Lifting tool

Abstract

The utility model relates to a lifting tool, which is used for a lifting tool in motor vehicle manufacturing, and is characterized in that the lifting tool comprises a supporting structure comprising a first supporting component and a second supporting component which are opposite to each other; the driver is arranged on the first supporting component and used for providing rotating power; the lead screw and nut mechanism comprises a rotatable lead screw and a nut assembly capable of moving horizontally along the lead screw, the lead screw is in transmission connection with the driver through the power transmission mechanism, and at least one of the lead screw and the nut assembly is supported on the second supporting component; the lead screw extends obliquely upwards from the first end facing the first supporting component to the second end facing the second supporting component, and the nut assembly directly or indirectly carries a tool to be lifted. The tool is simple in design and easy and convenient to operate. The production efficiency can be improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to a lifting tool, particularly for use in the automotive industry, for assisting single-person operation of heavy-duty tooling such as drilling tools in confined spaces. Background Technology

[0002] In the automotive industry, vehicles exported to right-hand drive countries require drilling holes on the left side of the vehicle body. Due to space constraints, the drilling operation can only be performed by a single person. The operator must use their left hand to lift the drilling fixture to the installation height while using their right hand to rotate the connecting locating nut. Since the drilling fixture weighs over 20kg, a single person cannot complete the lifting and positioning work with one hand. Furthermore, the vehicle body parts to which the drilling fixture is applied are at an angle relative to the horizontal, further increasing the difficulty of operation. Under these conditions, a workshop hoisting auxiliary robotic arm is needed. However, this auxiliary robotic arm requires large dynamic and static loads, high positioning accuracy, poor flexibility, large space requirements, and high costs. Utility Model Content

[0003] In view of the above problems, this application aims to design a simple-to-operate lifting tool. This lifting tool allows heavy tooling to be lifted at an angle relative to the horizontal direction to the required installation height. This effectively reduces the labor intensity of operators, saves on the cost of installation auxiliary robotic arms, frees up production space, and meets the needs of automobile production.

[0004] Therefore, this application proposes a lifting tool for lifting fixtures, particularly drilling fixtures, in motor vehicle manufacturing. The lifting tool comprises: a support structure including a first support member and a second support member opposite to each other; a driver, disposed on the first support member, for providing rotational power; and a screw-nut mechanism including a rotatable screw and a nut assembly capable of translating along the screw. The screw is connected to the driver via a power transmission mechanism. At least one of the screw and the nut assembly is supported on the second support member. The screw extends obliquely upward from a first end toward the first support member to a second end toward the second support member. The nut assembly directly or indirectly supports the fixture to be lifted. This lifting tool effectively reduces the force required to lift the fixture and alleviates the labor of the operator.

[0005] Advantageously, the support structure can be in the form of a frame, having: opposing first and second side plates; and a third side plate, in the form of a vertical plate, connecting the first and second side plates, constituting the first support member. The second support member can be in the form of a beam plate, with the upper part of the beam plate on the opposite side of the vertical plate connecting the first and second side plates, arranged such that one of its planar portions slopes downward toward the vertical plate to support the screw and nut mechanism.

[0006] Advantageously, the nut assembly includes: a screw nut sleeved on a screw, a sliding member that carries the tooling to be lifted, and a connecting member that connects the screw nut and the sliding member.

[0007] Advantageously, the sliding element of the nut assembly is in the shape of a linear guide rail, arranged parallel and spaced apart on one side of the lead screw, and can be translatably mounted on the beam plate via a slide block so as to move obliquely and linearly with the lead screw and nut when the lead screw rotates.

[0008] Advantageously, the power transmission mechanism includes a pulley mechanism, which comprises: a large pulley rotatably connected to the output shaft of the drive; a small pulley rotatably connected to the lead screw via a universal joint; and a belt connecting the large pulley and the small pulley for transmitting rotational power.

[0009] Advantageously, the lead screw is a ball screw type, with one end connected to a small pulley via a universal joint, and the other end supported on the beam plate via a ball bearing seat.

[0010] Advantageously, the lifting tool also includes a locking mechanism comprising: a circular locking disc integrally formed with the large pulley and having a plurality of holes distributed along its circumference; and a locking pin detachably mounted on the upright plate for inserting into the corresponding hole of the locking disc when the linear guide-shaped slider is moved into position to lock the rotation of the large pulley.

[0011] Advantageously, the frame also includes a mounting plate for the lead screw, which is positioned between the first and second side plates of the frame, with the lead screw nut and universal joint located on opposite sides of the mounting plate.

[0012] Advantageously, the tray is positioned on top of the linear guide-shaped slider to support the tooling to be lifted.

[0013] Advantageously, the frame also includes: four support legs disposed at the lower part of the frame; a positioning component comprising: four positioning feet, each fitted onto one of the four support legs, having different shapes to adapt to different tooling usage environments for supporting the lifting tool; and at least two positioning pins disposed on the frame support legs for insertion into corresponding positioning holes in the tooling usage environment to position the lifting tool. Thus, on the one hand, the tool's positioning function allows for initial positioning without additional adjustments after the tooling is lifted into place. On the other hand, using multiple such shared positioning structures can satisfy the positioning requirements of at least two different vehicle body structures, meaning one tool can be used for multiple vehicle body structures.

[0014] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Additionally, the various features in the drawings discussed below are not necessarily drawn to scale. The dimensions of the various features and elements in the drawings may be enlarged or reduced to more clearly illustrate the embodiments of this application. In the drawings:

[0016] Figure 1 An overall perspective view of a lifting tool according to an embodiment of this application is shown.

[0017] Figure 2-4 Represented from different angles Figure 1 The lifting equipment had its frame section removed to allow for a clearer view of its internal structure from different perspectives.

[0018] Figure 5 for Figure 2 A magnified view of a detail in the middle section.

[0019] Figure 6 Show Figure 1 A top view of the lifting tool.

[0020] Figure 7-8 The images show the same lifting tool installed in two different right-hand drive vehicle models.

[0021] Figure 9 The diagram illustrates the use of a lifting tool to raise the tool to a high position on the ground within the vehicle body, and the situation where the tool is in a low position.

[0022] Figure 10 A side view of a lifting tool according to an embodiment of this application is shown. Detailed Implementation

[0023] In this specification, for illustrative purposes only, various systems, structures, and devices are schematically depicted in the accompanying drawings, but not all features of the actual systems, structures, and devices are described. For example, well-known functions or structures are not described in detail to avoid unnecessary detail that could obscure this application. It should be understood that in any practical application, many specific implementation decisions need to be made to achieve the specific goals of the developer or user, and to comply with system-related and industry-related limitations, which may vary depending on the specific application. Furthermore, it should be understood that while such implementation decisions are complex and time-consuming, they are routine tasks for those skilled in the art who benefit from this application.

[0024] The terms and phrases used herein should be understood and interpreted in accordance with the understanding of those skilled in the art. The consistent use of terms or phrases herein is not intended to imply a specific definition, i.e., a definition different from the common and conventional meaning understood by those skilled in the art. For terms or phrases intended to have a specific meaning, i.e., a meaning different from that understood by those skilled in the art, such specific definition will be explicitly listed in the specification, giving the specific definition of the term or phrase directly and unambiguously.

[0025] Unless otherwise required by the content, throughout the following description and claims, the word “comprising” and its variations, such as “including”, shall be interpreted in an open-ended, inclusive sense, that is, as “including but not limited to”.

[0026] Throughout this specification, references to terms such as "an embodiment," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Therefore, the phrases "in one embodiment" or "in one embodiment" appearing in different places throughout this specification do not necessarily refer to the same embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] As used in this specification and the appended claims, unless expressly specified and limited otherwise, the indefinite article “a” in the singular form and the definite article “the” include one or more referents. It should also be noted that, unless expressly specified and limited otherwise, the term “or” generally includes “and / or” in meaning. For the purposes of this illustration, phrases in the form “A or B” mean “(A), (B) or (A and B)”. For the purposes of this illustration, phrases in the form “at least one of A, B, or C” mean “(A), (B), (C), (A and B), (A and C), (B and C) or (A, B, and C)”. Additionally, the character “ / ” in this document generally indicates that the preceding and following objects are in an “or” relationship.

[0028] In the description of the embodiments of this application, the terms "first", "second", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0029] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0030] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 the embodiments of 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 the embodiments of this application.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] Specific embodiments of this application will now be explained in detail with reference to the accompanying drawings.

[0033] First refer to Figure 1-4 The image shows a tooling for angular lifting according to this application, such as the aforementioned drilling tooling A (in...). Figure 7-9 Lifting tool 1 (shown in the image).

[0034] The lifting tool 1 includes: a support structure including a first support member and a second support member opposite to each other; a drive, disposed on the first support member, for providing rotational power; and a screw and nut mechanism including a rotatable screw and a nut assembly capable of translating along the screw. The screw is connected to the drive via a power transmission mechanism. At least one of the screw and the nut assembly is supported on the second support member. The screw extends obliquely upward from a first end toward the first support member to a second end toward the second support member. The nut assembly directly or indirectly carries the tooling to be lifted.

[0035] The nut assembly advantageously includes a screw nut 72 sleeved on the screw 7, a sliding member 8 that carries the tooling A to be lifted, and a connecting member that connects the screw nut 72 and the sliding member 8.

[0036] The following will provide further details in conjunction with the relevant accompanying drawings.

[0037] By way of example, the support structure may be, for example, a frame 2, which includes opposing upright plates 3 and a beam plate 4 opposite to the upright plates 3. An actuator is mounted on one side of the upright plates 3. A power transmission mechanism may be, for example, a pulley mechanism 6, located on the other side of the upright plates 3, rotatably connected to the actuator, such as a handwheel 5, and a lead screw 7, to transmit the rotational power of the actuator to the lead screw. The lead screw 7 extends upward at a given angle from its connection with the pulley mechanism 6, for example, to the beam plate 4. Advantageously, the sliding member 8 may be in the form of a linear guide rail. It can carry the tooling A to be lifted. Preferably, the sliding member may be arranged parallel and spaced apart on one side of the lead screw 7, translatably mounted on the beam plate 4, and threadedly connected to the lead screw 7 by a lead screw nut 72, so as to move linearly in the inclined direction when the lead screw rotates.

[0038] If it is a side view Figure 10 As clearly shown, the lifting tool according to this application is therefore designed with a lead screw, or sliding member, tilted at a certain angle relative to the horizontal direction, i.e., the vehicle floor, so that the tool A, lifted into position with the guide rail, perfectly matches the cutting surface of the body part to be drilled. This angle is generally between 30 and 45 degrees. In other words, the angle at which the sliding member tilts up and down is consistent with the angle of the cutting surface, thereby ensuring a perfect fit between the tooling and the vehicle body.

[0039] The use of lead screws here is due to their low cost and high efficiency. Furthermore, they have a long lifespan and extremely low maintenance costs.

[0040] The actuator can be a handwheel 5 as shown in the figure, which can be manually driven via its handle 51. Alternatively, the actuator can also be in the form of a motor for easier operation.

[0041] The following will provide a more detailed explanation in conjunction with the relevant accompanying drawings.

[0042] As shown in the figure, the supporting structure is advantageously in the form of frame 2, particularly a parallelepiped frame. Frame 2 can be made of high-density engineering plastics and magnesium-aluminum alloys, ensuring sufficient strength while being lightweight.

[0043] Advantageously, the frame 2 has opposing first side plates 9 and second side plates 10, as well as a third side plate, namely the aforementioned upright plate 3, which connects the first side plates 9 and second side plates 10. Furthermore, as can be seen from the figure, these side plates are all perforated to further reduce weight.

[0044] like Figure 1 and 6 As shown, frame 2 is open in the upper, lower, and opposite sides of the vertical slabs. Beam slab 4 connects to the first side slab 9 and the second side slab 10 at the upper part opposite the third side slab. Beam slab 4 is, for example, flat, as... Figure 1As shown, it is arranged at a certain angle relative to the horizontal direction, so that one of its flat parts is inclined downward toward the vertical plate 3, for supporting the lead screw 7 and the sliding member 8, which is preferably in the form of a linear guide rail.

[0045] When appropriate, the lead screw 7 and the sliding member 8 can be directly arranged on this planar portion. Advantageously, such as Figure 1-2 As shown, a wider plate 11 is provided on the inclined plane portion of the beam plate 4 to facilitate the arrangement of the lead screw 7 and the sliding member 8, so as to support the lead screw and the sliding member in parallel.

[0046] For this purpose, a bearing housing 71 for the lead screw 7, advantageously a ball bearing housing, and a slide 81 for the sliding member 8 are provided on the plate 11, for example see Figure 1-2 And 6.

[0047] Alternatively, provided that the aforementioned main functions can be achieved, one of the sliding elements 8 of the lead screw 7 and the nut assembly can be arranged on the plate 11. Other arrangements of the sliding elements 8 relative to the lead screw 7 are also possible.

[0048] In addition, as shown in the figure, frame 2 has four legs, which are located at the bottom of the frame and are used to support the frame and thus the tool.

[0049] Frame 2 also includes positioning components for positioning the entire lifting tool 1 in the tooling environment, such as the interior floor of a vehicle. Specifically, the positioning components include four positioning feet 21, 22, 23, and 24, which are respectively fitted onto the four outriggers. See also Figure 1-4 The four positioning feet 21, 22, 23 and 24 are advantageously different in shape to adapt to different tooling usage environments, such as vehicle interior floors, so as to allow the lifting tool 1 to be securely supported on the interior floor structure of different vehicle models, such as the gasoline-powered X5 and the electric X5.

[0050] In addition, see especially Figure 4 and 6 The positioning component also includes at least two positioning pins 25 and 26. These positioning pins are located on the frame legs near the positioning feet and are used to insert into corresponding positioning holes in the tooling's operating environment, such as the vehicle floor. This, combined with the aforementioned positioning feet, allows for accurate positioning of the lifting tool and thus accurately positioning the drilling tool A relative to the cut body parts. One positioning pin 25 is arranged forward-facing relative to the vehicle's front direction, while the other positioning pin 26 is arranged rearward-facing (see, for example, [reference needed]). Figure 9 ).

[0051] Figure 7 and 8 The images show the same lifting tool 1 being smoothly and accurately positioned inside two different right-hand drive vehicle models, with one of the locating pins 26 inserted into a corresponding locating hole in the vehicle floor. Meanwhile... Figure 9 You can see two positioning pins 25 and 26 that are inserted into the corresponding positioning holes in the vehicle floor.

[0052] For these different vehicle models, the positions and dimensions of the two corresponding positioning holes are standard, generally located on the inside of the vehicle. Therefore, these two positioning pins are correspondingly positioned on the two outriggers of the frame on the inside of the vehicle when the tool is in place.

[0053] However, these settings are not restrictive and can be adjusted according to the actual situation.

[0054] Furthermore, it is advantageous that, without affecting the oblique arrangement and movement of the lead screw 7 and the preferred linear guide-shaped slider 8, some support rods can be provided to strengthen the frame structure. For example... Figure 1-6 The lower support rod 27 and upper support rod 28 are shown. The lower support rod 27 is arranged between the two forward-facing (relative to the front of the vehicle) outriggers of the frame, and the upper support rod 28 is arranged, for example, in the middle of the upper opening between the first and second side plates of the frame. The upper support rod 28 can also be used as a handle for moving the lifting tool 1.

[0055] The power transmission mechanism is described below.

[0056] The power transmission mechanism preferably includes a pulley mechanism 6. Especially as... Figure 2 and 5 As shown, the pulley mechanism 6 includes: a large pulley 61, rotatably connected to the output shaft of the driver (here, the handwheel 5), serving as the drive pulley; a small pulley 62, rotatably connected to the lead screw 7 via a universal joint 64, serving as the driven pulley; and a belt 63, connecting the large pulley 61 and the small pulley 63, for transmitting rotational power from the driver. Preferably, the large pulley, small pulley, and belt of the pulley mechanism 6 are all toothed.

[0057] As shown in the figure, the drive mechanism, such as the handwheel 5, is mounted on the upright plate 3 on the outside of the frame, and the pulley mechanism 6 is mounted on the upright plate 3 on the inside of the frame.

[0058] Therefore, the output shaft of the drive extends into the frame through a through hole provided in the vertical plate 3 to be rotatably connected to the large pulley 61. The through hole is located approximately in the upper middle part of the vertical plate 3, as shown in the figure. The small pulley 62 is arranged in the frame at the lower outer part of the vertical plate 3 (relative to the tool's position inside the vehicle), and is rotatably connected to one end of the lead screw 7 via a universal joint 64. The lead screw 7 then extends upward at a given angle from the universal joint 64 into the frame to a bearing seat 71 provided on the plate 11, and is rotatably supported by the bearing seat.

[0059] Especially Figure 2 and 5 As shown, the large pulley 61 and the small pulley 62 are therefore offset in the height direction of the frame, i.e., the upright plate 3.

[0060] This arrangement of the drive and pulley mechanism saves space, facilitates the miniaturization of tool 1, and is beneficial for use in confined spaces.

[0061] Alternatively, other transmission mechanisms besides pulley mechanisms, such as gear transmission mechanisms or worm gear transmission mechanisms, can be considered.

[0062] Returning to the screw and nut mechanism, advantageously, the screw 7 here is of the ball screw type, thus having a reverser (not visible) within the screw and nut. As previously mentioned, one end of the screw is connected to the small pulley 62 via the aforementioned universal joint 64, and the other end is supported on the beam plate 4 via bearing housing 71, more specifically on the wider plate 11 on the beam plate.

[0063] The sliding member 8 is translatably supported on the beam plate 4, and more specifically on the wider plate 11 on the beam plate 4, via the aforementioned sliding block 81.

[0064] Advantageously, such as Figure 1-4 As shown, a tray 83 is provided to facilitate the carrying of the tool to be lifted. The tray 83 is set on the top of the sliding member 8 at the end of the sliding member 8 (near the front of the vehicle, i.e., near the body part to be drilled during operation) to carry the tool A to be lifted, so that it can move horizontally together with the sliding member 8.

[0065] Advantageously, the tray 83 is configured to complement the shape of the tool to be lifted, such as the punching tool A, so that the punching tool A can be simply placed on the tray without slipping off the tray 83.

[0066] See especially Figure 3-4 The slider 8 has a connecting member at its opposite end, which is in the form of a connecting plate 82. Figure 2-3 The lead screw nut 72 shown in Figure 5 is connected to the lead screw 7 so that it translates along with the lead screw nut 72 when the lead screw 7 rotates. In other words, the rotation of the lead screw 7 causes the lead screw nut 72 to translate along it, and the translation of the lead screw nut 72 drives the sliding member 8 connected to it to translate along the slide block 81. Whether the translation is diagonally upward or diagonally downward depends on the rotation direction of the actuator, such as the handwheel 5: it can be set to drive the sliding member 8 to move diagonally upward to lift the fixture A when rotated in one direction, such as counterclockwise, and to drive the guide rail to move diagonally downward to lower the fixture A when rotated in the opposite direction, such as clockwise.

[0067] Figure 9 The solid line shows tool A, which has been angularly lifted to a high position inside the vehicle body using a lifting tool, and the dashed line shows tool A', which is in a low position on the lifting tool before being lifted.

[0068] In addition, to better arrange the lead screw 7, a mounting plate 73 for the lead screw 7 is provided inside the frame. The mounting plate 73 is located at the lower part of the frame between the first side plate 9 and the second side plate 10 of the frame, and has an opening to allow the lead screw 7 to pass through, so that the lead screw nut 72 and the universal joint 64 are located on both sides of the mounting plate 73 respectively. The mounting plate 73 also serves to strengthen the frame structure and guide the lead screw.

[0069] The mounting plate 73 is thus arranged to accommodate the inclined screw 7. For example, as shown in the figure, the mounting plate is arranged inclined between the first and second side plates.

[0070] Furthermore, the lifting tool 1 according to this application also includes a locking mechanism configured to lock the rotation of the pulley, i.e., the lead screw, when the slider 8 is translated into position.

[0071] Favorably, see especially Figure 5 The locking mechanism includes a locking disc 65, which is circular and has a plurality of holes 651 distributed along its circumference. The locking disc 65 is advantageously integrally formed with the large pulley 64, forming the annular flange of the large pulley, and rests against the upright plate 3.

[0072] The locking mechanism also includes a locking pin 66, which is detachably mounted on the upright plate 3. For this purpose, as follows... Figure 5 As shown, the locking pin 66 is detachably mounted on the vertical plate 3 via an L-shaped connector 67 fixed to the upper edge of the vertical plate 3, allowing it to be inserted into the corresponding hole of the locking disc 65 when the slider 8 is translated into position, thereby locking the rotation of the large pulley. The large pulley can be released by pulling it out of the hole.

[0073] The following is a brief description of the operation of the lifting tool according to this application.

[0074] First, the operator moves the lifting tool 1 into the vehicle using, for example, the upper support rod 28, which can be used as a handle, and positions it in a specific location on the vehicle using its positioning feet 21 to 24 and positioning pins 25, 26.

[0075] Then, with tray 83 in the low position, place the punching fixture A onto tray 83, see [reference]. Figure 9 .

[0076] Then, rotating the handwheel 5 rotates the large pulley 61, which in turn drives the lead screw 7 to rotate via the belt 63 and the small pulley 62 through the universal joint 64. This drives the lead screw nut 72 with its built-in reverser to convert the rotational motion of the lead screw 7 into linear motion. Then, through the connecting plate 82 connecting the lead screw nut 72 and the sliding member 8, the guide rail 8 is driven to move obliquely upward along the slide block 81 until the punching fixture A placed on the tray 83 of the guide rail 8 reaches the high position, i.e., the working position. This lifts the punching fixture A to the position shown in the image. Figure 9 The high position shown.

[0077] At this point, the locking pin 66 can be inserted into the corresponding hole of the locking disc 65 to fix the locking disc and prevent the tooling from sliding down.

[0078] Then, the process of drilling holes in the body parts can be carried out by using the high-positioned drilling fixture A, eliminating the need for manual lifting of the heavy fixture with one hand.

[0079] Therefore, this tool has a simple, compact, and effective structure, making it particularly suitable for lifting fixtures at angles in confined spaces. It significantly reduces manual labor and saves costs.

[0080] Furthermore, this application may include any feature or combination of features, or a general description thereof, implied or expressly disclosed herein, and is not limited to any of the foregoing limitations. Any elements, features, and / or structural arrangements described herein may be combined in any suitable manner.

[0081] The specific embodiments disclosed above are merely exemplary, and it will be apparent to those skilled in the art, who benefit from the teachings herein, that this application can be modified and implemented in different but equivalent ways. For example, the method steps described above may be performed in a different order. Furthermore, the details of the construction or design shown herein are not limited except as set forth in the following claims. Therefore, it is apparent that changes and modifications can be made to the specific embodiments disclosed above, and all such variations are considered to fall within the scope and spirit of this application. Consequently, the protection sought herein is set forth in the appended claims.

Claims

1. A lifting tool for lifting a tooling in the manufacture of a motor vehicle, characterised in that, The lifting tool (1) comprises: a support structure comprising a first support member and a second support member opposite to each other; a driver (5) arranged on the first support member for providing rotary power; a screw-nut mechanism comprising a rotatable screw rod (7) and a nut assembly capable of translational movement along the screw rod (7), the screw rod (7) being in driving connection with the driver (5) via a power transmission mechanism, at least one of the screw rod (7) and the nut assembly being supported on the second support member, the screw rod (7) extending upwardly and obliquely from a first end towards the first support member to a second end towards the second support member, the nut assembly directly or indirectly carrying a workpiece (A) to be lifted.

2. A lifting tool according to claim 1, characterised in that The support structure is in the form of a frame (2) having: opposite first and second side plates (9, 10); a third side plate in the form of a vertical plate (3) connected between the first and second side plates (9, 10) and constituting the first support member; the second support member is in the form of a beam plate (4) connected between the first and second side plates (9, 10) at upper portions thereof opposite to the vertical plate (3) and arranged with a planar portion thereof obliquely downwardly towards the vertical plate (3) for supporting the screw-nut mechanism.

3. A lifting tool according to claim 2, characterised in that The nut assembly comprises a screw nut (72) sleeved on the screw rod (7), a sliding member (8) carrying the workpiece (A) to be lifted, and a connecting member (82) connecting the screw nut (72) and the sliding member (8).

4. A lifting tool according to claim 3, characterised in that The sliding member (8) of the nut assembly is in the form of a linear guide rail and is arranged in parallel and spaced apart on one side of the screw rod (7) and is translatably arranged on the beam plate (4) via a sliding seat (81) to linearly and obliquely translate with the screw nut (72) when the screw rod (7) rotates.

5. A lifting tool according to claim 4, characterised in that The power transmission mechanism comprises a belt pulley mechanism comprising: a large belt pulley (61) rotatably connected to an output shaft of the driver (5); a small belt pulley (62) rotatably connected to the screw nut (72) via a universal joint (64); a belt (63) connecting the large belt pulley (61) and the small belt pulley (62) for transmitting rotary power.

6. A lifting tool according to claim 5, characterised in that The screw rod (7) is in the form of a ball screw rod, one end of which is connected to the small belt pulley (62) via the universal joint (64) and the other end of which is supported on the beam plate (4) via a ball bearing seat (71).

7. A lifting tool according to claim 6, characterised in that The lifting tool (1) further comprises a locking mechanism comprising: a locking disc (65) in the form of a circle and integrally formed with the large belt pulley (61) and having a plurality of eyelets (651) distributed along a circumference thereof; a locking pin (66) pluggably arranged on the vertical plate (3) for being inserted into a corresponding eyelet (651) of the locking disc (65) when the linear guide rail-shaped sliding member (8) is translated to a position to lock the rotation of the large belt pulley (61).

8. A lifting tool according to claim 7, characterised in that An installation plate (73) for the screw nut (72) is further arranged in the frame (2) between the first and second side plates (9, 10) of the frame (2), the screw nut (72) and the universal joint (64) being respectively located on two sides of the installation plate (73).

9. A lifting tool according to claim 8, characterised in that A tray (83) is arranged on top of the linear guide rail-shaped sliding member (8) for carrying the workpiece (A) to be lifted.

10. A lifting tool according to any one of claims 2 to 9, characterised in that, The frame (2) further comprises: - four legs arranged at the lower part of the frame; - a positioning component comprising: - four positioning feet (21, 22, 23, 24) respectively sleeved on the four legs, having different shapes for adapting to different tooling environments to support the lifting tool (1); - at least two positioning pins (25, 26) arranged on the legs of the frame for being inserted into corresponding positioning holes in the tooling environment to position the lifting tool (1).

Images