WO2024229992A1

WO2024229992A1 - Holding type winch clutch mechanism

Info

Publication number: WO2024229992A1
Application number: PCT/CN2023/111115
Authority: WO
Inventors: 张俊强
Original assignee: 湖南九虎智能科技有限公司
Priority date: 2023-05-08
Filing date: 2023-08-03
Publication date: 2024-11-14

Abstract

Disclosed in the present invention is a holding type winch clutch mechanism, comprising a brake shoe, a driving disc and a driving mechanism, wherein a brake pad is installed on an inner surface of the brake shoe, brake lugs are installed at two ends of the brake shoe, one brake lug is hinged to the driving disc, the other brake lug is hinged to a gear, an inner ring gear is arranged in the driving disc, the gear is meshed with the inner ring gear, the driving mechanism drives the brake shoe to be tightly held and opened, a forward rotation direction of the driving disc is opposite to a holding direction of the brake shoe, and the forward rotation direction of the driving disc is the same as an opening direction of the brake shoe. In the present invention, an attaching degree of the brake pad and a brake drum is high, a friction area is increased, stress of the brake shoe is balanced, abrasion of the brake pad is reduced, and the holding tension is small, thereby avoiding fatigue fracture of the brake shoe and achieving long service life and high safety, reliability and sensitivity.

Description

A kind of winch clutch mechanism

Technical Field

The present invention relates to the field of machinery, and in particular to a winch clutch mechanism.

Background Art

The existing winch clutch mechanism includes an active disc, a brake shoe, and a driving mechanism; a brake shoe is installed on the brake shoe, the brake shoe wraps the brake drum, and the driving mechanism drives the brake shoe to clamp and open. When the brake shoe clamps the brake drum, the power of the active disc is transmitted to the brake drum, that is, the engaged state. When the brake shoe opens, the brake shoe is separated from the brake drum, and the power of the active disc cannot be transmitted to the brake drum, that is, the separated state. The two ends of the brake shoe are a fixed end and a movable end, respectively, and the driving mechanism drives the movable end to move, so that the brake shoe clamps and opens. The brake shoe is repeatedly and continuously clamped and opened in a cycle and deformed, the fit between the brake shoe and the brake drum is poor, the clamping tension is large, the brake shoe is unevenly stressed, and the brake shoe is seriously worn. Under the repeated and continuous large tensile and impact stress, the brake shoe is severely fractured due to fatigue, and the service life is short, which often causes serious accidents. In addition, due to the large deformation of the brake shoe and the large clamping tension, the existing winch clutch mechanism has a long response time from the clamping state to the opening state, and the sensitivity of the winch clutch mechanism is poor.

Summary of the invention

In view of this, the present invention proposes a winch clutch mechanism, which has a high fit between the brake pad and the brake drum, an increased friction area, balanced force on the brake shoe, reduced wear of the brake pad, low clamping tension, avoidance of brake shoe fatigue fracture, a long service life, and high safety, reliability and sensitivity.

On the one hand, the present invention provides a winch clutch mechanism, including a brake shoe, an active disk and a driving mechanism, a brake pad is installed on the inner surface of the brake shoe, brake ears are installed on both ends of the brake shoe, one brake ear is hinged to the active disk, and the other brake ear is hinged to the gear, an inner gear ring is arranged in the active disk, the gear is meshed with the inner gear ring, and the driving mechanism drives the brake shoe to clamp and open, the forward rotation direction of the active disk is opposite to the clamping direction of the brake shoe, and the forward rotation direction of the active disk is the same as the opening direction of the brake shoe.

In a further technical solution, the driving mechanism includes a clutch cylinder, a pulling arm is connected to the gear, and two ends of the clutch cylinder are respectively hinged to the driving disk and the pulling arm.

In a further technical solution, a return spring is installed in the rod chamber of the clutch oil cylinder, and the return spring retracts the piston rod of the clutch oil cylinder, driving the brake shoe to open.

In a further technical solution, a connecting rod and a locking nut are installed on the piston rod of the clutch cylinder, the connecting rod is threadedly connected to the piston rod, the locking nut locks the connecting rod, and the connecting rod is hinged to the pulling arm.

In a further technical solution, two brake shoes and two driving mechanisms are included, two supporting pin holes are opened on the active disk, the two supporting pin holes are symmetrically arranged, one brake ear of each brake shoe is connected to the supporting pin hole of the active disk through a supporting pin; the central angle R1 of each brake shoe is less than 180 degrees; the central angle R1 of each brake shoe is the same, and the two brake shoes have the same clamping direction.

In a further technical solution, three brake shoes and three driving mechanisms are included, three supporting pin holes are opened on the active disk, and the three supporting pin holes are symmetrically arranged; one of the brake ears of each brake shoe is connected to the supporting pin hole of the active disk through a supporting pin; the central angle R1 of each brake shoe is less than 120 degrees; the central angle R1 of each brake shoe is the same, and the three brake shoes have the same clamping direction.

In a further technical solution, the inner gear ring is cocentric with the driving disc.

Compared with the prior art, the hoisting machine clutch mechanism of the present invention has the following beneficial effects:

1. Since an inner gear ring is arranged inside the driving plate, the gear meshes with the inner gear ring, the driving mechanism drives the brake shoe to clamp and open, and the movable end of the brake shoe moves along the inner gear ring. The center of the moving trajectory of the movable end of the brake shoe is the center of the inner gear ring. The inner gear ring is concentric with the driving plate, that is, the moving trajectory of the movable end of the brake shoe is concentric with the brake shoe, so that the brake pad and the brake drum have a high degree of fit, the friction area is increased, the brake shoe is balanced, the wear of the brake pad is reduced, the clamping tension is small, the fatigue fracture of the brake shoe is avoided, the service life is long, and the safety, reliability and sensitivity are high.

2. Since the brake shoe is composed of two brake shoes or three brake shoes or less than two brake shoes, each brake shoe is equipped with a driving mechanism, and each driving mechanism drives each brake shoe to clamp and open. The central angle R1 of each brake shoe is small, so that the brake pad and the brake drum have a high fit, the friction area is increased, the brake shoe is subjected to balanced force, the wear of the brake pad is reduced, the clamping tension is small, and the brake shoe fatigue fracture is avoided. The service life is long, and the safety, reliability and sensitivity are high.

3. The positive rotation direction of the active disk of the present invention refers to the rotation direction of the active disk when the winch wire rope rises, that is, the rotation direction of the active disk when the brake shoe is tightened. Since all brake shoes are tightened in the same direction, the positive rotation direction of the active disk is opposite to the brake shoe tightening direction, which increases the force of the brake shoe tightening the brake drum.

4. Since the pull arm is connected to the gear, the clutch oil cylinder drives the pull arm to make the gear roll on the inner gear ring. This technical solution uses the lever principle. Under the same clutch oil cylinder force, the longer the pull arm, the longer the clutch oil cylinder force arm, the greater the brake shoe clamping tension and return tension. Under the condition of meeting the clamping tension and return tension, the smaller the clutch oil cylinder force is required, the smaller the return force of the return spring is required. The clutch mechanism has a short response time, high safety, reliability and sensitivity.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

FIG1 is a schematic structural diagram of a hoisting clutch mechanism according to a first embodiment of the present invention;

FIG2 is a schematic diagram of the active disk structure of FIG1 ;

FIG3 is a schematic diagram of the brake shoe and drive mechanism structure of FIG1 ;

4 is a schematic structural diagram of a hoisting clutch mechanism according to a second embodiment of the present invention;

FIG5 is a schematic diagram of the active disk structure of FIG4;

FIG. 6 is a schematic structural diagram of the brake shoe and driving mechanism of FIG. 4 .

Implementation

It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

The forward rotation direction of the active disk 1 described in the present invention refers to the rotation direction of the active disk 1 when the winch wire rope rises, that is, the rotation direction of the active disk 1 when the brake shoe 2 is tightly clamped.

The center angle R1 of the brake shoe 2 refers to the center angle formed by the brake shoe 2 wrapping around the brake drum, that is, the center angle R1 enclosed by the two brake ears 21.

A hinged joint refers to a connection in which two components are connected by a pin, and the two components can rotate relative to each other without transmitting torque.

As shown in Fig. 1, Fig. 2 and Fig. 3, the present invention provides a first embodiment of a winch clutch mechanism, comprising two brake shoes 2, a driving disc 1 and two driving mechanisms 3, the two brake shoes 2 enveloping a brake drum (not shown in the figure), and the central angle R1 of each brake shoe 2 is 157 degrees. The two brake shoes 2 have the same clamping direction, the positive rotation direction of the driving disc 1 is opposite to the clamping direction of the brake shoes 2, and the positive rotation direction of the driving disc 1 is the same as the opening direction of the brake shoes 2.

The present invention divides the existing brake shoe into two sections of brake shoes 2, so that the central angle of each brake shoe 2 is less than 180 degrees. Since all brake shoes 2 have the same clamping direction, the positive rotation direction of the active disc 1 is opposite to the clamping direction of the brake shoe 2, so that the force of the brake shoe 2 clamping the brake drum is increased. Since the central angle R1 of each brake shoe 2 is small, the fit between the brake pad 20 and the brake drum is high, the friction area is increased, the force of the brake shoe 2 is balanced, the wear of the brake pad 20 is reduced, the clamping tension is small, the fatigue fracture of the brake shoe 2 is avoided, the service life is long, and the safety, reliability and sensitivity are high. If one brake shoe 2 breaks and fails, the other brake shoe 2 can continue to be used.

As shown in FIG. 2 , two supporting pin holes 11 are provided on the driving disc 1 , and the two supporting pin holes 11 are symmetrically arranged. One brake ear 21 of each brake shoe 2 is connected to the supporting pin hole 11 of the driving disc 1 through a supporting pin.

As shown in FIG3 , a brake pad 20 is installed on the inner surface of the brake shoe 2, and brake ears 21 are installed at both ends of the brake shoe 2, one of the brake ears 21 is hinged to the active disc 1, and the other brake ear 21 is hinged to the gear 22. An inner gear ring 10 is arranged in the active disc 1, and the inner gear ring 10 is coaxial with the active disc 1. The gear 22 is meshed with the inner gear ring 10, and each driving mechanism 3 drives each brake shoe 2 to clamp and open. Each driving mechanism 3 includes a clutch cylinder 30, and a pull arm 23 is connected to the gear 22. The two ends of the clutch cylinder 30 are respectively hinged to the active disc 1 and the pull arm 23. Under the condition that the force of the clutch cylinder 30 is the same, the longer the pull arm 23 is, the longer the force arm of the clutch cylinder 30 is, and the greater the clamping tension and return tension of the brake shoe 2 are. Under the condition that the clamping tension and return tension are met, the smaller the force of the clutch cylinder 30 is required, and the smaller the return force of the return spring 31 is required. The clutch mechanism has a short response time and high sensitivity.

Since the inner gear ring 10 is provided in the active disc 1, the gear 22 meshes with the inner gear ring 10, the driving mechanism 3 drives the brake shoe 2 to clamp and open, and the movable end of the brake shoe 2 moves along the inner gear ring 10. The center of the moving trajectory of the movable end of the brake shoe 2 is the center of the inner gear ring 2. The inner gear ring 2 is concentric with the active disc 1, that is, the moving trajectory of the movable end of the brake shoe 2 is concentric with the brake shoe 2, so that the brake pad 20 has a high fit with the brake drum, the friction area is increased, the brake shoe 2 is subjected to balanced force, the wear of the brake pad 20 is reduced, the clamping tension is small, the fatigue fracture of the brake shoe 2 is avoided, the service life is long, and the safety, reliability and sensitivity are high.

In order to adjust the fit between the brake pad 20 and the brake drum and the clutch clearance, the clutch clearance refers to the gap between the brake pad 20 and the brake drum when the brake shoe 2 is opened. A connecting rod 33 and a locking nut 32 are installed on the piston rod of the clutch oil cylinder 30. The connecting rod 33 is threadedly connected to the piston rod, and the locking nut 32 locks the connecting rod 33. The connecting rod 33 is hinged to the pull arm 23. Loosening the locking nut 32 and rotating the connecting rod 33 can conveniently and quickly adjust the fit between the brake pad 20 and the brake drum and the clutch clearance.

In order to quickly return the clutch cylinder 30 and the brake shoe 2 from the clamped state to the open state, shorten the response time, and improve the sensitivity of the winch clutch mechanism, a return spring 31 is installed in the rod cavity of the clutch cylinder 30, and the return spring 31 retracts the piston rod of the clutch cylinder 30 to drive the brake shoe 2 to open.

As shown in Fig. 4, Fig. 5 and Fig. 6, the present invention provides a second embodiment of a winch clutch mechanism, which is different from the first embodiment in that it includes three brake shoes 2, a driving disk 1 and three driving mechanisms 3, and the central angle R1 of each brake shoe 2 is 100 degrees. As shown in Fig. 5, three support pin holes 11 are opened on the driving disk 1, and the three support pin holes 11 are symmetrically arranged.

The above-mentioned technologies are common knowledge to those skilled in the art. The above-mentioned are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

A winch clutch mechanism, characterized in that it comprises a brake shoe (2), a driving disc (1) and a driving mechanism (3), wherein a brake pad (20) is mounted on the inner surface of the brake shoe (2), brake ears (21) are mounted on both ends of the brake shoe (2), wherein one brake ear (21) is hinged to the driving disc (1), and the other brake ear (21) is hinged to a gear (22), an inner gear ring (10) is arranged in the driving disc (1), and the gear (22) meshes with the inner gear ring (10), and the driving mechanism (3) drives the brake shoe (2) to clamp and open, the positive rotation direction of the driving disc (1) is opposite to the clamping direction of the brake shoe (2), and the positive rotation direction of the driving disc (1) is the same as the opening direction of the brake shoe (2).
According to the winch clutch mechanism of claim 1, the driving mechanism (3) comprises a clutch cylinder (30), a pulling arm (23) is connected to the gear (22), and two ends of the clutch cylinder (30) are respectively hinged to the driving plate (1) and the pulling arm (23).
According to the winch clutch mechanism of claim 2, it is characterized in that a return spring (31) is installed in the rod chamber of the clutch cylinder (30), and the return spring (31) retracts the piston rod of the clutch cylinder (30), driving the brake shoe (2) to open.
The winch clutch mechanism according to claim 3 is characterized in that a connecting rod (33) and a locking nut (32) are installed on the piston rod of the clutch cylinder (30), the connecting rod (33) is threadedly connected to the piston rod, the locking nut (32) locks the connecting rod (33), and the connecting rod (33) is hinged to the pulling arm (23).
According to claim 1, the winch clutch mechanism is characterized in that it comprises two brake shoes (2) and two driving mechanisms (3), two supporting pin holes (11) are provided on the driving disc (1), the two supporting pin holes (11) are symmetrically arranged, one brake ear (21) of each brake shoe (2) is connected to the supporting pin hole (11) of the driving disc (1) through a supporting pin; the central angle R1 of each brake shoe (2) is less than 180 degrees; the central angle R1 of each brake shoe (2) is the same, and the two brake shoes (2) have the same clamping direction.
According to claim 1, the winch clutch mechanism is characterized in that it comprises three brake shoes (2) and three driving mechanisms (3), three supporting pin holes (11) are opened on the driving disc (1), and the three supporting pin holes (11) are symmetrically arranged; one brake ear (21) of each brake shoe (2) is connected to the supporting pin hole (11) of the driving disc (1) through a supporting pin; the central angle R1 of each brake shoe (2) is less than 120 degrees; the central angle R1 of each brake shoe (2) is the same, and the three brake shoes (2) have the same clamping direction.
The winch clutch mechanism according to claim 1 is characterized in that the inner gear ring (10) is cocentric with the driving disc (1).