Conveyor belt tensioning device capable of conveniently adjusting tensioning force

Abstract

The utility model discloses a conveying belt tensioning device capable of conveniently adjusting tensioning force, relates to the related field of conveying belt tensioning, and aims to solve the problems that in the prior art, tension adjustment depends on vertical driving, the tensioning adjustment range is limited by the vertical height of a tensioning structure, the vertical driving height needs to be increased in order to expand the tensioning adjustment range, and the tensioning force is not adjustable. And more operation space is occupied. A first driving motor is mounted on the outer side of the first mounting bracket, a first connecting gear is mounted on the inner side of the first mounting bracket along the output shaft end of the first driving motor, and a second connecting gear is mounted on the inner side of the first mounting bracket along the lower end of the first connecting gear; a first rotating side plate is coaxially fixed to the inner side of the second connecting gear. A second rotating side plate is connected to the inner side of the second mounting support, the first rotating side plate and the second rotating side plate are the same in external shape, and a first rotating roller is mounted at the upper end between the first rotating side plate and the second rotating side plate.

Description

Technical Field

[0001] The utility model relates to the field related to conveyor belt tensioning, in particular to a conveyor belt tensioning device convenient for adjusting the tension force. Background Technique

[0002] In modern industrial production, belt conveyors, as important equipment for material transportation, are widely used in many fields such as coal, ore, building materials, and chemical industry. Belt conveyors continuously and smoothly transport materials through conveyor belts, and their operating efficiency and stability directly affect the efficiency and safety of the entire production line. However, during the operation of the conveyor belt, it will be affected by various factors, such as load changes, start and stop operations, temperature changes, and creep of the conveyor belt itself. These factors will cause changes in the conveyor belt tension. When the tension is insufficient, the conveyor belt is prone to slipping, affecting the material transportation efficiency; while when the tension is too large, it may exacerbate the wear of the conveyor belt and the rollers, shortening the service life of the equipment. Tension changes may cause problems such as slipping, deviation, and increased wear, and in severe cases, it may even lead to equipment failures and shutdowns.

[0003] In order to avoid the influence of tension changes during the operation of the conveyor belt, a conveyor belt tensioning device is provided for tension adjustment to ensure the normal use of the equipment.

[0004] For example, the Chinese authorized patent with the publication number CN 221025817 U (a conveyor belt tensioning device) includes two brackets, a tensioning large roller, and two tensioning small rollers. The brackets are fixedly connected to the intermediate frame. The two tensioning small rollers are located on the left and right sides of the brackets and are rotatably connected to the intermediate frame. A vertical fixing screw is provided on each bracket. A sliding slider and a threaded nut are sleeved on the screw. The slider is located below the nut. A spring is fixed between the bottom of the two sliders and the bottom of the bracket. Connecting blocks are slidably arranged on the sliders. Rotation holes are provided on the two connecting blocks. The two ends of the roller shaft of the tensioning large roller are rotatably clamped in the two rotation holes. By fixing the screw on the bracket, sleeving the slider on the screw, and providing a spring at the bottom of the slider, when the conveyor belt elongates, the reset action of the spring drives the slider and the tensioning large roller to move downward to complete automatic tensioning.

[0005] Although the above-mentioned prior art has the function of automatic tensioning, the tension adjustment relies on vertical driving, and the vertical height of the tensioning structure limits the tension adjustment range. In order to expand the tension adjustment range, it is necessary to increase the vertical driving height, occupying more operating space. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a conveyor belt tensioning device that is convenient for adjusting the tension, so as to solve the problem proposed in the above background technology that the tension adjustment relies on vertical driving, and the vertical height of the tensioning structure limits the tension adjustment range. In order to expand the tension adjustment range, it is necessary to increase the vertical driving height, which occupies a relatively large operating space.

[0007] To achieve the above purpose, the present utility model provides the following technical solution: A conveyor belt tensioning device that is convenient for adjusting the tension, including a conveyor belt body, a first mounting bracket, and a second mounting bracket. The first mounting bracket and the second mounting bracket have the same structure. A first driving motor is installed on the outer side of the first mounting bracket. A first connecting gear is installed along the output shaft end of the first driving motor on the inner side of the first mounting bracket. A second connecting gear is installed along the lower end of the first connecting gear on the inner side of the first mounting bracket. A first rotating side plate is coaxially fixed inside the second connecting gear. The inner side of the second mounting bracket is connected with a second rotating side plate. The outer shapes of the first rotating side plate and the second rotating side plate are the same. A first roller is installed between the upper ends of the first rotating side plate and the second rotating side plate. A second roller is installed between the lower ends of the first rotating side plate and the second rotating side plate. The first roller and the second roller are symmetrically arranged. The conveyor belt body enters from the lower end of the second roller, passes through the space between the first roller and the second roller in an "S" shape, and exits from the upper end of the first roller.

[0008] Preferably, first inner driving cavities and second inner driving cavities are respectively formed inside the first rotating side plate and the second rotating side plate. Rectangular grooves are respectively opened at the upper and lower ends of the inner side surfaces of the first rotating side plate and the second rotating side plate. The two groups of rectangular grooves are respectively communicated with the interiors of the first inner driving cavity and the second inner driving cavity.

[0009] Preferably, first sliding blocks are symmetrically arranged at the upper and lower ends inside the first inner driving cavity. The sides of the first sliding blocks pass through the rectangular grooves. Second sliding blocks are symmetrically arranged at the upper and lower ends inside the second inner driving cavity. The sides of the second sliding blocks pass through the rectangular grooves. The first roller is rotatably connected between the upper first sliding block and the upper second sliding block. The second roller is rotatably connected between the lower first sliding block and the lower second sliding block.

[0010] Preferably, a rotating sleeve is fixed on the outer side of the second rotating side plate. The other end of the rotating sleeve is rotatably connected with the second mounting bracket through a bearing. A second driving motor is installed at the outer end of the second mounting bracket. A rotating intermediate shaft is installed at the output shaft end of the second driving motor.

[0011] Preferably, the rotating intermediate shaft passes through the rotating sleeve and extends into the second inner driving cavity and is connected with a first rotating bevel gear. A second rotating bevel gear is arranged along the lower end of the first rotating bevel gear inside the second inner driving cavity. The second rotating bevel gear meshes with the first rotating bevel gear.

[0012] Preferably, a central rotating shaft passes through the second rotating bevel gear. The upper and lower ends of the central rotating shaft are connected to the inner end faces of the second rotating side plates through bearings. Symmetrically arranged at the upper and lower ends of the outer part of the central rotating shaft are external driving threads, and the external driving threads are threadedly connected to the second sliding blocks.

[0013] Preferably, first vertical limiting rods are fixed at the front and rear ends inside the first rotating side plate, and the first sliding block slides along the first vertical limiting rods. Second vertical limiting rods are fixed at the front and rear ends inside the second rotating side plate, and the second sliding block slides along the second vertical limiting rods.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: Tension adjustment relies on vertical driving. The vertical height of the tensioning structure limits the tensioning adjustment range. In order to expand the tensioning adjustment range, it is necessary to increase the vertical driving height, which occupies a relatively large operating space.

[0015] 1. In this utility model, the conveyor belt body enters from the lower end of the second roller, passes through the space between the first roller and the second roller in an "S" shape, and exits from the upper end of the first roller. The first driving motor drives the first connecting gear to rotate. Through the meshing connection relationship between the first connecting gear and the second connecting gear, the first rotating side plate is driven to rotate. The first rotating side plate drives the rotating sleeve of the second rotating side plate through the connection of the first roller and the second roller. When the first roller and the second roller rotate clockwise, the winding surface of the conveyor belt body decreases, and the tension of the conveyor belt body becomes smaller. When the first roller and the second roller rotate counterclockwise, the contact surface between the first roller and the second roller and the conveyor belt body increases, and the tension of the conveyor belt body increases. Since the tensioning process is achieved by adjusting the positions of the first roller and the second roller relative to the conveyor belt body, when the first roller and the second roller rotate counterclockwise, the conveyor belt body will form a three-layer-like folding structure, thereby adjusting the tension. Compared with vertical driving adjustment, it occupies less space and has a larger adjustment range.

[0016] 2. In this utility model, the combination of a dual tensioning mechanism (i.e., roller rotation adjustment and slider outward movement adjustment) enables the tension of the conveyor belt body to be precisely controlled according to actual needs. When the first roller and the second roller rotate to the extreme state (the conveyor belt body cannot move and make contact), the tension can still be adjusted by moving the first roller and the second roller outward. Without increasing the occupied space of the entire device too much, a secondary tensioning process can be carried out. The cooperation of the two further expands the tensioning adjustment range of the entire device, ensuring the stable operation of the conveying system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a conveyor belt tensioning device for conveniently adjusting the tension force from the main perspective of the present utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of another perspective of a conveyor belt tensioning device for conveniently adjusting the tension force of the present utility model;

[0019] Figure 3 It is a front view of a conveyor belt tensioning device for conveniently adjusting the tension force of the present utility model;

[0020] Figure 4 It is a sectional view taken along line A - A of a conveyor belt tensioning device for conveniently adjusting the tension force of the present utility model;

[0021] Figure 5 It is a sectional view taken along line B - B of a conveyor belt tensioning device for conveniently adjusting the tension force of the present utility model;

[0022] Figure 6 It is a top view of a conveyor belt tensioning device for conveniently adjusting the tension force of the present utility model;

[0023] Figure 7 It is a sectional view taken along line C - C of a conveyor belt tensioning device for conveniently adjusting the tension force of the present utility model;

[0024] Figure 8 It is a schematic diagram of the connection relationship between the rotating sleeve and the rotating intermediate shaft of a conveyor belt tensioning device for conveniently adjusting the tension force of the present utility model.

[0025] In the figure: 1. First mounting bracket; 2. First driving motor; 3. First connecting gear; 4. Second connecting gear; 5. First rotating side plate; 6. First inner driving cavity; 7. First vertical limiting rod; 8. First sliding block; 9. Second mounting bracket; 10. Second driving motor; 11. Second rotating side plate; 12. Second inner driving cavity; 13. Rotating sleeve; 14. Rotating intermediate shaft; 15. First rotating bevel gear; 16. Second rotating bevel gear; 17. Central rotating shaft; 18. External driving thread; 19. Second vertical limiting rod; 20. Second sliding block; 21. Rectangular groove; 22. First roller; 23. Second roller; 24. Conveyor belt body. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0027] Please refer to Figure 1-8 , an embodiment provided by the present utility model: A conveyor belt tensioning device for conveniently adjusting the tension force, including:

[0028] 1. Basic structure: The first mounting bracket 1 and the second mounting bracket 9 are provided. They have the same structure. The first mounting bracket 1 and the second mounting bracket 9 are connected to the frame part of the conveying device and are used to support and fix the rotating components of the conveyor belt body 24.

[0029] 2. Main drive and transmission system: The first drive motor 2 is installed outside the first mounting bracket 1, and its output shaft end is connected to the first connecting gear 3. Inside the first mounting bracket 1, the second connecting gear 4 is installed along the lower end of the first connecting gear 3, and the two are meshed for transmission. A first rotating side plate 5 is coaxially fixed inside the second connecting gear 4, corresponding to the second rotating side plate 11 inside the second mounting bracket 9.

[0030] 3. Roller: The first roller 22 is installed at the upper end between the first rotating side plate 5 and the second rotating side plate 11, and the second roller 23 is installed at the lower end. The two are symmetrically arranged. The conveyor belt body 24 enters from the lower end of the second roller 23, passes through in an "S" shape between the two rollers and exits from the upper end of the first roller 22, forming an effective conveying path.

[0031] 4. Inner drive cavity and sliding block: The first inner drive cavity 6 and the second inner drive cavity 12 are respectively formed inside the first rotating side plate 5 and the second rotating side plate 11. Rectangular grooves 21 are opened at the upper and lower ends of the inner side surfaces of the first rotating side plate 5 and the second rotating side plate 11. The two groups of rectangular grooves 21 are respectively communicated with the inside of the first inner drive cavity 6 and the second inner drive cavity 12. The upper and lower ends inside the first inner drive cavity 6 are symmetrically provided with first sliding blocks 8. The sides of the first sliding blocks 8 pass through the rectangular grooves 21. The upper and lower ends inside the second inner drive cavity 12 are symmetrically provided with second sliding blocks 20. The sides of the second sliding blocks 20 pass through the rectangular grooves 21. The first roller 22 is rotatably connected between the upper first sliding block 8 and the upper second sliding block 20, and the second roller 23 is rotatably connected between the lower first sliding block 8 and the lower second sliding block 20, realizing the flexible rotation of the rollers.

[0032] 5. Auxiliary drive and transmission system: A rotating sleeve 13 is fixed outside the second rotating side plate 11. The other end of the rotating sleeve 13 is rotatably connected to the second mounting bracket 9 through a bearing. A second drive motor 10 is installed at the outer end of the second mounting bracket 9, and a rotating intermediate shaft 14 is installed at the output shaft end of the second drive motor 10.

[0033] The rotating intermediate shaft 14 passes through the rotating sleeve 13 and extends into the second inner drive cavity 12 and is connected to a first rotating bevel gear 15. A second rotating bevel gear 16 is arranged along the lower end of the first rotating bevel gear 15 inside the second inner drive cavity 12 and meshes with the first rotating bevel gear 15.

[0034] A central rotating shaft 17 passes through the second rotating bevel gear 16. The upper and lower ends of the central rotating shaft 17 are connected to the inner end faces of the second rotating side plates 11 through bearings. Symmetrically arranged at the upper and lower ends outside the central rotating shaft 17 are external drive threads 18, and the external drive threads 18 are threadedly connected to the second sliding blocks 20.

[0035] 6. Limiting and stabilizing structure: First vertical limiting rods 7 and second vertical limiting rods 19 are respectively fixed at the front and rear ends inside the first rotating side plates 5 and the second rotating side plates 11 to ensure that the first sliding blocks 8 and the second sliding blocks 20 remain stable during the sliding process and do not deviate from the track.

[0036] Realization of the double tensioning mechanism: The first-stage tensioning is achieved by driving the first connecting gear 3 to rotate through the first driving motor 2, driving the second connecting gear 4 to rotate through the meshing relationship, causing the first rotating side plates 5 and the second rotating side plates 11 to rotate, and then changing the contact areas of the first roller 22 and the second roller 23 with the conveyor belt body 24 to achieve the preliminary adjustment of the tensioning force.

[0037] When the first roller 22 and the second roller 23 rotate clockwise, the winding surface of the conveyor belt body 24 decreases, and the tension of the conveyor belt body 24 becomes smaller; when the first roller 22 and the second roller 23 rotate counterclockwise, the contact surfaces of the first roller 22 and the second roller 23 with the conveyor belt body 24 increase, and the tension of the conveyor belt body 24 increases.

[0038] When the first-stage tensioning does not yet meet the tensioning degree requirement, the second-stage tensioning is carried out.

[0039] The second-stage tensioning is achieved by driving the rotating intermediate shaft 14 to rotate through the second driving motor 10, driving the first rotating bevel gear 15 to rotate, driving the second rotating bevel gear 16 to rotate through the meshing relationship, and causing the central rotating shaft 17 to rotate. Due to the threaded connection relationship between the external drive threads 18 at the upper and lower ends outside the central rotating shaft 17 and the second sliding blocks 20, the two second sliding blocks 20 move outward simultaneously, driving the first roller 22 and the second roller 23 to move outward respectively to achieve the secondary tensioning of the conveyor belt body.

[0040] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A conveyor belt tensioning device for conveniently adjusting tensioning force, comprising a conveyor belt body (24), a first mounting bracket (1) and a second mounting bracket (9), wherein the first mounting bracket (1) and the second mounting bracket (9) have the same structure, and are characterized in that: A first drive motor (2) is mounted on the outer side of the first mounting bracket (1); a first connecting gear (3) is mounted on the inner side of the first mounting bracket (1) along the output shaft end of the first drive motor (2); a second connecting gear (4) is mounted on the inner side of the first mounting bracket (1) along the lower end of the first connecting gear (3); a first rotating side plate (5) is coaxially fixed on the inner side of the second connecting gear (4); a second rotating side plate (11) is connected to the inner side of the second mounting bracket (9); the first rotating side plate (5) and the second rotating side plate (11) are coaxially fixed to the inner side of the second connecting gear (4); The side plates (11) have the same external shape; a first roller (22) is installed at the upper end between the first rotating side plate (5) and the second rotating side plate (11); a second roller (23) is installed at the lower end between the first rotating side plate (5) and the second rotating side plate (11); the first roller (22) and the second roller (23) are symmetrically arranged; the conveyor belt body (24) enters from the lower end of the second roller (23), passes between the first roller (22) and the second roller (23) in an "S" shape, and passes out from the upper end of the first roller (22).

2. A conveyor belt tensioning device for conveniently adjusting tensioning force according to claim 1, characterized in that: A first inner driving chamber (6) and a second inner driving chamber (12) are formed inside the first rotating side plate (5) and the second rotating side plate (11), respectively; upper and lower ends of the inner surfaces of the first rotating side plate (5) and the second rotating side plate (11) are provided with rectangular grooves (21); two groups of the rectangular grooves (21) are connected to the inside of the first inner driving chamber (6) and the second inner driving chamber (12), respectively.

3. A conveyor belt tensioning device for conveniently adjusting tensioning force according to claim 2, characterized in that: A first sliding block (8) is symmetrically arranged at the upper and lower ends of the first inner driving cavity (6), and the side of the first sliding block (8) passes through the rectangular groove (21); a second sliding block (20) is symmetrically arranged at the upper and lower ends of the second inner driving cavity (12), and the side of the second sliding block (20) passes through the rectangular groove (21); a first roller (22) is rotatably connected between the first sliding block (8) at the upper end and the second sliding block (20) at the upper end, and a second roller (23) is rotatably connected between the first sliding block (8) at the lower end and the second sliding block (20) at the lower end.

4. A conveyor belt tensioning device for conveniently adjusting tensioning force according to claim 3, characterized in that: A rotating sleeve (13) is fixed on the outer side of the second rotating side plate (11); the other end of the rotating sleeve (13) is rotatably connected to the second mounting bracket (9) via a bearing; a second drive motor (10) is mounted on the outer end of the second mounting bracket (9); and a rotating intermediate shaft (14) is mounted on the output shaft end of the second drive motor (10).

5. A conveyor belt tensioning device for conveniently adjusting tensioning force according to claim 4, characterized in that: The rotating intermediate shaft (14) passes through the rotating sleeve (13) and extends to the inside of the second inner driving cavity (12) and is connected to the first rotating bevel gear (15). A second rotating bevel gear (16) is arranged inside the second inner driving cavity (12) along the lower end of the first rotating bevel gear (15), and the second rotating bevel gear (16) is meshed with the first rotating bevel gear (15).

6. A conveyor belt tensioning device for conveniently adjusting tensioning force according to claim 5, characterized in that: A central rotating shaft (17) passes through the second rotating bevel gear (16), and the upper and lower ends of the central rotating shaft (17) are connected to the inner end surface of the second rotating side plate (11) through bearings. The upper and lower ends of the outer side of the central rotating shaft (17) are symmetrically provided with external driving threads (18), and the external driving threads (18) are connected to the second sliding block (20) through threads.

7. A conveyor belt tensioning device for conveniently adjusting tensioning force according to claim 1, characterized in that: A first vertical limiting rod (7) is fixed at the front and rear ends inside the first rotating side plate (5), and the first sliding block (8) slides along the first vertical limiting rod (7); a second vertical limiting rod (19) is fixed at the front and rear ends inside the second rotating side plate (11), and the second sliding block (20) slides along the second vertical limiting rod (19).

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