Belt pulley pressing structure and traction device

Abstract

The utility model provides a belt pulley pressing structure and a traction device with the same. The belt wheel pressing structure comprises a belt, a belt wheel and a plurality of pressing wheels, the inner side face of the belt is connected with the belt wheel in a meshed mode, the pressing wheels are arranged on the side, connected with the belt, of the belt wheel in the circumferential direction of the belt wheel, and the pressing wheels are tightly attached to the outer side face of the belt so as to press the belt and the belt wheel. According to the structure, the multiple pressing wheels are arranged to conduct multi-point pressing on the belt and the belt wheel, friction traction force which must be transmitted between the belt and the belt wheel is guaranteed, the defects of slipping, belt floating and the like caused by loosening of the belt in the transmission process of the belt wheel are overcome, and the stability of the transmission process is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical transmission, and in particular to a pulley clamping structure and a traction device. Background Art

[0002] Belt drive structures are widely used in traction devices and transmission devices. They generally include a driving mechanism for providing power, a pulley for transmitting power, a belt for transmitting traction, and other components. The driving mechanism drives the pulley to rotate and drives the belt to move to achieve traction and transportation of materials. However, after long-term use, the belt will become somewhat loose, and there will be defects such as slippage and streamers between the belt and the pulley, resulting in a sharp drop in transmission efficiency. At this time, the usual practice is to use a tensioning device to adjust the tension of the belt so that the belt can return to its normal working level.

[0003] In the existing tensioning device, a tensioning wheel is generally provided to pull the belt by inner tensioning or outer tensioning to increase the tension of the belt. When pulling the belt, if the pulling force is not properly controlled, the belt will be too tight, which may damage the bearing of the pulley, increase the workload of the driving mechanism, and the belt will be easily worn, which will affect its service life. Summary of the invention

[0004] In order to solve the existing technical problems, the present application provides a pulley clamping structure and a traction device that can solve the belt loosening defect without pulling the belt.

[0005] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] On the one hand, an embodiment of the present application provides a pulley clamping structure, comprising a belt, a pulley and a plurality of clamping wheels, wherein the inner side surface of the belt is meshedly connected to the pulley, and the plurality of clamping wheels are arranged along the circumference of the pulley on one side where the pulley is connected to the belt, and the clamping wheel is arranged close to the outer side surface of the belt to clamp the belt and the pulley.

[0007] In one of the embodiments, in the circumferential direction of the pulley, the angle of the sector formed by the centers of the plurality of pressure wheels relative to the center of the pulley is not less than 180°.

[0008] In one of the embodiments, the pressure wheel includes a fixed shaft and a roller, the roller is rotatably mounted on the fixed shaft, and the roller is in rolling contact with the belt.

[0009] In one embodiment, the fixed shaft is arranged parallel to the axis of the pulley.

[0010] In one of the embodiments, both end edges of the roller are radially protruded with annular ribs, and the distance between the two ribs is greater than or equal to the width of the belt, so that the belt is confined between the two ribs.

[0011] In one embodiment, the maximum distance between two adjacent pressure wheels is smaller than the thickness of the belt.

[0012] In one embodiment, the sizes of the plurality of pressure wheels are the same or different.

[0013] In one embodiment, the width of the belt matches the axial length of the pulley.

[0014] On the other hand, an embodiment of the present application also provides a traction device, including a driving mechanism for driving the pulley to rotate, a winding mechanism for winding up the belt, and the pulley clamping structure described in any of the above items, one end of the belt is connected to the winding mechanism, and the other end is connected to the object to be pulled.

[0015] The pulley clamping structure of the present application and the traction device having the structure have at least the following beneficial effects: by arranging multiple clamping wheels, the belt and the pulley are clamped at multiple points, thereby ensuring the friction traction force that must be transmitted between the belt and the pulley for transmission, avoiding defects such as slipping and streamers caused by belt loosening during the transmission process, and at the same time avoiding the problems of damage to the pulley bearing, increased workload of the driving mechanism, and easy wear of the belt caused by pulling the belt too tight in the prior art, thereby greatly improving the stability of the transmission process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a pulley clamping structure according to an embodiment of the present application;

[0017] Figure 2 for Figure 1 Schematic diagram of the split structure of the middle pressure wheel.

[0018] The components in the figure are numbered as follows: belt 10; pulley 20; pressure wheel 30; fixed shaft 31; roller 32; and retaining edge 321. DETAILED DESCRIPTION

[0019] The technical solution of the present application is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0020] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0021] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] The embodiment of the present application provides a pulley clamping structure, which can be applied to a synchronous belt transmission device or a belt traction device. Figure 1 The structure includes a belt 10, a pulley 20 and a plurality of pressure wheels 30. The belt 10 has an inner side and an outer side. The inner side of the belt 10 meshes with the gear teeth on the pulley 20. The pulley 20 can be a driving wheel or a driven wheel, so as to drive the belt 10 to move by driving the pulley 20 to rotate or drive the pulley 20 to rotate by moving the belt 10. The outer side of the belt 10 is smoothly arranged. A plurality of pressure wheels 30 are arranged along the circumference of the pulley 20 on the side where the pulley 20 is connected to the belt 10. The pressure wheels 30 are arranged close to the outer side of the belt 10 to press the belt 10 and the pulley 20. By setting a plurality of pressure wheels 30 to push the belt 10 against the pulley 20, the friction traction force that must be transmitted between the belt 10 and the pulley 20 is ensured, which effectively solves the defects of the belt 10 slipping and streamers during the transmission of the pulley 20, and greatly improves the stability of the transmission process.

[0023] Furthermore, the angle of the sector formed by the center of the plurality of pressure wheels 30 relative to the center of the belt pulley 20 is not less than 180°. That is, under the pressure of the pressure wheel 30, the contact length between the belt 10 and the belt pulley 20 is greater than half of the circumference of the belt pulley 20. In this way, the number of meshing teeth between the belt 10 and the belt pulley 20 can be increased, the frictional traction of the transmission between the belt 10 and the belt pulley 20 can be increased, and the stability of the transmission process can be further enhanced.

[0024] See also Figure 2In order to reduce the friction between the pinch wheel 30 and the belt 10, the pinch wheel 30 includes a fixed shaft 31 and a roller 32. The fixed shaft 31 plays a role in positioning the pinch wheel 30 as a whole. The end of the fixed shaft 31 is provided with a thread, which can be screwed into the threaded hole of the external device by a threaded connection to fix the position of the pinch wheel 30. The roller 32 can be rolled on the fixed shaft 31. The head end of the fixed shaft 31 is formed with a shaft head whose size is larger than the central through hole of the roller 32, which can prevent the roller 32 from coming off the fixed shaft 31. The roller 32 rolls with the outer side of the belt 10 to press the belt 10 and the pulley 20. When the belt 10 moves on the pulley 20, the roller 32 that presses the belt 10 rolls on the fixed shaft 31 as the belt 10 moves. In this way, the friction between the roller 32 and the belt 10 can be greatly reduced, so that the belt 10 moves more smoothly.

[0025] Preferably, the fixed shaft 31 is arranged parallel to the axis of the pulley 20, so that the contact position between the roller 32 and the belt 10 can be a straight strip parallel to the width direction of the belt 10, and the roller 32 is in full contact with the belt 10, thereby improving the clamping effect of the roller 32.

[0026] Furthermore, both ends of the roller 32 are provided with radially outwardly protruding ribs 321, and the ribs 321 extend along the circumference of the roller 32 to form an annular structure. The distance between the two ribs 321 of each roller 32 is greater than or equal to the width of the belt 10, so that the belt 10 is limited between the two ribs 321. In this way, in the thickness direction of the belt 10, the roller 32 cooperates with the pulley 20 to limit the slippage, streamer and other phenomena of the belt 10, and in the width direction of the belt 10, the ribs 321 limit the deviation of the belt 10, so that the belt 10 can only move in its length direction, and the belt 10 is prevented from being separated from the pulley 20.

[0027] In the embodiment, there are four pinch wheels 30, including two large pinch wheels 30 and two small pinch wheels 30. The two large pinch wheels 30 are respectively arranged at the two ends of the connecting section between the belt 10 and the pulley 20, and the two small pinch wheels 30 are arranged between the two large pinch wheels 30. However, the present application does not limit the size of the pinch wheels 30. In other embodiments, the sizes of the plurality of pinch wheels 30 can be the same or different, and can be arbitrarily selected if space permits. In order to achieve a better transmission and compression effect, the width of the belt 10 matches the axial length of the pulley 20, and the tooth grooves on the inner side of the belt 10 can fully mesh with the gear teeth on the pulley 20, thereby enhancing the transmission effect of the belt 10 and the pulley 20. At the same time, the maximum distance between two adjacent pinch wheels 30 is less than the thickness of the belt 10, so that the spacing between the pinch wheels 30 is not enough to form the ribbon phenomenon of the belt 10, further improving the stability of the transmission between the belt 10 and the pulley 20.

[0028] In addition, the embodiment of the present application also provides a traction device, which drives the belt 10 to move by driving the pulley 20 to rotate, and then performs operations such as hoisting and dragging the object to be traction. The traction device includes a driving mechanism for driving the pulley 20 to rotate, a winding mechanism for winding the belt 10, and the pulley clamping structure of the aforementioned embodiment, one end of the belt 10 is connected to the winding mechanism, and the other end is connected to the object to be traction. Since the traction device adopts all the technical solutions of the aforementioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the aforementioned embodiment, which are not repeated here. At the same time, the pressure wheel 30 can be used as a reversing wheel of the belt 10, so that the belt 10 changes the winding direction and connects to the winding mechanism at different positions under the compression state of the pressure wheel 30. Moreover, the traction device can keep the position of the traction end of the belt 10 (i.e., the separation point between the pulley 20 and the belt 10) unchanged, and the excess length of the belt 10 is wound and stored by the winding mechanism, so as to avoid the radial thickness increase caused by the belt 10 being wound directly on the pulley 20, thereby changing the position of the traction end relative to the object to be traction, thereby improving the stability of the traction process.

[0029] In summary, the clamping structure of the pulley 20 and the traction device having the same in the embodiment of the present application, by setting a clamping wheel 30, compresses the belt 10 and the pulley 20 at multiple points, thereby ensuring the friction traction force that must be transmitted between the belt 10 and the pulley 20 for transmission, avoiding defects such as slipping and streamers of the pulley 20 during the transmission process, and greatly improving the stability of the transmission process.

[0030] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0031] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A pulley clamping structure, characterized in that: It includes a belt, a pulley and a plurality of pressure wheels, wherein the inner side surface of the belt is meshedly connected with the pulley, and the plurality of pressure wheels are arranged along the circumference of the pulley on one side where the pulley is connected to the belt, and the pressure wheel is arranged closely to the outer side surface of the belt to press the belt and the pulley.

2. The pulley pressing structure according to claim 1, characterized in that: In the circumferential direction of the pulley, the angle of the sector formed by the centers of the plurality of pressure wheels relative to the center of the pulley is not less than 180°.

3. The pulley pressing structure according to claim 2, characterized in that: The clamping wheel comprises a fixed shaft and a roller. The roller is rotatably sleeved on the fixed shaft, and the roller is in rolling contact with the belt.

4. The pulley pressing structure according to claim 3, characterized in that: The fixed shaft is arranged parallel to the axis of the pulley.

5. The pulley pressing structure according to claim 3, characterized in that: Both end edges of the roller are radially protruded with annular ribs, and the distance between the two ribs is greater than or equal to the width of the belt, so that the belt is limited between the two ribs.

6. The pulley pressing structure according to claim 1, characterized in that: The maximum distance between two adjacent pressure wheels is smaller than the thickness of the belt.

7. The pulley pressing structure according to claim 1, characterized in that: The sizes of the plurality of pressure wheels are the same or different.

8. The pulley pressing structure according to claim 1, characterized in that: The width of the belt matches the axial length of the pulley.

9. A traction device, characterized in that: It comprises a driving mechanism for driving the pulley to rotate, a winding mechanism for winding the belt, and a pulley clamping structure as described in any one of claims 1 to 8, one end of the belt is connected to the winding mechanism, and the other end is connected to the object to be towed.

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