Side pulling prevention device for small overhead crane

Abstract

The utility model relates to the field of equipment safety protection, and discloses an anti-side-pulling device for a small crane, which comprises a machine body, the top end of the machine body is fixedly connected with a hoist running car, the front end of the machine body is fixedly connected with a motor, an output shaft of the motor is fixedly connected with a take-up wheel, a steel wire rope is wound on the outer wall of the take-up wheel, and the steel wire rope is fixedly connected with the hoist running car. And one end of the steel wire rope is fixedly connected to the outer wall of the take-up wheel, an anti-side-pulling assembly is arranged outside the machine body, the anti-side-pulling assembly comprises a mounting block, the mounting block is fixedly connected with the left end of the machine body, and a spherical hole is formed in the left end of the mounting block. According to the device, through the arrangement of the motor, the take-up wheel, the steel wire rope, the installation block, the telescopic rod, the second installation ball, the assembly block, the limiting stopper, the wire passing hole and the circular guide ring, the limiting stopper can be accurately started when the deflection angle of the steel wire rope is large in the equipment using process, and the effect of ensuring the safety of the equipment in the using process is achieved.

Description

Technical Field

[0001] The utility model relates to the field of equipment safety protection, in particular to a side-pull prevention device for a small overhead crane. Background Art

[0002] A small overhead crane is a bridge-type lifting equipment with an overhead track. It is mainly used in places such as construction sites or factories for lifting and installing heavy objects. Its load-bearing capacity is generally within a few tons. It has the characteristics of low noise and flexible operation.

[0003] At present, during the use of small overhead cranes, side pulling and oblique pulling may occur due to workers' misoperation, which may cause the wire rope to fall off or jump.

[0004] At present, most existing small overhead cranes use a square hollow object set on the outside of the wire rope as the emergency stop start switch of the equipment. However, in actual use, in order to increase the total lifting amount and stability, the heavy objects are mostly lifted by a movable pulley and two strands of wire rope. When using this method to lift heavy objects, the initial inclination angle of the wire rope may be different when the movable pulley is at different heights. Therefore, a fixed emergency stop start method is used, which may cause the equipment to stop by mistake when the movable pulley is in a higher position, or the emergency stop device still does not start when the wire rope inclination angle is too large after the movable pulley is in a lower position. Therefore, an anti-side pulling device for a small overhead crane is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an anti-side pulling device for a small overhead crane, which aims to improve the problem in the prior art that when two strands of steel wire ropes are needed to lift heavy objects, the initial deflection angle of the steel wire rope may affect the emergency stop start.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a small overhead crane anti-side pulling device, comprising a body, the top of the body is fixedly connected to a gourd sports car, the front end of the body is fixedly connected to a motor, the output shaft of the motor is fixedly connected to a take-up wheel, a steel wire rope is wound around the outer wall of the take-up wheel, and one end of the steel wire rope is fixedly connected to the outer wall of the take-up wheel, an anti-side pulling component is provided on the outside of the body, and the anti-side pulling component includes a mounting block, the other end of the steel wire rope 4 is fixedly connected to the bottom end of the mounting block 51, the mounting block is fixedly connected to the left end of the body, a spherical hole is opened at the left end of the mounting block, the inner wall of the spherical hole contacts with a mounting ball 1, the outer wall of the mounting ball 1 is fixedly connected to a telescopic rod, the outer wall of the telescopic rod is fixedly connected to a limiter, the inner wall of the limiter is opened with a wire through hole, and the bottom end of the limiter outside the wire through hole is fixedly connected with a circular guide ring.

[0007] As a further description of the above technical solution:

[0008] One end of the telescopic rod away from the mounting ball one is fixedly connected with a mounting ball two. An assembly block is arranged outside the mounting ball two. A movable pulley is rotatably connected to the inner wall of the assembly block. The steel wire rope is located below the movable pulley. The bottom end of the assembly block is fixedly connected with a hook.

[0009] As a further description of the above technical solution:

[0010] A wire control assembly is arranged inside the machine body. The wire control assembly includes a mounting groove which is opened on the front inner wall of the machine body. A gear one is fixedly connected to the outer wall of the output shaft of the motor. A gear two is rotatably connected to the inner wall of the mounting groove. A gear three is rotatably connected to the inner wall of the mounting groove. A reciprocating lead screw is fixedly connected to the middle of the rear end of the gear three. A slider is arranged outside the reciprocating lead screw. A wire control block is fixedly connected to the bottom end of the slider. The inner side of the wire control block is slidably connected to the outer wall of the machine body. A wire routing groove is opened in the middle of the wire control block. The steel wire rope is arranged inside the wire routing groove.

[0011] As a further description of the above technical solution:

[0012] The grooves opened on the outer wall of the reciprocating lead screw have the same direction and the distance between adjacent grooves is slightly larger than the diameter of the steel wire rope.

[0013] As a further description of the above technical solution:

[0014] The gear one meshes with the gear two, the gear two meshes with the gear three, and the number of teeth and the size of the gear one are the same as those of the gear three.

[0015] As a further description of the above technical solution:

[0016] The wire control block is semi-circular in shape and is arranged on the right half of the machine body.

[0017] As a further description of the above technical solution:

[0018] The side view of the machine body is concave-shaped, and a semi-circular baffle is arranged on the inner wall of the left half of the machine body.

[0019] As a further description of the above technical solution:

[0020] The circular guide ring is spiral in shape and is arranged outside the steel wire rope.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present utility model, through the settings of the motor, wire take-up wheel, steel wire rope, mounting block, spherical hole, mounting ball one, telescopic rod, mounting ball two, assembly block, movable pulley, stopper, wire passing hole, and circular guide ring, during the use of the device, the stopper and the circular guide ring can offset with the offset angle of the steel wire rope, ensuring that when the swing amplitude of the steel wire rope is relatively large, the stopper can be quickly activated through the circular guide ring, achieving the effect of ensuring the safety during the use of the device.

[0023] 2. In the present utility model, through the settings of the motor, mounting groove, gear one, gear two, gear three, reciprocating lead screw, slider, wire control block, and wire routing groove, it is ensured that when the motor drives the wire take-up wheel to rotate, the reciprocating lead screw can rotate at the same angular velocity, thereby ensuring that the steel wire rope is not easily piled up at the same position during wire take-up and is more smooth during wire release. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structure schematic diagram of the overall structure in the present utility model;

[0025] Figure 2 is a three-dimensional structure sectional schematic diagram of a partial structure of the side pull component in the present utility model;

[0026] Figure 3 in the present utility model Figure 1 is an enlarged three-dimensional structure schematic diagram of part A;

[0027] Figure 4 is a three-dimensional structure schematic diagram of the overall structure in the present utility model;

[0028] Figure 5 is a three-dimensional structure sectional schematic diagram of the machine body in the present utility model.

[0029] LEGEND DESCRIPTION:

[0030] 1. Machine body; 2. Hoist car; 3. Wire take-up wheel; 4. Steel wire rope; 5. Anti-side pull component; 6. Wire control component; 51. Mounting block; 52. Spherical hole; 53. Mounting ball one; 54. Telescopic rod; 55. Mounting ball two; 56. Assembly block; 57. Movable pulley; 58. Stopper; 59. Wire passing hole; 510. Circular guide ring; 61. Mounting groove; 62. Gear one; 63. Gear two; 64. Gear three; 65. Reciprocating lead screw; 66. Slider; 67. Wire control block; 68. Wire routing groove; 7. Motor; 8. Hook. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Referring to Figure 1 With Figure 4 , an embodiment provided by the present invention: an anti-side-pull device for a small overhead crane, including a machine body 1. The side view of the machine body 1 is in an inverted concave shape, and a semi-circular baffle is provided on the inner wall of the left half of the machine body 1. A hoist trolley 2 is fixedly connected to the top of the machine body 1. The hoist trolley 2 is used to connect with an external guide rail and is used to control the horizontal movement of the machine body 1. A motor 7 is fixedly connected to the front end of the machine body 1. The motor 7 is in parallel with the hoist trolley 2. The output shaft of the motor 7 is fixedly connected to a wire reel 3. The wire reel 3 is in a cylindrical shape. A steel wire rope 4 is wound around the outer wall of the wire reel 3, and one end of the steel wire rope 4 is fixedly connected to the outer wall of the wire reel 3.

[0033] Referring to Figure 2 - Figure 4, an anti-side pull component 5 is provided outside the body 1. The anti-side pull component 5 includes a mounting block 51. The shape of the mounting block 51 is set to be arc-shaped, and the inner wall shape of the mounting block 51 fits the outer wall shape of the body 1. The other end of the steel wire rope 4 is fixedly connected to the bottom end of the mounting block 51. The mounting block 51 is fixedly connected to the left end of the body 1. A spherical hole 52 is opened at the left end of the mounting block 51. An installation ball one 53 is in contact with the inner wall of the spherical hole 52. The area of the installation ball one 53 inside the spherical hole 52 exceeds one-half of the total volume. An expansion rod 54 is fixedly connected to the outer wall of the installation ball one 53. The expansion rod 54 is composed of multiple cylindrical hollow long rods. One end of the expansion rod 54 away from the installation ball one 53 is fixedly connected to an installation ball two 55. An assembly block 56 is provided outside the installation ball two 55. A hole whose shape fits the installation ball two 55 is opened on the outer wall of the assembly block 56, and the area of the installation ball two 55 arranged inside the assembly block 56 exceeds one-half of the total volume of the installation ball two 55. A movable pulley 57 is rotatably connected to the inner wall of the assembly block 56. The shape of the movable pulley 57 is cylindrical, and an annular groove with an inner and outer diameter difference greater than the diameter of the steel wire rope 4 is opened in the middle of the movable pulley 57. The steel wire rope 4 is located below the movable pulley 57. A hook 8 is fixedly connected to the bottom end of the assembly block 56. A stopper 58 is fixedly connected to the outer wall of the expansion rod 54. The stopper 58 is arranged outside the outermost cylindrical hollow rod of the expansion rod 54. Through the position setting of the stopper 58, it is ensured that the expansion rod 54 will not affect the stopper 58 during the expansion and contraction process. The stopper 58 is arranged on the main road of the hoist carriage 2 and the motor 7. The stopper 58 can make the hoist carriage 2 and the motor 7 stop suddenly, and the stopper 58 is a prior art and can be realized by those skilled in the art, so it will not be described in detail in this case. A wire passing hole 59 is opened in the inner wall of the stopper 58. The steel wire rope 4 passes through the wire passing hole 59. A circular guide ring 510 is fixedly connected to the bottom end of the stopper 58 outside the wire passing hole 59. The circular guide ring 510 is the start switch of the stopper 58. When the steel wire rope 4 contacts the circular guide ring 510, the stopper 58 is started. The shape of the circular guide ring 510 is spiral, and the circular guide ring 510 is arranged outside the steel wire rope 4.

[0034] Refer to Figure 1 , Figure 4 And Figure 5, a wire control assembly 6 is arranged inside the machine body 1. The wire control assembly 6 includes an installation groove 61 which is opened on the front inner wall of the machine body 1. A first gear 62 is fixedly connected to the outer wall of the output shaft of the motor 7. A hole matching the size of the output shaft of the motor 7 is opened in the middle of the first gear 62. A second gear 63 is rotatably connected to the inner wall of the installation groove 61, and a third gear 64 is rotatably connected to the inner wall of the installation groove 61. The first gear 62 meshes with the second gear 63, and the second gear 63 meshes with the third gear 64. The number of teeth and the size of the first gear 62 are the same as those of the third gear 64. Through the size setting of the first gear 62 and the third gear 64, it is ensured that the first gear 62 and the third gear 64 can rotate at the same angular velocity simultaneously. A reciprocating lead screw 65 is fixedly connected to the middle of the rear end of the third gear 64. The distance between adjacent grooves opened in the same direction on the outer wall of the reciprocating lead screw 65 is slightly larger than the diameter of the wire rope 4. Through the spacing setting of the outer grooves of the reciprocating lead screw 65, it is ensured that the wire rope 4 is not easily stacked during the winding process. A slider 66 is arranged outside the reciprocating lead screw 65. A wire control block 67 is fixedly connected to the bottom end of the slider 66. The shape of the wire control block 67 is semi-circular, and the wire control block 67 is arranged in the right half of the machine body 1. Through the setting of the wire control block 67, it is ensured that the position of the end of the wire rope 4 far from the mounting block 51 is always in the right half of the equipment. The inner side of the wire control block 67 is slidably connected to the outer wall of the machine body 1. A wire routing groove �8 is opened in the middle of the wire control block 67, and the wire rope 4 is arranged inside the wire routing groove 68.

[0035] Working principle: When in use, when the staff takes in the wire, as the length of the wire rope 4 outside becomes shorter, the midpoint position of the wire rope 4 outside rises, thereby driving the movable pulley 57 to move upward. After the movable pulley 57 moves upward, the assembly block 56 moves upward along with the movable pulley 57. Thus, when the assembly block 56 moves upward, it pushes the bottom end of the telescopic rod 54, causing the telescopic rod 54 to shorten.

[0036] At the same time, during the upward movement of the assembly block 56, the clamping between the telescopic rod 54 and the mounting block 51 changes, thereby driving the deflection angle of the limiter 58 to change. And the wire rope 4 is pulled by the combined gravity of the movable pulley 57, the assembly block 56, the hook 8 and the object lifted by the hook 8. Therefore, the wire rope 4 is in a taut state. Therefore, the area of the wire rope 4 between the mounting block 51 and the bottom end of the movable pulley 57 is approximately horizontal. And as the movable pulley 57 rises, the included angle between the wire rope 4 and the mounting block 51 and the included angle between the telescopic rod 54 and the mounting block 51 change synchronously. Therefore, when the deflection angle of the limiter 58 changes, the included angle between the wire passing hole 59 and the wire rope 4 hardly changes.

[0037] Therefore, during the use process, it can be ensured that when the movable pulley 57, the assembly block 56 and the hook 8 are at different heights, the circular guide ring 510 is always at the same or approximately the same angle as the wire rope 4 and is located outside the wire rope 4. Therefore, when the wire rope 4 is at different lengths and the deflection angle is too large, after the wire rope 4 contacts the circular guide ring 510, the stopper 58 can be started more accurately, so that the motor 7 and the hoist carriage 2 stop running, enabling the device to stop suddenly better and ensuring safety during the use process.

[0038] Meanwhile, during wire winding and unwinding, when the motor 7 drives the wire winding wheel 3 to rotate, the first gear 62 is driven to rotate simultaneously, and the second gear 63 is driven to rotate by the first gear 62. As a result, the second gear 63 drives the third gear 64 to rotate, and the third gear 64 drives the reciprocating lead screw 65 to rotate. Thus, the reciprocating lead screw 65 can rotate simultaneously with the wire winding wheel 3 in the same direction and at the same angular velocity, and the slider 66 is driven to slide back and forth by the reciprocating lead screw 65. Therefore, during wire winding and unwinding, the wire rope 4 can be driven to move back and forth by the wire control block 67, preventing the wire rope 4 from accumulating at the same position during wire winding.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An anti-side-pull device for a small overhead crane, comprising a body (1), characterized in that: A hoist sports car (2) is fixedly connected to the top of the body (1). A motor (7) is fixedly connected to the front end of the body (1). A wire reel (3) is fixedly connected to the output shaft of the motor (7). A steel wire rope (4) is wound around the outer wall of the wire reel (3), and one end of the steel wire rope (4) is fixedly connected to the outer wall of the wire reel (3). An anti-side pull assembly (5) is arranged outside the body (1). The anti-side pull assembly (5) includes a mounting block (51). The mounting block (51) is fixedly connected to the left end of the body (1). The other end of the steel wire rope (4) is fixedly connected to the bottom end of the mounting block (51). A spherical hole (52) is opened at the left end of the mounting block (51). An installation ball one (53) is in contact with the inner wall of the spherical hole (52). An expansion rod (54) is fixedly connected to the outer wall of the installation ball one (53). A limiter (58) is fixedly connected to the outer wall of the expansion rod (54). A wire passing hole (59) is opened in the inner wall of the limiter (58). A circular guide ring (510) is fixedly connected to the bottom end of the limiter (58) outside the wire passing hole (59).

2. The anti-side-pulling device for a small overhead crane according to claim 1, characterized in that: One end of the expansion rod (54) far from the installation ball one (53) is fixedly connected to an installation ball two (55). An assembly block (56) is arranged outside the installation ball two (55). A movable pulley (57) is rotatably connected to the inner wall of the assembly block (56). The steel wire rope (4) is below the movable pulley (57). A hook (8) is fixedly connected to the bottom end of the assembly block (56).

3. The anti-side-pulling device for a small overhead crane according to claim 1, characterized in that: A wire control assembly (6) is arranged inside the body (1). The wire control assembly (6) includes an installation groove (61). The installation groove (61) is opened on the inner wall of the front end of the body (1). A gear one (62) is fixedly connected to the outer wall of the output shaft of the motor (7). A gear two (63) is rotatably connected to the inner wall of the installation groove (61). A gear three (64) is rotatably connected to the inner wall of the installation groove (61). A reciprocating lead screw (65) is fixedly connected to the middle of the rear end of the gear three (64). A slider (66) is arranged outside the reciprocating lead screw (65). A wire control block (67) is fixedly connected to the bottom end of the slider (66). The inner side of the wire control block (67) is slidably connected to the outer wall of the body (1). A wire passing groove (68) is opened in the middle of the wire control block (67). The steel wire rope (4) is arranged inside the wire passing groove (68).

4. The anti-side-pull device for a small overhead crane according to claim 3, characterized in that: The distance between adjacent grooves opened in the same direction on the outer wall of the reciprocating lead screw (65) is slightly larger than the diameter of the steel wire rope (4).

5. The anti-side-pull device for a small overhead crane according to claim 3, characterized in that: The gear one (62) is meshed with the gear two (63). The gear two (63) is meshed with the gear three (64). The number of teeth and the size of the gear one (62) are the same as those of the gear three (64).

6. The anti-side-pulling device for a small overhead crane according to claim 3, characterized in that: The shape of the wire control block (67) is semi-circular, and the wire control block (67) is arranged in the right half part of the body (1).

7. The anti-side-pulling device for a small overhead crane according to claim 1, wherein: The side view shape of the body (1) is an inverted concave shape, and a semi-circular baffle is arranged on the inner wall of the left half part of the body (1).

8. The anti-side-pulling device for a small overhead crane according to claim 1, characterized in that: The shape of the circular guide ring (510) is spiral, and the circular guide ring (510) is arranged outside the wire rope (4).

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