Pressing mechanism

Abstract

The utility model provides a hold-down mechanism, which is matched with a positioning seat on a working table and comprises a hold-down piece and a driving source, the hold-down piece comprises a hold-down end and a base end, and a power output shaft of the driving source is connected with the base end to drive the hold-down end of the hold-down piece to hold down or loosen a workpiece to be processed. The adjusting device at least partially acts on the pressing piece, and the pressing face P of the pressing end can be adjusted to be parallel to the positioning face M. Compared with the prior art, the adjusting device has the advantages that the pressing face P can be adjusted to be parallel to the positioning face M through the adjusting device, and therefore the situation that a workpiece is deformed due to the fact that lateral force is generated on the workpiece is avoided; and in addition, the device can be suitable for different workpieces, and when the same kind of workpieces are pressed, only the pressing face P needs to be adjusted to be parallel to the positioning face M for the first time.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a clamping mechanism. Background Art

[0002] like Figure 1 As shown, in actual production, the current clamping mechanism generally adopts a single-arm pressure plate 2' to clamp the workpiece 1'. Specifically, the pressure plate 2' is driven by the tension F' of the piston rod 31', and relies on a clamping portion 21' to clamp the workpiece 1'. In this process, the workpiece 1' will apply a thrust F" opposite to the tension F' to the pressure plate. Since the tension F' and the thrust F" are not collinear, they will jointly form a couple M'. The couple M' makes the pressure plate 2' tend to rotate away from the workpiece 1'. The piston rod 31' and the cylinder body 32' usually have a clearance fit. In particular, after long-term use, there will be a larger clearance between the piston rod 31' and the cylinder body 32'. Therefore, under the action of the couple M', the piston rod 31' is easy to tilt away from the workpiece 1' together with the pressure plate 2'. See Figure 2 , the dotted line in the figure indicates Figure 1 The local pressing plate 2' is at the position where the pressing plate 2' and the workpiece 1' have formed an inclination angle α', which makes the thrust F" applied by the workpiece 1' to the clamping portion 21' also inclined at the same angle as the inclination angle α' relative to the vertical direction, resulting in the clamping portion 21' generating a lateral force such as a friction force f' on the workpiece 1.

[0003] Since the clamped workpieces are mostly thin-walled parts, the lateral force applied by the traditional single-arm clamp on the workpiece can easily cause the workpiece to deform in the lateral direction, affecting the position of the workpiece processing hole, especially workpieces made of materials such as aluminum alloys with poor strength are more susceptible to the influence of the single-arm clamp. For this reason, a Chinese utility model "A double-point clamping workpiece fixture" with patent number ZL201821219615.3 (authorization announcement number CN208788056U) proposes that in addition to the independent single-point clamping structure, it also has a double-point clamping device located on another clamping plate. However, since its single-point clamping device and double-point clamping device are discrete structures, and the two pressure points of its double-point clamping device are located on the same side of the clamping device, it is impossible to offset the inclination of the clamping device and the clamping plate relative to the workpiece when the clamping plate is pressed downward, thereby being unable to prevent the clamping plate from exerting lateral force on the workpiece, so it is necessary to improve the existing technology. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a clamping mechanism capable of preventing lateral force from being generated on a workpiece in view of the above-mentioned existing technical status.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: the clamping mechanism cooperates with the positioning seat located on the workbench, including:

[0006] A pressing member, comprising a pressing end and a base end, wherein a pressing space for pressing the workpiece to be processed is formed between the pressing end and the positioning seat, and when the pressing member presses the workpiece to be processed, the pressing end is subjected to a force from the workpiece to be processed, so that the base end is closer to the positioning surface M of the positioning seat than the pressing end;

[0007] A driving source, whose power output shaft is connected to the base end of the pressing member, and is used to drive the pressing end of the pressing member to press or release the workpiece to be processed;

[0008] Features:

[0009] The workbench is provided with an adjusting device, which acts at least partially on the pressing member and can adjust the pressing surface P of the pressing end to be parallel to the positioning surface M of the positioning seat.

[0010] In order to adjust the pressing surface P to be parallel to the positioning surface M, preferably, the adjusting device includes a reference block and a first adjusting member, the reference block is arranged on the workbench and defines a reference surface N, the reference surface N is parallel to the positioning surface M, the pressing member has an axis A perpendicular to the pressing surface P, and the first adjusting member can cooperate with the reference block to act on the pressing member to adjust the axis A to be perpendicular to the reference surface N. Since there is an inherent perpendicular relationship between the axis A and the pressing surface P, and the reference surface N is parallel to the positioning surface M, when the axis A is perpendicular to the reference surface N, the pressing surface P and the positioning surface M can be guaranteed to be parallel to each other.

[0011] Furthermore, in order to achieve the ability to adjust the axis A to be perpendicular to the reference plane N, preferably, the clamping member extends from the base end toward a direction away from the clamping end to form an adjustment end, the reference block is located below the adjustment end and is arranged away from the positioning seat, and the first adjustment member can act on the adjustment end from the reference plane N, so that the adjustment end can be away from the reference plane N relative to the base end, thereby adjusting the axis A to be perpendicular to the reference plane N. Since in the process of the clamping end clamping the workpiece to be processed, if the first adjusting member does not exist, the adjusting end will be close to the reference plane N relative to the base end, so it is necessary to set the first adjusting member so that the adjusting end can be away from the reference plane N relative to the base end, so that the axis A can be perpendicular to the reference plane N; in addition, if during the adjustment process, the first adjusting member makes the adjusting end too far away from the reference plane N relative to the base end, it is only necessary to appropriately weaken the effect of the first adjusting member. Under the effect of the clamping end, the adjusting end will still be close to the reference plane N relative to the base end. Therefore, it is only necessary to consider how to make the adjusting end away from the reference plane N relative to the base end, and since the base end is connected to the power output shaft, the base end itself is in a relatively fixed state, and it is actually only necessary to consider how to make the adjusting end away from the reference plane N; finally, if only for the same type of workpiece to be processed, it is actually only necessary to set the first adjusting member to a non-adjustable structure fixed at the adjusting end. Such a design also makes the clamping mechanism applicable to different workpieces to be processed. When switching to testing different workpieces to be processed, it is only necessary to adjust in the first test.

[0012] Further design, in order to achieve that the adjustment end can be away from the reference plane N, preferably, a first mounting portion for mounting the first adjustment member is provided on the adjustment end, the first mounting portion forms the axis A, the first adjustment member is coaxially mounted in the first mounting portion with the axis A, the first adjustment member can move in the first mounting portion along the axis A, and the first adjustment member can conflict with the reference plane N so that the adjustment end can be away from the reference plane N relative to the base end. According to actual needs, for example, a structure can be adopted in which a first adjustment member that can be extended and retracted relative to the reference plane N is provided on the reference plane N to push the adjustment end away from the reference plane N, but such a setting is that the structure is relatively simple and easy to process, for example, the first mounting portion and the first adjustment member can be set to be screwed, and the adjustment is performed by screwing the first adjustment member deeper into the first mounting portion so that it conflicts with the reference plane N.

[0013] In order to enable the clamping member to deflect relative to the power output shaft, thereby having the ability to be adjusted, preferably, the base end is provided with a second mounting portion for inserting the power output shaft, and a gap d1 is provided between the power output shaft and the second mounting portion, and the gap d1 enables the base end to deflect relative to the power output shaft. With such a design, the entire clamping member can have a certain degree of deflection freedom relative to the power output shaft with the base end as a reference, so that the adjustment end can be close to or away from the reference plane N relative to the base end.

[0014] In order to connect the base end and the power output shaft, preferably, the base end is provided with a first through hole along the radial direction of the second mounting portion, and correspondingly, the power output shaft is provided with a second through hole opposite to the first through hole, and a pin is also provided on the base end, and the pin can be inserted into the first through hole and the second through hole at the same time, so as to connect the base end and the power output shaft. The pin can transmit the power of the power output shaft to the clamping member, and the second through hole can be set to have different specifications according to actual needs. For example, the second through hole is set to a larger specification than the pin, so that the deflection between the base end and the power output shaft has a relatively larger adjustment range; in addition, the use of the pin to connect the base end and the power output shaft also has other advantages. For example, the commonly used driving source of the clamping mechanism is an angle cylinder. The use of the pin is conducive to the rotational power of the transmission driving source, and can also prevent the base end from rotating with the power output shaft as the rotation axis when the first adjustment member and the base end are screw-tightly adjusted.

[0015] In order to be able to adjust the deflection range of the base end relative to the power output shaft, preferably, the power output shaft also includes an adjustment section, the adjustment section at least partially protrudes from the base end, and a second adjustment member is arranged on the adjustment section, and an adjustment space d2 is formed between the second adjustment member and the base end, and the second adjustment member can move on the adjustment section along the length direction of the power output shaft, thereby increasing or decreasing the adjustment space d2 to adjust the deflection range of the base end relative to the power output shaft. Since the base end will conflict with the second adjusting member during the process of deflection relative to the power output shaft, the range of deflection of the base end relative to the power output shaft can be adjusted by adjusting the size of the adjustment space d2; the purpose of the second adjusting member is to adjust the range of deflection of the base end relative to the power output shaft. This is for example because if the range of deflection of the base end relative to the power output shaft is too large, it may cause the clamping member as a whole to be too tilted relative to the power output shaft in the un-clamped state. Since the commonly used driving source of the clamping mechanism is the angle cylinder, the tilted clamping member may interfere with the workpiece to be processed during rotation; and if the range of deflection of the base end relative to the power output shaft is too small, it may make it difficult to adjust the clamping surface P to be parallel to the positioning surface M; in addition, in fact, the second adjusting member can also limit the freedom of movement of the base end relative to the power output shaft, but since the pin can also limit the freedom of movement of the base end relative to the power output shaft, the second adjusting member is more focused on adjusting the range of deflection of the base end relative to the power output shaft than the pin.

[0016] In order to prevent the positional relationship between the adjusting device, the pressing member and the power output shaft from changing during multiple pressings of the same workpiece to be processed, preferably, the first adjusting member is provided with a first locking member, which can lock the first adjusting member on the first mounting portion, and similarly, the second adjusting member is provided with a second locking member, which can lock the second adjusting member on the adjusting section. The first locking member and the second locking member can be components such as preload springs, preload washers or locking screws provided on bolts.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] 1. The clamping surface P and the positioning surface M can be adjusted to be parallel through the adjustment device, so as to prevent the lateral force on the workpiece from causing deformation of the workpiece;

[0019] 2. The adjusting device can make the clamping mechanism suitable for different workpieces, and when clamping the same kind of workpiece, it is only necessary to adjust the clamping surface P and the positioning surface M to be parallel for the first time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the clamping mechanism in the background technology when initially clamping the workpiece;

[0021] Figure 2 It is a schematic diagram of a state in which a pressing plate of a pressing mechanism in the background technology is in an inclined state relative to a workpiece;

[0022] Figure 3 It is a structural schematic diagram of the clamping mechanism in the embodiment of the utility model cooperating with the positioning seat on the workbench to clamp the workpiece to be processed;

[0023] Figure 4 This is a schematic diagram of the structural decomposition of the clamping mechanism in the embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the installation structure of the pressing member, the power output shaft, the second adjusting member and the pin member in the embodiment of the utility model;

[0025] Figure 6 This is a structural schematic diagram of the clamping mechanism and the positioning seat in the embodiment of the utility model;

[0026] Figure 7 This is a schematic diagram of the clamping mechanism in the initial state in the embodiment of the utility model;

[0027] Figure 8 It is a schematic diagram of another angle of the clamping mechanism in the embodiment of the utility model in the initial state;

[0028] Fig. 9 It is a schematic diagram of the state of the clamping mechanism in the embodiment of the utility model in the adjustment state;

[0029] Fig.10 It is a schematic diagram of another angle of the clamping mechanism in the embodiment of the utility model in the adjustment state;

[0030] Fig.11 It is a schematic diagram of the state of the clamping mechanism in the embodiment of the utility model in the final state. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] like Figures 3 to 6As shown, it is a preferred embodiment of the utility model. The clamping mechanism in this embodiment is used in conjunction with the positioning seat 12 located on the workbench 11, wherein the clamping mechanism includes a clamping member 2, and the clamping member 2 includes a clamping end 21 and a base end 22, wherein a clamping space 211 for clamping the workpiece 13 to be processed is formed between the clamping end 21 and the positioning seat 12. When the clamping member 2 clamps the workpiece 13 to be processed, the clamping end 21 is subjected to the force from the workpiece 13 to be processed, so that the base end 22 is closer to the positioning surface M of the positioning seat 12 than the clamping end 21. The clamping mechanism in this embodiment also includes a driving source 3, and the power output shaft 31 of the driving source 3 is connected to the base end 22 of the clamping member 2 to drive the clamping end 21 of the clamping member 2 to clamp or release the workpiece 13 to be processed. Furthermore, an adjusting device 4 is provided on the workbench 11, and the adjusting device 4 at least partially acts on the clamping member 2, and can adjust the clamping surface P of the clamping end 21 to be parallel to the positioning surface M of the positioning seat 12, thereby preventing the clamping member 2 from generating lateral force on the workpiece 13 to be processed and causing the workpiece 13 to be processed to deform.

[0033] In order to adjust the pressing surface P to be parallel to the positioning surface M, the adjusting device 4 includes a reference block 41 and a first adjusting member 42. The reference block 41 is arranged on the workbench 11 and defines a reference surface N. The reference surface N is parallel to the positioning surface M. The pressing member 2 has an axis A perpendicular to the pressing surface P. The first adjusting member 42 can cooperate with the reference block 41 to act on the pressing member 2 to adjust the axis A to be perpendicular to the reference surface N. Since there is an inherent vertical relationship between the axis A and the pressing surface P, and the reference surface N is parallel to the positioning surface M, when the axis A is perpendicular to the reference surface N, the pressing surface P and the positioning surface M can be guaranteed to be parallel to each other. Furthermore, in order to achieve the ability to adjust the axis A to be perpendicular to the reference plane N, the clamping member 2 extends from the base end 22 toward a direction away from the clamping end 21 to form an adjustment end 23, the reference block 41 is located below the adjustment end 23 and is arranged away from the positioning seat 12, and the first adjustment member 42 can act on the adjustment end 23 from the reference plane N, so that the adjustment end 23 can be away from the reference plane N relative to the base end 22, thereby adjusting the axis A to be perpendicular to the reference plane N. Since in the process of the clamping end 21 clamping the workpiece 13 to be processed, if the first adjustment member 42 is not present, the adjustment end 23 will be close to the reference plane N relative to the base end 22, so it is necessary to set the first adjustment member 42 so that the adjustment end 23 can be away from the reference plane N relative to the base end 22, so that the axis A can be perpendicular to the reference plane N. In addition, if during the adjustment process, the first adjustment member 42 causes the adjustment end 23 to be too far away from the reference plane N relative to the base end 22, it is only necessary to appropriately weaken the effect of the first adjustment member 42. Under the action of the clamping end 21, the adjustment end 23 will still be close to the reference plane N relative to the base end 22. Therefore, it is only necessary to consider how to make the adjustment end 23 away from the reference plane N relative to the base end 22. Moreover, since the base end 22 is connected to the power output shaft 31, the base end 22 itself is in a relatively fixed state. In fact, it is only necessary to consider how to make the adjustment end 23 away from the reference plane N.

[0034] Specifically, see Figure 4 , a first mounting portion 231 for mounting a first adjusting member 42 is provided on the adjusting end 23, the first mounting portion 231 is formed with an axis A, the first adjusting member 42 is coaxially mounted in the first mounting portion 231 with the axis A, and the first adjusting member 42 can move along the axis A in the first mounting portion 231. Therefore, the first adjusting member 42 can come into contact with the reference plane N so that the adjusting end 23 can be away from the reference plane N relative to the base end 22. In this embodiment, the first adjusting member 42 and the first mounting portion 231 are matched in a screw-tight manner, wherein the first adjusting member 42 is a bolt, and can move along the axis A in the first mounting portion 231 by screwing in or out.

[0035] See also Figure 5In order to realize that the pressing member 2 can deflect relative to the power output shaft 31, so as to have the ability to be adjusted, the base end 22 is provided with a second mounting portion 221 for inserting the power output shaft 31, and a gap d1 is provided between the power output shaft 31 and the second mounting portion 221. The existence of the gap d1 enables the base end 22 to deflect relative to the power output shaft 31. With such a design, the entire pressing member 2 can have a certain degree of deflection freedom relative to the power output shaft 31 with the base end 22 as a reference, so that the adjustment end 23 can approach or move away from the reference plane N relative to the base end 22. The base end 22 is also provided with a first through hole 222 along the radial direction of the second mounting portion 221. Correspondingly, the power output shaft 31 is provided with a second through hole 311 opposite to the first through hole 222. The base end 22 is also provided with a pin 5, which can be inserted into the first through hole 222 and the second through hole 311 at the same time, so as to connect the base end 22 and the power output shaft 31. The pin 5 can transmit the power of the power output shaft 31 to the clamping member 2, and the second through hole 311 can be set to have different specifications according to actual needs. For example, the second through hole 311 is set to a larger specification than the pin 5, so that the deflection between the base end 22 and the power output shaft 31 has a relatively larger adjustment range. In addition, the driving source 3 in this embodiment is a rotary cylinder commonly used in a clamping mechanism. Therefore, the use of the pin 5 to connect the base end 22 and the power output shaft 31 is also conducive to the transmission of the rotational power of the driving source 3. Similarly, the pin 5 can also prevent the base end 22 from rotating with the power output shaft 31 as the rotation axis when the first adjustment member 42 is screwed in or out of the first mounting portion 231. The pin 5 in this embodiment is also provided with retaining springs 51 at both ends to limit the pin 5 axially.

[0036] See also Figure 6In order to adjust the deflection range of the base end 22 relative to the power output shaft 31, the power output shaft 31 further includes an adjustment section 312, the adjustment section 312 at least partially protrudes from the base end 22, a second adjustment member 43 is provided on the adjustment section 312, an adjustment space d2 is formed between the second adjustment member 43 and the base end 22, and the second adjustment member 43 can move along the length direction of the power output shaft 31 on the adjustment section 312, thereby increasing or decreasing the adjustment space d2 to adjust the deflection range of the base end 22 relative to the power output shaft 31. The second adjustment member 43 in this embodiment is a nut, and a thread matching the second adjustment member 43 is provided on the adjustment section 312. Since the base end 22 will conflict with the second adjustment member 43 during the deflection process relative to the power output shaft 31, the deflection range of the base end 22 relative to the power output shaft 31 can be adjusted by adjusting the size of the adjustment space d2. If the deflection range of the base end 22 relative to the power output shaft 31 is too large, the clamping member 2 as a whole may be too tilted relative to the power output shaft 31 in the un-clamped state. Since the driving source 3 is an angle cylinder, the tilted clamping member 2 may interfere with the workpiece 13 to be processed during rotation. If the deflection range of the base end 22 relative to the power output shaft 31 is too small, it may be difficult to adjust the clamping surface P to be parallel to the positioning surface M.

[0037] Due to the existence of the adjustment device 4, the clamping mechanism in this embodiment can be applied to different workpieces 13 to be processed. When switching to test a different workpiece 13 to be processed, it is only necessary to adjust it in the first test. Therefore, in order to prevent the positional relationship between the adjustment device 4, the clamping member 2 and the power output shaft 31 from changing during multiple tests, a first locking member 421 is provided on the first adjustment member 42, and the first locking member 421 can lock the first adjustment member 42 on the first mounting portion 231. Similarly, a second locking member 431 is provided on the second adjustment member 43, and the second locking member 431 can lock the second adjustment member 43 on the adjustment section 312. The first locking member 421 in this embodiment is a pre-tightening nut, and the second locking member 431 is a locking screw.

[0038] The use process of the clamping mechanism provided in this embodiment is as follows:

[0039] See also Figure 7 and Figure 8At this time, the clamping mechanism is in the initial state, and the clamping member 2 is in the initial position. Since the driving source 3 is an angle cylinder, the clamping member 2 in the initial position and the clamping member 2 in the clamping position form an angle relationship of 90°. In addition, under the action of gravity, due to the existence of the gap d1, the clamping member 2 will deflect relative to the power output shaft 31 at this time, and the deflection range is limited by the adjustment space d2 formed between the second adjustment member 43 and the base end 22. Subsequently, driven by the driving source 3, the clamping member 2 will rotate in the direction R with the power output shaft 31 as the rotation axis, so that the clamping end 21 clamps the workpiece 13 to be processed; see Fig. 9 and Fig.10 At this time, the clamping mechanism is in the adjustment state. At this time, the clamping surface P of the clamping end 21 has contacted with the workpiece 13 to be processed, and the clamping end 21 and the positioning seat 12 have clamped the workpiece 13 to be processed. However, it is obvious that the axis A is not perpendicular to the reference plane N at this time, so the clamping surface P is not parallel to the positioning surface M, and the adjustment device 4 is required for adjustment. Fig.10 The adjusting end 23 is too close to the reference plane N relative to the base end 22, so the main purpose of adjustment is to screw the first adjusting member 42 deeper into the first mounting portion 231 so that the first adjusting member 42 contacts the reference plane N, so that the adjusting end 23 is away from the reference plane N relative to the base end 22; see Fig.11 At this time, under the adjustment of the adjustment device 4, the clamping mechanism is in the final state. Fig.10 Obviously, the first adjustment member 42 is now deeper into the first mounting portion 231, and the axis A is perpendicular to the reference plane N, that is, the clamping surface P is parallel to the positioning surface M, which can prevent the lateral force between the clamping surface P and the workpiece 13 to be processed from deforming the workpiece 13. In addition, it should be noted that, according to actual needs, before adjusting the first adjustment member 42, the driving source 3 can be loosened, and the first adjustment member 42 can be adjusted when the clamping member 2 is in the initial position, which will be more labor-saving. Finally, for the same workpiece 13 to be processed, it is only necessary to adjust it during the first test. Therefore, if different workpieces to be processed need to be tested, they only need to be adjusted during the corresponding first test.

Claims

1. A clamping mechanism, cooperating with a positioning seat (12) located on a workbench (11), comprising: A pressing member (2) comprises a pressing end (21) and a base end (22); a pressing space (211) for pressing a workpiece (13) to be processed is formed between the pressing end (21) and the positioning seat (12); when the pressing member (2) presses the workpiece (13) to be processed, the pressing end (21) is subjected to a force from the workpiece (13) to be processed, so that the base end (22) is closer to a positioning surface (M) of the positioning seat (12) than the pressing end (21); A driving source (3), whose power output shaft (31) is connected to the base end (22) of the pressing member (2) and is used to drive the pressing end (21) of the pressing member (2) to press or release the workpiece (13) to be processed; Features: The workbench (11) is provided with an adjusting device (4), which at least partially acts on the clamping member (2) and is capable of adjusting the clamping surface (P) of the clamping end (21) to be parallel to the positioning surface (M) of the positioning seat (12).

2. The clamping mechanism according to claim 1, Features: The adjustment device (4) comprises a reference block (41) and a first adjustment member (42); the reference block (41) is arranged on the workbench (11) and defines a reference plane (N); the reference plane (N) is parallel to the positioning plane (M); the clamping member (2) has an axis (A) perpendicular to the clamping surface (P); the first adjustment member (42) can cooperate with the reference block (41) to act on the clamping member (2) to adjust the axis (A) to be perpendicular to the reference plane (N).

3. The clamping mechanism according to claim 2, Features: The clamping member (2) extends from the base end (22) in a direction away from the clamping end (21) to form an adjustment end (23); the reference block (41) is located below the adjustment end (23) and is arranged away from the positioning seat (12); the first adjustment member (42) can act on the adjustment end (23) from the reference plane (N) so that the adjustment end (23) can be away from the reference plane (N) relative to the base end (22), thereby adjusting the axis (A) to be perpendicular to the reference plane (N).

4. The clamping mechanism according to claim 3, Features: The adjusting end (23) is provided with a first mounting portion (231) for mounting the first adjusting member (42); the first mounting portion (231) is formed with the axis (A); the first adjusting member (42) is coaxially mounted in the first mounting portion (231) with the axis (A); the first adjusting member (42) is movable in the first mounting portion (231) along the axis (A); the first adjusting member (42) is capable of contacting the reference plane (N) so that the adjusting end (23) can be moved away from the reference plane (N) relative to the base end (22).

5. The clamping mechanism according to claim 4, Features: The base end (22) is provided with a second mounting portion (221) for inserting the power output shaft (31), and a gap (d 1 ), the gap (d 1 ) enables the base end (22) to deflect relative to the power output shaft (31).

6. The clamping mechanism according to claim 5, Features: The base end (22) is provided with a first through hole (222) along the radial direction of the second mounting portion (221); correspondingly, the power output shaft (31) is provided with a second through hole (311) opposite to the first through hole (222); a pin (5) is also provided on the base end (22); the pin (5) can be inserted into the first through hole (222) and the second through hole (311) at the same time, so as to connect the base end (22) and the power output shaft (31).

7. The clamping mechanism according to claim 6, Features: The power output shaft (31) further comprises an adjustment section (312), wherein the adjustment section (312) at least partially protrudes from the base end (22), and a second adjustment member (43) is arranged on the adjustment section (312), and an adjustment space (d) is formed between the second adjustment member (43) and the base end (22). 2 ), the second adjusting member (43) can move on the adjusting section (312) along the length direction of the power output shaft (31), thereby increasing or decreasing the adjusting space (d 2 ) to adjust the range of deflection of the base end (22) relative to the power output shaft (31).

8. The clamping mechanism according to claim 7, Features: The first adjusting member (42) is provided with a first locking member (421), and the first locking member (421) is capable of locking the first adjusting member (42) on the first mounting portion (231). Similarly, the second adjusting member (43) is provided with a second locking member (431), and the second locking member (431) is capable of locking the second adjusting member (43) on the adjusting section (312).

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