CN217401618U

CN217401618U - Automatic tensioning device for transmission mechanism

Info

Publication number: CN217401618U
Application number: CN202220196029.1U
Authority: CN
Inventors: 张华伟; 李明; 陶迅; 李佳乐
Original assignee: Chengdu Dahongli Machinery Co Ltd
Current assignee: Chengdu Dahongli Machinery Co Ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-09-09
Anticipated expiration: 2032-01-25

Abstract

The utility model discloses an automatic tensioning device for drive mechanism relates to drive mechanism technical field, solve that current pinch roller lacks concrete mounting structure, pinch roller and can't become long and the technical problem that skids after using to drive belt auxiliary tensioning in the initial stage of lengthening and drive belt, overspeed device tensioner includes the inboard pinch roller of installing in the drive belt lower part through the bracket component, the bracket component includes the support body of being connected with the frame, vertical slidable mounting wheel seat and the upper and lower both ends respectively with the top of support body and the spring of the upper surface butt of wheel seat on the support body, the pinch roller rotates and sets up on the wheel seat. The utility model can not only pre-compress the spring and apply a pre-tightening force to the driving belt through the pressing wheel, so that the pressing wheel is stably contacted with the driving belt, and the situation that the pressing wheel is not installed in place due to manufacturing errors and installation errors is avoided; meanwhile, the pinch roller can be always in contact with the transmission belt based on the spring, so that the pinch roller is prevented from shaking, and the transmission belt is kept to run stably.

Description

Automatic tensioning device for transmission mechanism

Technical Field

The utility model relates to a drive mechanism technical field, more specifically relate to an automatic tensioning device technical field for drive mechanism.

Background

In a transmission mechanism, such as a device like a conveyor belt, the tightness degree of the conveyor belt is usually controlled by adjusting the center distance between a driving wheel and a driven wheel. However, there are two problems in the practical use process: 1. the belt body of the conveyor belt, namely the V-belt, can be gradually elongated after being used for a period of time, so that the wrap angle of the belt pulley is gradually reduced, the friction force of transmission is gradually reduced, and finally the belt body can slip; 2. after the conveyer belt was elongated, slight shake can appear in the mid portion of conveyer belt, can make the cornerite of action wheel and follow driving wheel be in the situation that changes always, if the belt pulley diameter is great, comparatively obvious shake will appear in the belt pulley, is unfavorable for the conveying operation to go on smoothly.

The conventional solution to the above problem is to increase the center distance between the driving wheel and the driven wheel by a manual or mechanical method to re-tension the belt. However, the mode of artificially finding and solving the problems has hysteresis, so that the belt body needs to be obviously elongated and fluctuated and then can be found by workers, and then the center distance is adjusted, so that the adjustment is untimely and the potential safety hazard is large.

In view of this, the prior art CN103662661A discloses an automatic adjusting device for belt tension of a coal feeder, in which a tension pulley is placed on the inner side of the lower part of the belt, and a proximity switch for collecting the position of the belt which is gravity-contacted via the tension pulley is installed on the outer side of the lower part of the belt. When the belt is elongated, its lower part moves down because of the tension pulley, triggers proximity switch then, and proximity switch triggers the relay closure, and the motor turns to electricity and rotates, and the motor rotates and drives the running of reduction gear, and the running of reduction gear drives the tightening rod and rotates, and the rotation of tightening rod makes the slider slide to the left side along the guide rail, drags the tensioning cylinder also to the left side and moves, finally plays increase action wheel and follows the distance between the driving wheel, adjusts the effect of feeder belt tension then.

However, this prior art does not disclose a structure of how the tension pulley is installed inside the lower portion of the belt and does not move. Meanwhile, the tension pulley in the prior art is only placed on the belt, and the belt cannot be tensioned in an auxiliary manner during the time when the belt is elongated and the triggering stroke of the proximity switch is reached, so that the belt cannot shake in the period, and the smooth operation of a transmission mechanism is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides an automatic tensioning device for drive mechanism to solve the tension pulley, promptly the utility model discloses an how the pinch roller is installed in the inboard structure of belt lower part to promote the convenience of pinch roller installation, maintain the convenience through this structure, can avoid the not in place circumstances of cooperation that installation error, manufacturing error lead to simultaneously effectively. Most importantly, the utility model discloses a this kind of pinch roller mounting structure can carry out supplementary tensioning to the belt, reduces the shake range that the belt is leaded to by the initial stage of elongation, promotes the stability of belt transport mechanism conveying.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model provides an automatic tensioning device for drive mechanism, is including arranging the inboard pinch roller of drive belt lower part in, the pinch roller passes through the bracket component to be installed in the inboard of drive belt lower part, the bracket component includes the wheel seat of support body, the vertical slidable mounting of being connected with the frame on the support body and upper and lower both ends respectively with the top of support body and the spring of the upper surface butt of wheel seat, the pinch roller rotates and sets up on the wheel seat.

Further, the support body includes vertical range and sets firmly two support frames in the frame and vertical setting guide rail between it, wheel seat movable sleeve establishes on the guide rail, the top of spring and the lower surface butt that is located the support frame of wheel seat top.

Furthermore, the guide rail has a plurality ofly, the spring cover is established on one or more of them guide rail.

Furthermore, the end part of the guide rail penetrates through the support frame and then is in threaded connection with the nut.

Furthermore, the wheel seat is arranged on the pressing wheel through a rotating assembly, the rotating assembly comprises a pressing wheel shaft and a bearing, one end of the pressing wheel shaft is fixedly arranged on the wheel seat, the bearing is arranged on the pressing wheel shaft, and the mounting hole of the pressing wheel is sleeved on the bearing and is in interference fit with the bearing.

Furthermore, the control system of the automatic tensioning device comprises a sensor for collecting the position information of the pressing wheel and a control unit for controlling the distance between the driving wheel and the driven wheel according to the position information collected by the sensor.

Further, the control unit comprises a controller and an actuator for pushing the driving wheel to move away from or close to the driven wheel, and the controller is in signal connection with the sensor and the actuator.

Further, the supporting seat of the driving wheel is installed on a sliding frame, the sliding frame is installed on the base in a sliding mode, and the driving end of the actuating element is connected with the sliding frame.

Furthermore, the actuating element is a hydraulic push rod which is fixedly arranged on the frame, and the tail end of a piston rod of the actuating element is connected with the sliding frame.

Further, the piston rod is connected with the sliding frame through a connecting assembly, the connecting assembly comprises a pin shaft and a cotter pin, and the small-diameter end of the pin shaft sequentially penetrates through one side of the sliding frame, the piston rod and the other side of the sliding frame and then is radially inserted into the cotter pin.

The utility model has the advantages as follows:

1. the tensioning device designed by the utility model can not only pre-compress the spring and apply a pre-tightening force to the transmission belt through the pressing wheel, so that the pressing wheel is stably contacted with the transmission belt, and the situation that the pressing wheel is not installed in place due to manufacturing errors and installation errors is avoided; meanwhile, based on the pre-compression amount, the pressing wheel can be always in contact with the transmission belt at the initial stage of elongation of the transmission belt, so that the transmission belt is prevented from shaking and is kept to run stably;

2. the guide rails can ensure that the pinch roller only moves in the vertical direction, so that the axis of the pinch roller is parallel to the axes of the driving wheel and the driven wheel, the contact stability between the pinch roller and the driving belt is improved, and the situations that the friction between the pinch roller and the driving belt is increased and the driving belt is abraded are avoided;

3. the tightness of the transmission belt is directly detected through the proximity switch, the distance between the driving wheel and the driven wheel is controlled by combining the controller with the execution element, manual detection and operation are not needed in the whole process, the tension of the transmission belt is timely adjusted through automatic detection and automatic adjustment, the situation that the tension belt slips due to side length after being used for a period of time is prevented, potential safety hazards caused by untimely adjustment are eliminated, and the safety of the transmission belt is improved;

4. a contact bearing is coaxially sleeved on the pin shaft, and the bottom of the contact bearing is in rolling contact with the plane of the mounting sliding frame, so that when the piston rod moves, the end part of the piston rod is in contact with the plane through the bearing arranged on the pin shaft to perform vertical rolling positioning support, and the smoothness of the extension of the piston rod is improved;

5. the sensor support includes the frame plate of being connected with the frame be provided with the through-hole that supplies the sensor tip to pass on the frame plate, the collection end of sensor passes behind the opening towards pinch roller or pinch roller axle, and the equal screw thread in both sides that lies in the frame plate on sensor housing has cup jointed set nut, can adjust the mounted position of sensor through the position of adjusting two nuts to adjust its and pinch roller or pinch roller axle's distance, so that its testing distance can directly be adapted to the position of the pinch roller of actually installing out, promote the utility model discloses an suitability.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the engagement of the press wheel with the drive belt;

FIG. 3 is a front view of the bracket assembly;

fig. 4 is a side view of a bracket assembly.

Reference numerals: 1-a transmission belt, 2-a pressing wheel, 3-a wheel seat, 4-a spring, 5-a support frame, 6-a guide rail, 7-a nut, 8-a pressing wheel shaft, 9-a sensor, 10-an actuating element, 11-a driving wheel, 12-a driven wheel, 13-a support seat, 14-a sliding frame, 15-a base, 16-a pin shaft, 17-a cotter pin and 18-a sensor support.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 4, this embodiment provides an automatic tensioning device for drive mechanism, including arranging pinch roller 2 of the inboard of 1 lower part in the drive belt in, pinch roller 2 passes through the bracket component to be installed in the inboard of 1 lower part in the drive belt, the bracket component includes that support body, the vertical slidable mounting of being connected with the frame take turns seat 3 and upper and lower both ends respectively with the top of support body and the spring 4 of the upper surface butt of wheel seat 3 on the support body, pinch roller 2 rotates and sets up on wheel seat 3.

The pinch roller 2 is pressed at any position of the inner side of the lower part of the transmission belt, is parallel to the axis of a driving wheel/a driven wheel for transmitting the transmission belt, and rotates around the axis of the pinch roller based on the friction drive brought by the transmission of the transmission belt, so that the friction force between the pinch roller and the transmission belt is reduced, and the friction loss is reduced.

The wheel seat is vertically and slidably mounted on the frame body 3, and the wheel seat can slide up and down on the frame body. The frame is a frame for supporting the transmission mechanism or a frame fixedly arranged on a bearing surface such as the ground.

The utility model relates to a overspeed device tensioner is when using, and the pinch roller bottom surface is with the inboard rolling contact of drive belt lower part, as shown in fig. 2, its top receives the downward thrust of spring 4 that comes from being in compression state to make its self produce decurrent thrust to drive belt 4, shake in order to prevent the drive belt when the operation, thereby make the drive belt keep moving steadily.

When the transmission belt is gradually stretched in the use process, the pressing wheel moves downwards along with the downward movement of the transmission belt, and meanwhile, the spring in a compressed state keeps pushing the pressing wheel downwards, so that the transmission belt is prevented from shaking caused by the fact that the transmission belt is gradually stretched in the use process.

When the downward movement distance of the pinch roller reaches a sensor triggering a proximity switch, a control system of the automatic tensioning device increases the distance between a driving wheel and a driven wheel of the transmission mechanism through the execution mechanism based on the signal so as to keep the transmission belt in a tensioning state.

The tensioning device designed by the utility model can not only pre-compress the spring and apply a pre-tightening force to the transmission belt through the pressing wheel, so that the pressing wheel is stably contacted with the transmission belt, and the situation that the pressing wheel is not installed in place due to manufacturing errors and installation errors is avoided; meanwhile, based on the pre-compression amount, the pressing wheel can be always contacted with the transmission belt at the initial stage of the elongation of the transmission belt, so that the vibration of the transmission belt is prevented, and the stable running of the transmission belt is kept.

Example 2

As for the structure of the rack body in embodiment 1, the following scheme is preferably adopted:

as shown in fig. 3 and 4, the frame body comprises two support frames 5 which are vertically arranged and fixedly arranged on the frame and a guide rail 6 which is vertically arranged between the two support frames, the wheel seat 3 is movably sleeved on the guide rail 6, and the top of the spring 4 is abutted against the lower surface of the support frame 5 which is positioned above the wheel seat 3.

The supporting frame 5 is a strip-shaped plate-shaped structure, the axis of the supporting frame is parallel to the axis of the pressing wheel, and one side of the supporting frame is welded or connected with the machine frame through screws.

Preferably, there are a plurality of the guide rails 6, and the spring 4 is sleeved on one or more of the guide rails 6. The pressing wheel can be guaranteed to move only in the vertical direction through the guide rails, so that the axis of the pressing wheel is parallel to the axis of the driving wheel and the axis of the driven wheel, the contact stability between the pressing wheel and the driving belt is improved, and the situations that the friction between the pressing wheel and the driving belt is increased and the driving belt is abraded are avoided.

The installation with respect to the guide rail 6 is in particular: the end of the guide rail 6 penetrates through the support frame 5 and then is in threaded connection with the nut 7, and the guide rail 6 is preferably a polished rod with a circular cross section.

Example 3

The following preferably applies in relation to the running fit between wheel base 3 and the pressure wheel: the wheel seat 3 is arranged on the pressing wheel 2 through a rotating assembly, the rotating assembly comprises a pressing wheel shaft 8 and a bearing, one end of the pressing wheel shaft 8 is fixedly arranged on the wheel seat 3, the bearing is arranged on the pressing wheel shaft 8, and a mounting hole of the pressing wheel 2 is sleeved on the bearing and is in interference fit with the bearing. The bearing is a rolling bearing such as a radial ball bearing, a cylindrical roller bearing, or the like. The rotating fit between the pressing wheel and the pressing wheel shaft is realized through the bearing, so that the friction force between the pressing wheel and the pressing wheel shaft can be effectively reduced, and the coaxiality between the pressing wheel and the pressing wheel shaft can be improved.

Example 3

Based on the designed pinch roller mounting structure, the control scheme of automatic tensioning is implemented as follows: the control system of the automatic tensioning device comprises a sensor 9 for acquiring the position information of the pinch roller 2 and a control unit for controlling the distance between a driving wheel 11 and a driven wheel 12 according to the position information acquired by the sensor 9. The sensor may employ an image recognition sensor, a distance sensor, or a proximity sensor. In this scheme, the sensor preferably adopts proximity switch, and it is used for gathering the proximity information of pinch roller or pinch roller axle. The control unit may employ a relay used in the prior art in the background art, that is, after the proximity switch is triggered, the relay starts the actuator to operate for a certain time, so as to increase the distance between the driving wheel 11 and the driven wheel 12.

In this example, the control unit specifically adopts the following embodiment: the control unit comprises a controller and an actuator 10 for pushing the driving wheel 11 away from or towards the driven wheel 12, the controller being in signal connection with the sensor 9 and the actuator 10. The controller can adopt a single chip microcomputer or a PLC and the like. The support base 13 of the driving wheel 11 is mounted on a carriage 14, the carriage 14 is slidably mounted on a base 15, and the driving end of the actuator 10 is connected with the carriage 14. The actuating element 10 is a hydraulic push rod, which is fixedly arranged on the frame, and the end of a piston rod of the hydraulic push rod is connected with the sliding frame 14.

After the transmission belt is gradually stretched in the using process, the pinch roller moves downwards along with the downward movement of the lower side of the transmission belt under the action of gravity and the deformation restoring force of the spring, after the pinch roller moves downwards to a triggering stroke, the proximity switch is triggered, the triggering information is sent to the controller, the controller starts the extension of a piston rod of the hydraulic push rod after receiving the information, so that the sliding frame 14 is pushed to slide, namely the driving wheel 11 is pushed to move towards the direction far away from the driven wheel 12, the distance between the driving wheel 11 and the driven wheel 12 is increased until the transmission belt is straightened, the pinch roller and the pinch roller shaft are driven to move upwards along with the straightening of the transmission belt, so that the distance between the pinch roller shaft and the proximity switch is increased until the safety value set by the proximity switch is reached, at the moment, the transmission belt is in a tensioning state, so that the normal operation of equipment is ensured, and the phenomenon that the transmission belt does not slide in the whole transmission process can be caused, and directly carry out the drive belt elasticity through proximity switch and detect to combine the executive component to control action wheel 11 and follow driving wheel 12 interval based on the controller, whole journey does not need artifical detection and operation, makes the tensioning regulation of drive belt in time go on through automated inspection automatic adjustment, prevents that the condition that the length of a side and skid after the tensioning belt uses a period from appearing, has eliminated the potential safety hazard that the regulation untimely leads to, promotes the security of drive belt.

The following is preferably used in connection with the connection between the piston rod and the skeleton: the piston rod is connected with the sliding frame 14 through a connecting assembly, the connecting assembly comprises a pin shaft 16 and a cotter 17, and the small-diameter end of the pin shaft 16 sequentially penetrates through one side of the sliding frame 14, the piston rod and the other side of the sliding frame 14 and then is radially inserted and connected by the cotter 17.

In order to improve the smoothness of the piston rod driving, a contact bearing is preferably coaxially sleeved on the pin shaft 16, the bottom of the contact bearing is in rolling contact with the plane of the mounting sliding frame 14, so that when the piston rod moves, the end part of the piston rod is in vertical rolling positioning support through the contact between the bearing mounted on the pin shaft and the plane, and the smoothness of the expansion and contraction of the piston rod is improved.

Sensor 9 passes through sensor support 18 and installs in the frame, as shown in fig. 2, sensor support includes the frame plate of being connected with the frame be provided with the through-hole that supplies the sensor tip to pass on the frame plate, orientation pinch roller or pinch roller axle behind the opening is passed to the collection end of sensor, and the equal screw thread in both sides that lies in the frame plate on sensor housing has cup jointed set nut, can adjust the mounted position of sensor through the position of adjusting two nuts to adjust its distance with pinch roller or pinch roller axle, so that its measuring distance can directly be adapted to the position of the pinch roller of actually installing, promote the utility model discloses an applicability.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an automatic tensioning device for drive mechanism, is including arranging pinch roller (2) of the inboard of drive belt (1) lower part in, its characterized in that, pinch roller (2) are installed in the inboard of drive belt (1) lower part through the bracket component, the bracket component includes support body, the vertical slidable mounting that are connected with the frame wheel seat (3) and upper and lower both ends respectively with the top of support body and spring (4) of the upper surface butt of wheel seat (3) on the support body, pinch roller (2) rotate and set up on wheel seat (3).

2. The automatic tensioning device for the transmission mechanism is characterized in that the frame body comprises two support frames (5) which are vertically arranged and fixedly arranged on the frame and a guide rail (6) vertically arranged between the two support frames, the wheel seat (3) is movably sleeved on the guide rail (6), and the top of the spring (4) is abutted to the lower surface of the support frame (5) above the wheel seat (3).

3. An automatic tensioning device for a transmission according to claim 2, characterized in that there are a plurality of said guides (6), said spring (4) being fitted over one or more of said guides (6).

4. The automatic tensioning device for the transmission mechanism according to claim 2, characterized in that the end of the guide rail (6) penetrates through the support frame (5) and is in threaded connection with the nut (7).

5. The automatic tensioning device for the transmission mechanism is characterized in that the wheel seat (3) is arranged on the pressing wheel (2) through a rotating assembly, the rotating assembly comprises a pressing wheel shaft (8) with one end fixedly arranged on the wheel seat (3) and a bearing arranged on the pressing wheel shaft (8), and a mounting hole of the pressing wheel (2) is sleeved on the bearing and is in interference fit with the bearing.

6. The automatic tensioning device for the transmission mechanism according to claim 1, characterized in that a control system of the automatic tensioning device comprises a sensor (9) for acquiring the position information of the pressure wheel (2) and a control unit for controlling the distance between the driving wheel (11) and the driven wheel (12) according to the position information acquired by the sensor (9).

7. Automatic tensioning device for transmission mechanisms according to claim 6, characterized in that the control unit comprises a controller and an actuator (10) that pushes the driving wheel (11) away from or towards the driven wheel (12), the controller being in signal connection with the sensor (9) and the actuator (10).

8. Automatic tensioning device for transmission mechanisms according to claim 7, characterized in that the support (13) of the driving wheel (11) is mounted on a carriage (14), the carriage (14) being slidably mounted on a base (15), the driving end of the actuator (10) being connected to the carriage (14).

9. The automatic tensioning device for transmission according to claim 7, characterized in that the actuating element (10) is a hydraulic push rod, which is fixed to the frame and the end of the piston rod of which is connected to the carriage (14).

10. The automatic tensioning device for the transmission mechanism according to claim 9, wherein the piston rod is connected with the carriage (14) through a connecting assembly, the connecting assembly comprises a pin shaft (16) and a cotter pin (17), and a small-diameter end of the pin shaft (16) sequentially passes through one side of the carriage (14), the piston rod and the other side of the carriage (14) and then is radially inserted by the cotter pin (17).