CN201295735Y

CN201295735Y - Chain pre-tension device

Info

Publication number: CN201295735Y
Application number: CNU2008201866302U
Authority: CN
Inventors: 王兴保
Original assignee: ASIA DEKOR INDUSTRIES (SHENGZHUN) Co Ltd
Current assignee: ASIA DEKOR INDUSTRIES (SHENGZHUN) Co Ltd
Priority date: 2008-10-24
Filing date: 2008-10-24
Publication date: 2009-08-26
Anticipated expiration: 2018-10-24

Abstract

The utility model discloses a chain pre-tension device which comprises a draw rod, a displacement draw hook seat, a fixed draw hook seat, draw hooks and a circlip, wherein an optical shaft is arranged at one end of the draw rod, and a lead screw is arranged at the other end; the fixed draw hook seat is supported on the optical shaft by bearings respectively arranged on both end surfaces of the fixed draw hook seat, and both ends of the fixed draw hook seat are axially fixed on the optical shaft by the circlip and the shaft shoulder of the lead screw; the displacement draw hook seat is axially screwed on the lead screw part of the draw rod; either draw hook is an L shape, the long edge of the L shape is a mounting edge, and the short edge is a hook body edge; and the hook surfaces of the two draw hooks are oppositely and respectively fixed on the displacement draw hook seat and the fixed draw hook seat. The utility model is simple in structure, convenient to use, saves time and labor and improves the working efficiency for mounting a chain.

Description

The chain pre-tightening apparatus

Technical field

The utility model relates to a kind of pre-tightening apparatus of flexible drive parts, relates in particular to a kind of tension chain that passes through, and makes two terminations of open type chain that the chain link bearing pin can be installed, thereby makes it to being connected into the pre-tightening apparatus of closed kinematic chain bar, belongs to the mechanical transmissioning technology field.

Background technology

When new bushroller chain is installed, often find two sprocket wheel position adjustments to the termination that hour still can't dock roller chain, its reason is, still there is a segment distance at the corresponding pin-and-hole of inner link, the outer link center that lays respectively at the roller chain two ends, locking element can't be installed make the roller chain closure, if increase by a chain link, then chain is too loose is unfavorable for transmission; If the inside and outside chain link by artificial tension chain two ends makes corresponding pin-and-hole center coaxial, not only time-consuming but also effort influences operating efficiency.

The utility model content

In order to overcome above-mentioned defective, the utility model provides a kind of chain pre-tightening apparatus, and this device is used for the installation of new chain, and is quick, efficient, laborsaving.

The utility model is achieved by the following technical programs:

A kind of chain pre-tightening apparatus comprises pull bar, displacement drag hook seat, fixedly drag hook seat, drag hook and jump ring, and described pull bar one end is an optical axis, and the other end is a screw mandrel; Described fixedly drag hook seat is bearing on the described optical axis by the bearing that is separately positioned in its both ends of the surface, and this fixedly is axially fixed on the optical axis by jump ring, the screw mandrel shaft shoulder respectively at the two ends of drag hook seat; Displacement drag hook seat screws vertically on the screw mandrel of pull bar part, and the hook face of two drag hooks relatively is separately fixed at displacement drag hook seat and fixedly on the drag hook seat.

The purpose of this utility model can also further realize by following technical measures.

Aforesaid chain pre-tightening apparatus, the termination of the optical axis part of wherein said pull bar is provided with wrench square head.Described drag hook is L shaped, and described L shaped long limit is for installing the limit, and minor face is the coupler body limit; Described L shaped long leg is arranged with several unthreaded holes, and the thickness of described L shaped short side part is less than the inner distance of chain roller, and described drag hook is separately fixed at displacement drag hook seat by several screws and fixedly on the drag hook seat.

The utility model is simple in structure, easy to use, time saving and energy saving, improved operating efficiency.The utility model can be selected different drag hooks for use according to the model of the chain of different size, pass through rotating rod, make displacement drag hook seat under the screw thread gearing of the screw mandrel part of pull bar, produce axial displacement, drive is inserted in drag hook in the chain link of the chain two ends tension chain that relatively moves, thereby make the corresponding pin-and-hole of inner link, the outer link center that lays respectively at the roller chain two ends coaxial, the closed bushroller chain of locking element can be installed easily.

Advantage of the present utility model and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiment only provide as an example with reference to accompanying drawing.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is a Tiebar structure schematic diagram of the present utility model.

The specific embodiment

Below in conjunction with drawings and Examples the present utility model is described further.

As shown in Figure 1 and Figure 2, the utility model is mainly by pull bar 1, displacement drag hook seat 2, fixedly drag hook seat 3, drag hook 4, bearing 6 and jump ring 7 are formed, and pull bar 1 one ends are optical axis 12, and the other end is a screw mandrel 13.Fixedly drag hook seat 3 is bearing on the optical axis 12 by the

bearing

6,7 that is separately positioned in its both ends of the surface, and its two ends are axially fixed on the optical axis 12 by jump ring 7, the screw mandrel shaft shoulder 13 respectively.Displacement drag hook seat 2 screws vertically on the screw mandrel 13 of pull bar 1.The termination of the optical axis 12 of pull bar 1 is provided with wrench square head 11, when needs rotating tension bar 1, only needs to pull square toes 11 with spanner, and pull bar 1 just rotates around its axis.

Drag hook 4 is L shaped, and L shaped long limit 41 is for installing the limit, and minor face 42 is the coupler body limit; The L shaped long limit 41 of present embodiment drag hook 4 is provided with 2 unthreaded holes, L shaped minor face 42 is the coupler body part of drag hook 4, its thickness is less than the inner distance of chain roller, the coupler body of being convenient to drag hook 4 inserts in the chain link, and drag hook 4 respectively relatively is separately fixed at displacement drag hook seat 2 by 2 screws, 5 hook faces and fixedly on the drag hook seat 3.

When the utility model used, the coupler body with drag hook 4 inserted respectively in the chain link at the chain two ends that need installation earlier, left several pitch chain joints before the chain link of each end that coupler body inserts, so that the chain link bearing pin is installed.Pull square toes 11 rotating tension bars 1 with spanner then, the screw mandrel 13 of pull bar 1 rotates, the displacement drag hook seat 2 that screws on screw mandrel 13 moves to fixing drag hook seat 3 directions, this moment, fixedly drag hook seat 3 was motionless, the spacing of two drag hooks 4 is dwindled, thereby realize the pretension to chain, the utility model can be installed the chain link bearing pin easily, finishes the installation of bushroller chain.

In addition to the implementation, the utility model can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims

1. chain pre-tightening apparatus comprises pull bar (1), displacement drag hook seat (2), fixedly drag hook seat (3), drag hook (4) and jump ring (7), and it is characterized in that: described pull bar (1) one end is optical axis (12), and the other end is screw mandrel (14); Described fixedly drag hook seat (3) is bearing on the described optical axis (12) by bearing (6), (7) that are separately positioned in its both ends of the surface, and this fixedly is axially fixed on the optical axis (12) by jump ring (7), the screw mandrel shaft shoulder (13) respectively at the two ends of drag hook seat (3); Displacement drag hook seat (2) screws vertically on screw mandrel (14) part of pull bar (1), and the hook face of two drag hooks (4) relatively is separately fixed at displacement drag hook seat (2) and fixedly on the drag hook seat (3).

2. chain pre-tightening apparatus according to claim 1, it is characterized in that: the termination of optical axis (13) part of described pull bar (1) is provided with wrench square head (11).

3. chain pre-tightening apparatus according to claim 1, it is characterized in that: described drag hook (4) is for L shaped, and described L shaped long limit (41) is for installing the limit, and minor face (42) is the coupler body limit; Described L shaped long limit (41) part is provided with several unthreaded holes (43), and the thickness of described L shaped minor face (42) part is less than the inner distance of chain roller, and described drag hook (4) is separately fixed at displacement drag hook seat (2) by several screws (5) and fixedly on the drag hook seat (3).