Automatic locking lifting appliance

Abstract

The utility model discloses an automatic locking lifting appliance which comprises a sliding seat, a lifting rod, a locking assembly, a movable arm, a first connecting rod and a second connecting rod, a movable hole and a locking assembly hole are formed in the sliding seat, one end of the locking assembly hole is communicated with the side wall of the movable hole, the lifting rod penetrates through the movable hole to be movably connected with the sliding seat, and a limiting groove is formed in the side wall. The movable arms are arranged in the circumferential direction of the suspender, one ends of the movable arms are hinged to the first connecting rod, and the other ends of the movable arms extend towards the side away from the suspender to form a lifting hook. The locking assembly comprises an elastic piece and a limiting piece which are arranged in the locking assembly hole, the elastic piece presses the limiting piece to enable the limiting piece to abut against the side wall of the hanging rod, and the limiting piece is matched with the limiting groove and can enter and exit from the limiting groove along with movement of the hanging rod. The lifting appliance has an automatic locking function and is stable in lifting.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting equipment, in particular to an automatic locking hoisting device. Background Art

[0002] In the process of processing and assembling the rim, a hoist is often used to hoist the rim. For example, there is a scissor-type rim hoist (CN213679450U) including a lifting ring, a sliding sleeve, a return spring, a cone, a locking nut, a movable arm and a limit bolt. The hoist uses the weight of the rim to drive the movable arm downward and the limit cone upward, so that the movable arm expands and clamps with the stopper of the rim to achieve stable lifting of the rim, which can effectively solve the technical problem of unstable center of gravity and low efficiency when hoisting the rim.

[0003] However, due to the influence of the reset spring, when using this hoist, it is necessary to manually hold the movable arm, and then cooperate with the electric hoist to move upward a certain distance, expand the distance between the two movable arms, and then release the movable arm, and use the weight of the rim to keep the movable arm in a tensioned state, and then clamp the rim stop. Before the hoist rises, even if the movable arm has been expanded to the extent that the rim stop can be clamped, the worker cannot release the movable arm. Once the worker relaxes and releases the movable arm in advance, the distance between the two movable arms will be shortened, and the tension state cannot be maintained to clamp the rim stop, affecting the lifting and making the operation more laborious. In addition, after lifting, if the weight of the rim is insufficient or the movable arm is hit, there is a risk that the movable arm will shrink and fail to clamp. Utility Model Content

[0004] The utility model aims to provide an automatic locking sling which can be locked automatically and has stable lifting.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] 14. The automatic locking sling according to claim 13, wherein the locking assembly comprises a movable hole and a locking assembly hole, the movable hole is through-set, and one end of the locking assembly hole is connected to the side wall of the movable hole; the sling is inserted into the movable hole and is movably connected to the slide seat along the axial direction of the movable hole, and a limiting groove is provided on the side wall of the sling; the movable arm is arranged along the circumference of the sling, one end of the movable arm is hinged with a first connecting rod, and the other end is extended to form a hook, and a second connecting rod is arranged between the movable arm and the sling; the first connecting rod is hinged to the slide, and the direction of the rotation axis of the hinged movable arm and the slide is perpendicular to the axial direction of the movable hole; the hook is located on the side of the movable arm away from the sling; the second connecting rod is hinged to the movable arm and the sling respectively, and the direction of the rotation axis of the hinge is perpendicular to the axial direction of the movable hole.

[0007] The locking assembly includes an elastic member and a limiting member, both of which are arranged in the locking assembly hole. The elastic member presses the limiting member and makes the limiting member press against the side wall of the suspension rod. The position and shape of the limiting member correspond to the limiting groove, and the limiting member can enter and exit the limiting groove as the suspension rod moves.

[0008] Furthermore, the locking assembly hole is through-set and has an internal thread, and the locking assembly also includes a locking bolt, which is locked into the locking assembly hole and is located at an end of the locking assembly hole away from the suspension rod, and the elastic member is located between the limiting member and the locking bolt, and respectively resists the limiting member and the locking bolt.

[0009] Furthermore, a receiving hole is provided at the end of the locking bolt, and the elastic member is partially inserted into the receiving hole.

[0010] Furthermore, the limiting groove is an annular groove arranged around the suspension rod.

[0011] Furthermore, the cross-sectional profile of the limiting groove is V-shaped or arc-shaped, and the cross-sectional shape of the limiting member is circular or D-shaped.

[0012] Furthermore, a lifting ring is fixedly provided on the top of the suspension rod, and a pulling ring is fixedly provided on the top of the sliding seat.

[0013] Furthermore, a limit seat is fixedly provided on the suspension rod, and the limit seat is located directly below the slide seat. When the limit member is located inside the limit groove, the bottom of the slide seat abuts against the top of the limit seat.

[0014] Furthermore, a plurality of fixing seats are arranged on the boom, and the fixing seats are arranged at intervals along the axial direction of the boom. The second connecting rod is hinged to the boom through the fixing seats, and the second connecting rod connected to the same movable arm is arranged at intervals along the axial direction of the boom and is arranged parallel to each other.

[0015] Furthermore, the bottom end surface position of the suspension rod is lower than the bottom end surface position of the movable arm.

[0016] The utility model has the following beneficial effects:

[0017] 1. The hoist can be used to hoist workpieces such as rims and tires. Before hoisting the workpiece, the slide and the boom can slide relative to each other to drive the expansion of each movable arm. After expansion, the hook on the movable arm can be moved to the bottom of the workpiece, waiting to support the workpiece. At the same time, the slide and the boom can be automatically locked by the locking assembly to keep the expansion state of the movable arm. After locking, the hoist is raised, and the hook on the movable arm can hold the workpiece and drive the workpiece to rise. Since the hoist has an automatic locking function, after locking, even if the operator is away and the hoist is not raised in time, the movable arm will not retract to affect subsequent lifting. At the same time, the movable arm is not easy to retract after the hoist is raised, and the lifting is relatively stable.

[0018] 2. The sling has a simple structure, is easy to operate and maintain, and has a low manufacturing cost, making it easy to mass produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the sliding seat in a top view of the utility model.

[0021] Figure 3 for Figure 2 Schematic diagram of the AA section structure.

[0022] Figure 4 This is a schematic diagram of the suspension rod structure of the utility model.

[0023] Figure 5 This is one of the schematic diagrams of the connection structure between the slide seat and the locking assembly in the unlocked state of the utility model.

[0024] Figure 6 This is one of the schematic diagrams of the connection structure between the slide seat and the locking assembly in the unlocked state of the utility model.

[0025] Figure 7 It is a schematic diagram of the connection structure between the slide seat and the locking assembly in the locked state of the utility model.

[0026] Figure 8 This is a diagram of the use state of the utility model when the movable arm is in a retracted state.

[0027] Fig. 9 This is a diagram of the use state of the utility model when the movable arm is in the expanded state.

[0028] Explanation of the symbols of the main components: 1. Sliding seat; 11. Movable hole; 12. Locking assembly hole; 13. Pull ring; 2. Lifting rod; 21. Limiting groove; 22. Limiting seat; 23. Fixed seat; 24. Lifting ring; 3. Movable arm; 31. Hook; 4. First connecting rod; 5. Second connecting rod; 6. Locking assembly; 61. Elastic part; 62. Limiting part; 63. Locking bolt; 631. Accommodating hole; 7. Workpiece; 8. Sleeper. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0030] like Figure 1-9 As shown, the utility model discloses an automatic locking sling, comprising a slide 1, a suspension rod 2, a locking assembly 6 and a movable arm 3. A movable hole 11 and a locking assembly hole 12 are provided on the slide 1. The movable hole 11 is vertically penetrated at the center of the slide 1, and the locking assembly hole 12 is provided on the side wall of the slide 1, and the end thereof penetrates the side wall of the movable hole 11. The suspension rod 2 is vertically penetrated in the movable hole 11, and is movably connected to the slide 1 along the axial direction of the movable hole 11, that is, in the vertical direction. A lifting ring 24 is fixedly provided on the top of the suspension rod 2 to lift the sling, and a pull ring 13 is fixedly provided on the top of the slide 1 to drive the slide 1 and the suspension rod 2 to slide relative to each other. A limiting groove 21 cooperating with the locking assembly 6 is provided on the side wall of the suspension rod 2. In addition, the bottom end surface of the suspension rod 2 is lower than the bottom end surface of the movable arm 3. When the sling is placed vertically on the ground, the movable arm 3 can be prevented from contacting the ground and affecting the contraction and expansion of the movable arm 3.

[0031] At least two movable arms 3 are provided, and are evenly arranged along the circumference of the suspension rod 2. In order to make the lifting more stable, in this embodiment, three movable arms 3 are evenly arranged and vertically arranged. A first connecting rod 4 is hinged at one end of the movable arm 3, and the other end extends to form a hook 31. A second connecting rod 5 is provided between the movable arm 3 and the suspension rod 2. Among them, the hook 31 is located on the side of the movable arm 3 away from the suspension rod 2, and the end of the first connecting rod 4 away from the movable arm 3 is hinged to the slide 1, and the rotation axis direction of the hinged movable arm 3 and the slide 1 is perpendicular to the axial direction of the movable hole 11. The two ends of the second connecting rod 5 are respectively hinged to the middle part of the movable arm 3 and the middle part of the suspension rod 2, and the rotation axis direction of the hinge is perpendicular to the axial direction of the movable hole 11.

[0032] The first connecting rods 4 are arranged one by one with the movable arms 3, and the number of the second connecting rods 5 can be increased or decreased according to the length of the suspension rod 2. The second connecting rods 5 connected to the same movable arm 3 are arranged at intervals along the axial direction of the suspension rod 2, and the second connecting rods 5 connected to the same movable arm 3 are preferably arranged parallel to each other to stably support and drive the movable arm 3. In order to facilitate the installation of the second connecting rods 5, a plurality of fixing seats 23 are arranged at intervals along the axial direction of the suspension rod 2, and each second connecting rod 5 is hinged to the suspension rod 2 through the fixing seat 23, so that the movable arm 3 can be evenly stressed when it contracts and expands. In this embodiment, each movable arm 3 is correspondingly hinged with two second connecting rods 5, and two fixing seats 23 are correspondingly provided.

[0033] The locking assembly 6 includes an elastic member 61 and a limit member 62, and both the elastic member 61 and the limit member 62 are arranged in the locking assembly hole 12. Among them, the elastic member 61 is preferably a spring, one end of the elastic member 61 is against the slide seat 1, and the other end presses the limit member 62, so that the limit member 62 is always against the side wall of the suspension rod 2. The position and shape of the limit member 62 are set corresponding to the limit groove 21 on the suspension rod 2. To ensure smooth locking and unlocking, the cross-sectional profile of the limit groove 21 is V-shaped or arc-shaped, and the cross-sectional shape of the limit member 62 is circular or D-shaped. The limit groove 21 is an annular groove arranged around the suspension rod 2 for alignment. Preferably, the cross-sectional profile of the limit groove 21 is arc-shaped, and the limit member 62 adopts a steel ball.

[0034] When the suspension rod 2 and the slide 1 slide relative to each other, the limit groove 21 on the suspension rod 2 can move closer to or farther away from the limit member 62. When the limit member 62 slides to face the limit groove 21, under the action of the elastic member 61, the end of the limit member 62 can enter the limit groove 21, thereby locking the slide 1 and the suspension rod 2, and maintaining the expansion state of the movable arm 3, so as to support and lift the workpiece 7 raised by the sleeper 8. When unlocking is required, an external force can be applied to the suspension rod 2 or the slide 1 to make the suspension rod 2 and the slide 1 slide relative to each other. During the sliding process, the side wall of the suspension rod 2 always presses against the limit member 62, so that the limit member 62 can be disengaged from the limit groove 21 and returned to the locking assembly hole 12, completing the unlocking.

[0035] In order to facilitate the installation of the elastic member 61 and the limit member 62, the locking assembly hole 12 is through-set and has internal threads, and the locking assembly 6 is also provided with a locking bolt 63. The locking bolt 63 is locked into the locking assembly hole 12 and is located at the end of the locking assembly hole 12 away from the suspension rod 2. The elastic member 61 is located between the limit member 62 and the locking bolt 63, and respectively abuts against the limit member 62 and the locking bolt 63. An accommodating hole 631 is provided at the end of the locking bolt 63, which facilitates the elastic member 61 to be partially inserted into the accommodating hole 631. According to the weight of the workpiece 7 to be hoisted, the locking depth of the locking bolt 63 can be adjusted, thereby adjusting the pressure on the elastic member 61, and setting the external force that causes the slide 1 and the suspension rod 2 to slide relative to each other when unlocking, so as to ensure that the locking is stable.

[0036] In addition, a limit seat 22 is fixedly provided on the above-mentioned suspension rod 2. The limit seat 22 is located directly below the slide 1 and is larger than the movable hole 11. It can limit the movable travel of the suspension rod 2 in the movable hole 11 and the degree of retraction and expansion of each movable arm 3. Preferably, when the limit member 62 is located inside the limit groove 21, the top of the limit seat 22 just abuts against the bottom of the slide 1, which can prevent the workpiece 7 from being unlocked due to excessive weight, and also helps to maintain the locked state to ensure stable hoisting.

[0037] In short, the sling has a simple structure, is easy to produce, and is convenient for operation and maintenance. The production cost is also low, which is conducive to mass production. The sling structure is stable and adjustable, and has an automatic locking function. When using the sling, the sling in the retracted state can be directly placed in the workpiece 7, and the slide 1 and the suspension rod 2 can be driven to slide relative to each other by manual or electric means, thereby driving each movable arm 3 to expand to automatic locking. After locking, the hook 31 on each movable arm 3 can support the workpiece 7, and the movable arm 3 can remain in the expanded state. At this time, the operator can stay away from the sling, which is not only more convenient to operate but also greatly reduces the risk factor of lifting. Afterwards, the sling can be lifted to drive the workpiece 7 to rise and move. During the lifting process, the center of gravity of the sling is concentrated on the center of the suspension rod 2 to avoid skew. At the same time, the sling is maintained in a locked state, which can ensure stable lifting and safer lifting. When the workpiece 7 is subsequently put down, it is only necessary to slide the slide 1 and the suspension rod 2 relative to unlock the retracted movable arm 3 of the sling, and the sling can directly take out the workpiece 7, which is convenient to operate.

[0038] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes in form and details of the present invention are within the scope of protection of the present invention without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. An automatic locking sling, characterized in that: include: A slide seat, wherein a movable hole and a locking assembly hole are formed on the slide seat, the movable hole is through-set, and one end of the locking assembly hole is connected to a side wall of the movable hole; A suspension rod, the suspension rod is inserted into the movable hole and movably connected to the slide seat along the axial direction of the movable hole, and a limiting groove is provided on the side wall of the suspension rod; At least two movable arms, the movable arms are arranged along the circumference of the suspension rod, one end of the movable arm is hinged with a first connecting rod, the other end extends to form a hook, and a second connecting rod is arranged between the movable arm and the suspension rod; the first connecting rod is hinged to the slide seat, and the direction of the rotation axis of the hinged movable arm and the slide seat is perpendicular to the axial direction of the movable hole; the hook is located on the side of the movable arm away from the suspension rod; the second connecting rod is hinged to the movable arm and the suspension rod respectively, and the direction of the hinged rotation axis is perpendicular to the axial direction of the movable hole; The locking assembly includes an elastic member and a limiting member, both of which are arranged in the locking assembly hole, the elastic member presses the limiting member and makes the limiting member press against the side wall of the suspension rod, the position and shape of the limiting member correspond to the limiting groove, and can enter and exit the limiting groove as the suspension rod moves.

2. An automatic locking sling according to claim 1, characterized in that: The locking assembly hole is through-set and has internal threads. The locking assembly also includes a locking bolt, which is locked into the locking assembly hole and is located at the end of the locking assembly hole away from the suspension rod. The elastic member is located between the limiting member and the locking bolt, and respectively resists the limiting member and the locking bolt.

3. An automatic locking sling according to claim 2, characterized in that: The end of the locking bolt is provided with a receiving hole, and the elastic member is partially inserted into the receiving hole.

4. An automatic locking sling according to claim 1, characterized in that: The limiting groove is an annular groove arranged around the suspension rod.

5. The automatic locking sling according to claim 1, characterized in that: The cross-sectional profile of the limiting groove is V-shaped or arc-shaped, and the cross-sectional shape of the limiting member is circular or D-shaped.

6. An automatic locking sling according to claim 1, characterized in that: A lifting ring is fixedly provided on the top of the suspension rod, and a pulling ring is fixedly provided on the top of the sliding seat.

7. An automatic locking sling according to claim 1, characterized in that: A limit seat is fixedly arranged on the suspension rod, and the limit seat is located directly below the slide seat. When the limit member is located inside the limit groove, the bottom of the slide seat abuts against the top of the limit seat.

8. An automatic locking sling according to claim 1, characterized in that: The boom is provided with a plurality of fixing seats, which are arranged at intervals along the axial direction of the boom. The second connecting rod is hinged to the boom via the fixing seats. The second connecting rods connected to the same movable arm are arranged at intervals along the axial direction of the boom and are arranged parallel to each other.

9. An automatic locking sling according to claim 1, characterized in that: The bottom end surface position of the suspension rod is lower than the bottom end surface position of the movable arm.

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