Novel universal pulley

Abstract

The utility model discloses a novel universal pulley, which belongs to the technical field of pulleys and comprises a connecting frame, and a hook is movably mounted at the top of the connecting frame. A ball body with the two ends connected to the two sides of the connecting frame respectively is installed at the bottom of the connecting frame, a rotating ring is installed on the ball body, and the transverse width of the rotating ring is larger than the radius of the ball body. A ball groove is formed in the inner side of the middle of the rotating ring in the circumferential direction of the rotating ring, and a plurality of balls are placed in the ball groove; a rope groove is formed in the outer side of the middle of the rotating ring in the circumferential direction of the rotating ring. According to the novel universal pulley, the rotating direction of the pulley can be kept consistent with the stress direction of a rope as far as possible, the friction force between the rope and the pulley can be effectively reduced, the rope can be effectively prevented from being separated from the pulley, and the construction safety can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pulleys, in particular to a new type of universal pulley. Background Art

[0002] A pulley is a simple machine used to lift heavy objects and save effort. Existing pulleys are generally small wheels with grooves on the periphery that can rotate around an axis, consisting of a disc with grooves that can rotate around the central axis and a flexible cable (rope, tape, steel cable, chain, etc.) that crosses the disc, and can rotate around the central axis for simple mechanical operations.

[0003] Existing fixed pulleys generally rotate on a single axis, and only the rotation between the hook and the housing can change the direction. However, in actual use, the steel wire rope inevitably exerts a side force, resulting in an eccentric frictional force between the steel wire rope and the fixed pulley, which is not conducive to construction safety. Summary of the Invention

[0004] The purpose of the utility model is to provide a new type of universal pulley, which can make the rotation direction of the pulley as consistent as possible with the force direction of the rope, can effectively reduce the frictional force between the rope and the pulley, and can also effectively prevent the rope from detaching from the pulley, which is beneficial to improving construction safety.

[0005] To achieve the above purpose, the utility model provides a new type of universal pulley, including a connecting frame, and a hook is movably installed at the top of the connecting frame; a sphere with both ends respectively connected to both sides of the connecting frame is installed at the bottom of the connecting frame, a swivel ring is installed on the sphere, and the transverse width of the swivel ring is greater than the radius of the sphere; a ball groove is circumferentially formed on the inner side of the middle part of the swivel ring along the circumference of the swivel ring, and a number of balls are placed in the ball groove; a rope groove is circumferentially formed on the outer side of the middle part of the swivel ring along the circumference of the swivel ring.

[0006] Preferably, the swivel ring includes a first swivel ring block and a second swivel ring block, and threaded holes are correspondingly formed on the first swivel ring block and the second swivel ring block and are connected and fixed by fixing bolts.

[0007] Preferably, the ball groove and the rope groove are respectively located on the inner and outer sides of the connection between the first swivel ring block and the second swivel ring block.

[0008] Preferably, the depth of the ball groove is less than the diameter of the ball.

[0009] Preferably, sealing heads are provided on both sides of the bottom of the connecting frame, internal bearings are provided in the sealing heads, and shaft rods corresponding to the internal bearings are provided on both sides of the sphere.

[0010] Preferably, the shaft rod penetrates through the sphere.

[0011] Preferably, inclined bearings are installed on the outer side of the head near one end of the sphere.

[0012] Therefore, by adopting the above-mentioned novel universal pulley, the rotation direction of the pulley can be made to be as consistent as possible with the force direction of the rope, which can effectively reduce the friction between the rope and the pulley, and can also effectively prevent the rope from disengaging from the pulley, being beneficial to improving construction safety.

[0013] The technical solution of the present invention will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0014] Figure 1 is a schematic structural view of an embodiment of a novel universal pulley of the present invention;

[0015] Figure 2 is a schematic internal structure view of an embodiment of a novel universal pulley of the present invention;

[0016] Figure 3 is a schematic cross-sectional view of a swivel of an embodiment of a novel universal pulley of the present invention.

[0017] Reference Signs

[0018] 1, hook; 2, connecting frame; 3, sphere; 4, swivel; 41, first swivel block; 42, second swivel block; 43, rope groove; 44, threaded hole; 45, ball groove; 5, head; 6, internal bearing; 7, shaft rod; 8, ball; 9, inclined bearing. Detailed Embodiments

[0019] The technical solution of the present invention will be further described below through the drawings and embodiments.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before the term cover the elements or objects listed after the term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] Embodiment 1

[0022] As shown Figure 1 in the figure, the present utility model provides a new type of universal pulley, including a connecting frame 2. A hook 1 is movably installed at the top of the connecting frame 2. The hook 1 can rotate on the top of the connecting frame 2. During the use of the pulley, the direction of the connecting frame 2 can be appropriately adjusted according to the acting force direction of the rope, which is beneficial to reducing the friction between the rope and the pulley.

[0023] Sealing heads 5 are arranged on both sides of the bottom of the connecting frame 2. In this embodiment, bolts are used to fix the sealing heads 5 on the inner side of the bottom of the connecting frame 2. Other methods can also be used to fix the sealing heads 5, which are all prior arts and will not be elaborated here. As Figure 2 shown in the figure, a sphere 3 is fixed between the two sealing heads 5. The sealing heads 5 at both ends are in close fit with the sphere 3. Internal bearings 6 are arranged in the sealing heads 5. A shaft rod 7 that penetrates the sphere 3 and corresponds to the internal bearing 6 is arranged in the middle of the sphere 3, which can effectively reduce the friction during the rotation of the sphere 3.

[0024] A swivel ring 4 is installed on the sphere 3. A ball groove 45 is circumferentially formed on the inner side of the middle of the swivel ring 4 along the circumferential direction of the swivel ring 4. As Figure 3 shown in the figure, a rope groove 43 is circumferentially formed on the outer side of the middle of the swivel ring 4 along the circumferential direction of the swivel ring 4 for limiting the rope. A number of balls 8 are placed in the ball groove 45. The depth of the ball groove 45 is less than the diameter of the balls 8, which can ensure that the swivel ring 4 can rotate smoothly on the sphere 3. During the use of the pulley, the position of the swivel ring 4 on the sphere 3 can be automatically adjusted according to the force direction of the rope, so as to ensure that the rotation direction of the swivel ring 4 is as consistent as possible with the force direction of the rope, which can further reduce the friction between the rope and the pulley during the use of the pulley, and is also beneficial to improving the construction safety and preventing the rope from easily falling off the pulley.

[0025] The inner wall of the swivel ring 4 has the same curvature as the outer wall of the sphere 3 and the transverse width of the swivel ring 4 is not less than the radius of the sphere 3, which can effectively prevent the swivel ring 4 from detaching from the sphere 3. Among them, the swivel ring 4 includes a first swivel ring block 41 and a second swivel ring block 42. The ball groove 45 and the rope groove 43 are respectively located on the inner and outer sides of the connection between the first swivel ring block 41 and the second swivel ring block 42. Threaded holes 44 are correspondingly formed on the first swivel ring block 41 and the second swivel ring block 42 and are connected and fixed by fixing bolts, which is convenient for smoothly installing the swivel ring 4 on the sphere 3. Oblique bearings 9 are installed at one end of the outer side of the sealing head 5 close to the sphere 3, which can limit the swivel ring 4 when the inclination angle of the swivel ring 4 is large, and can also avoid friction between the swivel ring 4 and the sealing head 5, which is beneficial to the smooth rotation of the swivel ring 4.

[0026] Therefore, by adopting the above-mentioned novel universal pulley, the rotation direction of the pulley can be made to be as consistent as possible with the force direction of the rope, which can effectively reduce the friction between the rope and the pulley, and can also effectively prevent the rope from disengaging from the pulley, thus being beneficial to improving construction safety.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A new universal pulley, characterized in that: It includes a connecting frame, a hook is movably installed on the top of the connecting frame; a sphere is installed at the bottom of the connecting frame, and its two ends are respectively connected to the two sides of the connecting frame, and a swivel is installed on the sphere, and the lateral width of the swivel is greater than the radius of the sphere; a ball groove is opened on the inner side of the middle part of the swivel along the circumference of the swivel, and a plurality of balls are placed in the ball groove; a rope groove is opened on the outer side of the middle part of the swivel along the circumference of the swivel.

2. A novel universal pulley according to claim 1, characterized in that: The swivel includes a first swivel block and a second swivel block. The first swivel block and the second swivel block are correspondingly provided with threaded holes and are connected and fixed by fixing bolts.

3. A novel universal pulley according to claim 2, characterized in that: The ball groove and the rope groove are respectively located at the inner and outer sides of the connection between the first swivel block and the second swivel block.

4. The novel universal pulley according to claim 1 is characterized in that: The depth of the ball groove is smaller than the diameter of the ball.

5. The novel universal pulley according to claim 1 is characterized in that: Both sides of the bottom of the connecting frame are provided with heads, and internal bearings are provided in the heads. Both sides of the sphere are provided with shaft rods corresponding to the internal bearings.

6. A novel universal pulley according to claim 5, characterized in that: The shaft passes through the sphere.

7. The novel universal pulley according to claim 5 is characterized in that: An oblique bearing is installed on the outer side of the sealing head close to one end of the sphere.

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