CN2799982Y

CN2799982Y - External involute tooth chamfered two-way connecting gear

Info

Publication number: CN2799982Y
Application number: CN 200520009450
Authority: CN
Inventors: 吴先友
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-08
Filing date: 2005-06-08
Publication date: 2006-07-26
Anticipated expiration: 2015-06-08

Abstract

The utility model discloses an external involute tooth chamfered two-way combining gear, which comprises a main body of the gear, wherein the inner wall of the main body of the gear is provided with an inner key and the middle part of the outer wall of the main body of the gear is provided with a supporting part of a shifting fork. The outer wall of two sides of the middle part is provided with an involute tooth, and an engaging end surface of the involute tooth is provided with a chamfer. The involute tooth of the utility model can be inclined to a certain engaged angle according to needs of a gear pair to help the gear pair to effectively overcome the gear-reversing phenomenon. The engaged end surface of the involute tooth is provided with the chamfer, and each inner tooth end surface corresponding to the gear pair also provided with a chamfer. Therefore, the engaged frequency of the combining gear and the gear pair is higher, the engaged cross section is larger, the performance is more reliable and the service life is longer. Additionally, the process of the gear pair is simpler and the gear pair can be shaped once time through the coined inner tooth. Therefore, the strength is improved and the cost is reduced. The utility model has the advantages of simple structure, little space occupation, easy manufacturing, large engaged cross section, secure strength, long service life, etc.

Description

The two-way combination gear of tooth chamfering gradually outward

Technical field

The utility model relates to a kind of transmission device, particularly a kind of outer gradually two-way combination gear of tooth chamfering.

Background technique

Two-way combination gear is widely used in the gearshift mechanism of automobile, motorcycle.At present general is castellated two-way combination gear, and its structure is: be provided with 2 to 6 tooth inserted tooths on gear body two ends, imbed in the gear pair corresponding groove by the tooth inserted tooth and mesh.But its meshing frequency is low, and inserted tooth intensity is little; And owing to there are enough spaces to mesh, in transferring power, be easy to generate bump, break inserted tooth, can destroy entire mechanism when serious; Frequent bump also makes the wearing and tearing of inserted tooth pair accelerate, and shorten working life.There is a kind of interior jacket-type involute two-way in addition in conjunction with tooth, by interior external tooth and gear pair engagement, but it must be provided with the outer end tooth of an overcoat tooth and a correspondence, working space must be big, so raw material, technology expend and is doubled and redoubled, also very high to the requirement of gear pair simultaneously, gear pair is subjected to the restriction of manufacturing technology, not only cost is higher, and intensity can not get ensureing.On the synchronous tooth of automobile, also be provided with a kind of unidirectional in conjunction with tooth, has tool withdrawal groove in conjunction with the tooth tail end, this unidirectional design in conjunction with tooth that is attached on the gear mass also makes its gear pair become the same complicated in conjunction with tooth with interior jacket-type, make the design space volume of whole gear pair be multiplied, cost is very high.

Summary of the invention

Defective and deficiency at prior art, the purpose of this utility model is to provide a kind of two-way combination gear of outer gradually tooth chamfering that improves meshing frequency by outer gradually tooth end of engagement surface chamfer, make its gear pair concavity design simultaneously, dwindle the spatial volume of whole gear pair greatly, reduced raw material at double.

The technical solution of the utility model is as follows: a kind of outer gradually two-way combination gear of tooth chamfering, comprise the gear body, has internal key on the inwall of gear body, the position is accepted for shift fork in the middle part of gear body outer wall, in cut open the both sides outer wall be provided with involute tooth, its key is: the engagement end face of described involute tooth is provided with chamfering.

The chamfering of described involute tooth engagement end face is the isosceles surface chamfer, and it can be an isosceles arc surface chamfering, also can be isosceles plane chamfering.

It can be annular groove that the shift fork at described gear body middle part is accepted the position, also can be arranged on another gear at gear body middle part.

Involute tooth of the present utility model certain tooth matching angle that can tilt according to the needs of gear pair helps gear pair effectively to overcome and moves back a grade phenomenon; The end of engagement surface chamfer of involute tooth, each internal tooth end face of corresponding teeth wheel set also is provided with chamfering, makes that the meshing frequency of combination gear and gear pair is higher, the engagement cross section is bigger, and because gradually the tooth back lash is little, strong shock resistance, thereby make performance more reliable, longer service life; Gear pair is by the once-through of pressure-sizing internal tooth simultaneously, and tooth root relies on the gear body fully in it, has saved raw material greatly, makes whole gear pair under the prerequisite that guarantees working strength, and technology is simpler, and cost of production is lower.

The utlity model has simple in structure, spatial volume is little, easy processing, engagement cross section are big, intensity ensures advantages such as coefficient height, long service life, only half raw material, technology expend and just can replace existing inside and outside cover in conjunction with toothing.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model, also is first embodiment of the present utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the A portion enlarged view radially of Fig. 1.

Fig. 4 is an another kind of structural representation of the present utility model, also is second embodiment of the present utility model.

Fig. 5 is the B portion enlarged view radially of Fig. 4.

Embodiment

Please see Figure 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the utility model comprises gear body 1, has internal key 6 on the inwall of gear body 1, and the position is accepted for shift fork in the middle part of gear body 1 outer wall, the outer wall of both sides, middle part is provided with involute tooth 2, and the engagement end face of described involute tooth 2 is provided with chamfering 3.Chamfering 3 is determined angular range according to actual needs, and it can be an isosceles arc surface chamfering, also can be isosceles plane chamfering.

Embodiment 1, and as Fig. 1, Fig. 2, shown in Figure 3, the chamfering 3 of described involute tooth 2 engagement end faces is an isosceles plane chamfering, and it is annular groove 4 that the shift fork at gear body 1 middle part is accepted the position.

Embodiment 2, and as Fig. 4, shown in Figure 5, the chamfering 3 of described involute tooth 2 engagement end faces is an isosceles arc surface chamfering, and it is another gear 5 that is arranged on gear body 1 middle part that the shift fork at gear body 1 middle part is accepted the position.

Claims

1, a kind of outer gradually two-way combination gear of tooth chamfering, comprise gear body (1), has internal key (6) on the inwall of gear body (1), the position is accepted for shift fork in the middle part of gear body (1) outer wall, the outer wall of both sides, middle part is provided with involute tooth (2), and it is characterized in that: the engagement end face of described involute tooth (2) is provided with chamfering (3).

2, the outer gradually two-way combination gear of tooth chamfering according to claim 1 is characterized in that: the chamfering (3) of described involute tooth (2) engagement end face is the isosceles surface chamfer.

3, the outer gradually two-way combination gear of tooth chamfering according to claim 2 is characterized in that: the chamfering (3) of described involute tooth (2) engagement end face is an isosceles arc surface chamfering.

4, the outer gradually two-way combination gear of tooth chamfering according to claim 2 is characterized in that: the chamfering (3) of described involute tooth (2) engagement end face is an isosceles plane chamfering.

5, the outer gradually two-way combination gear of tooth chamfering according to claim 1, it is characterized in that: it is annular groove (4) that the shift fork at described gear body (1) middle part is accepted the position.

6, the outer gradually two-way combination gear of tooth chamfering according to claim 1 is characterized in that: the shift fork at described gear body (1) middle part is accepted the position for being arranged on another gear (5) in the middle part of the gear body (1).