CN202241099U

CN202241099U - Three-jaw puller for dismounting part on shaft through small deep hole

Info

Publication number: CN202241099U
Application number: CN2011202211329U
Authority: CN
Inventors: 高龙士
Original assignee: Zhejiang Industry Polytechnic College
Current assignee: Zhejiang Industry Polytechnic College
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2012-05-30
Anticipated expiration: 2021-06-28

Abstract

A three-jaw puller for dismounting a part on a shaft through a small deep hole comprises a rack, wherein a circular ring sleeve with threads on the inner wall is arranged at the middle part of the rack, three pieces of equant circular arc supports are welded on the outer wall of the circular ring sleeve, a screw rod is in internal threaded connection with the circular ring sleeve, an inner claw and an outer claw are connected on the support through a connecting piece, and a long and thin rod is arranged at the upper end of the screw rod. The three-jaw puller has the beneficial effects that the part on the shaft, which is in interference fit and in different kinds of shapes, can be conveniently dismounted through the small deep hole, and the designed dismounting requirement on the part on the shaft is reduced.

Description

A kind of Three-claw pull-horse device that is used to dismantle the small deep hole parts on shaft

Technical field

The utility model relates to a kind of Three-claw pull-horse device that is used to dismantle the small deep hole parts on shaft.

Background technology

When the parts on shaft of dismounting interference fit; Basically all be to dismantle with the Three-claw pull-horse device; Now used Three-claw pull-horse device is seen Fig. 1, shown in Figure 2, comprise frame 1 ', inside and outside pawl 2 ', the screw rod 4 of the band vertex of a cone '; Inside and outside pawl 2 ' through brace 3 ' with frame 1 ' be connected, the screw rod 4 of the said band vertex of a cone ' be installed in frame 1 ' centre; Its application scenario will meet screw rod 4 ' vertex of a cone can withstand spindle nose 5 ' end face, utilizes the principle of relative motion to come to see shown in Figure 3 to parts on shaft 6 ' dismantle.But in some dismounting occasions, the Three-claw pull-horse device screw rod vertex of a cone can not stretch make the Three-claw pull-horse device in the hole of parts on shaft screw rod vertex of a cone top less than the spindle nose end face, cause and can not dismantle normally.Perhaps when Machine Design,, bring many inconvenience to the designer in order to consider that parts on shaft crossing the facility of dismantling when win cooperates, all can change the profile in parts on shaft aperture and the size of size in advance.

Summary of the invention

Be the problem that the screw rod vertex of a cone that solves present Three-claw pull-horse device can not be stretched the small deep hole of parts on shaft, the utility model provides a kind of Three-claw pull-horse device that is used to dismantle the small deep hole parts on shaft that can put in the small deep hole of parts on shaft.

The technical scheme of the utility model:

A kind of Three-claw pull-horse device that is used to dismantle the small deep hole parts on shaft; Comprise frame; The middle part of said frame is that an inwall is the annulus cover of screw thread, is welded with three supports that are the circular arc five equilibrium on the outer wall of said annulus cover, and said annulus cover internal thread is connected with screw rod; Be connected with inside and outside pawl through brace on the said support, it is characterized in that: the upper end of said screw rod is provided with elongate rod.

Further, all be connected with the split pin matching and fixing between said brace and support and the inside and outside pawl through pivot pin.

The use of the utility model:

1, catches on the extension place of parts on shaft with three inside and outside pawls;

2, rotary screw makes elongate rod withstand the spindle nose of parts on shaft;

3, perhaps put in boosting-rod among the Fang Xinkong screw rod in the rotary frame with spanner;

4, utilize the principle of action and reaction, axle is progressively pulled out in parts on shaft.

The beneficial effect of the utility model: can be conveniently to the dismounting of the parts on shaft of the small deep hole that is interference fit of various bodies, and alleviated dismounting requirement to the design parts on shaft.

Description of drawings

Fig. 1 is the transverse sectional view of existing Three-claw pull-horse device.

Fig. 2 be along A-A among Fig. 1 to cutaway view.

Fig. 3 is the user mode figure of existing Three-claw pull-horse device.

Fig. 4 is the transverse sectional view of the utility model.

Fig. 5 be along B-B among Fig. 4 to cutaway view.

Fig. 6 is the user mode figure of the utility model.

The specific embodiment

With reference to Fig. 4, Fig. 5; A kind of Three-claw pull-horse device that is used to dismantle the small deep hole parts on shaft comprises frame 1, and the middle part of said frame 1 is that an inwall is the annulus cover of screw thread; Be welded with three supports that are the circular arc five equilibrium on the outer wall of said annulus cover; Said annulus cover internal thread is connected with screw rod 4, is connected with inside and outside pawl 2 through brace 3 on the said support, and the upper end of said screw rod 4 is provided with elongate rod 5.

All be connected with split pin 7 matching and fixing between said brace 3 and support and the inside and outside pawl 2 through pivot pin 6.

The use of the utility model, see Fig. 6:

1, catches on the extension place of parts on shaft 8 with three inside and outside pawls 2;

2, rotary screw 4, make elongate rod 5 withstand the spindle nose of parts on shaft 8;

3, perhaps put in boosting-rod among the Fang Xinkong screw rod 4 in the rotary frame 1 with spanner;

4, utilize the principle of action and reaction, axle 9 is progressively pulled out in parts on shaft 8.

The described content of this specification embodiment only is enumerating the way of realization of utility model design; Should not being regarded as of the protection domain of the utility model only limits to the concrete form that embodiment states, the protection domain of the utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.

Claims

1. Three-claw pull-horse device that is used to dismantle the small deep hole parts on shaft; Comprise frame; The middle part of said frame is that an inwall is the annulus cover of screw thread, is welded with three supports that are the circular arc five equilibrium on the outer wall of said annulus cover, and said annulus cover internal thread is connected with screw rod; Be connected with inside and outside pawl through brace on the said support, it is characterized in that: the upper end of said screw rod is provided with elongate rod.

2. a kind of Three-claw pull-horse device that is used to dismantle the small deep hole parts on shaft according to claim 1 is characterized in that: all be connected with the split pin matching and fixing through pivot pin between said brace and support and the inside and outside pawl.