WO2024087374A1

WO2024087374A1 - Tie down strap tightening device

Info

Publication number: WO2024087374A1
Application number: PCT/CN2022/142734
Authority: WO
Inventors: 刘至国; 阮云波; 朱正中
Original assignee: 浙江双友物流器械股份有限公司
Priority date: 2022-10-25
Filing date: 2022-12-28
Publication date: 2024-05-02
Also published as: CN115723996A

Abstract

A tie down strap tightening device, comprising a driving shaft (1), a transmission inner gear sleeve (2), an outer ring gear (4), and a tightening shaft (3) used for tightening a tie down strap. The driving shaft (1) is provided with crowbar insertion holes (1.1); a ratchet wheel (5) coaxially distributed with the driving shaft (1) is fixedly arranged on the driving shaft (1); the transmission inner gear sleeve (2) is coaxially sleeved on the driving shaft (1); the outer ring gear (4) is arranged in the transmission inner gear sleeve (2), and the outer ring gear (4) is meshed with the transmission inner gear sleeve (2); the ratchet wheel (5) is located in the outer ring gear (4); ratchets (8) and elastic pieces (9) are arranged on the inner wall of the outer ring gear (4); the ratchets (8) are meshed with the ratchet wheel (5) under the action of the elastic pieces (9); the tightening shaft (3) is connected to the transmission inner gear sleeve (2); and the transmission inner gear sleeve (2) is used for driving the tightening shaft (3) to rotate. The device is compact in structure and convenient to operate, and can adapt to rotation of a crowbar within a small angle range so as to tighten goods.

Description

A binding belt tightening device

Technical Field

The invention relates to a winch, in particular to a binding belt tightening device for the winch.

Background technique

During the freight transportation process, it is usually necessary to tie the goods to prevent them from falling off or colliding. Traditionally, goods are tied directly with ropes. Although this method has good versatility, the tying process is time-consuming and labor-intensive, and it is difficult to tie the goods tightly.

In order to solve the shortcomings of traditional cargo bundling methods, winches and ropes are often used for bundling. At present, winches are divided into manual and electric types. Manual winches are generally composed of a bracket, a tightening shaft with a ratchet mechanism, and a crowbar for driving the tightening shaft to rotate, and the rope is wound around the tightening shaft. When bundling goods, the tightening shaft is driven to rotate by the crowbar, and the rope is wound around the tightening shaft to tie the goods tightly. Although the current manual winch can effectively solve the shortcomings of traditional cargo bundling methods; however, since the crowbar drives the tightening shaft to rotate in the process of rotating, it is necessary to rotate 360 degrees around the tightening shaft. In actual use, the winch's crowbar can often only rotate within a small angle range, causing the crowbar to interfere with the cargo and unable to rotate 360 degrees around the tightening shaft, resulting in inconvenience in operation and even the inability to tie the goods tightly.

Summary of the invention

The purpose of the present invention is to provide a binding belt tightening device which has a compact structure, is easy to operate, and can adapt to the rotation of a crowbar within a small angle range to achieve the purpose of tying up goods.

The technical solution of the present invention is:

A binding belt tightening device, comprising:

A driving shaft, on which a crowbar insertion hole is provided, and a ratchet wheel coaxially arranged with the driving shaft is fixedly provided on the driving shaft;

A transmission internal gear sleeve, which is coaxially sleeved on the driving shaft;

An outer gear ring, which is arranged in the transmission inner gear sleeve and meshes with the transmission inner gear sleeve, and the ratchet is located in the outer gear ring, and ratchet teeth and an elastic member are arranged on the inner wall of the outer gear ring, and the ratchet teeth mesh with the ratchet under the action of the elastic member;

The tightening shaft used to tighten the binding belt is connected to the transmission inner gear sleeve, and the transmission inner gear sleeve is used to drive the tightening shaft to rotate. The binding belt tightening device of this scheme can adapt to the rotation of the crowbar within a small angle range to achieve the purpose of tying up the cargo. On the other hand, the ratchet, ratchet teeth, elastic member and outer gear ring are all located in the transmission inner gear sleeve, and its structure is compact, especially it can improve the compactness of the structure in the axial direction of the drive shaft, can reduce the volume of the device, and facilitate the actual use of the winch.

Preferably, an external gear is fixedly provided at one end of the tightening shaft, the external gear is located in the transmission inner gear sleeve, the external gear and the transmission inner gear sleeve are coaxially distributed, and the external gear and the transmission inner gear sleeve are meshed. In this way, through the meshing of the external gear and the transmission inner gear sleeve, the driving force of the drive shaft can be stably and reliably transmitted to the tightening shaft through the transmission inner gear sleeve and the external gear, so as to ensure that the goods are tied tightly. At the same time, the external gear is also located in the transmission inner gear sleeve, which can ensure a compact structure.

Preferably, the ratchet is fixedly arranged on one end face of the driving shaft, a limiting convex shaft coaxial with the ratchet is arranged on the end face of the ratchet, a limiting shaft hole cooperating with the limiting convex shaft is arranged on the external gear, and the limiting convex shaft is inserted into the limiting shaft hole. In this way, the limiting convex shaft cooperates with the limiting shaft hole, so that the ratchet, the ratchet, the external gear and the transmission inner gear sleeve are coaxially distributed, and the structure is compact.

Preferably, the outer diameter of the ratchet is smaller than the outer diameter of the drive shaft, and the outer gear ring, the ratchet and the ratchet teeth are all located between the end face of the drive shaft where the ratchet is located and the outer gear. This is beneficial to improving the compactness of the structure on the one hand, and on the other hand, the ratchet and the ratchet teeth can be limited between the end face of the drive shaft and the outer gear.

Preferably, the transmission inner gear sleeve is fixedly connected to the outer gear, the drive shaft is provided with an annular boss extending outward, the transmission inner gear sleeve is provided with a limiting boss that cooperates with the outer annular boss, and the annular boss is located between the outer gear and the limiting boss. In this solution, the transmission inner gear sleeve is fixedly connected to the outer gear to connect the transmission inner gear sleeve and the outer gear as a whole; at the same time, the outer annular boss cooperates with the limiting boss to axially limit the outer gear, the transmission inner gear sleeve and the drive shaft, thereby ensuring that the device structure is stable and reliable.

Preferably, a sealing ring is provided between the limiting boss and the driving shaft.

Preferably, the transmission inner gear sleeve is fixedly connected to the outer gear by riveting, or the transmission inner gear sleeve is fixedly connected to the outer gear by welding, or the transmission inner gear sleeve is fixedly connected to the outer gear by bolts.

Preferably, an annular groove extending around the circumference of the external gear is provided on the end surface of the external gear, the tightening shaft is a hollow shaft, one end of the tightening shaft is provided on an arc-shaped stopper matched with the annular groove, the arc-shaped stopper is inserted in the annular groove, and the tightening shaft is connected to the external gear by welding. In this way, the reliability of the transmission of the torsional force between the external gear and the tightening shaft can be effectively improved by the cooperation between the arc-shaped stopper and the annular groove.

Preferably, the elastic member is a compression spring or a spring sheet, one end of which is fixed to the inner wall of the outer gear ring, and the other end of which is against the ratchet teeth to enable the ratchet teeth to mesh with the ratchet wheel.

Preferably, a ratchet receiving groove is provided on the inner wall of the outer gear ring, a ratchet clamping groove with a circular arc cross section is provided on the inner wall of the ratchet receiving groove, a ratchet shaft is provided at one end of the ratchet, the ratchet shaft is rotatably arranged in the ratchet clamping groove, and the elastic member is located in the ratchet receiving groove. In this way, the inner diameter of the outer gear ring can be reduced without affecting the normal operation of the device, which is conducive to reducing the outer diameter of the outer gear ring and the outer diameter of the transmission inner gear sleeve, thereby further improving the compactness of the structure.

The beneficial effects of the present invention are: compact structure, easy operation, and the ability to adapt to the rotation of the crowbar within a small angle range to realize the binding belt tightening device for tying up the goods.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a three-dimensional partial structure of a binding belt tightening device of the present invention.

FIG. 2 is a schematic diagram of a partial cross-sectional structure of a binding belt tightening device of the present invention.

Fig. 3 is a schematic diagram of a cross-sectional structure at A-A in Fig. 2.

FIG. 4 is a schematic structural diagram of a transmission internal gear sleeve of a binding belt tightening device of the present invention.

FIG. 5 is a schematic structural diagram of an external gear of a binding belt tightening device of the present invention.

In the figure:

Drive shaft 1, crowbar socket 1.1, annular boss 1.2;

Transmission internal gear sleeve 2, limiting boss 2.1;

Tightening shaft 3;

Outer gear ring 4;

Ratchet 5;

External gear 6, limiting shaft hole 6.1, annular groove 6.2;

Limiting cam 7;

Ratchet 8, ratchet shaft 8.1;

Elastic member 9;

Ratchet receiving groove 10.

Detailed ways

The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

Specific embodiment 1: As shown in Figures 1, 2, 3 and 4, a binding belt tightening device includes a drive shaft 1, a transmission inner gear sleeve 2, an outer gear ring 4 and a tightening shaft 3 for tightening the binding belt. The drive shaft is provided with a crowbar insertion hole 1.1, which extends along the radial direction of the drive shaft and penetrates the drive shaft. A ratchet 5 coaxially distributed with the drive shaft is fixedly arranged on the drive shaft. The transmission inner gear sleeve is coaxially sleeved on the drive shaft. The outer gear ring is arranged in the transmission inner gear sleeve, and the outer gear ring is meshed with the transmission inner gear sleeve. The ratchet is located in the outer gear ring, and the ratchet is coaxially distributed with the outer gear ring. A ratchet 8 and an elastic member 9 are provided on the inner wall of the outer gear ring. The ratchet is meshed with the ratchet under the action of the elastic member. The tightening shaft is connected to the transmission inner gear sleeve, and the transmission inner gear sleeve is used to drive the tightening shaft to rotate.

The specific use of the binding belt tightening device of this embodiment is as follows: insert the crowbar into the crowbar jack, drive the drive shaft to rotate through the crowbar, and the drive shaft drives the outer gear ring to rotate through the ratchet and ratchet, and then drives the tightening shaft to rotate through the transmission inner gear sleeve to tighten the binding belt wound on the tightening shaft, so as to tighten the goods. Since the drive shaft of the binding belt tightening device of this embodiment drives the outer gear ring, the transmission inner gear sleeve and the tightening shaft to rotate through the ratchet and ratchet, the crowbar can be used to swing back and forth in a small angle range according to the actual situation, so as to drive the tightening shaft to rotate, and the goods can be tied up. It is easy to operate and can effectively solve the problem that the crowbar cannot rotate 360 degrees around the tightening shaft due to the interference between the crowbar and the goods (it can only rotate within a small angle range). Of course, if it is actually allowed, the crowbar can also drive the tightening shaft to rotate by rotating continuously around the tightening shaft to tighten the goods. On the other hand, the ratchet, ratchet teeth, elastic member and outer gear ring are all located in the transmission inner gear sleeve, which has a compact structure, especially can improve the compactness of the structure in the axial direction of the drive shaft, can reduce the size of the device, and facilitate the actual use of the winch.

Specifically, as shown in Figures 1, 2 and 3, a ratchet receiving groove 10 is provided on the inner wall of the outer gear ring 4. A ratchet groove with a circular arc cross section is provided on the inner wall of the ratchet receiving groove. In this embodiment, the ratchet groove extends along the axial direction of the outer gear ring, and the outer gear ring passes through the two end surfaces of the outer gear ring. A ratchet shaft 8.1 is provided at one end of the ratchet 8, and the ratchet shaft is rotatably arranged in the ratchet groove. The ratchet shaft is parallel to the axis of the outer gear ring. The elastic member is located in the ratchet receiving groove. In this way, the inner diameter of the outer gear ring can be reduced without affecting the normal operation of the device, which is beneficial to reducing the outer diameter of the outer gear ring and the outer diameter of the transmission inner gear sleeve, thereby facilitating further improving the compactness of the structure.

In one implementation of this embodiment, the elastic member is a compression spring, one end of the compression spring is fixed to the inner wall of the outer gear ring, and the other end of the compression spring is against the ratchet teeth, so that the ratchet teeth are engaged with the ratchet wheel. Specifically, an elastic member slot is provided on the inner wall of the ratchet accommodating groove, and one end of the compression spring is fixed in the elastic member slot.

In another implementation of this embodiment, the elastic member is a spring sheet, one end of which is fixed to the inner wall of the outer gear ring, and the other end of which is against the ratchet teeth, so that the ratchet teeth are engaged with the ratchet wheel. Specifically, an elastic member slot is provided on the inner wall of the ratchet accommodating groove, and one end of the spring sheet is fixed in the elastic member slot.

In the third implementation of this embodiment, the elastic member is a torsion spring, and an elastic member slot is provided on the inner wall of the ratchet accommodating groove. The torsion spring is limited in the elastic member slot, one end of the torsion spring abuts against the inner wall of the ratchet accommodating groove, and the other end of the torsion spring abuts against the ratchet to enable the ratchet to engage with the ratchet wheel.

As shown in Figures 1, 2, 3, 4 and 5, an external gear 6 is fixedly provided at one end of the tightening shaft. The tightening shaft is coaxially arranged with the external gear. The external gear is located in the transmission inner gear sleeve, the external gear is coaxially arranged with the transmission inner gear sleeve, and the external gear is meshed with the transmission inner gear sleeve. In this way, through the meshing of the external gear and the transmission inner gear sleeve, the driving force of the drive shaft can be stably and reliably transmitted to the tightening shaft through the transmission inner gear sleeve and the external gear to ensure that the goods are tied tightly. At the same time, the external gear is also located in the transmission inner gear sleeve, which can ensure a compact structure.

The ratchet 5 is fixedly arranged on one end face of the driving shaft 1. A limiting cam 7 coaxial with the ratchet is arranged on the end face of the ratchet. In this embodiment, the driving shaft, the ratchet and the limiting cam are an integrally formed structure. The outer gear 6 is provided with a limiting shaft hole 6.1 which cooperates with the limiting cam. The limiting shaft hole is coaxially distributed with the outer gear. The limiting cam is inserted into the limiting shaft hole. In this way, the limiting cam cooperates with the limiting shaft hole, so that the ratchet, the ratchet, the outer gear and the transmission inner gear sleeve are kept coaxially distributed, and the structure is compact.

The outer diameter of the ratchet is smaller than the outer diameter of the drive shaft. The outer gear ring, the ratchet and the ratchet teeth are all located between the end face of the drive shaft where the ratchet is located and the outer gear. In this way, on the one hand, it is conducive to improving the compactness of the structure, and on the other hand, the ratchet and the ratchet teeth can be limited between the end face of the drive shaft and the outer gear.

The transmission inner gear sleeve 2 is fixedly connected to the outer gear 6. In this embodiment, the transmission inner gear sleeve is fixedly connected to the outer gear by riveting, or the transmission inner gear sleeve is fixedly connected to the outer gear by welding, or the transmission inner gear sleeve is fixedly connected to the outer gear by bolts. An annular boss 1.2 extending outward is provided on the drive shaft, and a limiting boss 2.1 cooperating with the outer annular boss is provided on the transmission inner gear sleeve, and the annular boss is located between the outer gear and the limiting boss. The limiting boss is annular. A sealing ring is provided between the limiting boss and the drive shaft. The transmission inner gear sleeve is fixedly connected to the outer gear to connect the transmission inner gear sleeve and the outer gear as a whole; at the same time, the outer annular boss cooperates with the limiting boss to axially limit the outer gear, the transmission inner gear sleeve and the drive shaft to ensure that the device structure is stable and reliable.

An annular groove 6.2 extending around the circumference of the external gear is provided on the end face of the external gear 6. In the present embodiment, there are two annular grooves, and the two annular grooves are evenly distributed around the circumference of the external gear. The tightening shaft is a hollow shaft, and one end of the tightening shaft is provided with an arc-shaped limit block that cooperates with the annular groove, and the arc-shaped limit block corresponds to the annular groove one by one. The arc-shaped limit block is inserted into the corresponding annular groove, and the tightening shaft is connected to the external gear by welding. In this way, the transmission reliability of the torsional force between the external gear and the tightening shaft can be effectively improved by cooperating with the arc-shaped limit block and the annular groove.

The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

A binding belt tightening device, characterized in that it comprises:

A driving shaft, on which a crowbar insertion hole is provided, and a ratchet wheel coaxially arranged with the driving shaft is fixedly provided on the driving shaft;

A transmission internal gear sleeve, which is coaxially sleeved on the driving shaft;

An outer gear ring, which is arranged in the transmission inner gear sleeve and meshes with the transmission inner gear sleeve, and the ratchet is located in the outer gear ring, and ratchet teeth and an elastic member are arranged on the inner wall of the outer gear ring, and the ratchet teeth mesh with the ratchet under the action of the elastic member;

The tightening shaft is used to tighten the binding belt, and the tightening shaft is connected to the transmission internal gear sleeve, and the transmission internal gear sleeve is used to drive the tightening shaft to rotate.
According to the binding belt tightening device described in claim 1, it is characterized in that an external gear is fixedly provided at one end of the tightening shaft, the external gear is located in the transmission internal gear sleeve, the external gear and the transmission internal gear sleeve are coaxially distributed, and the external gear and the transmission internal gear sleeve are meshed.
According to a binding belt tightening device as described in claim 2, it is characterized in that the ratchet is fixedly arranged on one end face of the driving shaft, a limiting cam shaft coaxial with the ratchet is provided on the end face of the ratchet, a limiting shaft hole cooperating with the limiting cam shaft is provided on the external gear, and the limiting cam shaft is inserted in the limiting shaft hole.
According to the binding belt tightening device described in claim 3, it is characterized in that the outer diameter of the ratchet is smaller than the outer diameter of the drive shaft, and the outer gear ring, ratchet and ratchet teeth are all located between the end face of the drive shaft where the ratchet is located and the external gear.
According to a binding belt tightening device as described in claim 2, 3 or 4, it is characterized in that the transmission inner gear sleeve is fixedly connected to the outer gear, the drive shaft is provided with an annular boss extending outward, the transmission inner gear sleeve is provided with a limiting boss that cooperates with the outer annular boss, and the annular boss is located between the outer gear and the limiting boss.
According to the binding belt tightening device according to claim 5, it is characterized in that a sealing ring is provided between the limiting boss and the driving shaft.
According to a binding belt tightening device as described in claim 2, 3 or 4, it is characterized in that the transmission inner gear sleeve is fixedly connected to the outer gear by riveting, or the transmission inner gear sleeve is fixedly connected to the outer gear by welding, or the transmission inner gear sleeve is fixedly connected to the outer gear by bolts.
According to a binding belt tightening device as described in claim 2, 3 or 4, it is characterized in that an annular groove extending around the circumferential direction of the external gear is provided on the end face of the external gear, the tightening shaft is a hollow shaft, one end of the tightening shaft is provided on an arc-shaped limit block matching with the annular groove, the arc-shaped limit block is inserted in the annular groove, and the tightening shaft is connected to the external gear by welding.
According to a binding belt tightening device as described in claim 1, 2, 3 or 4, it is characterized in that the elastic member is a compression spring or a spring leaf, one end of the compression spring or the spring leaf is fixed to the inner wall of the outer gear ring, and the other end of the compression spring or the spring leaf abuts against the ratchet teeth to enable the ratchet teeth to engage with the ratchet wheel.
According to a binding belt tightening device as described in claim 1, 2, 3 or 4, it is characterized in that a ratchet accommodating groove is provided on the inner wall of the outer gear ring, a ratchet clamping groove with a circular arc cross-section is provided on the inner wall of the ratchet accommodating groove, a ratchet shaft is provided at one end of the ratchet, the ratchet shaft is rotatably set in the ratchet clamping groove, and the elastic member is located in the ratchet accommodating groove.