A binding belt tightening device

Abstract

The present invention discloses a binding strap tightening device, which aims to provide a binding strap tightening device with a compact structure, easy operation, and the ability to adapt to the rotation of a crowbar within a small angle range to achieve the purpose of tightening cargo. The binding strap tightening device comprises a drive shaft, the drive shaft being provided with a crowbar insertion hole, the drive shaft being fixedly provided with a ratchet coaxially distributed with the drive shaft; a transmission inner gear sleeve, the transmission inner gear sleeve being coaxially sleeved on the drive shaft; an outer gear ring, the outer gear ring being disposed within the transmission inner gear sleeve and meshing with the transmission inner gear sleeve, the ratchet being located within the outer gear ring, the inner wall of the outer gear ring being provided with ratchet teeth and an elastic member, the ratchet teeth meshing with the ratchet wheel under the action of the elastic member; and a tightening shaft for tightening the binding strap, the tightening shaft being connected to the transmission inner gear sleeve, and the transmission inner gear sleeve being used to drive the tightening shaft to rotate.

Description

Technical Field

[0001] The invention relates to a winch, in particular to a binding belt tightening device for the winch. Background Art

[0002] Freight transportation usually requires bundling to prevent it from falling off or colliding. Traditionally, bundling is done directly with ropes. Although this method is versatile, it is time-consuming and labor-intensive, and it is difficult to tie the goods tightly.

[0003] In order to solve the shortcomings of traditional cargo bundling methods, winches and ropes are often used for bundling. Currently, winches are divided into manual and electric types. Manual winches generally consist of a bracket, a tightening shaft with a ratchet mechanism, and a crowbar for driving the tightening shaft to rotate. The rope is wound around the tightening shaft. When bundling cargo, the crowbar is used to drive the tightening shaft to rotate, and the rope is wound around the tightening shaft, thereby tightening the cargo. 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, it needs 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 cargo tightly. Summary of the Invention

[0004] 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 tightening cargo.

[0005] The technical solution of the present invention is:

[0006] A binding belt tightening device, comprising:

[0007] A driving shaft, wherein a crowbar socket is provided on the driving shaft, and a ratchet wheel coaxially arranged with the driving shaft is fixedly provided on the driving shaft;

[0008] The transmission internal gear sleeve is coaxially sleeved on the driving shaft;

[0009] 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 inner wall of the outer gear ring is provided with ratchet teeth and an elastic member. The ratchet teeth are meshed with the ratchet wheel under the action of the elastic member;

[0010] The tightening shaft used to tighten the binding strap is connected to a transmission inner gear sleeve, which is used to drive the tightening shaft to rotate. The binding strap tightening device of this solution can adapt to the rotation of the crowbar within a small angle range to achieve the purpose of tightening the cargo. Furthermore, the ratchet, ratchet teeth, elastic member, and outer gear ring are all located within the transmission inner gear sleeve, resulting in a compact structure. In particular, it can improve the structural compactness in the axial direction of the drive shaft, reduce the size of the device, and facilitate the actual use of the winch.

[0011] Preferably, an external gear is fixedly mounted on one end of the take-up shaft. The external gear is located within the transmission inner gear sleeve, coaxially distributed with the transmission inner gear sleeve, and meshes with the transmission inner gear sleeve. This meshing of the external gear and the transmission inner gear sleeve allows the driving force of the drive shaft to be stably and reliably transmitted to the take-up shaft via the transmission inner gear sleeve and the external gear, ensuring that the cargo is securely tied. Furthermore, the external gear is also located within the transmission inner gear sleeve, ensuring a compact structure.

[0012] Preferably, the ratchet is fixedly mounted on one end face of the drive shaft, a limiting cam is provided on the end face of the ratchet and is coaxial with the ratchet, and the external gear is provided with a limiting shaft hole that cooperates with the limiting cam, and the limiting cam is inserted into the limiting shaft hole. In this way, through the cooperation of the limiting cam and the limiting shaft hole, the ratchet, the ratchet, the external gear, and the transmission internal gear sleeve are kept coaxially distributed, and the structure is compact.

[0013] Preferably, the outer diameter of the ratchet wheel is smaller than the outer diameter of the drive shaft, and the outer gear ring, ratchet wheel, and ratchet teeth are all located between the end face of the drive shaft on which the ratchet wheel is located and the external gear. This improves the compactness of the structure and allows the ratchet wheel and ratchet teeth to be positioned between the end face of the drive shaft and the external gear.

[0014] Preferably, the transmission inner gear sleeve is fixedly connected to the external gear, the drive shaft is provided with an outwardly extending annular boss, and the transmission inner gear sleeve is provided with a limiting boss that cooperates with the outer annular boss, with the annular boss being located between the external gear and the limiting boss. In this solution, the transmission inner gear sleeve and the external gear are fixedly connected, integrating the transmission inner gear sleeve and the external gear. At the same time, the outer annular boss cooperates with the limiting boss to axially limit the external gear, the transmission inner gear sleeve, and the drive shaft, ensuring a stable and reliable structure.

[0015] Preferably, a sealing ring is provided between the limiting boss and the driving shaft.

[0016] 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.

[0017] Preferably, an annular groove extending circumferentially around the external gear is provided on the end face of the external gear. The tightening shaft is a hollow shaft, one end of which is secured to an arcuate stopper that engages the annular groove. The arcuate stopper is inserted into the annular groove, and the tightening shaft and external gear are connected by welding. In this manner, the arcuate stopper and the annular groove cooperate to effectively improve the reliability of torsional force transmission between the external gear and the tightening shaft.

[0018] Preferably, the elastic member is a compression spring or a spring sheet, one end of the compression spring or spring sheet is fixed to the inner wall of the outer gear ring, and the other end of the compression spring or spring sheet abuts against the ratchet teeth to engage the ratchet teeth with the ratchet wheel.

[0019] Preferably, a ratchet receiving groove is provided on the inner wall of the outer gear ring, and a ratchet clamping groove having an arc-shaped cross section is provided on the inner wall of the ratchet receiving groove. A ratchet shaft is provided at one end of the ratchet, and the ratchet shaft is rotatably disposed in the ratchet clamping groove, with the elastic member located within 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, thereby facilitating the reduction of 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.

[0020] 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

[0021] Figure 1 It is a three-dimensional partial structural schematic diagram of a binding belt tightening device of the present invention.

[0022] Figure 2 It is a partial cross-sectional structural schematic diagram of a binding belt tightening device of the present invention.

[0023] Figure 3 yes Figure 2 Schematic diagram of a cross-sectional structure at AA in the middle.

[0024] Figure 4 It is a structural schematic diagram of a transmission internal gear sleeve of a binding belt tightening device of the present invention.

[0025] Figure 5 It is a structural schematic diagram of an external gear of a binding belt tightening device of the present invention.

[0026] In the picture:

[0027] Drive shaft 1, crowbar socket 1.1, annular boss 1.2;

[0028] Transmission internal gear sleeve 2, limiting boss 2.1;

[0029] Tighten shaft 3;

[0030] Outer gear ring 4;

[0031] Ratchet 5;

[0032] External gear 6, limiting shaft hole 6.1, annular groove 6.2;

[0033] Limiting cam 7;

[0034] Ratchet 8, ratchet shaft 8.1;

[0035] Elastic member 9;

[0036] Ratchet receiving groove 10. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0038] Specific embodiment 1: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, 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. A crowbar socket 1.1 is provided on the drive shaft, and the crowbar socket extends along the radial direction of the drive shaft and passes through the drive shaft. A ratchet 5 coaxially distributed with the drive shaft is fixedly provided on the drive shaft. The transmission inner gear sleeve is coaxially sleeved on the drive shaft. The outer gear ring is provided in the transmission inner gear sleeve, and the outer gear ring is engaged 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 engaged 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.

[0039] The strap tightening device of this embodiment is specifically used as follows: a crowbar is inserted into the crowbar insertion hole, and the crowbar drives the drive shaft to rotate. The drive shaft drives the outer ring gear to rotate through the ratchet and ratchet teeth, and then drives the take-up shaft to rotate through the transmission inner gear sleeve, thereby tightening the strap wound on the take-up shaft, thereby tightening the cargo. Because the drive shaft of the strap tightening device of this embodiment drives the outer ring gear, the transmission inner gear sleeve, and the take-up shaft to rotate through the ratchet and ratchet teeth, the crowbar can, if practical, swing back and forth within a small angle range to drive the take-up shaft to rotate, thereby tightening the cargo. This is convenient to operate and effectively solves the problem of being unable to tighten the cargo due to the crowbar interfering with the cargo (it can only rotate within a small angle range) and being unable to rotate 360 ​​degrees around the take-up shaft. Of course, if practical, the crowbar can also drive the take-up shaft to rotate by rotating continuously around the take-up shaft to tighten 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 structural compactness in the axial direction of the drive shaft, reduce the volume of the device, and facilitate the actual use of the winch.

[0040] Specifically, such as Figure 1 、 Figure 2 、 Figure 3 As shown, a ratchet receiving groove 10 is provided on the inner wall of the outer gear ring 4. A ratchet retaining groove with an arc-shaped cross section is provided on the inner wall of the ratchet retaining groove. In this embodiment, the ratchet retaining groove extends along the axial direction of the outer gear ring, and the outer gear ring passes through the two end faces 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 set in the ratchet retaining groove. The ratchet shaft is parallel to the axis of the outer gear ring. The elastic member is located in the ratchet retaining 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 further improving the compactness of the structure.

[0041] In one embodiment of this embodiment, the elastic member is a compression spring, one end of which is fixed to the inner wall of the outer gear ring, and the other end of which abuts against the ratchet teeth to engage the ratchet teeth with the ratchet wheel. Specifically, an elastic member retaining groove is provided on the inner wall of the ratchet tooth receiving groove, and one end of the compression spring is fixed in the elastic member retaining groove.

[0042] In another embodiment 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 abuts against the ratchet teeth to engage the ratchet teeth with the ratchet wheel. Specifically, an elastic member retaining groove is provided on the inner wall of the ratchet tooth receiving groove, and one end of the spring sheet is fixed in the elastic member retaining groove.

[0043] 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 rests on the inner wall of the ratchet accommodating groove, and the other end of the torsion spring rests on the ratchet, so that the ratchet engages with the ratchet wheel.

[0044] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown, an external gear 6 is fixedly mounted on one end of the take-up shaft. The take-up shaft and the external gear are coaxially located within the transmission sleeve. The external gear meshes with the transmission sleeve, ensuring that the drive force from the drive shaft is stably and reliably transmitted to the take-up shaft through the transmission sleeve and the external gear, ensuring that the cargo is securely tied. Furthermore, the external gear is located within the transmission sleeve, ensuring a compact structure.

[0045] The ratchet 5 is fixedly mounted on one end face of the drive shaft 1. A limiting cam 7 coaxial with the ratchet is provided on the end face of the ratchet. In this embodiment, the drive shaft, ratchet, and limiting cam are integrally formed. The external gear 6 is provided with a limiting shaft hole 6.1 that cooperates with the limiting cam. The limiting shaft hole is coaxial with the external gear. The limiting cam is inserted into the limiting shaft hole. Thus, by cooperating with the limiting shaft hole, the ratchet, ratchet, external gear, and transmission inner gear sleeve are kept coaxially distributed, and the structure is compact.

[0046] The outer diameter of the ratchet is smaller than that of the drive shaft. The outer ring gear, ratchet, and ratchet teeth are all located between the end face of the drive shaft where the ratchet is located and the external gear. This improves structural compactness while also confining the ratchet and teeth between the end face of the drive shaft and the external gear.

[0047] 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 outwardly extending annular boss 1.2 is provided on the drive shaft, and a limiting boss 2.1 that cooperates 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.

[0048] The end face of the external gear 6 is provided with an annular groove 6.2 extending circumferentially around the external gear. In this embodiment, there are two annular grooves, evenly spaced around the circumference of the external gear. The tightening shaft is a hollow shaft, one end of which is provided with an arcuate stopper that mates with the annular groove. The arcuate stopper corresponds one-to-one with the annular groove. The arcuate stopper is inserted into the corresponding annular groove, and the tightening shaft and external gear are connected by welding. In this way, the coordination between the arcuate stopper and the annular groove effectively improves the reliability of the torsional force transmission between the external gear and the tightening shaft.

[0049] 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 fall within the scope of protection of the technical solution of the present invention.

Claims

1. A binding belt tightening device, characterized in that: include: A driving shaft, wherein a crowbar socket is provided on the driving shaft, and a ratchet wheel coaxially arranged with the driving shaft is fixedly provided on the driving shaft; The transmission internal gear sleeve is coaxially mounted 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 inner wall of the outer gear ring is provided with ratchet teeth and an elastic member. The ratchet teeth are meshed with the ratchet wheel under the action of the elastic member; A tightening shaft for tightening the binding belt, 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; An external gear is fixedly provided at one end of the tightening shaft, and 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; the ratchet is fixedly provided on one end face of the driving shaft, and a limiting cam is provided on the end face of the ratchet which is coaxial with the ratchet. A limiting shaft hole which cooperates with the limiting cam is provided on the external gear, and the limiting cam is inserted in the limiting shaft hole; the driving shaft, the ratchet and the limiting cam are an integrally formed structure.

2. A binding belt tightening device according to claim 1, 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 surface of the drive shaft where the ratchet is located and the outer gear.

3. A binding belt tightening device according to claim 1 or 2, characterized in that: The transmission inner gear sleeve is fixedly connected to the outer gear, the drive shaft is provided with an outwardly extending annular boss, 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.

4. A binding belt tightening device according to claim 3, characterized in that: A sealing ring is provided between the limiting boss and the driving shaft.

5. A binding belt tightening device according to claim 1 or 2, 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.

6. A binding belt tightening device according to claim 1 or 2, characterized in that: An annular groove extending around the circumference 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 that cooperates with the annular groove. The arc-shaped limit block is inserted in the annular groove.

7. A binding belt tightening device according to claim 6, characterized in that: The take-up shaft is connected to the external gear by welding.

8. A binding belt tightening device according to claim 1 or 2, characterized in that: 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.

9. A binding belt tightening device according to claim 1 or 2, characterized in that: A ratchet receiving groove is provided on the inner wall of the outer gear ring, and a ratchet clamping groove with an arc-shaped cross section is provided on the inner wall of the ratchet receiving groove. A ratchet shaft is provided at one end of the ratchet, and the ratchet shaft is rotatably arranged in the ratchet clamping groove. The elastic member is located in the ratchet receiving groove.

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