Belt tension adjusting device

Abstract

The utility model relates to automobile electric power steering equipment technical field, especially a kind of belt tension adjusting device. Belt tension adjusting device is used to adjust the tension of belt in belt drive system, and belt drive system includes detachably connected first module and second module, and belt is wound around the first pulley of first module and the second pulley of second module. Belt tension adjusting device includes: base, first positioning mechanism, second positioning mechanism and traction mechanism;First positioning mechanism is used to position first module;Second positioning mechanism is used to position second module, and at least one of first positioning mechanism and second positioning mechanism is movable positioning mechanism that can be moved relative to base;Traction mechanism is installed on base, and the output end of traction mechanism is connected to movable positioning mechanism, so that the spacing between first pulley and second pulley is adjustable. The belt tension adjusting device is simple and convenient to operate, and improves the quality and work efficiency of product.

Description

Technical Field

[0001] This utility model relates to the field of belt tension adjustment technology, and in particular to a belt tension adjustment device. Background Technology

[0002] The electric power steering (EPS) system for automobiles includes a belt drive system. This system comprises a detachably connected first module and a second module. The first module includes a motor and a first pulley connected to the motor's output. The second module includes a second pulley and a drive shaft connected to the second pulley. A belt winds around both the first and second pulleys, thus transmitting power between the motor and the drive shaft. The second module includes a connecting portion with a slotted hole. The first module has a connecting hole. Threaded fasteners pass through the slotted hole and are threaded into the connecting hole. The distance between the first pulley of the first module and the second pulley of the second module is adjusted by regulating the relative position of the threaded fasteners within the slotted hole, thereby adjusting the tension of the belt winding around the first and second pulleys. To ensure transmission efficiency and the reliability of the belt drive system, the belt must be installed onto the pulleys and a specified initial tension applied before the EPS equipment leaves the factory.

[0003] In existing technologies, when manually assembling a belt, the first and second modules must first be fixed, then the belt is fitted onto one of the pulleys, and the other end is hooked onto the other pulley. The pulleys are then slowly rotated, using friction to gradually fit the belt onto the other pulley. However, often friction alone is insufficient to fit the belt onto the pulley; a screwdriver or other auxiliary tool is needed to "pull" the belt outwards. However, these tools can easily damage the belt, affecting transmission efficiency, and are time-consuming, labor-intensive, inefficient, and of questionable quality. Furthermore, while the first and second modules are fixed using threaded fasteners connected to the connecting holes via slotted holes, this method, while allowing the belt to be adjusted to its initial tension, makes it difficult to ensure the uniformity of the relative postures of the first and second modules, thus compromising the consistency of the belt drive system.

[0004] Therefore, there is an urgent need to provide a belt tension adjustment device to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a belt tension adjustment device that is simple and convenient to operate, and improves product quality and work efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The belt tension adjusting device provided by this utility model is used to adjust the belt tension in a belt drive system. The belt drive system includes a detachably connected first module and a second module. The first module includes a first pulley, and the second module includes a second pulley. The belt is wound around the first pulley and the second pulley. The belt tension adjusting device includes:

[0008] Base;

[0009] A first positioning mechanism is used to position the first module;

[0010] A second positioning mechanism is used to position the second module; at least one of the first positioning mechanism and the second positioning mechanism is a movable positioning mechanism that can move relative to the base.

[0011] A traction mechanism is mounted on the base, and the output end of the traction mechanism is connected to the movable positioning mechanism so that the distance between the first pulley and the second pulley is adjustable.

[0012] As an alternative, the second positioning mechanism has a second groove configured to snap-fit ​​and fix the second module.

[0013] As an alternative, the second module includes a connecting portion that extends to the first module and is used for detachable connection with the first module;

[0014] The second groove has a notch on its sidewall facing the first positioning mechanism. The notch is used to avoid the connecting part and / or the first positioning mechanism and / or the first module.

[0015] As an optional solution, the second positioning mechanism is provided with an observation port, which communicates with the second groove and is located at the bottom of the side wall of the second groove. The observation port is configured to observe whether the second module is installed in place.

[0016] As an alternative, the first positioning mechanism has a first groove, which is configured to snap and fix the first module.

[0017] As an alternative, the traction mechanism includes a bracket, a lead screw, a nut seat, and a connector. The bracket is fixed to the base, the lead screw is rotatably mounted on the bracket, the nut seat is threadedly connected to the lead screw, and the movable positioning mechanism is connected to the nut seat.

[0018] As an optional solution, the traction mechanism further includes a first guide member and a second guide member. The first guide member is arranged parallel to the lead screw. One of the first guide member and the second guide member is connected to the bracket, and the other is connected to the connecting member. The first guide member and the second guide member are in sliding engagement; and / or

[0019] One end of the lead screw is connected to a handwheel, which is configured to drive the lead screw to rotate.

[0020] As an optional solution, the belt tension adjustment device further includes a third guide and a fourth guide. The third guide is arranged parallel to the lead screw. One of the third guide and the fourth guide is connected to the base, and the other is connected to the first positioning mechanism. The third guide and the fourth guide are in sliding engagement.

[0021] As an alternative, the bracket is provided with scale markings for marking the position of the nut seat and / or the rotation angle of the lead screw.

[0022] As an optional solution, the belt tension adjustment device also includes a tension detection mechanism for detecting the belt tension.

[0023] The beneficial effects of this utility model are:

[0024] The belt tension adjustment device provided by this utility model includes a first positioning mechanism, a second positioning mechanism, and a traction mechanism. When adjusting the belt tension in a belt drive system, the first and second positioning mechanisms respectively fix the first and second modules. Operating the traction mechanism moves the movable positioning mechanism, causing the first and second modules to move away from or closer to each other, thereby adjusting the belt tension to a preset initial tension. During belt tension adjustment, the first and second positioning mechanisms respectively position the first and second modules. On one hand, adjusting the belt tension only requires operating the traction mechanism, making the adjustment simple and convenient, thus improving work efficiency. On the other hand, the uniform relative posture of the first and second modules ensures the belt tension can be adjusted to the preset initial tension, which helps maintain the consistency of the entire belt drive system. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the belt tension adjustment device with a belt drive system provided in this embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the belt tension adjustment device provided in this embodiment of the utility model. Attached Figure Description

[0028] 1. Base;

[0029] 2. First positioning mechanism; 21. First groove; 22. First base plate; 23. First seat;

[0030] 3. First module; 30. Motor; 31. First pulley;

[0031] 4. Second positioning mechanism; 41. Second groove; 42. Notch; 43. Observation port; 44. Second base plate; 45. Second seat;

[0032] 5. Second module; 50. Housing; 51. Second pulley; 52. Connecting part; 521. Waist-shaped hole; 53. Drive shaft;

[0033] 6. Belt;

[0034] 7. Traction mechanism; 71. Bracket; 72. Lead screw; 73. Nut seat; 74. Connecting component; 75. First guide component; 76. Second guide component; 77. Handwheel;

[0035] 8. Third guide component; 9. Fourth guide component. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] like Figures 1 to 2 As shown, this embodiment provides a belt tension adjustment device, which is used to adjust the tension of belt 6 in the belt drive system.

[0041] In this embodiment, the belt drive system is part of the EPS equipment, specifically, as follows: Figure 1 As shown, the belt drive system includes a detachably connected first module 3 and a second module 5. The first module 3 includes a motor 30 and a first pulley 31. The first pulley 31 is connected to the output shaft of the motor 30, and the motor 30 can drive the first pulley 31 to rotate. A connection hole (not shown in the figure) is provided on the motor housing. The second module 5 includes a second pulley 51, a drive shaft 53, and a housing 50. The housing 50 includes a connecting part 52. The drive shaft 53 is rotatably mounted on the housing 50. The second pulley 51 is mounted on the drive shaft 53 and drives the drive shaft 53 through the second pulley 51. The connecting part 52 of the housing 50 extends to the first module 3 for detachable connection with the first module 3. Specifically, the connecting part 52 has a slotted hole 521. A threaded fastener (not shown in the figure) passes through the slotted hole 521 and is threaded into the connecting hole, thereby fixing the first module 3 and the second module 5. The belt drive system also includes a belt 6, which is wound around a first pulley 31 and a second pulley 51, thereby transmitting the rotation output from the motor 30 to the drive shaft 53. The tension of the belt 6 can be adjusted by adjusting the connection position of the connecting part 52 relative to the motor housing. Specifically, to adjust the tension of the belt 6, simply loosen the threaded fasteners.

[0042] like Figure 1 and Figure 2As shown, the belt tension adjustment device includes a base 1, a first positioning mechanism 2, a second positioning mechanism 4, and a traction mechanism 7. The first positioning mechanism 2 is used to position the first module 3; the second positioning mechanism 4 is used to position the second module 5. At least one of the first positioning mechanism 2 and the second positioning mechanism 4 is a movable positioning mechanism that can move relative to the base 1. The traction mechanism 7 is installed on the base 1, and the output end of the traction mechanism 7 is connected to the movable positioning mechanism so that the distance between the first pulley 31 and the second pulley 51 is adjustable. By driving the movable positioning mechanism to move through the traction mechanism 7, the first module 3 fixed in the first positioning mechanism 2 is moved away from or closer to the second module 5 fixed in the second positioning mechanism 4, so as to adjust the belt 6 wound on the first pulley 31 and the second pulley 51, so that the belt 6 reaches the preset initial tension. In the process of adjusting the tension of belt 6, the first positioning mechanism 2 and the second positioning mechanism 4 respectively position the first module 3 and the second module 5. On the one hand, the tension of belt 6 can be adjusted simply by operating the traction mechanism 7 to drive the movable positioning mechanism to move, which is simple and convenient and can improve work efficiency. On the other hand, the relative posture of the first module 3 and the second module 5 is uniform, which helps to ensure the consistency of the entire belt drive system while ensuring that the tension of belt 6 can be adjusted to the preset initial tension.

[0043] In this embodiment, the active positioning mechanism is the first positioning mechanism 2. In other embodiments, the active positioning mechanism may also be the second positioning mechanism 4.

[0044] In some embodiments, both the first positioning mechanism 2 and the second positioning mechanism 4 can be movable positioning mechanisms, as long as the first positioning mechanism 2 and the second positioning mechanism 4 can move relative to each other, without any specific restrictions.

[0045] In this embodiment, the belt tension adjustment device further includes a tension detection mechanism, which is used to detect the tension of the belt 6. During actual operation, after the operator adjusts the tension of the belt 6 through the traction mechanism 7, the tension detection mechanism can check the current tension of the belt 6. The tension detection mechanism can display the tension of the belt 6. If the current tension of the belt 6 is less than the preset initial tension, the traction mechanism 7 moves the first positioning mechanism 2 away from the second positioning mechanism 4, increasing the tension of the belt 6. If the current tension of the belt 6 is greater than the preset initial tension, the traction mechanism 7 moves the first positioning mechanism 2 closer to the second positioning mechanism 4, decreasing the tension of the belt 6. This ensures that the tension of the belt 6 is within a suitable range.

[0046] Alternatively, the tension testing mechanism can be an existing, mature component, such as a mechanical tension meter, an electronic tension meter, or a laser belt tension meter, etc., without specific limitations.

[0047] like Figure 1 and Figure 2 As shown, the first positioning mechanism 2 has a first groove 21, which is configured to snap-fit ​​and fix the first module 3. By snapping the first module 3 into the first groove 21, the first module 3 is fixed and its placement and removal are facilitated, thereby improving work efficiency. In this embodiment, the first groove 21 is used to fix the motor 30. The shape and size of the first groove 21 match the outer contour and size of the bottom of the motor housing, so that the motor 30 can be limited and fixed in the first groove 21. The first positioning mechanism 2 includes a first base plate 22 and a first seat 23. The first seat 23 is fixedly connected to the first base plate 22, and the first base plate 22 is movably connected to the base 1. The first groove 21 is formed on the first seat 23.

[0048] like Figure 1 and Figure 2 As shown, the second positioning mechanism 4 has a second groove 41, which is configured to snap-fit ​​and fix the second module 5. By snapping the second module 5 into the second groove 41, the second module 5 is fixed and its placement and removal are facilitated, thereby improving work efficiency. In this embodiment, the second groove 41 is used to fix the housing 50. The shape and size of the second groove 41 match the outer contour and size of the housing 50 so that the housing 50 can be limited and fixed in the second groove 41. The second positioning mechanism 4 includes a second base plate 44 and a second seat 45. The second seat 45 is fixedly connected to the second base plate 44. The second base plate 44 is fixed to the base 1 by fasteners. The second groove 41 is formed on the second seat 45.

[0049] like Figure 2 As shown, a notch 42 is provided on the side wall of the second groove 41 facing the first positioning mechanism 2. The notch 42 is used to avoid the connecting part 52, the first positioning mechanism 2, and the first module 3. In this embodiment, the notch 42 can avoid the connecting part 52, which facilitates the connection between the first module 3 and the second module 5. In addition, it is also used to avoid the first positioning mechanism 2 and the first module 3, so as to avoid interference between the first positioning mechanism 2 and the second positioning mechanism 4 when adjusting the tension of the belt 6, or interference between the first module 3 and the second positioning mechanism 4, which would affect the adjustment of the tension of the belt 6.

[0050] In other embodiments, based on the different specific forms of the first positioning mechanism 2 and the second positioning mechanism 4, and the different specific cooperation relationships of the first module 3 and the second module 5, the second groove 41 may also be used only to avoid the connecting part 52, or only to avoid the first positioning mechanism 2, or only to avoid the first module 3, etc., without specific limitations.

[0051] like Figure 1As shown, the second positioning mechanism 4 is provided with an observation port 43, which communicates with the second groove 41 and is located at the bottom of the side wall of the second groove 41. The observation port 43 is configured to observe whether the second module 5 is placed in place. When the second module 5 is placed into the second groove 41, the operator can observe through the observation port 43 whether the second module 5 abuts against the bottom of the second groove 41, thereby determining whether the second module 5 is placed in place. If it is not placed in place, the position of the second module 5 is adjusted to ensure it is in place, thus avoiding the impact of improper placement of the second module 5 on the adjustment of the tension of the belt 6 and the connection between the first module 3 and the second module 5. In this embodiment, the observation port 43 is located on the second seat 45.

[0052] like Figure 1 As shown, the traction mechanism 7 includes a bracket 71, a lead screw 72, and a nut seat 73. The bracket 71 is fixed to the base 1, the lead screw 72 is rotatably mounted on the bracket 71, the nut seat 73 is threadedly connected to the lead screw 72, and a movable positioning mechanism is connected to the nut seat 73. By driving the lead screw 72 to rotate, the nut seat 73 threadedly connected to the lead screw 72 can drive the first positioning mechanism 2 to move, so that the first positioning mechanism 2 moves along a first direction, thereby adjusting the tension of the belt 6 wound around the first pulley 31 and the second pulley 51. In this embodiment, the first direction is the axial direction of the lead screw 72.

[0053] Optionally, a connector 74 may also be provided, with one end connected to the nut seat 73 and the other end connected to the movable positioning mechanism, i.e., connected to the first positioning mechanism 2. By driving the lead screw 72 to rotate, the nut seat 73 threaded onto the lead screw 72 can drive the connector 74 to move, thereby causing the first positioning mechanism 2 to move along the first direction.

[0054] Optionally, the bracket 71 can be fixed to the base 1 by fasteners such as bolts, and the lead screw 72 can be fixed to the bracket 71 by bearing housing, so that the lead screw 72 can be rotatably mounted on the bracket 71.

[0055] like Figure 1 As shown, the traction mechanism 7 also includes a first guide member 75 and a second guide member 76. The first guide member 75 is arranged parallel to the lead screw 72 and is connected to the bracket 71. The second guide member 76 is connected to the connector 74, and the first guide member 75 and the second guide member 76 are slidably engaged. Through the sliding engagement of the first guide member 75 and the second guide member 76, the movement of the lead screw 72 driving the connector 74 is made more stable, and the directional accuracy of the connector 74 is also guaranteed.

[0056] In this embodiment, the first guide member 75 is a guide post that extends along a first direction and is fixed to the bracket 71. The second guide member 76 is a linear bearing connected to the connecting member 74. Optionally, the traction mechanism 7 has two guide posts symmetrically arranged on both sides of the lead screw 72, each guide post being equipped with a corresponding linear bearing. Therefore, both linear bearings are connected to the connecting member 74, ensuring the smooth movement of the connecting member 74. In other embodiments, the number of guide posts and linear bearings can also be different. In some other embodiments, the first guide member 75 can be a guide rail, and the second guide member 76 can be a slider. These can be selected according to actual needs, and no specific limitations are imposed here.

[0057] In other embodiments, the second guide 76 may be connected to the bracket 71, the first guide 75 may be connected to the connector 74, and the first guide 75 and the second guide 76 may slide together.

[0058] like Figure 1 and Figure 2 As shown, a handwheel 77 is connected to one end of the lead screw 72, and the handwheel 77 is configured to drive the lead screw 72 to rotate. The operator can adjust the tension of the belt 6 by rotating the handwheel 77, making operation more convenient.

[0059] like Figure 1 As shown, the belt tension adjustment device also includes a third guide member 8 and a fourth guide member 9. The third guide member 8 is arranged parallel to the lead screw 72 and is connected to the base 1. The fourth guide member 9 is connected to the first positioning mechanism 2, and the third guide member 8 and the fourth guide member 9 are slidably engaged. Through the sliding engagement of the third guide member 8 and the fourth guide member 9, the first positioning mechanism 2 is slidably connected to the base 1, so that the movement of the first positioning mechanism 2 is more stable and smooth.

[0060] Specifically, the third guide member 8 is a slide rail, extending along the first direction and fixed to the base 1. The fourth guide member 9 is a slider, connected to the bottom of the first base plate 22. Optionally, the belt tension adjustment device is provided with two slide rails, which are spaced apart along the second direction, and each slide rail is equipped with a corresponding slider. Therefore, the two sliders are spaced apart at the bottom of the first base plate 22, thereby stably supporting the first positioning mechanism 2 so that the first positioning mechanism 2 can move smoothly on the slide rail.

[0061] In other embodiments, a fourth guide member 9 (i.e., a slider) may be connected to the base 1, and a third guide member 8 (i.e., a slide rail) may be connected to the second positioning mechanism 4. No specific restrictions are imposed here.

[0062] In this embodiment, the bracket 71 is provided with scale marks (not shown in the figure). The scale marks are used to mark the position of the nut seat 73 and the rotation angle of the lead screw 72. By moving the nut seat 73 to the corresponding scale mark and rotating the lead screw 72 to the corresponding scale mark position, the tension of the belt 6 can be initially adjusted so that the tension of the belt 6 is close to or equal to the preset initial tension. Subsequently, it can be determined whether further adjustment of the tension is needed based on the detection results of the tension detection mechanism. This setting can improve the efficiency of belt 6 tension adjustment.

[0063] In other embodiments, the scale markings may only mark the position of the nut seat 73 or only mark the rotation angle of the lead screw 72, without any specific limitation.

[0064] In other embodiments, scale marks may also be provided on the base 1 to mark the position of the first positioning mechanism 2, without specific limitations.

[0065] In summary, when adjusting the tension of belt 6 using the belt tension adjustment device of this embodiment, the operation steps are roughly as follows:

[0066] First, the first module 3 is placed into the first groove 21 of the first positioning mechanism 2, and the second module 5 is placed into the second groove 41 of the second positioning mechanism 4. The belt 6 is wound around the first pulley 31 and the second pulley 51. Then, the threaded fastener is passed through the oblong hole 521 on the connecting part 52 and threadedly connected to the connecting hole on the first module 3. At this time, the threaded fastener is not fully tightened, and the relative position of the first module 3 and the second module 5 can be adjusted to facilitate the adjustment of the tension of the belt 6. Then, the handwheel 77 is rotated, and the traction mechanism 7 drives the first positioning mechanism 2 to move along the first direction, so that... The first module 3 moves away from the second module 5, thereby continuously tightening the belt 6. When the nut seat 73 and / or the lead screw 72 reach the scale mark on the bracket 71, the tension of the belt 6 is detected by the tension detection mechanism. Based on the detected value, it is determined whether to continue adjusting the tension of the belt 6: If the current belt 6 reaches the preset initial tension, no further adjustment is made, the threaded fasteners are tightened, the first module 3 and the second module 5 are locked, and the tension is detected again by the tension detection mechanism to verify the tension of the belt 6. If the tension is qualified, the tension adjustment of the belt 6 is complete. If the current tension of the belt 6 is different from the preset initial tension, the position of the first positioning mechanism 2 is further adjusted by rotating the handwheel 77 until the detected tension value of the belt 6 is consistent with the preset initial tension. The threaded fasteners are tightened, the first module 3 and the second module 5 are locked, and the tension is detected again by the tension detection mechanism to verify the tension of the belt 6. If the tension is qualified, the tension adjustment of the belt 6 is complete.

[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A belt tension adjusting device for adjusting the tension of a belt (6) in a belt drive system, the belt drive system comprising a first module (3) and a second module (5) detachably connected, the first module (3) comprising a first pulley (31), the second module (5) comprising a second pulley (51), the belt (6) being wound around the first pulley (31) and the second pulley (51), characterized in that, The belt tension adjustment device includes: Base (1); The first positioning mechanism (2) is used to position the first module (3); The second positioning mechanism (4) is used to position the second module (5), and at least one of the first positioning mechanism (2) and the second positioning mechanism (4) is an active positioning mechanism that can move relative to the base (1). A traction mechanism (7) is installed on the base (1), and the output end of the traction mechanism (7) is connected to the movable positioning mechanism so that the distance between the first pulley (31) and the second pulley (51) is adjustable.

2. The belt tension adjusting device according to claim 1, characterized in that, The second positioning mechanism (4) has a second groove (41), which is configured to snap and fix the second module (5).

3. The belt tension adjusting device according to claim 2, characterized in that, The second module (5) includes a connecting part (52) that extends to the first module (3) and is used for detachable connection with the first module (3); The second groove (41) has a notch (42) on the side wall facing the first positioning mechanism (2), and the notch (42) is used to avoid the connecting part (52) and / or the first positioning mechanism (2) and / or the first module (3).

4. The belt tension adjusting device according to claim 2, characterized in that, The second positioning mechanism (4) is provided with an observation port (43), which is connected to the second groove (41) and located at the bottom of the side wall of the second groove (41). The observation port (43) is configured to observe whether the second module (5) is installed in place.

5. The belt tension adjusting device according to claim 1, characterized in that, The first positioning mechanism (2) has a first groove (21), which is configured to snap and fix the first module (3).

6. The belt tension adjusting device according to any one of claims 1-5, characterized in that, The traction mechanism (7) includes a bracket (71), a lead screw (72) and a nut seat (73). The bracket (71) is fixed on the base (1). The lead screw (72) is rotatably mounted on the bracket (71). The nut seat (73) is threadedly connected to the lead screw (72), and the movable positioning mechanism is connected to the nut seat (73).

7. The belt tension adjusting device according to claim 6, characterized in that, The traction mechanism (7) further includes a first guide (75) and a second guide (76). The first guide (75) is arranged parallel to the lead screw (72). Of the first guide (75) and the second guide (76), one is connected to the bracket (71), and the other is connected to the movable positioning mechanism. The first guide (75) and the second guide (76) are in sliding engagement; and / or One end of the lead screw (72) is connected to a handwheel (77), which is configured to drive the lead screw (72) to rotate.

8. The belt tension adjusting device according to claim 6, characterized in that, The belt tension adjustment device further includes a third guide (8) and a fourth guide (9). The third guide (8) is arranged parallel to the lead screw (72). Of the third guide (8) and the fourth guide (9), one is connected to the base (1) and the other is connected to the first positioning mechanism (2). The third guide (8) and the fourth guide (9) are in sliding cooperation.

9. The belt tension adjusting device according to claim 6, characterized in that, The bracket (71) is provided with scale markings, which are used to mark the position of the nut seat (73) and / or the rotation angle of the lead screw (72).

10. The belt tension adjusting device according to any one of claims 1-5, characterized in that, The belt tension adjustment device further includes a tension detection mechanism, which is used to detect the tension of the belt (6).

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