CN202165557U

CN202165557U - One-way gear

Info

Publication number: CN202165557U
Application number: CN2011202427959U
Authority: CN
Inventors: 魏小恒
Original assignee: GUANGZHOU SHULANG COMMODITY CO Ltd
Current assignee: GUANGZHOU SHULANG COMMODITY CO Ltd
Priority date: 2011-06-29
Filing date: 2011-06-29
Publication date: 2012-03-14
Anticipated expiration: 2021-06-29

Abstract

The utility model relates to the field of gears and discloses a one-way gear, which comprises a gear body, a rolling pin and a spring. An inner tooth-shaped cavity is arranged in the gear body, the bottom of the inner tooth-shaped cavity extends downward in arc-shaped mode, the rolling pin and the spring are contained in the tooth-shaped cavity, and the spring is installed at the bottom of the inner tooth-shaped cavity and abuts against the rolling pin at the opening position of the inner tooth-shaped cavity. The one-way gear is durable in locking property and long in service life.

Description

A kind of ratchet

Technical field

The utility model relates to field of gears, relates in particular to the more lasting ratchet of a kind of lockup capacity.

Background technique

Ratchet is a kind of gear of realizing the bearing one-way rotation.Existing ratchet mainly relies on card locking needle roller in order to realize the one-way rotation of bearing, thereby reaches the purpose of locking bearing.Yet, existing ratchet when in use, when the small grains of sand, dust amass on card; The dirt knot is stiff easily for card, lose the ability of locking bearing at last fully, and existing ratchet fouling is complicated; The cleaning cost is high; Use the ratchet that will more more renew after a period of time, in the time of ratchet minimizing in working life, wasting a large amount of resources.

The model utility content

It is more lasting that the goal of the invention of the utility model provides a kind of lockup capacity, the ratchet of longer service life.

In order to realize the foregoing invention purpose, the technological scheme of the utility model is:

A kind of gear comprises gear body, needle roller, spring; Said gear body inside has the internal tooth form chamber; Extend to arc lower the bottom in said internal tooth form chamber; It is inner that said needle roller, spring are contained in the internal tooth form chamber; Said spring is installed on the bottom in internal tooth form chamber, and withstands the needle roller that is arranged at internal tooth form accent portion.

Optional, described internal tooth form chamber number is four.

Existing ratchet, the dependence card reaches the effect of locking bearing, complex structure and damage easily; The utility model has designed brand-new internal tooth form chamber, and extend to arc lower the bottom in internal tooth form chamber, and what make the internal tooth form chamber has certain gradient from the bottom to the oral area; Cooperate needle roller and spring can reach locking bearing purpose; And simple in structure just because of the utility model, not fragile, make the utility model under same locking effect; Lockup capacity is more lasting, longer service life.

Therefore, application the utility model embodiment's technological scheme, locking better effects if, longer service life.

Description of drawings

Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, does not constitute the improper qualification to the utility model, in the accompanying drawings:

A kind of longitudinal section that Fig. 1 provides for the utility model embodiment 1.

Among the figure:

1, gear body 2, needle roller

3, spring 4, internal tooth form chamber

5, bearing

Embodiment

To combine accompanying drawing and specific embodiment to specify the utility model below, be used for explaining the utility model in the illustrative examples and the explanation of this utility model, but not as the qualification to the utility model.

Embodiment 1:

Like Fig. 1, present embodiment discloses a kind of ratchet, and it comprises gear body 1, needle roller 2, spring 3; Have the internal tooth form chamber 4 of four bottoms to the arc lower extension in gear body 1 inside; Needle roller 2, spring 3 are contained in the internal tooth form chamber 4, and spring 3 is installed on the bottom in internal tooth form chamber 4, and withstand the needle roller 2 of the oral area that is arranged at internal tooth form chamber 4.

When bearing 5 clockwise rotated for driving shaft, the friction of bearing 5 drove needle roller 2 and rolls to the bottom in internal tooth form chamber 4, and this moment, needle roller 2 served as the effect that helps bearing 5 to rotate; And when bearing be that driving shaft is when rotating counterclockwise; Under the promotion of the friction of bearing 5 and spring 3; Needle roller 2 rolls to the oral area in internal tooth form chamber 4, because the bottom in internal tooth form chamber 4 is the structure of extending to arc lower, so the bottom in internal tooth form chamber has had certain gradient; This moment needle roller 2 by the bottom in internal tooth form chamber 4 slowly to oral area rise near, up to being close to locking bearing 5.

From the above mentioned, the lockup capacity of present embodiment mainly relies on the shape in internal tooth form chamber to decide, and is simple in structure; The internal tooth form chamber is opened in gear body inner; Effect can be very lastingly, not fragile, make that the lockup capacity of present embodiment is lasting, and long service life.

More than technological scheme that the utility model embodiment is provided carried out detailed introduction; Used concrete example among this paper the utility model embodiment's principle and mode of execution are set forth, above embodiment's explanation only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and application area, all can change, in sum, this description should not be construed as the restriction to the utility model.

Claims

1. gear is characterized in that:

Comprise gear body, needle roller, spring;

Said gear body inside has the internal tooth form chamber;

Extend to arc lower the bottom in said internal tooth form chamber;

It is inner that said needle roller, spring are contained in the internal tooth form chamber;

Said spring is installed on the bottom in internal tooth form chamber, and withstands the needle roller that is arranged at internal tooth form accent portion.

2. a kind of gear according to claim 1 is characterized in that:

Described internal tooth form chamber number is four.