CN111153120A

CN111153120A - Chain tensioning mechanism for power and free conveyor

Info

Publication number: CN111153120A
Application number: CN202010064366.0A
Authority: CN
Inventors: 王磊; 黄海; 李志强; 卿小芳; 石海波; 邓日锟
Original assignee: Guangzhou Deheng Auto Equipment Science & Technology Co ltd
Current assignee: Guangzhou Deheng Auto Equipment Science & Technology Co ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-05-15

Abstract

The invention discloses a chain tensioning mechanism for a power and free conveyor. A chain tensioning mechanism for a stacking conveyor comprises a chain tensioning device; the chain tensioning device comprises a driven wheel, a chain hung on the driven wheel and meshed and connected with the driven wheel, and bearing seats respectively arranged on two sides of a machine body of the accumulation conveyor, wherein a bearing is mounted on each bearing seat, two ends of a driven shaft of the accumulation conveyor penetrate through a bent plate of the machine body and are respectively fixed at the end parts of the two bearings, and the driven wheel is fixed on the driven shaft. The chain tensioning mechanism for the accumulation conveyor is convenient to install and debug and low in manufacturing cost.

Description

Chain tensioning mechanism for power and free conveyor

Technical Field

The invention relates to the technical field of conveying of manufactured workpieces, in particular to a chain tensioning mechanism for a power and free conveyor.

Background

The power and free conveyor is mainly used for automatic production and manufacturing of equipment for conveying workpieces, the power and free conveyor is provided with transmission force by a chain, a chain tensioning mechanism of the power and free conveyor is an important component of the power and free conveyor, the tightness of the transmission chain is adjusted by the chain tensioning mechanism to ensure safe and stable operation of chain transmission, but most of the existing chain tensioning mechanisms for the power and free conveyor are manually adjusted, installation and debugging have high requirements on skills of workers, the chain tensioning mechanism is difficult to maintain and adapt to requirements of full-automatic production and manufacturing, at present, although a few power and free conveyors adopt the tensioning mechanisms for automatic adjustment of the chain, the existing tensioning mechanisms for automatic adjustment of the chain are complex in structure and high in cost, and accordingly investment cost of user equipment is high.

How to solve the above problems is a technical problem to be solved urgently.

Disclosure of Invention

The invention aims to provide a chain tensioning mechanism for a stacking conveyor, which is convenient to install and debug and low in manufacturing cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a chain tensioning mechanism for a power and free conveyor, which comprises a chain tensioning device, wherein the chain tensioning device comprises a chain tensioning mechanism; the chain tensioning device comprises a driven wheel, a chain hung on the driven wheel and meshed and connected with the driven wheel, and bearing seats respectively arranged on two sides of a machine body of the accumulation conveyor, wherein a bearing is mounted on each bearing seat, two ends of a driven shaft of the accumulation conveyor penetrate through a bent plate of the machine body and are respectively fixed at the end parts of the two bearings, and the driven wheel is fixed on the driven shaft. The chain is meshed with the driven wheel, the bearing seats at the left end and the right end of the driven shaft push the driven shaft, the driven shaft moves and drives the driven wheel, and therefore the driven wheel tightens or loosens the chain to achieve tightening or loosening of the chain.

Furthermore, the chain tensioning device also comprises a fixed seat, a push rod assembly and an adjusting seat, wherein the bearing seat is fixed on the adjusting seat, the adjusting seat is connected with the bending plate through a first screw, an adjusting block is arranged on the adjusting seat, a fixed block is arranged on the fixed seat, and two ends of the push rod assembly are respectively connected with the adjusting block and the fixed block; the adjusting seat is provided with a waist-shaped hole, a screw passes through the waist-shaped hole and is in threaded connection with a threaded hole in the bending plate, the adjusting seat is fixed on the bending plate when the screw is screwed down, and the adjusting seat can move relative to the bending plate when the screw is unscrewed, so that a bearing seat on the adjusting seat moves along with the movement and pushes a driven shaft, and the position of the adjusting seat relative to the machine body of the stacking conveyor can be adjusted.

Furthermore, the push rod assembly comprises a push rod and a pre-tightening spring sleeved on the push rod, the head end and the tail end of the push rod are respectively connected with the adjusting block and the fixing block, the pre-tightening spring is positioned between the adjusting block and the fixing block, and two ends of the pre-tightening spring are respectively contacted with the adjusting block and the fixing block; the head end of the push rod moves in the hole of the adjusting block and is limited by the adjusting block, the tail end of the push rod is in threaded connection with the hole of the fixing block, the pre-tightening spring of the push rod assembly is located between the adjusting block and the fixing block, one end of the pre-tightening spring is in contact with the adjusting block, and the other end of the pre-tightening spring is in contact with the cushion block of the push rod assembly.

Furthermore, a scale is arranged on the adjusting block, a cushion block capable of being matched with the scale is connected to one end, which is in contact with the fixed block, of the pre-tightening spring, and the cushion block is sleeved on the push rod; the cushion block is provided with a V-shaped groove, the tail end of the scale is provided with a pointer protruding outwards, when the chain needs to be tensioned, the push rod is twisted, the push rod moves forwards, the pre-tightening spring is compressed, when the V-shaped groove in the cushion block at the tail end of the pre-tightening spring is aligned with the pointer on the scale, the tensioning degree of the chain reaches a preset value, the push rod is stopped being twisted, and the chain is tensioned.

Furthermore, the tail end of the head end of the push rod is provided with a C-shaped snap ring and a stop block which are matched with each other and used for preventing the head end of the push rod from being separated from the adjusting block; the adjusting block is used for preventing the head end of the push rod from separating from the adjusting block and preventing the pre-tightening spring from losing tension.

Further, the chain tensioning device also comprises a guide block for assisting the movement of the adjusting seat, and the guide block is connected with a threaded hole in the bending plate through a second screw; the guide block can assist the adjusting seat to move, so that the adjusting seat can run stably.

Furthermore, a sensor mounting plate is fixed on the guide block, a sensor is arranged on the sensor mounting plate, an induction block capable of being matched with the sensor is arranged at the tail end of the driven shaft, and the sensor is connected with a controller on a power and free conveyor; when the chain is worn after long-term use, the length of the chain is lengthened and loosened, so that the tension applied to the driven shaft is reduced, therefore, the driven shaft can move outwards, the induction block fixed at the tail end of the driven shaft approaches to the sensor, the chain is further abraded along with the increase of the service time of the chain, the induction block fixed at the tail end of the driven shaft further approaches to the sensor, when the position of the induction block reaches the tensioning limit position of the chain, the sensor can induce the induction block, then the signal is sent to a controller of the accumulation conveyor, the controller carries out corresponding processing according to the received signal, and then carries out sound-light alarm, display and the like, the power and free conveyor can send out audible and visual alarm signals and play fault display pictures and the like, so that the staff is prompted to seriously wear the chain and reach the standard of replacing the chain, and the normal use of the power and free conveyor can be ensured only by replacing the chain.

Due to the adoption of the structure, the invention has the following beneficial effects:

according to the chain tensioning mechanism for the accumulation conveyor, the driven wheel is fixed on the driven shaft and meshed with the driven wheel, the driven shaft is pushed to move through the bearing seats at the left end and the right end of the driven shaft, so that the driven shaft moves outwards and drives the driven wheel on the driven shaft to move outwards together, the tensioning of the chain is realized, the bearing seats push the driven shaft to move inwards, the driven wheel on the driven shaft is driven to move inwards together, the chain is loosened, and the loosening of the chain is realized.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

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

FIG. 2 is a schematic view of the pushrod assembly of the present invention;

FIG. 3 is a schematic view of the initial tensioning process of the present invention;

FIG. 4 is a schematic representation of the tensioning process of the chain of the present invention after wear; and the number of the first and second groups,

figure 5 is a schematic view of the extreme tensioning position of the present invention.

In the drawings, 1, a chain tensioner; 2. a driven shaft; 3. a chain; 4. a body; 5. a driving wheel; 101. a fixed seat; 102. a scale; 103. an adjusting seat; 1031. a bearing seat; 104. a guide block; 105. a sensor mounting plate; 106. a sensor; 107. bending the plate; 108. an induction block; 109. a stopper; 110. a first screw; 111. an adjusting block; 112. a second screw; 113. a fixed block; 114. a push rod assembly; 1141. a push rod; 1142. cushion blocks; 1143. pre-tightening the spring; 1144. a guide sleeve; 1145. a C-shaped snap ring; 115. a bearing; A. the tail end of the push rod; B. a pusher head end.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a chain tensioning mechanism for a stacking conveyor according to the present invention includes a chain tensioning device 1; the chain tensioning device 1 comprises a driven wheel 5, a chain 3 hung on the driven wheel 5 and engaged with the driven wheel 5, and bearing seats 1031 respectively arranged at two sides of a body 4 of the accumulation conveyor, wherein a bearing 115 is arranged on each bearing seat 1031, two ends of a driven shaft 2 of the accumulation conveyor penetrate through a bent plate 107 of the body 4 and are respectively fixed at the end parts of the two bearings 115, and the driven wheel 5 is fixed on the driven shaft 2; the chain 3 is engaged with the driven wheel 5, and the bearing seats 1031 at the left and right ends of the driven shaft 2 can push the driven shaft 2, so that the driven wheel 5 mounted on the driven shaft 2 moves synchronously, and then the driven wheel 5 tensions or loosens the chain 3 to tension or loosen the chain 3.

In the invention, the chain tensioning device 1 further comprises a fixed seat 101, a push rod assembly 114 and an adjusting seat 103, a bearing seat 1031 is fixed on the adjusting seat 103, the adjusting seat 103 is connected with a bending plate 107 through a first screw 110, an adjusting block 111 is arranged on the adjusting seat 103, a fixing block 113 is arranged on the fixed seat 101, the fixing block 113 is positioned behind the adjusting block 111, and two ends of the push rod assembly 114 are respectively connected with the adjusting block 111 and the fixing block 113; the adjusting seat 103 is provided with a kidney-shaped hole, a screw passes through the kidney-shaped hole to be in threaded connection with a threaded hole on the bending plate 107, when the screw is screwed down, the adjusting seat 103 is fixed on the bending plate 107, when the screw is unscrewed, the adjusting seat 103 can move relative to the bending plate 107, and the bearing seat 1031 fixed on the adjusting seat 103 moves along with the movement and pushes the driven shaft 2, so that the position of the adjusting seat 103 relative to the machine body 4 of the stacking conveyor can be adjusted.

In the invention, the push rod assembly 114 comprises a push rod 1141 and a pre-tightening spring 1143 sleeved on the push rod 1141, the push rod head end B and the push rod tail end A of the push rod 1141 are respectively connected with the adjusting block 111 and the fixing block 113, the pre-tightening spring 1143 is positioned between the adjusting block 111 and the fixing block 113, and two ends of the pre-tightening spring 1143 are respectively contacted with the adjusting block 111 and the fixing block 113; the head end B of the push rod 1141 can move in the hole of the adjusting block 111 and is limited by the adjusting block 111, the tail end a of the push rod 1141 is in threaded connection with the hole of the fixing block 113, one end of the pre-tightening spring 1143 is in contact with the adjusting block 111, and the other end of the pre-tightening spring 1143 is in contact with the pad 1142 of the push rod assembly 114.

According to the invention, a scale 102 is arranged on an adjusting block 111, a cushion block 1142 capable of being matched with the scale 102 is connected to one end, which is contacted with a fixed block 113, of a pre-tightening spring 1143, the cushion block 1142 is sleeved on a flange at the middle part of a push rod 1141, a V-shaped groove is arranged on the cushion block 1142, an outward convex pointer is arranged at the tail end of the scale 102, when a chain 3 needs to be tensioned, the push rod 1141 is screwed to push the adjusting block 111 to move forward and compress the pre-tightening spring 1143, at the moment, the adjusting seat 103 and a bearing seat 1031 fixed on the adjusting seat 103 also move along with the movement, the bearing seat 1031 also pushes a driven shaft 2 to move outward, a driven wheel 5 fixed on the driven shaft 2 moves to tension the chain 3 outward, when the V-shaped groove on the cushion block 1142 at the tail end of the pre-tightening spring 114.

In the invention, the tail end of the push rod head end B is provided with a C-shaped snap ring 1145 and a stop block 109 which are mutually matched for preventing the push rod head end B of the push rod 1141 from being separated from the adjusting block 111; the use of a C-shaped snap ring 1145 in combination with stop 109 prevents rod head end B from disengaging from adjustment block 111, thereby preventing the tension loss of pre-tensioned spring 1143.

In the invention, the chain tensioner 1 further comprises a guide block 104 for assisting the movement of the adjusting seat 103, and the guide block 104 is connected with a threaded hole on the bending plate 107 through a second screw 112; the guide block 104 may assist the adjusting seat 103 to move, so that the adjusting seat 103 may run smoothly.

In the invention, a sensor mounting plate 105 is fixed on a guide block 104, a sensor 106 is arranged on the sensor mounting plate 105, an induction block 108 which can be matched with the sensor 106 is arranged at the tail end of a driven shaft 2, and the sensor 106 is connected with a controller on a power and free conveyor; when the chain 3 is worn after being used for a long time, the length of the chain 3 is lengthened and loosened to reduce the tension force applied to the driven shaft 2, so the driven shaft 2 can move outwards, the sensing block 108 fixed at the tail end of the driven shaft 2 can approach the sensor 106, then the sensor 106 sends a detected signal to the controller of the accumulation conveyor, the controller carries out corresponding processing according to the received signal, and then audible and visual alarm, display and the like are carried out, so that the accumulation conveyor can send an audible and visual alarm signal and play a fault display picture and the like, the current abrasion of the chain 3 can be prompted to reach the standard of replacing the chain 3, and therefore the chain 3 can be replaced to guarantee the normal use of the accumulation conveyor.

The specific working condition of the chain tensioning mechanism for the accumulation conveyor is described as follows:

initial tensioning procedure of the chain tensioner 1: state 1 is when the chain 3 and driven pulley 2 of the accumulation conveyor are initially installed and are not tensioned, and state 2 is when the chain is tensioned. The state 1 is a slack state when the chain 3 is not tensioned, the axis position a1 of the driven shaft 2 is located behind the axis position a 1' of the driven shaft 2 in a tensioned state, the pre-tightening spring 1143 of the chain tensioning device 1 in the state 1 is in a free state, the pointer of the scale 102 points to the front of the V-shaped groove of the cushion block 1142, and the cushion block 1142 located at the tail end of the pre-tightening spring 1143 is located at a2 position; when the chain 3 is tensioned, the push rod 1141 is screwed, the push rod 1141 moves forwards and compresses the pre-tightening spring 1143, when the V-shaped groove on the end cushion block 1142 of the pre-tightening spring 1143 is aligned with the pointer on the scale 102, the chain 3 is in a tensioned state 2, the axis position of the driven shaft 2 of the chain transmission mechanism 1 is at a position a1 ', the position of the cushion block 1142 is at a position a 2', the tensioning degree of the chain 3 reaches a preset value, the push rod 1141 is stopped being screwed, and the chain 3 is tensioned.

Tensioning process of the chain tensioner 1 after wear of the chain 3: when the power and free conveyor continuously works, and the chain 3 is normally worn and the length of the chain is lengthened, the chain tensioning device 1 automatically stretches the chain 3 to tension the chain 3, so that the chain tensioning device 1 is in a state 3, at the moment, the axis position B1 of the driven shaft 2 is located behind the axis position B1' of the driven shaft 2 in the tensioning state, the pointer of the scale 102 points to the front of the V-shaped groove of the cushion block 1142, and the cushion block 1142 located at the tail end of the pre-tensioning spring 1143 is in a position B2; when the chain 3 is tensioned, the push rod 1141 is screwed, the push rod 1141 moves forwards and compresses the pre-tightening spring 1143, when the V-shaped groove on the end cushion block 1142 of the pre-tightening spring 1143 is aligned with the pointer on the scale 102, the chain 3 is in a tensioned state 4, the axis position of the driven shaft 2 of the chain transmission mechanism 1 is in a position B1 ', the cushion block 1142 is in a position B2', the tensioning degree of the chain 3 reaches a preset value at this time, the push rod 1141 is stopped being screwed, and tensioning of the chain 3 is completed.

The working process of the chain tensioner 1 when the chain 3 is at the tension limit position is as follows: with the continuous operation of the accumulation conveyor, the chain 3 is normally worn and the length is lengthened, and the sensing block 108 fixed at the tail end of the driven shaft 2 approaches to the sensor 106; the chain 3 is further abraded and lengthened along with the increase of the service time, the sensing block 108 fixed at the tail end of the driven shaft 2 is further close to the sensor 106, when the position C1 of the sensing block 108 is coincident with the tensioning limit position C1', the sensor 106 can sense the sensing block 108, and the accumulation type conveyor sends out an audible and visual alarm signal and a fault display picture to prompt a worker that the current chain 3 is seriously abraded to reach the standard of replacing the chain, so that the normal use of the accumulation type conveyor can be ensured only by replacing the chain.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A chain tensioning mechanism for a stacking conveyor comprises a chain tensioning device (1); the method is characterized in that: chain overspeed device tensioner (1) include one from driving wheel (5), hang on this follow driving wheel (5) and with follow chain (3) that driving wheel (5) meshing links up, locate bearing frame (1031) of fuselage (4) both sides of long-pending formula conveyer respectively, install bearing (115) on each bearing frame (1031), driven shaft (2) both ends of long-pending formula conveyer all pass bent plate (107) of crossing of fuselage (4) and fix respectively the tip at above-mentioned two bearings (115), and, follow driving wheel (5) and fix on driven shaft (2).

2. A chain tensioning mechanism for a stacking conveyor as defined in claim 1, wherein: chain overspeed device tensioner (1) still includes fixing base (101), push rod subassembly (114) and adjustment seat (103), bearing frame (1031) are fixed on adjustment seat (103), adjustment seat (103) through a first screw (110) with bend board (107) are connected be equipped with adjusting block (111) on adjustment seat (103), be equipped with fixed block (113) on fixing base (101), the both ends of push rod subassembly (114) respectively with adjusting block (111), fixed block (113) are connected.

3. A chain tensioning mechanism for a stacking conveyor as defined in claim 2, wherein: the push rod assembly (114) comprises a push rod (1141) and a pre-tightening spring (1143) sleeved on the push rod (1141), the push rod head end (B) and the push rod tail end (A) of the push rod (1141) are respectively connected with the adjusting block (111) and the fixing block (113), the pre-tightening spring (1143) is located between the adjusting block (111) and the fixing block (113), and two ends of the pre-tightening spring (1143) are respectively in contact with the adjusting block (111) and the fixing block (113).

4. A chain tensioning mechanism for a stacking conveyor as defined in claim 3, wherein: be equipped with scale (102) on adjusting block (111) pretension spring (1143) with the one end of fixed block (113) contact is connected with can with scale (102) complex cushion (1142), cushion (1142) cover is established on push rod (1141).

5. A chain tensioning mechanism for a stacking conveyor as defined in claim 2, wherein: and the tail end of the push rod head end (B) is provided with a C-shaped snap ring (1145) and a stop block (109) which are matched with each other and used for preventing the push rod head end (B) from being separated from the adjusting block (111).

6. A chain tensioning mechanism for a depositing conveyor as claimed in any one of claims 1 to 5, wherein: the chain tensioning device (1) further comprises a guide block (104) for assisting the adjusting seat (103) to move, and the guide block (104) is connected with a threaded hole in the bending plate (107) through a second screw (112).

7. A chain tensioning mechanism for a stacking conveyor as defined in claim 6, wherein: be fixed with sensor mounting panel (105) on guide block (104), sensor mounting panel (105) facial make-up is equipped with sensor (106) the end of driven shaft (2) be equipped with can with sensor (106) complex response piece (108), sensor (106) are connected with the controller on the long-pending formula conveyer of putting.