Mechanism for manually adjusting hoisting gravity center

Abstract

The utility model relates to a mechanism for manually adjusting lifting gravity center in the technical field of lifting appliances, which comprises a cross beam, end plates are arranged at two ends of the cross beam, tops of the end plates extend upwards, a beam body of the cross beam is in sliding connection with a lifting ring structure along the axial direction, a first lead screw is rotatably connected between the tops of the two end plates, and the first lead screw penetrates through the lifting ring structure. The first lead screw is in threaded fit with the hanging ring structure, and a hand wheel is arranged at the end of the first lead screw; according to the utility model, the gravity center can be adjusted by rotating the hand wheel after an object to be lifted is lifted, and compared with the operation that the gravity center can be adjusted only after the object to be lifted and the cross beam are put down again in the prior art, the gravity center adjusting device is more convenient and quicker, and the gravity center adjusting efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting tools, in particular to a mechanism for manually adjusting the lifting center of gravity. Background Art

[0002] In lifting operations, when lifting objects of different specifications, the centers of gravity are different, and lifting tools with different structures are required. However, replacing the lifting tools is time-consuming and laborious. Therefore, a lifting tool that can adjust the position of the lifting center of gravity is needed to solve the above problems.

[0003] The existing Chinese patent with the publication number CN208471352U discloses a lifting tool with adjustable center of gravity. The top of the cross beam of this device has a plurality of center of gravity adjustment grooves evenly distributed along its axis. The lifting ring group realizes the function of adjusting the center of gravity through the disassembly and assembly cooperation with different center of gravity adjustment grooves through the load-bearing square column. However, in actual working conditions, whether the center of gravity can be adjusted can only be accurately judged after the object to be lifted is lifted. It can be seen that when adjusting the center of gravity of this device, the object to be lifted and the cross beam need to be placed on the ground for operation, and this method is still time-consuming and laborious.

[0004] Therefore, we have designed a mechanism for manually adjusting the lifting center of gravity. Summary of the Utility Model

[0005] In order to overcome the deficiencies in the background art, the utility model discloses a mechanism for manually adjusting the lifting center of gravity.

[0006] To achieve the above invention purpose, the utility model adopts the following technical scheme:

[0007] A mechanism for manually adjusting the lifting center of gravity, including a cross beam. Both ends of the cross beam are provided with end plates extending upward at the top. A lifting ring structure is slidably connected along the axis of the cross beam body. A first lead screw is rotatably connected between the tops of the two end plates. The first lead screw penetrates through the lifting ring structure and is in threaded cooperation with the lifting ring structure. And a hand wheel is provided at the end of the first lead screw.

[0008] Preferably, the cross beam is a hollow structure, and a counterweight block is movably installed along the axis in the inner cavity of the cross beam. A second lead screw is rotatably connected along the axis in the inner cavity of the cross beam. The second lead screw penetrates through the counterweight block and is in threaded cooperation with the counterweight block.

[0009] Preferably, rollers axially rolling on the bottom surface of the inner cavity of the cross beam are provided at the bottom of the counterweight block.

[0010] Preferably, the hand wheel can be detachably connected to the ends of the first lead screw and the second lead screw.

[0011] Preferably, the bottom of the end plate extends below the cross beam, and lifting holes are provided at both ends of the bottom of the end plate.

[0012] Preferably, an observation hole for penetrating through the position of the counterweight is provided along the axial direction on one side wall of the cross beam.

[0013] Preferably, a plurality of the observation holes are evenly spaced along the axial direction of the cross beam.

[0014] Preferably, a scale line for detecting the position of the lifting ring structure is provided along the axial direction on one side wall of the cross beam.

[0015] Preferably, the zero scale value of the scale line is located at the central position of the cross beam.

[0016] Preferably, the lifting ring structure includes a sliding member axially and slidably connected to the beam body of the cross beam. The sliding member is in threaded cooperation with the first lead screw, and a lifting ring is provided on the top surface of the sliding member.

[0017] Due to the adoption of the above - mentioned technical solution, the utility model has the following beneficial effects:

[0018] 1. After the object to be lifted is lifted, the operation of adjusting the center of gravity can be completed by rotating the hand wheel. Compared with the prior art that requires the object to be lifted to be put down again and the cross beam to be placed before the center of gravity can be adjusted, it is not only more convenient and fast, but also can effectively improve the efficiency of adjusting the center of gravity.

[0019] 2. The rotation of the second lead screw can drive the counterweight to move, so that the center of gravity of the cross beam and the counterweight shifts in the direction of the movement of the counterweight, realizing the function of adjusting the center of gravity; and it can also achieve a better effect of adjusting the center of gravity by combining with the movement of the lifting ring structure. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the first structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the second structure of the utility model;

[0022] Figure 3 It is a left view of the second structure of the utility model.

[0023] In the figure: 1. Cross beam; 11. Observation hole; 12. Scale line; 2. End plate; 21. Hoisting hole; 3. Lifting ring structure; 31. Sliding member; 32. Lifting ring; 4. First lead screw; 5. Hand wheel; 6. Counterweight; 61. Roller; 7. Second lead screw. Detailed Embodiments

[0024] The present utility model can be explained in detail through the following embodiments. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or positional relationship, it is only corresponding to the drawings of the present application for the convenience of describing the present utility model; it should be understood that if there are terms such as "end", "side", "end part", "side part", "transverse", "longitudinal", etc. indicating the orientation or positional relationship, it is only corresponding to the length and width of the corresponding component, that is, the "end part" indicates the head and tail regions in the length direction of the corresponding component, and the "side part" indicates the head and tail regions in the width direction of the corresponding component; it is for the convenience of describing the present utility model rather than indicating or implying that the device or element referred to must have a specific orientation.

[0025] Embodiment 1, in combination with the attached Figure 1 , a mechanism for manually adjusting the hoisting center of gravity, including a cross beam 1, and end plates 2 with their tops extending upward are provided at both ends of the cross beam 1; as required, the bottom of the end plate 2 extends below the cross beam 1, and hoisting holes 21 are provided at both ends of the bottom of the end plate 2, that is, the object to be hoisted can be hoisted through the hoisting holes 21 in cooperation with structures such as slings and suspension ropes. A sling structure 3 is slidably connected to the cross beam 1 along its axial direction, a first lead screw 4 is rotatably connected between the tops of the two end plates 2, the first lead screw 4 passes through the sling structure 3 and is in threaded cooperation with the sling structure 3, and a hand wheel 5 is provided at the end of the first lead screw 4;

[0026] Furthermore, the sling structure 3 includes a sliding member 31 slidably connected to the cross beam 1 along its axial direction, the sliding member 31 is in threaded cooperation with the first lead screw 4, and a sling 32 is provided on the top surface of the sliding member 31.

[0027] Furthermore, in order to accurately determine the position of the sling structure 3; a scale line 12 for detecting the position of the sling structure 3 is provided on one side wall of the cross beam 1 along its axial direction; furthermore, the zero scale value of the scale line 13 is located at the center position of the cross beam 1. As required, the middle part of the sliding member 31 has an observation pointer passing through the scale line 13, and the observation pointer can be a triangular hole, a pointer hole, etc. passing through the side wall of the sliding member 31 and other structures that can penetrate to the scale line 13, which is not specifically limited here.

[0028] During use, after the object to be lifted is hoisted, when the center of gravity of the combination of the object to be lifted and the lifting appliance is not on the vertical line where the lifting ring structure 3 is located, the combination of the object to be lifted and the lifting appliance will tend to tilt. At this time, the first lead screw 4 can be rotated by the handwheel 5, so that the lifting ring structure 3 moves towards the lower end of the cross beam 1 until the cross beam 1 is in an almost horizontal state. At this time, the function of center of gravity adjustment is completed. This mechanism can complete the center of gravity adjustment operation by rotating the handwheel 5 after the object to be lifted is hoisted. Compared with the prior art that requires the object to be lifted to be put down again and the cross beam to be placed before the center of gravity can be adjusted, it is not only more convenient and fast, but also can effectively improve the efficiency of center of gravity adjustment.

[0029] Embodiment 2, in combination with the attached Figures 2-3 , a mechanism for manually adjusting the lifting center of gravity. On the basis of Embodiment 1, the cross beam 1 is a hollow structure, and a counterweight 6 is movably installed along the axial direction of the inner cavity of the cross beam 1. A second lead screw 7 is rotatably connected along the axial direction of the inner cavity of the cross beam 1. The second lead screw 7 passes through the counterweight 6 and is in threaded cooperation with the counterweight 6; that is, the rotation of the second lead screw 7 can drive the counterweight 6 to move, so that the center of gravity of the cross beam 1 and the counterweight 6 shifts in the direction of movement of the counterweight 6, realizing the function of center of gravity adjustment; and it can also combine with the movement of the lifting ring structure 3 to achieve a better effect of center of gravity adjustment.

[0030] According to needs, the movement of the counterweight 6 and the lifting ring structure 3 can be independent of each other; that is, there is no transmission relationship between the second lead screw 7 and the first lead screw 4. Further, the handwheel 5 can be detachably connected to the end of the first lead screw 4 and the end of the second lead screw 7; that is, the handwheel 5 can be switched between the end of the first lead screw 4 and the end of the second lead screw 7 to realize the function of driving the first lead screw 4 to rotate or the second lead screw 7.

[0031] According to needs, the handwheel 5 can be connected to the end of the first lead screw 4 and the end of the second lead screw 7 by sleeving. At this time, the ends of the first lead screw 4 and the second lead screw 7 are flat square structures, and the handwheel 5 has a waist-shaped hole matching the flat square structure. According to needs, the end faces of the first lead screw 4 and the second lead screw 7 can also be eccentric holes, and the handwheel 5 has a plug rod that matches and inserts into the eccentric holes. Of course, the handwheel 5 can also be detachably connected to the end of the first lead screw 4 and the end of the second lead screw 7 by other means, and no specific limitation is made at this time.

[0032] According to needs, the movement of the counterweight 6 and the lifting ring structure 3 can cooperate with each other, that is, there is a transmission relationship between the second lead screw 7 and the first lead screw 4, that is, when the first lead screw 4 rotates, it drives the second lead screw 7 to rotate, so that the movement directions of the counterweight 6 and the lifting ring structure 3 are opposite. At this time, the second lead screw 7 and the first lead screw 4 can rotate in the same direction, and at this time the thread helix directions of the second lead screw 7 and the first lead screw 4 are opposite; the second lead screw 7 and the first lead screw 4 can also rotate in opposite directions, and at this time the thread helix directions of the second lead screw 7 and the first lead screw 4 are the same.

[0033] Further, for the convenience of the movement of the counterweight 6, a roller 61 axially rolled on the bottom surface of the inner cavity of the cross beam 1 is provided at the bottom of the counterweight 6.

[0034] Further, for the convenience of observing the position of the counterweight 6, an observation hole 11 for penetrating the position of the counterweight 6 is provided along the axial direction on one side wall of the cross beam 1; furthermore, in order to prevent the structural strength of the cross beam 1 from being affected by the existence of the observation hole 11, a plurality of observation holes 11 are uniformly spaced along the axial direction of the cross beam 1.

[0035] The parts not detailed in the present utility model are the prior art. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model; therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, aiming to include all changes falling within the meaning and scope of the equivalent elements within the present utility model.

Claims

1. A mechanism for manually adjusting the center of gravity of a hoisting device, characterized in that: The invention comprises a crossbeam (1), both ends of the crossbeam (1) are provided with end plates (2) with the tops extending upwards, the crossbeam (1) is slidably connected to a lifting ring structure (3) along its axial direction, a first lead screw (4) is rotatably connected between the tops of the two end plates (2), the first lead screw (4) passes through the lifting ring structure (3) and is threadably engaged with the lifting ring structure (3), and a hand wheel (5) is provided at the end of the first lead screw (4).

2. A mechanism for manually adjusting the center of gravity of a hoisting device according to claim 1, characterized in that: The crossbeam (1) is a hollow structure, and a counterweight (6) is movably mounted in the inner cavity of the crossbeam (1) along its axial direction. A second lead screw (7) is rotatably connected to the inner cavity of the crossbeam (1) along its axial direction. The second lead screw (7) passes through the counterweight (6) and is threadably engaged with the counterweight (6).

3. A mechanism for manually adjusting the center of gravity of a hoisting device according to claim 2, characterized in that: The bottom of the counterweight block (6) is provided with a roller (61) which is axially rolled on the bottom surface of the inner cavity of the crossbeam (1).

4. The mechanism for manually adjusting the center of gravity of a hoisting device according to claim 2, characterized in that: The hand wheel (5) is detachably connected to the end of the first screw (4) and the end of the second screw (7).

5. The mechanism for manually adjusting the center of gravity of a hoisting device according to claim 1, characterized in that: The bottom of the end plate (2) extends to below the crossbeam (1), and both ends of the bottom of the end plate (2) are provided with lifting holes (21).

6. The mechanism for manually adjusting the center of gravity of a hoisting device according to claim 2, characterized in that: A side wall of the cross beam (1) is provided with an observation hole (11) along its axial direction for penetrating the position of the counterweight block (6).

7. The mechanism for manually adjusting the center of gravity of a hoisting device according to claim 6, characterized in that: A plurality of observation holes (11) are evenly spaced along the axial direction of the crossbeam (1).

8. The mechanism for manually adjusting the center of gravity of a hoisting device according to claim 1, characterized in that: A scale line (12) for detecting the position of the lifting ring structure (3) is provided along the axial direction of one side wall of the cross beam (1).

9. The mechanism for manually adjusting the center of gravity of a hoisting device according to claim 8, characterized in that: The zero scale value of the scale line (12) is located at the center of the beam (1).

10. The mechanism for manually adjusting the center of gravity of a hoisting device according to claim 1, characterized in that: The lifting ring structure (3) comprises a sliding member (31) axially slidably connected to the beam body of the crossbeam (1), the sliding member (31) being threadably matched with the first lead screw (4), and a lifting ring (32) is provided on the top surface of the sliding member (31).

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