JPH1134680A - Driving mechanism to drive direction turning member arranged into tandem - Google Patents

Abstract

PROBLEM TO BE SOLVED: To install a hydraulic motor and a driving sprocket in a narrow space. SOLUTION: Driving mechanisms 10, 110 to drive a first and a second direction turning members 12, 14, 112, 114 arranged in a tandem comprise a first and a second sprockets 16, 18; 116, 118 to be driven, hydraulic motor 20; 120, and a first and a second driving sprockets 22, 24; 122, 124 and a first and a second chains 26, 28; 126, 128 on the easing of a hydraulic motor and the respective chains are joined to the sprockets to be driven and the driving sprockets. The hydraulic motors are low speed high torque motors and comprise radial cylinders and rotating casings. The motors are practically housed in the chain cases 30; 130.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive mechanism for driving first and second directional change members disposed in tandem, and a first and second tandem type for changing direction of a vehicle. And a mechanism set for driving the direction changing member. The mechanism includes first and second driven sprockets respectively fixed to the first and second diverting members, a motor casing, a reaction member integrated with the motor casing, a reaction member and a cylinder.・
A hydraulic cylinder having a cylinder block mounted for rotation about a relative axis of rotation, said cylinder block comprising a plurality of sets of cylinders adapted to receive a supply of pressurized liquid. And first and second drive sprockets mounted to be rotated by a hydraulic motor, and first and second chains disposed in a chain case. Is engaged with a first driven sprocket and a first driving sprocket, and the second chain is configured to engage a second driven sprocket and a second driving sprocket. I have.

[0002]

2. Description of the Related Art Mechanisms of this type are already known and are equipped on compact loaders and earth mover type vehicles. Such vehicles have a mechanism 2 of the type described above.
One set for the two vehicles on the right and one for the two vehicles on the left. In this way, it can be guaranteed that the two wheels of the side wheels belonging to the same group rotate at the same speed, but the wheels of the two groups are
If they are driven by separate motors, the steering of the vehicle becomes easier to control. For example, in the case of a compact loader, such a mechanism allows the wheels of the right group and the wheels of the left group to rotate at different speeds, or even in opposite directions, whereby the vehicle By being able to fold back in narrow places, it becomes very maneuverable.

[0003] At least one of the tandem-type turning members may be different from a wheel, for example, a crawler track. In particular, in the case of a loader, it is desirable to make the vehicle as small as possible. Therefore, a very small space must be able to accommodate the various series of elements of the two mechanisms that drive each of the two tandem vehicles. The driver's seat, the cab, and the various controls must also be accommodated, as well as the power transmission including the pump, in particular for supplying fuel to the hydraulic motor, and the motor for starting the pump. The hydraulic motors used in the prior art to turn a vehicle of this type are typically older motors connected to a step-down gear or high speed axial piston motors. The drive sprocket is disposed on the output shaft of the hydraulic motor, penetrates into the chain case, and includes first and second drive sprockets.
Chains engage each other.

A motor having a step-down gear and an output shaft is relatively large. Even if the motor is installed in the chassis of the vehicle to make a small vehicle, a considerable space is required in the chassis, and the drive sprocket for the chain is considerably protruded from the motor. Is subjected to considerable stress, and corresponding dimensions are required.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved small vehicle that can be mounted in a small space, and in particular, that a hydraulic motor and a drive sprocket can be arranged in a small space. To provide a driving mechanism.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a hydraulic motor, wherein the hydraulic motor is a low-speed high-torque motor, the cylinder of which is radially disposed around the axis of rotation, and the reaction member of which has a plurality of round protrusions. A corrugated cam, the cylinder block of which is fixed, the reaction member and the motor casing are mounted so as to rotate around the rotation axis, and the drive sprocket is equipped with the motor casing. And that the motor is substantially housed in the chain case.

It can be seen that the use of a low-speed, high-torque hydraulic motor eliminates the gears often required in the prior art. Furthermore, by choosing a motor whose cylinders are arranged radially,
The motor can be made considerably smaller in the axial direction. Further, the use of a "rotating casing" motor allows the drive sprocket to be mounted directly on the motor casing, thus eliminating the drive shaft supporting the sprocket. Thus, the problems present in the prior art can be avoided because the prior art sprocket protrudes from the motor.

According to the present invention, most of the motor is located in the chain case. As a result, it is possible to realize a mechanism that is considerably smaller than the conventional technology, in which the width measured in the axial direction of the motor is equal to or greater than the sum of the width of the chain case and the length of the motor.
According to the present invention, the total width is substantially equal to the width of the chain case. If the total width of the motor is slightly larger than the width of the chain case, only a small part of the motor will be inserted into the inspection holes typically located in the case wall to work on the chain. Because it can be extended,
There is no need to increase the width of the case.

A low-speed high-torque motor used in the present invention, which is called a "slow motor", has a rotating casing whose rotation speed is from 70 rotations / minute (rpm) to 300 rotations / minute.
Spin at normal operating speeds in the range of minutes. For example, in the case of a motor mounted on a small loader, the rotation speed is about 75 r. p. m and the displacement is in the range of 1 liter / revolution to 3 liters / revolution (1 / r). Further, the motor is rotated with the motor casing about the axis of rotation and has a rotating part with a distribution duct suitable for communication with the cylinder, and a distribution duct of the internal fluid distribution device configured to not rotate about the axis of rotation. Distribution means having an inlet duct suitable for communication with the outlet and a fixed part with an outlet duct.

[0010] Advantageously, the fixed part of the distribution means has a "connecting" end face in which the inflow duct and the outflow duct are open, the end of which duct is located in the connecting face and the chain The case is provided with a "coupling wall" having a fixing element for fixing the motor and at least one opening through which fluid can flow in and out via said inflow and outflow ducts.

With these arrangements, the inflow duct and the outflow duct, like the other ducts which serve the function of the motor, are brought together on the connecting surface of the motor and are easily accessible via the connecting wall. Since the pump is generally located in the space inside the vehicle, the connecting wall may be located inside the vehicle so that the motor can be connected to a short external pipe. This is especially true if the two mechanisms for feeding each of the tandem side wheels are housed in separate cases.

Advantageously, at least one drive sprocket is arranged on the outer periphery of the "cam" part of the motor, and the corrugated cam is arranged on the inner periphery of said cam part.

With this arrangement, the cam located on the inner peripheral edge of the cam portion and the drive sprocket located on the outer peripheral edge of the cam portion can be manufactured in one common manufacturing process. Several advantages are provided, including the ability to simplify the motor manufacturing process. Advantageously, both drive sprockets are arranged on the cam.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood and its advantages will become clearer on reading the detailed description of an embodiment, given by way of non-limiting example, with reference to the accompanying drawings, in which: FIG.

[0015]

FIG. 1 is a sectional view taken along the line II of FIG. 2, and for simplicity, some elements of the mechanism, in particular the motor, are represented only by contours. .

A mechanism 10 shown in FIG. 1 drives first and second wheels 12 and 14 of a vehicle, and the wheels are arranged in tandem.

This mechanism comprises a first driven sprocket 16 connected to a shaft 17 of the wheel 12 and a shaft 19 of the wheel 14.
, A first driven sprocket 22 and a second driven sprocket 22 equipped with a casing for a motor 20 and mounted to be rotated by the motor; First and second chains 26 and 28 disposed
It is composed of

A first chain 26 engages the first driven sprocket 16 with the first driven sprocket 22, and a second chain 28 is formed with the second driven sprocket 18 and the second driven sprocket. 24 is engaged.

FIG. 2 is a plan view of the first tandem wheel 1.
A set consisting of a first mechanism 10 for driving the second and the second mechanism 14 and a second mechanism 110 similar to the first mechanism for driving the second tandem wheels 112 and 114. is there. Since the two mechanisms are similar, the mechanism 110 is represented by the same reference numeral as the mechanism 10 plus 100.

The set shown in FIG. 2 can be used to drive two pairs of tandem wheels mounted on a vehicle such as a compact loader or earth mover. Then, two chain cases 30 and 130 are mounted on the chassis of the vehicle, which chassis is indicated diagrammatically by the reference numeral 32 in FIG.

Next, the hydraulic motor 20 equipped with the mechanism 10
Will be described with reference to FIG.

The motor has a reaction member (cam 42, a cam 42 comprising a casing consisting of two parts 40A and 40B assembled by screws 41, and a corrugated cam 42 formed on the inner peripheral edge of the casing part 40A. The cross-sectional diagram of FIG. 1 is easier to understand, but the other internal components of the motor are not shown.) And the cylinder block 44 disposed in the casing, the casing is connected to the cylinder block. On the other hand, the cylinder block is mounted so as to rotate relatively around the rotation axis 46, and the cylinder block is radially disposed around the rotation axis 46, and includes a plurality of cylinders 48 to which pistons 50 are slidably mounted. The pistons are, of course, radially arranged and adapted to receive a supply of pressurized fluid; The outer radial end is adapted to be responsive to the corrugated cam 42 and to communicate with a cylinder duct 56 for supplying pressurized fluid to the cylinder 48. Distribution duct 54
Is provided, the distributor constitutes a rotating part of the distributing means, and the distributor constitutes a fixed part of the distributing device. Depending on the rotation direction of the motor, the fluid supply function or the fluid discharge With the fixed distribution core 58 on which the ducts 60 and 62 performing the functions are arranged, the ducts 60 and 62
Are connected to the axially outer periphery of the core 58 and the inner fluid distributor 5.
A respective groove 6 arranged between the two grooves 6
4 and 66, the distribution duct 54
And an opening in these grooves so as to communicate with the duct 60 or 62.

The grooves 64 and 66 are displaced from each other and are disposed at an axially stepped portion between the outer shaft surface 59 of the core 58 and the inner shaft surface 53 of the inner fluid distributor 52. Sealed by gaskets 68, 70 and 72. The distribution duct 54 is provided on the distribution surface 74 of the distributor 52, which is held by mechanical deflecting means (eg one or more springs 75) or hydraulic compression means, of the cylinder block in which the cylinder duct 56 opens. It is open adjacent to the transmission surface 76.

Although both the cylinder block 44 and the core 58 are configured so as not to rotate around the rotation axis 46 (they may be of an integral structure), the casings 40A and 40B
And the dispenser 52 rotates about said axis, and the dispenser is mounted on the casing by any suitable means, such as, for example, a fluting or opening and closing system, or a stud and notch system (not shown). It is configured to rotate with the portion 40B.

The casing portion 40A is disposed in a rolling track formed by two opposing grooves 82 and 84 respectively disposed in the inner axial surface of the casing portion 40A and the outer axial surface of the cylinder block 44. The bearing 78 is rotatably supported with respect to the cylinder block by a bearing 78, which is advantageously comprised of a rolling bearing having four contacts consisting of balls 80. Of course, it is also possible to use other types of bearings, for example conventional ball bearings or conical bearings, but in particular in the context of the present invention a ball bearing with four contacts has a casing part 40A in which The advantage is that when rotating, very little axial space is required to support it.

The inside of the motor has a sealing gasket 8
6 and 88 seal from the outside.

The cylinder block is axially tightened against the core 58 by a retaining ring 90 or other equivalent means.

Further, the motor has a first brake member fixed to the cylinder block so as not to rotate around the axis 46, and a second brake configured to rotate together with the casing around the axis 46. And a brake system having a member. The braking system also includes means for pushing and releasing the two brake members against each other for cooperative braking.

More particularly, in the brake system of FIG. 3 showing an advantageous example, the first brake member has a brake piston having a first axial coupling portion 102 on the outer axial periphery. A first series of meshing clutch teeth 96 are provided that are integral to the radial surface 98 of 100 and are located in the axial extension of the cam 42 that extends over the piston 100. Second
Cooperate with the axial coupling portion 104 of

The second brake member is provided with a second series of teeth 92 integrally formed on the lateral surface of the cylinder block 94. The second coupling part constitutes an extension to the cam, so that its inner contour is similar to the contour of the cam wave reaction. The outer contour of the first coupling part has a shape complementary to the inner contour of the second coupling part, so that the piston 100 can be fixed and rotated with the casing part 40A. And a surface through which the brake torque can pass.

The brake system further includes a brake release chamber 106 adapted to receive a supply of pressurized fluid via a brake release duct 108 and the piston 10
0 away from the cylinder block, thereby terminating the cooperation between the meshing clutch teeth 92 and 96.
The action of the fluid contained in the brake release chamber is, for example,
Against the action of the elastic return means 107 constituted by a conical spring washer or a helical spring, the piston 100 is continuously pushed in the direction of the cylinder block. The surface 94 with the first series of teeth 92 of the cylinder block is the surface closer to the inner distributor 52, and the piston 100 is received in an annular space arranged on the distributor.

Therefore, the motor brakes can be assembled in the smallest size in the axial direction. The outer periphery of the casing part 40A of the motor 20 is provided with drive sprockets 22 and 24 already described with reference to FIG.

[0033] Advantageously, at least one of the drive sprockets is arranged on the outer periphery of a "cam" part of the motor casing, the cam being formed on the inner periphery. This is because, in the illustrated case, both sprockets 22 and 24 are disposed on the outer perimeter of casing portion 40A, which is a cam section because cam 42 is provided on its inner perimeter. Is formed.

The motor illustrated by the example of FIG. 3 has a casing consisting of only two parts and has a second part 40.
B has essentially the shape of a vertical end plate that closes the motor near the distributor. However, the second portion 40B may be configured to support a sprocket. Similarly, depending on the case, in particular on the shape of the bearings that support the casing when rotating with respect to the cylinder block, the casing may be made up of three parts and only the central part may be provided with a cam. And the first and second drive sprockets may be formed on the outer periphery of two separate parts of the casing of the motor. Advantageously, one of these parts of the casing is constituted by a cam part.

[0035] Advantageously, each of the sprockets has an integral construction with the casing in which it is arranged. Such a shape can limit the number of parts forming the motor, thereby simplifying its assembly. In particular, one or both sprockets as shown in FIG. 3 are integral with the cam of the motor casing, reducing the number of parts that are difficult to machine.

As a variant, at least one of the drive sprockets may be formed on a part which is separate from the motor casing and which is fixed to the casing by fixing means for rotating it with the casing. A possible realization of this variant is represented by the dashed line in FIG. 3, in which the drive sprocket 22 is in the form of a toothed ring and, via its inner periphery, a casing part 40.
A indicates that it can be configured in the form of a separate part 22 ′ that can be fixed to A. Means for securing it and rotating it with the casing may use an assembly mode such as, for example, an interference fit, axial or helical fluting, or other coupling means.

In the example shown in FIG. 3, the motor casing is supported such that it rotates with respect to the cylinder block by a single bearing 78. The two drive sprockets 22 and 24 are located in a region close to the bearing and in particular extend substantially above the cam 42. They both extend on the same side as seen from the bearing 78, provided on the side of the cylinder block remote from the distributor,
The cylinder block has a radial flange 44A in which the groove 84 of the bearing 78 is formed.

According to a variant, it is chosen to arrange one of the drive sprockets on the first side of one bearing with four contacts and to arrange the other drive sprocket on the opposite side. It is also possible. This variant is particularly advantageous if the bearing can be located in the center of the motor, for example, where the cylinder block has two groups of cylinders that are axially spaced,
Between these groups, a flange is provided, which can be realized if the outer axial periphery has an inner rolling groove of a bearing with four contacts. If it is desired to increase the displacement of the motor, or if the invention is to be applied to a motor having two separate operating displacements, it is advantageous to select a group of two cylinders.

In yet another variant (not shown), the motor is equipped with two separate bearings, which are conventional ball bearings or conical bearings, arranged on either side of the cylinder block, The rolling track is, for example, integrally formed with the casing of the motor and the cylinder block, respectively, or is formed in a separate bearing ring, and is configured such that each is fixed to the casing and the cylinder block. You can also. In that case, the drive sprocket is advantageously arranged substantially facing each of the two bearings, so that they can be prevented from projecting.

In the motor shown in FIG. 3, the fixed part of the distribution means, ie the fixed core 58, has an end face 58A in which the respective ends 60A and 62A of the inflow duct and the outflow duct are located. doing. Thereafter, the end face 58A
Is referred to as the "contact surface". The communication surface is located on the side of the motor remote from the inner fluid distributor 52.

When the motor is described as "substantially housed" in the chain case, it means that the motor is almost entirely mounted on the case, unless the coupling surface projects slightly from the case. Understand that it is located inside. In the example shown, ends 60A and 62A extend in a plane substantially transverse to axis of rotation 46. Alternatively, the coupling surface may be formed by the end of the outer axial surface of core 58 that projects from the chain case when the motor is secured thereto.

In that case, the ends of the inflow duct and the outflow duct may be located in this axial part, so that in certain configurations where access to the motor of the shaft is difficult, the inflow duct And the outflow duct can be connected to an external pipe arranged radially to the motor.

In any case, the chain case 30
A fixing element for fixing the motor, and a connecting wall 31A provided with an opening for allowing supply and discharge of fluid through the inflow duct and the outflow duct 60 and 62.
have. In the example shown by the advantageous variant, the fixing element of the case is arranged on the connecting wall 31A and is constituted directly by said wall.

However, the motor may be fixed to another part of the case 30. Particularly, due to its axial dimension, the side wall 3 of the chain case 30 away from the connecting wall 31A.
1B, and it may be advantageous for the motor fastening means to be located on the casing 40B of the motor remote from its coupling surface.

FIG. 4 is a very diagrammatic view from the outside of the connecting wall 31A of the case, which wall also serves as a fixing element of the motor. An opening 33 in which the motor connection surface 58A is located is provided in the connection wall 31A. Motor inlet and outlet duct ends 60A
62A and the end of the leak return duct 63A are located on the coupling surface. If the coupling surface is also equipped with a selector slide for the motor to select the displacement, the motor will have an orifice in the irrigation duct or other hydraulic type to control such a slide. Other orifices, such as duct orifices, are provided. Similarly, on the connecting surface,
A link other than the hydraulic link used for controlling the motor-operated valve, for example, an electronic link 67, and a sensor for detecting the rotation speed of the motor provided in the motor may be provided.

Advantageously, in the example shown in FIG. 4, a single opening 33 of an appropriate size is provided in the connecting wall 31A of the chain case 30 so as to be located at the connecting surface of the motor. It is configured to provide access to all couplings, hydraulics, electricity, or other orifices. It is also possible to arrange a plurality of openings, each facing one or more orifices on the coupling surface of the motor.

As shown in FIG. 3, the cylinder block 44 of the motor extends substantially across the axis of rotation and extends on the same plane as the connecting surface 58A for securing it to the connecting wall of the chain case. End face 45 on which the means is arranged
have. The fixing means comprises, for example, an axial hole 47 arranged in the cylinder block, more precisely in its flange 44A, and the connecting wall 31A of the chain case 30.
A corresponding hole 4 for receiving a fixing screw, opened in
9.

The chain case 30 contains oil for continuously lubricating the chain of the mechanism. The motor is arranged so as to completely close the opening of the connecting wall so that oil does not flow out of the chain case.
Optionally, if sealing is required, a sealing gasket may be provided between the motor and the inner surface of the connecting wall of the chain case.

In FIG. 2, the connecting wall 31A of the chain case is shown.
And the connecting walls 131A of the chain case 130 face each other, and a space 150 is provided between the two chain cases 30 and 130. This space is located in the center of the vehicle, and in particular, such as the transmission and elements of the hydraulic circuit 160, which are highly diagrammatically represented by boxes.
Various elements can be received, in which the leak ducts from the two mechanisms of hydraulic motors 20 and 120 are connected via external pipes 63 'and 163',
Similarly, their inlet and outlet ducts are connected via external pipes 60 ', 62', 160 ', 162, respectively. Various control devices for controlling the vehicle can also be located in this space 150, and the driver's seat can also be located above this space.

FIG. 5 shows another configuration of two sets of mechanisms, 210 and 310, each of which has two wheels 212 and 214 of a first tandem wheel and a second tandem wheel. It drives two wheels 312 and 314 of the wheels. Mechanisms 210 and 310 are 220 and 32, respectively.
0, which are the motors 2
0 and two driven sprockets, designated 216 and 218 and 316 and 318, respectively,
12, 214, 312, 314 axes 217, 219, 3
17, 319. They are, respectively,
Drive sprockets 222, 22 for motor 220
4 and, for motor 320, drive sprockets 322 and 324, which are formed on the casing of the motor.

In each mechanism, the wheels, with respect to the first mechanism 210, are sprockets 222 and 21
6 and a chain 228 engaging sprockets 224 and 218, and with respect to the second mechanism 310, a sprocket 316.
Chain 326 for engaging the sprocket 3
Driven by a chain 328 that engages 18 and 324.

The mechanisms 210 and 310 are similar to the mechanism described above together with the modified example, but different from the modified example shown in FIG. 2, the chain case of the first mechanism and
The chain case of the second mechanism together forms a common chain case 430 that houses the sprockets and chains of both mechanisms and substantially houses the motors 220 and 320. By describing the motor as "substantially" housed in the case 430, the motor is disposed almost entirely within the casing, but its respective coupling surface is optionally slightly The aim is to specify that it may protrude from the condition.

FIG. 5 shows external pipes 260 'and 262' connected to the inlet and outlet ducts of motor 220.
And external pipes 360 and 362 'connected to the inflow and outflow ducts of the motor 320. FIG. 5 also shows external pipes 263 'and 363' connected to the leak return ducts of motors 220 and 320, respectively. These pipes are connected to the chain case 430
431A and 431B respectively, and the wall is provided with an opening for accessing the connection surface of the motor.

In the example of FIG. 5, the motors 220 and 320
The fixing element of the case fixed to the motor is preferably 431A for the motor 220 and 4
31B is constituted by each connecting wall. The chain case is located on the chassis 432 of the vehicle, said chassis being shown completely diagrammatically. The chassis may also include the components of a vehicle transmission and a control device, the control device comprising the mechanism set shown in FIG.

The shape shown in this figure allows the various elements of the transmission to be arranged on the chain case, so that the lateral spacing (track) of the vehicle wheels is not restricted in height. This is particularly advantageous when it is desired to be as narrow as possible.

[Brief description of the drawings]

FIG. 1 is a side view of a mechanism of the present invention suitable for driving a pair of wheels arranged in tandem.

2 is a plan view showing two mechanisms, similar to the one shown in FIG. 1, suitable for driving two pairs of wheels arranged in a tandem of a vehicle.

FIG. 3 is a sectional view of the motor of the mechanism of the present invention cut in an axial direction.

FIG. 4 is a view as seen in the direction of arrow IV in FIG.

FIG. 5 is a diagram showing a modified example similar to FIG. 2;

[Explanation of symbols]

10, 110, 210, 310 Driving mechanism 12, 112, 212, 312 First turning member 14, 114, 214, 314 Second turning member 16, 116, 216, 316 First driven sprocket 18, 118, 218, 318 Second driven sprocket 20, 120, 220, 320 Hydraulic motor 22, 122, 222, 322 First driving sprocket 22 'Separate part 24, 124, 224, 324 Second driving sprocket 26 , 126, 226, 326 First chain 28, 128, 228, 328 Second chain 30, 130, 430 Chain case 31A, 131A, 431A, 431B Connecting wall 33 Opening 40A Motor casing (part) 40B Motor casing ( Cam part) 42 Reaction member (waveform) Cam) 44 cylinder block 45 end face 46 rotation axis 47 fixing means 48 cylinder 50 piston 52 rotating part 54 distribution duct 58A connection surface 60 inflow duct 62 outflow duct 78 single ball bearing

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Les Yaoan Pascal, Schwaiau-Bac, France, Squire Paul Far 10 (72) Inventor Letuc Danny, Bellbury, France, Rue de Saintine 19 Bis (72) Inventor Mahi Gilbert Senlis, France, Rue de la Forelle 3 (72) Inventor Ponnay Jean-Noel Craire, France Rue Robert Schumain 90 Bis (72) Inventor Siquija Vincent France Tracy-les-Monts, Ryu de Mouren 7

Claims (13)

[Claims] A first and a second diverting member (12, 14; 112, 114; 212, 21) arranged in tandem.
4; 312, 314).
0, 110; 210, 310), wherein the first and second driven sprockets (16, 18; 116, 11) are respectively fixed to the first and second turning members.
8; 216, 218; 316, 318), a motor casing (40A, 40B), a reaction member (42) integral with the motor casing, and a rotation axis (46) relative to the reaction member. A hydraulic motor (20; 120; 22) having a cylinder block (44) mounted for rotation.
0; 320), the cylinder block having a plurality of sets of cylinders and pistons (48, 50) suitable for receiving a supply of pressurized fluid, and mounted for rotation by a hydraulic motor. The first and second drive sprockets (22, 24; 12)
2, 124, 222, 224; 322, 324) and the first and second chains (26, 28; 126, 128) disposed in the chain case (30; 130; 430).
226, 228; 326, 328), the first chain engages the first driven sprocket with the first driven sprocket, and the second chain engages the second driven sprocket with the second driven sprocket. A hydraulic motor (20; 120; 220; 320), wherein the hydraulic motor (20; 120; 220; 320) is a low-speed, high-torque motor, the cylinder (48) of which radially surrounds the axis of rotation (46). The reaction member (42) is a corrugated cam having a plurality of round protrusions, the cylinder block (44) is fixed, the reaction member (46) and the motor casing (40A, 40B). Are mounted for rotation about the axis of rotation and the drive sprocket (2
2, 24; 122, 124) are equipped with a motor casing, and the motor is a chain case (30, 13).
(0,430). 2. The motor (20; 120; 220; 32)
0) is further rotated with the motor casing (40A, 40B) around the axis of rotation (46) and is suitable for communicating with the cylinder (48).
4) and a rotating part (52) provided with the rotating axis (4).
6) a fixed part adapted to be non-rotating around and provided with inlet and outlet ducts (60, 62) suitable for communicating with the distribution duct (54) of the inner fluid distributor; (58), the fixed part (58) of the distributing means having a "connecting" end face (58A) with the inlet and outlet ducts (60, 62) open, said duct being , End portions (60A, 62A) located on the connecting surface, and a chain case (30; 130; 4).
30) fixed elements (20; 12) for mounting the motor.
0; 220; 320) and at least one opening (33) through which fluid can be supplied and discharged via said inlet and outlet ducts (60, 62).
The mechanism according to claim 1, wherein (31A; 131A; 431A; 431B) are provided. 3. A fixing element to which the motor (20) is fixed is provided on a connecting wall (31A, 131A, 431A, 431B) of the chain case (30, 130, 430). 3. The mechanism of claim 2, wherein 4. The connecting surface (58A) extends transverse to the axis of rotation (46), and the motor cylinder block (44) is in the same substantially lateral plane as the connecting surface (58A). An extending end surface (45), said end surface comprising:
4. The mechanism according to claim 3, comprising fixing means (47) for fixing it to the connecting wall of the chain case. 5. At least one of the drive sprockets (22, 24) is connected to a "cam" portion (40) of the motor casing.
A) is disposed on the outer peripheral edge of the corrugated cam (4).
The mechanism according to any one of claims 1 to 4, wherein 2) is disposed on an inner peripheral edge of the cam portion. 6. The mechanism according to claim 1, wherein the drive sprocket (22, 24) is integral with the motor casing part (40A). 7. A motor casing having at least first and second portions, wherein the mechanism is such that the second drive sprocket (22) is integral with the first portion of the motor casing, A mechanism according to any one of the preceding claims, wherein the drive sprocket (24) is integral with the second part of the motor casing. 8. At least one of the drive sprockets (22) is formed on a portion (22 ') separate from the motor casing (40A) and is fixed to the casing by fixing means for rotating with the casing. The mechanism according to any one of claims 1 to 5, wherein the mechanism is provided. 9. A motor casing (40A, 40B)
Is supported rotatably relative to the cylinder block (44) via a single ball bearing (78) having four contacts. The mechanism according to claim 1. 10. A first and a second drive sprocket (2).
10. Mechanism according to claim 9, wherein (2,24) are arranged on either side of a single bearing with four contacts on the motor casing. 11. First and second vehicles for turning a vehicle.
Tandem-type turning member (12; 14; 112; 11)
4) a set for driving said first and second tandems, said set comprising first and second mechanisms (10, 110) according to claims 1 to 10, respectively. A pair characterized by: 12. A second and a second for turning the vehicle.
A set for driving a tandem turning member of
The first tandem (12, 14) and the second tandem (11
2, 114), respectively, for the first and second mechanisms (10, 1) according to claim 2 and any one of claims 1 to 10.
10), the connecting wall (31A) of the chain case (30) of the first mechanism (10), and the second mechanism (2).
5) Connecting wall (131A) of chain case (130)
Are facing each other and a space (150) is provided between said walls. 13. A turning member (212, 21) for a vehicle.
4; 312, 314) for driving the first and second tandems, wherein the first tandem and the second tandem respectively correspond to the first tandem according to any one of claims 1 to 10. And the second mechanism (2
10, 310), and the chain case of the first mechanism and the chain case of the second mechanism are sprockets (216, 218, 222, 22) of the first and second mechanisms.
4, 316, 318, 322, 324) and a common chain case (430) that houses the chains (226, 228, 326, 328), and substantially houses the motors (220, 320). A mechanism group characterized by the following.