Cycloid hydraulic motor with driving gear

Abstract

The utility model relates to the technical field of hydraulic driving, in particular to a cycloid hydraulic motor with a driving gear, which comprises an output shaft, a front cover, a body shell, a separation disc, a rotor and stator pair and a rear cover, and the outer side end of the output shaft is axially sleeved with an external driving gear. According to the cycloid hydraulic motor with the driving gear, the rotor profile tolerance of the rotor and stator pair forms a special hill-shaped profile, so that mechanical interference is formed in the operation process, the motor obtains large starting pressure, and the motor has an oil cut-off locking function; the two end faces of the stator pin tooth part are of a double-counter-bore pressure equalizing groove structure, an end face friction pair forms an oil film, and the friction coefficient is reduced. The outer side end of the output shaft is axially sleeved with the external driving gear with the sinking groove, the baffle internally provided with the end bolts is inserted into the sinking groove for assembly, stability is improved, and the structural layout is more reasonable.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic drive, in particular to a cycloid hydraulic motor with a driving gear. Background Art

[0002] The cycloid hydraulic motor is a small, low-speed, high-torque hydraulic motor with a single-shaft, geared stator and rotor pair. The oil entering from the oil port drives the rotor to revolve around a center point, and the rotating rotor is used to drive the output through the spline shaft. The cycloid hydraulic motor has a wide range of uses, mainly used in the rotary mechanism of various machinery such as agriculture, fishery, light industry, lifting and transportation, mining, and engineering machinery. The cycloid hydraulic motors currently on the market have limited stability in the closed type inside the rotor-stator pair cavity because they do not have a self-locking function, and because the transmission surface uses straight teeth, the end face friction of the motor during the transmission process is relatively large. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the cycloid hydraulic motor currently on the market has no self-locking function, resulting in limited stability in the closed type inside the rotor-stator sub-cavity, and because the transmission surface adopts straight tooth transmission, the end face friction of the motor during the transmission process is relatively large.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a cycloidal hydraulic motor with a driving gear, comprising an output shaft, a front cover, a body shell, a spacer, a rotor-stator pair and a rear cover, the outer end of the output shaft is axially sleeved with an external driving gear, the outer surface of the external driving gear is provided with a sinking groove with a baffle inserted inside, the baffle is penetrated by end bolts matching the output shaft, the front cover and the internal connecting end of the body shell are movably inserted with a cylindrical roller bearing for connecting the output shaft, the body shell is provided with a needle bearing for connecting the output shaft at the connecting end of the spacer, and the rotor profile in the rotor-stator pair is a hill-like structure.

[0005] A plurality of lateral limiting slots are provided on the side wall of the outer end of the output shaft, and the external driving gear is inserted into the lateral limiting slot through the inner limiting protrusion and axially sleeved with the outer end of the output shaft.

[0006] The front cover, the body shell, the partition plate, the rotor-stator pair and the rear cover are assembled and connected one by one from left to right.

[0007] The output shaft and the rotor in the rotor-stator pair are connected through a linkage shaft transmission.

[0008] A hexagon socket screw plug is threadedly assembled at the center position of the rear cover, and an embedded composite gasket is installed on the inner side surface of the hexagon socket screw plug.

[0009] Both ends of the linkage shaft are axially fixed with integrally structured linkage tooth heads. Internal transmission holes that match the linkage shaft are provided inside both the output shaft and the rotor within the stator-rotor pair. An integrally structured internal meshing tooth ring that matches the linkage tooth head is provided on the inner side surface of the internal transmission hole.

[0010] The beneficial effects of the present utility model are as follows:

[0011] (1) The rotor contour of the stator-rotor pair of the cycloidal hydraulic motor with a drive gear in the present utility model forms a special hilly contour, resulting in mechanical interference during operation, thereby enabling the motor to obtain a relatively large starting pressure and endowing the motor with a fuel cut-off locking function.

[0012] (2) Both end faces of the stator pin tooth parts adopt a double counterbore equalizing groove structure, and an oil film is formed on the end face friction pair, reducing the friction coefficient.

[0013] (3) An external drive gear with a sinking groove is axially sleeved on the outer side end of the output shaft, and assembly is carried out by inserting a baffle with an end bolt inside into the sinking groove, improving stability and making the structural layout more reasonable. Description of the Drawings

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 is a structural schematic diagram of the present utility model.

[0016] Figure 2 is an internal partial schematic diagram of the external drive gear in the present utility model.

[0017] Figure 3 is a partial schematic diagram of the position of the rotor inside the stator-rotor pair in the present utility model. Detailed Embodiment

[0018] The present utility model will now be further described in detail in conjunction with the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0019] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] Figure 1 、 Figure 2 and Figure 3The cycloid hydraulic motor with a driving gear shown in the figure comprises an output shaft 1, a front cover 2, a body shell 3, a spacer plate 4, a rotor-stator pair 5 and a rear cover 6. An external driving gear 7 is axially sleeved on the outer end of the output shaft 1. A sinking groove 9 with a baffle plate 8 inserted inside is provided on the outer surface of the external driving gear 7. An end bolt 10 matching the output shaft 1 passes through the baffle plate 8. A cylindrical roller bearing 11 for connecting to the output shaft 1 is movably inserted at the internal connecting end of the front cover 2 and the body shell 3. A needle bearing 12 for connecting to the output shaft 1 is provided inside the body shell 3 at the connecting end of the spacer plate 4. The contour of the rotor 51 in the rotor-stator pair 5 is a hill-like structure.

[0021] The rotor-stator pair 5 is composed of a stator 51 fixed to the partition plate 4 and the rear cover 6 and a rotor 52 movably assembled inside the stator 51 .

[0022] Rotor 52: Through specially processed disc rollers and special machine tool dressing parameters, the profile of rotor 52 forms a special hilly profile, so that mechanical interference is formed during its operation, so that the motor obtains a larger starting pressure, and the motor has an oil cut-off locking function;

[0023] Stator 51: The inner cavity of the stator 51 is directly broached and formed by a broach to ensure a certain processing accuracy. The aperture, position and verticality of the stator 51 have special requirements;

[0024] Assembly of the rotor-stator pair: The inner cavity of the stator 51 is expanded by heating, and the cooled rotor 52 is assembled with needle teeth, thereby increasing the inner cavity assembly interference of the rotor-stator pair 5 and forming a larger starting torque of the rotor-stator pair 5.

[0025] In order to cooperate with the axial sleeve limit, three lateral limit slots 13 are opened on the side wall of the outer end of the output shaft 1, and the external driving gear 7 is inserted into the lateral limit slot 13 through the inner limit protrusion to axially sleeve the outer end of the output shaft 1.

[0026] In order to facilitate assembly, the front cover 2, the body shell 3, the partition plate 4, the rotor-stator pair 5 and the rear cover 6 are assembled and connected one by one from left to right.

[0027] In order to cooperate with the double epicycloid parameter segmented structure design, the output shaft 1 and the rotor 52 in the rotor-stator pair 5 are connected by a linkage shaft 14 .

[0028] In order to cooperate with the lateral threaded closure seal, a hexagon socket screw plug 15 is threadedly assembled at the center position of the inner portion of the rear cover 6 , and an embedded composite gasket 16 is installed on the inner side surface of the hexagon socket screw plug 15 .

[0029] In order to cooperate with the two-end drive, integral structure linkage tooth heads 17 are axially fixed at both ends of the linkage shaft 14. Internal transmission holes matching with the linkage shaft 14 are formed inside the output shaft 1 and the rotor 52 inside the stator-rotor pair 5. Integral structure internal meshing tooth rings 18 matching with the linkage tooth heads 17 are provided on the inner side surfaces of the internal transmission holes.

[0030] Inspired by the above ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A cycloidal hydraulic motor with a drive gear, comprising an output shaft (1), a front cover (2), a body shell (3), a spacer disc (4), a stator-rotor pair (5) and a rear cover (6), characterized in that: The outer end of the output shaft (1) is axially sleeved with an external drive gear (7), and the outer surface of the external drive gear (7) is provided with a sinking groove (9) with a baffle plate (8) inserted therein, and the baffle plate (8) is penetrated by an end bolt (10) that matches the output shaft (1), and the inner connecting end of the front cover (2) and the body shell (3) is movably inserted with a cylindrical roller bearing (11) for connecting to the output shaft (1), and the body shell (3) is provided with a needle bearing (12) for connecting to the output shaft (1) at the connecting end of the partition plate (4), and the rotor (52) in the stator-rotor pair (5) has a hill-like structure as the contour.

2. The cycloidal hydraulic motor with a drive gear according to claim 1, characterized in that: A plurality of lateral limiting slots (13) are provided on the side wall of the outer end of the output shaft (1), and the external driving gear (7) is inserted into the lateral limiting slot (13) through the inner limiting protrusion to be axially sleeved with the outer end of the output shaft (1).

3. The cycloidal hydraulic motor with a drive gear according to claim 1, characterized in that: The front cover (2), the body shell (3), the partition plate (4), the rotor-stator pair (5) and the rear cover (6) are assembled and connected one by one from left to right.

4. The cycloidal hydraulic motor with a drive gear according to claim 1, characterized in that: The output shaft (1) and the rotor (52) in the rotor-stator pair (5) are transmission-connected via a linkage shaft (14).

5. The cycloidal hydraulic motor with a drive gear according to claim 1, characterized in that: A hexagon socket screw plug (15) is threadedly mounted at the center position of the interior of the rear cover (6), and an embedded composite gasket (16) is mounted on the inner side surface of the hexagon socket screw plug (15).

6. The cycloidal hydraulic motor with a drive gear according to claim 4, characterized in that: Both ends of the linkage shaft (14) are axially fixed with linkage tooth heads (17) of an integral structure, and the output shaft (1) and the rotor (52) in the rotor-stator pair (5) are provided with internal transmission holes that match the linkage shaft (14), and the inner side surface of the internal transmission hole is provided with an internal meshing tooth ring (18) of an integral structure that matches the linkage tooth head (17).

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