A lifting device for cement products

Abstract

This utility model provides a lifting device for cement products, including a lifting clamp with symmetrically arranged clamping plates. Two sets of connecting blocks are fixedly connected to one side of the outer shell of the lifting clamp, and a side plate matching the length of the outer shell is connected to one side of both sets of connecting blocks. The side plates have diagonally horizontally formed sliding grooves on the side facing the outer shell, and movable plates are slidably connected within each of the two sets of sliding grooves. Guide strips are provided on the side of each of the two sets of movable plates facing the clamping plates, and guide grooves are formed within each guide strip. Positioning blocks are provided on the side of each of the two sets of clamping plates facing the movable plates, and the positioning blocks are slidably engaged within the guide grooves. This utility model achieves synchronous reverse movement of the two sets of clamping plates through a gear and rack meshing linkage mechanism, completing the spacing adjustment in one step. This design solves the cumbersome problem of requiring separate adjustment of the two sets of clamping plates in the prior art, not only reducing operation steps and saving adjustment time, but also reducing the labor intensity of operators.

Description

Technical Field

[0001] This utility model belongs to the field of cement product hoisting technology, and more specifically, it relates to a hoisting device for cement products. Background Technology

[0002] Lifting is a crucial step in the production, transportation, and installation of cement products (such as precast concrete components, curbs, and covers). Currently, the industry commonly uses two sets of clamps at the bottom of lifting jigs to secure the cement products, and then uses the lifting rings at the top of the jigs in conjunction with wire ropes and mobile equipment to complete the transfer operation.

[0003] Existing lifting clamps have significant drawbacks in practical applications: due to the diverse sizes and specifications of cement products, the clamp spacing must be adjusted according to the product length before each lifting operation. However, both sets of clamps must be adjusted separately and sequentially, which is not only cumbersome and time-consuming, but also prone to human error leading to asymmetrical clamp positions, resulting in unbalanced stress on the cement product and increasing the risk of tilting and slipping during lifting. Furthermore, this step-by-step adjustment method significantly increases the labor intensity of operators and reduces overall work efficiency. Therefore, in view of these issues, this paper studies and improves the existing structure and its shortcomings to provide a lifting device for cement products, aiming to achieve greater practical value. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a hoisting device for cement products, which is achieved by the following specific technical means:

[0005] A hoisting device for cement products includes a hoisting clamp with symmetrically arranged clamping plates. Two sets of connecting blocks are fixedly connected to one side of the outer shell of the hoisting clamp. A side plate matching the length of the outer shell is connected to one side of both sets of connecting blocks. The side plate has diagonally horizontally opened sliding grooves on the side facing the outer shell. Movable plates are slidably connected in both sets of sliding grooves. An adjustment mechanism for the linkage of the two sets of clamping plates is provided inside the side plate. Guide strips are provided on the side of both sets of movable plates facing the clamping plates. Guide grooves are opened in the guide strips. Positioning blocks are provided on the side of both sets of clamping plates facing the movable plates. The positioning blocks are slidably engaged in the guide grooves. A locking mechanism is provided on one side of each movable plate to lock the relative position of the guide strips and the positioning blocks.

[0006] As a preferred technical solution of this utility model, the side plate has an installation groove connected to the two sets of sliding grooves inside. The linkage mechanism includes a gear rotatably connected to the center of the installation groove. The upper and lower sides of the gear are respectively meshed with racks parallel to the sliding grooves. The outer sides of the two sets of racks are respectively slidably attached to the side wall of the installation groove. One side of each set of racks is provided with a slider adapted to the sliding groove. One end of the slider extends to the outside of the sliding groove and is fixedly connected to the moving plate.

[0007] As a preferred technical solution of this utility model, the inner wall of the mounting groove is provided with limiting strips on the tooth sides of the two sets of racks, and the two sets of limiting strips slide and fit against the tooth sides of the corresponding racks.

[0008] As a preferred technical solution of this utility model, the locking mechanism includes two sets of fixed plates that are respectively horizontally installed on one side of the movable plate. The fixed plates, guide strips and positioning blocks have coaxial through holes in their centers. A connecting rod is slidably connected inside the through hole. The top end of the connecting rod extends to the top of the fixed plate and is fixedly connected to a pull ring. The bottom surface of the pull ring is in contact with the top surface of the fixed plate. The bottom end of the connecting rod extends to the bottom of the guide strip.

[0009] As a preferred embodiment of this utility model, the outer side of each connecting rod is connected to a limiting ring, and the bottom end of each limiting ring is in contact with the top end of the guide strip.

[0010] As a preferred embodiment of this utility model, springs are fitted on the outer sides of the connecting rods, and the two ends of the springs are respectively abutted against the top end of the limiting ring and the bottom end of the fixing plate.

[0011] As a preferred embodiment of this utility model, a lifting ring is installed at the top of the lifting clamp, and one end of the lifting ring is connected to the mobile device via a steel wire rope.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention utilizes a gear and rack meshing linkage mechanism to achieve synchronous reverse movement of two sets of clamping plates, completing the spacing adjustment in one step. This design solves the cumbersome problem of requiring separate adjustment of two sets of clamping plates in existing technologies. It not only reduces operation steps and saves adjustment time but also avoids asymmetrical clamping plate positions caused by human error, reducing the labor intensity of operators. At the same time, the sliding contact between the rack and the side wall of the mounting groove, the constraint of the rack by the limiting strip, and the matching design of the slider and the slide groove all ensure the stability of the linkage mechanism. By setting a locking mechanism, the guide strip and the positioning block can be quickly locked and separated. Without tools, operators can fix and replace the clamping plates simply by pulling the pull ring, making the operation convenient and efficient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 .

[0016] Figure 3 This is a partial structural diagram of the present invention. Figure 1 .

[0017] Figure 4 This is a partial structural diagram of the present invention. Figure 2 .

[0018] Figure 5 This is a utility model Figure 3 Enlarged diagram of point A in the middle.

[0019] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0020] 1. Clamping plate; 2. Lifting clamp; 3. Connecting block; 4. Side plate; 5. Moving plate; 6. Guide bar; 7. Positioning block; 8. Gear; 9. Rack; 10. Slider; 11. Limiting bar; 12. Fixing plate; 13. Connecting rod; 14. Pull ring; 15. Limiting ring; 16. Spring; 17. Lifting ring. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0022] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example:

[0025] As attached Figure 1 To be continued Figure 5 As shown:

[0026] This utility model provides a hoisting device for cement products, including a hoisting clamp 2 with symmetrically arranged clamping plates 1. Two sets of connecting blocks 3 are fixedly connected to one side of the outer shell of the hoisting clamp 2. A side plate 4 matching the length of the outer shell is connected to one side of the two sets of connecting blocks 3. The side plate 4 has a horizontally diagonally opened sliding groove on the side facing the outer shell. A movable plate 5 is slidably connected in each of the two sets of sliding grooves. The side plate 4 is provided with a linkage mechanism for adjusting the two sets of clamping plates 1. Guide strips 6 are provided on the side of the two sets of movable plates 5 facing the clamping plates 1. Guide grooves are opened in the guide strips 6. Positioning blocks 7 are provided on the side of the two sets of clamping plates 1 facing the movable plates 5. The positioning blocks 7 are slidably engaged in the guide grooves. A locking mechanism is provided on one side of the movable plates 5 to lock the relative position of the guide strips 6 and the positioning blocks 7.

[0027] The side plate 4 has an internal mounting groove that communicates with the two sets of sliding grooves. The linkage mechanism includes a gear 8 rotatably connected to the center of the mounting groove. The upper and lower sides of the gear 8 are respectively meshed with racks 9 parallel to the sliding grooves. The outer sides of both sets of racks 9 are slidably attached to the sidewalls of the mounting grooves. Each set of racks 9 has a slider 10 adapted to the sliding groove on one side, and one end of each slider 10 extends to the outside of the sliding groove and is fixedly connected to the moving plate 5. This design enables synchronous reverse movement of the two sets of clamping plates 1. The design of the slider 10 being smaller than the rack 9 ensures stable meshing between the rack 9 and the gear 8, while also preventing dust from entering the mounting groove, making the linkage mechanism more reliable.

[0028] The inner wall of the mounting groove is provided with limiting strips 11 on the tooth sides of the two sets of racks 9. The two sets of limiting strips 11 slide and fit against the tooth sides of the corresponding racks 9, which can provide effective constraints on the movement of racks 9, ensure that gears 8 and racks 9 always maintain a stable transmission relationship, and extend the service life of racks 9 and gears 8.

[0029] The locking mechanism includes two sets of fixed plates 12 horizontally mounted on one side of the movable plate 5. The fixed plates 12, guide strips 6, and positioning blocks 7 have coaxial through holes at their centers. A connecting rod 13 is slidably connected inside the through holes. The top end of the connecting rod 13 extends above the fixed plates 12 and is fixedly connected to a pull ring 14. The bottom surface of the pull ring 14 is in contact with the top surface of the fixed plates 12. The bottom end of the connecting rod 13 extends below the guide strips 6. When the clamping plate 1 needs to be replaced, the guide strips 6 and positioning blocks 7 can be quickly locked and separated without tools, enhancing the practical value of the device.

[0030] Each connecting rod 13 is connected to a limiting ring 15 on its outer side, and the bottom end of each limiting ring 15 is in contact with the top end of each guide bar 6. The limiting ring 15 can provide axial constraint to the connecting rod 13. At the same time, the close contact between the limiting ring 15 and the guide bar 6 increases the contact area, disperses the locking force, and makes the fixing effect of the locking mechanism more stable.

[0031] The connecting rod 13 is fitted with a spring 16 on its outer side, and the two ends of the spring 16 are respectively abutted against the top end of the limiting ring 15 and the bottom end of the fixing plate 12, which can provide continuous elastic pressure for the locking mechanism, making the locking effect more reliable and improving the durability and ease of operation of the device.

[0032] The top of the lifting clamp 2 is equipped with a lifting ring 17, one end of which is connected to the mobile device via a wire rope, providing a reliable power connection for the lifting device and enhancing its applicability.

[0033] The working principle of this embodiment:

[0034] When using the hoisting device, first pull out the fixing pins used to fix the clamping plates 1 to release the initial locking state of the clamping plates 1. Then pull one set of clamping plates 1. This force is transmitted to the gear 8 in the mounting groove of the side plate 4, causing the gear 8 to rotate. The gear 8 meshes with the racks 9 on its upper and lower sides. Since the outer sides of the two sets of racks 9 are slidably attached to the side wall of the mounting groove and cannot be laterally offset under the constraint of the limit strip 11, the rotation of the gear 8 will drive the two sets of racks 9 to move horizontally in opposite directions parallel to the slide groove. This reverse movement is transmitted to the moving plate 5 through the slider 10 on one side of the rack 9, causing the two sets of moving plates 5 to slide synchronously in opposite directions along the slide groove. Finally, the distance between the two sets of clamping plates 1 is adjusted synchronously in opposite directions, thereby quickly adapting to cement slabs of different sizes.

[0035] After the clamping plates 1 are adjusted to the appropriate spacing, insert the fixing pins to lock their positions. Then, place the two sets of clamping plates 1 on both sides of the cement board. With the coordinated action of the lifting rings 17, the wire rope, and the mobile equipment, the clamping plates 1 form a stable clamp on the cement board, and then the cement board can be safely transferred to the designated location.

[0036] When it is necessary to replace two sets of clamping plates 1, pull the pull ring 14 upwards to move the connecting rod 13 upwards and compress the spring 16, so that the connecting rod 13 separates from the through hole of the guide strip 6, releasing the locking constraint on the guide strip 6 and the positioning block 7. Then, slide the positioning block 7 on one side of the clamping plate 1 out from the guide groove of the guide strip 6 on one side of the moving plate 5, and then insert the new clamping plate 1 along the guide groove through the positioning block 7 on one side. After it is inserted into place, the pull ring 14 can be released, and the connecting rod 13 returns to its original position under the elastic force of the spring 16, so that the connecting rod 13 passes through the coaxial through hole of the guide strip 6 and the positioning block 7 in sequence. Through the contact of the limiting ring 15 with the top of the guide strip 6 and the contact of the pull ring 14 with the fixing plate 12, the guide strip 6 and the positioning block 7 are double locked, completing the replacement of the clamping plate 1.

[0037] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A hoisting device for cement products, comprising hoisting clamps (2) symmetrically arranged with clamping plates (1), characterized in that: Two sets of connecting blocks (3) are fixedly connected to one side of the outer shell of the hoisting clamp (2). The two sets of connecting blocks (3) are connected to a side plate (4) that matches the length of the outer shell. The side plate (4) has a horizontally diagonal groove on the side facing the outer shell. The two sets of sliding grooves are slidably connected to a moving plate (5). The side plate (4) is provided with a linkage mechanism to adjust the two sets of clamping plates (1). The two sets of moving plates (5) are provided with guide strips (6) on the side facing the clamping plate (1). The guide strips (6) are provided with guide grooves. The two sets of clamping plates (1) are provided with positioning blocks (7) on the side facing the moving plate (5). The positioning blocks (7) are slidably fitted inside the guide grooves. The moving plate (5) is provided with a locking mechanism to lock the relative position of the guide strips (6) and the positioning blocks (7).

2. The hoisting device for cement products as described in claim 1, characterized in that: The side plate (4) has an installation groove connected to the two sets of sliding grooves. The linkage mechanism includes a gear (8) rotatably connected to the center of the installation groove. The upper and lower sides of the gear (8) are respectively meshed with racks (9) parallel to the sliding grooves. The outer sides of the two sets of racks (9) are respectively slidably attached to the side wall of the installation groove. One side of each set of racks (9) is provided with a slider (10) adapted to the sliding groove. One end of the slider (10) extends to the outside of the sliding groove and is fixedly connected to the moving plate (5).

3. The hoisting device for cement products as described in claim 2, characterized in that: The inner wall of the mounting groove is provided with limiting strips (11) on the tooth sides of the two sets of racks (9), and the two sets of limiting strips (11) slide and fit against the tooth sides of the corresponding racks (9).

4. The hoisting device for cement products as described in claim 1, characterized in that: The locking mechanism includes two sets of fixed plates (12) that are horizontally installed on one side of the movable plate (5). The fixed plate (12), guide strip (6) and positioning block (7) have coaxial through holes in their centers. A connecting rod (13) is slidably connected inside the through hole. The top end of the connecting rod (13) extends above the fixed plate (12) and is fixedly connected to a pull ring (14). The bottom surface of the pull ring (14) is in contact with the top surface of the fixed plate (12). The bottom end of the connecting rod (13) extends below the guide strip (6).

5. The hoisting device for cement products as described in claim 4, characterized in that: Each of the connecting rods (13) is connected to a limiting ring (15), and the bottom end of each limiting ring (15) is in contact with the top end of the guide strip (6).

6. The hoisting device for cement products as described in claim 4, characterized in that: Springs (16) are fitted on the outer side of each connecting rod (13), and the two ends of each spring (16) are respectively abutted against the top end of the limiting ring (15) and the bottom end of the fixing plate (12).

7. The hoisting device for cement products as described in claim 1, characterized in that: The top of the lifting clamp (2) is equipped with a lifting ring (17), one end of which is connected to the mobile device via a wire rope.

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