CN209159419U - A kind of hub reduction gear - Google Patents

Abstract

The utility model relates to a kind of hub reduction gears, it aims to solve the problem that and is easy to happen vibration in current hub reduction gear, the technical problem for causing hub reduction gear stability bad, including shell, it is set to the intracorporal sun gear of shell, the upper and lower ends of sun gear are respectively equipped with a planetary gear, further include the line shaft through sun gear, shell includes left housing and right shell, the middle part of left housing is equipped with circular hole, is equipped with cap in circular hole；The inner wall of circular hole, which extends internally, cricoid boss, in cap insertion circular hole and is pressed on boss and is fixedly connected by bolt with left housing, and cavity is constituted between cap and annular boss, thrust plate is equipped in cavity, thrust plate is connect by several springs with cap；Line shaft and thrust plate hard contact can be effectively avoided by spring, vibration is reduced to reduce the impact force generated when line shaft and thrust plate contact, and then the stability the utility model for enhancing hub reduction gear has structure simple, compact, the high advantage of stability.

Description

A kind of hub reduction gear

Technical field

The utility model relates to automobile parts technology neighborhood more particularly to a kind of hub reduction gears.

Background technique

Hub reduction gear is afterbody deceleration torsion increasing device in automotive transmission, it be widely used in load truck, In motorbus, offroad vehicle and some other large-scale work mine car, mainly by shell, be set to the intracorporal gear set of shell with And the components such as line shaft are constituted, but are found in the actual use of hub reduction gear, the line shaft in hub reduction gear is because of peace The factors such as preset clearance, installation error are filled, can be shifted in the axial direction, generally pass through the stop bit on cap inner wall at this time Block limits it, but when stop block and line shaft end contact belongs to hard contact, can generate punching in the two contact It hits power and shakes, to influence the stability of hub reduction gear, and then shorten the service life of hub reduction gear.

Summary of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art, adapt to reality and need, provide a kind of hub reduction Device, to solve to be easy to happen vibration in current hub reduction gear, the technical problem for causing hub reduction gear stability bad.

In order to realize the purpose of this utility model, the technology employed by the present utility model is

Design a kind of hub reduction gear；Including shell, it is set to the intracorporal sun gear of shell, the upper and lower ends of the sun gear It is respectively equipped with a planetary gear being engaged with, further includes the line shaft through sun gear, the shell includes left housing and right shell, a left side The middle part of shell is equipped with circular hole, is equipped with cap in the circular hole, the cap is oppositely arranged with sun gear, line shaft；(the above are existing There is technology).

In the design, the inner wall of the circular hole, which extends internally, cricoid boss, in the cap insertion circular hole and is pressed in On boss, the outwardly extending circular step in cap edge is fixedly connected by bolt with left housing, the cap and annular boss it Between constitute cavity, be equipped in the cavity and the isodiametric thrust plate of cavity, the side wall of the thrust plate and the inner sidewall of boss Contact, and the two opposite can be slided, thrust plate is connect by several springs with cap, and thrust plate and sun gear, line shaft are coaxial Setting.

Further, the upper surface of the boss is equipped with annular groove, is equipped with flexible sealing cushion rubber in the annular groove.

Further, the both ends of the spring are separately fixed on the inner wall of cap and the side wall of thrust plate.

Further, the step is equipped with a screw hole, and screw hole internal screw thread is connected with adjusting bolt, and the adjusting bolt passes through Step is worn, the setting of bolt thrust plate interval is adjusted, or the end of adjusting bolt is against on the side wall of thrust plate.

The utility model has the beneficial effects that:

1. in the design use thrust plate and spring design, when line shaft axial movement when, the end of line shaft with only Push plate contact, as the axial movement spring of line shaft is compressed, can effectively avoid line shaft and thrust plate hard contact, To reduce the impact force generated when line shaft and thrust plate contact and reduce vibration, and then enhance the stabilization of hub reduction gear Property improve hub reduction gear service life.

2. keeping the shift length of thrust plate adjustable, while reducing the labor of spring using the design for adjusting bolt in the design Damage, and then the service life of spring is improved, cap and left housing are detachably connected by bolt, are for the ease of maintenance and more commutation The components of pass.

3. the utility model also has the advantages that other, will be proposed together with corresponding structure in embodiment.

Detailed description of the invention

Fig. 1 is the utility model primary structure schematic diagram；

Fig. 2 is enlarged structure schematic diagram at A in the utility model Fig. 1；

In figure: 1. left housings；10. sun gear；11. planetary gear；12. cavity；2. right shell；3. cap；32. step；4. boss； 41. annular groove；42. flexible sealing cushion rubber；5. bolt；6. adjusting bolt；7. spring；8. thrust plate；9. line shaft.

Specific embodiment

The present invention will be further described with reference to the accompanying drawings and examples:

Embodiment 1: a kind of hub reduction gear, referring to Fig. 1, Fig. 2；Including shell, it is set to the intracorporal sun gear 10 of shell, institute The upper and lower ends for stating sun gear 10 are respectively equipped with a planetary gear 11 being engaged with, and further include the line shaft 9 through sun gear 10, The shell includes left housing 1 and right shell 2, and the middle part of left housing 1 is equipped with circular hole, is equipped with cap 3 in the circular hole, the cap 3 with Sun gear 10, line shaft 9 are oppositely arranged；(the above are the prior arts).

In the design, the inner wall of the circular hole, which extends internally, cricoid boss 4, and the cap 3 is embedded in circular hole and presses On boss 4, the outwardly extending circular step 32 in 3 edge of cap is fixedly connected by bolt 5 with left housing 1；Cap 3 and planetary gear Frame 4, which is detachably connected, maintains easily and replaces relevant components.

Further, line shaft 9 and 8 hard contact of thrust plate, cap 3 described in the design and annular boss in order to prevent Cavity 12 is constituted between 4, be equipped in the cavity 12 with the isodiametric thrust plate 8 of cavity 12, the side wall of the thrust plate 8 with it is convex The inner sidewall of platform 4 contacts, and the two opposite can be slided, and thrust plate 8 is connect by several springs 7 with cap 3, the both ends of spring 7 It is separately fixed on the inner wall of cap 3 and the side wall of thrust plate 8, thrust plate 8 and sun gear 10, line shaft 9 are coaxially disposed；When dynamic Power axis 9 moves axially and pushes thrust plate 8 toward when moving to left, and spring 7 is compressed, and line shaft 9 and thrust plate 8 can be effectively avoided Hard contact to reduce the impact force generated when line shaft 9 is contacted with thrust plate 8 and reduce vibration, and then enhances wheel side The stability of retarder.

Further, in order to enhance the sealing performance of cap 3, the upper surface of boss 4 described in the design is equipped with annular groove 41, the annular groove 41 is interior to be equipped with flexible sealing cushion rubber 42.

Further, the step 32 is equipped with a screw hole, and screw hole internal screw thread, which is connected with, adjusts bolt 6, the adjusting spiral shell Bolt 6 runs through step 32, adjusts bolt 6 and the interval of thrust plate 8 is arranged, or adjusts the end of bolt 6 and be against the side wall of thrust plate 8 On；The shift length of thrust plate 8 can be adjusted by adjusting bolt 6, while adjusting bolt 6 can effectively reduce spring 7 Strain.

10, two line shaft 9, sun gear planetary gears 11 are sequentially arranged at shell first when installing and using by the design It is interior, thrust plate 8 is fixed on to the inside of cap 3 followed by spring 7, cap 3 and thrust plate 8 are then embedded in circular hole together It is interior, at this point, the step 32 at 3 edge of cap is pressed on boss 4, meanwhile, thrust plate 8 is located in cavity 12, and the side wall of thrust plate 8 It is contacted with the inner wall of boss 4, it is by bolt 5 that it is fixed with left housing 1 later, it will finally adjust bolt 6 and be threaded in step In screw hole on 32.

By above-mentioned design, when line shaft 9 moves axially, the end of line shaft 9 and the side wall of thrust plate 8 are connect Touching, with the axial movement of line shaft 9, spring 7 is compressed, and can effectively avoid line shaft 9 and 8 hard contact of thrust plate, To reduce the impact force generated when line shaft 9 and thrust plate 8 contact and reduce vibration, and then enhance the steady of hub reduction gear It is qualitative, the service life of hub reduction gear is improved, bolt 6 is adjusted and thrust plate 8 is limited, meanwhile, reduce the labor of spring 7 Damage.

What the embodiments of the present invention were announced is preferred embodiment, and however, it is not limited to this, the common skill of this field Art personnel understand the spirit of the utility model easily according to above-described embodiment, and make different amplification and variation, but as long as The spirit of the utility model is not departed from, it is all within the protection scope of the present utility model.

Claims (4)

1. a kind of hub reduction gear, including shell, it is set to the intracorporal sun gear of shell (10), up and down the two of the sun gear (10) End is respectively equipped with a planetary gear (11) being engaged with, and further includes the line shaft (9) through sun gear (10), and the shell includes Left housing (1) and right shell (2), the middle part of left housing (1) are equipped with circular hole, are equipped with cap (3) in the circular hole, the cap (3) with too Sun wheel (10), line shaft (9) are oppositely arranged；It is characterized by: the inner wall of the circular hole, which extends internally, cricoid boss (4), It in cap (3) the insertion circular hole and is pressed on boss (4), the outwardly extending circular step in cap (3) edge (32) passes through spiral shell Bolt (5) is fixedly connected with left housing (1), constitutes cavity (12) between the cap (3) and annular boss (4), the cavity (12) Interior be equipped with contacts with cavity (12) isodiametric thrust plate (8), the side wall of the thrust plate (8) with the inner sidewall of boss (4), and The two can opposite sliding, thrust plate (8) connect by several springs (7) with cap (3), and thrust plate (8) and sun gear (10) are moved Power axis (9) coaxial arrangement.

2. a kind of hub reduction gear as described in claim 1, it is characterised in that: the upper surface of the boss (4) is equipped with annular Slot (41), the annular groove (41) is interior to be equipped with flexible sealing cushion rubber (42).

3. a kind of hub reduction gear as described in claim 1, it is characterised in that: the both ends of the spring (7) are separately fixed at On the inner wall of cap (3) and the side wall of thrust plate (8).

4. a kind of hub reduction gear as described in claim 1, it is characterised in that: the step (32) is equipped with a screw hole, spiral shell Hole internal screw thread, which is connected with, adjusts bolt (6), and the adjusting bolt (6) runs through step (32), adjusts bolt (6) and thrust plate (8) Interval setting, or the end of adjusting bolt (6) are against on the side wall of thrust plate (8).