiece in the clamping area, the workpiece in the clamping area is still movable. Under these circumstances, the workpiece is prone to displacement due to external influences, which results in low clamping accuracy of the clamping fixture. Utility Model Content

[0005] The purpose of this invention is to at least solve one of the technical problems existing in the prior art. The first aspect of this invention provides a clamping fixture with higher clamping accuracy. The second aspect of this invention also provides a CNC machining equipment.

[0006] The clamping fixture provided according to the first aspect of the present invention includes a base, a clamping structure, an elastic connection structure, and a driving structure; the base has a clamping surface; the clamping structure is movably disposed on the base, and the clamping structure has a plurality of clamping parts spaced apart, each clamping part defining a clamping area with the clamping surface, the clamping area being used to clamp a workpiece; the elastic connection structure is connected to the clamping structure and the base respectively, and is used to provide elastic force to keep the clamping parts close to the clamping area; the driving structure is disposed on the base and is drivenly connected to the clamping structure, the driving structure being able to drive the clamping structure to move relative to the base, so that the clamping parts move closer to or away from the clamping area.

[0007] The clamping fixture described in this utility model has at least the following beneficial effects: In the clamping fixture of this application, since the elastic connection structure is connected to the clamping structure and the base respectively, after the worker places the workpiece in the clamping area, under the elastic force of the elastic connection structure, the clamping structure can pre-clamp the workpiece in the clamping area, thereby reducing the probability of the workpiece shifting under external influence. Under the drive of the subsequent driving structure, the clamping structure can firmly complete the clamping of the workpiece in the clamping area. Furthermore, the setting of the elastic connection structure makes the clamping fixture of this application have higher clamping accuracy for the workpiece.

[0008] According to the clamping fixture described in the first aspect of the present invention, the clamping structure further includes a hinge portion, a first driving portion and a second driving portion. The hinge portion is hinged to the base body. The first driving portion and the second driving portion are both located on the side of the hinge portion away from the clamping portion. The output end of the driving structure is connected to the first driving portion. The elastic connection structure is connected to the second driving portion and the base body respectively.

[0009] According to the clamping fixture described in the first aspect of the present invention, the second driving part is located on the side of the first driving part away from the hinge part.

[0010] According to the clamping fixture described in the first aspect of the present invention, the distance between the first driving part and the hinge part is greater than the distance between the clamping part and the hinge part.

[0011] According to the first aspect of the present invention, the clamping fixture includes a pressure member, a first driving member, and a second driving member. One end of the first driving member forms a hinge portion, and the other end of the first driving member forms a first driving portion. One end of the second driving member is detachably connected to the first driving portion, and the other end of the second driving member forms a second driving portion. The pressure member includes a connecting portion and a plurality of clamping portions. The connecting portion is detachably connected to the hinge portion. The plurality of clamping portions are axially spaced along the rotation axis of the hinge portion and are all connected to the connecting portion.

[0012] According to the clamping fixture of the first aspect of the present invention, the clamping part includes a pressing section and an elastic connecting section. The pressing section extends perpendicularly to the clamping surface, and the elastic connecting section is arranged parallel to the clamping surface. The opposite ends of the elastic connecting section are respectively connected to the connecting part and the pressing section. At least a portion of the structure of the elastic connecting section near the clamping area abuts against the hinge part.

[0013] According to the clamping fixture described in the first aspect of the present invention, the driving structure includes a cylinder, which is located at one end of the base away from the clamping structure. The base has a through hole, and the telescopic rod of the cylinder passes through the through hole and is connected to the first driving part.

[0014] According to the clamping fixture described in the first aspect of the present invention, the telescopic rod of the cylinder is provided with an elongated hole, the extension direction of the elongated hole is perpendicular to the axial direction of the hinge part, and an mounting shaft is mounted on the first driving part, the mounting shaft being slidably inserted into the elongated hole.

[0015] According to the clamping fixture described in the first aspect of the present invention, the base body further includes a protective sleeve, which is disposed in the clamping area. A clamping channel is formed inside the protective sleeve to allow the workpiece to pass through. The protective sleeve has a deformable part, which can deform into the clamping channel under the push of the clamping part to squeeze the workpiece in the clamping channel.

[0016] The CNC machining equipment provided according to the second aspect of the present invention includes the clamping fixture provided in the first aspect of the present invention.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of the structure of a clamping fixture according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A structural schematic diagram of the clamping fixture shown from another perspective;

[0021] Figure 3 for Figure 1 A structural schematic diagram of the clamping fixture shown from another perspective;

[0022] Figure 4 for Figure 3 A cross-sectional view of the clamping fixture along the AA direction;

[0023] Figure 5 for Figure 4 A partial enlarged view of the structure at point C of the clamping fixture shown;

[0024] Figure 6 for Figure 4 A cross-sectional view of the clamping fixture along the BB direction.

[0025] Figure label:

[0026] Workpiece 10;

[0027] 100 base; 101 clamping surface; 110 protective sleeve;

[0028] Clamping structure 200; pressing member 210; clamping part 211; pressing section 211a; elastic connecting section 211b; connecting part 212; first driving member 220; hinge part 221; first driving part 222; mounting shaft 223; second driving member 230; second driving part 231;

[0029] 300mm flexible connection structure;

[0030] Drive structure 400; cylinder 410; telescopic rod 411; elongated hole 411a. Detailed Implementation

[0031] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0032] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] The following is for reference. Figures 1 to 6 The clamping fixture of the first aspect of this application will be described in detail.

[0036] refer to Figures 1 to 5 According to a first aspect embodiment of the present invention, a clamping fixture includes a base 100, a clamping structure 200, an elastic connection structure 300, and a driving structure 400. The base 100 has a clamping surface 101. The clamping structure 200 is movably disposed on the base 100 and has a plurality of clamping portions 211 spaced apart. Each clamping portion 211 defines a clamping area with the clamping surface 101. The clamping area is used to clamp a workpiece 10. The elastic connection structure 300 is connected to the clamping structure 200 and the base 100 respectively and is used to provide elastic force to keep the clamping portion 211 close to the clamping area. The driving structure 400 is disposed on the base 100 and is drivenly connected to the clamping structure 200. The driving structure 400 can drive the clamping structure 200 to move relative to the base 100 so that the clamping portion 211 moves closer to or away from the clamping area.

[0037] Furthermore, when the operator needs to place the workpiece 10 in the clamping area, the operator can overcome the elastic force of the elastic connection structure 300 so that the clamping part 211 moves away from the clamping area. At this time, the operator can place the workpiece 10 in each clamping area respectively. Then, under the action of the elastic force of the elastic connection structure 300, each clamping part 211 moves closer to the clamping area simultaneously to cooperate with the clamping surface 101 to clamp the workpiece 10 in each clamping area, thereby completing the pre-fixation of the workpiece 10 in the clamping area. Then, under the drive of the drive structure 400, each clamping part 211 of the clamping structure 200 moves closer to the clamping surface 101 again to complete the clamping and fixing of the workpiece 10 in each clamping area.

[0038] It is understandable that the elastic connection structure 300 is designed to apply an elastic force to the clamping structure 200, so that the clamping part 211 of the clamping structure 200 can remain close to the clamping area. Thus, after the operator places a workpiece 10 into a clamping area, the corresponding clamping part 211 can immediately pre-clamp the workpiece 10 under the elastic force of the elastic connection structure 300, thereby reducing the probability of the workpiece 10 shifting under the influence of the external environment, and thus making the clamping fixture of this application have higher clamping accuracy.

[0039] It is understandable that during machining, there may be situations where the gas or electricity is interrupted. In such cases, the drive structure 400 cannot continue to work, and correspondingly, the drive structure 400 cannot drive the clamping structure 200 to clamp the workpiece 10 in the clamping area. In this application, by setting the elastic connection structure 300, when the drive structure 400 fails to work normally for some reason, the elastic connection structure 300 can apply a certain elastic force to the clamping structure 200, so that the clamping structure 200 can still clamp the workpiece 10 in the clamping area normally, thereby preventing the workpiece 10 in the clamping area from leaving the clamping area under its own gravity.

[0040] It is understandable that, since the clamping structure 200 has a plurality of clamping parts 211 spaced apart, each clamping part 211 and the clamping surface 101 define a clamping area, the clamping area is used to clamp the workpiece 10, thereby enabling a single elastic connection structure 300 to cooperate with the clamping structure 200 to pre-clamp multiple workpieces 10 at the same time.

[0041] In some embodiments of this utility model, the clamping structure 200 further includes a hinge portion 221, a first driving portion 222, and a second driving portion 231. The hinge portion 221 is hinged to the base 100. The first driving portion 222 and the second driving portion 231 are both located on the side of the hinge portion 221 away from the clamping portion 211. The output end of the driving structure 400 is connected to the first driving portion 222. The elastic connection structure 300 is connected to the second driving portion 231 and the base 100 respectively.

[0042] For example, such as Figure 3 and Figure 4 As shown, the upper end of the clamping structure 200 is provided with a plurality of clamping parts 211, which are spaced apart in the left and right direction. The clamping structure 200 also has a hinge part 221, a first driving part 222 and a second driving part 231. The hinge part 221 is located below the clamping part 211 and is hinged to the base 100 so that the hinge part 221 can rotate around the left and right extending rotation axis. The first driving part 222 and the second driving part 231 are both provided below the hinge part 221. The driving structure 400 is provided on the base 100 and the output end of the driving structure 400 is connected to the first driving part 222. The opposite ends of the elastic connection structure 300 are respectively connected to the second driving part 231 and the base 100.

[0043] Understandably, under the elastic force of the elastic connection structure 300, the second drive part 231 can remain away from the seat 100, so that the clamping part 211 can remain close to the clamping surface 101, so that the clamping part 211 can cooperate with the clamping surface 101 to complete the pre-clamping of the workpiece 10 in the clamping area.

[0044] Under the drive of the drive structure 400, the first drive unit 222 can move closer to or further away from the seat 100 in the front-back direction, so that the clamping unit 211 can move further away from or closer to the clamping surface 101 in the front-back direction, thereby completing the release or clamping of the workpiece 10 in the clamping area.

[0045] Specifically, the elastic connection structure 300 includes a spring, with the opposite ends of the spring connected to the second drive unit 231 and the seat 100, respectively.

[0046] In a further embodiment of the present invention, the second driving part 231 is located on the side of the first driving part 222 away from the hinge part 221.

[0047] For example, such as Figure 4 As shown, the second drive unit 231 is located below the first drive unit 222.

[0048] It is understandable that the elastic force applied by the elastic connection structure 300 to the second drive part 231 is limited. By placing the second drive part 231 below the first drive part 222, the second drive part 231 can be further away from the hinge part 221, thereby enabling the elastic connection structure 300 to drive the clamping part 211 to more stably cooperate with the clamping surface 101 to complete the clamping and fixing of the workpiece 10 in the clamping area.

[0049] In a further embodiment of the present invention, the distance between the first driving part 222 and the hinge part 221 is greater than the distance between the clamping part 211 and the hinge part 221.

[0050] It is understandable that by setting the distance between the first driving part 222 and the hinge part 221 to be greater than the distance between the clamping part 211 and the hinge part 221, the entire clamping structure 200 is made to take the form of a force-saving lever. Under the premise that the elastic force provided by the elastic connection structure 300 is constant, the clamping part 211 has a greater clamping force on the workpiece 10 in the clamping area. Under the premise that the driving force applied by the driving structure 400 to the first driving part 222 is constant, the clamping part 211 also has a greater clamping force on the workpiece 10 in the clamping area.

[0051] In some embodiments of this utility model, the clamping structure 200 includes a pressing member 210, a first driving member 220, and a second driving member 230. One end of the first driving member 220 forms a hinge portion 221, and the other end of the first driving member 220 forms a first driving portion 222. One end of the second driving member 230 is detachably connected to the first driving portion 222, and the other end of the second driving member 230 forms a second driving portion 231. The pressing member 210 includes a connecting portion 212 and a plurality of clamping portions 211. The connecting portion 212 is detachably connected to the hinge portion 221. The plurality of clamping portions 211 are axially spaced along the rotation axis of the hinge portion 221 and are all connected to the connecting portion 212.

[0052] For example, such as Figure 3 and Figure 4 As shown, the clamping structure 200 includes a pressing member 210, a first driving member 220, and a second driving member 230. The upper end of the first driving member 220 forms a hinge portion 221, and the lower end of the first driving member 220 forms a first driving portion 222. The upper end of the second driving member 230 is detachably connected to the first driving portion 222, and the lower end of the second driving member 230 forms a second driving portion 231. The pressing member 210 includes a connecting portion 212 and a plurality of clamping portions 211. The plurality of clamping portions 211 are spaced apart in the left-right direction and are all connected to the connecting portion 212. The connecting portion 212 is detachably connected to the hinge portion 221.

[0053] It is understandable that since the clamping structure 200 includes a pressure member 210, a first driving member 220 and a second driving member 230, and the pressure member 210 is detachably connected to the first driving member 220 and the first driving member 220 is detachably connected to the second driving member 230, the pressure member 210, the first driving member 220 and the second driving member 230 can be manufactured separately and then assembled to form the clamping structure 200, which simplifies the manufacturing difficulty of the clamping structure 200.

[0054] Understandably, when installing the clamping structure 200 on the base 100, the operator can first hinge the hinge portion 221 of the first drive member 220 to the base 100, and then install the pressure member 210 and the second drive member 230 on the first drive member 220 respectively. When the hinge portion 221 is connected to the base 100, it is less affected by the clamping portion 211, and the installation of the clamping structure 200 on the base 100 is simpler.

[0055] It is understandable that, due to the multiple clamping parts 211 on the pressure member 210, a single pressure structure can simultaneously complete the clamping and fixing of multiple workpieces 10.

[0056] It should be noted that, due to the size differences between the various workpieces 10, when one of the clamping parts 211 clamps the workpiece 10 in the corresponding clamping area under the drive of the drive structure 400, there may be a certain gap between the other clamping parts 211 and the workpiece 10 in the corresponding clamping area. At this time, some clamping parts 211 may not clamp the workpiece 10 in the corresponding clamping area.

[0057] Based on the above problems, in some embodiments of this utility model, the clamping part 211 includes a pressing section 211a and an elastic connecting section 211b. The pressing section 211a extends perpendicularly to the clamping surface 101, and the elastic connecting section 211b is parallel to the clamping surface 101. The opposite ends of the elastic connecting section 211b are respectively connected to the connecting part 212 and the pressing section 211a. At least a portion of the structure of the elastic connecting section 211b near the clamping area abuts against the hinge part 221.

[0058] For example, such as Figure 5 As shown, the clamping part 211 includes a pressing section 211a and an elastic connecting section 211b. The pressing section 211a extends in the front-back direction, and the elastic connecting section 211b extends in the vertical direction. The upper end of the elastic connecting section 211b is connected to the front end of the pressing section 211a, and the lower end of the elastic connecting section 211b is connected to the connecting part 212.

[0059] It is understandable that the elastic connecting section 211b is designed so that after the pressing section 211a presses the workpiece 10 in the clamping area, the elastic connecting section 211b can generate a certain elastic deformation, so that the driving structure 400 can continue to drive the entire clamping structure 200 to rotate. This allows the pressing sections 211a of other clamping parts 211 to continue to approach and press the workpiece 10 in the clamping area, thereby enabling each clamping part 211 to firmly complete the clamping and fixing of the workpiece 10 in the corresponding clamping area.

[0060] It is understandable that, since at least a portion of the structure of the elastic connecting segment 211b near the pressing segment 211a abuts against the hinge portion 221, the elastic connecting segment 211b has higher strength under the assistance of the hinge portion 221, thereby reducing the probability of the elastic connecting segment 211b breaking.

[0061] In some embodiments of this utility model, reference is made to Figure 6 The drive structure 400 includes a cylinder 410, which is located at one end of the seat 100 away from the clamping structure 200. The seat 100 has a through hole, and the telescopic rod 411 of the cylinder 410 passes through the through hole and is connected to the first drive unit 222.

[0062] Understandably, cylinder 410 is inexpensive and provides significant driving force.

[0063] It is understandable that by placing the cylinder 410 at one end of the base 100 away from the clamping structure 200, there is sufficient space between the cylinder 410 and the first drive unit 222 to allow the telescopic rod 411 of the cylinder 410 to move, and the overall structure of the clamping fixture is simplified.

[0064] It is understandable that, since the cylinder 410 is located at the end of the base 100 away from the clamping structure 200, the end of the base 100 where the clamping structure 200 is installed has more space for placing workpieces. Under the premise that the size of the base 100 is fixed, the clamping fixture of this application can clamp more workpieces. Correspondingly, the processing space in the CNC machining equipment is limited. When the clamping fixture of this application is applied to the CNC machining equipment, since the clamping fixture of this application can clamp more workpieces under the premise that the size of the base 100 is fixed, the CNC machining equipment using the clamping fixture of this application can process more workpieces at a time, thereby increasing the working efficiency of the CNC machining equipment using the clamping fixture of this application.

[0065] Understandably, since the cylinder 410 is located at the end of the seat 100 away from the clamping structure 200, the distance between the cylinder 410 and the clamping structure 200 can be greater, thus allowing the cylinder 410 to be selected with a larger stroke, so that the cylinder 410 can apply a greater driving force to the clamping structure 200.

[0066] It should be noted that under the drive of cylinder 410, telescopic rod 411 moves in a straight line in the front-back direction. However, when clamping structure 200 rotates relative to seat 100, first drive part 222 will rotate synchronously around hinge part 221. That is, the movement track of first drive part 222 is an arc. If telescopic rod 411 of cylinder 410 is fixedly connected to first drive part 222, first drive part 222 will apply vertical load to telescopic rod 411 when it moves. Large stress load will be generated between first drive part 222 and telescopic rod 411, thereby damaging cylinder 410.

[0067] Based on the above problems, in a further embodiment of the present invention, the telescopic rod 411 of the cylinder 410 is provided with an elongated hole 411a, the extension direction of the elongated hole 411a is perpendicular to the axial direction of the hinge part 221, and an mounting shaft 223 is mounted on the first drive part 222, the mounting shaft 223 being slidably inserted into the elongated hole 411a.

[0068] For example, such as Figure 6 As shown, the front end of the telescopic rod 411 of the cylinder 410 is provided with a vertically extending elongated hole 411a. The hinge part 221 is rotatably connected to the seat body 100 around the left and right extending rotation axis. The first drive part 222 is provided with a left and right extending mounting shaft 223, which is slidably inserted into the elongated hole 411a.

[0069] It is understandable that when the cylinder 410 drives the telescopic rod 411 to move back and forth, the first drive part 222 will rotate around the hinge part 221. During this process, the mounting shaft 223 can slide up and down along the elongated hole 411a to reduce the load in the vertical direction between the first drive part 222 and the telescopic rod 411, thereby reducing the probability of damage to the cylinder 410.

[0070] In some embodiments of this utility model, reference is made to Figure 4 The base 100 also includes a protective sleeve 110, which is disposed in the clamping area. The protective sleeve 110 has a clamping channel that allows the workpiece 10 to pass through. The protective sleeve 110 has a deformable part. Under the push of the clamping part 211, the deformable part can deform into the clamping channel to squeeze the workpiece 10 in the clamping channel.

[0071] It is understandable that by setting the protective sleeve 110, the protective sleeve 110 can separate the clamping part 211 and the workpiece 10, thereby reducing the probability of wear between the workpiece 10 and the clamping part 211. On the one hand, it protects the workpiece 10 and improves the quality of the products processed from the workpiece 10, and on the other hand, it can extend the service life of the clamping structure 200.

[0072] The CNC machining equipment provided according to the second aspect of the present invention includes the clamping fixture provided in the first aspect of the present invention.

[0073] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A clamping fixture, characterized in that, include: The base has a clamping surface; A clamping structure is movably disposed on the base body. The clamping structure has a plurality of clamping parts spaced apart. Each clamping part defines a clamping area with the clamping surface. The clamping area is used to clamp the workpiece. An elastic connection structure is connected to the clamping structure and the base respectively, and is used to provide an elastic force to keep the clamping part close to the clamping area; A driving structure is disposed on the base and is drivenly connected to the clamping structure. The driving structure can drive the clamping structure to move relative to the base so that the clamping part moves closer to or further away from the clamping area.

2. The clamping fixture according to claim 1, characterized in that, The clamping structure further includes a hinge portion, a first driving portion, and a second driving portion. The hinge portion is hinged to the base body. The first driving portion and the second driving portion are both located on the side of the hinge portion away from the clamping portion. The output end of the driving structure is connected to the first driving portion. The elastic connection structure is connected to the second driving portion and the base body respectively.

3. A clamping fixture according to claim 2, characterized in that, The second drive unit is located on the side of the first drive unit that is away from the hinge unit.

4. A clamping fixture according to claim 3, characterized in that, The distance between the first driving part and the hinge part is greater than the distance between the clamping part and the hinge part.

5. A clamping fixture according to claim 3 or 4, characterized in that, The clamping structure includes a pressing component, a first driving component, and a second driving component. One end of the first driving component forms the hinge portion, and the other end of the first driving component forms the first driving portion. One end of the second driving component is detachably connected to the first driving portion, and the other end of the second driving component forms the second driving portion. The pressing component includes a connecting portion and a plurality of clamping portions. The connecting portion is detachably connected to the hinge portion. The plurality of clamping portions are axially spaced along the rotation axis of the hinge portion and are all connected to the connecting portion.

6. A clamping fixture according to claim 5, characterized in that, The clamping portion includes a pressing section and an elastic connecting section. The pressing section extends perpendicularly to the clamping surface, and the elastic connecting section is parallel to the clamping surface. The opposite ends of the elastic connecting section are respectively connected to the connecting portion and the pressing section. At least a portion of the structure of the elastic connecting section near the clamping area abuts against the hinge portion.

7. A clamping fixture according to claim 2, characterized in that, The driving structure includes a cylinder, which is located at one end of the seat away from the clamping structure. The seat has a through hole, and the telescopic rod of the cylinder passes through the through hole and is connected to the first driving part.

8. A clamping fixture according to claim 7, characterized in that, The cylinder's telescopic rod is provided with an elongated hole, the extension direction of which is perpendicular to the axial direction of the hinge. The first drive unit is equipped with an mounting shaft, which is slidably inserted into the elongated hole.

9. A clamping fixture according to claim 1, characterized in that, The base also includes a protective sleeve disposed within the clamping area. The protective sleeve has a clamping channel that allows the workpiece to pass through. The protective sleeve has a deformable part that, when pushed by the clamping part, can deform into the clamping channel to squeeze the workpiece within the clamping channel.

10. A CNC machining equipment, characterized in that, Includes the clamping fixture as described in any one of claims 1 to 9.

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