Lifting mechanism and positioning tool

Abstract

The utility model relates to a lifting mechanism and a positioning tool, and belongs to the technical field of tool clamps. A lifting mechanism comprises a mounting base, a first transmission part, a second transmission part, a movable part and a driving mechanism. The first transmission part is provided with a first end and a second end which are oppositely arranged, and the first end is hinged to the mounting base. The second transmission part is provided with a third end and a fourth end which are oppositely arranged, and the third end is hinged to the second end. The movable part is adjustably arranged on the mounting base in the first direction. The fourth end is hinged to the movable part, and the fourth end and the first end are arranged in the first direction. The first transmission part has a first position and a second position, and is configured as follows: an included angle is formed between the extension direction and the first direction when the first transmission part is in the first position, so that the fourth end is close to the first end; the extension direction is parallel to the first direction at the second position, so that the fourth end is far away from the first end. And a driving mechanism. The first driving part is configured to drive the first driving part to be switched between the first position and the second position.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling fixtures, and particularly relates to a lifting mechanism and a positioning tooling. Background Art

[0002] A tooling fixture is an industrial device used for clamping, positioning, supporting, and fixing workpieces for machining, assembly, or inspection. A tooling fixture usually consists of components such as a fixture body, a fixture base, positioning elements, clamping elements, and supporting elements, and its function is to ensure the accurate, stable, and reliable position of the workpiece during the machining process. Among them, one or several of the positioning elements, clamping elements, and supporting elements will press against the workpiece through a driving mechanism. When the power source (such as a gas source, a power source, etc.) of the driving mechanism fails, the clamping force of the above-mentioned elements on the workpiece will become weak, resulting in the failure of positioning, support, and fixation. Summary of the Utility Model

[0003] In view of the above problems, the embodiments of the present application provide a lifting mechanism and a positioning tooling, which can solve the above technical problems.

[0004] In a first aspect, the embodiments of the present application provide a lifting mechanism including a mounting seat, a first transmission member, a second transmission member, a movable member, and a driving mechanism. The first transmission member has a first end and a second end disposed opposite to each other, and the first end is hinged to the mounting seat. The second transmission member has a third end and a fourth end disposed opposite to each other, and the third end is hinged to the second end. The movable member is adjustably disposed on the mounting seat along a first direction. The fourth end is hinged to the movable member, and the fourth end and the first end are arranged along the first direction. The first transmission member has a first position and a second position, and the first transmission member is configured to: when in the first position, the extending direction forms an angle with the first direction so that the fourth end approaches the first end; when in the second position, the extending direction is parallel to the first direction so that the fourth end moves away from the first end. The driving mechanism is configured to drive the first transmission member to switch between the first position and the second position.

[0005] In the above solution, the first transmission member has a first end and a second end disposed opposite to each other, and the first end is hinged to the mounting seat. The second transmission member has a third end and a fourth end disposed opposite to each other, and the third end is hinged to the second end. The movable member is adjustably disposed on the mounting seat along a first direction. The fourth end is hinged to the movable member, and the fourth end and the first end are arranged along the first direction. When the first transmission member is in the second position, the extending direction of the first transmission member is parallel to the first direction so that the fourth end moves away from the first end.

[0006] Specifically, since the movable member is adjustably disposed on the mounting base in the first direction, when a positioning structure on the movable member (such as one or several of a positioning element, a clamping element, and a supporting element) bears an external force, the movable member will apply a first component force of the external force perpendicular to the first direction to the mounting base, and transmit a second component force of the external force parallel to the first direction to the second transmission member. Since when the first transmission member is in the second position, the extending direction of the first transmission member is parallel to the first direction, that is, the first end and the second end are arranged along the first direction. At the same time, since the fourth end and the first end are arranged along the first direction and the third end is hinged to the second end, that is, the fourth end and the third end are also arranged along the first direction. Furthermore, when bearing the second component force in the first direction, the second component force will not cause the second transmission member and the first transmission member to rotate relative to each other. That is, at this time, the first transmission member and the second transmission member are in a dead point position (the dead point position refers to a position or state where a mechanical device cannot continue to move). Thus, when the first transmission member is in the second position, even if the driving mechanism loses the power source, when bearing an external force, the first transmission member will not move from the second position to the first position. Furthermore, the positions of the fourth end and the movable member in the first direction remain unchanged. Furthermore, the positioning, supporting, and fixing of the positioning tooling with the lifting mechanism are still effective.

[0007] In some embodiments, the lifting mechanism further includes a first abutting member disposed on the mounting base. Along the second direction, the first abutting member and the driving mechanism are respectively located on opposite sides of the first transmission member. When the first transmission member is in the second position, along the second direction, the first abutting member abuts against the first transmission member, and the first direction, the second direction, and the rotation axis of the first transmission member are perpendicular to each other in pairs.

[0008] In the above solution, along the second direction, the first abutting member and the driving mechanism are respectively located on opposite sides of the first transmission member. When the first transmission member is in the second position, along the second direction, the first abutting member abuts against the first transmission member. Thus, the first abutting member can limit the rotation position of the first transmission member, and further reduce the risk of the first transmission member rotating past the second position.

[0009] In some embodiments, the driving mechanism includes a fixing member and a telescopic member. One end of the telescopic member is slidably inserted into the fixing member, the end of the fixing member away from the telescopic member is hinged to the mounting base, and the end of the telescopic member away from the fixing member is hinged to the third end.

[0010] In the above solution, the driving mechanism includes a fixing member and a telescopic member. One end of the telescopic member is slidably inserted into the fixing member, the end of the fixing member away from the telescopic member is hinged to the mounting base, and the end of the telescopic member away from the fixing member is hinged to the third end. Thus, when the telescopic member extends relative to the fixing member, it can drive the second end to rotate around the first end, and further make the first transmission member move towards the second position, with a simple structure and easy to implement.

[0011] In some embodiments, the first abutting member is adjustably disposed on the mounting base along the second direction.

[0012] In the above solution, the first abutting member is adjustably disposed on the mounting base along the second direction, so that it is convenient for the operator to adjust the position of the first abutting member along the second direction, so that when the first transmission member is in the second position, the first abutting member abuts against the first transmission member along the second direction.

[0013] In some embodiments, the mounting base includes a base body and a guiding member. The guiding member is disposed on the base body, and the movable member is slidably disposed on the guiding member. The guiding member is used to guide the movable member to move along the first direction.

[0014] In the above solution, the guiding member is disposed on the base body, and the movable member is slidably disposed on the guiding member. The guiding member is used to guide the movable member to move along the first direction, so that the fourth end hinged to the movable member can only move along the first direction. Thus, when the second end drives the third end to rotate around the first end, the third end will drive the fourth end to approach or move away from the first end along the first direction.

[0015] In some embodiments, the lifting mechanism further includes an oil supply assembly. The oil supply assembly is disposed on the movable member and is used to supply lubricating oil to the guiding member.

[0016] In the above solution, the oil supply assembly is disposed on the movable member and is used to supply lubricating oil to the guiding member to reduce the relative friction at the sliding connection between the guiding member and the movable member, and extend the service life of the mechanism.

[0017] In some embodiments, the movable member includes a sliding body and an adjusting assembly. The sliding body is adjustably disposed on the mounting base along the first direction. The fourth end is hinged to the sliding body. The adjusting assembly is disposed on the sliding body and is configured to abut against the mounting base along the first direction when the first transmission member is in the first position.

[0018] In the above solution, by the adjusting assembly abutting against the mounting base along the first direction when the first transmission member is in the first position, the distance between the sliding body and the mounting base along the first direction when the first transmission member is in the first position is limited.

[0019] In some embodiments, the adjusting assembly includes a lead screw. The sliding body has a threaded hole for the lead screw to pass through and threadedly cooperate with the lead screw. The lead screw is rotatably disposed in the threaded hole and extends along the first direction.

[0020] In the above solution, the distance that the lead screw protrudes from the sliding body is adjusted by the cooperation of the lead screw and the threaded hole, so as to adjust the distance between the sliding body and the mounting base along the first direction when the first transmission member is in the first position. The structure is simple and easy to implement.

[0021] Second aspect, an embodiment of the present application provides a positioning tooling, which includes a positioning member and the lifting mechanism in any one of the above embodiments. The positioning member is arranged on the side of the movable member away from the first transmission member along the first direction, and the positioning member is used for positioning a workpiece.

[0022] In some embodiments, the positioning tooling further includes a protective cover, which is sleeved outside the lifting mechanism, and a through hole for the movable member to pass through along the first direction is provided on the protective cover.

[0023] In the above solution, the positioning tooling further includes a protective cover, which can reduce the risk of foreign objects interfering with the movement of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 Structural schematic diagram of the lifting mechanism provided by the embodiment of the present invention when it is in the second position;

[0026] Figure 2 For Figure 1 Partial enlarged view of part A in

[0027] Figure 3 Structural schematic diagram of the mounting seat provided by the embodiment of the present invention;

[0028] Figure 4 Cross-sectional view of the lifting mechanism provided by the embodiment of the present invention;

[0029] Figure 5 Structural schematic diagram of the positioning tooling provided by the embodiment of the present invention.

[0030] In the figure:

[0031] 1000 - positioning tooling;

[0032] 100 - lifting mechanism;

[0033] 10 - mounting seat; 11 - base body; 111 - first mounting member; 112 - second mounting member; 113 - reinforcing rib; 114 - second abutting member; 12 - guiding member;

[0034] 20 - first transmission member; 21 - first end; 22 - second end;

[0035] 30 - second transmission member; 31 - third end; 32 - fourth end;

[0036] 40 - Moving part; 41 - Sliding body; 42 - Adjusting component; 421 - Lead screw;

[0037] 50 - Driving mechanism; 51 - Fixed part; 52 - Telescopic part;

[0038] 60 - Oil supply component;

[0039] 70 - First abutting part; 71 - First gasket;

[0040] 200 - Protective cover; 210 - Through hole;

[0041] X - First direction; Y - Second direction; Z - Third direction. Detailed implementation mode

[0042] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0043] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0044] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0045] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0046] A tooling fixture is an industrial device used for clamping, positioning, supporting, and fixing workpieces for machining, assembly, or inspection. Tooling fixtures typically consist of components such as a fixture body, a fixture base, positioning elements, clamping elements, and supporting elements. Its function is to ensure the accurate, stable, and reliable position of the workpiece during the machining process. Among them, one or several of the positioning elements, clamping elements, and supporting elements will be pressed against the workpiece through a driving mechanism. When the power source (such as air source, power supply, etc.) of the driving mechanism fails, the clamping force of the above elements on the workpiece will become weaker, resulting in the failure of positioning, support, and fixation.

[0047] To solve the above technical problems, referring to Figures 1 - 5 , this embodiment provides a lifting mechanism 100, which includes a mounting seat 10, a first transmission member 20, a second transmission member 30, a movable member 40, and a driving mechanism 50. The first transmission member 20 has a first end 21 and a second end 22 arranged oppositely, and the first end 21 is hinged to the mounting seat 10. The second transmission member 30 has a third end 31 and a fourth end 32 arranged oppositely, and the third end 31 is hinged to the second end 22. The movable member 40 is adjustably arranged on the mounting seat 10 along the first direction X. The fourth end 32 is hinged to the movable member 40, and the fourth end 32 and the first end 21 are arranged along the first direction X. The first transmission member 20 has a first position and a second position. The first transmission member 20 is configured to: when in the first position, the extending direction forms an angle with the first direction X, so that the fourth end 32 approaches the first end 21; when in the second position, the extending direction is parallel to the first direction X, so that the fourth end 32 is away from the first end 21. The driving mechanism 50 is configured to drive the first transmission member 20 to switch between the first position and the second position.

[0048] The mounting seat 10 is a component in the lifting mechanism 100 for mounting other components. The mounting seat 10 can be connected to the reference plate in the positioning tooling 1000 to have better reference positioning. The mounting seat 10 can also include a base plate so that the components mounted on the mounting seat 10 have better reference positioning.

[0049] The first transmission member 20 and the second transmission member 30 are mechanisms driven by the driving mechanism 50. Exemplarily, the first transmission member 20 and the second transmission member 30 can both be rod-shaped structures or strip-shaped structures.

[0050] The first end 21 and the second end 22 are two ends of the first transmission member 20 arranged oppositely in its extending direction; the third end 31 and the fourth end 32 are two ends of the second transmission member 30 arranged oppositely in its extending direction.

[0051] The driving mechanism 50 is a mechanism for driving the first transmission member 20 and the second transmission member 30 to move. Exemplarily, the driving mechanism 50 can be a driving component such as a cylinder, a hydraulic cylinder, or an electric telescopic rod.

[0052] For the convenience of describing the present application, a first direction X, a second direction Y, and a third direction Z are introduced. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. Exemplarily, the first direction X may be the vertical direction, and the third direction Z and the second direction Y may be the horizontal directions.

[0053] Specifically, referring to Figure 1 , since the movable member 40 is adjustably disposed on the mounting base 10 along the first direction X, when a positioning structure (such as one or several of a positioning element, a clamping element, and a supporting element) on the movable member 40 bears an external force F, the movable member 40 will apply a first component force F1 of the external force perpendicular to the first direction X to the mounting base 10, and transmit a second component force F2 of the external force parallel to the first direction X to the second transmission member 30. Since when the first transmission member 20 is in the second position, the extending direction of the first transmission member 20 is parallel to the first direction X, that is, the first end 21 and the second end 22 are arranged along the first direction X. At the same time, since the fourth end 32 and the first end 21 are arranged along the first direction X and the third end 31 is hinged to the second end 22, that is, the fourth end 32 and the third end 31 are also arranged along the first direction X. Furthermore, when bearing the second component force F2 along the first direction X, the second component force F2 will not cause the second transmission member 30 and the first transmission member 20 to rotate relative to each other. That is, at this time, the first transmission member 20 and the second transmission member 30 are in a dead point position (the dead point position means that the mechanical device cannot continue to move in certain specific positions or states).

[0054] In the solution of this embodiment, since the first transmission member 20 and the second transmission member 30 are in the dead point position when in the second position, when the first transmission member 20 is in the second position, even if the driving mechanism 50 loses the power source, when bearing an external force, the first transmission member 20 will not move from the second position to the first position. Furthermore, the positions of the fourth end 32 and the movable member 40 in the first direction X remain unchanged. Furthermore, the positioning, supporting, and fixing of the positioning tooling 1000 having the lifting mechanism 100 are still effective.

[0055] In some embodiments of the present application, referring to Figure 2 , the lifting mechanism 100 further includes a first abutting member 70, and the first abutting member 70 is disposed on the mounting base 10. Along the second direction Y, the first abutting member 70 and the driving mechanism 50 are respectively located on opposite sides of the first transmission member 20. When the first transmission member 20 is in the second position, along the second direction Y, the first abutting member 70 abuts against the first transmission member 20, and the first direction X, the second direction Y, and the rotation axis of the first transmission member 20 are perpendicular to each other in pairs.

[0056] The abutting member is a member for abutting against the first transmission member 20 to make the first transmission member 20 in the second position.

[0057] Specifically, since the second position requires both the first transmission member 20 and the second transmission member 30 to extend along the first direction X, in an embodiment where only the driving mechanism 50 drives the first driving member to the second position, the driving mechanism 50 is required to have a high stroke accuracy.

[0058] As mentioned in this embodiment, by abutting the first abutting member 70 against the first transmission member 20 to limit the driving mechanism 50 from driving the first transmission member 20 to move, so that the first transmission member 20 can be more accurately located at the second position. This is beneficial to reducing the accuracy requirements for the driving mechanism 50 and reducing the cost of the driving mechanism 50.

[0059] In the solution of this embodiment, along the second direction Y, the first abutting member 70 and the driving mechanism 50 are respectively located on opposite sides of the first transmission member 20. When the first transmission member 20 is located at the second position, along the second direction Y, the first abutting member 70 abuts against the first transmission member 20. Thus, the first abutting member 70 can limit the rotational position of the first transmission member 20, thereby reducing the risk of the first transmission member 20 rotating past the second position.

[0060] In some embodiments of the present application, referring to Figure 1 , the driving mechanism 50 includes a fixing member 51 and a telescopic member 52. One end of the telescopic member 52 is slidably inserted into the fixing member 51. The end of the fixing member 51 away from the telescopic member 52 is hinged to the mounting seat 10, and the end of the telescopic member 52 away from the fixing member 51 is hinged to the third end 31.

[0061] In the solution of this embodiment, the driving mechanism 50 includes a fixing member 51 and a telescopic member 52. One end of the telescopic member 52 is slidably inserted into the fixing member 51. The end of the fixing member 51 away from the telescopic member 52 is hinged to the mounting seat 10, and the end of the telescopic member 52 away from the fixing member 51 is hinged to the third end 31. Thus, when the telescopic member 52 extends relative to the fixing member 51, it can drive the second end 22 to rotate around the first end 21, and further make the first transmission member 20 move towards the second position, with a simple structure and easy to implement.

[0062] In some embodiments of the present application, referring to Figure 2 , the first abutting member 70 is adjustably arranged on the mounting seat 10 along the second direction Y.

[0063] In some embodiments, the lifting mechanism 100 further includes a first gasket 71. Along the second direction Y, the first gasket 71 is clamped between the mounting seat 10 and the first abutting member 70. Along the second direction Y, the first gasket 71 can be added or reduced between the first abutting member 70 and the mounting seat 10, so that the first abutting member 70 is adjustably arranged on the mounting seat 10 along the second direction Y.

[0064] In the solution of this embodiment, the first abutting member 70 is adjustably arranged on the mounting base 10 along the second direction Y, so that it is convenient for the operator to adjust the position of the first abutting member 70 along the second direction Y, so that when the first transmission member 20 is in the second position, the first abutting member 70 abuts against the first transmission member 20 along the second direction Y.

[0065] In some embodiments of the present application, referring to Figure 1 , the mounting base 10 includes a base body 11 and a guiding member 12. The guiding member 12 is arranged on the base body 11, and the moving member 40 is slidably arranged on the guiding member 12. The guiding member 12 is used to guide the moving member 40 to move along the first direction X.

[0066] In some embodiments, the base includes a first mounting member 111 extending along the second direction Y and a second mounting member 112 arranged at the edge of the first mounting member 111 in the third direction Z. The second mounting member 112 extends along the first direction X. A reinforcing rib 113 is arranged between the first mounting member 111 and the second mounting bracket. The guiding member 12 is arranged on the second mounting member 112 and extends along the first direction X.

[0067] The guiding member 12 can be one or a combination of a guiding rod and a guiding rail.

[0068] In the embodiment where the guiding member 12 is a guiding rail, the moving member 40 is provided with a slider corresponding to the guiding rail.

[0069] In the solution of this embodiment, the guiding member 12 is arranged on the base body 11, and the moving member 40 is slidably arranged on the guiding member 12. The guiding member 12 is used to guide the moving member 40 to move along the first direction X, so that the fourth end 32 hinged to the moving member 40 can only move along the first direction X. Thus, when the second end 22 drives the third end 31 to rotate around the first end 21, the third end 31 will drive the fourth end 32 to approach or move away from the first end 21 along the first direction X.

[0070] In some embodiments of the present application, the lifting mechanism 100 further includes an oil supply assembly 60. The oil supply assembly 60 is arranged on the moving member 40 and is used to supply lubricating oil to the guiding member 12.

[0071] The oil supply assembly 60 can be a component formed by a combination of a lubricating oil storage component (such as an oil tank) and a liquid pumping device (such as an oil pump).

[0072] In the solution of this embodiment, the oil supply assembly 60 is arranged on the moving member 40 and is used to supply lubricating oil to the guiding member 12 to reduce the relative friction at the sliding connection between the guiding member 12 and the moving member 40 and extend the service life of the mechanism.

[0073] In some embodiments of the present application, referring to Figure 4, the movable member 40 includes a sliding body 41 and an adjusting assembly 42. The sliding body 41 is adjustably disposed on the mounting base 10 along the first direction X. The fourth end 32 is hinged to the sliding body 41. The adjusting assembly 42 is disposed on the sliding body 41 and is configured to abut against the mounting base 10 along the first direction X when the first transmission member 20 is in the first position.

[0074] In some embodiments, a second abutting member 114 for abutting against the adjusting assembly 42 is provided on the base. The lifting mechanism 100 further includes a second gasket (not shown in the figure). Along the first direction X, the second gasket (not shown in the figure) is clamped between the mounting base 10 and the second abutting member 114. Along the first direction X, the second gasket (not shown in the figure) can be added or reduced between the second abutting member 114 and the mounting base 10 so that the second abutting member 114 is adjustably disposed on the mounting base 10 along the first direction X.

[0075] In the solution of this embodiment, when the first transmission member 20 is in the first position, the adjusting assembly 42 abuts against the mounting base 10 along the first direction X, thereby defining the distance between the sliding body 41 and the mounting base 10 along the first direction X when the first transmission member 20 is in the first position.

[0076] In some embodiments of the present application, the adjusting assembly 42 includes a lead screw 421. The sliding body 41 has a threaded hole through which the lead screw 421 passes and is threadedly engaged with the lead screw 421. The lead screw 421 is rotatably disposed in the threaded hole and extends along the first direction X.

[0077] In some embodiments, a scale corresponding to the movement range of the movable member 40 (not shown in the figure) is provided on the mounting base 10. The scale is used to facilitate measuring the distance between the sliding body 41 and the mounting base 10 along the first direction X when the first transmission member 20 is in the first position.

[0078] In some embodiments, the end of the lead screw 421 has a hexagonal hole to facilitate the operator to rotate the lead screw 421 with a hexagonal wrench.

[0079] In the solution of this embodiment, the distance that the lead screw 421 protrudes from the sliding body 41 is adjusted by the cooperation of the lead screw 421 and the threaded hole, thereby adjusting the distance between the sliding body 41 and the mounting base 10 along the first direction X when the first transmission member 20 is in the first position, and further adjusting the stroke of the movable member 40. The structure is simple and easy to implement.

[0080] On the other hand, an embodiment of the present application provides a positioning tooling 1000 including a positioning member and the lifting mechanism 100 in any one of the above embodiments. The positioning member is disposed on the side surface of the movable member 40 away from the first transmission member 20 along the first direction X, and the positioning member is used to position the workpiece.

[0081] It should be noted that the above workpiece can be an automotive part.

[0082] In some embodiments of the present application, the positioning tooling 1000 further includes a protective cover 200 sleeved outside the lifting mechanism 100. A through hole 210 for the moving member 40 to pass through in the first direction X is formed in the protective cover 200.

[0083] The above-mentioned protective cover 200 can be a heat-resistant canvas cover to reduce the weight of the positioning tooling 1000.

[0084] In the solution of this embodiment, the positioning tooling 1000 further includes a protective cover 200, which can reduce the risk of foreign debris interfering with the movement of the tooling.

[0085] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0086] The above embodiments are only used to illustrate the technical solutions of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lifting mechanism, characterized in that: include: Mounting seat; A first transmission member having a first end and a second end arranged opposite to each other, wherein the first end is hinged to the mounting seat; A second transmission member has a third end and a fourth end that are oppositely disposed, and the third end is hinged to the second end; A movable member is adjustably arranged on the mounting seat along a first direction, the fourth end is hinged to the movable member, the fourth end and the first end are arranged along the first direction, the first transmission member has a first position and a second position, and the first transmission member is configured as follows: when in the first position, the extension direction forms an angle with the first direction so that the fourth end is close to the first end; when in the second position, the extension direction is parallel to the first direction so that the fourth end is away from the first end; The driving mechanism is configured to drive the first transmission member to switch between a first position and a second position.

2. The lifting mechanism according to claim 1, characterized in that: The lifting mechanism further includes a first abutment member, which is disposed on the mounting seat; Along the second direction, the first abutment member and the driving mechanism are respectively located on opposite sides of the first transmission member. When the first transmission member is located at the second position, along the second direction, the first abutment member abuts against the first transmission member, and the first direction, the second direction and the rotation axis of the first transmission member are perpendicular to each other.

3. The lifting mechanism according to claim 2, characterized in that: The driving mechanism includes a fixed part and a telescopic part, one end of the telescopic part can be slidably inserted in the fixed part, one end of the fixed part away from the telescopic part is hinged to the mounting seat, and one end of the telescopic part away from the fixed part is hinged to the third end.

4. The lifting mechanism according to claim 2, characterized in that: The first abutment member is adjustably disposed on the mounting seat along the second direction.

5. The lifting mechanism according to claim 1, characterized in that: The mounting seat comprises a base and a guide member, wherein the guide member is arranged on the base, the movable member is slidably arranged on the guide member, and the guide member is used to guide the movable member to move along the first direction.

6. The lifting mechanism according to claim 5, characterized in that: The lifting mechanism further comprises an oil supply assembly, which is arranged on the movable member and is used to provide lubricating oil to the guide member.

7. The lifting mechanism according to claim 1, characterized in that: The movable parts include: a sliding body, the sliding body being adjustably arranged on the mounting seat along the first direction, and the fourth end being hinged to the sliding body; An adjusting component is disposed on the sliding body, and the adjusting component is configured to abut against the mounting seat along a first direction when the first transmission member is located at the first position.

8. The lifting mechanism according to claim 7, characterized in that: The adjusting assembly includes a screw rod, and the sliding body has a threaded hole for the screw rod to pass through and is threadably matched with the screw rod. The screw rod is rotatably disposed in the threaded hole and extends along the first direction.

9. A positioning tool, characterized in that: It comprises a positioning member and a lifting mechanism as described in any one of claims 1 to 8, wherein the positioning member is arranged on a side of the movable member away from the first transmission member along the first direction, and the positioning member is used to position a workpiece.

10. A positioning tool according to claim 9, characterized in that: The positioning tool also includes a protective cover, which is sleeved outside the lifting mechanism. The protective cover is provided with a through hole for the movable part to pass through along the first direction.

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