A drive tensioning device and drive system

Abstract

The present application belongs to the field of flexible transmission, in particular to a transmission tensioning device and a transmission system. The transmission tensioning device comprises a bracket, the bracket is provided with an adjusting long hole, a hollow block is slidingly installed in the adjusting long hole, a tensioning wheel shaft is installed in the hollow block, the hollow block is provided with outwardly extending and folded stop structures on both sides of the axial direction of the tensioning wheel shaft, and the stop structures are slidingly matched with the two side surfaces of the bracket. The transmission tensioning device reduces the use of bolt and nut connection, realizes firm and reliable sliding through the structure of the hollow block itself, avoids direct contact of the tensioning wheel shaft with the bracket, provides reliable support connection for the operation of the bearing on the tensioning wheel shaft and the tensioning wheel, simultaneously simplifies the installation steps and internal structure of the transmission tensioning device, makes the structure of the transmission tensioning device more compact and simple, makes the installation more rapid and efficient, and solves the problem of complex internal structure installation of the original transmission tensioning device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of flexible transmission, and particularly relates to a transmission tensioning device and a transmission system. BACKGROUND

[0002] At present, the flexible transmission system is widely applied in hoisting and transporting equipment due to the characteristics of simple structure, strong adaptability, accurate average transmission ratio, low manufacturing and installation cost, etc. It is composed of driving wheels, driven wheels and chains or belts wound on the wheels. In actual use, the chains or belts are affected by abrasion and gravity, and will be elongated and relaxed, which leads to the increase of the sag of the loose side of the chains or belts, the decrease of the tensioning force, and thus the problems of vibration, tooth skipping or slipping, noise increase, etc. Therefore, the tensioning device needs to be added.

[0003] The Chinese utility model patent with the authorization announcement No. CN201539543U and the authorization announcement date of August 4, 2010 provides a transmission tensioning device, which comprises a tensioning sprocket, a supporting seat, an adjusting plate, an adjusting bolt, an adjusting block and a spring. Longitudinal long grooves and adjusting holes communicating with the longitudinal long grooves are respectively formed on the adjusting plate in the longitudinal direction. The adjusting block is installed in the longitudinal long groove and is in sliding connection with the adjusting plate. The supporting shaft is installed at the end in the longitudinal long groove and is in sliding connection with the adjusting plate. One end of the spring is abutted against the adjusting block and the other end is fixed on one side of the supporting shaft. The adjusting bolt passes through the adjusting hole and is abutted against the other side of the supporting shaft. The adjusting hole is in line with the spring. A longitudinal long hole is formed on one side of the longitudinal long groove. The supporting shaft and the adjusting block are respectively fixedly connected by the sliding and locating through the longitudinal long hole and can slide in the longitudinal direction. The transmission tensioning device is used for tensioning and adjusting the chains in the transmission and has the functions of automatic adaptation, stable and reliable operation and convenience. However, the internal structure of the transmission tensioning device is more, the supporting shaft and the adjusting block need to be fixed by the sliding and locating, and the adjusting holes and the longitudinal grooves and the longitudinal holes in different directions are formed on the adjusting plate. Therefore, the assembly and adjustment of the transmission tensioning device are inconvenient, and the installation structure is relatively complex. SUMMARY

[0004] The present application aims to provide a transmission tensioning device to solve the technical problem of complex installation of the internal structure of the transmission tensioning device in the prior art.

[0005] The present application also aims to provide a transmission system using the above-mentioned transmission tensioning device.

[0006] To achieve the above-mentioned purpose, the technical scheme of the transmission tensioning device provided by the present application is as follows:

[0007] A transmission tensioning device includes a bracket with an adjusting elongated hole. A hollow stop block is slidably installed in the adjusting elongated hole. A tensioning wheel shaft is installed in the hollow stop block. The hollow stop block has outwardly extending and folding stop structures on both axial sides of the tensioning wheel shaft. The stop structures are slidably engaged with the two sides of the bracket.

[0008] The beneficial effects are as follows: The transmission tensioning device provided by this invention differs from the original transmission tensioning devices that have multiple slots in multiple directions for installing corresponding structures and use bolts to support and connect internal components. Instead, it has an adjusting elongated hole on the bracket, and a hollow stop block is slidably installed in the adjusting elongated hole. A tensioning wheel shaft is installed inside the hollow stop block, and the tensioning wheel shaft is used to install the connecting bearing and the tensioning wheel to achieve tension with the chain or belt. The hollow stop block is slidably installed in the adjusting elongated hole of the bracket, and its outer side extends outward and folds to form a stop structure. The stop structure also slides and engages with the two sides of the bracket. Therefore, the hollow stop block can slide in the adjusting elongated hole of the bracket without shifting or falling off. Thus, the hollow stop block drives the tensioning wheel shaft and the tensioning wheel to slide in the adjusting elongated hole and adjust the position of the bearing, that is, adjust the tension of the chain or belt. This transmission tensioning device reduces the use of bolt and nut connections, achieving a firm and reliable sliding through the structure of the hollow stop block itself. This avoids direct contact between the tension wheel shaft and the bracket, preventing wear, and provides reliable support for the bearings on the tension wheel shaft and the operation of the tension wheel. At the same time, it simplifies the installation steps and internal structure of the transmission tensioning device, making its structure more compact and simple, and its installation faster and more efficient, thus solving the problem of complex internal structure installation in the original transmission tensioning device.

[0009] As a further improvement, the hollow stop block is composed of two separate structures assembled along the axial direction of the tension wheel shaft.

[0010] The beneficial effects are: the hollow stop block adopts a split structure, which makes it easy for the hollow stop block with a stop structure on its outer side to be installed in the adjustment elongated hole of the bracket, further simplifying the internal structure of the transmission tensioning device, and the hollow stop block can be quickly installed without disassembling the bracket structure.

[0011] As a further improvement, the outer peripheral surface of the hollow stop is circular, and the adjusting elongated hole matches the outer peripheral surface of the hollow stop.

[0012] The beneficial effect is that setting the outer circumference of the hollow stop block to be circular can reduce the contact area between the hollow stop block and the adjusting elongated hole, thereby reducing the friction force on the hollow stop block and making its sliding smoother.

[0013] As a further improvement, bearings are respectively arranged between the tension wheel shaft and the hollow block on both sides, and a stop ring is arranged between the inner rings of the bearings, a boss is arranged on the hollow block to limit the relative position of the outer rings of the bearings on both sides, the boss is between the bearings on both sides, and the boss on both sides is pressed against the outer rings of the bearings.

[0014] The beneficial effect is that the arrangement of bearings between the tension wheel shaft and the hollow block on both sides can make the operation of the tension wheel more stable, the arrangement of the stop ring and the boss between the bearings on both sides can maintain the relative distance of the bearings on both sides to prevent them from approaching each other, and the bearings on both sides can clamp the hollow block, thereby making the installation and sliding of the hollow block more reliable.

[0015] As a further improvement, a shaft shoulder is arranged on the tension wheel shaft, and a side stop ring is arranged at the end of the tension wheel shaft close to the support, and the shaft shoulder and the side stop ring are respectively pressed against the two outer sides of the inner rings of the bearings on both sides.

[0016] The beneficial effect is that the arrangement of the shaft shoulder and the side stop ring to press the bearings on both sides can make the installation of the bearings and the hollow block more reliable and more convenient. After the hollow block, the stop ring and the bearings are installed, only the side stop ring needs to be locked to press the hollow block, the stop ring, the bearings and the tension wheel shaft from one side of the side stop ring at one time, to prevent axial movement, making the installation process of the transmission tensioning device more convenient and efficient, and simplifying the internal structure of the transmission tensioning device.

[0017] As a further improvement, the transmission tensioning device is provided with an elastic adjusting member, one end of the elastic adjusting member is pressed against the support, and the other end is pressed against the outer circumferential surface of the hollow block.

[0018] The beneficial effect is that the arrangement of the elastic adjusting member facilitates the self-adaptive adjustment function of the transmission tensioning device, and the position of the tension wheel shaft can be adjusted according to the tensioning degree of the chain or belt, so that the chain or belt can always maintain a proper tensioning degree.

[0019] As a further improvement, the elastic adjusting member is a spiral spring, the spiral spring is provided with a push rod, the push rod can move along its axial direction in the adjusting long hole under the action of the spiral spring, and a guide hole is arranged on the support to provide guidance for the axial movement of the push rod.

[0020] The beneficial effect is that the structure of the spiral spring is simple and the cost is low, making the structure of the transmission tensioning device more compact, and the arrangement of the push rod can provide support and guidance for the spiral spring, so that the spiral spring can push the hollow block through the push rod without deviation, improving the adjustment effect and stability of the transmission tensioning device.

[0021] As a further improvement, the bracket is provided with a fixing structure for fixing the transmission tensioning device to a set position, and the fixing structure is a through hole distributed in the width direction of the bracket.

[0022] The fixing structure is a through hole, which is convenient for processing and simplifies the structure.

[0023] The technical scheme of the transmission system provided by the application is as follows:

[0024] A transmission system comprises a driving wheel and a driven wheel, a transmission chain or a transmission belt is wound around the driving wheel and the driven wheel, and a transmission tensioning device for adjusting the tension of the transmission chain or the transmission belt is mounted on the transmission system, wherein the transmission tensioning device comprises a bracket, an adjusting long hole is arranged on the bracket, a hollow stop block is slidably mounted in the adjusting long hole, a tensioning wheel shaft is mounted in the hollow stop block, and stop structures are arranged on both sides of the hollow stop block in the axial direction of the tensioning wheel shaft and extend outward and are folded.

[0025] The transmission tensioning device of the transmission system provided by the application is different from the original transmission tensioning device which is provided with a plurality of holes and grooves in multiple directions to mount corresponding structures and support and connect internal components by using bolts. The hollow stop block is slidably mounted in the adjusting long hole of the bracket and has stop structures extending outward and folded on the outer side thereof, and the stop structures are also slidably connected with the two side surfaces of the bracket. Therefore, the hollow stop block can slide in the adjusting long hole of the bracket without deviation or falling off. The hollow stop block drives the tensioning wheel shaft and the tensioning wheel to slide in the adjusting long hole and adjusts the position of the bearing, i.e. The transmission tensioning device reduces the use of bolts and nuts and can achieve firm and reliable sliding through the structure of the hollow stop block itself. The transmission tensioning device avoids the direct contact between the tensioning wheel shaft and the bracket, thereby avoiding wear and tear. The transmission tensioning device provides reliable support and connection for the operation of the bearing on the tensioning wheel shaft and the tensioning wheel, simplifies the installation steps and internal structure of the transmission tensioning device, makes the structure of the transmission tensioning device more compact and simple, and makes the installation of the transmission tensioning device more rapid and efficient.

[0026] As a further improvement, the hollow stop block is a split structure that is combined along the axial direction of the tensioning wheel shaft.

[0027] The beneficial effect is that the hollow block adopts a split structure, the hollow block with a stop structure on the outer side is installed in the adjusting long hole of the support, the internal structure of the transmission tensioning device is further simplified, and the hollow block can be quickly installed without disassembling the support structure.

[0028] As a further improvement, the outer circumferential surface of the hollow block is circular, and the adjusting long hole matches the outer circumferential surface of the hollow block.

[0029] The beneficial effect is that the outer circumferential surface of the hollow block is circular, which can reduce the contact area of the hollow block and the adjusting long hole, thereby reducing the friction force on the hollow block and making the sliding more smooth.

[0030] As a further improvement, bearings are respectively installed between the tensioning wheel shaft and the two sides of the hollow block, a stop ring is arranged between the inner rings of the bearings, a boss is arranged on the hollow block to limit the relative position of the outer rings of the two bearings, the boss is between the two bearings, and the boss is pressed against the outer rings of the two bearings.

[0031] The beneficial effect is that the bearings respectively arranged between the tensioning wheel shaft and the two sides of the hollow block can make the operation of the tensioning wheel more stable, the stop ring and the boss arranged between the two bearings can maintain the relative distance of the two bearings to prevent them from approaching each other, and the two bearings can clamp the hollow block, thereby making the installation and sliding of the hollow block more reliable.

[0032] As a further improvement, a shaft shoulder is arranged on the tensioning wheel shaft, a side stop ring is arranged at the end of the tensioning wheel shaft close to the support, and the shaft shoulder and the side stop ring are pressed against the two outer sides of the inner rings of the two bearings.

[0033] The beneficial effect is that the shaft shoulder and the side stop ring are pressed against the two bearings, which can make the installation of the bearings and the hollow block more reliable and more convenient. After the hollow block, the stop ring, and the bearings are installed, only the side stop ring needs to be locked to press the hollow block, the stop ring, the bearings, and the tensioning wheel shaft from one side of the side stop ring at one time, which prevents axial movement and makes the installation process of the transmission tensioning device more convenient and efficient, and simplifies the internal structure of the transmission tensioning device.

[0034] As a further improvement, the transmission tensioning device is provided with an elastic adjusting member, one end of the elastic adjusting member is pressed against the support, and the other end is pressed against the outer circumferential surface of the hollow block.

[0035] The beneficial effect is that the elastic adjusting member facilitates the self-adaptive adjustment function of the transmission tensioning device, which can adjust the position of the tensioning wheel shaft according to the tensioning degree of the chain or belt, so that the chain or belt can always maintain an appropriate tensioning degree.

[0036] As a further improvement, the elastic adjusting element is a helical spring, the helical spring is provided with a push rod, the push rod can move along its own axis within the adjustment long hole position under the action of the helical spring, and the bracket is provided with a guide hole for guiding the axial movement of the push rod.

[0037] The beneficial effects are: the helical spring has a simple structure and low cost, making the transmission tensioning device more compact. The push rod can provide support and guidance for the helical spring, allowing it to push the hollow stop block without shifting, thus improving the adjustment effect and stability of the transmission tensioning device.

[0038] As a further improvement, the bracket is provided with a fixing structure for fixing the transmission tensioning device in a set position, and the fixing structure is through holes distributed in the width direction of the bracket.

[0039] The beneficial effects are: setting a fixed structure on the bracket facilitates the installation and disassembly of the transmission tensioning device; the fixed structure is a through hole, which is easy to process and simplifies the structure. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the transmission tensioning device in this invention;

[0041] Figure 2 for Figure 1 A sectional view of the transmission tensioning device shown along line AA;

[0042] Figure 3 for Figure 1 A partial sectional view of the transmission tensioning device shown.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Bracket; 2. Hollow stop block; 3. Bearing; 4. Tensioner wheel shaft; 5. Side retaining ring; 6. Stop ring; 7. Tensioner wheel; 8. Baffle; 9. Push rod; 10. Helical spring; 11. Drive chain. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0046] The following detailed description of embodiments of the application in the drawings provided is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based upon the embodiments of the application, all other embodiments that would be obtained by one skilled in the art without having to make inventive efforts are within the scope of the application claimed.

[0047] It should be noted that the relationship terms such as "first" and "second" and the like appearing in the present application are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any actual relationship or sequence between the entities or operations. Moreover, the terms such as "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "including a" and the like do not exclude the process, method, article or device including the elements from the process, method, article or device.

[0048] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" appearing in the present application should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" appearing in the present application should be understood broadly, for example, the object "provided with" can be part of the body, or arranged separately from the body and connected to the body, and the connection can be detachable or non-detachable. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] The present application will be further described in detail below in combination with embodiments.

[0051] Specific embodiment 1 of the transmission tensioning device provided by the present application:

[0052] As Figure 1 , Figure 2As shown, the transmission tensioning device provided by the embodiment comprises a support 1, four through holes are formed in the support 1, and the transmission tensioning device is fixedly connected to a set position of a transmission device through bolts. An adjusting long hole is formed in the support 1, a hollow block 2 is slidingly installed in the adjusting long hole, bearings 3 are installed on both sides of the inside of the hollow block 2, a tension wheel shaft 4 is installed and connected in the bearings 3, and a tension wheel 7 is assembled on the tension wheel shaft 4 and is in pressure contact with a chain. An outwardly extending and folded stop structure is arranged on the outside of the hollow block 2, the stop structure is in sliding contact with the two side surfaces of the support 1, the installation of the hollow block 2 is stable and reliable, the rotation of the bearings 3, the tension wheel shaft 4 and the tension wheel 7 is reliable, and axial deviation of the tension wheel shaft 4 during radial movement is prevented. The hollow block 2 can also avoid direct contact between the tension wheel shaft 4 and the support 1, and prevent long-term sliding friction from causing wear of the tension wheel shaft 4.

[0053] As shown in Figure 2 , Figure 3 , a spring 10 and a push rod 9 inserted in the spring 10 are arranged on the support 1 of the transmission tensioning device to form an elastic adjusting member, one end of the push rod 9 is provided with a matching surface in pressure contact with the hollow block 2, and the other end of the push rod 9 extends into a guide hole formed in the support 1. Thus, the position of the hollow block 2 is changed by the push rod 9 pushed by the spring, and the bearings 3, the tension wheel shaft 4 and the tension wheel 7 are driven to adaptively adjust the tension of the chain.

[0054] As shown in Figure 1 , in the embodiment, one end of the tension wheel shaft 4 is assembled with the tension wheel 7, and the two sides of the tension wheel 7 are pressed by a baffle 8 and a shaft shoulder, so as to prevent axial movement of the tension wheel 7. The baffle 8 is locked on one side of the tension wheel 7 through a fastening bolt screwed into the tension wheel shaft 4, a key groove is arranged on the tension wheel shaft 4, and the rotation of the tension wheel 7 and the tension wheel shaft 4 is achieved by key connection.

[0055] In the embodiment, the hollow block 2 is a symmetrical split structure along the axial direction of the tension wheel shaft 4, a boss is arranged between the bearings 3 on both sides of the hollow block 2, the boss is clamped by the outer rings of the bearings 3, and a stop ring 6 is arranged between the inner rings of the bearings 3. A side stop ring 5 is arranged on one end of the tension wheel shaft 4 close to the bearing 3, and the side stop ring 5 is locked on the bearing 3 through a nut and a gasket, so that the side stop ring 5 is matched with the shaft shoulder on one side of the bearing 3, and the bearings 3, the stop ring 6 and the hollow block 2 are pressed, so as to prevent axial movement of the bearings 3 and the tension wheel shaft 4, and make the installation of the hollow block 2 more stable and reliable. The hollow block 2 adopts a symmetrical split structure along the axial direction of the tension wheel shaft 4, and the support 1 is a whole structure. When assembled, the hollow block 2 is installed into the support 1 step by step, the flexibility of the internal structure of the support 1 is higher, and the hollow block 2 can be clamped through the side stop ring 5, so as to avoid the use of connecting parts such as bolts, reduce the holes and grooves, and simplify the structure of the transmission tensioning device.

[0056] This transmission tensioning device reduces the use of bolts and nuts for connection and installation. It utilizes the hollow stop 2 installed in the adjustment elongated hole of the bracket 1 to complete functions such as sliding adjustment and support connection, which simplifies the structure of the transmission tensioning device and makes it more simple and compact.

[0057] like Figure 1 As shown, during the assembly of the transmission tensioning device, it is preferable to install from left to right. First, assemble the tensioning wheel 7 and the tensioning wheel shaft 4. Then, install the bearing 3 near the tensioning wheel 7 up to the shoulder position. Next, install the retaining ring 6 and part of the hollow stop block 2 near the tensioning wheel 7. Then, install the bracket 1, followed by the remaining part of the hollow stop block 2. Then, install the remaining bearing 3 on the other side. Finally, install the side retaining ring 5 and lock it with washers and nuts. It should be noted that before installing the bracket 1, the coil spring 10 and its push rod 9 need to be pre-pressed into the guide hole of the bracket 1. At the bracket 1, all components can be installed and fixed using only the locked side retaining ring 5, making the installation structure simpler, more compact, and more efficient.

[0058] Specific embodiment 2 of the transmission tensioning device provided by the present invention:

[0059] In Embodiment 1 of the transmission tensioning device of the present invention, the hollow stop 2 is a split structure assembled along the axial direction of the tensioning wheel shaft 4. In this embodiment, the hollow stop 2 is an integral structure, and the bracket 1 is replaced with a split structure with a cut-off adjustment elongated hole and fastening connectors are provided, without affecting the simplicity of the internal structure of the transmission tensioning device.

[0060] Specific embodiment 3 of the transmission tensioning device provided by the present invention:

[0061] In Embodiment 1 of the transmission tensioning device of the present invention, the outer peripheral surface of the hollow stop 2 is circular, and the adjusting elongated hole matches the outer peripheral surface of the hollow stop 2. In this embodiment, the outer peripheral surface of the hollow stop 2 can be set as a square to improve the anti-rotation effect of the hollow stop 2 during sliding, but the increased friction area may slightly reduce the smoothness of its sliding.

[0062] Specific embodiment 4 of the transmission tensioning device provided by the present invention:

[0063] In Embodiment 1 of the transmission tensioning device of the present invention, bearings 3 are respectively installed between the tensioning wheel shaft 4 and both sides of the hollow stop block 2, and a retaining ring 6 is provided between the inner rings of each bearing 3. The hollow stop block 2 is provided with a boss for limiting the relative position of the outer rings of the two bearings 3. The boss is located between the two bearings 3 and the two sides of the boss are pressed against the outer rings of the two bearings 3. In this embodiment, only a single bearing 3 can be used. Correspondingly, it is not necessary to provide a retaining ring 6 and a boss between the two bearings 3. It is sufficient to provide a boss that presses against the outer rings of the bearing 3 on both outer sides of the hollow stop block 2.

[0064] Specific embodiment 5 of the transmission tensioning device provided by the present invention:

[0065] In Embodiment 1 of the transmission tensioning device of the present invention, the elastic adjusting element is a helical spring 10, and the helical spring 10 is provided with a push rod 9. The push rod 9 can move along its own axis within the adjustment elongated hole under the action of the helical spring 10. The bracket 1 is provided with a guide hole for guiding the axial movement of the push rod 9. In this embodiment, the elastic adjusting element can also be a small elastic cylinder or a spring plate. In this case, it is not necessary to provide a push rod 9. The two ends of the small elastic cylinder or spring plate can be fixed and tightened to the inner circumferential surface of the hollow stop block 2 and the adjustment elongated hole of the bracket, respectively.

[0066] Specific embodiment 6 of the transmission tensioning device provided by the present invention:

[0067] In Embodiment 1 of the transmission tensioning device of the present invention, the bracket 1 is provided with a fixing structure for fixing the transmission tensioning device at a set position. The fixing structure is a through hole distributed in the width direction of the bracket 1. In this embodiment, the fixing structure may not be provided, and the bracket 1 may be directly welded to the set position.

[0068] Specific embodiment 1 of the transmission system provided by the present invention:

[0069] The transmission system is a chain drive system, including a driving wheel, a driven wheel, and a transmission chain 11 mounted around the wheel. The chain drive system is equipped with a transmission tensioning device, the structure of which is as follows: Figure 1 , Figure 2 , Figure 3 As shown, the structure is the same as that of Embodiment 1 of the transmission tensioning device of the present invention, and will not be described again here. In other embodiments of the transmission system of the present invention, the transmission tensioning device may also be the structure of other embodiments of the transmission system of the present invention. In this embodiment and other embodiments using the transmission tensioning device of the present invention, the transmission system may also be a belt drive system.

[0070] Finally, it should be noted that the above description is only the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified without creative labor, or some technical features thereof can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drive tensioner comprising a bracket (1) having an adjustment slot formed therein, characterized in that, The hollow block (2) is installed in the adjusting long hole in sliding mode, the tension wheel shaft (4) is installed in the hollow block (2), the hollow block (2) is provided with outwardly extending and folded stop structures on the two sides of the axial direction of the tension wheel shaft (4), and the stop structures are in sliding cooperation with the two side surfaces of the support (1); the hollow block (2) is composed of two parts along the axial direction of the tension wheel shaft (4), a bearing (3) is installed between the tension wheel shaft (4) and each part, each part is provided with an inwardly extending and folded flange at one end towards the adjusting long hole, and the flanges of the two parts are located between the axial directions of the two bearings and are axially pressed by the outer rings of the two bearings (3).

2. A take-up tensioner as described in claim 1, wherein, The outer circumferential surface of the hollow block (2) is circular, and the width of the adjusting long hole is matched with the diameter of the hollow block (2).

3. The drive tensioner of claim 1, wherein, The inner rings of the two bearings (3) are provided with a stop ring (6) therebetween.

4. A take-up tensioner as described in claim 3, wherein, The tension wheel shaft (4) is provided with an axial shoulder, the end of the tension wheel shaft (4) close to the support (1) is provided with a side stop ring (5), and the axial shoulder and the side stop ring (5) are respectively pressed against the two outer sides of the inner rings of the two bearings (3).

5. A take-up tensioner as claimed in any one of claims 1-4, characterized in that The transmission tensioning device is provided with an elastic adjusting member, one end of the elastic adjusting member is abutted against the support (1), and the other end is abutted against the outer circumferential surface of the hollow block (2).

6. A take-up tensioner as described in claim 5, wherein, The elastic adjusting member is a spiral spring (10), the spiral spring (10) is provided with a pushing rod (9), the pushing rod (9) can move along the axial direction of the pushing rod (9) under the action of the spiral spring (10) in the adjusting long hole, and the support (1) is provided with a guide hole for guiding the axial movement of the pushing rod (9).

7. A take-up tensioner as claimed in any one of claims 1-4, characterized in that The support (1) is provided with a fixing structure for fixing and installing the transmission tensioning device at a set position, and the fixing structure is a through hole distributed in the width direction of the support (1).

8. A drive system comprising a driving wheel and a driven wheel, a drive chain (11) or a drive belt being wound around the driving and driven wheels, the drive system being provided with a drive tensioning device for adjusting the tension of the drive chain (11) or the drive belt, characterized in that The transmission tensioning device comprises a support (1), the support (1) is provided with an adjusting long hole, and the adjusting long hole is characterized in that a hollow block (2) is installed in the adjusting long hole in sliding mode, a tension wheel shaft (4) is installed in the hollow block (2), the hollow block (2) is provided with outwardly extending and folded stop structures on the two sides of the axial direction of the tension wheel shaft (4), and the stop structures are in sliding cooperation with the two side surfaces of the support (1); the hollow block (2) is composed of two parts along the axial direction of the tension wheel shaft (4), a bearing (3) is installed between the tension wheel shaft (4) and each part, each part is provided with an inwardly extending and folded flange at one end towards the adjusting long hole, and the flanges of the two parts are located between the axial directions of the two bearings and are axially pressed by the outer rings of the two bearings (3).

9. The transmission system of claim 8, wherein, The outer circumferential surface of the hollow block (2) is circular, and the width of the adjusting long hole is matched with the diameter of the hollow block (2).

10. The transmission system of claim 8, wherein, The inner rings of the two bearings (3) are provided with a stop ring (6) therebetween.

11. The transmission system of claim 10, wherein, The tension wheel shaft (4) is provided with an axial shoulder, the end of the tension wheel shaft (4) close to the support (1) is provided with a side stop ring (5), and the axial shoulder and the side stop ring (5) are respectively pressed against the two outer sides of the inner rings of the two bearings (3).

12. A transmission system according to any one of claims 8 to 11, characterised in that, The transmission tensioning device is equipped with an elastic adjusting member, one end of the elastic adjusting member is in abutment with the support (1), and the other end is in abutment with the outer circumferential surface of the hollow block (2).

13. The transmission system of claim 12, wherein, The elastic adjusting member is a spiral spring (10), the spiral spring (10) is provided with a push rod (9), the push rod (9) can move along the axial direction of the push rod (9) under the action of the spiral spring (10) in the adjusting long hole position, and the support (1) is provided with a guide hole for guiding the axial movement of the push rod (9).

14. A transmission system according to any one of claims 8 to 11, characterised in that, The support (1) is provided with a fixing structure for fixing and installing the transmission tensioning device at a set position, and the fixing structure is a through hole distributed in the width direction of the support (1).

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