A screw jack device for large workpiece support levelling

Abstract

The utility model relates to a screw jack device for large -scale work piece support leveling, including support frame, screw rod, hand wheel, bracket and bolt, support frame whole presents the trapezoidal structure of little up big, is equipped with the mounting hole on the support frame, is equipped with the stop hole on the upper portion of mounting hole, hand wheel is installed in the stop hole, and can rotate relative to support frame, screw rod lower part passes in hand wheel and mounting hole in proper order, and is fixedly connected through trapezoidal thread and hand wheel screw thread cooperation, upper portion passes through bolt and bracket fixed connection, the utility model discloses through support frame adopts the trapezoidal structure of little up big, greatly enhanced the overall rigidity, effectively reduced the risk of falling when supporting large -scale work piece, provides the stable support foundation for large -scale work piece, guarantees the security of operation process, simultaneously through the trapezoidal thread cooperation of hand wheel and screw rod, single person can easily realize the lifting operation of screw rod, need not many people cooperation, significantly improves the operation efficiency, can satisfy the demand of large -scale work piece support leveling fast.

Description

Technical Field

[0001] This utility model relates to the field of jack technology, specifically to a screw jack device for supporting and leveling large workpieces. Background Technology

[0002] In the manufacturing and processing of large workpieces, especially in the production of heavy workpieces weighing about 2-3 tons, such as ceramic pump bodies, it is necessary to support and lift the workpieces and ensure that they are in a horizontal state for subsequent operations. Currently, screw jacks are commonly used in production to complete the above operations. However, existing screw jacks mostly use hollow cylinders as supports and are operated via handles, which has the following drawbacks and makes them difficult to adapt to actual needs: 1. Insufficient structural stability and prominent safety risks: The lack of reinforced support structure design makes it prone to instability when supporting large workpieces weighing 2-3 tons, and there is even a risk of workpiece tipping over. This may not only cause damage to the workpiece, but also pose a serious threat to the personal safety of on-site operators, resulting in significant safety hazards.

[0003] 2. Complex and inefficient operation with poor adaptability: It requires multiple people to complete the workpiece leveling operation, and the operation process is cumbersome; it is also impossible to achieve fast and accurate height adjustment, which makes it difficult to meet the demand for efficient leveling of large workpieces in the production process, resulting in low overall operation efficiency. Therefore, there is an urgent need to develop a screw jack device that is structurally stable, easy to operate, and highly safe in order to solve the above-mentioned technical problems. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a screw jack device for supporting and leveling large workpieces.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A screw jack device for supporting and leveling large workpieces includes a support frame, a screw, a handwheel, a bracket, and bolts. The support frame has a trapezoidal structure that is smaller at the top and larger at the bottom. The support frame has mounting holes, and the upper part of the mounting holes has a stop hole. The handwheel is installed in the stop hole and can rotate relative to the support frame. The lower part of the screw passes through the handwheel and the mounting hole in sequence, and engages with the handwheel thread through a trapezoidal thread. The upper part is fixedly connected to the bracket by bolts.

[0006] The beneficial effects of this utility model are: 1. Strong structural stability: The support frame adopts a trapezoidal structure that is smaller at the top and larger at the bottom, which greatly enhances the overall rigidity and effectively reduces the risk of tipping over when supporting large workpieces. It provides a stable support foundation for large workpieces and ensures the safety of the operation process. 2. Convenient and safe operation: The screw can be raised and lowered easily by a single person through the trapezoidal thread of the handwheel and the screw, without the need for multiple people to cooperate, which significantly improves the work efficiency and can quickly meet the needs of supporting and leveling large workpieces.

[0007] Furthermore, the support frame is welded from a base plate, angle steel supports, and a top plate, with a mounting hole in the center of the top plate. The upper and lower end faces of the support frame are horizontal. The welded, integrated structure avoids the gap problems of detachable structures such as bolted connections, improves the overall rigidity of the support frame, and reduces deformation after long-term load-bearing.

[0008] Furthermore, the base plate is a single piece of steel plate, which increases the contact area with the ground and improves the fit between the base plate and the ground. This allows for the even transmission of contact pressure between the device and the ground, preventing the base plate from deforming or sinking into the ground due to localized stress concentration.

[0009] Furthermore, the angle steel supports are obliquely welded with reinforcing ribs, which form a triangular stable structure to disperse the local load on the angle steel supports, specifically enhance the shear and bending resistance of the angle steel supports, prevent the weight of large workpieces from causing lateral deformation of the angle steel supports, and increase the overall strength.

[0010] Furthermore, the mounting hole is a hollow cylindrical structure, coaxially arranged with the stop hole, and the inner diameter of the mounting hole is smaller than that of the stop hole. The hollow cylindrical structure is adapted to the shape of the screw, providing stable vertical guidance for the screw and preventing radial swaying during screw lifting and lowering, thus ensuring the verticality of the screw during the lifting and lowering process. The inner diameter of the mounting hole is smaller than that of the stop hole, making the stop hole form a stepped positioning structure, which can accurately accommodate the lower part of the handwheel. The coaxial design ensures that the center line of the stop hole and the mounting hole are aligned, further preventing the screw from tilting.

[0011] Furthermore, the handwheel has a wheel-shaped structure with multiple reinforcing ribs evenly distributed circumferentially. It has a through trapezoidal threaded hole at the center and a locating boss integrally formed at the bottom to mate with the locating hole. The wheel-shaped structure and evenly distributed reinforcing ribs make it easier for the operator to grip and apply force (less effort than a handle, suitable for single-person operation) and enhance the handwheel's rigidity, preventing deformation due to uneven force during rotation. The trapezoidal thread, compared to ordinary triangular threads, has advantages such as higher load-bearing capacity, higher transmission efficiency, and wear resistance, and also has good self-locking performance, ensuring that it will not automatically descend due to external force after a heavy object is raised. The locating boss and the locating hole of the support frame provide precise positioning and flexible rotation of the handwheel, making it more stable during rotation and preventing wobbling.

[0012] Furthermore, the lower part of the screw is provided with a trapezoidal threaded section that matches the trapezoidal threaded hole of the handwheel, the upper part is provided with a stepped stop, and the top is provided with a bolt hole. The trapezoidal threaded section of the screw and the trapezoidal threaded hole of the handwheel are precisely matched to ensure the smoothness and accuracy of the threaded transmission and guarantee the transmission accuracy between the two; the stepped stop can accurately position with the lower part of the bracket to avoid radial offset during the assembly of the bracket and the screw, ensuring that the bracket is evenly stressed when carrying the workpiece and preventing the workpiece from being misaligned due to bracket offset; the top bolt hole provides a reliable connection point for fixing the screw and the bracket.

[0013] Furthermore, the upper part of the bracket is made of steel plate with side flanges on both sides and a U-shaped cross-section. The lower part of the bracket is a hollow cylinder with a through-threaded hole on the lower side wall. The U-shaped structure of the upper part can well adapt to workpieces of different shapes, and the side flanges can prevent the workpiece from shifting on the bracket, thus playing a limiting role. The hollow cylinder at the bottom and the stepped stop of the screw provide precise guidance for the assembly of the bracket and the screw, ensuring that the bracket and the screw are coaxial and preventing the bracket from tilting. The through-threaded hole on the side wall provides a channel for bolt connection.

[0014] Furthermore, the bolt passes through the through-threaded hole of the bracket and then engages in the bolt hole of the screw, preventing relative rotation or axial loosening of the bracket and screw during load-bearing, thus achieving reliable fixation of the bracket and screw. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the support frame structure according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the screw structure according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the handwheel structure according to an embodiment of the present utility model; The attached diagram lists the components represented by each number as follows: 1. Bracket; 2. Screw; 21. Trapezoidal threaded section; 22. Stepped stop; 23. Bolt hole; 3. Handwheel; 31. Trapezoidal threaded hole; 32. Stop boss; 4. Support frame; 41. Mounting hole; 42. Stop hole; 43. Base plate; 44. Angle steel support; 45. Top plate; 46. Reinforcing rib; 5. Bolt. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] In the description of this application, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0018] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0019] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0020] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0021] like Figures 1 to 4 As shown, this embodiment provides a screw jack device for supporting and leveling large workpieces, including a support frame 4, a screw 2, a handwheel 3, a bracket 1, and bolts 5. The support frame 4 has a trapezoidal structure that is smaller at the top and larger at the bottom. The support frame 4 is provided with a mounting hole 41, and a stop hole 42 is provided at the top of the mounting hole 41. The handwheel 3 is installed in the stop hole 42 and can rotate relative to the support frame 4. The lower part of the screw 2 passes through the handwheel 3 and the mounting hole 41 in sequence, and is threaded with the handwheel 3 through a trapezoidal thread. The upper part is fixedly connected to the bracket 1 by bolts 5.

[0022] Specifically: The support frame 4 is welded from a base plate 43, angle steel supports 44, and a top plate 45. The top plate 45 has a central mounting hole 41, and the upper and lower end faces of the support frame 4 are horizontal. This integrated welded structure avoids the gap problems associated with detachable structures like bolted connections, improving the overall rigidity of the support frame 4 and reducing deformation after long-term load-bearing. In this embodiment, the base plate 43 is a single piece of steel, increasing the contact area with the ground and improving its fit. This allows for even distribution of the contact pressure between the device and the ground, preventing deformation or sinking of the base plate 43 due to localized stress concentration, and preventing support imbalance caused by partial suspension of the base plate 43. In this embodiment, the angle steel supports 44 are diagonally welded with reinforcing ribs 46, forming a triangular stable structure that disperses the localized load on the angle steel supports 44, specifically enhancing their shear and bending resistance, preventing lateral deformation of the angle steel supports 44 due to the weight of large workpieces, and increasing overall strength. In this embodiment, the mounting hole 41 is a hollow cylindrical structure, and the mounting hole 41 and the stop hole 42 are coaxially arranged. The inner diameter of the mounting hole 41 is smaller than the inner diameter of the stop hole 42. The hollow cylindrical structure is adapted to the shape of the screw 2, providing a stable vertical guide for the screw 2, avoiding radial swaying when the screw 2 is raised or lowered, and ensuring the verticality of the screw 2 during the raising and lowering process. The inner diameter of the mounting hole 41 is smaller than the inner diameter of the stop hole 42, so that the stop hole 42 forms a stepped positioning structure, which can accurately accommodate the lower part of the handwheel 3. The coaxial design ensures that the center line of the stop hole 42 and the mounting hole 41 are consistent, further preventing the screw 2 from tilting.

[0023] The handwheel 3 has a wheel-shaped structure with multiple reinforcing ribs evenly distributed circumferentially (in this embodiment, three reinforcing ribs evenly spaced at 120° intervals are distributed circumferentially). The center of the handwheel 3 has a through trapezoidal threaded hole 31, and the lower part has an integrally formed stop boss 32 that mates with the stop hole 42. The wheel-shaped structure and evenly distributed reinforcing ribs make it easier for the operator to grip and apply force (less effort than a handle, suitable for single-person operation), and also enhance the rigidity of the handwheel 3 itself, preventing deformation due to uneven force when the handwheel 3 rotates. Compared with ordinary triangular threads, trapezoidal threads have the advantages of strong load-bearing capacity, high transmission efficiency, and wear resistance, and also have good self-locking performance, ensuring that the handwheel will not descend on its own due to external force after the heavy object is raised. The stop boss 32 is positioned with the stop hole 42 of the support frame 4, realizing precise positioning and flexible rotation of the handwheel 3. The handwheel 3 is more stable when rotating and will not wobble.

[0024] The lower part of the screw 2 is provided with a trapezoidal thread section 21 (the trapezoidal thread section 21 is a single-start trapezoidal thread) that matches the trapezoidal threaded hole 31 of the handwheel. The upper part is provided with a stepped stop 22, and the top is provided with a bolt hole 23. The trapezoidal thread section 21 of the screw 2 and the trapezoidal threaded hole 31 of the handwheel 3 are precisely matched to ensure the smoothness and accuracy of the threaded transmission and to guarantee the transmission accuracy between the two. The stepped stop 22 can be precisely positioned with the lower part of the bracket 1 to avoid radial offset when the bracket 1 and the screw 2 are assembled, ensuring that the bracket 1 is evenly stressed when carrying the workpiece and preventing the workpiece from being misaligned due to the bracket 1. The top bolt hole 23 provides a reliable connection point for fixing the screw 2 and the bracket 1.

[0025] The upper part of the bracket 1 is a steel plate with side flanges on both sides and a U-shaped cross-section. The lower part of the bracket 1 is a hollow cylinder with a through threaded hole on the lower side wall. The U-shaped structure of the upper part can well adapt to workpieces of different shapes, and the side flanges can prevent the workpiece from shifting on the bracket 1, thus playing a limiting role. The hollow cylinder at the bottom and the stepped stop 22 of the screw 2 provide precise guidance for the assembly of the bracket 1 and the screw 2, ensuring that the bracket 1 and the screw 2 are coaxial and preventing the bracket 1 from tilting. The through threaded hole on the side wall provides a channel for the bolt 5 connection.

[0026] The bolt 5 passes through the through threaded hole of the bracket 1 and is then inserted into the bolt hole 23 of the screw 2 to prevent relative rotation or axial loosening of the bracket 1 and the screw 2 during the load-bearing process, thereby achieving reliable fixation of the bracket 1 and the screw 2.

[0027] The working principle of the above structure: During installation, first, the trapezoidal threaded section 21 of the screw 2 is fitted into the trapezoidal threaded hole 31 of the handwheel 3 to achieve threaded engagement. Then, the screw 2 and handwheel 3 are inserted as a whole into the mounting hole 41 of the support frame 4 and positioned by the stop boss 32 and the stop hole 42. Next, the bracket 1 is fitted onto the upper end of the screw 2 through the lower hollow cylinder and positioned with the stepped stop 22. Finally, the bolt 5 is inserted into the bolt hole 23 of the screw 2 through the through threaded hole of the bracket 1 and tightened to prevent relative rotation between the two.

[0028] When using this device, 3-4 screw jacks can be evenly arranged according to the workpiece size and following the mechanical principle of "three points for surface positioning and four points for surface stabilization." A level monitoring tool (such as a spirit level or laser level) should be installed on the workpiece. Each device corresponds to a support point on the workpiece and its lifting height can be adjusted independently.

[0029] During adjustment, rotating the handwheel 3 drives the screw 2 to move vertically up and down along the support frame 4 through the threaded structure, which in turn drives the bracket 1 and the workpiece it supports to rise or fall synchronously. The operator can precisely control the amount of screw lifting by rotating the handwheel, and with the help of a level monitoring tool, the support and leveling of large workpieces can be achieved.

[0030] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A screw jack device for supporting and leveling large workpieces, characterized in that, Includes support frame, screw, handwheel, bracket, and bolts; The support frame has an overall trapezoidal structure that is smaller at the top and larger at the bottom. The support frame is provided with mounting holes, and a stop hole is provided at the top of the mounting holes. The handwheel is installed in the stop hole and can rotate relative to the support frame; The lower part of the screw passes through the handwheel and the mounting hole in sequence, and engages with the handwheel thread through a trapezoidal thread. The upper part is fixedly connected to the bracket by bolts.

2. The screw jack device for supporting and leveling large workpieces according to claim 1, characterized in that, The support frame is welded from a base plate, angle steel supports, and a top plate. The top plate has a mounting hole in the center, and the upper and lower end faces of the support frame are horizontal.

3. A screw jack device for supporting and leveling large workpieces according to claim 2, characterized in that, The base plate is a single piece of steel plate.

4. A screw jack device for supporting and leveling large workpieces according to claim 2, characterized in that, The angle steel supports are welded diagonally with reinforcing ribs.

5. A screw jack device for supporting and leveling large workpieces according to claim 1 or 2, characterized in that, The mounting hole is a hollow cylindrical structure, and the mounting hole and the stop hole are coaxially arranged. The inner diameter of the mounting hole is smaller than the inner diameter of the stop hole.

6. A screw jack device for supporting and leveling large workpieces according to claim 1, characterized in that, The handwheel has a wheel-shaped structure with multiple reinforcing ribs evenly distributed around its circumference. It has a through trapezoidal threaded hole in the center and a stop boss integrally formed at the bottom to mate with the stop hole.

7. A screw jack device for supporting and leveling large workpieces according to claim 1, characterized in that, The lower part of the screw is provided with a trapezoidal threaded section that matches the trapezoidal threaded hole of the handwheel, the upper part is provided with a stepped stop, and the top is provided with a bolt hole.

8. A screw jack device for supporting and leveling large workpieces according to claim 1, characterized in that, The upper part of the bracket is a steel plate with side guards on both sides and a U-shaped cross section. The lower part of the bracket is a hollow cylinder with a through threaded hole on the lower side wall.

9. A screw jack device for supporting and leveling large workpieces according to claim 1, characterized in that, The bolt passes through the through-threaded hole of the bracket and then engages in the bolt hole of the screw.

Images