Belt tensioning mechanism, belt transmission mechanism and machining equipment

Abstract

The invention discloses a belt tensioning mechanism, a belt transmission mechanism and machining equipment. The belt tensioning mechanism comprises a tensioning belt wheel, a fixing piece, an adjusting piece, a positioning piece and a fastening piece. The fixing piece is fixedly connected with an external rack, and the fixing piece is movably connected with the adjusting piece. The tensioning belt wheel is fixed to the adjusting piece and connected with the belt, and the belt is in transmission connection with the first belt wheel. The fastening piece penetrates through the adjusting piece to abut against the fixing piece and is used for adjusting the distance between the adjusting piece and the fixing piece. When the fastening piece is adjusted to enable the adjusting piece to move and the distance between the adjusting piece and the fixing piece is changed, the tensioning belt wheel moves along with the adjusting piece in the same direction.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission mechanisms, and in particular, to a belt tensioning mechanism, a belt transmission mechanism, and a processing device. Background Art

[0002] A belt transmission mechanism is a commonly used transmission mechanism, which generally includes a driving wheel, a driven wheel, and a belt that is in transmission connection with the driving wheel and the driven wheel. There are various existing belts, including flat belts, V-belts, wedge belts, synchronous belts, and so on. When in use, the driving wheel rotates, and a frictional force is generated between the driving wheel and the belt, driving the belt to rotate, and then driving the driven wheel to rotate. In this process, the belt needs to tension the driving wheel and the driven wheel to ensure that the frictional force is large enough to complete the power transmission. However, after running for a period of time, the belt usually ages and becomes loose, affecting the normal operation of the belt transmission mechanism. To ensure the operation of the belt transmission mechanism, it is usually necessary to replace the entire belt or add an additional belt adjustment mechanism. When replacing the entire belt, the entire structure needs to be disassembled, which is not only time-consuming and laborious but also increases the material cost of replacing the belt. When adding an additional belt adjustment device, many complex connection structures, such as lead screws, motors, cylinders, etc., usually need to be introduced, but this will undoubtedly greatly increase the volume of the corresponding belt transmission structure. It is not suitable for small-sized electrical appliances with requirements for product volume.

[0003] Therefore, how to provide a belt tensioning mechanism and a belt transmission structure with a small and simple structure and convenient adjustment is an urgent problem to be solved. Summary of the Invention

[0004] Belt transmission devices are widely used in the mechanical field, and belts are undoubtedly a crucial component in belt transmission devices. As the number of uses increases, or as the belt itself oxidizes and ages, the belt will gradually become longer, unable to tension the corresponding transmission belt pulley well, thereby affecting the transmission effect. The prior art usually ensures that the belt can tension the belt pulley by replacing the belt or by adding cumbersome accessories such as motors and lead screws, which is neither conducive to cost control nor to the requirements of electrical appliance miniaturization.

[0005] To solve the defects of the prior art, the present invention proposes a belt tensioning mechanism that can be used to adjust the belt so that the belt is always in a tensioned state.

[0006] The belt tensioning mechanism includes a tensioning pulley, a fixing member, an adjusting member, and a fastening member.

[0007] The fixing member is fixedly connected to an external frame, and the fixing member is movably connected to the adjusting member. The tensioning pulley is fixed to the adjusting member. The fastening member passes through the adjusting member and abuts against the fixing member for adjusting the distance between the adjusting member and the fixing member. When the fastening member is adjusted to move the adjusting member and change the distance between the adjusting member and the fixing member, the tensioning pulley moves in the same direction as the adjusting member.

[0008] In an alternative embodiment, the belt tensioning mechanism further has a positioning member. A through hole is provided on the tensioning pulley, and the through hole is located at the center of the tensioning pulley. The positioning member penetrates through the through hole of the tensioning pulley, and the positioning member is fixedly connected to the adjusting member so that the tensioning pulley is fixedly connected to the positioning member.

[0009] In an alternative embodiment, the adjusting member is provided with a first limiting hole and a second limiting hole. The positioning member penetrates through the first limiting hole and the second limiting hole. A limiting block is provided at a first end of the positioning member, and an annular groove is provided at a second end of the positioning member. The size of the limiting block is larger than the size of the first limiting hole.

[0010] In an alternative embodiment, the fixing member is provided with a first sliding hole to allow the positioning member to move within the first sliding hole. The adjusting member is provided with a first limiting hole, and the positioning member passes through the first sliding hole and is fixedly connected to the first limiting hole; a limiting block is provided at a first end of the positioning member, and the aperture of the first limiting hole is not less than the width of the positioning member and less than the width of the limiting block.

[0011] In an alternative embodiment, the fastening member is a fastening screw, and the adjusting member has an adjusting hole. The fastening screw passes through the adjusting hole and abuts against the fixing member. Internal threads are provided on the inner wall of the adjusting hole, and external threads are provided on the fastening screw. The fastening member is threadedly connected to the adjusting member.

[0012] In an alternative embodiment, the adjusting member includes a first adjusting plate, a second adjusting plate, and a third adjusting plate. The first adjusting plate and the second adjusting plate are disposed opposite to each other. The third adjusting plate connects the first adjusting plate and the second adjusting plate. A first limiting hole is provided on the first adjusting plate, a second limiting hole is provided on the second adjusting plate, and an adjusting hole is provided on the third adjusting plate.

[0013] The fixing member further includes a first fixing plate, a second fixing plate, and a third fixing plate. The first fixing plate and the second fixing plate are disposed opposite to each other. The third fixing plate connects the first fixing plate and the second fixing plate. A first sliding hole is provided on the first fixing plate, and a second sliding hole is provided on the second fixing plate.

[0014] In an alternative embodiment, the adjusting member is recessed with a notch, and the fixing plate is protruded with a clamping plate. When the fastener is manipulated to adjust the distance between the adjusting member and the fixing member, the adjusting member rotates around the contact point between the notch and the clamping plate as a fulcrum.

[0015] In an alternative embodiment, the belt tensioning mechanism includes a positioning member. The tensioning pulley is provided with a through hole. The fixing member includes a first fixing plate and a second fixing plate which are oppositely arranged. The first fixing plate is provided with a first sliding hole, and the second fixing plate is provided with a second sliding hole corresponding to the first sliding hole. The adjusting member is movably sleeved on the fixing member. The adjusting member is provided with a first limiting hole, a second limiting hole and an adjusting hole. The first limiting hole and the second limiting hole are oppositely arranged. The positioning member sequentially passes through the first limiting hole, the first sliding hole, the through hole, the second sliding hole and the second limiting hole, so that the tensioning pulley is connected to the fixing member and the adjusting member. The fastener passes through the adjusting hole and abuts against the fixing member.

[0016] When the fastener rotates in a first rotation direction or a second rotation direction opposite to the first rotation direction under the drive of an external force, under the reaction force of the fixing member, the adjusting member moves relative to the fixing member, driving the positioning member to slide in the first sliding hole and the second sliding hole, and further driving the tensioning pulley to move to a preset position.

[0017] The present invention also proposes a belt transmission mechanism, including the above-mentioned belt tensioning mechanism, a belt, a driving wheel, a first driven wheel and a second driven wheel. Wherein, the belt has a smooth surface and a toothed surface, and the toothed surface is in toothed connection with the tensioning pulley. The first driven wheel is arranged opposite to the tensioning pulley. The toothed surface is in toothed connection with the first driven wheel. The second driven wheel and the driving wheel are located between the tensioning pulley and the first driven wheel. The second driven wheel is connected to the smooth surface, and the driving wheel is in toothed connection with the toothed surface.

[0018] The present invention also proposes a processing device, including the above-mentioned belt transmission mechanism.

[0019] In the belt tensioning mechanism of the present invention, the tensioning pulley is fixedly connected to the adjusting member, and the adjusting member is connected to the fixing member. That is, the position of the tensioning pulley is fixed relative to the position of the adjusting member, and the position of the tensioning pulley can be changed relative to the fixing member. When an external force is applied to the fastener to drive the movement of the fastener, since the fixing member is connected to the machine frame, manipulating the movement of the fastener can cause the adjusting member to move relative to the fixing member. Specifically, the position of the fixing member is fixed. Since the fastener abuts against the fixing member, after receiving the force applied by the fastener, the fixing member will apply a reaction force to the adjusting member, driving the adjusting member to move relative to the fixing member and changing the distance between the adjusting member and the fixing member. At the same time, since the tensioning pulley is fixedly connected to the adjusting member, the tensioning pulley moves in the same direction as the adjusting member, causing the position of the tensioning pulley relative to the fixing member to change. When the tensioning pulley is applied to the belt drive mechanism, for example, when the belt is too loose, the fastener can be manipulated to rotate in the first rotation direction, so that the distance between the adjusting member and the fixing member increases, the adjusting member moves away from the fixing member, and the tensioning pulley moves in the same direction as the adjusting member to tighten the belt. When the belt is too tight, the fastener can be manipulated to rotate in the second rotation direction opposite to the first rotation direction, so that the distance between the adjusting member and the fixing member decreases, the adjusting member moves closer to the fixing member, and the tensioning pulley moves in the same direction as the adjusting member to loosen the belt. That is, by manipulating the rotation of the fastener, the belt can always be kept in a tensioned state. Compared with the prior art, the belt tensioning mechanism of the present invention can be applied to different belt drive mechanisms to adjust the tightness of the belt, which can greatly reduce the maintenance cost of users. At the same time, the belt tensioning mechanism of the invention has a simple and compact structure and can be installed on the belt drive mechanism of some small electrical appliances for use, and has a wider application prospect. When the belt tensioning mechanism of the present invention is installed on the belt drive mechanism of the present invention, the tensioning pulley is connected to the belt for transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the mechanisms shown in these drawings.

[0021] Figure 1 It is a schematic structural diagram of the belt tensioning mechanism provided by the embodiment of the present invention.

[0022] Figure 2This is another schematic structural view of the belt tensioning mechanism provided by the embodiments of the present invention.

[0023] Figure 3 This is a side view of the belt tensioning mechanism provided by the embodiments of the present invention.

[0024] Figure 4 This is an exploded view of the belt tensioning mechanism provided by the embodiments of the present invention.

[0025] Figure 5 This is a schematic structural view of the belt transmission mechanism provided by the embodiments of the present invention. Specific Embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the protection scope of the present invention.

[0027] The mention of "embodiments" in this document means that the specific features, structures, or characteristics described in conjunction with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] See Figures 1-4 , the present invention provides a belt tensioning mechanism 100, which can be used to adjust the belt so that the belt is always in a tensioned state.

[0029] The belt tensioning mechanism 100 includes a tensioning pulley 110, a fixing member 120, an adjusting member 140, a positioning member 130, and a fastening member 150. The belt tensioning mechanism includes a tensioning pulley 110, a fixing member 120, an adjusting member 140, a positioning member 130, and a fastening member 150. The fixing member 120 is fixedly connected to an external frame, and the fixing member 120 is movably connected to the adjusting member 140. The tensioning pulley 110 is fixed to the adjusting member 140, the tensioning pulley 110 is connected to the belt, and the belt is in transmission connection with the first pulley. The fastening member 150 passes through the adjusting member 140 and abuts against the fixing member 120 for adjusting the distance between the adjusting member 140 and the fixing member 120. When the fastening member 150 is adjusted to move the adjusting member 140 and change the distance between the adjusting member 140 and the fixing member 120, the tensioning pulley 110 moves in the same direction as the adjusting member 140.

[0030] In the belt tensioning mechanism of the present invention, the tensioning pulley 110 is fixedly connected to the adjusting member 140, and the adjusting member 140 is movably connected to the fixing member 120. That is, the position of the tensioning pulley 110 is fixed relative to the position of the adjusting member 140, and the position of the tensioning pulley 110 can be changed relative to the fixing member 120. When an external force is applied to the fastener 150 to drive the movement of the fastener 150, since the fixing member 120 is connected to the frame, manipulating the movement of the fastener 150 can cause the adjusting member 140 to move relative to the fixing member 120. Specifically, the position of the fixing member 120 is fixed. Since the fastener 150 abuts against the fixing member 120, after receiving the force applied by the fastener 150, the fixing member 120 will apply a reaction force to the adjusting member 140, driving the adjusting member 140 to move relative to the fixing member 120 and changing the distance between the adjusting member 140 and the fixing member 120. At the same time, since the tensioning pulley 110 is fixedly connected to the adjusting member 140, the tensioning pulley 110 moves in the same direction as the adjusting member 140, causing the position of the tensioning pulley 110 relative to the fixing member 120 to change. When the tensioning pulley 110 is applied to a belt drive mechanism, for example, when the belt is too loose, the fastener 150 can be manipulated to rotate in the first rotation direction, so that the distance between the adjusting member 140 and the fixing member 120 increases, the adjusting member 140 moves away from the fixing member 120, and the tensioning pulley 110 moves in the same direction as the adjusting member 140 to tighten the belt. When the belt is too tight, the fastener 150 can be manipulated to rotate in the second rotation direction opposite to the first rotation direction, so that the distance between the adjusting member 140 and the fixing member 120 decreases, the adjusting member 140 approaches the belt, and the tensioning pulley 110 moves in the same direction as the adjusting member 140 to loosen the belt. That is, by manipulating the rotation of the fastener 150, the belt can always be kept in a tensioned state. Compared with the prior art, the belt tensioning mechanism of the present invention can be applied to different belt drive mechanisms to adjust the tightness of the belt, which can greatly reduce the maintenance cost of users. At the same time, the structure 100 of the invented belt tensioning mechanism is simple and compact, and can be installed on the belt drive mechanism of some small appliances for use, with a wider application prospect.

[0031] In an alternative embodiment, the tension pulley 110 is provided with a through hole 111. The through hole 111 is located at the center of the tension pulley. The fixing member 120 further includes a first fixing plate 121, a second fixing plate 122, and a third fixing plate 123. The first fixing plate 121 and the second fixing plate 123 are disposed opposite to each other. The third fixing plate 123 connects the first fixing plate 121 and the second fixing plate 122, and the angles between the third fixing plate 123 and the first fixing plate 121, the second fixing plate 122 are both 90 degrees. The first fixing plate is provided with a first sliding hole 124, and the second fixing plate is provided with a second sliding hole 125 corresponding to the first sliding hole 124. The adjusting member 140 includes a first adjusting plate 141, a second adjusting plate 142, and a third adjusting plate 143. The first adjusting plate 141 and the second adjusting plate 142 are disposed opposite to each other. The third adjusting plate 143 connects the first adjusting plate 141 and the second adjusting plate 142, and the angles between the third adjusting plate 143 and the first adjusting plate 141, the second adjusting plate 142 are both 90 degrees. With this arrangement, the adjusting member 140 is sleeved on the fixing member in parallel, and the third fixing plate 123 and the third adjusting plate 143 are also parallel. In this way, when the fastener 150 is inserted into the adjusting member 140 from the third limiting hole 146 on the third fixing plate 123 and abuts against the third fixing plate 123, the fastener perpendicularly abuts against the third fixing plate 123. When an external force drives the fastener 150 to rotate in the first rotation direction or the second rotation direction, the thrust of the fastener 150 can be transmitted to the fixing member 120 to the greatest extent and evenly. The greater the thrust received by the fixing member 120, the greater the reaction force generated, and the easier it is to push the adjusting member, so that the distance between the third fixing plate 123 and the third adjusting plate 143 increases or decreases, that is, the distance between the adjusting member and the fixing member increases or decreases. When it is necessary to adjust the position of the tension pulley 110, it is not necessary to apply a large external force to drive the rotation of the fastener, and then the position adjustment of the tension pulley can be completed.

[0032] The first adjusting plate 141 is provided with a first limiting hole 144, and the second adjusting plate is provided with a second limiting hole 145 corresponding to the first adjusting hole. The third adjusting plate is provided with an adjusting hole 146. The fastener 150 passes through the adjusting hole 146 and abuts against the fixing member 120. The adjusting member 140 is sleeved on the fixing member 120. The first limiting hole 144 and the second limiting hole 145 are disposed opposite to each other. The positioning member 130 sequentially passes through the first limiting hole 144, the first sliding hole 124, the through hole 111, the second sliding hole 125, and the second limiting hole 145, so that the tension pulley 110 is connected to the adjusting member 140 and the fixing member 120 as a whole through the positioning member 130. The positioning member can slide in the first sliding hole 124 and the second sliding hole 125 to drive the tension pulley 110 to slide.

[0033] In this embodiment, the positioning member 130 can move along the first sliding hole 124 and the second sliding hole 125. Therefore, the tension pulley 110 is movably connected to the fixing member 120. Since the positioning member 130 is fixedly connected to the adjusting member 140, the first limiting hole 144 and the second limiting hole 145 provided on the adjusting member 140 need to limit the movement of the positioning member 130. It can be understood that the lengths of the first limiting hole 144 and the second limiting hole 145 must be less than the lengths of the first sliding hole 124 and the second sliding hole 125. In this way, the positioning member 130 is movable relative to the fixing member 120, while the position of the positioning member 130 is fixed relative to the adjusting member 140.

[0034] To ensure that the positioning member can be fixedly connected to the adjusting member 140, in an alternative embodiment, the first end of the positioning member 130 has a limiting block 131 with a width greater than that of the first limiting hole 144, and an annular groove is provided on the second end of the positioning member 130. The positioning member 130 is a positioning post, and the width of the limiting block 131 is greater than the width of the positioning post and the width of the limiting block 131 is greater than the aperture of the first limiting hole 144. Therefore, when the positioning member 130 is inserted into the second limiting hole 144, the limiting block 131 can abut against the first adjusting plate 141 to prevent the positioning member 130 from continuing to move out of the first adjusting plate 141. Then, the user can snap the clamping member 133 into the annular groove 132. The diameter of the clamping member 133 is greater than the width of the positioning member 130. After the clamping member 133 is snapped into the annular groove 132, the clamping member 133 extends beyond the positioning member 130 and abuts against the outside of the second adjusting plate 142. Therefore, the positioning member 130 cannot be pulled out either. Thus, the positioning member 130 can be fixedly connected to the adjusting member 140, so that the tension pulley 110 is fixedly connected to the adjusting member 140.

[0035] Since the width of the limiting block 131 is greater than the width of the positioning member 130, when it is necessary to disassemble the tension pulley 110, the user can first remove the clamping member 133 from the annular groove 132. Then, the user can directly hold the limiting block 131 and then drag the limiting block 131. The movement of the limiting block 131 drives the entire positioning member 130 to move out of the tension pulley 110, and then the tension pulley 110 can be disassembled.

[0036] To facilitate the user's grip, in an alternative embodiment, the limiting block 131 is cylindrical, and the grip feel is better. Of course, the limiting block 131 can also be other shapes that are convenient to grip, such as spherical, ellipsoidal, oval, square with chamfers, etc. There is no limitation here, as long as the user can hold the limiting block 131 and can correspondingly drag the positioning member 130.

[0037] In this embodiment, the positioning member 130 and the limiting block 131 can be integrally formed, which is convenient for processing and production. Alternatively, the positioning member 130 and the limiting block 131 can also be two separate structures, which is not limited herein.

[0038] Of course, in other embodiments, the positioning member 130 may not be provided with the annular groove 132, but the limiting function can be achieved through other structures. For example, a blind hole can be provided on the positioning member 130, and the positioning member 130 can be limited by screwing a screw into the blind hole and abutting against the second adjusting plate 142, which is not limited herein.

[0039] In the belt tensioning mechanism 100 of the present invention, the positioning member 130 sequentially passes through the first sliding hole 124, the through hole 111, and the second sliding hole 125, so that the tensioning pulley 110 is limited between the first fixing plate 121 and the second fixing plate 122. It should be noted that since the tensioning pulley 110 needs to be connected to a belt transmission mechanism and needs to rotate as the belt moves, a certain distance needs to be reserved between the tensioning pulley 110 and the first fixing plate 121 and the second fixing plate 122 to ensure the smooth rotation of the tensioning pulley 110. Therefore, the distance between the first fixing plate 121 and the second fixing plate 122 needs to be slightly greater than the height of the tensioning pulley 110. At the same time, an annular buffer member is convexly provided on the end face of the tensioning pulley 110. The tensioning pulley 110 is arranged between the first fixing plate and the second fixing plate, and by providing a buffer member on the end face, the frictional loss during the rotation of the tensioning pulley can be reduced, and the service life of the tensioning pulley 110 can be improved.

[0040] In an alternative embodiment, the first sliding hole 124 and the second sliding hole 125 are arranged in parallel and symmetrically, ensuring that the positioning member 130 can be vertically arranged relative to the horizontal plane, so as to ensure the smooth rotation of the tensioning pulley 110. In a preferred embodiment, the first sliding hole 124 and the second sliding hole 125 have the same size, which is more conducive to standardized production. Of course, in other embodiments, the sizes of the first sliding hole 124 and the second sliding hole 125 can also be different. For example, the lengths of the first sliding hole 124 and the second sliding hole 125 can be different, as long as it is ensured that the first sliding hole 124 and the second sliding hole 125 can stably hold the positioning member 130, which is not limited herein.

[0041] In an alternative embodiment, the apertures of the first limiting hole 144 and the second limiting hole 145 are not less than the width of the positioning member 130. Since the first limiting hole and the second limiting hole limit the positioning member 130, the positioning member 130 is fixedly connected to the adjusting key 140. Therefore, the aperture of one of the first limiting hole 144 and the second limiting hole 145 is equal to the width of the positioning member 130, so that the positioning member 130 does not shake and the position of the positioning member 130 is fixed relative to the adjusting member 140. The aperture of the other of the first limiting hole 144 and the second limiting hole 145 only needs to be not less than the width of the positioning member 130, so as to allow the positioning member 130 to pass through the first limiting hole 144 and the second limiting hole 145 and be fixedly connected to the adjusting member 140. In a preferred embodiment, the apertures of the first limiting hole 144 and the second limiting hole 145 are equal to the width of the positioning member, which is more conducive to production and processing, and at the same time makes the inner walls of the first limiting hole 144, the through hole 111 and the second limiting hole 145 abut against the positioning member 130. In this way, when the positioning member 130 penetrates into the first through hole 111, there is no gap between the positioning member 130 and the through hole 111, and the tension pulley 110 can be fixedly connected to the positioning member 130, and there will be no collision between the tension pulley 110 and the positioning member 130 to affect the rotation effect of the tension pulley 110, so that the tension pulley 110 can rotate smoothly. Therefore, when the fastener is rotated in the first rotation direction or the second rotation direction to move the adjusting member 140, during the movement of the adjusting member 140, the position of the adjusting member 140 remains unchanged relative to the positioning member 130, and the reaction force of the fixing member 100 on the adjusting member 140 will not be greatly lost, and the adjusting member 140 can move stably to adjust the distance between the third fixing plate 123 and the third adjusting plate 143, thereby adjusting the position of the tension pulley 110.

[0042] In an alternative embodiment, the fastener 150 abuts against the inner wall of the adjusting hole 146. Therefore, during the rotation of the fastener 150, the fastener 150 does not shake and can be stably connected in the adjusting hole 146, making the operation of rotating the fastener 150 more convenient and fast. At the same time, since the fastener does not shake, less external force is lost on the fastener 150, enabling the user to more easily complete the position adjustment of the tension gear 110.

[0043] In an alternative embodiment, the fastener 150 is a fastening screw. An internal thread is provided on the inner wall of the adjustment hole 146, and an external thread is provided on the fastening screw. The fastener 150 is threadedly connected to the adjusting member 140. This arrangement makes the connection between the fastener 150 and the adjusting member 140 more stable. In other embodiments, the fastener may also have other structures. For example, the fastener may be a screw rod provided with a plurality of annular grooves, and a card that engages with the grooves may be provided on the inner wall of the adjustment hole. The fastener may be engaged and connected with the fastener. When the position needs to be adjusted, the fastener can also be rotated to adjust the position of the tension pulley 110. This is not limited herein as long as the structure of the fastener can support it to complete the position adjustment of the tension pulley 110.

[0044] In an alternative embodiment, a notch 147 is provided on the third positioning member 130, and a clamping plate 128 is provided by bending and extending outward from the third fixing plate 123. When the fastener 150 is manipulated to adjust the distance between the adjusting member 140 and the fixing member 120, the adjusting member 140 rotates around the contact point between the notch and the clamping plate as a fulcrum. The clamping plate 128 cooperates with the notch 147 to guide the fastener. In addition, during the rotation of the fastener, the clamping plate 128 is stuck in the notch 147. The design of this structure increases the structural strength of the adjusting member 140 and the fixing member 120 on the one hand, and increases the stability of the connection between the adjusting member 140 and the fixing member 120 on the other hand, making the distribution of the acting force between the two more balanced. At the same time, the clamping plate 128 can also play a limiting role and prevent the adjusting member 140 from shaking during the movement.

[0045] In an alternative embodiment, the belt tensioning mechanism 100 further includes at least one connecting member 160. One end of the first fixing plate 121 and / or one end of the second fixing plate 122 extends outward to form a connecting plate 126, and at least one connecting hole 127 is provided on the connecting plate 126. The connecting member 160 passes through the connecting hole 127, and the connecting member 160 is used to connect the adjusting plate to an external frame.

[0046] The connecting plate 126 is used to mount the fixing member 120 onto the mounting surface of a corresponding device, such as the mounting surface of the aforementioned rack. In this embodiment, only one connecting plate 126 may be provided, and the connecting plate 126 may be provided at one end of the first fixing plate 121 or at one end of the second fixing plate 122. The connection relationships among the tension pulley 110, the fixing member 120, and the adjusting member 140 of the present invention are stable. Therefore, only one connecting plate 126 is needed to stably mount the belt tensioning mechanism 100 onto a mounting surface to complete the fixation of the fixing member. At the same time, it can be understood that there may also be two connecting plates 126, which are respectively provided at one end of the first fixing plate 121 and at one end of the second fixing plate 122. The provision of the two connecting plates 126 can make the force distribution of the belt tensioning mechanism 100 more balanced and make the connection between the fixing member and the mounting surface more stable. It can also be understood that only one connection hole 127 may be provided on the connecting plate 126 or multiple connection holes 127 may be provided. Providing one connection hole 127 is sufficient to complete the fixation of the connecting plate 126, but providing multiple connection holes 127 can make the connection between the connecting plate 126 and the mounting surface more stable. In one embodiment, each connecting plate 126 is provided with two connection holes 127. Of course, the number of connection holes 127 may also be other numbers, which are not limited herein.

[0047] In an alternative embodiment, the connecting member 160 may be structures such as screws and bolts, which are not limited herein.

[0048] In an alternative embodiment, the fixing member 120, the positioning member 130, and the adjusting member 140 are all integrally formed structures, which are structurally stable and are also convenient for large-scale production and manufacturing.

[0049] In some embodiments, a belt drive mechanism is also disclosed, which includes the aforementioned belt tensioning mechanism 100, a belt, and a driving pulley. The driving pulley is disposed opposite to the tension pulley 110. The tension pulley, the driving pulley, and the belt are in transmission connection. In the embodiment, the tension pulley 110 can be understood as a driven pulley whose position can change. When it is necessary to adjust the tightness of the belt, the fastener can be manipulated so that the tension pulley moves along with the adjusting member 140, thereby tensioning the belt with the tension pulley 110 and the driving pulley.

[0050] See Figure 5 , in some embodiments, a belt drive mechanism 200 is also disclosed, which includes the aforementioned belt tensioning mechanism 100, a belt 210, a first pulley, a second pulley, and a third pulley. The belt 210 is in transmission connection with the belt tensioning mechanism 100, the first pulley, the second pulley, and the third pulley.

[0051] In an alternative embodiment, the second pulley is disposed opposite to the tension pulley 110. Specifically, the second pulley can be a driving pulley or a driven pulley. When the second pulley is a driving pulley, the first pulley and the third pulley are both driven pulleys. When the second pulley is a driven pulley, one of the first pulley and the third pulley is a driving pulley. Preferably, the second pulley disposed opposite to the tension pulley 110 is the first driven pulley 230. The first pulley disposed between the second pulley 230 and the tension pulley 110 is the driving pulley 220. The third pulley is the second driven pulley 240. When the driving pulley 220 rotates, it drives the belt 210 to rotate, and then drives the first driven pulley 230, the second driven pulley 240 and the tension pulley 110 to rotate. The tension pulley 110 can move within the length range of the first sliding hole 124 and the second sliding hole 125 to ensure that the belt 210 is always tensioned.

[0052] In an alternative embodiment, the belt 210 has a smooth surface and a toothed surface 211, and the toothed surface 211 is in tooth connection with the tension pulley 110. The first driven pulley 230 is disposed opposite to the tension pulley 110. The toothed surface 211 is in tooth connection with the first driven pulley 230. The second driven pulley 240 and the driving pulley 210 are located between the tension pulley 110 and the first driven pulley 230. The second driven pulley 240 is connected to the smooth surface, and the driving pulley is in tooth connection with the toothed surface 211.

[0053] When the belt tensioning mechanism 100 of the present invention is installed on the belt transmission mechanism 200 of the present invention, the tension pulley 110 is in belt transmission connection. When the belt cannot maintain tension with the driving pulley 220, the first driven pulley 230, the second driven pulley 240 and the tension pulley 110, the user needs to determine whether the belt is too loose or too tight. If the belt is too loose, the user can rotate the fastener 150 in the first rotation direction to increase the distance between the third fixing plate 123 and the third adjusting plate 143, that is, move the adjusting member 140 away from the belt 210. The tension pulley 110 moves in the same direction as the adjusting member 140. Since the belt 210 is in transmission connection with the tension pulley 110, when the tension pulley 110 moves, the belt 210 is also driven to be tightened. When the belt is too loose, the user can rotate the fastener in the second rotation direction to decrease the distance between the third fixing plate 123 and the third adjusting plate, that is, move the adjusting member 140 closer to the belt 210. The tension pulley 110 moves in the same direction as the adjusting member 140, so the belt 210 can be loosened.

[0054] Some embodiments of the present invention also disclose a processing device, including a frame and the above-mentioned belt transmission mechanism 200. Since the fixing member is fixedly connected to the frame, the belt tensioning mechanism can be installed on the processing device. After installation, according to the structural setting of the belt transmission mechanism, the adjusting member 140 is relatively located on the outside of the processing device. The fastener is connected to the adjusting member, so when the tightness of the belt 210 needs to be adjusted, there is no need to disassemble the processing device, and the tightness of the belt 210 can be adjusted by rotating the fastener. The operation is convenient and quick, which can reduce the maintenance cost and money cost of the user.

[0055] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, shall be included in the scope of protection of the present invention.

Claims

1. A belt tensioning mechanism, characterized in that, Including: A tension pulley, a fixing member, an adjusting member, and a fastening member; The fixing member is fixedly connected to an external frame, and the fixing member is movably connected to the adjusting member. The tension pulley is fixed to the adjusting member, and the fastening member passes through the adjusting member and abuts against the fixing member to adjust the distance between the adjusting member and the fixing member. When adjusting the fastening member to move the adjusting member and change the distance between the adjusting member and the fixing member, the tension pulley moves in the same direction as the adjusting member.

2. The belt tensioning mechanism according to claim 1, characterized in that, There is also a positioning member. A through hole is provided on the tension pulley, and the through hole is located at the center of the tension pulley. The positioning member penetrates the tension pulley from the through hole of the tension pulley, and the positioning member is fixedly connected to the adjusting member so that the tension pulley is fixedly connected to the positioning member.

3. The belt tensioning mechanism according to claim 2, characterized in that, The adjusting member is provided with a first limiting hole, the positioning member penetrates the first limiting hole, a limiting block is provided at the first end of the positioning member, and an annular groove is provided at the second end of the positioning member. The width of the limiting block is greater than the aperture of the first limiting hole.

4. The belt tensioning mechanism according to claim 2, characterized in that, The fixing member is provided with a first sliding hole to allow the positioning member to move in the first sliding hole. The adjusting member is provided with a first limiting hole, and the positioning member passes through the first sliding hole and is fixedly connected to the first limiting hole; a limiting block is provided at the first end of the positioning member, and the aperture of the first limiting hole is not less than the width of the positioning member and less than the width of the limiting block.

5. The belt tensioning mechanism according to claim 1, characterized in that, The fastening member is a fastening screw. The adjusting member has an adjusting hole. The fastening screw passes through the adjusting hole and abuts against the fixing member. Internal threads are provided on the inner wall of the adjusting hole, and external threads are provided on the fastening screw. The fastening member is threadedly connected to the adjusting member.

6. The belt tensioning mechanism according to claim 1, characterized in that, The adjusting member includes a first adjusting plate, a second adjusting plate, and a third adjusting plate. The first adjusting plate and the second adjusting plate are arranged opposite to each other. The third adjusting plate connects the first adjusting plate and the second adjusting plate. A first limiting hole is provided on the first adjusting plate, a second limiting hole is provided on the second adjusting plate, and an adjusting hole is provided on the third adjusting plate. The fixing member further includes a first fixing plate, a second fixing plate, and a third fixing plate. The first fixing plate and the second fixing plate are arranged opposite to each other. The third fixing plate connects the first fixing plate and the second fixing plate. A first sliding hole is provided on the first fixing plate, and a second sliding hole is provided on the second fixing plate.

7. The belt tensioning mechanism according to claim 1 or 6, characterized in that, The adjusting member is recessed with a notch, and the fixing plate is protruded with a clamping plate. When operating the fastening member to adjust the distance between the adjusting member and the fixing member, the adjusting member rotates around the contact point between the notch and the clamping plate as a fulcrum.

8. The belt tensioning mechanism according to claim 1, characterized in that, The belt tensioning mechanism includes a positioning member. A through hole is provided on the tension pulley. The fixing member includes a first fixing plate and a second fixing plate arranged opposite to each other. A first sliding hole is provided on the first fixing plate, and a second sliding hole corresponding to the first sliding hole is provided on the second fixing plate. The adjusting member is movably sleeved on the fixing member. The adjusting member is provided with a first limiting hole, a second limiting hole, and an adjusting hole. The first limiting hole and the second limiting hole are arranged opposite to each other. The positioning member sequentially passes through the first limiting hole, the first sliding hole, the through hole, the second sliding hole and the second limiting hole, so that the tension pulley is connected to the fixing member and the adjusting member. The fastening member passes through the adjusting hole and abuts against the fixing member. When the fastening member rotates in a first rotation direction or a second rotation direction opposite to the first rotation direction under the drive of an external force, under the reaction force of the fixing member, the adjusting member moves relative to the fixing member, driving the positioning member to slide in the first sliding hole and the second sliding hole, and further driving the tension pulley to move to a preset position.

9. A belt drive mechanism, comprising the belt tensioning mechanism according to claims 1 - 8, characterized in that, It further includes a belt, a driving wheel, a first driven wheel and a second driven wheel. Wherein, the belt has a smooth surface and a toothed surface. The toothed surface is connected to the teeth of the tension pulley. The first driven wheel is arranged opposite to the tension pulley, and the toothed surface is connected to the teeth of the first driven wheel. The second driven wheel and the driving wheel are located between the tension pulley and the first driven wheel. The second driven wheel is connected to the smooth surface, and the driving wheel is connected to the toothed surface by teeth.

10. A processing device, characterized in that, It includes the belt transmission mechanism as described in claim 9.

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