A lever difference compensation pressing and clamping jig

Abstract

The utility model relates to press fit clamping fixture technical field, concretely relates to a rod lever compensating press fit clamping fixture, including jig main part and at least two workpiece positioning mechanisms of setting on the jig main part, be equipped with one press two mechanism between two adjacent workpiece positioning mechanisms on the jig main part, one press two mechanism includes linear driver one and two opposite pressing plate, and the pressing plate is connected with linear driver one or jig main part through hinged structure, and the telescopic drive shaft of linear driver one is connected with the pressing plate link that is hinged with the pressing plate in first axis Y direction activity respectively, and the pressing plate link is equipped with the press fit rotation guide difference compensation component that makes two pressing plates be in different height press fit position and is contacted with the pressing plate opposite end downside activity respectively, thereby. Two opposite pressing plate and press fit rotation guide difference compensation component in the utility model one press two mechanism, and the relative position is adjusted automatically in the process of pressing, and the workpiece of not equal height is pressed simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of pressing and clamping fixtures, and more specifically, to a lever-assisted pressing and clamping fixture. Background Technology

[0002] As the manufacturing industry moves towards higher precision and efficiency, the importance of machining fixtures and clamping technologies is becoming increasingly prominent. In the manufacturing process, clamping fixtures are generally tools used to fix, position, and support the parts to be processed.

[0003] For example, in the mass production of watches, traditional single-station clamping jigs require repeated assembly and disassembly of watch cases, loading and unloading, positioning and calibration, etc., resulting in a large proportion of non-processing time and low efficiency. Existing technologies generally use the lever principle to fix multiple parts, but existing lever solutions cannot meet the need to simultaneously clamp parts of different heights, which has limitations in practical applications. Utility Model Content

[0004] In view of this, the present invention provides a lever-assisted differential pressing and clamping fixture, which aims to solve the above-mentioned technical problems.

[0005] This utility model discloses a lever-type differential pressing and clamping fixture, comprising a fixture body and at least two workpiece positioning mechanisms disposed on the fixture body. A pressing mechanism is provided on the fixture body between two adjacent workpiece positioning mechanisms. The pressing mechanism includes a linear actuator and two pressure plates facing opposite directions. The pressure plates are connected to the linear actuator or the fixture body via a hinge structure. Pressure plate connecting members are connected to the telescopic drive shaft of the linear actuator, respectively hinged to the pressure plates in the first axis Y direction. The pressure plate connecting members are provided with pressing rotation guide differential compensation components that respectively make movable contact with the lower inner side of the pressure plates facing opposite directions, thereby placing the two pressure plates in different height pressing positions.

[0006] In some embodiments of this application, the pressing rotary guide differential compensation component is cylindrical, and the inner ends of the two pressure plates each have arcuate convex surfaces. The pressing rotary guide differential compensation component and the arcuate convex surfaces are in tangential contact. A through-shaft hole is provided on the pressure plate connector for the pressing rotary guide differential compensation component to pass through. The inner diameter of the through-shaft hole is larger than the outer diameter of the pressing rotary guide differential compensation component.

[0007] In some embodiments of this application, a pressure plate compensation adjustment structure is provided between the pressure plate connector and the pressure plate. At least a portion of the pressure plate compensation adjustment structure is provided on the pressure plate connector, and the remaining portion is provided on the pressure plate. The at least portion and the remaining portion of the pressure plate compensation adjustment structure are interlocked and either the at least portion or the remaining portion can be displaced relative to the other in the first axis Y direction.

[0008] In some embodiments of this application, the pressure plate differential adjustment structure includes a strip-shaped through hole and a through shaft. Either the strip-shaped through hole or the through shaft is disposed on the pressure plate connector, and the other is disposed on the pressure plate. The pressing rotation guide differential adjustment component and the through shaft are arranged in an inverted triangle.

[0009] In some embodiments of this application, a support top frame is also connected to the telescopic drive shaft of the linear driver, the top of the support top frame is located below the pressing rotation guide differential compensation member, and the support top frame and the pressure plate connector are linearly movable in the direction of the second axis X perpendicular to the first axis Y.

[0010] In some embodiments of this application, a plurality of strip-shaped through holes are provided on the pressure plate connector, and a through shaft is provided on the support top frame through the strip-shaped through holes. The through shaft and the pressing rotation guide differential compensation component are arranged in an equilateral triangle.

[0011] In some embodiments of this application, a recessed clearance groove is provided on the top of the support frame, and at least a portion of the pressure plate connector is located in the recessed clearance groove.

[0012] In some embodiments of this application, the hinge structure includes a linkage support arm, the lower end of which is hinged to the linear actuator or the fixture body, and the upper end of which is hinged to the corresponding pressure plate.

[0013] In some embodiments of this application, the workpiece positioning mechanism includes a workpiece square locator, on which positioning references are provided in multiple orientations, and a lateral clamping block is provided on the circumferential side of the workpiece square locator away from the positioning references, the lateral clamping block being connected to a toe-clamping cylinder.

[0014] In some embodiments of this application, the workpiece positioning mechanism further includes a side clamping plate that is linearly distributed with the first and second clamping mechanisms. The middle part of the side clamping plate is hinged to the second linear actuator via a hinge arm, and the telescopic shaft of the second linear actuator is hinged to the outer end of the side clamping plate.

[0015] Compared with the prior art, the beneficial effect of this utility model is that a pressing mechanism is set between two workpiece positioning mechanisms. The two pressing plates of the pressing mechanism, facing opposite directions, are driven to open or close by a linear actuator. First, the pressing plates are connected to the linear actuator or the main body of the fixture through a hinge structure, so that both ends of the pressing plates can rotate around the connection point with the hinge structure under the action of external force, thus forming a lever structure. At the same time, one end of the pressing plate is connected to the telescopic drive shaft of the linear actuator through a pressing plate connector that moves in the first axis Y direction. When the telescopic drive shaft retracts, the other end of the pressing plate is driven upward by the pressing plate connector, and when the telescopic drive shaft extends, the other end of the pressing plate is driven downward by the pressing plate connector. Secondly, the pressure plate connector is provided with a pressing rotation guide differential compensation component that is in movable contact with the lower inner side of the two pressure plates respectively, so that the two pressure plates are in different height pressing positions. The pressing rotation guide differential compensation component is in movable contact with the pressure plates. During the process of the two pressure plates pressing the workpieces of different heights, the component adjusts its relative position with the pressure plates by itself, so that the workpieces of different heights are pressed at the same time. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of the overall structure of a lever-type differential pressing and clamping fixture provided in this embodiment of the utility model; Figure 2 A top view of a lever-type differential pressing and clamping fixture provided in an embodiment of this utility model; Figure 3 Provided for the embodiments of this utility model Figure 2 A cross-sectional view along the AA direction; Figure 4 A three-dimensional structural diagram of the one-press-two-mechanism provided for an embodiment of this utility model; Figure 5 A front view of the one-press-two mechanism provided in an embodiment of this utility model; Figure 6 A cross-sectional view of the one-press-two mechanism provided in an embodiment of this utility model; Figure 7 A three-dimensional structural diagram of the side clamping plate, hinge arm, and linear actuator II provided in an embodiment of this utility model; Figure 8 A three-dimensional structural diagram of the workpiece square locator, positioning reference, and lateral clamping block provided for embodiments of this utility model; Figure 9This is a schematic diagram of the structure of the pressure plate connector provided in an embodiment of the present utility model; Figure 10 This is a schematic diagram of the structure of the pressing rotational guide differential compensation component provided in an embodiment of the present utility model; Figure 11 This is a schematic diagram of the supporting top frame provided in an embodiment of the present utility model.

[0017] In the diagram: 1. Fixture body; 2. Workpiece positioning mechanism; 21. Workpiece square locator; 211. Positioning datum; 212. Lateral clamping block; 22. Toe clamping cylinder; 3. One-press-two mechanism; 31. Linear actuator one; 32. Pressure plate; 321. Arc convex surface; 33. Pressure plate connector; 331. Through shaft hole; 332. Through shaft one; 333. Strip through hole two; 334. Strip through hole one; 34. Pressing rotation guide correction differential compensation component; 341. Limiting anti-detachment part; 35. Support top frame; 351. Through shaft two; 352. Recessed clearance groove; 36. Linkage support arm; 41. Side clamping plate; 42. Hinge arm; 43. Linear actuator two. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0019] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Example 1, combined with Figure 1 , Figure 2 , Figure 3 As shown, this embodiment provides a lever-type differential pressing and clamping fixture, including a fixture body 1 and at least two workpiece positioning mechanisms 2 disposed on the fixture body 1. A pressing mechanism 3 is provided on the fixture body 1 between two adjacent workpiece positioning mechanisms 2. The pressing mechanism 3 includes a linear actuator 31 and two opposing pressure plates 32. The two opposing pressure plates 32 are driven by the linear actuator 31 to open or press against an adjacent workpiece positioning mechanism 2. The pressure plates 32 are connected to the linear actuator 31 or the fixture body 1 via a hinge structure, and the hinge structure limits the travel of the pressure plates 32 in a direction perpendicular to the third axis Z, where the third axis Z is perpendicular to the plane formed by the first axis Y and the second axis X. A pressure plate connector 33 is connected to the telescopic drive shaft of the linear actuator 31. The connector is movably hinged to the pressure plate 32 in the first axis Y direction. The pressure plate connector 33 is provided with a pressing rotation guide correction difference compensation component 34 that is movably contacted with the lower side of the inner end of the pressure plate 32 so that the two pressure plates 32 are in different height pressing positions.

[0023] It is understandable that the pressure plate 32 is connected to the linear actuator 31 or the fixture body 1 via a hinge structure, allowing both ends of the pressure plate 32 to rotate around the connection point with the hinge structure under the action of external force, thus forming a lever structure. Simultaneously, one end of the pressure plate 32 is connected to the telescopic drive shaft of the linear actuator 31 via a pressure plate connector 33 that moves in the first axis Y direction. This means that when the telescopic drive shaft retracts, the other end of the pressure plate 32 is lifted by the pressure plate connector 33; when the telescopic drive shaft extends, the other end of the pressure plate 32 is pressed down by the pressure plate connector 33. Since both pressure plates 32 are driven by the linear actuator 31 and face opposite directions, the simultaneous clamping of the workpiece positioning mechanisms 2 on both sides is achieved through the linear actuator 31 and the lever structure.

[0024] Combination Figure 4 , Figure 5 , Figure 6 and Figure 10As shown, preferably, the pressing rotary guide differential compensation member 34 is cylindrical, and the inner ends of the two pressure plates 32 each have an arc-shaped convex surface 321, with the pressing rotary guide differential compensation member 34 and the arc-shaped convex surface 321 in tangential contact. A through-hole 331 is provided on the pressure plate connector 33 for the pressing rotary guide differential compensation member 34 to pass through, and the inner diameter of the through-hole 331 is larger than the outer diameter of the pressing rotary guide differential compensation member 34.

[0025] Understandably, since the pressure plate 32 is connected to the linear actuator 31 or the fixture body 1 by a hinge structure, the hinge structure restricts the travel of the pressure plate 32 in the third axis Z direction. Therefore, when the pressure plate 32 is extended in the third axis Z direction by the telescopic drive end of the linear actuator 31 and the two ends of the pressure plate 32 are not on the same horizontal line, the pressure plate 32 moves in the first axis Y direction under the traction of the hinge structure. At least a portion of the arcuate convex surface 321 of the pressure plate 32 rotates and fits against the pressing rotational guide correction compensation member 34, preventing the pressure plate 32 from colliding with the pressing rotational guide correction compensation member 34 when it moves in the first axis Y direction.

[0026] Combination Figure 4 , Figure 5 , Figure 6 , Figure 9 As shown, preferably, a pressure plate compensation adjustment structure is provided between the pressure plate connector 33 and the pressure plate 32. At least part of the pressure plate compensation adjustment structure is provided on the pressure plate connector 33, and the remaining part is provided on the pressure plate 32. The at least part and the remaining part of the pressure plate compensation adjustment structure are interlocked and either the at least part or the remaining part can be displaced relative to the other in the first axis Y direction.

[0027] Understandably, the pressure plate differential adjustment structure optimizes the fit between the pressure plate 32 and the pressure plate connector 33, ensuring that both can better adapt to different pressure requirements during use. At least part and the remaining part of the pressure plate differential adjustment structure can interlock, and either part can be displaced relative to the other in the first axis Y direction. This allows the two pressure plates 32 to be finely adjusted relative to the pressure plate connector 33 in the first axis Y direction, facilitating the two pressure plates 32 to find the appropriate position to simultaneously clamp workpieces of unequal height on both sides during the clamping process.

[0028] Preferably, the pressure plate differential adjustment structure includes a strip-shaped through hole 334 and a through shaft 332. The diameter of the strip-shaped through hole 334 in the first axis Y direction is larger than the diameter of the through shaft 332, and the diameter of the strip-shaped through hole 334 in the third axis Z direction is larger than the diameter of the through shaft 332, so as to provide the through shaft 332 with room for movement in the first axis Y and the third axis Z directions. Either the strip-shaped through hole 334 or the through shaft 332 is provided on the pressure plate connector 33, and the other is provided on the pressure plate 32. The pressing rotation guide differential adjustment component 34 and the through shaft 332 are arranged in an inverted triangle.

[0029] Understandably, the pressure plate 32 and the pressure plate connector 33 can be flexibly adjusted through the cooperation of the strip-shaped through hole 334 and the through shaft 332. Furthermore, the pressing rotation guide differential compensation component 34 and the through shaft 332 are arranged in an inverted triangle, which helps to provide better guidance and positioning during the pressing process, reducing errors and improving pressing quality. The inverted triangle distribution structure not only enhances stability but also improves the accuracy during the pressing process.

[0030] Combination Figure 4 and Figure 5 As shown, preferably, a support top frame 35 is also connected to the telescopic drive shaft of the linear actuator 31. The top of the support top frame 35 is located below the pressing rotation guide correction differential member 34, and the support top frame 35 and the pressure plate connector 33 are linearly and movably connected in the direction of the second axis X perpendicular to the first axis Y.

[0031] Understandably, the support top frame 35 is connected to the telescopic drive shaft, and its top is located below the pressing rotary guide differential compensation component 34, which plays a supporting role and ensures the stability and reliability of the entire fixture. The support top frame 35 has an arc circumference tangent to the pressing rotary guide differential compensation component 34. The support top frame 35 rises to lift the pressing rotary guide differential compensation component 34 and continue to apply pressure to the two pressure plates 32. When the workpieces on the two workpiece positioning mechanisms 2 are not at the same height, because there is a gap between the inner diameter of the through hole 331 and the outer diameter of the pressing rotary guide differential compensation component 34, combined with the support top frame 35, as well as the synergistic effect of the strip through hole 334 and the through shaft 332, the frictional force drives the pressing rotary guide differential compensation component 34 to rotate and find the corresponding position by itself. At this time, the two pressure plates 32 are widened due to the displacement of the pressing rotary guide differential compensation component 34, and finally the workpieces on the two workpiece positioning mechanisms 2 are pressed at the same height.

[0032] The linear movable connection between the support frame 35 and the pressure plate connector 33 in the direction of the second axis X perpendicular to the first axis Y increases the stability and flexibility of the fixture, improves the accuracy and reliability in the pressing process, and enables it to adapt to different working conditions and requirements.

[0033] Combination Figure 5 and Figure 11 As shown, preferably, a recessed relief groove 352 is provided on the top of the support top frame 35, and at least a portion of the pressure plate connector 33 is located in the recessed relief groove 352. The pressure plate connector 33 is provided with a plurality of strip-shaped through holes 333, and the support top frame 35 is provided with a through shaft 351 that passes through each of the strip-shaped through holes 333. The through shaft 351 and the pressing rotation guide differential compensation member 34 are arranged in an equilateral triangle.

[0034] It is understood that at least a portion of the pressure plate connector 33 and the top of the support top frame 35 are connected by the interlocking of the recessed relief groove 352, the second strip through hole 333 and the second through shaft 351, ensuring a firm connection between the pressure plate connector 33 and the support top frame 35.

[0035] Simultaneously, since the arcuate convex surfaces 321 on the relatively inner sides of the two pressure plates 32 are tangent to the pressing rotational guiding differential compensation component 34, when the relatively inner sides of the two pressure plates 32 are driven downward by the linear actuator 31 and are at the same horizontal line, at least a portion of the relatively inner sides of the two pressure plates 32 extends above the pressing rotational guiding differential compensation component 34. At this time, the telescopic drive end of the linear actuator 31 continues downward and drives the through shaft 351 on the support top frame 35 to move downward. The pressure plate connector 33 is provided with a strip-shaped through hole 333, so that the through shaft 351 on the support top frame 35 moves downward within the strip-shaped through hole 333, and the pressure plate connector 33 remains in a fixed position and remains relatively stable with at least a portion of the relatively inner sides of the two pressure plates 32, thereby ensuring that the two pressure plates 32 maintain a horizontal guiding state after opening. The setting of the strip-shaped through hole 333 ensures that the two pressure plates 32 can maintain relative stability after reaching a horizontal guiding state during the opening process.

[0036] Furthermore, the through shaft 2 351 and the press-fit rotary guide differential compensation component 34 are arranged in an equilateral triangle, which not only enhances the stability of the structure, but also ensures uniform stress distribution and avoids stress concentration.

[0037] Combination Figure 10 , Figure 11 As shown, specifically, the two ends of the support top frame 35 have arc circumferential surfaces, and the two ends of the pressing rotation guide differential compensation component 34 have limiting anti-detachment parts 341.

[0038] It is understandable that the arcuate convex surfaces 321 of the opposing inner ends of the two pressure plates 32 and the arcuate circumferential surface of one end of the supporting top frame 35 extend into the limiting and anti-detachment part 341 of the pressing rotation guide differential compensation component 34, and are tangent to the side of the pressing rotation guide differential compensation component 34. The setting of the limiting and anti-detachment part 341 can prevent the pressure plates 32, pressure plate connectors 33 and supporting top frame 35 from displacement in the direction of the second axis X perpendicular to the first axis Y, ensuring the overall stability and safety of the lever differential pressing clamping fixture.

[0039] Combination Figure 1 , Figure 3 and Figure 4 As shown, preferably, the hinge structure includes a linkage support arm 36, the lower end of which is hinged to the linear actuator 31 or the fixture body 1, and the upper end of which is hinged to the corresponding pressure plate 32.

[0040] Understandably, the hinged structure is used to transmit power. Since one end of the pressure plate 32 is connected to the telescopic drive end of the linear actuator 31 through the pressure plate connector 33 and the support top frame 35, one end of the pressure plate 32 moves in the third axis Z direction following the telescopic drive end of the linear actuator 31. Because the movement distance of the pressure plate 32 in the third axis Z direction is limited by the linkage support arm 36, when one end of the pressure plate 32 exceeds the movement distance limit in the third axis Z direction, the movement in the third axis Z direction is converted into movement in the first axis Y direction through the hinged mechanism, preventing the pressure plate 32 from completely following the telescopic drive end, thereby ensuring the normal operation of the lever structure.

[0041] Combination Figure 1 , Figure 3 and Figure 8 As shown, preferably, the workpiece positioning mechanism 2 includes a workpiece square locator 21, on which positioning references 211 in multiple positions are provided, and a lateral clamping block 212 is provided on the side of the workpiece square locator 21 away from the positioning references 211 in the circumferential direction, and the lateral clamping block 212 is connected to the toe-clamping cylinder 22.

[0042] Specifically, the positioning references 211 are distributed in an L-shape and there can be two of them, while there are two lateral clamping blocks 212 corresponding to each positioning reference 211.

[0043] Understandably, the positioning reference 211 of the workpiece square locator 21 can provide support and positioning for the workpiece. When clamping the workpiece, first, the two sides of the workpiece are aligned with the L-shaped positioning reference 211. Then, the lateral clamping block 212 is driven by the toe-clamping cylinder 22 to move closer to the opposite positioning reference 211 until the workpiece is completely clamped. Conversely, the lateral clamping block 212 is driven away from the opposite positioning reference 211 by the toe-clamping cylinder 22 to cancel the clamping of the workpiece.

[0044] Combination Figure 7 As shown, preferably, the workpiece positioning mechanism 2 further includes a side pressing plate 41 that is linearly distributed with the first pressing mechanism 3. The middle part of the side pressing plate 41 is hinged to the second linear actuator 43 through a hinge arm 42, and the telescopic shaft of the second linear actuator 43 is hinged to the outer end of the side pressing plate 41.

[0045] It is understandable that the telescopic shaft of the linear actuator 43 is hinged to the outer end of the side clamping plate 41, providing the side clamping plate 41 with driving force in the third axis Z direction. At the same time, the middle part of the side clamping plate 41 is hinged to the linear actuator 43 through the hinge arm 42, so that when the outer end of the side clamping plate 41 is subjected to force and moves in the third axis Z direction, the other end of the side clamping plate 41 moves in the third axis Z direction, forming a lever structure to perform a clamping operation on the workpiece.

[0046] Furthermore, the side clamping plate 41 and the pressure plate 32 cooperate with each other to simultaneously clamp the opposite sides of the workpiece, thereby improving the clamping stability of the fixture.

[0047] Specifically, the working principle of the lever-type differential pressing and clamping fixture provided in this embodiment is as follows: In the initial state, the two pressure plates 32 of the one-press-two mechanism 3 are open relative to the workpiece positioning mechanism 2. First, the workpiece is placed on the workpiece square locator 21 of the two workpiece positioning mechanisms 2, so that the side wall of the workpiece is in contact with the positioning reference 211 on the workpiece square locator 21. Then, the lateral clamping block 212 is driven by the toe-clamping cylinder 22 to clamp the workpiece. Third, the side clamping plate 41 is driven by the linear actuator 2 43, and the two pressure plates 32 in the one-press-two mechanism 3 are driven to clamp the workpiece in the third axis Z direction, completing the workpiece pressing and clamping operation.

[0048] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lever-type differential pressing and clamping fixture, comprising a fixture body (1) and at least two workpiece positioning mechanisms (2) disposed on the fixture body (1), wherein a pressing mechanism (3) is provided on the fixture body (1) between two adjacent workpiece positioning mechanisms (2), characterized in that: The pressing mechanism (3) includes a linear actuator (31) and two pressing plates (32) facing opposite directions. The pressing plates (32) are connected to the linear actuator (31) or the fixture body (1) through a hinge structure. The telescopic drive shaft of the linear actuator (31) is connected to a pressing plate connector (33) that is movably hinged to the pressing plate (32) in the first axis (Y) direction. The pressing plate connector (33) is provided with a pressing rotation guide correction difference compensation component (34) that is movably contacting the lower side of the inner end of the pressing plate (32) so that the two pressing plates (32) are in different height pressing positions.

2. The lever-type differential pressing and clamping fixture according to claim 1, characterized in that, The pressing rotary guide differential compensation component (34) is cylindrical, and the inner ends of the two pressure plates (32) respectively have arc convex surfaces (321). The pressing rotary guide differential compensation component (34) and the arc convex surfaces (321) are in tangential contact. The pressure plate connector (33) is provided with a through hole (331) for the pressing rotary guide differential compensation component (34) to pass through. The inner diameter of the through hole (331) is larger than the outer diameter of the pressing rotary guide differential compensation component (34).

3. The lever-type differential pressing and clamping fixture according to claim 1, characterized in that, A pressure plate compensation adjustment structure is provided between the pressure plate connector (33) and the pressure plate (32). At least part of the pressure plate compensation adjustment structure is provided on the pressure plate connector (33), and the remaining part is provided on the pressure plate (32). The at least part and the remaining part of the pressure plate compensation adjustment structure are interlocked and either the at least part or the remaining part can be displaced relative to the other in the first axis (Y) direction.

4. The lever-type differential pressing and clamping fixture according to claim 3, characterized in that, The pressure plate differential adjustment structure includes a strip-shaped through hole (334) and a through shaft (332). Either the strip-shaped through hole (334) or the through shaft (332) is provided on the pressure plate connector (33), and the other is provided on the pressure plate (32). The pressing rotation guide differential adjustment component (34) and the through shaft (332) are arranged in an inverted triangle.

5. The lever-type differential pressing and clamping fixture according to claim 1, characterized in that, A support top frame (35) is also connected to the telescopic drive shaft of the linear actuator (31). The top of the support top frame (35) is located below the pressing rotation guide differential compensation member (34), and the support top frame (35) and the pressure plate connector (33) are linearly and movably connected in the direction of the second axis (X) perpendicular to the first axis (Y).

6. The lever-type differential pressing and clamping fixture according to claim 5, characterized in that, The pressure plate connector (33) is provided with several strip-shaped through holes (333), and the support top frame (35) is provided with a through shaft (351) that passes through the strip-shaped through holes (333). The through shaft (351) and the pressing rotation guide differential compensation component (34) are arranged in an equilateral triangle.

7. The lever-type differential pressing and clamping fixture according to claim 5, characterized in that, A recessed relief groove (352) is provided on the top of the support top frame (35), and at least a portion of the pressure plate connector (33) is located in the recessed relief groove (352).

8. The lever-type differential pressing and clamping fixture according to claim 1, characterized in that, The hinge structure includes a linkage support arm (36), the lower end of which is hinged to the linear actuator (31) or the fixture body (1), and the upper end of which is hinged to the corresponding pressure plate (32).

9. The lever-type differential pressing and clamping fixture according to claim 1, characterized in that, The workpiece positioning mechanism (2) includes a workpiece square locator (21), on which positioning references (211) are provided in multiple directions, and a lateral clamping block (212) is provided on the side of the workpiece square locator (21) away from the positioning references (211) in the circumferential direction, and the lateral clamping block (212) is connected to the toe clamping cylinder (22).

10. The lever-type differential pressing and clamping fixture according to claim 1, characterized in that, The workpiece positioning mechanism (2) also includes a side pressing plate (41) that is linearly distributed with the first pressing mechanism (3). The middle part of the side pressing plate (41) is hinged to the second linear actuator (43) through a hinge arm (42), and the telescopic shaft of the second linear actuator (43) is hinged to the outer end of the side pressing plate (41).

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