CN213776290U

CN213776290U - Auxiliary supporting structure of output shaft

Info

Publication number: CN213776290U
Application number: CN202023002858.1U
Authority: CN
Inventors: 王克玖; 徐正华; 秦震
Original assignee: Suzhou Jiufu Agricultural Machinery Co ltd
Current assignee: Suzhou Jiufu Agricultural Machinery Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-07-23
Anticipated expiration: 2030-12-14

Abstract

The utility model discloses an auxiliary stay structure of output shaft belongs to engine output transmission technical field. The utility model discloses an auxiliary supporting structure, which comprises a belt pulley, a bearing fixing structure, an output shaft auxiliary supporting structure and a connecting shaft sleeve; the belt pulley is fixedly arranged at one end of the connecting shaft sleeve, the connecting shaft sleeve is fixed at the end part of an output shaft of the engine, the connecting shaft sleeve is arranged in the auxiliary supporting structure of the output shaft, the connecting shaft sleeve can rotate around the central shaft of the connecting shaft sleeve, the outer wall surface of the connecting shaft sleeve is fixed in the bearing, and the auxiliary supporting structure of the output shaft is fixed on the outer wall surface of the bearing; the output shaft auxiliary support structure is fixedly arranged on the engine shell. The utility model has the advantages of reasonable design, the principle is simple, convenient to popularize and use that output shaft auxiliary stay structure passes through the fixed stay of connecting the axle sleeve realization to engine output shaft for it rotates stably, alleviates moment of flexure to engine output shaft's destruction, the utility model discloses structural design is reasonable.

Description

Auxiliary supporting structure of output shaft

Technical Field

The utility model mainly relates to an engine output transmission technical field mainly relates to an auxiliary stay structure of output shaft.

Background

The power transmission system of the small engine of the existing agricultural machinery and the output shaft structure form of the engine mainly adopt the transmission form that the output shaft is directly installed with an output belt pulley to drive a belt. For example: the Chinese patent application with the application number of CN202010788784.4 discloses a two-stage belt transmission mode for tests, which comprises a transmission shaft, wherein one end of the transmission shaft is rotatably inserted in a cylindrical supporting seat, the other end of the transmission shaft is fixedly provided with a coaxial primary belt transmission wheel, and the middle part of the transmission shaft is fixedly sleeved with a secondary belt transmission wheel; the periphery of the secondary belt transmission wheel is provided with a cover, the transmission shaft is horizontally inserted in the middle of the cover, and the cover comprises a transmission top plate and a transmission movable plate which are assembled and fixed to form a groove shape. According to the two-stage belt transmission mode for the test, two-stage transmission of a belt is realized through the transmission shaft and the two belt transmission wheels, effective transmission of torque in a large-distance position for the test or product development is guaranteed, and the problems of shaking, elongation, slipping and the like easily caused by long transmission distance and high transmission rotating speed of a single belt are solved; the device has the characteristics of simple processing and installation and easy fault treatment, and reduces the economic cost and the economic cost in the test or the product development.

However, the existing output pulley is sleeved on the output shaft, for example: chinese patent with application number CN201921004779.9 discloses a reducing gear box, including the base, set up the output shaft that is used for providing the motor of power and is used for exporting power on the base, install the action wheel on the motor shaft of motor, be connected with first polywedge bet on the action wheel, the other end of first polywedge bet is connected on the duplex band pulley, the duplex band pulley is installed at the duplex band pulley epaxially to the duplex band pulley passes through second polywedge bet and belt pulley connection, the belt pulley cover is established on the output shaft, be provided with metal insert between the inboard and output shaft of belt pulley. A loosening and harrowing machine comprises the reduction gearbox. In this way, the utility model discloses reducing gear box and pine harrow machine can improve stability, simple structure, convenient assembling, safe and reliable.

The existing belt pulley output shaft sleeving mode is limited by the structure, and especially when the length of an output shaft is short, the output belt pulley is far away, so that the output shaft is unstable in rotation and even broken.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome output shaft connection structure among the prior art and can not deal with when output shaft length is short, the condition far away in output belt pulley position, the output shaft can be rotatory unstable not enough of rupture even, provides an auxiliary support structure of output shaft, the utility model discloses engine output shaft's auxiliary support structure connects in engine housing, and the connecting axle sleeve is established in engine output shaft's auxiliary support structure to keep the stability when connecting the axle sleeve rotation, and then guarantee the rotational stability of output shaft.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses an auxiliary supporting structure of an output shaft, which comprises a belt pulley, a bearing fixing structure, an auxiliary supporting structure of the output shaft and a connecting shaft sleeve; the belt pulley is fixedly arranged at one end of the connecting shaft sleeve, the connecting shaft sleeve is fixed at the end part of an output shaft of the engine, the connecting shaft sleeve is arranged in the auxiliary supporting structure of the output shaft and can rotate around the central shaft of the connecting shaft sleeve, the outer wall surface of the connecting shaft sleeve is fixed in the bearing, and the auxiliary supporting structure of the output shaft is fixed on the outer wall surface of the bearing; namely, the connecting shaft is sleeved in the bearing inner ring of the bearing, and the bearing outer ring of the bearing is fixed in the auxiliary support structure of the output shaft; the output shaft auxiliary support structure is fixedly arranged on the engine shell. Therefore, the auxiliary support structure of the output shaft realizes the fixed support of the output shaft of the engine through the connecting shaft sleeve, so that the auxiliary support structure of the output shaft rotates stably and reliably, and the damage of the bending moment to the output shaft of the engine is relieved.

As a further improvement, the utility model discloses still include the fan, the fan is fixed to be set up on the belt pulley, and the fan is located between belt pulley and the engine housing. The fan and the belt pulley rotate synchronously to realize air cooling and heat dissipation of the engine.

As a further improvement, the engine output shaft is connected with the connecting shaft sleeve through a key. The key connection transmission is reliable.

As a further improvement of the utility model, the belt pulley comprises a rim and a spoke, and the center of the spoke is provided with a shaft hole for inserting an output shaft of the engine; the rim comprises a belt groove, and a transmission belt is arranged in the belt groove.

As a further improvement of the utility model, the belt groove is a triangular belt groove. A V-belt or a V-belt can provide a large transmission force.

As a further improvement of the utility model, the outside of connecting sleeve is provided with the step face, including first step face and second step face, seted up the ring channel on the second step face, place the axle jump ring in the ring channel. And the shaft clamp spring and the step at the junction of the first step surface and the second step surface fix the bearing inner ring from two directions.

As a further improvement of the present invention, the bearing outer ring is fixed by a first hole snap spring and a second hole snap spring, and the first hole snap spring and the second hole snap spring are respectively arranged in two annular grooves formed in the output shaft auxiliary support structure; the first hole clamp spring and the shaft clamp spring are located on the same plane. The first hole clamp spring and the second hole clamp spring are fixed on the outer ring of the bearing, and the first hole clamp spring and the shaft clamp spring are located on the same plane, so that the bearing is integrally stable.

As a further improvement, the utility model discloses a plurality of louvres of edge circumference evenly distributed on the belt pulley. Heat dissipation can be further optimized.

As a further improvement of the present invention, the fan comprises at least 2 blades, and the blades are distributed symmetrically at the center. The dynamic balance of the fan is ensured, and the rotation is more stable.

As a further improvement of the present invention, the distance from the blades of the fan to the central shaft is greater than the outer diameter of the pulley. The air current blows through from the belt pulley outside, and the flow is smooth and easy, optimizes the heat dissipation.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

the utility model discloses an auxiliary stay structure of output shaft, engine output shaft's auxiliary stay structure is connected in engine housing, belt pulley and connecting axle sleeve fixed connection, connecting axle sleeve and output shaft fixed connection, and the connecting axle sleeve sets up in engine output shaft's auxiliary stay structure simultaneously to keep the stability when connecting axle sleeve is rotatory, and then guarantee the rotational stability of output shaft, the utility model has the advantages of reasonable design, the principle is simple, convenient to popularize and use.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a schematic view of a pulley according to the present invention;

fig. 4 is a prior art schematic.

The reference numerals in the schematic drawings illustrate:

1. a belt pulley; 1-1, a rim; 1-11, belt grooves; 1-12, heat dissipation holes; 1-2, spokes; 1-21, threaded hole; 1-3, axle hole; 2. a fan; 3. a first hole clamp spring; 4. an output shaft auxiliary support structure; 5. a second hole clamp spring; 6. a bearing; 7. a shaft clamp spring; 8. connecting the shaft sleeve; 8-1, a first step surface; 8-2 and a second step surface.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The structure, proportion, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the limit conditions of the present invention, so that the present invention has no technical essence, and any structural modification, proportion relation change or size adjustment should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Fig. 4 shows a conventional output shaft transmission structure, which cannot cope with the situation that when the length of an output shaft is short, an output belt pulley is far away, the end of the output shaft lacks support, and the output shaft is unstable in rotation and even broken.

The present invention will be further described with reference to the following examples.

Example 1

Referring to fig. 1, the auxiliary support structure for an output shaft of the present embodiment includes a pulley 1, a bearing 6, a bearing fixing structure, an output shaft auxiliary support structure 4, and a connecting sleeve 8. The connecting sleeve 8 is fixed to an end of an output shaft (not shown) of the engine, and further, the connecting sleeve can be fixedly connected in a key connection mode. The connecting shaft sleeve 8 is arranged in the output shaft auxiliary supporting structure 4, and the connecting shaft sleeve 8 can rotate around the central axis of the connecting shaft sleeve 8, specifically, the outer wall surface of the connecting shaft sleeve 8 is fixed in the bearing 6, and the output shaft auxiliary supporting structure 4 is fixed on the outer wall surface of the bearing 6; that is, the connecting sleeve 8 is inserted into the bearing inner race of the bearing 6, and the bearing outer race of the bearing 6 is fixed inside the output shaft auxiliary support structure 4.

Referring to fig. 2, the output shaft auxiliary support structure 4 is fixedly disposed on the engine housing, specifically, on the outer side of the engine output shaft, and surrounds the engine output shaft. The output shaft auxiliary support structure 4 may be bolted to the engine housing, or other attachment means may be used.

Referring to fig. 1 and 2, the pulley 1 comprises a rim 1-1 and spokes 1-2, wherein a shaft hole 1-3 is formed in the center of the spokes 1-2 for inserting an output shaft of an engine; the wheel rim 1-1 comprises belt grooves 1-11, and a transmission belt is arranged in the belt grooves 1-11. According to the sectional shape of the belt, there are flat belt transmission, triangular belt transmission, circular belt transmission, and the like. The flat belt has a flat rectangular section, the surface of the belt pulley is smooth cylindrical, and when the belt works on the belt pulley, the inner surface of the belt is a working surface. The section of the V-belt is trapezoidal, and the V-belt is contacted with the pulley groove at two side surfaces, so that the side surfaces are working surfaces. The positive pressure generated by the v-belt on the working surface is greater than that of a flat belt under the same force. Therefore, the V-belt can transmit larger circumferential force under the same other conditions. The preferred belt grooves 1-11 are V-belt grooves, i.e. V-belts or V-belts are used, so that better transmission effect can be achieved.

A plurality of threaded holes are circumferentially and equidistantly formed in the spoke 1-2, 5 threaded holes 1-21 are formed in the spoke 2 and used for allowing bolts to penetrate through, and the belt pulley 1 is in threaded connection with the connecting shaft sleeve 8. Alternatively, in connection with fig. 3, 4 threaded holes 1-21 are provided.

Referring to fig. 1, the bearing 6 includes a bearing inner ring and a bearing outer ring, and a step surface, specifically, a first step surface 8-1 and a second step surface 8-2 are provided outside the connecting shaft sleeve 8, so that one side of the bearing inner ring abuts against a step at the junction of the first step surface 8-1 and the second step surface 8-2, the other side of the bearing inner ring abuts against a shaft snap spring 7, and the shaft snap spring 7 is provided in an annular groove provided in the second step surface 8-2, whereby the bearing inner ring is fixed. Similarly, the bearing outer ring is fixed through first hole jump ring 3 and second hole jump ring 5 completion, and first hole jump ring 3 and second hole jump ring 5 set up respectively in two ring channels of seting up in output shaft auxiliary stay structure 4. When the installation is completed, the first hole clamp spring 3 and the shaft clamp spring 7 should be in the same plane.

Example 2

With reference to fig. 1 and 2, the basic structure of an auxiliary support structure for an output shaft of the present embodiment is the same as that of embodiment 1, and the improvement is that:

still be provided with fan 2, fan 2 and belt pulley 1 fixed connection to, belt pulley 1 is rotatory, and it is rotatory to drive fan 2, thereby forms the air convection, can constitute the forced air cooling structure, realizes the initiative heat dissipation demand of engine during operation. A fan 2 is arranged between the pulley 1 and the engine housing.

Preferably, the blades of the fan 2 are arranged to ensure that, during operation, the wind blows from the engine side to the pulley 1 side, thereby ensuring a better heat dissipation effect.

Preferably, in order to maintain the dynamic balance of the fan 2, the fan 2 is composed of a plurality of blades with central symmetry, and the number of the blades can be 2, 3 or more.

Preferably, the fan 2 is connected with the pulley 1 by a bolt or other fixed connection method.

Referring to fig. 3, a plurality of heat dissipation holes 1-12 are uniformly distributed on the pulley 1 along the circumference, thereby enhancing the heat dissipation performance.

Preferably, the fan 2 may be arranged such that the position of the blades of the fan 2 is located outside the pulley 1, that is, the distance from the blades of the fan 2 to the central axis is greater than the outer diameter of the pulley 1, thereby also improving the heat dissipation effect.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. An auxiliary support structure of an output shaft, characterized in that: the device comprises a belt pulley, a bearing fixing structure, an output shaft auxiliary supporting structure and a connecting shaft sleeve; the belt pulley is fixedly arranged at one end of the connecting shaft sleeve, the connecting shaft sleeve is fixed at the end part of an output shaft of an engine, the connecting shaft sleeve is arranged in the auxiliary supporting structure of the output shaft and can rotate around the central shaft of the connecting shaft sleeve, the outer wall surface of the connecting shaft sleeve is fixed in the bearing, and the auxiliary supporting structure of the output shaft is fixed on the outer wall surface of the bearing; the bearing outer ring of the bearing is fixed inside the auxiliary support structure of the output shaft; the output shaft auxiliary supporting structure is fixedly arranged on the engine shell.

2. The auxiliary support structure of the output shaft according to claim 1, characterized in that: the fan is fixedly arranged on the belt pulley and is positioned between the belt pulley and the engine shell.

3. The auxiliary support structure of the output shaft according to claim 1 or 2, characterized in that: and the engine output shaft is in key connection with the connecting shaft sleeve.

4. The auxiliary support structure of the output shaft according to claim 1 or 2, characterized in that: the belt pulley comprises a rim and a spoke, and a shaft hole is formed in the center of the spoke and used for inserting the output shaft of the engine; the rim comprises a belt groove, and a transmission belt is arranged in the belt groove.

5. The auxiliary support structure of the output shaft according to claim 4, wherein: the belt groove is a triangular belt groove.

6. The auxiliary support structure of the output shaft according to claim 1 or 2, characterized in that: the outside of connecting sleeve is provided with the step face, including first step face and second step face, has seted up the ring channel on the second step face, place the axle jump ring in the ring channel.

7. The auxiliary support structure of the output shaft according to claim 6, wherein: the bearing outer ring is fixed through a first hole clamp spring and a second hole clamp spring, and the first hole clamp spring and the second hole clamp spring are respectively arranged in two annular grooves formed in the output shaft auxiliary supporting structure; the first hole clamp spring and the shaft clamp spring are located on the same plane.

8. The auxiliary support structure of the output shaft according to claim 2, characterized in that: a plurality of heat dissipation holes are uniformly distributed on the belt pulley along the circumference.

9. The auxiliary support structure of the output shaft according to claim 2, characterized in that: the fan comprises at least 2 blades, and the blades are distributed in a central symmetry mode.

10. The auxiliary support structure of the output shaft according to claim 2, characterized in that: the distance from the blades of the fan to the central shaft is greater than the outer diameter of the pulley.