Hydraulic swivel device

Abstract

The hydraulic rotating device of the present invention includes a shell, a drive seat and a stator blade; the shell has a first through hole and a second through hole; the drive seat has a rotor blade accommodated in the shell, and the stator blade is accommodated in the shell and has a first abutment surface, a second abutment surface, a first oil inlet and outlet hole located on the first abutment surface, and a second oil inlet and outlet hole located on the second abutment surface; when the hydraulic oil flows in from the first through hole and flows out from the first inlet and outlet hole, or when the hydraulic oil flows in from the second through hole and flows out from the second inlet and outlet hole, the hydraulic oil drives the rotor blade to rotate relative to the shell, so that the rotor blade abuts against the first abutment surface or the second abutment surface of the stator blade; therefore, the hydraulic rotating device of the present invention requires fewer components and has a simple structure, and is also easy to replace and repair when the components are damaged.

Description

Technical Field

[0001] The invention relates to a rotating mechanism, in particular to a hydraulic rotating device which has a simple structure and is easy to maintain. Background Art

[0002] The invention patent case CN104747365 discloses a hydraulic swing motor, which includes a housing with stator blades and rotor blades arranged in the housing. The rotor blades are driven to rotate by hydraulic oil, and the stator blades are used to limit the rotation angle of the rotor blades, so that the rotor blades rotate back and forth in the housing.

[0003] However, the hydraulic swing motor disclosed in the aforementioned patent case uses more seals to achieve a good sealing effect, but more seals will make the assembly more complicated. In addition, the housing and the stator blades are made in an integrated manner. If the reciprocating angle of the rotor blades needs to be changed, a new housing and a new stator blade need to be manufactured, resulting in increased manufacturing costs. Therefore, the hydraulic swing motor disclosed in the aforementioned patent case still has room for improvement in structure. Summary of the invention

[0004] In view of the above-mentioned deficiencies, the main purpose of the present invention is to provide a hydraulic rotating device which requires fewer components and has a simple structure, and is easy to replace and repair when the components are damaged.

[0005] In order to achieve the above-mentioned main purpose, the hydraulic rotating device of the present invention includes a shell, a drive seat and a stator blade. The shell has a bottom plate, an annular main body extending from the bottom plate, a chamber formed by the bottom plate and the annular main body, an opening penetrating the bottom plate and communicating with the chamber, and a first through hole and a second through hole penetrating the annular main body and communicating with the chamber, wherein the first and second through holes are used for hydraulic oil to flow in or out. The drive seat has a rotating shaft penetrating the opening of the shell and accommodated in the chamber, wherein the rotating shaft has a shaft portion and a rotor blade connected to the shaft portion, wherein the rotor blade has a first side surface and a second side surface opposite to the first side surface, and wherein the rotor blade can drive the shaft portion to reciprocate relative to the shell under the drive of the hydraulic oil. The stator blade is accommodated in the chamber of the shell, the stator blade has an outer peripheral surface, a first abutment surface and a second abutment surface, and the stator blade has a first flow channel and a second flow channel, the first flow channel has a first guide groove located on the outer peripheral surface and a first oil inlet and outlet hole connected with the first guide groove and located on the first abutment surface, the second flow channel has a second guide groove located on the outer peripheral surface and a second oil inlet and outlet hole connected with the second guide groove and located on the second abutment surface, the first guide groove corresponds to the first through hole of the shell, and the second guide groove corresponds to the second through hole of the shell. Among them, when the hydraulic oil flows out from the first oil inlet and outlet hole through the first through hole and the first guide groove, the hydraulic oil drives the rotor blades to drive the shaft portion to rotate to a first position relative to the shell, so that the second side surface of the rotor blade abuts against the second abutment surface of the stator blade; when the hydraulic oil flows out from the second oil inlet and outlet hole through the second through hole and the second guide groove, the hydraulic oil drives the rotor blades to drive the shaft portion to rotate to a second position relative to the shell, so that the first side surface of the rotor blade abuts against the first abutment surface of the stator blade.

[0006] According to the above technical features, the hydraulic rotating device of the present invention requires fewer components and has a simple structure. When the components are damaged, they are easy to replace and repair. Moreover, if the user wants to change the reciprocating rotation angle of the rotor blades, the hydraulic rotating device of the present invention only needs to be matched with different types of stator blades, and does not need to manufacture new housings and new stator blades like the hydraulic rotating device disclosed in the aforementioned patent case. For manufacturers, it can not only reduce manufacturing costs, but also be adjusted according to user needs.

[0007] Preferably, the first abutment surface of the stator blade has a first connecting groove connected to the first oil inlet and outlet hole and a first groove connected to the first connecting groove, and the cross-sectional area of ​​the first groove is larger than the cross-sectional area of ​​the first connecting groove; the second abutment surface has a second connecting groove connected to the second oil inlet and outlet hole and a second groove connected to the second connecting groove, and the cross-sectional area of ​​the second groove is larger than the cross-sectional area of ​​the second connecting groove.

[0008] Preferably, the first guide groove and the second guide groove of the stator blade are arranged parallel to each other and spaced apart, one end of the first guide groove has a first recessed portion, the first recessed portion corresponds to the first through hole of the shell, and one end of the second guide groove has a second recessed portion, the second recessed portion corresponds to the second through hole of the shell.

[0009] Preferably, the outer peripheral surface of the stator blade is in an arc shape, and a central angle formed by the outer peripheral surface, the first abutting surface, and the second abutting surface is 180 degrees, 240 degrees, or 270 degrees.

[0010] Preferably, the hydraulic rotating device of the present invention further comprises a cover body covering the annular main body of the housing, and the stator blades are locked in the cover body and accommodated in the chamber of the housing.

[0011] Preferably, the shaft portion of the driving seat has an engaging recess, and the rotor blade has an engaging protrusion, and the engaging protrusion is detachably inserted into the engaging recess, so that the shaft portion and the rotor blade together form the rotating shaft.

[0012] Preferably, the drive seat includes an inner sleeve ring sleeved on the rotating shaft, an outer sleeve ring sleeved on the rotating shaft and spaced apart from the inner sleeve ring, and a sealing ring accommodated between the inner sleeve ring and the outer sleeve ring, so that the shaft portion and the rotor blade can be fixed to each other more firmly.

[0013] The detailed structure, features, assembly or use of the hydraulic rotating device provided by the present invention will be described in the detailed description of the implementation method below. However, those skilled in the art should understand that the detailed description and the specific embodiments listed for implementing the present invention are only used to illustrate the present invention and are not used to limit the scope of protection of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The hydraulic rotating device provided by the present invention is further described below in conjunction with the embodiments and drawings, wherein:

[0015] Figure 1 It is a three-dimensional assembly diagram of the hydraulic rotating device according to the first embodiment of the present invention.

[0016] Figure 2 1 is a side view of a hydraulic rotating device according to a first embodiment of the present invention.

[0017] Figure 3 It is an exploded perspective view of the hydraulic rotating device according to the first embodiment of the present invention.

[0018] Figure 4 It is a rear exploded perspective view of the hydraulic rotating device according to the first embodiment of the present invention.

[0019] Figure 5 1 is an axial cross-sectional view of a hydraulic rotating device according to a first embodiment of the present invention.

[0020] Figure 6 It is a partial assembly diagram of the hydraulic rotating device according to the first embodiment of the present invention, showing that the stator blades and the rotor blades are accommodated in the cavity of the shell.

[0021] Figure 7 1 is a front view of a stator blade provided by the hydraulic rotating device according to the first embodiment of the present invention.

[0022] Figure 8 It is a left side view of the stator blade provided by the hydraulic rotating device according to the first embodiment of the present invention.

[0023] Fig. 9 It is a right side view of the stator blades provided by the hydraulic rotating device according to the first embodiment of the present invention.

[0024] Fig.10 yes Figure 2 Cross-sectional view along section line 10-10.

[0025] Fig.11 yes Figure 2 A cross-sectional view along the section line 11 - 11 shows the flow of hydraulic oil and the rotor blades are in the first position.

[0026] Fig.12 yes Figure 2 The cross-sectional view along the section line 12 - 12 shows the flow of hydraulic oil and the rotor blades are in the second position.

[0027] Fig.13 4 is a front view of a stator blade provided by a hydraulic rotating device according to a second embodiment of the present invention.

[0028] Fig.14 4 is a front view of a stator blade provided by a hydraulic rotating device according to a third embodiment of the present invention.

[0029] (Explanation of symbols)

[0030] 1: Hydraulic rotating device

[0031] 10: Shell

[0032] 11: Bottom plate

[0033] 12: Annular main body

[0034] 13: Chamber

[0035] 14: Opening

[0036] 141: Flange

[0037] 15: First through hole

[0038] 16: Second through hole

[0039] 20: Drive transposition

[0040] 21: Rotation axis

[0041] 211: front end

[0042] 22: Plate

[0043] 221: convex shaft

[0044] 222: Countersunk hole

[0045] 23: Axis

[0046] 231: Large diameter part

[0047] 232: Trail

[0048] 233: embedded card recess

[0049] 24: Rotor blades

[0050] 241: First side

[0051] 242: Second side

[0052] 243: embedded convex part

[0053] 244: Arc flange

[0054] 25: Inner ring

[0055] 26: Jacket ring

[0056] 27: Sealing ring

[0057] 30:Thrust needle roller bearing

[0058] 40: Cover

[0059] 41: Supporting part

[0060] 42: Sealing part

[0061] 43: Accommodating groove

[0062] 44: first positioning groove

[0063] 45: Keyhole

[0064] 50: stator blade

[0065] 50′: stator blade

[0066] 50″: stator blades

[0067] 51: front side

[0068] 52: Rear side

[0069] 53: Second positioning groove

[0070] 54: Countersunk hole

[0071] 55: Inner Surface

[0072] 56: Outer surface

[0073] 56′: Outer surface

[0074] 56″: Outer surface

[0075] 57: First abutment surface

[0076] 57′: first abutment surface

[0077] 57″: first abutment surface

[0078] 571: first connection slot

[0079] 572: First groove

[0080] 58: Second abutment surface

[0081] 58′: second abutment surface

[0082] 58″: Second abutment surface

[0083] 581: Second connection slot

[0084] 582: Second groove

[0085] 60: First flow channel

[0086] 61: First guide groove

[0087] 611: first recessed portion

[0088] 62: First oil inlet and outlet hole

[0089] 64: Second flow channel

[0090] 65: Second guide groove

[0091] 651: second recessed portion

[0092] 66: Second oil inlet and outlet hole

[0093] P1: First position

[0094] P2: Second position

[0095] θ: Center angle DETAILED DESCRIPTION

[0096] First of all, it should be noted that the technical features provided by the present invention are not limited to the specific structures, uses and applications described in the embodiments. The terms used in the description are all illustrative descriptive terms that can be understood by those skilled in the art. The directional descriptive terms such as "front, top, bottom, back, left, right, top, bottom, inside, and outside" mentioned in this specification are only illustrative descriptive terms based on the normal use direction, and are not intended to limit the scope of the claims.

[0097] refer to Figures 1 to 4 The hydraulic rotating device 1 of the first embodiment of the present invention includes a housing 10 , a driving seat 20 , a thrust needle bearing 30 , a cover 40 and a stator blade 50 .

[0098] like Figure 3 and Figure 4 As shown, the shell 10 has a base plate 11, an annular main body 12 extending from the base plate 11, a chamber 13 formed by the base plate 11 and the annular main body 12, an opening 14 passing through the base plate 11 and communicating with the chamber 13, a flange 141 surrounding the opening 14, and a first through hole 15 and a second through hole 16 passing through the annular main body 12 and communicating with the chamber 13.

[0099] like Figure 3 and Figure 4 As shown, the drive seat 20 has a rotating shaft 21 and a disk portion 22. The rotating shaft 21 includes a shaft portion 23 extending from the center of the disk portion 22 and a rotor blade 24. The shaft portion 23 has a large diameter portion 231, a small diameter portion 232 connected to the large diameter portion 231, and an engaging recess 233 located between the large diameter portion 231 and the small diameter portion 232. The rotor blade 24 has a first side surface 241, a second side surface 242 opposite to the first side surface 241, and an engaging protrusion 243 located between the first side surface 241 and the second side surface 242. The front end of the engaging protrusion 243 has an arc-shaped flange 244. The disk portion 22 has a convex shaft 221 and four countersunk holes 222 arranged at equal intervals around the convex shaft 221. As shown Figure 5As shown, the shaft portion 23 of the drive seat 20 is inserted into the opening 14 of the housing 10 and accommodated in the chamber 13, and the locking protrusion 243 of the rotor blade 24 is inserted into the locking recess 233 of the shaft portion 23, so that the shaft portion 23 and the rotor blade 24 together form the rotating shaft 21, and the rotating shaft 21 has a front end portion 211 formed by the arc-shaped flange 244 and the small diameter portion 232. However, the present invention is not limited to this embodiment, and the shaft portion 23 and the rotor blade 24 can also be formed in an integral manner to form the rotating shaft 21. Figures 3 to 6 As shown, the drive seat 20 also includes an inner ring 25, an outer ring 26 and a sealing ring 27. The inner ring 25 is sleeved on the front end portion 211 of the rotating shaft 21, the outer ring 26 is sleeved on the front end portion 211 of the rotating shaft 21 and is spaced apart from the inner ring 25, and the sealing ring 27 is accommodated between the inner ring 25 and the outer ring 26, thereby, the shaft 23 and the rotor blade 24 can be more firmly fixed to each other.

[0100] In this embodiment, the thrust needle bearing 30 is sleeved on the flange 141 of the housing 10 and abuts between the bottom plate 11 of the housing 10 and the disk portion 22 of the drive seat 20 (eg, Figure 5 As shown), it is used to bear the axial load of the rotating shaft 21. Since the thrust needle roller bearing 30 is a commonly used component in the art, it will not be described in detail here.

[0101] refer to Figure 3 and Figure 4 The cover body 40 has a supporting portion 41 and a sealing portion 42 extending from the supporting portion 41. The sealing portion 42 has a receiving groove 43 in the center, a first positioning groove 44 located on one side of the receiving groove 43, and two locking holes 45 located on both sides of the first positioning groove 44 respectively.

[0102] like Figure 3 , Figure 4 as well as Figure 7 As shown, the stator blade 50 has a front side surface 51 and a rear side surface 52, a second positioning groove 53 located in the center of the front side surface 51, and two countersunk holes 54 respectively penetrating the front side surface 51 and the rear side surface 52 and respectively located on both sides of the second positioning groove 53. Figure 7 As shown, the stator blade 50 also has an arc-shaped inner peripheral surface 55 and an arc-shaped outer peripheral surface 56, and a first abutting surface 57 and a second abutting surface 58 located between the inner peripheral surface 55 and the outer peripheral surface 56. In this embodiment, the central angle θ formed by the outer peripheral surface 56, the first abutting surface 57 and the second abutting surface 58 is 180 degrees. Figure 8 The stator blade 50 further includes a first flow channel 60 and a second flow channel 64. The first flow channel 60 has a first guide groove 61 and a first oil inlet and outlet hole 62. The first guide groove 61 is located on the outer peripheral surface 56 and has a first recessed portion 611. The first oil inlet and outlet hole 62 is connected to the first guide groove 61 and is located on the first abutting surface 57 (such as Fig. 9 The second flow channel 64 has a second guide groove 65 and a second oil inlet and outlet hole 66. The second guide groove 65 is located on the outer peripheral surface 56 and is arranged parallel to and spaced apart from the first guide groove 61. The second guide groove 65 has a second recessed portion 651. The second oil inlet and outlet hole 66 is connected to the second guide groove 65 and is located on the second abutting surface 58 (as shown in FIG. Fig. 9 Further, refer to Fig. 9 The first abutting surface 57 has a first connecting groove 571 and a first groove 572. The first connecting groove 571 is in communication with the first oil inlet and outlet hole 62. The first groove 572 is connected to the first connecting groove 571, and the cross-sectional area of ​​the first groove 572 is larger than the cross-sectional area of ​​the first connecting groove 571. The second abutting surface 58 has a second connecting groove 581 and a second groove 582. The second connecting groove 581 is in communication with the second oil inlet and outlet hole 66. The second groove 582 is connected to the second connecting groove 581, and the cross-sectional area of ​​the second groove 582 is larger than the cross-sectional area of ​​the second connecting groove 581.

[0103] During actual assembly, insert the positioning pin (not shown) into the Figure 4 The first positioning groove 44 of the cover body 40 is shown, and the Figure 3 The second positioning groove 53 of the stator blade 50 shown corresponds to the positioning pin, so that the front side 51 of the stator blade 50 is against the sealing portion 42 of the cover 40 to position the stator blade 50, and then two countersunk screws (not shown) are locked in the countersunk hole 54 of the stator blade 50 and the locking hole 45 of the cover 40 to lock the stator blade 50 to the cover 40 (as shown in FIG. Fig.10 Next, refer to Fig.10 On the one hand, the cover body 40 is fitted into the chamber 13 of the housing 10 with the sealing portion 42, so that the stator blade 50 is accommodated in the chamber 13 of the housing 10, and on the other hand, the supporting portion 41 is supported on the front end edge of the annular main body 12 of the housing 10, so that the cover body 40 is tightly covered on the annular main body 12 of the housing 10, and the front end portion 211 of the rotating shaft 21, the inner ring 25, the outer ring 26 and the sealing ring 27 are all accommodated in the accommodating groove 43 of the cover body 40 (as shown in FIG. Figure 5 As a result, reference Figure 6 The inner circumferential surface 55 of the stator blade 50 abuts against the shaft portion 23, and the first abutting surface 57 abuts against the first side surface 241 of the rotor blade 24, the outer circumferential surface 56 of the stator blade 50 abuts against the wall surface of the chamber 13 of the housing 10, and the first recessed portion 611 of the first guide groove 61 of the stator blade 50 corresponds to the first through hole 15 (such as Fig.11 As shown), the second recessed portion 651 of the second guide groove 65 of the stator blade 50 corresponds to the second through hole 16 of the housing 10 (as shown Fig.12 shown).

[0104] The above is an introduction to the components of the hydraulic rotating device 1 according to the first embodiment of the present invention. The following will further introduce the usage and function of the hydraulic rotating device 1 according to the first embodiment of the present invention.

[0105] In actual operation, the hydraulic rotating device 1 of the first embodiment of the present invention is externally connected to a hydraulic system (not shown), and the hydraulic system alternately delivers hydraulic oil to the first through hole 15 and the second through hole 16 of the housing 10. Fig.11 When the hydraulic oil flows in from the first through hole 15 of the housing 10, it flows to the first guide groove 61 under the guidance of the first recessed portion 611 of the stator blade 50 and flows out from the first oil inlet and outlet hole 62. Finally, the hydraulic oil flows from the first connecting groove 571 and the first groove 572 to the chamber 13 of the housing 10. Since the cross-sectional area of ​​the first groove 572 is larger than the cross-sectional area of ​​the first connecting groove 571, the hydraulic oil can drive the rotor blade 24 with greater force, so that the rotor blade 24 drives the shaft 23 to move relative to the housing 10 toward Fig.11 The rotor blade 24 is rotated 180 degrees in the clockwise direction to the first position P1, so that the second side surface 242 of the rotor blade 24 abuts against the second abutting surface 58 of the stator blade 50. At the same time, the hydraulic oil will flow into Fig. 9 The second oil inlet and outlet holes 66 of the stator blade 50 are shown and flow to Figure 8 The second guide groove 65 shown in FIG. Figure 8 The second recessed portion 651 shown in FIG. Figure 3 The second through-opening 16 of the housing 10 is shown to be discharged.

[0106] refer to Fig.12 When the hydraulic oil flows in from the second through hole 16 of the housing 10, it flows to the second guide groove 65 under the guidance of the second recessed portion 651 of the stator blade 50 and flows out from the second oil inlet and outlet hole 66. Finally, the hydraulic oil flows from the second connecting groove 581 and the second groove 582 into the chamber 13 of the housing 10. Since the cross-sectional area of ​​the second groove 582 is larger than the cross-sectional area of ​​the second connecting groove 581, the hydraulic oil can drive the rotor blade 24 with a greater force, so that the rotor blade 24 drives the shaft 23 to move relative to the housing 10 toward Fig.12 The rotor blade 24 rotates counterclockwise to the second position P2, so that the first side surface 241 of the rotor blade 24 abuts against the first abutting surface 57 of the stator blade 50. At the same time, the hydraulic oil flows into Fig. 9 The first oil inlet and outlet holes 62 of the stator blade 50 shown in FIG. Figure 8 The first guide groove 61 shown in FIG. Figure 8 Under the guidance of the first recessed portion 611 shown in FIG. Figure 3As shown, the hydraulic oil flows into the first through hole 15 and the second through hole 16 alternately, so that the rotor blade 24 can be driven by the hydraulic oil to drive the shaft 23 to reciprocate between the first position P1 and the second position P2 relative to the housing 10.

[0107] However, the present invention is not limited to this embodiment. Fig.13 The stator blade 50' provided in the second embodiment of the present invention has a central angle θ between its outer peripheral surface 56', the first abutment surface 57' and the second abutment surface 58' of 240 degrees, that is, the rotor blade 24 can reciprocate 120 degrees in the chamber 13 of the housing 10 under the restriction of the stator blade 50'. Fig.14 The stator blade 50″ provided in the third embodiment of the present invention has a central angle θ of 270 degrees between its outer peripheral surface 56″, the first abutment surface 57″ and the second abutment surface 58″, that is, the rotor blade 24 can reciprocate 90 degrees in the chamber 13 of the casing 10 under the restriction of the stator blade 50″.

[0108] It should be supplemented here that the hydraulic rotating device 1 of the present invention can be installed according to the needs of the user. For example, the hydraulic rotating device 1 of the present invention is installed on a workpiece chuck (not shown) so that the workpiece chuck can flip back and forth when clamping the workpiece to increase the processing efficiency, or the hydraulic rotating device 1 of the present invention is installed on a work platform (not shown) so that it can swing back and forth, or the hydraulic rotating device 1 of the present invention is installed on a chuck (not shown) that clamps an air nozzle (not shown) so that the chuck can swing back and forth when clamping the air nozzle to increase the processing efficiency.

[0109] In summary, the hydraulic rotating device 1 of the present invention requires fewer components and has a simple structure. When the components are damaged, they are easy to replace and repair. Moreover, if the user wants to change the reciprocating angle of the rotor blades 24, the hydraulic rotating device 1 of the present invention only needs to be matched with different types of stator blades 50, 50', 50", and does not need to manufacture a new housing 10 and new stator blades 50, 50', 50" as the hydraulic swing motor disclosed in the aforementioned patent case. For manufacturers, it can not only reduce manufacturing costs, but also be adjusted according to user needs.

Claims

1. A hydraulic rotating device, comprising: A housing having a bottom plate, an annular main body extending from the bottom plate, a chamber formed by the bottom plate and the annular main body, an opening penetrating the bottom plate and communicating with the chamber, and a first through hole and a second through hole penetrating the annular main body and communicating with the chamber, wherein the first through hole and the second through hole are used for hydraulic oil to flow in or out; A drive seat, having a rotating shaft penetrating the opening of the housing and accommodated in the chamber, the rotating shaft having a shaft portion and a rotor blade connected to the shaft portion, the rotor blade having a first side surface and a second side surface opposite to the first side surface, and the rotor blade can drive the shaft portion to reciprocate relative to the housing under the drive of the hydraulic oil; as well as A stator blade is accommodated in the chamber of the shell, the stator blade has an outer peripheral surface, a first abutment surface and a second abutment surface, and the stator blade has a first flow channel and a second flow channel, the first flow channel has a first guide groove located on the outer peripheral surface and a first oil inlet and outlet hole connected to the first guide groove and located on the first abutment surface, the second flow channel has a second guide groove located on the outer peripheral surface and a second oil inlet and outlet hole connected to the second guide groove and located on the second abutment surface, the first guide groove corresponds to the first through hole of the shell, and the second guide groove corresponds to the second through hole of the shell, When the hydraulic oil flows out of the first oil inlet and outlet hole through the first through hole and the first guide groove, the hydraulic oil drives the rotor blade to drive the shaft portion to rotate to a first position relative to the housing, so that the second side surface of the rotor blade abuts against the second abutting surface of the stator blade; When the hydraulic oil flows out from the second oil inlet and outlet hole through the second through hole and the second guide groove, the hydraulic oil drives the rotor blade to drive the shaft to rotate to a second position relative to the housing, so that the first side surface of the rotor blade abuts against the first abutment surface of the stator blade.

2. The hydraulic rotating device according to claim 1, characterized in that: The first abutment surface of the stator blade has a first connecting groove connected to the first oil inlet and outlet hole and a first groove connected to the first connecting groove, and the cross-sectional area of ​​the first groove is larger than the cross-sectional area of ​​the first connecting groove. The second abutment surface has a second connecting groove connected to the second oil inlet and outlet hole and a second groove connected to the second connecting groove, and the cross-sectional area of ​​the second groove is larger than the cross-sectional area of ​​the second connecting groove.

3. The hydraulic rotating device according to claim 1, characterized in that: The first guide groove and the second guide groove of the stator blade are arranged parallel to each other and spaced apart. One end of the first guide groove has a first recessed portion, and the first recessed portion corresponds to the first through hole of the shell. One end of the second guide groove has a second recessed portion, and the second recessed portion corresponds to the second through hole of the shell.

4. The hydraulic rotating device according to claim 1, characterized in that: The outer circumferential surface of the stator blade is in an arc shape, and a central angle formed by the outer circumferential surface, the first abutting surface, and the second abutting surface is 180 degrees, 240 degrees, or 270 degrees.

5. The hydraulic rotating device according to claim 1, characterized in that: The hydraulic rotating device further comprises a cover body which covers the annular main body of the housing, and the stator blades are locked in the cover body and accommodated in the chamber of the housing.

6. The hydraulic rotating device according to claim 1, characterized in that: The shaft portion of the driving seat has an engaging recess, and the rotor blade has an engaging protrusion. The engaging protrusion is detachably inserted into the engaging recess, so that the shaft portion and the rotor blade together form the rotating shaft.

7. The hydraulic rotating device according to claim 1 or 6, characterized in that: The driving seat further includes an inner ring sleeved on the rotating shaft, an outer ring sleeved on the rotating shaft and spaced apart from the inner ring, and a sealing ring accommodated between the inner ring and the outer ring.

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