KR950009555B1 - Motor of the oscillating piston type - Google Patents

Abstract

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Description

Vane Type Fluid Drive Motors

1 is a longitudinal sectional view of a first embodiment of a vane motor taken along line I-I of FIG.

FIG. 2 is a cross sectional view of the vane motor taken along line II-II of FIG. 1 with the pivoting or vane piston and piston space segment uncut.

3 is a plan view from the direction of arrow III towards the vane motor of FIG.

FIG. 4 shows an embodiment of the piston space divider used in the embodiment according to FIGS. 1 to 3.

FIG. 5 shows the reinforcing element of the piston space divider shown in FIG. 4 with the seal of the space divider removed. FIG.

* Explanation of symbols for main parts of the drawings

1: motor housing 2: piston space

3: pivoting piston 7: split plane

10: Wonju-myeon 11, 11 ': Donation side

14 output drive member 19 color

22: bearing 23: bearing bushing

30: piston space divider 33: connection portion

40: rigid element 44: connector

45: recessed portion 47: sealing lip

53: screw 55: adjusting means

62, 62 ': stop 63: guide

70: shock absorber

The present invention relates to a vane-type fluid drive motor having a motor housing in which a piston space in which a vane (or rotary) piston, which vibrates during operation, is located, is arranged in a torque transmission manner by means of a bearing member. It is connected to a particularly axial output member which extends outwardly from the piston space and is radially connected from the bearing member to interact with the mating surface of the housing in a sealed manner, thus splitting the piston space into two working spaces for fluid drive. A vane, the bearing member having a sealing surface extending at least a distance in the circumferential direction with respect to the oscillation axis in the form of an outer surface of the circular cylinder, the sealing surface correspondingly sealing in the housing when the motor is operated. Combine with the means.

In general, such vane-type motors are used when the axial output member is rotated, especially when it is rotated while the direction of rotation is changed. As disclosed in Australian Patent 338,065, the motor can angularly move up to 270 °. For this purpose, the motor includes a bearing seal in the form of a slotted tubular member extending around the bearing of the pivoting piston so that when the pivoting piston is pivoted the sealing surface will extend to the corresponding seal fixed to the motor housing. . The piston space incorporating the pivoting piston has a circular sector shape as made by the pivot angle when viewed in a cross section perpendicular to the pivot axis, and this three-dimensional piston is dependent on the corresponding shape of the wall of the housing. The wall shape of the housing has a complex shape of motor housing and means, thus increasing the manufacturing cost. In another aspect, the corresponding seal in the housing takes time to replace due to wear. In addition, there is no means for adjusting or changing the pivot angle of the piston.

It is therefore an object of the present invention to provide a vane-type motor which is simple in structure and can be used for various different pivot angles.

Another object of the present invention is to provide a motor with low manufacturing cost and easy assembly.

A vane type fluid drive motor is provided to achieve the above and other objects as can be seen from the specification, claims and drawings of the present invention. The motor has a motor housing in which a piston space in which a vane piston vibrates during operation is arranged is arranged inside, the piston being torque-transmitted by a bearing member to a particularly axial output member which extends externally in the piston space. And a vane extending radially from the bearing member to interact with the corresponding surface of the housing in a sealed manner such that the piston space is divided into two working spaces by fluid drive, the bearing member being of a circular cylinder. The outer side has a sealing surface extending at least some distance in the circumferential direction with respect to the oscillation axis, which seals the corresponding sealing means to the housing when the motor is operated, as seen from the pivot axis direction. As shown, the piston space has a circular cross section, and the piston space divider It is mounted in the piston space so as to be in sealing contact with the inner wall surface of the tone space, and a corresponding seal is formed on the partition.

The basic shape of the piston space in this case is of particular advantage in terms of the manufacturing process, with the pivot axis extending through the center of the circular piston space when viewed in a cross section perpendicular to this axis. The radial distance between the pivot axis and both radial portions of the inner side of the piston space is constant over the entire circumference of the piston space. Both the vane piston and the piston space divider according to the invention have the function of dividing the piston space into two working spaces. There is no need for any part of the motor housing that is provided fixed to the housing for limiting the pivot space for the pivoting motion of the vane piston. The piston space divider formed separately in the motor housing can be placed in the piston space after manufacture of the housing without causing any problems. Depending on the maximum size of the pivot angle desired, a large or small piston space divider in the circumferential direction can be selectively employed. Therefore, it can be used for many kinds of motors by selecting the appropriate piston space divider when referring to the standard motor housing. If the piston space divider has the function of means for limiting the pivot angle, several different pistons can be used alternately to adjust the desired maximum pivot angle.

Another advantageous feature of the invention is described in the claims. If the motor housing adjacent to the piston space is divided into two axially continuous housing parts, the assembly of the pivoting vane piston and the piston space partition will be particularly simple.

The piston space divider is preferably in the form of a single insert which can be operated constantly. However, the piston space divider may also have a multi-part structure and consist of at least one rigid element to impart the required structural stiffness to achieve the desired function. This rigid element can be made of a rigid plastic material. The rigid element can have a seal provided outside of the outer space divider in order to engage with the adjacent inner side of the piston space to achieve optimal sealing performance. Since the load the rigid element must bear is a static load, it consists of a relatively soft material with satisfactory sealing properties. The seal of the air divider is preferably molded directly on the rigid element. In addition, a corresponding seal can be formed on the piston space divider by means of a seal of the space divider or other additional seals. However, it is particularly advantageous if some of the rigid elements are designed directly as corresponding seals because they have a very small wear rate. In this case, it is particularly advantageous if the sealing face of the bearing portion interacting with the corresponding seal is made of a softer material than the material of the rigid element.

It is convenient to provide at least one secure lock connection, in particular in the form of a plug connection means, for placing the piston space divider in the piston space. In the case of a motor housing in which the piston space is divided so as to form two axially adjacent housing parts, it is advantageous for the piston space partition to be combined with the respective housing part by a lockable connection, in particular a separable connection. The use of locking means or secure connection means can be fixed simultaneously at right angles and the two housing parts against one another, which facilitates assembly and reduces assembly defects.

In order to simply change the pivot angle of the piston, an angle setting means is provided to adjust the pivot angle outside the piston space, which acts in particular between the output part and the part fixed to the housing in the form of a motor housing. In this case, it is advantageous that the pivoting piston and in particular its pivoting vanes are not directly actuated by the pivot angle setting means and thus there is no damage. In addition, if necessary, the pivot angle can be limited to prevent the pivoting vanes from colliding with the piston space divider to prevent further damage.

The invention is described in detail below with reference to the embodiments shown in the accompanying drawings.

The pivoting vane motor according to an embodiment of the present invention has a motor housing 1 having a generally cylindrical shape. Inside the housing there is a piston space 2 which encloses the circumference of the pivoting piston 3 which is pivoted about the axis 4. The pivot shaft 4 preferably coincides with the longitudinal axis of the motor housing 1. In the piston space 2 the motor housing 1 is divided into two axially continuous housing parts 5, 6. The dividing surface 7 preferably passes through a piston space 2 extending at right angles to the pivot axis 4 adjacent to the axis center of the piston space 2. In the housing part, a stage is formed near the dividing surface 7 so that they are easily fixed.

As shown in FIG. 2, the piston space 2 has a circular cross section when viewed in the direction of the pivot axis 4. The piston space 2 is therefore circular and the pivot shaft 4 extends through its center. That is, the piston space 2 maintains an angle of 360 ° with respect to the central pivot axis 4.

In the present embodiment, the inner seedling surface 8 facing the piston constitutes a cylindrical circumferential surface, and is chamfered at a portion where the circumferential surface 10 and the base surfaces 11 and 11 'intersect. The longitudinal axis of the cylinder coincides with the pivot axis 4.

Here, in the case of the embodiment not shown, the circumferential surface l0 is bent outward to coincide with the increased diameter of the piston space 2 so that the two base surfaces 11, 11 'are mutually in the arcuate region. Connected.

The pivot shaft 4 coincides with the longitudinal axis of the output drive member 14 in the form of a shaft extending through the piston space 2 and on both outer sides 15, 16 of the motor housing of the housing 1. Extend out the floor and ceiling. Adjacent to the passage 17 through the housing, the output drive member 14 is supported to be rotated by the anti-friction bearing 18 into the piston space 2 or on the outer surfaces 15, 16. It is desirable to be. The output drive member 14 is fixed in the axial direction by the collar 19 on the lower side 15 and the restraining ring 19 'on the other side, respectively.

The output driving unit 20 of the output driving member 14 protruding to the outside from the lower side 15 may be connected to the part vibrated by the motor in a torque transmission manner although not shown in detail. An end portion 21 protruding outward from the opposite end portion is used in connection with the adjustment means described later. In the absence of such adjusting means, the output drive member 14 can be terminated in the motor housing 1.

The pivoting piston 3 has a bearing portion 22, which in this embodiment preferably has the form of a hollow cylindrical bearing bushing 23. Interlocking means are provided on the inner circumference, in which the bearing portion 22 is mounted in a torque transmission manner by engaging with an arc lock means formed corresponding to the output drive member 14. The mutual locking means according to this embodiment is sawtooth-shaped. Since the bearing portion 22 is preferably movable in the axial direction in the output drive member 14, the pivoting piston 3 automatically lines up with the piston space 2 and the output drive member 14 during assembly. Will be arranged into a phase.

The pivoting piston 3 also has a pivoting vane 25 which is made integral with the bearing part 22 and projects from the bearing part toward the radial circumferential surface 10 with respect to the shaft 4.

By engaging the piston space divider 30, the pivoting piston 3 divides the piston space 2 into two working spaces 31, 32 of different volumes, respectively. Connection ports 33 are respectively opened into working spaces 31 and 32 for supplying and removing fluid, in particular compressed air, to cause the pivoting piston 3 to vibrate about the pivot axis 4. . This oscillating motion is transmitted to the interlocking engagement output drive 14.

When this pivot movement is transmitted, the piston seal 29 formed on the pivoting piston 3 slides along the inner surface 9. The piston seal 29 is formed integrally with the vane portion 35 and the vane portion 34 formed at both ends of the axial direction of the bearing bushing 23 and extends in the circumferential direction of the bearing bushing 23 and has an annular shape. Preferably with a vane portion 34 extending around the pivoting vane 25. One bushing portion 35 cooperates with the corresponding base surfaces 11, 11 ′ in a sealing manner at the circumference of the output drive 14. The vanes 34 occupy vane edges oriented axially and radially and provide a sealing action between the pivoting vanes 25 and the inner side 9. Because of the bushing, there is an advantage of not requiring a separate shaft seal adjacent to the passage 17 through the housing.

When the pivoting piston 3 is in position, the piston space is annular and the pivoting vanes 25 engage with the circumference of the handling portion and extend into the annular space according to their position. The piston space divider described above is arranged at the position of another circumference of the piston space 2. In this way the annular space is divided into two working spaces 31, 32. In the assembled state, the sealing surface 37 is provided on the inner side of the piston space partition 30 facing the bearing portion 22. , A corresponding seal 36 is formed to interact with the (formed in the bearing 22) to provide a sealing action between the pivoting of the piston space divider 30. The sealing surface 37 with respect to the pivot shaft 4 is formed on the circumferential portion of the bearing portion 22 facing radially outward, and extends slightly in the circumferential direction to have a curvature similar to the outer circumferential surface of the circular cylinder. This may be constituted by the circumferential portion of the bearing bushing 23 as an example, which in the embodiment of the present invention is preferably provided on the surface of the bearing encapsulation 38 and slightly moves the bearing bushing 23 at the circumferential surface. Enclosed with the image.

The bearing seal 38 and the piston seal 29 are integrally formed with each other, and it is preferred that the two bushings 35 can constitute the axial end of the bearing seal 38 if desired. . The shape of the former seal may be injection molded or molded onto the pivoting piston 3 in a single unit and, if desired, other piston parts not described so far as part of other advantages of the present invention may be surrounded by this sealing structure. have. However, the end faces of the through bushing opening and the bearing bushing are preferably excluded.

The piston space divider 30 consists of a single insert and is arranged in the detachable and replaceable piston space 2. The wedge-shaped part may be preferred here as a single insert.

In order to separate the two operating spaces 31, 32 in a sealed state, the piston space partition 30 is sealed in engagement with the inner surface 9 of the motor piston space 2. For this purpose a seal 39 of the space divider is provided around the circumference of the radial and axial zone with respect to the axis 4 except for a part of the corresponding seal 36. In the illustrated embodiment, the seal 39 is in sealed contact with both the base surfaces 11 and 11 ′ and the circumferential surface 10. The sealing material of the cantilevered partition is a soft elastic body, and from the standpoint of the static sealing function, it is desirable to exhibit excellent action even after long use.

Nevertheless, the rigid element 40 shown in FIG. 5 is formed therein to allow the piston space divider 30 to withstand high pressure. Rigid element 40 has high strength and stiffness because of the particular design and / or material. The seal 39 of this space divider is arranged on the outer side of the rigid element 40 as shown in FIG. 4 to surround the rigid element. In the preferred embodiment shown, the rigid element 40 is a seal of the space divider in each portion, except for the portion 44, the portion adjacent to the corresponding seal 36 (detailed below). It is completely surrounded by the elastic material forming 39. Due to the ribbed surface structure as shown in FIG. 5, the rigid element 40 having many recesses 45 and protrusions 46 is a tight engagement between the rigid material on the inside of the element and the soft sealing material on the outside. The connection is made.

At least one sealing lip 47 is formed in the space dividing seal 39 to enhance the sealing effect, which is directed toward the pivot axis 4 in the contact area with the inner surface 9. It extends surrounding the rigid element 40 in the portion formed between the ends 48. In the illustrated embodiment, three sealing lips 47 of the piston space divider 30 facing towards the pivot direction 49 are provided, of which two lips are located at the edge while the third lip is arranged therebetween. do.

It is advantageous that the corresponding seal 36 be configured relatively rigid due to the dynamic sealing contact. This seal may be in the form of a separate part arranged in the piston space divider 30. However, the corresponding seal according to the preferred embodiment of the present invention is constituted by the part 50 of the rigid element 40 and this part is not covered in the corresponding position, that is to say without any space dividing seal. . As you look towards the corresponding seal 36, you will see a portion 50 surrounded by the elastic casing portion.

In securing the stability improvement, which is one of the other advantageous features of the present invention, the width of the piston space divider 30 measured in the circumferential direction with respect to the pivot axis 4 is widened in the radially outer circumference so that the cake piece Have the same shape. The rigid element 40 in this case has a support rib 51 extending radially in which the forming projection 46 extends in the pivoting direction and the height of the support rib is radially outward from the portion 50. Increases.

The piston space divider 30 is firmly connected with the housing wall defining the piston space 2 in order to be firmly supported in the pivot direction 49. In the case of the present invention, separate engagement connections are provided for each of the housing parts 5, 6 to facilitate their assembly since they can be assembled together in a special fixing manner. After being assembled with each other, the housing parts 5, 6 are firmly joined to each other using a series of screws 53 distributed along the circumference of the piston space 2.

It is preferable that the plug connection part which has the male and female parts is used as the engagement coupling means. In the embodiment shown, two recesses are provided which serve as first engagements 54 at both points in the two base surfaces 11, 11 ′ of the piston space 2. Several sets of engagement portions 54 to be fitted together are spaced apart from each other in the radial direction with respect to the pivot axis 4. Accordingly, in the assembled state, second or male coupling portions 44 that are pin-shaped protrusions exist on both axial sides of the piston space divider 30 adjacent to each other. These second coupling portions 44 are very robust because they are integral parts of the rigid element 40. As already explained and easily understood in FIG. 4, they protrude past the seal 39 of the elastic casing or space divider. As shown in FIG. 1, the first engagement portion 54 and the second engagement portion 44 are fitted to each other to set the position of the piston space divider 30 with respect to the motor housing 1.

Due to the detachable connection, the piston space divider 30 can be quickly replaced when worn out. Piston space dividers 30 having different widths in the pivot direction may be used to assemble the piston space dividers to provide vane-type motors having different maximum pivot angles. The connecting port 33 opens into one of the working spaces 31, 32 via the housing wall near the piston space divider 30.

The piston space divider 30 can also be used as an element for determining the pivot stroke of the pivoting piston 3. That is, at the shortest point of the stroke, the pivoting vanes 25 reach the piston space divider 30. This is achieved by selectively using different size piston space dividers 30 in the pivot direction to change the size of the pivot stroke. In order to completely eliminate this mechanical influence on the pivoting piston 3 and extend the life of the pivoting piston motor, it is located outside the piston space 2 and acts between the output drive member 14 and the integral part of the housing and pivots. It is convenient to provide means 55 for the setting of. Since this adjusting means 55 gives a wide range of adjustment, it has the advantage that the pivot angle of a pivoting piston motor can be optimally enlarged according to this invention. In this case, a pivot angle of 270 ° or more can be obtained. Nevertheless, as in the prior art, the adjusting means 55 can also be used in other pivoting vane motors designed differently.

A radially projecting pivoting contact 56 is arranged at the end 21 of the output drive 14 which extends out of the motor housing 1 in a torque transmission manner. This contact 56 is designed similarly to the pivoting piston 3 and has a bearing bushing 57 mounted on the output drive member 14 and pivots radially extending from the bushing 57 similar to the vanes. Setting lever 58, (see FIG. 3). At least one opposite contact 62, 62 ′, (fixed relative to the housing) extends in the movement path of the pivoting lever and can be redefined relative to the pivot axis 4 in the circumferential direction. The corresponding contact portions 62, 62 'are mounted on the circular arc guide portion 63 centered on the pivot shaft 4, and proceed. This guide portion 63 preferably extends 360 ° with respect to the bending center.

In the embodiment of the present invention, the circular arc guide portion 63 is composed of a circular groove 64 or a recess which is dug into the motor housing 1 from its upper surface. Corresponding contacts 62, 62 ′ are mounted to slide in recess 64 by means of a clamping element 66 consisting of screws, so that the slide movement in the longitudinal direction of the ring is possible and can be constrained at the desired point. In the illustrated embodiment, one corresponding contact 62, 62 ′ is provided for each of the two pivot directions, which can be fixed at a desired point along the circumference of the pivot axis 4.

Another preferred feature of the present invention is the coarse adjustment using the clamping element 66 and fine adjustment using the fine adjustment element 67 extending into the pivot trajectory of the pivoting lever 58. This fine adjustment element is a set screw inserted into the screw hole, for example fixed by a lockable nut 68. In this way accurate adjustment is possible even when the motor is under operating pressure.

In order to impart a cushioning effect to the contact system, each corresponding contact 62, 62 ′ is formed with an elastic dumping element or shock absorber 70. It is arranged in the pivoting lever 58 adjacent the contact 69 of each of the pivot levers 58 (proceeding on the corresponding contacts 62, 62 'to limit the stroke). Thus, the two complete layers 70 extend in each pivot direction 49 past each contact 69 and there is no buffer in the pivoting direction. When the shock absorber reaches and engages corresponding contacts 62, 62 ', it limits the extreme position as it absorbs energy while deforming to the buffered contact that travels over the corresponding contact. For example, the shock absorber 70 has a ring member shape and slides over the protruding contact 69. The two shock absorbers 70 are connected to each other on both sides by the spacer 71. In this direction, the elastic stop fixing part is provided so that it can be easily fixed to the pivoting lever 58. For example, NBR plastic can be used as such material.

The adjusting device can readjust the pivot range relative to the pivoting piston 3 and prevents contact between the pivoting vanes 25 and the piston space divider. In order to make the annular recess 64, a rear sleeve 72 in the form of a central sleeve can be provided and surrounded by a radial gap by the concentrically arranged annular elements 73. The concave portion 64 can make the two parts in an appropriate shape to take the desired shape, which facilitates attachment to the guide of the clamping element 66.

The piston space 2 adjacent to the piston space divider 30 may be non-round or flat for securing. The piston space divider 30 blocks the annular space extending around the output drive member and the bearing portion to provide at least a 270 ° pivotal movement space in which the piston is located.

Claims (16)

It has a motor housing (1) in which a piston space (2) in which a rotary piston (3) vibrates during operation is disposed, which piston (3) is piston space in a torque transmission manner by means of a bearing member (23). (2) A vane type fluid drive motor connected to an output member 14 extending outward and having a rotating vane 25 extending in a change direction from the bearing member 23, wherein: A dismountable piston space divider disposed in the piston space 2 for dividing the piston space 2 into two working spaces 31, 32 extending between the wall of the housing 1 and the bearing member 23 ( 30); The partition 30 has an inner rigid element 40 mounted on both sides in the axial direction with respect to the wall portion of the motor housing 1, and a space divider seal 39 surrounding the rigid element 40. And a rigid element 40 formed on the radially inner surface of the piston space divider 30 for sealing action in cooperation with the bearing member 23 and separated from the space divider seal 39 at a predetermined point. A vane-type fluid drive motor, characterized in that it is composed of a corresponding seal (36) formed by a portion thereof. The vane fluid drive motor according to claim 1, characterized in that the piston space divider (30) mounted in the piston space (2) is fitted to the wall of the motor housing (1) surrounding the piston space (2). . 3. The at least one connector according to claim 2, characterized in that at least one connector is formed on the piston space divider (30) and on the motor housing (1) with connecting portions (44, 54) for providing said fit connection. Vane fluid drive motor. 4. The vane fluid drive motor according to claim 3, wherein the connecting portion formed in the piston space divider (30) is a unitary protrusion (44) projecting outside the space divider seal (39). 2. The vane fluid drive motor according to claim 1, wherein the piston space divider (30) is fixed in the axially opposite end face region of the motor housing (1) by the connector (44, 54). 2. The vane fluid drive motor according to claim 1, wherein the rigid element of the piston space divider (39) is formed by injection molding. 2. The motor housing (1) according to claim 1, wherein in the piston space (2) the motor housing (1) is divided into two axially continuous housing parts (5) by a split plane (7) perpendicular to the pivot axis (4) of the piston (3). 6) A vane fluid drive motor, characterized in that divided into 6). 2. The vane fluid drive motor according to claim 1, wherein the space divider seal (39) has a plurality of seal lips (47). It has a motor housing (1) in which a piston space (2) in which a rotary piston (3) vibrates during operation is disposed, which piston (3) is piston space in a torque transmission manner by means of a bearing member (23). (2) A vane-type fluid drive motor connected to an output member l4 extending outward and having a rotating vane 25 extending radially from the bearing member 23, wherein: outside the piston space 12 A device 55 formed to operate between the output member 14 and the motor housing 1 to adjust the pivot angle of the rotary piston 3; The device 55 operates in connection with a corresponding contact device mounted on the housing 1 and has a pivoting contact 56 mounted on the output member 14, the corresponding contact device being in the pivot direction. A vane fluid drive motor, characterized in that it comprises two adjustable and lockable stops (62, 62 ') that operate at right angles to said pivot direction that can have two directions in an elongated circular guide (63). 10. The vane type drive motor according to claim 9, wherein the pivoting contact portion (56) has a vane pivoting lever (58) projecting radially from the output member (14). 10. The method of claim 9 wherein the at least one stop 62, 62 'is provided with a fine adjustment element 67 protruding along the pivoting trajectory of the pivoting contact 56 for fine adjustment of the pivot angle. A vane type drive motor. 12. The vane drive motor as claimed in claim 11, wherein the fine adjustment element (67) is a screw that is adjustablely mounted on a corresponding stop (62, 62 '). 10. The vane according to claim 9, characterized in that the stops (62, 62 ') are detachably fixed to the circular guide (63) by a clamping element (66) for rough adjustment of the pivot angle. Drive motor. 10. The vane type drive motor according to claim 9, wherein the circular guide portion (63) is formed by a recess portion (64) of an annular surface on the motor housing (1). 15. The sleeve-shaped extension enclosing the output member (14) is provided for forming the recessed portion (64) of an annular surface in the motor housing (1), the extension being fixed to the motor housing (1). A vane type drive motor, characterized in that it forms a radial clearance between the element (73) and the extension as it is surrounded by concentric annular elements (73). 10. The pivoting contact portion 56 according to claim 9, wherein the pivoting contact portion 56 faces the pivot direction and acts in connection with the stops 62 and 62 'and has a shock absorber 70 formed in the region of the contact portion 69 thereof. The shock absorber 70 is such that the associated shock absorber 70 collides with the stop before it reaches its final position in a pivoting motion in which the contact 69 strikes against the stops 62, 62 ′. Vane drive motor, characterized in that protruding upward.