CN103154504A

CN103154504A - Cam motor and cam motor deceleration device

Info

Publication number: CN103154504A
Application number: CN2011800416755A
Authority: CN
Inventors: 笹生真; 山本雄司; 广濑信行; 荒木真吾
Original assignee: OKUBO GEAR CO Ltd
Current assignee: OKUBO GEAR CO Ltd
Priority date: 2010-08-31
Filing date: 2011-07-11
Publication date: 2013-06-12
Also published as: TW201229406A; WO2012029229A1; JP2012052584A; KR20130109127A

Abstract

Provided is a cam motor which is easy to manufacture and maintain. The cam motor is provided with a main shaft (2) which is arranged so as to be able to rotate around the shaft centre, a cam disc (3) which is arranged on the main shaft (2) so as to be concentric with said main shaft (2) and on the outer periphery of which a cam surface (3a) is formed, a cylinder block (4) which is ring shaped and which is arranged such that the cam disc (3) is positioned inside of the ring, and a plurality of freely reciprocating pistons (42) which are arranged on the inner peripheral side of the cylinder block (4) and the tip sections of which are in contact with the cam surface (3a). The shape of the cam surface (3a) is set such that the cam disc (3) rotates with the reciprocal motion of the pistons (42).

Description

Cam motor and cam motor speed reducer

Technical field

The present invention relates to a kind of cam motor and cam motor speed reducer, it is used in the deceleration of the swivel gear of concrete mixer, hydraulic excavator or the various machineries such as running gear and general universal machine.

Background technique

As everyone knows, for the revolution of the various machineries that slow down, will be combined into cam motor speed reducer (for example referring to patent documentation 1) as cam motor and the gear reducer of hydraulic motor.The cam motor of this cam motor speed reducer is formed with the inner peripheral surface of the cam ring of ring-type, as camming surface, configures cylinder body in the ring of this cam ring, and this cylinder body is coaxial and can rotate freely with cam ring.

In addition, be formed with a plurality of cylinders at the outer circumferential side of cylinder body, in this cylinder, piston can be set reciprocally freely.If this cylinder is supplied with, discharged hydraulic oil, the piston limit contacts with the camming surface of cam ring, and the limit moves back and forth, and makes the cylinder body rotation by the reaction force from camming surface.Therefore, gear reducer is attached on the output shaft of such cam motor, consists of the cam motor speed reducer.

The prior art document

Patent documentation

Patent documentation 1: Unexamined Patent 10-115359 communique

Summary of the invention

The technical problem to be solved in the present invention

But in above-mentioned cam motor, owing to must form high-precision cam on the inner peripheral surface of cam ring, so it forms processing and need to expend a large amount of labours and time.In addition, because the inboard at cam ring arranges cylinder body, must in each cylinder of this cylinder body, piston be set, therefore assembling, installation complexity, numerous and diverse, the maintenances such as the replacement of spring, maintenance also expend a large amount of labours and time.

Therefore the purpose of this invention is to provide cam motor and the cam motor speed reducer of a kind of easy preparation or maintenance.

The technological means of technical solution problem

To achieve these goals, invention claimed in claim 1 is cam motor, it is characterized by, and described cam motor possesses: main shaft, and it is configured to rotate freely centered by the axle center; Cam disk, it is configured on described main shaft and is concentric with described main shaft, and its periphery is formed with camming surface; Cylinder body, it is ring-type, and is configured to make described cam disk to be positioned at ring; And, a plurality of pistons, it is configured in interior all sides of described cylinder body, and it carries out free to-and-fro motion under front end and state that described camming surface contacts; The shape of described camming surface is set for makes described cam disk be rotated along with the to-and-fro motion of described piston.

According to the present invention, each piston is supplied with, when discharging hydraulic oil, the piston limit contacts, pushes with the camming surface of cam ring, the limit moves back and forth, along with this to-and-fro motion, cam disk and main shaft rotate.

Invention claimed in claim 2 is the cam motor speed reducer, and it possesses cam motor claimed in claim 1, it is characterized in that, linking on described main shaft has gear reducer.

The invention effect

Invention according to claim 1, because the periphery at cam disk is formed with camming surface, therefore can highi degree of accuracy and easily cam is formed processing.In addition, due in the outside of cam disk (outer circumferential side) plunger, easily assemble, install, maintenance, maintenance also become easy.Further, due to plunger on the cylinder body that is positioned at the cam disk outside, thereby large configuration space be can guarantee, the shape of piston, the degrees of freedom of allocation position improved.

Invention according to claim 2 because gear reducer is attached on the cam motor main shaft of above-mentioned easy preparation and maintenance etc., thereby consist of the cam motor speed reducer, so the preparation of this device and maintenance etc. also becomes easy.That is to say, the installation of the cam motor speed reducer of labyrinth etc. becomes easy.

Description of drawings

Fig. 1 possesses the sectional view of cam motor speed reducer of the cam motor of embodiment of the present invention for expression.

Fig. 2 is plane (with the axially vertical face) sectional view of the cam motor of Fig. 1.

Fig. 3 is plan view (a) and the side view (b) of central joint of the cam motor of Fig. 1.

Fig. 4 (a) is the S1-S1 sectional view of Fig. 3 (a), is (b) the S2-S2 sectional view of Fig. 3 (a), is (c) the S3-S3 sectional view of Fig. 3 (a).

Fig. 5 (a) is the S4-S4 sectional view of Fig. 3 (b), is (b) the S5-S5 sectional view of Fig. 3 (b).

Fig. 6 is plan view (a) and the side view (b) of the cam motor of Fig. 1.

Fig. 7 is the enlarged view of the cam motor of Fig. 1.

Fig. 8 be presentation graphs 1 cam motor to row coil the periphery section plan.

Fig. 9 is the valve system figure of the cam motor of Fig. 1.

Figure 10 is the sectional view of observing from the angle different from Fig. 7.

Figure 11 is the plan view of gear reducer of the cam motor speed reducer of presentation graphs 1.

Figure 12 is that the cam motor of presentation graphs 1 coils the section plan of periphery to row under the first angle of swing.

Figure 13 is illustrated in the section plan that coils periphery under the second angle of swing of following Figure 12 to row.

Embodiment

Below, with reference to illustrated mode of execution explanation the present invention.

Fig. 1 possesses the sectional view of cam motor speed reducer 10 of the cam motor 1 of embodiment of the present invention for expression.Mark 2 main shaft for being configured to rotate freely centered by the axle center in figure, by spline, on main shaft 2 with these main shaft 2 concentric arrangement cam disks 3.

This cam disk 3 is about square position shape, and as shown in Figure 2, its outer circumferential face forms camming surface 3a, and shape, the cam locus of setting this camming surface 3a is the roughly star with circular arc, as described later, by each piston 42 to-and-fro motion, makes cam disk 3 rotations.

Be positioned under the state of inboard (annulus) configuration cylinder body 4 at this cam disk 3.This cylinder body 4 is about circular, with main shaft 2 concentric arrangement, is fixed on shell 9.

On cylinder body 4, on the position of extending with the radiation wire from the center, equal angles, equally spaced be formed with a plurality of (being in the present embodiment 10) cylinder 41.This cylinder 41 is cylindrical, on each cylinder 41, disposes free reciprocating piston 42 on the central direction of cylinder body 4.This piston 42 is about cylindrical, at the end configuration cam follower (front end) 43 of cam disk 3 sides, at the spring guide 45 of the other end configuration spring 44 and this spring 44 of guiding.In addition, spring 44 is clamped between piston 42 and piston cap 46, so, makes piston 42 always contact under the state of (extruding) with camming surface 3a at cam follower 43, moves back and forth.

Make each cylinder 41 to such cylinder body 4, by coil 5 to row, central joint 6 and back-up ring 7, supply with or discharge hydraulic oil.

As shown in Figure 3, central joint 6 is about cylindrical shape, and main shaft 2 is installed in spindle hole 6a by key 25, rotates freely with main shaft 2 is concentric.This central joint 6 is formed with respectively from the end face of cam disk 3 sides the second horizontal route 6c that a plurality of (being respectively in the present embodiment 8) are positioned at the first horizontal route 6b of outer circumferential side and are positioned at all sides vertically.In addition, towards the center, equal angles, equally spaced be formed with a plurality of (being in the present embodiment 8) first vertical-path 6d from the circumferential surface of non-cam disk 3 sides, as shown in Fig. 4 (a) and Fig. 5 (a), link, be communicated with the first horizontal route 6b.

Similarly, from the circumferential surface at middle part to the center, equal angles, equally spaced form several (being in the present embodiment 8) the second vertical-path 6e, as shown in Fig. 4 (b) and Fig. 5 (b), link with the second horizontal route 6c.Further, from the circumferential surface of cam disk 3 sides towards the center, equal angles, equally spaced be formed with a plurality of (being in the present embodiment 16) the 3rd vertical-path 6f, as Fig. 4 (c) and Fig. 5 (a) (b) as shown in, link with the first horizontal route 6b or the second horizontal route 6c.Like this, each first vertical-path 6d links, is communicated with the 3rd vertical-path 6f by the first horizontal route 6b; Each second vertical-path 6e links, is communicated with the 3rd vertical-path 6f by the second horizontal route 6c.

Further, on circular path that the first vertical-path 6d forms (being formed with on the track of central joint 6 of vertical-path 6d), form to oil groove 6g along this circular path, give oil groove 6g by this, all first vertical-path 6d all link, are communicated with oil supply port 7b described later.Similarly, on the circular path that the second vertical-path 6e forms, form oil-discharge trough 6h along this circular path, by this oil-discharge trough 6h, all second vertical-path 6e all link, are communicated with oil drain out 7c described later.Here, the opening end of all

horizontal route

6b, 6c all is equipped with sealing bolt.

As shown in Figure 6, back-up ring 7 is polygonal bulk, as shown in Figure 7, is formed with the mounting hole 7a that inserts central joint 6 at central part, is fixed on shell 9 by coil 5 to row.From the free end face of this back-up ring 7 along main shaft 2 axially, form oil supply port 7b and oil drain out 7c, make its rail of connecting fluid press pump and oil exit pipe of hydraulic fluid tank respectively.In addition, be formed with on back-up ring 7 to oilhole 7d and oil drainage hole 7e, the described oilhole 7d of giving links, is communicated with mounting hole 7a and oil supply port 7b; Described oil drainage hole 7e links, is communicated with mounting hole 7a and oil drain out 7c.Should be disposed on the circular path that the first vertical-path 6d of central joint 6 forms to oilhole 7d; Oil drainage hole 7e is disposed on the circular path of the second vertical-path 6e formation.

Coil 5 for discoid to row, be formed with the mounting hole 5a that inserts central joint 6 at central part, be fixed on shell 9 by cylinder body 4.As shown in Figure 8, coil on 5 to row at this, form a plurality of (in the present embodiment as 10) to row path 5b towards the outer circumferential face that coils 5 to row take the radiation wire from the inner peripheral surface of mounting hole 5a.As shown in Figure 7, on the circular path that the 3rd vertical-path 6f that be configured in central joint 6 should for row path 5b forms, and the configuration row of giving path 5b respectively, make the cylinder 41 of itself and cylinder body 4 opposite.Therefore, by be formed to row coil on 5 and be communicated with to row path 5b first to row mouthful 5c and be formed on cylinder body 4 and be communicated with cylinder 41 second to a row mouthful 4a, respectively the row of giving path 5b with cylinder 41 links, be communicated with.

Therefore, as described later, under the state of main shaft 2 and central joint 6 rotations, as shown in Figure 7, the hydraulic oil of being supplied with by oil supply port 7b, by give oilhole 7d flow to central joint 6 in oil groove 6g, near the first vertical-path 6d hydraulic oil flows into.At this moment, more hydraulic oil flows near the first vertical-path 6d to oilhole 7d.Then, the hydraulic oil that flow into the first vertical-path 6d first horizontal route 6b that flows through arrives the 3rd vertical-path 6f, with coil to row 5 to the opposed rotational position of row path 5b on, hydraulic oil is flowed into in row path 5b by the 3rd vertical-path 6f.Therefore, this hydraulic oil is supplied to cylinder 41 by the first row of giving mouthful 5c and the second row of giving mouthful 4a.

On the other hand, the hydraulic oil by cylinder 41 is discharged flow to the path 5b to row by the second row of giving mouthful 4a and first row of giving a mouthful 5c, and along with the rotation of central joint 6 flows in opposed the 3rd vertical-path 6f.Then, the second horizontal route 6c that flows through arrives oil-discharge trough 6h by the second vertical-path 6e, is discharged by oil drain out 7c by oil drainage hole 7e.

In addition, as shown in Fig. 7,9, coiling the safety check (interior pressure relief valve) 51 that on 5, configuration is communicated with oil supply port 7b and oil drain out 7c to row.Further, make the hydraulic oil that leaks from piston 42, central joint 6, be expelled to the outside from leakage hole 53.In addition, in figure, mark 52 is for the floss hole of discharging cam motor 1 internal hydraulic pressure oil.

On the other hand, valve box 71 is installed on back-up ring 7, as shown in Figure 9, is provided with low pressure selector valve 72 and low pressure relief valve 73(flushing valve in this valve box 71).Therefore, by low pressure selector valve 72 and low pressure relief valve 73, send the part hydraulic oil in cam motor 1 back to pressure-oil tank, can prevent that the pressure rise of hydraulic oil or temperature from rising, and prevents that it is deteriorated.

Link the gear reducer 8 shown in Fig. 1,11 on the main shaft 2 of such cam motor 1, consist of cam motor speed reducer 10.That is, actuation gear 21 is set on main shaft 2, is configured on output shaft 23 with three planetary pinions 22 of these actuation gear 21 interlocks.In addition, be formed with the fixed gear 24 with the ring-type of each planetary pinion 22 interlocks on the inwall of housing 9, during main shaft 2 rotation, each planetary pinion 22 limits and actuation gear 21 and fixed gear 24 interlocks, the limit rotation of slowing down, output shaft 23 is rotated with the rotational speed of regulation.

The effect of cam motor 1 and the cam motor speed reducer 10 of this structure then, is described with reference to Figure 12, Figure 13.Here, the first vertical-path 6d of central joint 6 as oil supply port SP, is described the second vertical-path 6e as oil drain out DP.

At first, angle of swing at main shaft 2 is under the state of θ 1, first, second oil supply port SP1, SP2 in Figure 12 with coil to row 5 give row path 5b just in time relative, first, second cylinder 41-1, the 41-2 corresponding with these rows of giving path 5b are supplied with more hydraulic oil.On the other hand, first, second oil drain out DP1, the DP2 in Figure 12 and to row coil 5 give row path 5b fully opposed, discharge more hydraulic oil from the 3rd, the 4th cylinder 41-3, the 41-4 corresponding with these rows of giving path 5b.Therefore, the piston 42 of first, second cylinder 41-1,41-2 advances to central side, their cam follower 43 extruding camming surface 3a, and simultaneously, the piston 42 of the 3rd, the 4th cylinder 41-3,41-4 is pushed and retreats by camming surface 3a.

Equally, angle of swing at main shaft 2 is under the state of θ 2, first, second oil supply port SP1, SP2 in Figure 13 with coil to row 5 give row path 5b just in time relative, first, second cylinder 41-1, the 41-2 corresponding with these rows of giving path 5b are supplied with more hydraulic oil.On the other hand, first, second oil drain out DP1, the DP2 in Figure 13 and to row coil 5 give row path 5b fully opposed, discharge more hydraulic oil from the 3rd, the 4th cylinder 41-3, the 41-4 corresponding with these rows of giving path 5b.Therefore, the piston 42 of first, second cylinder 41-1,41-2 advances, their cam follower 43 extruding camming surface 3a, and simultaneously, the piston 42 of the 3rd, the 4th cylinder 41-3,41-4 is pushed and retreats by camming surface 3a.Thus, cam disk 3 is along turning clockwise in figure.

Here, illustrate that with reference to Fig. 7 the angle of swing of main shaft 2 rotates to the mechanism of θ 2 from θ 1.By the first vertical-path 6d oil supply of central joint 6, hydraulic oil flow to first to a row mouthful 5c from coil 5 the row path 5b that gives to row, and second the give row mouthful 4a of hydraulic oil on being formed at cylinder body 4 is supplied to cylinder 41.

Thus, piston 42 advances to central side, main shaft 2 sides, and described cam disk 3 makes main shaft 2 to the equidirectional rotation by spline when turning clockwise in figure, and further, by key 25, central joint 6 is to the direction rotation identical with cam disk 3.So, by fixing to row coil 5 to the supply hole (the 3rd vertical-path 6f) of row path 5b and the central joint 6 of rotation mistake successively from, the angle of swing of main shaft 2 is rotated to θ 2 from θ 1.

So, cam disk 3 rotates along with the to-and-fro motion of each piston 42, and main shaft 2 is rotated by this rotation.Therefore, by gear reducer 8, the rotation of the main shaft 2 that slows down as previously mentioned exports output shaft 23 to the rotational speed of stipulating.

As previously mentioned, according to this cam motor 1 and cam motor speed reducer 10, owing to forming camming surface 3a on the outer circumferential face of cam disk 3, therefore can highi degree of accuracy and easily camming surface 3a is formed processing.In addition, due to plunger 42 on the cylinder body 4 of the outer circumferential side of cam disk 3, easily assembling, install, also improved maintenance, the maintainability of the replacement etc. of spring 44.For example, when replacing spring 44, loosen the bolt of the cylinder 41 of replacing object, unload piston cap 46, only replace spring 44 and get final product, do not need to unload cam disk 3.

Further because on the cylinder body 4 that is positioned at cam disk 3 outsides plunger 42, therefore can guarantee large configuration space, improve the shape of piston 42 and the degrees of freedom of allocation position.That is, the shape of piston 42 can be made simple, straight cylindricly, and can increase area of contact with cylinder 41

In addition, due to central joint 6 and to row coil hydraulic oil in 5 to row's direction, or the row's of giving direction of the hydraulic oil in central joint 6 and back-up ring 7 is radial direction, the central direction of central joint 6, therefore on central joint 6 thrust not to axial action.Therefore, central joint 6 can be made simple, straight general cylindrical shape, processing, preparation become easy.Further, due to plunger 42 not on cam disk 3, therefore can make cam disk 3 and cam motor 1 miniaturization.

Embodiments of the present invention more than have been described, but concrete structure is not limited to above-mentioned mode of execution, the change that designs in the scope that does not break away from main points of the present invention is included in the present invention.For example, in the above-described embodiment, to row coil 5 and back-up ring 7 for split, also can be integrated.In addition, quantity or the vertical-path 6d of central joint 6, the quantity of 6e etc. that can set piston 42 according to size or required moment of torsion, the revolution etc. of cam disk 3 are not limited to above-mentioned quantity.

Description of reference numerals

1 cam motor

10 cam motor speed reducer

2 main shafts

3 cam disks

The 3a camming surface

4 cylinder bodies

41 cylinders

42 pistons

5 coil to row

6 central joint

7 back-up rings

8 gear reducers

Claims

1. a cam motor, is characterized in that, it possesses:

Main shaft, it is configured to rotate freely centered by the axle center;

Cam disk, it is configured on described main shaft and is concentric with described main shaft, and its periphery is formed with camming surface;

Cylinder body, it is ring-type, and is configured to make described cam disk to be positioned at ring; And

A plurality of pistons, it is configured in interior all sides of described cylinder body, and it carries out free to-and-fro motion under front end and state that described camming surface contacts;

The shape of described camming surface is set for makes described cam disk be rotated along with the to-and-fro motion of described piston.

2. cam motor speed reducer, it possesses cam motor claimed in claim 1, it is characterized in that, and linking on described main shaft has gear reducer.