CN217519169U

CN217519169U - Output gear connecting mechanism of pneumatic starting motor

Info

Publication number: CN217519169U
Application number: CN202221473793.5U
Authority: CN
Inventors: 张诗吟; 张重洋; 许铮浩; 张文豪
Original assignee: Yilian Industry Wuxi Co ltd
Current assignee: Yilian Industry Wuxi Co ltd
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2022-09-30
Anticipated expiration: 2032-06-13

Abstract

The utility model relates to a gas starting motor technical field especially relates to a gas starting motor output gear coupling mechanism, including integral key shaft and driving spindle, the hole has been seted up on driving spindle's the rear end terminal surface, and the front end is connected with output gear, the endotheca has the ratchet in the hole, the front end of integral key shaft passes the ratchet and stretches into in the hole and support on the internal perisporium of hole through the bearing, one side and the integral key shaft looks butt of bearing, and opposite side and endotheca spring holder looks butt in the hole, install the spring in the spring holder, the spring is followed axial elasticity roof pressure and is located between the diapire of spring holder and hole, the bearing is worn to locate by the front end of integral key shaft, it is relative to extend to the diapire interval with the hole in spring holder and the spring. Utilize the elasticity of spring to compress tightly the spring holder with bearing and integral key shaft along the axial and come spacingly, no longer need during the installation through the mode installation of pre-installation then screwing up the bolt, also need not fixed spline axle position during the dismantlement and dismantle, structural strength is better, and easy dismounting.

Description

Pneumatic starting motor output gear connecting mechanism

Technical Field

The utility model relates to a gas starting motor technical field especially relates to a gas starting motor output gear coupling mechanism.

Background

The gas-starting motor is one of the starting modes for the internal combustion engine, and in recent years, along with the development of the propulsion technology of diesel engines and ships, the high-power turbine gas-starting motor with high reliability and high efficiency is also in urgent need.

The output gear connecting mechanism of the pneumatic starting motor plays an extremely important role in the working process of the pneumatic motor, and is responsible for receiving power and torque from the power mechanism and transmitting the power and the torque to the final output end, namely the output gear. In the high-speed operation of the motor, if the output gear connecting mechanism has problems, the product is directly damaged, the starting motor and the diesel engine are possibly damaged, and meanwhile, broken teeth splash also has great potential safety hazards. Therefore, the good yield strength and impact resistance of the output gear connecting mechanism of the air-starting motor are very important for the whole air-starting motor.

The structure of the output gear connecting mechanism of the existing pneumatic starting motor is shown in fig. 1, and a spline shaft 01 transmits the rotation power from a power assembly to a driving main shaft 02 through a ratchet 8, and is transmitted to an output gear 9 arranged on the output end of the driving main shaft 02 by the driving main shaft 02.

On one hand, when the existing gas-started motor output gear connecting mechanism is installed, the hexagon socket head cap screws 03, the oil retaining cups 04 and the bearings 6 are required to be placed in the inner holes of the driving main shafts 02 in advance, then the ratchet 8 is arranged, then the spline shaft 01 is arranged in the inner holes of the driving main shafts 02, and finally the oil retaining cups 04 and the bearings 6 are required to be fixed by screwing the hexagon socket head cap screws 03 on the spline shaft 01 from the threaded holes at the front ends of the driving main shafts 02 under the condition that the spline shaft 01 is fixed. The assembly process is complex and long in time consumption, and the actual internal situation cannot be observed due to the fact that the oil blocking cup 04 and the bearing 6 are arranged in the shading inner hole, so that the situation that the assembly cannot be carried out exists. During the dismantlement, because integral key shaft 01 can't all throw off with drive spindle 02 and power assembly, need all take apart the complete machine, use the fixed integral key shaft 01 position of frock, just can dismantle hexagon socket head cap screw 03 on the integral key shaft 01 to pull down output gear coupling mechanism, the process is complicated, and is consuming time long.

On the other hand, the existing output gear connecting mechanism of the air-starting motor is insufficient in impact strength and easy to damage under heavy load. The existing output gear connecting mechanism of the air starting motor needs to screw a socket head cap screw 03 from the inside, so that a hole is formed in the front end of a driving main shaft 02 and communicated with an inner hole of the driving main shaft 02 for extending into a socket head cap wrench, and the output gear 9 needs to be axially fixed, so that the hole is made into a threaded hole to limit the output gear 9 by using a hexagon head bolt 05 and a flat washer 7. However, the driving spindle 02 does not avoid the threaded hole for heat treatment, and the internal thread of the threaded hole generates stress concentration; if heat treatment is carried out while avoiding the position of the threaded hole, the radial part of the external spline on the front end of the driving main shaft 02, which is in fit connection with the inner hole of the output gear 9, has uneven hardness, so that the yield strength and the impact resistance of the driving main shaft 02 are insufficient during working, and the driving main shaft is easily broken from the radial surface where the external spline and the threaded hole are located under a large impact load.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a better and easy dismounting's of structural strength gas starting motor output gear coupling mechanism to overcome prior art's above-mentioned defect.

In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a gas start motor output gear coupling mechanism, including integral key shaft and driving spindle, the hole has been seted up on driving spindle's the rear end terminal surface, and the front end is connected with output gear, the endotheca has the ratchet in the hole, the front end of integral key shaft passes the ratchet and stretches into in the hole and support on the internal perisporium of hole through the bearing, one side and the integral key shaft looks butt of bearing, and opposite side and the spring holder looks butt of endotheca in the hole, install the spring in the spring holder, the spring is along axial elasticity roof pressure between the diapire of spring holder and hole, the front end of integral key shaft is worn to locate the bearing, in spring holder and the spring and extend to and relative with the diapire interval of hole.

Preferably, the outer peripheral face of the spline shaft is provided with a clamping surface opposite to the bottom wall of the inner hole, the inner ring on one side of the bearing is abutted against the clamping surface, and the outer ring on the other side of the bearing is abutted against the spring seat.

Preferably, the spline shaft is provided with a spline shaft large-diameter section with a larger diameter and a spline shaft small-diameter section with a smaller diameter, and a clamping surface is formed between the spline shaft large-diameter section and the spline shaft small-diameter section.

Preferably, the front end of the drive spindle is a solid shaft section.

Preferably, the front end of the driving main shaft is provided with a nut, a butterfly-shaped anti-loose washer and a flat washer in sequence from front to back on the front side of the output gear to axially limit the output gear.

Compared with the prior art, the utility model discloses the progress that has showing:

the utility model changes the bearing limit structure in the existing gas starting motor output gear connecting mechanism, removes the oil retaining cup and the hexagon socket head cap screw, increases the spring seat and the spring, and utilizes the elasticity of the spring to compress the spring seat, the bearing and the spline shaft axially for limiting, so that the bearing can not generate the position forward because the spline shaft and the driving main shaft generate the axial relative displacement; simultaneously, the front end of the spline shaft is extended to extend into the spring and be close to the bottom wall of the inner hole of the driving main shaft, so that the motion guide of the bearing is realized when the spline shaft and the driving main shaft generate axial relative displacement, and the bearing cannot fall off due to the failure of the spring seat and the spring. The utility model discloses a gas starting motor output gear coupling no longer need install through the mode of pre-installation then tightening bolt during the installation, also need not fixed spline axle position during the dismantlement and dismantle, under the condition that does not change former product size, simplified the assembly operation to make structural strength obtain bigger promotion, the dismouting of complete machine is also more convenient.

Drawings

Fig. 1 is a schematic sectional view of an output gear connecting mechanism of a conventional air-actuated motor.

Fig. 2 is a schematic sectional structure diagram of an output gear connecting mechanism of a pneumatic starting motor according to an embodiment of the present invention.

Wherein the reference numerals are as follows:

01 spline shaft

02 drive spindle

03 socket head cap screw

04 oil retaining cup

05 hexagon head bolt

1 spline shaft

2 drive spindle

2a inner hole

3 spring seat

4 spring

5 nut

6 bearing

7 flat washer

8 ratchet wheel

9 output gear

10 butterfly-shaped anti-loose washer

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings. These embodiments are provided only for illustrating the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; 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 according to specific situations by those skilled in the art.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 2, the present invention discloses an embodiment of a pneumatic starter motor output gear connection.

The gas starting motor output gear connecting mechanism of this embodiment includes integral key shaft 1 and drive spindle 2, has seted up hole 2a on the rear end terminal surface of drive spindle 2, and the front end of drive spindle 2 is connected with output gear 9 for output power of rotating to output gear 9. The inner hole 2a of the driving main shaft 2 is internally sleeved with a ratchet wheel 8, and the front end of the spline shaft 1 penetrates through the ratchet wheel 8 to extend into the inner hole 2a and is supported on the inner peripheral wall of the inner hole 2a through a bearing 6. The spline shaft 1 is connected with the driving main shaft 2 in a matching mode through the ratchet wheel 8, the rear end of the spline shaft 1 is driven by rotation power to rotate, and the received rotation power is transmitted to the driving main shaft 2 through the ratchet wheel 8. When the spline shaft 1 rotates in the forward direction (the design direction), the ratchet wheel 8 is in a meshed state, the rotation power of the spline shaft 1 is transmitted to the driving main shaft 2 through the ratchet wheel 8 and is output to the output gear 9 through the driving main shaft 2, and the output of the forward rotation power is realized; when the driving main shaft 2 rotates reversely, the ratchet wheel 8 is in a disengagement state under the driving of the driving main shaft 2 rotating reversely, the power transmission between the spline shaft 1 and the driving main shaft 2 is failed, and the function of cutting off the reverse transmission chain is realized.

In this embodiment, one side of the bearing 6 abuts against the spline shaft 1, the other side of the bearing 6 abuts against the spring seat 3, the spring seat 3 is sleeved in the inner hole 2a of the driving main shaft 2, the spring 4 is installed in the spring seat 3, the spring 4 elastically pushes against the bottom wall of the spring seat 3 and the bottom wall of the inner hole 2a along the axial direction, the spring seat 3, the bearing 6 and the spline shaft 1 are pressed along the axial direction by the elastic force of the spring 4, and the axial limit of the bearing 6 is realized. The front end of the spline shaft 1 is arranged in the bearing 6, the spring seat 3 and the spring 4 in a penetrating way and extends to the position opposite to the bottom wall of the inner hole 2a, and a radial gap is reserved between the spline shaft 1 and the spring seat 3 as well as between the spline shaft 1 and the spring 4.

The gas starting motor output gear connecting mechanism of the embodiment changes a bearing limiting structure in the existing gas starting motor output gear connecting mechanism, removes an oil retaining cup and an inner hexagonal socket head screw, increases the spring seat 3 and the spring 4, and utilizes the elasticity of the spring 4 to press the spring seat 3, the bearing 6 and the spline shaft 1 axially to limit, so that the bearing 6 cannot move forwards due to the axial relative displacement between the spline shaft 1 and the driving main shaft 2; simultaneously, the front end of the spline shaft 1 is extended to extend into the spring 4 and close to the bottom wall of the inner hole 2a of the driving main shaft 2, so that the movement guide of the bearing 6 is realized when the spline shaft 1 and the driving main shaft 2 are in axial relative displacement, and the bearing 6 cannot fall off due to the failure of the spring seat 3 and the spring 4. The mode installation of bolt is then screwed up through the pre-installation no longer need be passed through to the gas starting motor output gear coupling mechanism of this embodiment when installing, also need not fixed integral key shaft 1 position during the dismantlement and dismantle, under the condition that does not change former product size, has simplified assembly operation to make structural strength obtain more promoting, the dismouting of complete machine is also more convenient.

In this embodiment, preferably, the outer peripheral surface of the spline shaft 1 is provided with a snap surface facing the bottom wall of the inner hole 2a of the drive spindle 2, the inner ring of one side of the bearing 6 abuts against the snap surface, and the outer ring of the other side of the bearing 6 abuts against the spring seat 3. Preferably, the spline shaft 1 has a spline major diameter section with a larger diameter and a spline shaft minor diameter section with a smaller diameter, the spline shaft major diameter section is connected with the spline shaft minor diameter section, and the spline shaft major diameter section is connected with the driving spindle 2 through the ratchet wheel 8, the spline shaft minor diameter section is the front end of the spline shaft 1, the end face of the spline shaft minor diameter section is opposite to the bottom wall interval of the inner hole 2a of the driving spindle 2, and a clamping surface abutted against one side of the bearing 6 is formed between the spline shaft major diameter section and the spline shaft minor diameter section.

In this embodiment, because the change of bearing limit structure, no longer need screw up the socket head cap screw from inside of driving main shaft 2, also no longer need be in order to communicate the hole 2a of driving main shaft 2 at the front end trompil of driving main shaft 2, consequently, the hole 2a of driving main shaft 2 is the blind hole in this embodiment. Preferably, the front end of the driving main shaft 2 connected with the output gear 9 is a solid shaft section, so that the adjustment of a stress relief structure is realized, and the yield strength, the toughness index and the impact resistance of the driving main shaft 2 are greatly improved.

In order to ensure reasonable structure, in this embodiment, the hexagonal head bolt for limiting the axial position of the output gear 9 in the existing output gear connecting mechanism of the air-start motor is changed into a limiting structure of the nut 5 and the butterfly-shaped lock washer 10, specifically, the nut 5, the butterfly-shaped lock washer 10 and the flat washer 7 are sequentially arranged on the front end of the driving spindle 2 from front to back on the front side of the output gear 9 to axially limit the output gear 9.

Meanwhile, the output gear connecting mechanism of the pneumatic starting motor of the embodiment optimizes the process and materials of the driving spindle 2, so that the structure strength is higher, and the pneumatic starting motor can bear larger load and impact.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a pneumatic starting motor output gear coupling mechanism, includes integral key shaft (1) and driving spindle (2), hole (2a) have been seted up on the rear end terminal surface of driving spindle (2), and the front end is connected with output gear (9), the endotheca has ratchet (8) in hole (2a), the front end of integral key shaft (1) passes ratchet (8) stretch into in hole (2a) and support through bearing (6) on the internal perisporium of hole (2a), its characterized in that, one side of bearing (6) with integral key shaft (1) looks butt, and the opposite side with endotheca in spring holder (3) looks butt in hole (2a), install spring (4) in spring holder (3), spring (4) along axial elasticity top in between hole (3) and the diapire of hole (2a), the front end of the spline shaft (1) penetrates through the bearing (6), the spring seat (3) and the spring (4) and extends to be opposite to the bottom wall of the inner hole (2a) at intervals.

2. The output gear connecting mechanism of the air-starting motor according to claim 1, wherein the outer peripheral surface of the spline shaft (1) is provided with a clamping surface opposite to the bottom wall of the inner hole (2a), the inner ring of one side of the bearing (6) is abutted against the clamping surface, and the outer ring of the other side is abutted against the spring seat (3).

3. The air-actuated motor output gear connection according to claim 2, wherein the spline shaft (1) has a larger-diameter spline shaft large-diameter section and a smaller-diameter spline shaft small-diameter section, the spline shaft large-diameter section and the spline shaft small-diameter section forming the snap-fit surface therebetween.

4. The air-actuated motor output gear coupling mechanism according to claim 1, wherein the front end of the drive spindle (2) is a solid shaft section.

5. The output gear connecting mechanism of the air-starting motor as claimed in claim 4, characterized in that the front end of the driving spindle (2) is provided with a nut (5), a butterfly-shaped anti-loose washer (10) and a flat washer (7) in sequence from front to back on the front side of the output gear (9) to axially limit the output gear (9).