Hand wheel of non-light-load lever block

Abstract

The utility model discloses a hand wheel of a non-light-load lever block, and relates to the technical field of lever blocks. Comprising a hand wheel and a long shaft, the long shaft is sequentially sleeved with a gear cover, a first machine shell, a hoisting chain wheel, a second machine shell, a first friction plate, a ratchet wheel, a second friction plate and a brake base from inside to outside, a pawl is fixed to the second machine shell and connected with the ratchet wheel in a clamped mode, and the center of the hand wheel is fixedly connected with the long shaft; a first friction plate and a second friction plate are fixedly attached to the two side faces of the ratchet wheel respectively, and the second friction plate is attached to the end face of the brake base. A spline is arranged on the circumferential wall of the long shaft in a protruding mode, a spline groove is formed in the inner circumferential wall of the brake base in a concave mode, and the spline is embedded into the spline groove to form clamping and fixed connection. According to the hand wheel of the non-light-load lever block with the structure, the problems that when a traditional lever block is in light load, a hand wheel idles, operation is not smooth, the structure is complex, and maintenance is inconvenient are solved.

Description

Technical Field

[0001] This utility model relates to the field of handwheel hoist technology, and in particular to a handwheel for a non-light-load handwheel hoist. Background Technology

[0002] Hand-operated lever hoists are a common lifting tool widely used in construction, machinery maintenance, and other fields. However, traditional hand-operated lever hoists are prone to problems such as handwheel spin-off and operational difficulties under light loads, which not only affect work efficiency but also pose potential safety hazards. For example, in situations requiring high lifting precision, handwheel instability under light loads can make it difficult to accurately position the load; furthermore, handwheel spin-off can lead to operator misjudgment and potentially cause accidents. Additionally, the handwheel structure of existing lever hoists is relatively complex, requiring significant time and manpower for maintenance and upkeep, which is detrimental to practical production use. Utility Model Content

[0003] The purpose of this utility model is to provide a handwheel for a light-load handwheel hoist, so as to solve the problems mentioned in the background art, such as the handwheel spinning freely under light load, the operation not being smooth, and the complex structure and inconvenient maintenance of traditional handwheel hoists.

[0004] To achieve the above objectives, this utility model provides a handwheel for a non-light-load handwheel hoist, comprising a handwheel and a long shaft. The long shaft is sequentially fitted with a gear cover, a first housing, a lifting sprocket, a second housing, a first friction plate, a ratchet, a second friction plate, and a brake seat from the inside to the outside. A pawl is fixed on the second housing, and the pawl engages with the ratchet. The center of the handwheel is fixedly connected to the long shaft.

[0005] Preferably, a first friction plate and a second friction plate are fixedly attached to both sides of the ratchet, with the second friction plate abutting against the end face of the brake seat.

[0006] Preferably, a spline is protruding on the peripheral wall of the long shaft, and a spline groove is recessed on the inner peripheral wall of the brake seat, with the spline embedded in the spline groove to form a snap-fit ​​connection.

[0007] Preferably, the handwheel has a groove inside, and two balls are provided in the groove, each located symmetrically about the long axis.

[0008] Preferably, there are two grooves, each located symmetrically about the long axis, and a spring is provided inside the handwheel, the spring being concentric with the long axis.

[0009] The beneficial effects of this utility model are as follows:

[0010] (1) By optimizing the connection between the handwheel and the internal braking mechanism, it is ensured that the friction plate and the brake seat always maintain close contact under no-load or light-load conditions, so as to prevent the handwheel from rotating on its own.

[0011] (2) It avoids the braking failure problem of traditional hand-operated hoists under light load conditions, thus improving the safety of use;

[0012] (3) The handwheel can be rotated at a certain angle to release the power, making the operation simple and convenient;

[0013] (4) The mechanical structure with ball bearings and grooves is durable and has low maintenance cost.

[0014] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural schematic diagram of the handwheel embodiment of a non-light-load handwheel hoist according to the present invention.

[0016] Among them, 1. Gear cover; 2. First housing; 3. Second housing; 4. Pad; 5. Brake seat; 6. Groove; 7. Handwheel; 8. Spring; 9. Ball bearing; 10. Second friction plate; 11. Ratchet; 12. First friction plate; 13. Lifting sprocket; 14. Long shaft. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0018] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Example

[0020] like Figure 1As shown, a handwheel 7 of a non-light-load handwheel hoist includes a handwheel 7 and a long shaft 14. The long shaft 14 is sequentially fitted with a gear cover 1, a first housing 2, a lifting sprocket 13, a second housing 3, a first friction plate 12, a ratchet 11, a second friction plate 10, and a brake seat 5 from the inside to the outside. A pawl 4 is fixed on the second housing 3 and engages with the ratchet 11. The core of the handwheel 7 is fixedly connected to the long shaft 14 to ensure that the core and the long shaft 14 can rotate synchronously when the handwheel 7 rotates. This design avoids direct linkage between the handwheel 7 and the internal mechanism and reduces the risk of brake failure caused by the rotation of the handwheel 7.

[0021] A first friction plate 12 and a second friction plate 10 are fixedly attached to the two sides of the ratchet 11, respectively. The second friction plate 10 is attached to the end face of the brake seat 5. A spline is protruding on the peripheral wall of the long shaft 14, and a spline groove is recessed on the inner peripheral wall of the brake seat 5. The spline is embedded in the spline groove to form a snap-fit ​​connection.

[0022] The handwheel 7 has a groove 6 inside, and there are two balls 9 inside the groove 6, which are respectively located symmetrically with respect to the long axis 14. There are two grooves 6 inside, which are respectively located symmetrically with respect to the long axis 14. The handwheel 7 has a spring 8 inside, which is concentric with the long axis 14.

[0023] Working principle: Under normal conditions, when the handwheel 7 is not rotating or the rotation angle is small, the ball 9 is located at the bottom of the groove 6, and the friction plate is in close contact with the brake seat 5, forming an integral structure to ensure use under no light load conditions; in the release state, when the handwheel 7 is rotated to the right by a certain angle (e.g., 30°), the inclined surface of the groove 6 pushes the ball 9 to move outward, and the movement of the ball 9 causes the brake seat 5 to separate from the second friction plate 10, thereby achieving the release effect; in the reset state, when the handwheel 7 stops rotating or rotates in the opposite direction, the ball 9 returns to the bottom of the groove 6, and the second friction plate 10 and the brake seat 5 are in close contact again, restoring the no light load condition.

[0024] Therefore, this utility model adopts the above-mentioned structure for the handwheel of a light-load handwheel hoist, which solves the problems of handwheel free-running, unsmooth operation, and complex structure and inconvenient maintenance of traditional handwheel hoists under light load.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A handwheel for a non-light-load handwheel hoist, characterized in that: It includes a handwheel and a long shaft. The long shaft is sequentially fitted with a gear cover, a first housing, a lifting sprocket, a second housing, a first friction plate, a ratchet, a second friction plate, and a brake seat from the inside to the outside. A pawl is fixed on the second housing and engages with the ratchet. The center of the handwheel is fixedly connected to the long shaft.

2. The handwheel of a non-light-load handwheel hoist according to claim 1, characterized in that: A first friction plate and a second friction plate are fixedly attached to both sides of the ratchet, with the second friction plate abutting against the end face of the brake seat.

3. The handwheel of a non-light-load handwheel hoist according to claim 2, characterized in that: The long shaft has a spline protruding on its peripheral wall, and the brake seat has a spline groove recessed on its inner peripheral wall. The spline is embedded in the spline groove to form a snap-fit ​​connection.

4. The handwheel of a non-light-load handwheel hoist according to claim 3, characterized in that: The handwheel has a groove inside, and there are two balls inside the groove, which are respectively located symmetrically about the long axis.

5. The handwheel of a non-light-load handwheel hoist according to claim 4, characterized in that: Two grooves are provided, each located symmetrically about the long axis. A spring is provided inside the handwheel, and the spring is concentric with the long axis.

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