CN218757708U

CN218757708U - Rotary motor assembly of miniature excavator

Info

Publication number: CN218757708U
Application number: CN202223213205.7U
Authority: CN
Inventors: 田辉; 陆祖东; 沙肃君
Original assignee: Ningbo Yinzhou Chuangxin Construction Machinery Co ltd
Current assignee: Ningbo Yinzhou Chuangxin Construction Machinery Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-03-28
Anticipated expiration: 2032-11-30

Abstract

The utility model provides a rotary motor component of a mini excavator, which comprises a rotary motor, wherein a driving gear is connected on an output shaft of the rotary motor, one end of the shell of the rotary motor, which is close to the driving gear, is connected with a mounting seat, the mounting seat is close to an accommodating groove which is concavely formed at one end of the rotary motor and is used for accommodating the driving gear, and an avoiding hole communicated with the accommodating groove is formed on the outer wall of the mounting seat, so that the outer edge of a gear ring on the rotary seat of the excavator can stretch into the avoiding hole and is meshed with the driving gear; the end of the driving gear, which is far away from the rotary motor, is provided with a positioning shaft, the bottom of the accommodating groove is provided with a positioning bearing, and the positioning shaft is rotatably assembled in an inner hole of the positioning bearing. The utility model provides a rotary motor subassembly of miniature excavator, the elimination of maximize or the radial atress that reduces the motor, the stability of drive ring gear motion is guaranteed to extension rotary motor's life.

Description

Rotary motor assembly of miniature excavator

Technical Field

The utility model belongs to the technical field of miniature machine of digging and specifically relates to a swing motor subassembly of miniature excavator.

Background

With the change of application scenes, mini-excavators with the characteristics of flexibility, multiple functions, wide application and the like are used more and more. Through continuous exploration and tests, the conventional mini excavator adopts a combined mode of an external meshing rotary gear ring and a cycloid motor gear to realize the frame rotary operation of the mini excavator, and as the gear meshed with the rotary gear ring is directly arranged on an output shaft of the cycloid motor, the cycloid motor bears overlarge radial pressure along with the increase of the service time, the shaft seal of the cycloid motor is seriously worn, the oil leakage condition of the motor is more and more, and the service life of the rotary motor is greatly reduced; in addition, the meshing clearance between the gear of the rotary motor and the rotary gear ring is larger and larger, so that the meshing driving force is unstable, and the stability of rotary motion is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem, in order to overcome at least one defect among the prior art, provide a rotary motor subassembly of miniature excavator, the removal of maximize or reduce the radial atress of motor, prolong cycloid motor's life guarantees the stability of drive ring gear motion.

The utility model provides a rotary motor component of a mini excavator, which comprises a rotary motor, wherein a driving gear is connected on an output shaft of the rotary motor, one end of the rotary motor, which is close to the driving gear, on a shell of the rotary motor is connected with a mounting seat, the mounting seat is close to an inner concave part at one end of the rotary motor to form a containing groove for containing the driving gear, and an avoiding hole communicated with the containing groove is arranged on the outer wall of the mounting seat, so that the outer edge of a gear ring on the rotary seat of the excavator can stretch into the avoiding hole and is meshed with the driving gear; the drive gear is kept away from rotary motor's one end is provided with the location axle, the bottom of storage tank is equipped with the location bearing, the location axle rotates the assembly and is in the hole of location bearing.

The utility model discloses a miniature excavator's swing motor subassembly compares with prior art and has following advantage:

in the rotary motor assembly of the present invention, a mounting seat is connected to the casing of the rotary motor, and a storage tank is provided on the mounting seat, so that the driving gear on the rotary motor is accommodated in the storage tank, and a corresponding avoiding hole is provided on the outer wall of the storage tank, for ensuring that the outer edge of the gear ring can pass through the avoiding hole and then be engaged with the driving gear, that is, the rotation of the gear ring is driven by the operation of the rotary motor, so as to drive the rotary seat of the excavator to rotate, and realize the left and right swinging of the excavator swing arm mechanism; more importantly, the bottom of the containing groove is provided with the positioning bearing, the corresponding end of the driving gear, which is far away from the rotary motor, is provided with the positioning shaft, and the positioning shaft is rotatably assembled in the positioning bearing, so that the radial limit of the end of the driving gear, which is far away from the rotary motor, is realized, the deflection is not easy to occur in the movement process, and the stability of the meshing drive with the gear ring is ensured; and the radial stress of the rotary motor can be eliminated or reduced to the maximum extent, and the service life of the rotary motor is prolonged.

As an improvement, the bottom of the containing groove is provided with a concave installing groove, the positioning bearing is assembled in the mounting groove. In the above-mentioned improvement structure, set up the mounting groove of being exclusively used in the installation bearing at the holding tank bottom, realize that the axial of bearing is spacing, stable in structure to guarantee the nimble and stable rotation of location axle.

And the middle part of the mounting groove is provided with a communicating hole, one end of the positioning shaft, which is far away from the rotary motor, penetrates through the positioning bearing and then extends into the communicating hole, an oil seal is assembled in the communicating hole, and an inner hole of the oil seal is matched with the outer wall of the positioning shaft in a rotating and sealing way. In the improved structure, the communication hole effectively increases the assembling area of the positioning shaft, and has better structural stability, namely the rotation limit of the driving gear is more stable; in addition, the setting of oil blanket can effectively prevent bearing lubricating oil and lubricated gear's lubricating grease from leaking, and the normal lubrication of better assurance bearing and gear promotes life.

In a further improvement, one end of the mounting seat, which is close to the rotary motor, is provided with a mounting flange, and the mounting flange is provided with a mounting hole for connecting with a main frame of the excavator; and a connecting flange connected with the mounting flange is arranged on the shell of the rotary motor. In the improved structure, the mounting flange is arranged on the mounting seat, so that the mounting seat and the rotary motor can be connected and fixed more conveniently, the corresponding connecting flange is also arranged on the rotary motor shell, and the mounting seat and the rotary motor can be assembled and disassembled conveniently by connecting the connecting flange and the mounting flange.

And the mounting flange is provided with at least one positioning pin shaft matched with a positioning hole preset on the excavator main frame. In the above-mentioned improvement structure, the location of mounting hole position has been realized in the setting of locating pin axle on the mounting flange, guarantees that the mounting hole position is accurate with the connecting hole counterpoint on the excavator body frame, and easy to assemble improves the installation effectiveness.

The mounting flange is symmetrically provided with two mounting lugs, and each mounting lug is provided with two mounting holes; and each mounting lug is provided with a connecting hole at the middle position of the two mounting holes, and the positioning pin shaft is assembled in each connecting hole. In the improved structure, the mounting holes which are symmetrically arranged increase the strength of the mounting structure; in addition, the two mounting lugs are respectively provided with a connecting hole for mounting a positioning pin shaft, namely when the mounting flange and the excavator main frame are mounted, the mounting flange is firstly positioned through the two positioning pin shafts, and then the four mounting holes are mounted, so that the accuracy of the mounting positions is better ensured; thereby ensuring that the clearance tolerance of the meshing of the rotary gear and the gear ring is within the required range.

And in the improvement, the mounting flange is provided with a convex limiting plate, and the limiting plate is provided with a limiting notch used for being assembled with a preset limiting part on the excavator main frame. Among the above-mentioned improvement structure, the setting up of spacing breach makes the mount pad have good limiting displacement after installing with the excavator body frame, makes it also be difficult for taking place circumference deflection under the torsion effect that receives drive gear to guarantee excavator slewing motion's stationarity.

Drawings

Fig. 1 is a schematic structural view of a swing motor assembly of a mini excavator according to the present invention;

fig. 2 is an exploded schematic view of the swing motor assembly of the mini excavator according to the present invention.

(without rotary motor)

Description of reference numerals:

1. a rotary motor; 2. a drive gear; 3. a mounting base; 4. a containing groove; 5. avoiding holes; 6. positioning the shaft; 7. positioning the bearing; 8. mounting grooves; 9. a communicating hole; 10. oil sealing; 11. installing a flange; 12. mounting holes; 13. mounting a lug; 14. connecting holes; 15. a limiting plate; 16. a limiting notch; 17. assembling holes; 18. a keyway.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, the utility model provides a rotary motor assembly of a mini excavator, which comprises a rotary motor 1, specifically, the rotary motor 1 is a cycloid motor, and a driving gear 2 is connected on the output shaft of the rotary motor 1; in addition, one end of the shell of the rotary motor 1, which is close to the driving gear 2, is connected with an installation seat 3, one end of the installation seat 3, which is close to the rotary motor 1, is recessed inwards to form an accommodating groove 4 for accommodating the driving gear 2, and in the structure, a certain gap is reserved between the inner wall of the accommodating groove 4 and the outer wall of the driving gear 2 for filling lubricating grease; and, set up on the outer wall of mount pad 3 and the storage tank 4 intercommunication dodge hole 5 to can make the ring gear outer fringe on the excavator revolving bed can stretch into dodge hole 5 and mesh with drive gear 2, realize driving the ring gear rotation through the operation of swing motor 1 promptly, ring gear and revolving bed fixed connection in the excavator structure, revolving bed and excavator body frame are along the rotatable connection of level, thereby drive the revolving bed rotation of excavator through eating disconnected rotation, finally realize excavator swing arm mechanism's horizontal hunting.

In the above structure, more specifically, as shown in fig. 2, a positioning shaft 6 is integrally formed in the middle of one end of the driving gear 2 away from the rotary motor 1, in addition, a positioning bearing 7 is arranged at the bottom of the accommodating groove 4, the positioning shaft 6 is rotatably assembled in an inner hole of the positioning bearing 7, and the positioning shaft 6 is radially limited by the positioning bearing 7, so that the driving gear 2 does not deflect in the axial direction in the transmission process of the driving gear 2 driven by the rotary motor 1, that is, the radial stress of the rotary motor 1 is maximally eliminated or reduced, and the service life of the rotary motor 1 is prolonged; meanwhile, the driving gear 2 is stable and does not deflect, and the stability of meshing driving with the gear ring is better guaranteed. In the structure, one end of the driving gear 2 is provided with a fitting hole 17, and the inner wall of the fitting hole 17 is provided with a key groove 18 extending along the axial direction of the fitting hole, specifically, the fitting hole 17 is used for inserting and matching the output shaft of the rotary motor 1, and the limit fixation is realized through a flat key. The other end of the drive gear 2 is formed with the positioning shaft 6.

In this embodiment, in order to realize the stable connection of the positioning bearing 7, a mounting groove 8 is concavely arranged at the bottom of the accommodating groove 4, the positioning bearing 7 is assembled in the mounting groove 8, that is, the outer ring of the positioning bearing 7 is tightly assembled in the mounting groove 8, and the connecting shaft is tightly assembled in the inner ring of the positioning bearing 7. In addition, in order to better realize the stable assembly of the positioning shaft 6, a communication hole 9 is formed in the middle of the mounting groove 8, one end, far away from the rotary motor 1, of the positioning shaft 6 penetrates through the positioning bearing 7 and then extends into the communication hole 9, an oil seal 10 is assembled in the communication hole 9, and an inner hole of the oil seal 10 is matched with the outer wall of the positioning shaft 6 in a rotating and sealing mode.

On the other hand, in the embodiment, an installation flange 11 is arranged at one end of the installation seat 3 close to the rotary motor 1, and an installation hole 12 for connecting with the excavator main frame is arranged on the installation flange 11; a connecting flange connected to the mounting flange 11 is provided on the casing of the rotary motor 1. The mounting base 3 and the rotary motor 1 can be conveniently disassembled and assembled through the connection of the connecting flange and the mounting flange 11. In this structure, mount pad 3 and mounting flange 11 are integral casting structure to carry out further precision machining at mounting flange 11's terminal surface, likewise, flange's terminal surface needs to carry out machining according to the design requirement, with flange's accurate assembly in order to guarantee.

On the other hand, the mounting flange 11 is provided with at least one positioning pin shaft matched with a positioning hole preset on the excavator main frame, so that the position of the mounting hole 12 is accurately aligned with the connecting hole 14 on the excavator main frame, the mounting is convenient, and the mounting efficiency is improved.

Preferably, two mounting lugs 13 are symmetrically arranged on the mounting flange 11 of the embodiment, and two mounting holes 12 are respectively formed in each mounting lug 13; connecting holes 14 are formed in the middle of the two mounting holes 12 on each mounting lug 13, and positioning pin shafts are assembled in the connecting holes 14. In addition, the connecting flange is of an oval structure, two end parts of the long edge of the connecting flange of the oval structure are connected with the mounting flange 11 along an angle perpendicular to the two mounting lugs 13, and the interference between connecting fasteners is avoided in the mode of staggered connection. Moreover, the two mounting lugs 13 of the mounting flange 11 are provided with corresponding positioning sales, so that the accuracy of the connecting position of the mounting hole 12 can be better ensured.

In addition, in this embodiment, a protruding limiting plate 15 is arranged on the mounting flange 11, and a limiting notch 16 used for being assembled with a limiting component preset on the excavator main frame is formed in the limiting plate 15. The arrangement of the limiting notch 16 enables the mounting seat 3 and the excavator main frame to have a good limiting effect after being mounted, so that the mounting seat is not easy to deflect circumferentially under the torque action of the driving gear 2, and the stability of the excavator rotary motion is guaranteed.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present disclosure.

Claims

1. The utility model provides a swing motor subassembly of miniature excavator, it includes swing motor (1), be connected with drive gear (2) on the output shaft of swing motor (1), its characterized in that: one end, close to the driving gear (2), of a shell of the rotary motor (1) is connected with a mounting seat (3), one end, close to the rotary motor (1), of the mounting seat (3) is concave to form a containing groove (4) for containing the driving gear (2), and an avoiding hole (5) communicated with the containing groove (4) is formed in the outer wall of the mounting seat (3), so that the outer edge of a gear ring on the rotary seat of the excavator can extend into the avoiding hole (5) and is meshed with the driving gear (2); the drive gear (2) is kept away from one end of the rotary motor (1) is provided with a positioning shaft (6), the bottom of the accommodating groove (4) is provided with a positioning bearing (7), and the positioning shaft (6) is rotatably assembled in an inner hole of the positioning bearing (7).

2. The swing motor assembly of the mini-excavator according to claim 1, wherein: the bottom of the accommodating groove (4) is provided with an installing groove (8) in a concave manner, and the positioning bearing (7) is assembled in the installing groove (8).

3. The swing motor assembly of the mini-excavator according to claim 2, wherein: intercommunicating pore (9) have been seted up at the middle part of mounting groove (8), location axle (6) are kept away from the one end of rotary motor (1) is passed extend to behind location bearing (7) in intercommunicating pore (9), just join in marriage in intercommunicating pore (9) and be equipped with oil blanket (10), the hole of oil blanket (10) with location axle (6) outer wall rotates and sealed cooperation.

4. The swing motor assembly of a mini-excavator according to any one of claims 1 to 3, wherein: a mounting flange (11) is arranged at one end, close to the rotary motor (1), of the mounting seat (3), and a mounting hole (12) used for being connected with a main frame of an excavator is formed in the mounting flange (11); and a connecting flange connected with the mounting flange (11) is arranged on the shell of the rotary motor (1).

5. The swing motor assembly of the mini-excavator according to claim 4, wherein: and at least one positioning pin shaft matched with a positioning hole preset on the excavator main frame is arranged on the mounting flange (11).

6. The swing motor assembly of the mini-excavator according to claim 5, wherein: two mounting lugs (13) are symmetrically arranged on the mounting flange (11), and two mounting holes (12) are formed in each mounting lug (13); each mounting lug (13) is positioned in the middle of the two mounting holes (12) and is provided with a connecting hole (14), and the positioning pin shaft is assembled in each connecting hole (14).

7. The swing motor assembly of the mini-excavator according to claim 5, wherein: the mounting flange (11) is provided with a convex limiting plate (15), and the limiting plate (15) is provided with a limiting notch (16) used for being assembled with a limiting part preset on the excavator main frame.