CN206111973U

CN206111973U - Sprocket overspeed device tensioner among chain drive

Info

Publication number: CN206111973U
Application number: CN201621146447.0U
Authority: CN
Inventors: 许丽丽; 高传琴
Original assignee: NANJING LIMIN MACHINERY CO Ltd
Current assignee: NANJING LIMIN MACHINERY CO Ltd
Priority date: 2016-10-21
Filing date: 2016-10-21
Publication date: 2017-04-19
Anticipated expiration: 2026-10-21

Abstract

The utility model discloses a sprocket overspeed device tensioner technical field's a sprocket overspeed device tensioner among chain drive, the on -line screen storage device comprises a base, the top left and right sides of base is equipped with first rack and L jacket pipe respectively, through withstanding the chain with the sprocket, and mesh with the chain, reduce the movement resistance of chain, be equipped with wear -resisting ceramic coating layer on the contact surface of second rack and two sets of locating pieces, remove left when the second rack and can take place the friction with two locating pieces, wearability through wear -resisting ceramic coating layer, the wearing and tearing of avoiding the contact surface make the second rack vertically take place to shift, let second rack and gear engagement's is inseparabler, the lead screw, the second rack is equipped with dustproof felt with L type sheathed tube junction, prevent that the dust from getting into L type sheathed tube inner chamber, obstruct the motion of component, just the automatic chain that keeps is not lax for a long time behind one -time Setup for the device, the the relapse regulation time is shortened, high durability and convenient use, time saving and labor saving.

Description

A kind of sprocket tension device in chain drive

Technical field

This utility model is related to sprocket tension device technical field, the sprocket wheel tensioning in specially a kind of chain drive Device.

Background technology

In productive life, chain drive is a kind of common power transmission mode, the such as power transmission mode of bicycle Be exactly one kind therein, as chain length is unadjustable, can cause after working long hours Chain conveyer by nut fix from Moving axis is close to driving shaft so that chain slack list sag is increased, and reduces chain and effectively engages with sprocket wheel, declines transmission capacity, Can cause such as the de- chain of bicycle.Traditional bicycle chainwheel strainer is will manually to adjust driven shaft position so as to away from master Reaching the purpose of tensioning, this tensioning operation is inconvenient, wastes time and energy, and returns worker and brings certain work for moving axis Intensity, needs, by constantly adjustment, can also affect work efficiency, for this purpose, I proposes a kind of chain drive machine in use Sprocket tension device in structure.

Utility model content

The purpose of this utility model is to provide the sprocket tension device in a kind of chain drive, to solve the above-mentioned back of the body The existing tensioning method inconvenient operation proposed in scape technology, the problem for wasting time and energy.

For achieving the above object, this utility model provides following technical scheme：Sprocket wheel in a kind of chain drive Tight device, including base, are respectively arranged on the left side and the right side the first tooth bar and L-type sleeve pipe at the top of the base, the L-type sleeve pipe Inner cavity top is provided with genesis analysis two groups of bearings, and the top and bottom on the right side of the inner chamber of the L-type sleeve pipe is equipped with positioning Block, the inner chamber of bearing described in two groups are plugged with leading screw, and the bottom of the leading screw is provided with gear, the right side engagement connection of the gear Have the second tooth bar, second tooth bar through between locating piece and extending to the right side of L-type sleeve pipe described in two groups, described second L-type connecting rod is provided with the right side of tooth bar, the top of the leading screw is covered at the top of the outer wall of the leading screw through the top of L-type sleeve pipe Nut is connected to, U-shaped support base on the left of the nut, is provided with, the inner chamber of the U-shaped support base is provided with elastic component, the elastic component Left side be provided with push rod, the top right side of the nut is provided with push rod, chain rest device is provided with the top of the push rod.

Preferably, the chain rest device includes base plate, and the two ends of the upper surface of the base plate are arranged with gripper shoe, two groups The surface crown of the gripper shoe is distributed with through hole in a ring, is set described in two groups between the through hole of the surface crown of gripper shoe The outer wall for having rotating shaft, the rotating shaft is socketed with sprocket wheel, and the through hole is at least five groups of structure identical.

Preferably, the second tooth bar and contact surface of locating piece is provided with wearable ceramic coat layer described in two groups.

Preferably, the junction of the leading screw, the second tooth bar and L-type sleeve pipe is provided with dust-proof felt.

Compared with prior art, the beneficial effects of the utility model are：By allowing driven shaft one end of L-type connecting rod and machine Contact, when driven shaft is gradually close to driving shaft, L-type connecting rod is moved to the left gradually, while making the second tooth bar meshed gears Drive leading screw rotation, leading screw and nut constitute ball screw assembly, nut can be made to increase by leading screw rotation, and then be passed through Chain rest device opposing chain is moved by push rod, the sagging chain of jack-up, is made by profile of tooth of the push rod in elastic component and the first tooth bar With under, can prevent nut from declining because of de-rotation, allow chain rest device to depart from chain, chain is sagging again, while passing through L-type Connecting rod gives driven shaft one opposition, slows down its rate travel, and then the driven sprocket for making to be socketed on driven shaft is to actively The reduced rate of sprocket wheel movement, has similar tension effects to driven sprocket, by withstanding chain with sprocket wheel, and engages with chain, The contact surface for reducing the resistance of motion of chain, the second tooth bar and two groups of locating pieces is provided with wearable ceramic coat layer, when the second tooth Bar is moved to the left can occur friction with two locating pieces, by the wearability of wearable ceramic coat layer, it is to avoid the abrasion of contact surface The second tooth bar is longitudinally shifted over, allow the engagement of the second rack and pinion more closely, leading screw, the second tooth bar and L-type sleeve pipe Junction is provided with dust-proof felt, prevents dust into the inner chamber of L-type sleeve pipe, the motion of hindering component, and the device is through once mounting Just chain can be kept automatically for a long time not relax afterwards, reduce the time for adjusting repeatedly, it is easy to use, it is time saving and energy saving.

Description of the drawings

Fig. 1 is this utility model structural representation；

Fig. 2 is this utility model chain rest device structural representation.

In figure：1 base, 2 first tooth bars, 3L molded cannulas, 4 bearings, 5 gears, 6 locating pieces, 7 second tooth bars, 8 leading screws, 9 tops Bar, 10 chain rest devices, 100 base plates, 101 gripper shoes, 102 through holes, 103 rotating shafts, 104 sprocket wheels, 11U type support bases, 12 elastic components, 13 push rods, 14L type connecting rods, 15 nuts.

Specific embodiment

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only this utility model a part of embodiment, rather than whole Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment for being obtained, belongs to the scope of this utility model protection.

Fig. 1-2 is referred to, this utility model provides a kind of technical scheme：A kind of sprocket wheel tensioning dress in chain drive Put, including base 1, the top of the base 1 is respectively arranged on the left side and the right side the first tooth bar 2 and L-type sleeve pipe 3, the L-type sleeve pipe 3 Inner cavity top be provided with genesis analysis two groups of bearings 4, the top and bottom on the right side of the inner chamber of the L-type sleeve pipe 3 is equipped with Locating piece 6, the inner chamber of bearing 4 described in two groups are plugged with leading screw 8, and the bottom of the leading screw 8 is provided with gear 5, the right side of the gear 5 Side engagement is connected with the second tooth bar 7, and second tooth bar 7 is through between locating piece 6 and extending to L-type sleeve pipe 3 described in two groups Right side, the right side of second tooth bar 7 is provided with L-type connecting rod 14, the top of the top of the leading screw 8 through L-type sleeve pipe 3, Nut 15 is socketed with the top of the outer wall of the leading screw 8, the left side of the nut 15 is provided with U-shaped support base 11, the U-shaped support base 11 inner chamber is provided with elastic component 12, and the left side of the elastic component 12 is provided with push rod 13, and the top right side of the nut 15 is provided with top Bar 9, the top of the push rod 9 are provided with chain rest device 10.

Wherein, the chain rest device 10 includes base plate 100, and the two ends of the upper surface of the base plate 100 are arranged with support Plate 101, the surface crown of gripper shoe 101 described in two groups are distributed with through hole 102 in a ring, gripper shoe 101 described in two groups Be provided with rotating shaft 103 between the through hole 102 of surface crown, the outer wall of the rotating shaft 103 is socketed with sprocket wheel 104, the through hole 102 to Be five groups of structure identical less, chain is withstood with sprocket wheel 104, and engaged with chain, the resistance of motion of reduction chain, described second Tooth bar 7 and the contact surface of locating piece 6 described in two groups are provided with wearable ceramic coat layer, and it is fixed with two that the second tooth bar 7 is moved to the left Position block 6 can occur friction, by the wearability of wearable ceramic coat layer, it is to avoid the abrasion of contact surface and 7 longitudinal direction of the second tooth bar are sent out Raw displacement, allow the second tooth bar 7 and the engagement of gear 5 more closely, the leading screw 8, the second tooth bar 7 are set with the junction of L-type sleeve pipe 3 There is dust-proof felt, prevent dust from entering the inner chamber of L-type sleeve pipe 3, the motion of hindering component.

Operation principle：Base 1 is arranged on the support of machine, the driven shaft end thereof contacts of L-type connecting rod 14 and machine are allowed, And bottom of the sprocket wheel 104 just to machine chain, when driven shaft is gradually close to driving shaft, L-type connecting rod 14 is gradually to moving to left It is dynamic, the second tooth bar 7 is moved to the left between two groups of locating pieces 6, while making 7 meshed gears 5 of the second tooth bar around by two groups Bearing 4 is arranged on the leading screw 8 of 3 inner chamber of L-type sleeve pipe and rotates, and leading screw 8 and nut 15 can constitute ball screw assembly, by leading screw 8 Rotation rises can nut 15, and then moves 10 opposing chain of chain rest device by push rod 9, the sagging chain of jack-up, spiral shell Female 15 when rising, the compression elastic piece 12 under the profile of tooth ramp effect of the first tooth bar 2 of push rod 13, when driven shaft is not moved, Nut 15 does not rise, and now push rod 13 is moved to the left under the elastic force effect of elastic component 12, and the profile of tooth of the first tooth bar 2 is blocked, Nut 15 is prevented because de-rotation declines, and then makes chain sagging again, while reverse to driven shaft one by L-type connecting rod 14 Active force, slows down its rate travel, and then the reduced rate that the driven sprocket for making to be socketed on driven shaft is moved to drive sprocket, right Driven sprocket has similar tension effects, withstands chain with sprocket wheel 104, and engages with chain, the resistance of motion of reduction chain, and second The contact surface of tooth bar 7 and two groups of locating pieces 6 is provided with wearable ceramic coat layer, positions with two when the second tooth bar 7 is moved to the left Block 6 can occur friction, by the wearability of wearable ceramic coat layer, it is to avoid the abrasion of contact surface occurs 7 longitudinal direction of the second tooth bar Displacement, allow the second tooth bar 7 and the engagement of gear 5 more closely, leading screw 8, the second tooth bar 7 are provided with dust-proof with the junction of L-type sleeve pipe 3 Felt, prevents dust from entering the inner chamber of L-type sleeve pipe 3, and the motion of hindering component, the device just can long-times after once mounting Automatically keep chain not relax, reduce the time for adjusting repeatedly, it is easy to use, it is time saving and energy saving.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, Be appreciated that these embodiments can be carried out various changes in the case of without departing from principle of the present utility model and spirit, repair Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.

Claims

1. the sprocket tension device in a kind of chain drive, including base (1), it is characterised in that：The top of the base (1) Portion is respectively arranged on the left side and the right side the first tooth bar (2) and L-type sleeve pipe (3), and the inner cavity top of the L-type sleeve pipe (3) is provided with longitudinal direction Two groups of bearings (4) of distribution, the top and bottom on the right side of the inner chamber of the L-type sleeve pipe (3) is equipped with locating piece (6), two groups of institutes The inner chamber for stating bearing (4) is plugged with leading screw (8), and the bottom of the leading screw (8) is provided with gear (5), nibbles on the right side of the gear (5) Conjunction is connected with the second tooth bar (7), and second tooth bar (7) is through between locating piece (6) and extending to L-type sleeve pipe described in two groups (3) right side, is provided with L-type connecting rod (14) on the right side of second tooth bar (7), the top of the leading screw (8) is through L-type sleeve pipe (3) top, is socketed with nut (15), is provided with U-shaped support base on the left of the nut (15) at the top of the outer wall of the leading screw (8) (11), the inner chamber of the U-shaped support base (11) is provided with elastic component (12), is provided with push rod (13) on the left of the elastic component (12), The top right side of the nut (15) is provided with push rod (9), is provided with chain rest device (10) at the top of the push rod (9).

2. the sprocket tension device in a kind of chain drive according to claim 1, it is characterised in that：The chain support Device (10) includes base plate (100), and the two ends of the upper surface of the base plate (100) are arranged with gripper shoe (101), described in two groups The surface crown of gripper shoe (101) is distributed with through hole (102) in a ring, the surface crown of gripper shoe (101) described in two groups Through hole (102) between be provided with rotating shaft (103), the outer wall of the rotating shaft (103) is socketed with sprocket wheel (104), the through hole (102) At least five groups of structure identical.

3. the sprocket tension device in a kind of chain drive according to claim 1, it is characterised in that：Described second Tooth bar (7) is provided with wearable ceramic coat layer with the contact surface of locating piece (6) described in two groups.

4. the sprocket tension device in a kind of chain drive according to claim 1, it is characterised in that：The leading screw (8), the second tooth bar (7) is provided with dust-proof felt with the junction of L-type sleeve pipe (3).