JP2019035361A - Vane motor - Google Patents

Abstract

To improve assemblability of a vane motor.SOLUTION: A vane motor 100 comprises: a rotor 2 where a plurality of slits 2a are formed radially, wherein the slit are connected to an output shaft 1 and opened on an outer peripheral surface; a plurality of vanes 3 each slidably housed in the slits 2a; a cam ring 4 which has a cam surface 4a formed on an inner peripheral surface, and on the cam surface, a tip part 3a of the vane 3 slides; and energization members 8, 18, 19 provided in the slit 2a, and configured to perform energization so as to press the vane 3 against the cam surface 4a. The vane 3 and the energization members 8, 18, 19 are integrally formed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vane motor.

  Patent Document 1 describes a vane motor including a rotor in which a plurality of slits are formed in a radial direction, and a plurality of vanes that are slidably accommodated in the slits and whose tip surfaces are in sliding contact with the cam surface of the cam ring. ing. This vane motor further includes a spring provided between the bottom of the slit and the vane, and the biasing force of this spring acts to press the vane against the cam surface of the cam ring, thereby ensuring the startability of the vane motor. ing.

JP 2012-2136 A

  When assembling the vane motor described in Patent Document 1, first, a spring is assembled in each slit, and then the vane is inserted into each slit so that the spring and vane assembled in the slit are engaged at a predetermined position. Need to be carefully inserted into. Thus, there is a possibility that the manufacturing cost of the vane motor may be increased due to an assembling process requiring skill, and there is a risk of causing an assembly error such as forgetting to attach the spring or poor engagement between the spring and the vane.

  The present invention has been made in view of the above-described problems, and an object thereof is to improve the assemblability of the vane motor.

  According to a first aspect of the present invention, there is provided a rotor in which a plurality of slits that are connected to an output shaft and open on an outer peripheral surface are radially formed, a plurality of vanes that are slidably received in the slits, and a tip end portion of the vane is slid. A cam ring having a cam surface that is in contact with the inner peripheral surface and a biasing member that biases the vane against the cam surface. The vane and the biasing member are integrally formed. And

  In the first invention, the urging member that urges the vane to press against the cam surface of the cam ring is formed integrally with the vane. For this reason, a biasing member can be assembled | attached in a slit only by inserting a vane in the slit of a rotor. As a result, the number of man-hours for assembling the vane motor is reduced, and the forgetting to assemble the biasing member is eliminated.

  The second invention is characterized in that at least a pair of urging members are provided and arranged symmetrically with respect to the central portion of the vane in the axial direction of the output shaft.

  In the second invention, the urging member is disposed symmetrically with respect to the central portion of the vane. For this reason, the urging force acting on the vane is substantially uniform in the axial direction of the output shaft, and the vane can be uniformly brought into contact with the cam surface. As a result, it is possible to prevent the vane from coming into contact with the cam surface and causing uneven wear.

  According to a third aspect of the present invention, the biasing member is a leaf spring formed by extending in an arc shape from the vane toward the bottom of the slit so as to be convex with respect to the bottom of the slit.

  In the third invention, the biasing member is formed in an arc shape so as to be convex with respect to the bottom of the slit. For this reason, the convex curved surface of the urging member comes into contact with the bottom of the slit. As a result, it is possible to suppress the slit from being scratched or partially worn by the urging member coming into contact with the bottom of the slit.

  The fourth invention is characterized in that the vane and the urging member are an integrally molded product integrally formed of resin.

  In the fourth invention, the vane and the biasing member are integrally formed of resin. Thus, since the biasing member and the vane are easily formed integrally with the same material, the manufacturing cost of the vane motor can be reduced.

  According to a fifth aspect of the invention, the vane is made of resin, the urging member is made of metal, and the vane and the urging member are an integrally formed product integrally formed by insert molding.

  In the fifth invention, the urging member is made of metal. For this reason, the durability of the urging member is improved, and the urging force acting on the vane can be increased.

  ADVANTAGE OF THE INVENTION According to this invention, the assembly property of a vane motor can be improved.

It is sectional drawing of the vane motor which concerns on embodiment of this invention. It is a top view which shows the principal part of the vane motor in the state which removed the cover side side plate of the vane motor which concerns on embodiment of this invention. It is sectional drawing of the vane of the vane motor which concerns on embodiment of this invention. It is sectional drawing of the 1st modification of the vane of the vane motor which concerns on embodiment of this invention. It is sectional drawing of the 2nd modification of the vane of the vane motor which concerns on embodiment of this invention. It is sectional drawing of the 3rd modification of the vane of the vane motor which concerns on embodiment of this invention. It is sectional drawing of the 4th modification of the vane of the vane motor which concerns on embodiment of this invention.

  Hereinafter, a vane motor 100 according to an embodiment of the present invention will be described with reference to the drawings.

  The vane motor 100 is a hydraulic motor that converts pressure energy of a working fluid supplied from a fluid pressure supply source 50 such as a pump or an accumulator into rotational energy. As the working fluid, oil and other water-soluble alternative liquids are used.

  As shown in FIGS. 1 and 2, the vane motor 100 includes a motor body 10 having a motor housing recess 10a, a motor cover 20 that covers the motor housing recess 10a and is fixed to the motor body 10, and the motor body 10 and the motor. An output shaft 1 that is rotatably supported by the cover 20 via bearings 11, 12, a rotor 2 that is connected to the output shaft 1 and is accommodated in the motor accommodating recess 10 a, and an opening 2 b that opens on the outer peripheral surface of the rotor 2. A plurality of slits 2a formed radially in the rotor 2, vanes 3 slidably accommodated in the respective slits 2a, the rotor 2 and the vanes 3 are accommodated, and the tip portions 3a of the vanes 3 are in sliding contact with each other. A cam ring 4 having a cam surface 4a formed on the inner peripheral surface, and a leaf spring 8 as an urging member for urging the vane 3 so as to press the tip 3a of the vane 3 against the cam surface 4a. Equipped with a.

  The rotor 2 is a cylindrical member connected to the output shaft 1 by spline coupling. In the rotor 2, a plurality of slits 2a cut out in the radial direction are radially formed with a predetermined interval in the circumferential direction. In each slit 2a, the vane 3 is accommodated slidably in the radial direction.

  The vane 3 is a plate-like member having a distal end portion 3a that protrudes radially outward from the opening 2b of the slit 2a and a proximal end portion 3b that is an end opposite to the distal end portion 3a. A back pressure chamber 5 defined by a base end portion 3b of the vane 3 is formed on the bottom side of the slit 2a.

  The cam ring 4 is an annular member having a cam surface 4 a that is a substantially oval inner peripheral surface and a pin hole 4 b through which the positioning pin 7 is inserted. The tip 3a of the vane 3 protruding from the slit 2a is in sliding contact with the cam surface 4a, so that the cam ring 4 has an outer peripheral surface of the rotor 2, a cam surface 4a of the cam ring 4, and an adjacent vane 3. An oil chamber 6 is defined.

  Since the cam surface 4a of the cam ring 4 has a substantially oval shape, the length of the vane 3 protruding from the outer peripheral surface of the rotor 2 in sliding contact with the cam surface 4a as the rotor 2 rotates changes the oil chamber. The volume of 6 repeats expansion and contraction. The hydraulic oil is supplied in the supply area where the oil chamber 6 expands, and the hydraulic oil is discharged in the discharge area where the oil chamber 6 contracts.

  As shown in FIG. 2, in the vane motor 100, the vane 3 reciprocates in the first supply region and the discharge region, and reciprocates in the second supply region and the discharge region. For this reason, the oil chamber 6 expands in the first supply region, contracts in the first discharge region, expands in the second supply region, while the rotor 2 makes one rotation. It will shrink in the discharge area. The vane motor 100 has two supply areas and discharge areas, but is not limited thereto, and may have one or more supply areas and discharge areas.

  The vane motor 100 is provided on one end side of the rotor 2 in the axial direction, and is provided on the other end side in the axial direction of the rotor 2 and the annular body-side side plate 30 that abuts against one side surface of the rotor 2 and the cam ring 4. And an annular cover side plate 40 that abuts against the other side surface of the cam ring 4.

  The body side plate 30 is provided between the bottom surface of the motor housing recess 10 a and the rotor 2, and the cover side plate 40 is provided between the rotor 2 and the motor cover 20. That is, the body side plate 30 and the cover side plate 40 are arranged in a state of facing each other with the rotor 2 and the cam ring 4 interposed therebetween.

  In the motor housing recess 10a of the motor body 10, the body-side side plate 30, the cam ring 4 in which the rotor 2 and the vane 3 are housed, and the cover-side side plate 40 are housed in a stacked state. In this state, when the motor cover 20 is attached to the motor body 10, the motor housing recess 10a is sealed.

  An annular high-pressure chamber 14 defined by the motor body 10 and the body-side side plate 30 is formed on the bottom surface side of the motor housing recess 10a. The high pressure chamber 14 is connected to a fluid pressure supply source 50 provided outside the vane motor 100 through the supply passage 51. Further, two bypass passages 13 opened on the motor cover 20 side are provided on the inner peripheral surface of the motor housing recess 10 a at positions facing each other with the cam ring 4 interposed therebetween.

  On the other hand, the motor cover 20 is formed with an annular low pressure chamber 21 that communicates with the bypass passage 13 on a surface facing the motor body 10. The low pressure chamber 21 is connected to a tank 60 provided outside the vane motor 100 through the discharge passage 61.

  The body side plate 30 has a supply port 31 for supplying hydraulic oil supplied from the fluid pressure supply source 50 to the high pressure chamber 14 to the oil chamber 6, and discharges hydraulic oil in the oil chamber 6 to the low pressure chamber 21. And a recess 33 for discharging.

  The supply port 31 is an arc-shaped through hole formed through the body side plate 30 in the axial direction, and is provided at two locations corresponding to the first and second supply regions. For this reason, each oil chamber 6 communicates with the high-pressure chamber 14 through each supply port 31 according to the rotation of the rotor 2.

  The discharge recess 33 is an arc-shaped recess formed in the sliding contact surface 30a of the body side plate 30 with which the side surface of the rotor 2 is in sliding contact. The discharge recesses 33 are provided at two locations corresponding to the first and second discharge regions, respectively, and the outer peripheral ends of the discharge recesses 33 reach the outer peripheral surface of the body side plate 30 to make a detour. Connected to the passage 13. Therefore, each oil chamber 6 communicates with the low pressure chamber 21 through each discharge recess 33 and the bypass passage 13 according to the rotation of the rotor 2.

  The body-side side plate 30 has an arcuate back pressure port 34 formed on the sliding contact surface 30 a and communicating with the plurality of back pressure chambers 5, and a communication hole 38 communicating the back pressure port 34 and the high pressure chamber 14. And are provided. The hydraulic oil is guided from the high pressure chamber 14 into each back pressure chamber 5 through the back pressure port 34 and the communication hole 38. For this reason, the vane 3 is pressed so as to be pushed radially outward from the slit 2a by the pressure of the hydraulic oil guided to the back pressure chamber 5, and the tip 3a of the vane 3 is pressed against the cam surface 4a. It becomes.

  The cover side plate 40 is formed with a discharge port 41 that guides the hydraulic oil in the oil chamber 6 to the low pressure chamber 21 so as to cut out a part of the outer edge. The discharge ports 41 are provided at two locations corresponding to the first and second discharge areas, respectively. For this reason, each oil chamber 6 communicates with the low pressure chamber 21 through each discharge port 41 according to the rotation of the rotor 2.

  The vane motor 100 further includes a leaf spring 8 as a biasing member that biases the vane 3 so as to press the tip portion 3a of the vane 3 against the cam surface 4a. The leaf spring 8 is disposed in the back pressure chamber 5 in a compressed state between the bottom portion of the slit 2 a and the base end portion 3 b of the vane 3. For this reason, the vane 3 is pressed by the urging force of the leaf spring 8 so as to be pushed radially outward from the slit 2a, and the tip 3a of the vane 3 is pressed against the cam surface 4a. Since the urging force of the leaf spring 8 acts on the vane 3 even when hydraulic oil is not guided to the back pressure chamber 5, when the vane motor 100 is started, the tip portion 3a of the vane 3 and the cam The hydraulic oil is prevented from leaking into the adjacent oil chamber 6 from the gap between the surface 4a.

  Here, a specific shape of the leaf spring 8 will be described with reference to FIG. FIG. 3 is a cross-sectional view showing a cross section when the vane 3 is cut by a plane along the radial direction of the rotor 2.

  A pair of leaf springs 8 are provided for each vane 3, and are arranged symmetrically across the central portion of the vane 3 in the axial direction of the output shaft 1. Each leaf spring 8 has a coupling portion 8b coupled to the base end portion 3b of the vane 3, and a main body portion 8a extending in an arc shape from the coupling portion 8b.

  When the leaf spring 8 having such a shape is inserted into the slit 2 a together with the vane 3, a restoring force is generated by the body portion 8 a of the leaf spring 8 coming into contact with the bottom of the slit 2 a and bending. The restoring force is an urging force that acts to push the vane 3 outward from the slit 2a in the radial direction.

  Further, as shown in FIG. 3, the main body 8a is formed in an arc shape so as to be convex with respect to the bottom of the slit 2a, so that the bottom of the slit 2a has a convex curved surface of the main body 8a. A certain contact surface 8c comes into contact. For this reason, when the leaf | plate spring 8 contact | abuts to the bottom part of the slit 2a, it is suppressed that the slit 2a gets a damage | wound or uneven wear.

  The leaf spring 8 and the vane 3 are integrally formed by injection molding using a resin such as polyether ether ketone (PEEK). For this reason, only by inserting the vane 3 into the slit 2 a of the rotor 2, the leaf spring 8 can be assembled together in the rotor 2. As a result, the number of man-hours for assembling the vane motor 100 is reduced, and the assembly of the member that biases the vane 3 is not forgotten. Further, since the leaf spring 8 and the vane 3 are formed of the same material, the manufacturing cost of the vane motor 100 can be reduced.

  The leaf springs 8 are provided at both ends of the vane 3, respectively. As described above, the leaf springs 8 are arranged symmetrically with the central portion of the vane 3 interposed therebetween, so that the urging force acting on the vane 3 is substantially equal in the axial direction of the output shaft 1. Accordingly, the tip 3a of the vane 3 can be uniformly and stably abutted against the cam surface 4a, and the tip 3a of the vane 3 can be prevented from being in contact with the cam surface 4a and causing uneven wear. can do. Note that “symmetric” does not mean that the size is strictly symmetrical. For example, it is only necessary that the leaf springs 8 are arranged almost symmetrically near different ends across the central portion of the vane 3, and the leaf springs 8 are arranged almost symmetrically in this way, It is only necessary that the urging force acting on the vane 3 is substantially uniform in the axial direction of the output shaft 1. Further, the leaf springs 8 may be provided not only as a pair but also as a plurality. By providing a plurality of leaf springs 8, the urging force acting on the vane 3 can be made more uniform in the axial direction of the output shaft 1.

  Next, the operation of the vane motor 100 configured as described above will be described.

  When hydraulic oil is supplied from the fluid pressure supply source 50 to the vane motor 100, the hydraulic oil flows into the oil chamber 6 located in the first and second supply regions through the high pressure chamber 14 and the supply port 31. Of the vanes 3 that define the oil chamber 6, the vane 3 that is located closer to the first and second discharge regions has a larger area exposed from the rotor 2. It becomes the force which presses the vane 3 toward the 1st discharge | emission area | region. Similarly, the pressure of the hydraulic oil is a force that presses the vane 3 from the second supply region toward the second discharge region.

  Then, from the oil chamber 6 located in the first and second discharge regions, the hydraulic oil whose pressure has been reduced by pressing the vane 3 is guided to the low pressure chamber 21 through the discharge recess 33 and the discharge port 41, Further, it is discharged to the tank 60 through the discharge passage 61.

  In this way, the rotor 2 is rotationally driven counterclockwise as shown by the arrow in FIG. 2 together with the vane 3 pressed by the pressure of the hydraulic oil. As a result, the output shaft 1 can obtain an output and torque corresponding to the pressure and flow rate of the hydraulic oil supplied from the fluid pressure supply source 50.

  Further, part of the hydraulic oil supplied to the high pressure chamber 14 is supplied to the back pressure chamber 5 through the communication hole 38 and the back pressure port 34. Therefore, when the vane motor 100 is rotating, the vane 3 has a diameter from the slit 2 a due to the pressure of the hydraulic oil in the back pressure chamber 5 that presses the base end 3 b and the centrifugal force that works as the rotor 2 rotates. It is urged in the direction toward the outside. For this reason, since the tip 3a of the vane 3 rotates while being in sliding contact with the cam surface 4a of the cam ring 4, the hydraulic oil in the oil chamber 6 flows from between the tip 3a of the vane 3 and the cam surface 4a of the cam ring 4. Almost no leakage. As a result, the pressure of the hydraulic oil is efficiently consumed to press the vane 3, and the motor efficiency is improved.

  On the other hand, when starting the vane motor 100, naturally the centrifugal force does not act on the vane 3, and since the hydraulic oil is not supplied to the back pressure chamber 5, the vane 3 positioned particularly vertically upward is provided. Enters the slit 2a due to gravity, and a gap is formed between the tip 3a of the vane 3 and the cam surface 4a. When such a gap occurs, even if hydraulic oil is supplied to the oil chamber 6, it leaks from the gap, and as a result, the rotor 2 does not rotate and the startability of the vane motor 100 is deteriorated.

  On the other hand, the vane motor 100 of the present embodiment includes the leaf spring 8 that biases the vane 3 so as to press the tip 3a of the vane 3 against the cam surface 4a as described above. Even when the hydraulic oil is not supplied to 5, the vane 3 is pressed against the cam surface 4a. Therefore, since the driving force for rotating the rotor 2 is generated at the same time as the working oil is supplied to the oil chamber 6, the startability of the vane motor 100 is ensured.

  According to the above embodiment, there exist the effects shown below.

  In the vane motor 100, a leaf spring 8 provided in the slit 2a is formed integrally with the vane 3 in order to ensure startability. For this reason, the leaf spring 8 can be easily assembled together in the rotor 2 simply by inserting the vane 3 into the slit 2 a of the rotor 2. In this way, skill is not required in the work of assembling the vane 3 and the leaf spring 8 in the slit 2a, and the vane 3 and the leaf spring 8 are assembled in the slit 2a in the same process, not in separate processes. It is done. As a result, the man-hours for assembling the vane motor 100 are reduced, and the assembly of the vane motor 100 can be improved by not forgetting to assemble the biasing member that biases the vane 3. Moreover, the manufacturing cost of the vane motor 100 can be reduced by reducing the number of parts managed in the manufacture of the vane motor 100.

  Next, a modification of the vane 3 in which the urging member is integrated will be described with reference to FIGS. 4 to 7 are sectional views showing a section of the vane 3 as in FIG. The modifications described below are also within the scope of the present invention, and the configurations described in the modifications and the configurations described in the above-described embodiments are combined, or the configurations described in the following different modifications are combined. It is also possible.

  In the vane 3 of the first modification shown in FIG. 4, a plate spring 8 is integrally formed only at one end of the vane 3 in the axial direction of the output shaft 1. In this case, since the main body 8a of the leaf spring 8 is formed relatively long, the urging force acting on the vane 3 can be easily adjusted by changing the shape of the main body 8a. For example, the urging force acting on the vane 3 can be changed according to the amount of protrusion of the vane 3 from the rotor 2 by gradually changing the thickness and width of the main body 8a toward the coupling portion 8b.

  In addition, since the vane 3 shown in FIG. 4 has only one leaf spring 8, the shape is simplified compared to the case where a plurality of leaf springs 8 are provided like the vane 3 shown in FIG. 3. It can be formed easily. Further, since the main body 8a of the leaf spring 8 is formed in an arc shape so as to be convex with respect to the bottom of the slit 2a, the contact surface which is a convex curved surface of the main body 8a is formed on the bottom of the slit 2a. 8c comes into contact. For this reason, when the leaf | plate spring 8 contact | abuts to the bottom part of the slit 2a, it is suppressed that the slit 2a gets a damage | wound or uneven wear.

  The urging member formed integrally with the vane 3 of the second modification shown in FIG. 5 is a metal leaf spring 18. The leaf spring 18 has an embedded portion 18b embedded in the resin vane 3 and a main body portion 18a extending in an arc shape from both ends of the embedded portion 18b. The vane 3 and the leaf spring 18 are integrally formed by insert molding. In this case, since the plate spring 18 as the urging member is made of metal, the urging force is applied to the vane 3 and the durability of the urging member is improved as compared with the case where the urging member is made of resin. Can be increased.

  Further, since the main body portion 18a of the leaf spring 18 is formed in an arc shape so as to be convex with respect to the bottom portion of the slit 2a, the bottom surface of the slit 2a has a contact surface that is a convex curved surface of the main body portion 18a. 18c will come into contact. For this reason, when the leaf | plate spring 18 contact | abuts to the bottom part of the slit 2a, it is suppressed that the slit 2a gets a damage | wound or uneven wear. In addition, the main-body part 18a does not need to be provided in the both ends of the embedded part 18b, and may be provided only in the end of the embedded part 18b. Alternatively, a plurality of substantially V-shaped members in which the main body portion 18 a is provided only at one end of the embedded portion 18 b may be embedded in the vane 3.

  The urging member formed integrally with the vane 3 of the third modification shown in FIG. 6 is a metal coil spring 19. The coil spring 19 includes an embedded portion 19b embedded in the resin vane 3 and a coil-shaped main body portion 19a extending from the embedded portion 19b. The vane 3 and the coil spring 19 are integrally formed by insert molding. Also in this case, since the coil spring 19 as the urging member is made of metal, durability of the urging member is improved as compared with the case where the urging member is formed of resin, and the biasing member acting on the vane 3 is also improved. It is possible to increase the power. Further, the urging force acting on the vane 3 can be easily adjusted by changing the number of the coil springs 19 and the characteristics of the coil springs 19.

  The urging member formed integrally with the vane 3 of the fourth modification shown in FIG. 7 is a metal coil spring 19 as in the third modification. In the fourth modification, the vane 3 and the coil spring 19 are integrally formed by insert molding by embedding one end side of the coil spring 19 in the resin vane 3 over a predetermined length. In the fourth modified example, the same effect as in the third modified example is obtained, and it is not necessary to form a portion like the embedded portion 19b of the third modified example on the coil spring 19, and for example, a commercially available coil spring 19 is provided. Since it can be used as it is, the manufacturing cost of the vane motor 100 can be reduced. Further, by sufficiently securing the length in which the coil spring 19 is embedded in the vane 3, the coil spring 19 is stably disposed with respect to the vane 3, and the coil spring 19 is moved from the vane 3. It is possible to reliably prevent the escape.

  As described above, in the modified examples as shown in FIGS. 4 to 7, since the vane 3 and the biasing member are integrally formed, the vane 3 is simply inserted into the slit 2 a of the rotor 2. The biasing member is also assembled in the rotor 2 together. As a result, the man-hours for assembling the vane motor 100 are reduced, and the assembly of the vane motor 100 can be improved by not forgetting to assemble the biasing member that biases the vane 3.

  The configuration, operation, and effect of the embodiment of the present invention configured as described above will be described together.

  The vane motor 100 includes a rotor 2 that is connected to the output shaft 1 and radially formed with a plurality of slits 2 a that are open to the outer peripheral surface, a plurality of vanes 3 that are slidably received in the slits 2 a, A cam ring 4 having a cam surface 4a formed on the inner peripheral surface thereof in sliding contact with the tip 3a; and biasing members 8, 18, and 19 provided in the slit 2a for biasing the vane 3 against the cam surface 4a; , And the vane 3 and the biasing members 8, 18, and 19 are integrally formed.

  According to this configuration, the urging members 8, 18, 19 provided in the slit 2 a in order to ensure startability are formed integrally with the vane 3. For this reason, the urging members 8, 18 and 19 can be easily assembled together in the rotor 2 by simply inserting the vane 3 into the slit 2 a of the rotor 2. Thus, no skill is required in the work of assembling the vane 3 and the urging members 8, 18, and 19 in the slit 2a, and the vane 3 and the urging members 8, 18, and 19 are separate steps. Instead, they are assembled in the slit 2a in the same process. As a result, the man-hours for assembling the vane motor 100 are reduced, and the assembly of the vane motor 100 can be improved by not forgetting to assemble the biasing member that biases the vane 3. Moreover, the manufacturing cost of the vane motor 100 can be reduced by reducing the number of parts managed in the manufacture of the vane motor 100.

  The urging members 8, 18, and 19 are provided in at least a pair, and are disposed symmetrically with respect to the central portion of the vane 3 in the axial direction of the output shaft 1.

  In this configuration, each biasing member 8, 18, 19 is disposed symmetrically with respect to the central portion of the vane 3. For this reason, the urging force acting on the vane 3 is substantially uniform in the axial direction of the output shaft 1, and the tip 3a of the vane 3 can be uniformly and stably abutted against the cam surface 4a. . As a result, it is possible to prevent the tip 3a of the vane 3 from coming into contact with the cam surface 4a and causing uneven wear.

  Further, the urging members 8 and 18 are leaf springs formed to extend in an arc shape from the vane 3 toward the bottom of the slit 2a so as to be convex with respect to the bottom of the slit 2a.

  In this configuration, the urging members 8 and 18 are formed in an arc shape so as to be convex with respect to the bottom of the slit 2a. For this reason, the contact surfaces 8c and 18c which are convex curved surfaces of the main body portions 8a and 18a come into contact with the bottoms of the slits 2a. As a result, the urging members 8 and 18 abut against the bottom of the slit 2a, so that the slit 2a can be prevented from being scratched or partially worn.

  Further, the vane 3 and the biasing member 8 are integrally molded products formed integrally with resin.

  In this configuration, the vane 3 and the biasing member 8 are integrally formed of resin. Thus, since the biasing member 8 and the vane 3 are easily formed integrally with the same material, the manufacturing cost of the vane motor 100 can be reduced.

  Further, the vane 3 is made of resin, the urging members 18 and 19 are made of metal, and the vane 3 and the urging members 18 and 19 are integrally formed products formed integrally by insert molding.

  In this configuration, the urging members 18 and 19 are made of metal. For this reason, compared with the case where an urging member is formed with resin, while the durability of an urging member is improved, the urging force which acts on vane 3 can be increased.

  The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

  DESCRIPTION OF SYMBOLS 100 ... Vane motor, 1 ... Output shaft, 2 ... Rotor, 2a ... Slit, 3 ... Vane, 4 ... Cam ring, 4a ... Cam surface, 8 ... Leaf spring (Biasing member), 18 ... leaf spring (biasing member), 19 ... coil spring (biasing member), 50 ... fluid pressure supply source

Claims (5)

A vane motor that is rotationally driven by a working fluid supplied from a fluid pressure supply source,
A rotor connected to the output shaft and radially formed with a plurality of slits opening on the outer peripheral surface;
A plurality of vanes each slidably received in the slit;
A cam ring formed on the inner peripheral surface of the cam surface with which the tip of the vane is in sliding contact;
A biasing member that is provided in the slit and biases the vane against the cam surface;
The vane motor, wherein the vane and the biasing member are integrally formed.   2. The vane motor according to claim 1, wherein at least a pair of the urging members are provided and are arranged symmetrically with respect to a central portion of the vane in an axial direction of the output shaft.   2. The leaf spring formed by the urging member extending in an arc shape from the vane toward the bottom of the slit so as to be convex with respect to the bottom of the slit. 2. The vane motor according to 2.   The vane motor according to any one of claims 1 to 3, wherein the vane and the biasing member are an integrally molded product integrally formed of resin. The vane is made of resin, and the biasing member is made of metal,
The vane motor according to any one of claims 1 to 3, wherein the vane and the urging member are an integrally molded product integrally formed by insert molding.

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