Automatic tension adjusting mechanism

Abstract

The utility model discloses an automatic tension adjusting mechanism, which relates to the technical field of tension adjustment for braid transmission, and comprises two fixing plates which are symmetrically distributed left and right, two guide components are symmetrically connected onto the two fixing plates, a fixing shaft is connected between the two guide components, and the fixing shaft is fixedly connected with the fixing plates. The peripheral face of the fixing shaft is rotationally sleeved with a tension roller, and the two fixing plates are connected with a speed monitoring assembly and a speed limiting assembly. The descending speed of the tension roller can be monitored in real time through the arranged speed monitoring assembly, and when the descending speed of the tension roller is too high, the descending speed of the tension roller can be reduced by the speed limiting assembly, so that the braid is prevented from quickly jumping and bending to the lowest position, and the braid is prevented from being damaged. The tension roller suddenly stops moving downwards along with downward movement of the braid to generate large impact force on the braid, so that the braid is protected from being damaged or even broken due to large impact, and the reliability and the safety of the tension adjusting mechanism are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tension adjustment for belt transmission, in particular to an automatic tension adjustment mechanism. BACKGROUND

[0002] Belt is a kind of narrow or tubular fabric made of various yarns, widely used in clothing, shoe material, luggage, industry, agriculture, military and transportation fields, and the raw materials of belt include cotton thread, hemp thread, nylon, vinylon, polyester, polypropylene, spandex and viscose, and the manufacturing process mainly includes weaving, braiding and knitting.

[0003] Belt is a kind of narrow or tubular fabric made of various yarns, widely used in clothing, shoe material, luggage, industry, agriculture, military and transportation fields, and the raw materials of belt include cotton thread, hemp thread, nylon, vinylon, polyester, polypropylene, spandex and viscose, and the manufacturing process mainly includes weaving, braiding and knitting.

[0004] When the belt is conveyed by the conveying roller, the speed of the multiple conveying rollers is difficult to adjust to the same, so the belt is prone to relaxation during conveying, which may cause the belt to wrinkle during conveying and reduce the quality of the belt. Therefore, a tension roller is used to provide tension compensation to ensure that the belt is always in a tight state during conveying to avoid wrinkles and scratches on the belt. However, the existing tension roller mainly provides tension compensation through its own gravity, which causes the tension roller to rise and fall rapidly when the belt jumps rapidly during conveying. This causes the tension roller to generate a large impact force on the belt, which may damage or even break the belt, seriously reducing the reliability of the tension compensation device.

[0005] To solve the above problems, an automatic tension adjustment mechanism is needed. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing an automatic tension adjustment mechanism to solve the problem that the existing tension compensation device may cause strong impact on the belt when the belt jumps rapidly, which may damage or even break the belt, seriously reducing the reliability of the tension compensation device.

[0007] To achieve the above object, the utility model provides the following technical scheme: an automatic tension adjusting mechanism, including two fixed plates which are symmetrically distributed, two guide assemblies are symmetrically connected on the two fixed plates, a fixed shaft is connected between the two guide assemblies, a tension roller is rotatably sleeved on the outer circumferential surface of the fixed shaft, a speed monitoring assembly and a speed limiting assembly are connected on the two fixed plates, and the speed monitoring assembly and the speed limiting assembly are electrically connected;

[0008] The speed monitoring assembly is used for monitoring the descending speed of the tension roller.

[0009] The speed limiting assembly is used for adjusting the descending speed of the tension roller.

[0010] Preferably, the guide assembly comprises two rectangular cavities symmetrically opened on the side surfaces of the two fixed plates, two pairs of vertical guide rods are symmetrically fixedly connected between the inner top wall and the inner bottom wall of the two rectangular cavities, two lifting blocks are symmetrically movably sleeved between the outer circumferential surfaces of the two pairs of vertical guide rods, two groups of first elastic members are symmetrically fixedly connected between the bottoms of the two lifting blocks and the inner bottom walls of the two rectangular cavities, and the left and right ends of the fixed shaft are fixedly connected on the side surfaces of the two lifting blocks close to each other.

[0011] Preferably, the speed monitoring assembly comprises two mounting blocks symmetrically fixed on the sides of the two lifting blocks, two swing plates symmetrically rotatably connected on the front and back sides of the two mounting blocks through first rotating rods and first torsion springs, two pairs of trigger blocks symmetrically fixed on the sides of the two pairs of swing plates, two pairs of pressure sensors symmetrically fixed on the front and back inner side walls of the two rectangular cavities, and two groups of rotating seats symmetrically fixed on the front and back inner side walls of the two rectangular cavities, each group of rotating seats comprising two rows of rotating seats symmetrically distributed on the front and back, and each group of two rows of rotating seats being symmetrically rotatably connected with two groups of swing plates through second rotating rods and second torsion springs, the two groups of swing plates being in a spread shape, and the two pairs of swing plates being capable of being in contact with the two groups of swing plates, respectively. In this way, when the belt rapidly jumps, the tension roller drives the mounting blocks to rapidly move downward, the swing plates rapidly pass through the two groups of swing plates, the swing plates swing faster, the impact force of the trigger blocks on the pressure sensors increases, the pressure sensors transmit signals to the central processor, the central processor controls the speed limiting assembly to reduce the descending speed of the lifting blocks, the tension roller does not suddenly stop descending after the belt downwardly bends to the lowest point, the belt is not subjected to a relatively violent impact, the safety of the belt is protected, the belt is not damaged or broken, and the reliability and safety of the tension adjusting mechanism are improved.

[0012] Preferably, the speed monitoring assembly further comprises two pairs of elastic telescopic rods symmetrically fixed on the sides of the two pairs of swing plates, one end of each of the two pairs of elastic telescopic rods being fixedly connected with the two pairs of trigger blocks. In this way, the elastic telescopic rods can cooperate with the first torsion springs to rapidly reset the swing plates to positions far away from the mounting blocks after the swing plates are rotated to positions closest to the mounting blocks, the swing plates can stably and orderly drive the trigger blocks to impact the pressure sensors, the descending speed of the tension roller is effectively and reliably monitored, the stable adjustment and control of the size of the tension compensation of the tension roller on the belt are completed.

[0013] Preferably, the speed limiting assembly comprises two pairs of rollers symmetrically fixed on the front and rear sides of the two lifting blocks, and further comprises two groups of electric push rods symmetrically fixed in the two rectangular cavities, each group of the electric push rods comprises two rows of electric push rods symmetrically fixed on the front and rear inner side walls of the rectangular cavities, and two friction plates are symmetrically connected to the output ends of the two rows of electric push rods, and the sides close to each other of the two pairs of friction plates are respectively in contact with the outer circumferential surfaces of the two pairs of rollers.

[0014] Preferably, the speed limiting assembly further comprises two pairs of vertical plates symmetrically fixed on the output ends of the four rows of electric push rods, four groups of insertion rods are symmetrically movably inserted on the sides away from each other of the two pairs of friction plates, one ends of the four groups of insertion rods away from each other are fixed on the sides close to each other of the two pairs of vertical plates, and second elastic members are fixed between the sides close to each other of the two pairs of vertical plates and the two pairs of friction plates, so that the insertion rods and the second elastic members can increase the adjustment progress of the friction between the friction plates and the rollers, thereby more finely and flexibly controlling the tension compensation of the tension roller to the belt.

[0015] In summary, the technical effects and advantages of the utility model are as follows:

[0016] 1、The speed monitoring assembly can monitor the descending speed of the tension roller in real time, when the descending speed of the tension roller is too fast, the speed limiting assembly can reduce the descending speed of the tension roller, thereby avoiding that the belt is rapidly bounced and bent to the lowest position, and the tension roller is suddenly stopped from moving downward to generate a large impact force to the belt, the belt is protected from being damaged or broken, and the reliability and safety of the tension adjusting mechanism are improved.

[0017] 2、When the belt is rapidly bounced, the tension roller drives the mounting block to rapidly move downward, the swing plate rapidly passes through the two groups of rotating plates, the swing plate swings left and right at a faster speed, the impact force of the trigger block to the pressure sensor is increased, the pressure sensor transmits a signal to the central processing unit, the central processing unit controls the speed limiting assembly to reduce the descending speed of the lifting block, thereby avoiding that the tension roller is rapidly descended, and after the belt is bent downward to the lowest point, the tension roller is suddenly stopped to generate a violent impact to the belt, the safety of the belt is protected, the belt is prevented from being damaged or broken, and the reliability and safety of the tension adjusting mechanism are improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the following description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 It is a structural schematic diagram of the present application;

[0020] Figure 2 It is a first partial structural schematic diagram of the present application;

[0021] Figure 3 It is a second partial structural schematic diagram in the present application;

[0022] Figure 4 It is a third partial structural schematic diagram in the present application;

[0023] Figure 5 It is a structural schematic diagram in the present application Figure 3 It is an enlarged schematic diagram of A in the present application;

[0024] Figure 6 It is an enlarged schematic diagram of B in the present application. Figure 4

[0025] In the figure: 1, fixed plate; 2, guide assembly; 21, rectangular cavity; 22, vertical guide rod; 23, lifting block; 24, first elastic member; 3, fixed shaft; 4, tension roller; 5, speed monitoring assembly; 51, mounting block; 52, swing plate; 53, trigger block; 54, pressure sensor; 55, rotating seat; 56, rotating plate; 57, elastic telescopic rod; 6, speed limiting assembly; 61, roller; 62, electric push rod; 63, friction plate; 64, vertical plate; 65, insertion rod; 66, second elastic member. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figures 1-6 ​The automatic tension adjusting mechanism shown comprises two fixed plates 1 symmetrically distributed left and right, two guide assemblies 2 are symmetrically connected on the two fixed plates 1, a fixed shaft 3 is connected between the two guide assemblies 2, a tension roller 4 is rotatably sleeved on the outer circumferential surface of the fixed shaft 3, a speed monitoring assembly 5 and a speed limiting assembly 6 are connected on the two fixed plates 1, and the speed monitoring assembly 5 and the speed limiting assembly 6 are electrically connected;

[0028] The speed monitoring assembly 5 is used for monitoring the descending speed of the tension roller 4.

[0029] The speed limiting assembly 6 is used for adjusting the descending speed of the tension roller 4.

[0030] With reference to Figures 1-4 The guide assembly 2 comprises two rectangular cavities 21 symmetrically formed on the side surfaces of the two fixed plates 1, two pairs of vertical guide rods 22 are symmetrically and fixedly connected between the inner top walls and the inner bottom walls of the two rectangular cavities 21, two lifting blocks 23 are symmetrically and movably sleeved between the outer circumferential surfaces of the two pairs of vertical guide rods 22, two groups of first elastic members 24 are symmetrically and fixedly connected between the bottoms of the two lifting blocks 23 and the inner bottom walls of the two rectangular cavities 21, and the left and right ends of the fixed shaft 3 are respectively fixedly connected on the side surfaces of the two lifting blocks 23 close to each other.

[0031] Specifically, the two lifting blocks 23 move up and down along the two pairs of vertical guide rods 22 and cooperate with the two groups of first elastic members 24, so that the tension roller 4 moves up and down to provide stable tension compensation for the woven belt, so that the woven belt can be stably conveyed forward, and wrinkles and bends caused by relaxation of the woven belt are avoided.

[0032] With reference to Figures 3-5 The speed monitoring assembly 5 comprises two mounting blocks 51 symmetrically and fixedly connected on the side surfaces of the two lifting blocks 23 close to each other, two swing plates 52 are symmetrically and rotatably connected on the front and rear side surfaces of the two mounting blocks 51 through first rotating rods and first torsion springs, two pairs of trigger blocks 53 are symmetrically and fixedly connected on the side surfaces of the two pairs of swing plates 52 close to each other, the speed monitoring assembly 5 further comprises two pairs of pressure sensors 54 symmetrically and fixedly connected on the front and rear inner side walls of the two rectangular cavities 21, and the speed monitoring assembly 5 further comprises two groups of rotating seats 55 symmetrically and fixedly connected on the front and rear inner side walls of the two rectangular cavities 21, each group of rotating seats 55 is composed of two rows of rotating seats 55 symmetrically distributed front and rear, and two groups of rotating plates 56 are symmetrically and rotatably connected on the side surfaces of each group of two rows of rotating seats 55 through second rotating rods and second torsion springs. The two groups of rotating plates 56 are distributed in an eight-character shape, the two pairs of swing plates 52 are distributed in an eight-character shape, and the two pairs of swing plates 52 can respectively and abut the two groups of rotating plates 56.

[0033] Specifically, when the weaving belt is rapidly jumping, the tension roller 4 drives the mounting block 51 to move downward rapidly, at this time, the swing plate 52 rapidly passes through the two groups of rotating plates 56, so that the swing plate 52 swings left and right at a faster speed, so that the impact force of the trigger block 53 on the pressure sensor 54 is increased, and then the pressure sensor 54 transmits a signal to the central processor, and then the central processor controls the speed limiting assembly 6 to reduce the descending speed of the lifting block 23, thereby avoiding that the tension roller 4 suddenly stops descending after the weaving belt is downwardly bent to the lowest point after the tension roller 4 rapidly descends, and a relatively strong impact on the weaving belt is generated, so that the safety of the weaving belt is protected, the weaving belt is prevented from being damaged or broken, and the reliability and safety of the tension adjusting mechanism are improved.

[0034] With reference to Figure 5 The speed monitoring assembly 5 further comprises two pairs of elastic extension rods 57 which are symmetrically and fixedly connected to the sides close to the two pairs of swing plates 52, and one end of each of the two pairs of elastic extension rods 57 is fixedly connected to the two pairs of trigger blocks 53.

[0035] Specifically, the elastic extension rod 57 can be reset to the direction away from the mounting block 51 after the swing plate 52 is rotated to the position closest to the mounting block 51 by the elastic force of the elastic extension rod 57 and the first torsional spring, so that the swing plate 52 can stably and orderly drive the trigger block 53 to impact the pressure sensor 54, so as to ensure effective and reliable monitoring of the descending speed of the tension roller 4, thereby completing stable adjustment and control of the size of the tension compensation of the weaving belt by the tension roller 4.

[0036] With reference to Figures 3-6 The speed limiting assembly 6 comprises two pairs of rollers 61 which are symmetrically and fixedly connected to the front and rear sides of the two lifting blocks 23, and further comprises two groups of electric push rods 62 which are symmetrically and fixedly connected in the two rectangular cavities 21, each group of electric push rods 62 comprises two rows of electric push rods 62 which are symmetrically and fixedly connected to the inner side walls of the front and rear of the rectangular cavity 21, and two friction plates 63 are symmetrically connected to the output ends of the two rows of electric push rods 62, and the sides close to the two pairs of friction plates 63 can respectively abut against the outer circumferential surfaces of the two pairs of rollers 61.

[0037] Specifically, the central processor adjusts the extension distance of the electric push rod 62 according to the pressure value of the pressure sensor 54 received, so as to adjust the friction force between the friction plate 63 and the roller 61, and then adjust the reduction range of the descending speed of the tension roller 4, and then effectively and reliably adjust the size of the tension compensation of the weaving belt by the tension roller 4.

[0038] With reference to Figure 6The speed limiting assembly 6 further comprises two pairs of vertical plates 64 symmetrically fixed on the output ends of the four electric push rods 62, four groups of insertion rods 65 are symmetrically movably inserted on the sides of the two pairs of friction plates 63 away from each other, the ends of the four groups of insertion rods 65 away from each other are fixed on the sides of the two pairs of vertical plates 64 close to each other, and the second elastic members 66 are fixed between the sides of the two pairs of vertical plates 64 and the two pairs of friction plates 63 close to each other.

[0039] Specifically, by means of the insertion rods 65 cooperating with the second elastic members 66, the progress of the friction force adjustment between the friction plates 63 and the rollers 61 can be increased, so that the tension compensation size of the tension roller 4 on the webbing can be more finely and flexibly controlled.

[0040] Working principle: when the webbing around the bottom of the tension roller 4 rapidly jumps in the conveying process, the webbing will rapidly bend downward, and when the webbing bends downward to the lowest point, it will rapidly stop bending downward and reset upward.

[0041] When the webbing rapidly bends downward, the tension roller 4 will synchronously rapidly move downward under the action of its own gravity, at this time, the tension roller 4 will drive the mounting block 51 to rapidly move downward, at this time, the swing plate 52 will rapidly pass through the two groups of rotating plates 56, so that the swing plate 52 swings left and right at a faster speed, so that the impact force of the trigger block 53 on the pressure sensor 54 is increased, and then the pressure sensor 54 transmits the signal to the central processor.

[0042] Then, the central processor adjusts the extension distance of the electric push rod 62 according to the pressure value of the pressure sensor 54 received, so as to adjust the friction force between the friction plates 63 and the rollers 61, and then adjust the reduction amplitude of the downward speed of the tension roller 4, effectively flexibly and reliably adjust the tension compensation size of the tension roller 4 on the webbing, so as to avoid that after the tension roller 4 rapidly descends, the tension roller 4 suddenly stops descending after the webbing bends downward to the lowest point, and a relatively violent impact on the webbing is generated, so that the safety of the webbing can be protected, the webbing is prevented from being damaged or broken, and the reliability and safety of the tension adjusting mechanism are improved.

[0043] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An automatic tension adjustment mechanism, comprising two fixed plates (1) symmetrically distributed on the left and right sides, characterized in that: Two guide components (2) are symmetrically connected on the two fixed plates (1), and a fixed shaft (3) is connected between the two guide components (2). A tension roller (4) is rotatably sleeved on the outer circumferential surface of the fixed shaft (3). A speed monitoring component (5) and a speed limiting component (6) are connected on the two fixed plates (1), and the speed monitoring component (5) and the speed limiting component (6) are electrically connected. The speed monitoring component (5) is used to monitor the descent speed of the tension roller (4); The speed limiting component (6) is used to adjust the descent speed of the tension roller (4).

2. The automatic tension adjustment mechanism according to claim 1, characterized in that: The guide assembly (2) includes two rectangular cavities (21) symmetrically opened on the sides of two fixed plates (1). Two pairs of vertical guide rods (22) are symmetrically fixedly connected between the inner top wall and the inner bottom wall of the two rectangular cavities (21). Two lifting blocks (23) are symmetrically and movably sleeved between the outer peripheral surfaces of the two pairs of vertical guide rods (22). Two sets of first elastic elements (24) are symmetrically fixedly connected between the bottom of the two lifting blocks (23) and the inner bottom wall of the two rectangular cavities (21). The left and right ends of the fixed shaft (3) are respectively fixedly connected to the sides of the two lifting blocks (23) that are close to each other.

3. The automatic tension adjustment mechanism according to claim 2, characterized in that: The speed monitoring component (5) includes two mounting blocks (51) symmetrically fixedly connected to the adjacent sides of two lifting blocks (23). Two swing plates (52) are symmetrically rotatably connected to the front and rear sides of the two mounting blocks (51) via a first rotating rod and a first torsion spring. Two pairs of trigger blocks (53) are symmetrically fixedly connected to the adjacent sides of the two pairs of swing plates (52). The speed monitoring component (5) also includes two pairs of pressure sensors (54) symmetrically fixedly connected to the front and rear sides of the two mounting blocks (51). The component (5) also includes two sets of rotating seats (55) symmetrically fixedly connected to the inner walls of the front and rear of the two rectangular cavities (21). Each set of rotating seats (55) consists of two rows of rotating seats (55) symmetrically distributed in front and rear. On the side of the two rows of rotating seats (55) in each set, two sets of rotating plates (56) are symmetrically rotatably connected by a second rotating rod and a second torsion spring. The two sets of rotating plates (56) are arranged in a figure-eight shape. The two pairs of swing plates (52) are arranged in a figure-eight shape. The two pairs of swing plates (52) can contact the two sets of rotating plates (56) respectively.

4. The automatic tension adjustment mechanism according to claim 3, characterized in that: The speed monitoring component (5) also includes two pairs of elastic telescopic rods (57) symmetrically fixedly connected to the adjacent sides of the two pairs of swing plates (52), and the adjacent ends of the two pairs of elastic telescopic rods (57) are respectively fixedly connected to the two pairs of trigger blocks (53).

5. An automatic tension adjustment mechanism according to claim 4, characterized in that: The speed limiting component (6) includes two pairs of rollers (61) symmetrically fixedly connected to the front and rear sides of the two lifting blocks (23). The speed limiting component (6) also includes two sets of electric push rods (62) symmetrically fixedly connected to the two rectangular cavities (21). Each set of electric push rods (62) consists of two rows of electric push rods (62) symmetrically fixedly connected to the front and rear inner sidewalls of the rectangular cavity (21). Two friction plates (63) are symmetrically connected to the output ends of the two rows of electric push rods (62). The sides of the two pairs of friction plates (63) that are close to each other can respectively abut against the outer peripheral surfaces of the two pairs of rollers (61).

6. The automatic tension adjustment mechanism according to claim 5, characterized in that: The speed limiting component (6) also includes two pairs of vertical plates (64) symmetrically fixedly connected to the output ends of the four rows of electric push rods (62). Four sets of insert rods (65) are symmetrically and movably inserted into the opposite sides of the two pairs of friction plates (63). The opposite ends of the four sets of insert rods (65) are respectively fixedly connected to the opposite sides of the two pairs of vertical plates (64). A second elastic element (66) is fixedly connected between the opposite sides of the two pairs of vertical plates (64) and the opposite sides of the two pairs of friction plates (63).

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