Triangular belt tensioning device and vertical shaft impact crusher

Abstract

The utility model discloses a V-belt tensioning device and a vertical shaft impact crusher. The V-belt tensioning device comprises a mounting seat mounted on a rack, a motor base, an adjusting mechanism used for adjusting the relative position between the motor base and the mounting base, a rolling mechanism used for being connected with the motor base in a rolling mode and a jacking mechanism used for driving the rolling mechanism to ascend and descend are arranged on the mounting base, a main shaft is arranged on the machine frame, a motor is arranged on the motor base, and the jacking mechanism is arranged on the machine frame. A belt wheel is arranged on an output shaft of the motor, the main shaft is connected with the belt wheel through a triangular belt, and the relative position between the motor seat and the mounting seat is adjusted through the adjusting mechanism so as to tension the triangular belt; a pure mechanical structure is adopted, no complex part is contained, the structure is simple, the triangular belt does not need to be replaced frequently, the use cost is reduced, the efficiency of triangular belt tensioning adjustment can be improved, the time for shutdown maintenance is shortened, the working intensity of maintenance personnel is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crushers, in particular to a V-belt tensioning device. In addition, the utility model also relates to a vertical shaft impact crusher comprising the V-belt tensioning device. Background Art

[0002] In the field of crusher equipment, vertical shaft impact crusher is also called sand making machine. In the existing sand making machine, the lower end of the motor is provided with a pulley and fixed to the motor seat, the motor seat is fixed to the mounting seat, the mounting seat is connected to the crusher base, one end of the V-belt is connected to the pulley under the motor, and the other end is connected to the crusher mainframe. During the working process, due to the large vibration and load impact of the equipment, normal wear of the V-belt and long-term pulling transmission, the V-belt between the motor and the crusher becomes loose, and then the tension of the V-belt and the driving force of the motor transmission drop sharply, and the energy consumption of the crusher increases. Therefore, the relative position of the motor and the crusher base needs to be adjusted according to the working conditions of the crusher to achieve the purpose of tensioning the V-belt.

[0003] At present, the motor of the vertical shaft impact crusher equipped with a V-belt tensioning device is fixed on the motor seat, which is located on the mounting seat, and the motor seat and the mounting seat are slidably connected. Adjustment screws are set on the left and right sides of the mounting seat, and the left and right adjustment screws on the mounting seat are rotated to drive the motor seat to slide on the mounting seat, so as to achieve the purpose of adjusting the relative position of the motor seat and the mounting seat by the adjustment screws and tensioning the V-belt. When adjusting the relative position of the motor seat and the mounting seat, the motor seat is easily stuck and unable to slide due to the excessive friction between the motor seat and the mounting seat; and because the adjustment screw is a long-distance, single-point power supply source, the left and right adjustment screws are prone to different forces, resulting in bending of the adjustment screw, which in turn causes the motor seat to tilt; its adjustment efficiency is low, and downtime for maintenance requires time and effort, which will greatly reduce production efficiency. Utility Model Content

[0004] The utility model provides a V-belt tensioning device and a vertical shaft impact crusher to solve the technical problems of the prior art V-belt tensioning device, that the friction between the motor seat and the mounting seat is too large, the motor seat is easy to get stuck and tilted, the adjustment efficiency is low, and shutdown maintenance requires time and effort, which will greatly reduce the production efficiency.

[0005] According to one aspect of the utility model, a V-belt tensioning device is provided, comprising a mounting seat installed on a frame, the mounting seat is provided with a motor seat, an adjusting mechanism for adjusting the relative position between the motor seat and the mounting seat, a rolling mechanism for rollingly connecting the motor seat and a lifting mechanism for driving the rolling mechanism to rise and fall, the frame is provided with a main shaft, the motor seat is provided with a motor, a pulley is provided on the output shaft of the motor, the main shaft and the pulley are connected by a V-belt, and the relative position between the motor seat and the mounting seat is adjusted by the adjusting mechanism to tension the V-belt.

[0006] Furthermore, the mounting base includes a front side plate for connecting to the frame, a rear side plate arranged parallel to the front side plate, a first side plate for connecting the front side plate and the rear side plate, and a second side plate arranged parallel to the first side plate for connecting the front side plate and the rear side plate, the first side plate and the second side plate are arranged in parallel, and slide rails are respectively arranged on the first side plate and the second side plate, and lifting grooves corresponding to the lifting mechanisms are opened on the slide rails, so that the rolling mechanism can pass through the lifting grooves to lift the motor seat or retract from the lifting grooves to disengage from the motor seat.

[0007] Furthermore, the slide rail is provided with a slide groove for limiting the adjustment stroke of the motor seat and the mounting seat, the motor seat is provided with a sliding member adapted to the slide groove, and the sliding member is provided with a locking member for locking the relative position between the motor seat and the mounting seat.

[0008] Furthermore, reinforcing ribs are arranged between the front side plate and the slide rail, between the first side plate and the slide rail, between the second side plate and the slide rail, between the front side plate and the first side plate, and between the front side plate and the second side plate.

[0009] Furthermore, a baffle is arranged on the front side plate, two sides of the baffle are respectively connected to the first side plate and the second side plate, and reinforcing ribs are arranged between the baffle and the front side plate.

[0010] Furthermore, the motor seat includes a mounting plate for installing the motor, a supporting transverse plate arranged parallel to the slide rail, and a supporting vertical plate arranged parallel to the first side plate, the supporting vertical plate is provided with a limiting groove for connecting the adjusting mechanism, and the rolling mechanism can pass through the lifting groove and be rollingly connected to the supporting transverse plate.

[0011] Furthermore, the adjustment mechanism includes a seat bearing, an adjustment screw and an adjustment column. One end of the adjustment screw is threadedly connected to the adjustment column, and the other end is rotatably connected to the rear side plate through the seat bearing. The adjustment column is arranged in the limit groove. By rotating the adjustment screw, the adjustment column drives the motor seat to move forward and backward along the axial direction of the adjustment screw.

[0012] Furthermore, the adjusting column is a cylinder or a block.

[0013] Furthermore, the lifting mechanism includes a lifting seat arranged below the lifting groove, a slider slidably embedded in the lifting seat, and an adjusting bolt threadedly connected to the lifting seat. The rolling mechanism is arranged on the slider, and the slider drives the rolling mechanism to rise and fall by rotating the adjusting bolt.

[0014] According to another aspect of the utility model, a vertical shaft impact crusher is also provided, which includes the above-mentioned V-belt tensioning device.

[0015] The utility model has the following beneficial effects:

[0016] The V-belt tensioning device of the utility model releases the lock of the motor seat and the mounting seat when the V-belt is loose, drives the rolling mechanism to rise through the jacking mechanism, makes the rolling mechanism contact with the motor seat and lifts the motor seat, and rotates the adjusting mechanism to adjust the relative position between the motor seat and the mounting seat, and can convert the sliding friction between the mounting seat and the motor seat into rolling friction, thereby reducing the friction between the mounting seat and the motor seat, avoiding the jamming of the motor seat, and ensuring that the motor seat can smoothly adjust the position, thereby improving the efficiency of the motor seat position adjustment; after the motor seat moves to a suitable position, drives the rolling mechanism to descend through the jacking mechanism, so that the rolling mechanism is out of contact with the motor seat, and the motor seat is seated on the mounting seat, and the position of the motor seat and the mounting seat is locked to complete the adjustment; it adopts a purely mechanical structure, does not contain complex components, has a simple structure, does not need to frequently replace the V-belt, can reduce the cost of use, can improve the efficiency of the V-belt tensioning adjustment, reduce the time of downtime for maintenance, reduce the work intensity of maintenance personnel, and improve production efficiency.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1It is a structural schematic diagram of a V-belt tensioning device of a preferred embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of a mounting base of a preferred embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the motor base of the preferred embodiment of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the adjustment mechanism of the preferred embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the jacking mechanism of the preferred embodiment of the utility model.

[0024] Legend:

[0025] 1. Mounting seat; 11. Front side plate; 12. Rear side plate; 13. First side plate; 14. Second side plate; 15. Slide rail; 151. Lifting slot; 152. Slide slot; 16. Reinforcement rib; 17. Baffle; 2. Motor seat; 21. Mounting plate; 22. Supporting horizontal plate; 23. Supporting vertical plate; 231. Limiting slot; 24. Sliding part; 3. Motor; 4. Adjusting mechanism; 41. Seat bearing; 42. Adjusting screw; 43. Adjusting column; 5. Rolling mechanism; 51. Rotating shaft; 6. V-belt; 7. Lifting mechanism; 71. Lifting seat; 72. Sliding block; 73. Adjusting bolt. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0027] Please also read Figures 1 to 5 The V-belt tensioning device of this embodiment includes a mounting base 1 installed on a frame, a motor base 2, an adjusting mechanism 4 for adjusting the relative position between the motor base 2 and the mounting base 1, a rolling mechanism 5 for rollingly connecting the motor base 2, and a lifting mechanism 7 for driving the rolling mechanism 5 to rise and fall, a main shaft is arranged on the frame, a motor 3 is arranged on the motor base 2, a pulley is arranged on the output shaft of the motor 3, the main shaft and the pulley are connected by a V-belt 6, and the relative position between the motor base 2 and the mounting base 1 is adjusted by the adjusting mechanism 4 to tension the V-belt 6.

[0028] The V-belt tensioning device of the present embodiment, when the V-belt 6 is loose, first releases the lock between the motor seat 2 and the mounting seat 1, and drives the rolling mechanism 5 to rise through the lifting mechanism 7, so that the rolling mechanism 5 contacts the motor seat 2 and lifts the motor seat 2, and the relative position between the motor seat 2 and the mounting seat 1 can be adjusted by rotating the adjusting mechanism 4, which can convert the sliding friction between the mounting seat 1 and the motor seat 2 into rolling friction, thereby reducing the friction between the mounting seat 1 and the motor seat 2, avoiding the motor seat 2 from getting stuck, and ensuring that the motor seat 2 can smoothly adjust the position, thereby improving the efficiency of the position adjustment of the motor seat 2; after the motor seat 2 moves to a suitable position, the rolling mechanism 5 is driven down by the lifting mechanism 7, so that the rolling mechanism 5 is out of contact with the motor seat 2, and the motor seat 2 is seated on the mounting seat 1, and the position of the motor seat 2 and the mounting seat 1 is locked to complete the adjustment; the V-belt tensioning device of the present embodiment adopts a purely mechanical structure, does not contain complex components, has a simple structure, does not need to frequently replace the V-belt 6, can reduce the cost of use, can improve the efficiency of the V-belt tensioning adjustment, reduce the time of downtime for maintenance, and reduce the work intensity of maintenance personnel.

[0029] like Figure 2 As shown, in this embodiment, the mounting base 1 includes a front side plate 11 for connecting the frame, a rear side plate 12 arranged in parallel with the front side plate 11, a first side plate 13 for connecting the front side plate 11 and the rear side plate 12, and a second side plate 14 arranged in parallel with the first side plate 13 for connecting the front side plate 11 and the rear side plate 12. The first side plate 13 and the second side plate 14 are arranged in parallel, and slide rails 15 are arranged on the first side plate 13 and the second side plate 14, respectively. The slide rails 15 are provided with jacking grooves 151 corresponding to the jacking mechanisms 7 one by one, so that the rolling mechanism 5 can pass through the jacking grooves 151. The motor base 2 is lifted up or retracted from the lifting groove 151 to disengage from the motor base 2. The front side plate 11, the first side plate 13, the rear side plate 12 and the second side plate 14 form a frame structure. The slide rail 15 on the first side plate 13 is arranged in parallel with the slide rail 15 on the second side plate 14 to support the motor base 2. At least two lifting grooves 151 are provided on each slide rail 15 to ensure that when the rolling mechanism 5 lifts up the motor base 2, the motor base 2 is completely disengaged from the slide rail 15, thereby converting the sliding friction between the motor base 2 and the slide rail 15 into rolling friction, which can reduce friction and avoid jamming.

[0030] like Figure 2 and Figure 4As shown, in this embodiment, a slide groove 152 is provided on the slide rail 15 for limiting the adjustment stroke of the motor seat 2 and the mounting seat 1, a sliding member 24 adapted to the slide groove 152 is arranged on the motor seat 2, and a locking member for locking the relative position between the motor seat 2 and the mounting seat 1 is arranged on the sliding member 24; the distance between the two end points of the slide groove 152 is the adjustment stroke of the motor seat 2, the sliding member 24 is a screw, and the locking member is a nut adapted to the screw, and loosening the nut can make the motor seat 2 slide along the slide groove 152, thereby realizing the relative position adjustment between the motor seat 2 and the mounting seat 1; after the motor seat 2 moves to a suitable position, the motor seat 2 and the mounting seat 1 can be fixed by tightening the nut, which has a simple structure and low manufacturing cost. Optionally, two slide grooves 152 are provided on each slide rail 15, and the four sliding members 24 corresponding to the four slide grooves 152 can prevent the motor seat 2 from deflecting.

[0031] like Figure 2 As shown, in this embodiment, reinforcing ribs 16 are arranged between the front side plate 11 and the slide rail 15, between the first side plate 13 and the slide rail 15, between the second side plate 14 and the slide rail 15, between the front side plate 11 and the first side plate 13, and between the front side plate 11 and the second side plate 14, respectively, to increase the strength of the mounting base 1 and prevent the mounting base 1 from deforming.

[0032] like Figure 2 As shown, in this embodiment, a baffle 17 is arranged on the front side plate 11, and the two sides of the baffle 17 are respectively connected to the first side plate 13 and the second side plate 14; the baffle 17 can block the gap above the mounting seat 1 to prevent dust from adhering to the V-belt 6 and causing the V-belt 6 to wear too quickly, thereby extending the service life of the V-belt 6; reinforcing ribs 16 are arranged between the baffle 17 and the front side plate 11 to increase the connection strength between the baffle 17 and the front side plate 11 and prevent the baffle 17 from deforming.

[0033] like Figure 3 As shown, in this embodiment, the motor seat 2 includes a mounting plate 21 for mounting the motor 3, a supporting transverse plate 22 arranged parallel to the slide rail 15, and a supporting vertical plate 23 arranged parallel to the first side plate 13, and a limiting groove 231 for connecting the adjustment mechanism 4 is arranged on the supporting vertical plate 23, and two limiting plates arranged at intervals form the limiting groove 231, and the rolling mechanism 5 can pass through the lifting groove 151 and roll with the supporting transverse plate 22. The two supporting vertical plates 23 are symmetrically arranged on both sides of the mounting plate 21. When the rolling mechanism 5 descends and disengages from the supporting transverse plate 22, the supporting transverse plate 22 is seated on the slide rail 15; when the rolling mechanism 5 rises and lifts the supporting transverse plate 22, the adjustment mechanism 4 can drive the supporting vertical plate 23 to move through the limiting groove 231, thereby adjusting the relative position between the motor seat 2 and the mounting seat 1, and the structure is simple and the manufacturing cost is low. Optionally, a plurality of mounting holes are arranged on the mounting plate 21 to install motors 3 of different specifications of the base.

[0034] like Figure 3 and Figure 4 As shown, in this embodiment, the adjusting mechanism 4 includes a seat bearing 41, an adjusting screw 42 and an adjusting column 43. One end of the adjusting screw 42 is threadedly connected to the adjusting column 43, and the other end is rotatably connected to the rear side plate 12 through the seat bearing 41. The adjusting column 43 is arranged in the limiting groove 231. By rotating the adjusting screw 42, the adjusting column 43 drives the motor seat 2 to move forward and backward along the axial direction of the adjusting screw 42; the axis of the adjusting screw 42 is arranged parallel to the length direction of the slide groove 152, and the limiting groove 231 can prevent the adjusting column 43 from rotating with the adjusting screw 42. When the adjusting screw 42 is rotated, the adjusting column 43 can move forward and backward along the axial direction of the adjusting screw 42. The adjusting column 43 drives the motor seat 2 to slide forward and backward through the supporting vertical plate 23, which can be based on According to the actual use requirements, the position of the adjusting column 43 on the adjusting screw 42 is adjusted to ensure that the tension on the V-belt 6 is within the required range, thereby avoiding the problem of the V-belt 6 being too tight or too loose; the adjusting column 43 is a cylinder with a threaded hole, and is clamped in the limit groove 231. The limit plate is provided with a through hole for passing the adjusting screw 42. The limit groove 231 is arranged at one end close to the rear side plate 12. The threaded hole on the adjusting column 43, the through hole on the limit plate and the seat bearing 41 are coaxially arranged, which can effectively reduce the overhang length of the adjusting screw 42 between the seat bearing 41 and the adjusting column 43, thereby avoiding the bending of the adjusting screw 42 due to the overhang and single-point force, causing the motor seat 2 to be skewed and the motor seat 2 to be unable to be pushed. Optionally, the adjusting mechanism 4 and the slide rail 15 are arranged one by one, which can avoid the motor seat 2 from being skewed and improve the stability of the movement of the motor seat 2. Optionally, the adjusting screws 42 of the two adjusting mechanisms 4 are synchronously driven by a motor through gears, which has a compact structure and can automatically adjust the relative position between the motor base 2 and the mounting base 1, thereby reducing manual labor intensity.

[0035] In this embodiment, the adjusting column 43 is a block with a threaded hole, which can increase the contact area between the adjusting column 43 and the limiting plate and prevent the limiting plate from deforming.

[0036] like Figure 5As shown, in the present embodiment, the lifting mechanism 7 includes a lifting seat 71 arranged below the lifting groove 151, a slider 72 slidably embedded in the lifting seat 71 and an adjusting bolt 73 screwed to the lifting seat 71, and the rolling mechanism 5 is arranged on the slider 72, and the adjusting bolt 73 is rotated to make the slider 72 drive the rolling mechanism 5 to rise and fall; when the adjusting bolt 73 is rotated to make the slider 72 drive the rolling mechanism 5 to rise, the rolling mechanism 5 can contact with the supporting cross plate 22 and lift the motor seat 2, thereby converting the sliding friction between the supporting cross plate 22 and the slide rail 15 into rolling friction, which can reduce friction and avoid jamming; when the adjusting bolt 73 is rotated to make the slider 72 drive the rolling mechanism 5 to descend, the rolling mechanism 5 is out of contact with the supporting cross plate 22, and the supporting cross plate 22 is seated on the slide rail 15, and the motor seat 2 and the mounting seat 1 are fixed by the locking slider 24. The structure is simple and the tensioning of the V-belt 6 can be completed quickly and effectively. Optionally, the lifting seat 71 is installed on the slide rail 15, so that the position of the lifting seat 71 and the corresponding lifting groove 151 is fixed, the structure is simple, and the assembly difficulty is low. Optionally, the lifting seat 71 is installed on the first side plate 13 or the second side plate 14, and the lifting seat 71 has a strong bearing capacity, but the position of the lifting seat 71 and the corresponding lifting groove 151 needs to be aligned during assembly.

[0037] like Figure 5 As shown, in this embodiment, the rolling mechanism 5 is a roller, and the roller is rotatably connected to the slider 72 through the rotating shaft 51. Optionally, the rolling mechanism 5 is a rolling bearing, and the rolling bearing is rotatably connected to the slider 72 through the rotating shaft 51. Optionally, the rolling mechanism 5 is a ball, and the lower part of the ball is embedded in the slider 72, and the top of the ball leaks out of the slider 72 and can rotate in the slider 72.

[0038] A vertical shaft impact crusher, comprising the above-mentioned V-belt tensioning device; the main shaft arranged on the frame provides a power source for the vertical shaft impact crusher. When the V-belt 6 becomes loose, there is no need to replace a new V-belt 6. It is only necessary to loosen the locking piece on the motor seat 2 and the sliding piece 24 in the slide groove 152; then rotate the adjusting bolt 73 of the lifting mechanism 7 to make the rolling mechanism 5 contact with the supporting cross plate 22 and lift the supporting cross plate 22; then rotate the adjusting screw 42 of the adjusting mechanism 4 to make the adjusting column 43 move backward, thereby driving the motor seat 2 to move backward, and then changing the relative position of the motor seat 2 and the main shaft to tighten the V-belt 6, thereby maximizing the V-belt efficiency. The utility model adopts a purely mechanical structure, which is simple and reliable, has high connection strength and low manufacturing cost. During the adjustment process, different strokes can be adjusted according to the tightness of the V-belt 6. The sliding friction between the mounting base 1 and the motor base 2 can also be effectively converted into rolling friction, which can improve the adjustment efficiency and reduce the work intensity of maintenance personnel. The adjustment column 43 arranged at the end of the adjusting screw 42 is clamped in the limit groove 231, which can effectively reduce the overhang length of the adjusting screw 42 and increase and balance the contact force surface, thereby avoiding the bending of the adjusting screw 42 due to excessive overhang and single-point force, the tilting of the motor base 2 and the inability to push the motor base 2.

[0039] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A V-belt tensioning device, characterized in that: The invention comprises a mounting seat (1) mounted on a frame, wherein the mounting seat (1) is provided with a motor seat (2), an adjusting mechanism (4) for adjusting the relative position between the motor seat (2) and the mounting seat (1), a rolling mechanism (5) for rolling connection with the motor seat (2), and a lifting mechanism (7) for driving the rolling mechanism (5) to rise and fall. A main shaft is arranged on the frame, a motor (3) is arranged on the motor seat (2), a pulley is arranged on the output shaft of the motor (3), the main shaft and the pulley are connected via a V-belt (6), and the relative position between the motor seat (2) and the mounting seat (1) is adjusted via the adjustment mechanism (4) to tighten the V-belt (6).

2. The V-belt tensioning device according to claim 1, characterized in that: The mounting seat (1) comprises a front side plate (11) for connecting to a frame, a rear side plate (12) arranged in parallel with the front side plate (11), a first side plate (13) for connecting the front side plate (11) and the rear side plate (12), and a second side plate (14) arranged in parallel with the first side plate (13) for connecting the front side plate (11) and the rear side plate (12), wherein the first side plate (13) and the second side plate (14) are arranged in parallel. The first side plate (13) and the second side plate (14) are respectively provided with slide rails (15), and the slide rails (15) are provided with lifting grooves (151) corresponding to the lifting mechanisms (7) one by one, so that the rolling mechanism (5) can pass through the lifting grooves (151) to lift the motor seat (2) or retract from the lifting grooves (151) to break contact with the motor seat (2).

3. The V-belt tensioning device according to claim 2, characterized in that: The slide rail (15) is provided with a slide groove (152) for limiting the adjustment stroke of the motor seat (2) and the mounting seat (1); the motor seat (2) is provided with a sliding member (24) adapted to the slide groove (152); the sliding member (24) is provided with a locking member for locking the relative position between the motor seat (2) and the mounting seat (1).

4. The V-belt tensioning device according to claim 2 or 3, characterized in that: Reinforcing ribs (16) are arranged respectively between the front side plate (11) and the slide rail (15), between the first side plate (13) and the slide rail (15), between the second side plate (14) and the slide rail (15), between the front side plate (11) and the first side plate (13), and between the front side plate (11) and the second side plate (14).

5. The V-belt tensioning device according to claim 4, characterized in that: A baffle (17) is arranged on the front side plate (11), two sides of the baffle (17) are respectively connected to the first side plate (13) and the second side plate (14), and a reinforcing rib (16) is arranged between the baffle (17) and the front side plate (11).

6. The V-belt tensioning device according to claim 4, characterized in that: The motor seat (2) comprises a mounting plate (21) for mounting the motor (3), a supporting transverse plate (22) arranged parallel to the slide rail (15), and a supporting vertical plate (23) arranged parallel to the first side plate (13). The supporting vertical plate (23) is provided with a limiting groove (231) for connecting the adjusting mechanism (4), and the rolling mechanism (5) can pass through the lifting groove (151) and be rollingly connected with the supporting horizontal plate (22).

7. The V-belt tensioning device according to claim 6, characterized in that: The adjusting mechanism (4) comprises a seat bearing (41), an adjusting screw (42) and an adjusting column (43); one end of the adjusting screw (42) is threadedly connected to the adjusting column (43), and the other end is rotatably connected to the rear side plate (12) through the seat bearing (41); the adjusting column (43) is arranged in the limiting groove (231); by rotating the adjusting screw (42), the adjusting column (43) drives the motor seat (2) to move forward and backward along the axial direction of the adjusting screw (42).

8. The V-belt tensioning device according to claim 7, characterized in that: The adjusting column (43) is a cylinder or a block.

9. The V-belt tensioning device according to claim 6, characterized in that: The lifting mechanism (7) comprises a lifting seat (71) arranged below the lifting groove (151), a slider (72) slidably embedded in the lifting seat (71), and an adjusting bolt (73) threadedly connected to the lifting seat (71); the rolling mechanism (5) is arranged on the slider (72); by rotating the adjusting bolt (73), the slider (72) drives the rolling mechanism (5) to move up and down.

10. A vertical shaft impact crusher, characterized in that: A V-belt tensioning device comprising the V-belt tensioning device according to any one of claims 1 to 9.

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