JPS5954820A - Auto free wheel hub - Google Patents

Abstract

PURPOSE:To obtain a structure, which is short in its axial length, by juxtaposing NO.1 spring, which energizes a cam-follower toward a cam, and NO.2 spring, which connects a clutch in a resilient manner to the cam-follower in the axial direction. CONSTITUTION:A cam-follower 16 is pressed against a cam surface 15b of a cam 15 by means of a coil spring 18, whose one end is locked to a spline 11a via a clip 23. When a wheel shaft 1 is driven to rotate, the cam-follower 16 is pushed and moved toward the clutch 14 side by means of the cam surface 15b of the cam 15 which is given braking torque at the early stage of the rotation of the shaft 1. On the other hand, the cam-follower 16 is connected in a resilient manner to a clutch 14 in the axial direction by means of a spring coil 19 that expands or contracts in the axial direction. The coil spring 19 is arranged in a concentric manner with a coil spring 18. One end of the spring coil 19 is fixed to the clutch 14 while the other end is fixed to the cam-follower 16.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an auto-freewheel hub, which is interposed between an axle and a wheel hub of a four-wheel drive vehicle that is rotatably driven only during four-wheel drive. This invention relates to a freewheel hub that connects hubs to automatically transmit power.

One type of auto freewheel hub is "ζ", which was previously proposed in Japanese Patent Application Laid-Open No. 139527/1982. Rotatably assembled at the outer end of the pipe A via a bearing (not shown) 4=J outer #MB1 of the wheel hub B
A main body C is fixed to the main body C, an inner sleeve E is spline-coupled to the outer end protrusion of the axle which is inserted into the axle pipe A in the main body C, and a hydraulically movable sprue is attached onto the inner sleeve E.・It is in-coupled and has external teeth F1 on the outer periphery that engage with the inner 7 ct and engage/disengage 1υ ability).
＞"'I"'U゛・:S1P and P1"Axes*Δ,, actuated at the outer ends of 0'(..., connected, hated,...).

When rotating the axle IJ □Inner sleeve rv"l'
= Force J-G that rotates relative to □", temple G and clutch ・F between °C inner sleeve E, movable in the axial direction, ib, 11 examples, axle 1) co, l
ll, clutch F (
1111 Camsole pushed in the direction of the length axis: A1 core II, the cams lower ■ 1 and crano tip ゛ are allowed to move in the direction of contact? 1 and then ``stick'' ゛ruji d in l-J and this shi=! Between the outer end of the inlet l, 1 and the outer 1° of the axle 1) 1, 1, 1, there is an interposition between the reel ←・month<!・A spring 1, which directs the cam lower 11 toward the cam G via J, is interposed between the cam claw 1) and the clutch 1. It is equipped with a spring M that biases the motor in the direction of the ζ axis toward the ζ axis.
is the 1st turn of the axle 1j AII J 11:j is the cam G
Since the cam surface 0.1 of the cam surface 0.1 pushes the cam ring lower 11 and pushes the clutch F via the sub and ring M, the outside: α・ , tooth! 7[When the internal tooth C1 meshes with the external 11F1, internal +i
,,C,lo:? )・Even if the α161 part facing the ear comes into contact, the spring M is bent to ensure smooth axial movement of the cam follower H, and the engagement is possible. Push F to open the outer teeth F1 and inner 6.
'9. ]'(7,1') This has the advantage of guaranteeing one-speed meshing 1. However, in this auto freewheel frame, since both springs L and M are arranged in series, the freewheel frame is long in the axial direction, and the outer end of the axle is 1lli!
It may be difficult to assemble the 8-height autosolipoilhuff in the space provided. .・：
'The present invention solves this problem by solving the above-mentioned problems.
(The auto parts that try to solve the problem without hindering it:) I-o...: A boiler hub is rotatably mounted on the outside of the axle pipe (= J-shaped wheel). A main body fixed to the outer end of the hub, an inner sleeve fixed to the outer θ111 protrusion of the axle pushed through the axle 1 within the main body so as to be capable of transmitting power, and this inner sleeve.
Move in the axial direction 1) Move the 1st and 2nd meshing teeth removably engaged with the 1st and 1st teeth that are removably assembled and provided on the main body. clutch and front
a cam which is operatively connected to the four shafts 11 of the striking axle tube and rotates the axle relative to the inner sleeve; - The ax cam is assembled to move in the axial direction on the shaft, and is pushed in the axial direction by the cam surface of the cam when the shaft is driven once. 1., camf No. 1, between J''1 and the clutch, on the outer periphery of the s11...-zo.

Group 1 = J is lowered, n: 1st cam, l: lower part is directed towards the cam.

The first spring is biased by the spring, and the nail is arranged in parallel with the spring. and cam claw 1.1a are connected in a bullet 1θ manner in the axial force direction.

Configurations 1 and 7 are characterized by the second spring that connects the device. 115,1" (, the present invention).

No. 71,” the above advantages-@141! fzu'4
), 4. Definitely the case.

The auto freewheel hash can be shortened in the axial direction and can be easily installed on the limited smoothness of the outer end of the center shaft. Further, in the present invention, since the clutch described in 1iiJ and the cam follower are connected only by the second spring, the structure of the connecting portion between the clutch and the cam follower becomes extremely knotted, and it is possible to improve the ease of assembly. , the auto freewheel hub can also be converged in the radial direction. .

An embodiment of the present invention will be described below based on the drawings.

In Fig. 1, there are four axles l, and when the wheel is driven, it is rotated.
It is inserted into the axle tube 21, and a spline is formed on the outer end of the protruding portion (a) (the outer end of the side of the vehicle). Also, the inner end of the axle l has a universal joint (
(not shown) through a differential gear (shown, fJ)
is connected to. Note that the □ differential gear device is connected to the transformer 1 (not shown) of the sachet. On the other hand, at the outer end of the axle tube 2, a wheel hub 5 is rotatably assembled to a lock nut 3 via a well-positioned bearing 4. Further, this wheel knob 5 is connected to the axle 1 via an auto-freewheel frame 01 according to the present invention.

: 4-Tosori 11 Feel hub O No. 1, 1, middle wheel 1 is rotated by % 14, and when two axles 1 and 1! I-wheel hub 5 fully automatic power transmission 11Jfi! As a concubine, 1. So, the Lika-like body IO is fixed to the outer end 5a of the middle wheel barb 5, y, y.
h, see you again.

The inner sleeve book is fixedly pre-plated onto the outer end projection qlHa of the axle l. Main body 10
is operated by a metal bearing 12 connected to the inner circumferential wall of its outer end.
It is freely rotatably shafted to the ζinno-leave 11, and the force, bar, 7.1, 3 is fixed to the outer end.

Further, internal teeth 10a, which serve as first meshing teeth, are integrally formed on the inner circumferential wall of the outer end portion of the main body 10.

- On the inner sleeve 11, there is a clamp 1.
4. Cam 15. A cam follower, 16, and a coil spring 18.1.9 are assembled (= J 41. - The external teeth +42 are formed on the outer periphery of the main body IO as second meshing teeth, and do not removably mesh with the internal teeth 10.2 of the main body IO. . The cam 15 is 1. The inner end of the inner sleeve,...l'll (rotation function on top!
t jlJl) Reli・tsu, cut out with clip 20 +
l: The inner edge is covered with Figure 2~/f(1
Figure 4 shows ° (as shown (J% of these 7 pairs, , 1, 5.
, 15a are formed. Winter melon 15. The axle tube 2 is fixed to the drum 2 (1) and extends into the annular brake 22 mounted on the drum 2 (1).
2, it can come into contact with the bent portions 22a, 22a. The brake 22 consists of a brake inmand 22△ and a shoe 2213 of 31.
．． i , ) (i does not rotate through the friction force! Half a pair (
1 [cam 1] is used to drive the rotation of the axle l.
') , p, , Mr. 7 15. , a came into contact with the bent portion 22a. When a braking torque (=I is applied to the cam 15,
Rotate it relative to 16 mag. Further, the outer end of the cam 15 is provided with a pair of slopes 15.
b, 2. ,．． 15, b, 2 and -, pair of flat surfaces j5
b, 3. 1. ．． A cam surface 151) consisting of 5 b 3 is formed, and a protrusion 15 of =
．． , and are formed, and the camso lower 16 is engaged. The cam follower 16 is attached to the spline 11) of the inner sleeve 11 so as to be movable in the axial direction and capable of transmitting power. ° The coil spring 18 that is engaged with the □1a causes the □cam 15 to click,
However, when the i5b is pressed and the rotation of the city axis ■ is driven, the initial 1 yo 1 lI! I want to receive a lot of iJ toru,
15 □ It is pushed axially towards the 14 side by the 1' tj9. Also, Camfo 1: JA I 6
is elastically connected to the ζ clutch 14 in the axial direction by a coil spring 19 that can be expanded and contracted in the axial direction.
There is. 21 Irus) °Ring 19 is coil spring 1
8, and is fixed to the clutch 14 at -(1'4'J) and fixed to the cam follower I6 at the other end.In addition, in FIG. The first step is to lie face down.

In this embodiment configured as described above, when the vehicle m'1 is not rotated, the clutch 14. Cam 15, cuckoo
The lower part A is in the position shown in Figs. 2 and 3, and the clutch 14 glue 1'4'a' is separated from the internal tooth 10a of the main body [0] as shown in Fig. 1. Wheel hub 5
□It can rotate freely about the axle 1. ″
□By the way, when the axle 1' is rotationally driven, at the initial stage, the pawl 15'a of the cam 16 comes into contact with the bent portion 2''2a of the brake 22, and the brake force 5 is applied to the braking torque □. The cam follower [6] rotates integrally with the cam 1'5' and the axle 1', and the cam follower 16 rotates against the cam surface 15'b of the car 15 by the slope 15'b2, which causes the coil spring to be applied. It is pushed toward the clutch 14 (outward) against the action of the cam followers 1' and 8, moves to the position shown in Fig. 4, and rides on the flat surface 15b3. The force is transmitted to the clutch 14' via the spring 19', and the clutch 111L is pushed outward so that its outer teeth 14a l
i + Internal teeth 101 of main body IO mesh 1゛□. Gono 11
1. Even if the mutually opposing ends of the temporary lock external tooth 1'4a and the internal tooth lOa abut against each other at the 4th position, the coil spring gaye 9 is bent to ensure the outward movement of the camfoil JA 16. In addition, when engagement is possible, the clutch 14 is elastically pushed to quickly bring the external teeth 14a and internal teeth tOa together.
In order to
- Physically rotates.

In addition, in this state, the cam follower 16 exerts a force A l as shown in Fig. 4G, °7.
The force that comes into contact with 5c and receives the braking torque "l;l'?
r: Rotates accordingly.

In order to disengage the external teeth 14a and internal teeth 10a that are meshing as described above as shown in Fig. 1, it is sufficient to move the vehicle in the opposite direction without rotating the axle 1. . -4'
However, if you rotate the axle 1 and move the heavy vehicle forward (or backward) in four-wheel drive, the vehicle will move forward (or backward) in four-wheel drive. During backward (or forward) movement, the inner sleeve 11 is rotated by the wheel hub 5, the cam 15 receives braking torque from the brake 22, and the cam 15 is applied to the clutch 14. 16 etc. are integrally rotated in the same manner, and under the action of the coil spring 18, the 3i2 flat surface 15 of the cam lower 16 or the cam surface 151]
When moving from b3 to trough 151) 1, clutch 1 is connected to b3 through coil spring 19.
4 moves inward! Is L, "ζ, the external tooth 1.42i separates from the internal tooth 10a.

In the above embodiment, the cam is rotatably assembled to the inner sleeve and the axle rotates 10 times! During driving, the cam receives braking torque from the brake assembled on the axle tube 2 side, causing the cam and cam pawl 1. +A (inner sleeve) rotates relative to each other, and as a result, the cam follower is pushed in the direction of the axial force toward the clutch by the cam surface of the cam, but the cam is non-rotatably assembled to the outer end of the axle η2. When the axle 1 is driven to rotate, the cam follower is pushed toward the clutch side by the cam surface of the cam.
It may also be pushed in the axial direction. In this case, the brake is not needed.

Further, in the above embodiment, the first mesh teeth are formed on the inner periphery of the main body 10 and the second mesh teeth are formed on the outer periphery of the clutch 14. It is also possible to carry out the present invention by forming the second meshes θ,i outwardly on the outside of the clutch 14, and by forming the second meshes θ,i outwardly on the outside of the clutch 14.

Furthermore, in the above embodiment, the cam 7I:Ia is
・A coil is used as a spring to force the force toward ・(21 Illusblink 1) (1), and as a spring to elastically connect Camso, 4■A and Kuranona in the axial direction. It is also possible to implement the present invention by using the spring 19 and using at least one of these springs as a bamboo shoot spring.

In addition, in the second embodiment, ζ was arranged in parallel by placing the coil spring 9 at the tip q' concentrically with the small coil spring I8. For example, 4 having the same function as the spring 18
1111I coil spring into inner sleeve 11
The coil springs are arranged at equal intervals in the circumferential direction on the outer periphery of the coil spring 19, and between the coil springs arranged at equal intervals, two coil springs having the same function as the coil spring 19 are arranged in parallel. However, the present invention can be carried out even in this case.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing one embodiment of the present invention, Fig. 2 is a longitudinal sectional side view of the brake portion shown in Fig. 1, and Fig. 3 is a non-sectional view of the cam, cam lower, coil spring, and brake shown in Fig. 1. FIG. 4 is a developed view showing the relationship when the device is in operation, FIG. 4 is a development view of the same when the device is in operation, and FIG. 5 is a longitudinal sectional front view showing a conventional example. Explanation of symbols 1... Axle, 2... Axle tube, 5... Heavy wheel hub, 1
0--Main body, 10a...-Internal tooth (1st 1@coating tooth),
11...Inner sleeve, J4...Clutch, 1
4a... External tooth (second meshing ridge), 15... Cam, 15
b...Cam surface, 16...Cam follower, 18...
Coil spring (first spring), 19...
Ile spring (second spring), 01...]-l
・Freewheel hub. Applicant Aisin Seiki Co., Ltd. Agent Patent Attorney Teru Hase - Figure 1 Figure 2 2 Figure 3 Figure 4

Claims (1)

[Claims] A main body is fixed to the outer end of a wheel hub rotatably assembled to the outer end of the axle tube, and an outer end protrusion of the axle inserted into the axle tube is fixed within the main body so as to transmit specific power. an inner sleeve which is movable in the axial direction and capable of transmitting power; a clutch having two meshing teeth, a cam which is operatively extended and deformed at all ends of the axle tube and which rotates relative to the inner sleeve when the front axle is driven to rotate; The inner sleeve is assembled between the clutches in the axial direction, and the axle is rotated by the cam surface of the cam in the axial direction G on the clutch side.
a cam follower that is pushed, a first spring that is assembled on the outer periphery of the sleeve between the cam follower and the clutch and urges the cam follower toward the cam, and a first spring that is parallel to the first spring. An auto freewheel hub comprising a second spring arranged and fixed to the clutch at one end and fixed to the cam follower at the other end to elastically connect the clutch and the cam follower in the axial direction.