CN213743554U

CN213743554U - Transmission mechanism and engine

Info

Publication number: CN213743554U
Application number: CN202022312115.8U
Authority: CN
Inventors: 于健; 陈广茂; 辛喜玲; 马高强; 李森
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-07-20
Anticipated expiration: 2030-10-16

Abstract

The utility model belongs to the technical field of the car, a drive mechanism and engine are disclosed. The transmission mechanism comprises a machine body; a gear disposed at an outer side of the body; the spline housing is positioned inside the gear and connected with the gear; the spline shaft penetrates through the spline housing and is in transmission connection with the inner wall of the spline housing through a spline structure; the first bushing is arranged in the side wall of the machine body; the camshaft penetrates through the machine body and penetrates through the first lining, and the end part of the camshaft is connected with the spline shaft; the fixed shaft is connected to the machine body, penetrates through the gear and is located between the gear and the spline housing, and the gear can rotate relative to the fixed shaft. This drive mechanism gear realizes drive and transmission through spline structure between gear and the camshaft, and spline structure only transmits the moment of torsion, and radial power on the gear does not transmit on the camshaft, reduces the radial power on the first bush of cover on locating the camshaft to guarantee the reliability of first bush.

Description

Transmission mechanism and engine

Technical Field

The utility model relates to the technical field of automobiles, especially, relate to a drive mechanism and engine.

Background

As shown in fig. 1, the conventional transmission mechanism includes a camshaft 100, a bushing 200, a flat key 300, a pressing plate 400, a bolt 500, and a gear 600, the camshaft 100 extends into a gear chamber 800 after passing through a machine body 700, the flat key 300 is disposed between the camshaft 100 and the gear 600, the pressing plate 400 abuts against the end surface of the gear 600 and the end surface of the camshaft 100, so that the gear 600 and the end surface of the camshaft 100 are flush, and the bolt 500 is respectively inserted into the pressing plate 400 and the camshaft 100, thereby ensuring the fixing effect between the camshaft 100 and the gear 600.

In the conventional structure, the gear 600 mounted on the camshaft 100 is a cantilever beam structure, and the bearing capacity of the camshaft 100 is large, so that the bushing 200 disposed between the camshaft 100 and the machine body 700 has a locking risk, and particularly when the camshaft 100 drives the accessory, the locking risk is greater.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a drive mechanism and engine reduce the bearing capacity of camshaft, guarantee to set up the reliability of bush between camshaft and organism.

To achieve the purpose, the utility model adopts the following technical proposal:

a transmission mechanism comprising:

the device comprises a machine body, wherein a first lining is arranged in the side wall of the machine body;

a gear provided outside the body;

a spline housing located inside and connected to the gear;

the spline shaft penetrates through the spline housing and is in transmission connection with the inner wall of the spline housing through a spline structure;

a first bushing disposed in a sidewall of the housing;

the camshaft penetrates through the machine body and penetrates through the first bushing, and the end part of the camshaft is connected with the spline shaft;

the fixed shaft is connected to the machine body, penetrates through the gear and is located between the gear and the spline housing, and the gear can rotate relative to the fixed shaft.

Preferably, the transmission mechanism further includes a second bushing, the fixed shaft is inserted into the second bushing, and the second bushing is disposed between the gear and the fixed shaft.

Preferably, the gear and the second bushing are in an interference fit.

Preferably, the second bushing and the fixed shaft are in clearance fit.

Preferably, the gear spline housing further comprises a connecting piece, a first connecting hole is formed in the gear, a second connecting hole is formed in the spline housing along the axial direction of the spline housing, and the connecting piece penetrates through the first connecting hole and the second connecting hole respectively.

Preferably, the camshaft further comprises a fixing piece, wherein a first fixing hole is formed in the spline shaft, a second fixing hole is formed in the camshaft corresponding to the first fixing hole, and the fixing piece is arranged in the first fixing hole and the second fixing hole in a penetrating mode respectively.

Preferably, the transmission mechanism further comprises a positioning element, a first positioning hole is formed in the spline shaft, a second positioning hole is formed in the camshaft corresponding to the first positioning hole, and the positioning element penetrates through the first positioning hole and the second positioning hole respectively.

Preferably, a limiting groove is formed in the end portion of the cam shaft, a limiting lug is convexly arranged on one side, close to the cam shaft, of the spline shaft, and the limiting lug is arranged in the limiting groove.

Preferably, the gear box further comprises a gear chamber, the gear chamber is arranged on the outer side of the machine body, and the gear chamber is used for accommodating the gear.

In order to achieve the purpose, the utility model also provides an engine, including foretell drive mechanism.

The utility model has the advantages that:

the utility model provides a transmission mechanism is located inside the gear through the spline housing and is connected in the gear, along with the rotation of gear, the gear can drive the rotation of spline housing, and the integral key shaft passes through spline structure transmission and connects in the inner wall of spline housing for the spline housing can drive the integral key shaft and rotate, and integral key shaft connection in the tip of camshaft, realizes that the integral key shaft drives camshaft pivoted function. Because realize drive and transmission through the spline structure between gear and the camshaft, the spline structure only transmits the moment of torsion, and radial power on the gear does not transmit on the camshaft, reduces the radial power on the first bush of cover on locating the camshaft to guarantee the reliability of first bush. The fixed shaft penetrates through the gear and is located between the gear and the spline housing, the gear can rotate relative to the fixed shaft, and the fixed shaft plays a role in bearing the gear, so that auxiliary support is provided for the gear.

The utility model also provides an engine, including foretell drive mechanism, can reduce the bearing capacity of camshaft to avoid camshaft bearing capacity too big and take place to embrace the axle trouble.

Drawings

FIG. 1 is a schematic diagram of a prior art transmission;

fig. 2 is a schematic structural diagram of the transmission mechanism of the present invention.

In the figure:

100. a camshaft; 200. a bushing; 300. a flat bond; 400. pressing a plate; 500. a bolt; 600. a gear; 700. a body; 800. a gear chamber;

1. a body; 2. a gear; 3. a spline housing; 4. a spline shaft; 5. a first bushing; 6. a camshaft; 7. a gear chamber; 8. a positioning member; 9. a fixing member; 10. a connecting member; 11. a fixed shaft; 12. a second bushing;

41. a limiting bump; 61. a limiting groove.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The embodiment provides a transmission mechanism, and is suitable for the technical field of engines. As shown in fig. 2, the transmission mechanism includes a machine body 1, a gear 2, a spline housing 3, a spline shaft 4, a first bushing 5, a cam shaft 6 and a gear chamber 7, the machine body 1 plays a role of integral support, the gear chamber 7 is arranged outside the machine body 1, and the gear chamber 7 is used for accommodating the gear 2. Be provided with first bush 5 in the lateral wall of organism 1, camshaft 6 passes in organism 1 and wears to locate first bush 5, and first bush 5 sets up between organism 1 and camshaft 6, and first bush 5 plays the effect of protection camshaft 6. Connect in spline shaft 4 at camshaft 6's tip, spline shaft 4 wears to locate spline housing 3, and spline shaft 4 passes through spline structure transmission to be connected in spline housing 3's inner wall, and spline housing 3 is located inside gear 2 and is connected in gear 2.

The drive mechanism that this embodiment provided is located 2 inside gears and is connected in gear 2 through spline housing 3, along with gear 2's rotation, gear 2 can drive spline housing 3's rotation, integral key shaft 4 passes through spline structure transmission and connects in spline housing 3's inner wall for spline housing 3 can drive integral key shaft 4 and rotate, and integral key shaft 4 connects in camshaft 6's tip, realizes integral key shaft 4 and drives camshaft 6 pivoted function. Because realize drive and transmission through the spline structure between gear 2 and the camshaft 6, the spline structure only transmits the moment of torsion, and radial force on the gear 2 does not transmit to the camshaft 6, reduces the radial force on the first bush 5 of cover locating on the camshaft 6 to guarantee the reliability of first bush 5.

In the process that the gear 2 drives the spline housing 3 to rotate, the spline housing 3 plays a part of bearing of the gear 2, and in order to further ensure the reliability of the rotation of the gear 2, optionally, the transmission mechanism further comprises a fixed shaft 11, the fixed shaft 11 is fixedly connected to the machine body 1 or the gear chamber 7, the fixed shaft 11 penetrates through the gear 2 and is positioned between the gear 2 and the spline housing 3, the gear 2 can rotate relative to the fixed shaft 11, the fixed shaft 11 plays a role in bearing the gear 2, and equivalently, the gear 2 is supported in an auxiliary mode.

In the process that the gear 2 rotates around the fixed shaft 11, the gear 2 is easy to wear, and in order to solve the problem, the transmission mechanism further comprises a second lining 12, the fixed shaft 11 penetrates through the second lining 12, the second lining 12 is arranged between the gear 2 and the fixed shaft 11, and the second lining 12 prevents the fixed shaft 11 from being worn, so that the fixed shaft 11 is protected.

Specifically, interference fit between gear 2 and second bush 12, clearance fit between second bush 12 and the fixed axle 11 for gear 2, second bush 12 and spline housing 3 can rotate around fixed axle 11 after having assembled, compact structure, need not occupy extra space, and can increase substantially the reliability.

In order to ensure the installation stability between the spline shaft 4 and the camshaft 6, optionally, a limiting groove 61 is provided at the end of the camshaft 6, a limiting projection 41 is convexly provided at one side of the spline shaft 4 close to the camshaft 6, and the limiting projection 41 is disposed in the limiting groove 61. The spline shaft 4 and the cam shaft 6 are limited by the mutual matching of the limiting groove 61 and the limiting lug 41.

Further, drive mechanism still includes setting element 8, and setting element 8 specifically is the locating pin, is provided with first locating hole on integral key shaft 4, is provided with the second locating hole corresponding to first locating hole on camshaft 6, and setting element 8 wears to locate first locating hole and second locating hole respectively. The positioning between the cam shaft 6 and the spline shaft 4 is carried out through the positioning piece 8, and the positioning accuracy of the cam shaft 6 and the spline shaft 4 during initial installation is guaranteed.

After the positioning part 8 is used for positioning between the camshaft 6 and the spline shaft 4, the camshaft 6 and the spline shaft 4 need to be fixed, for this reason, the transmission mechanism further comprises a fixing part 9, the fixing part 9 is a fixing bolt, a first fixing hole is arranged on the spline shaft 4 along the axial direction of the spline shaft, the first fixing hole is of a through hole structure, a second fixing hole is arranged on the camshaft 6 along the axial direction of the camshaft and corresponding to the first fixing hole, and the fixing part 9 is respectively arranged in the first fixing hole and the second fixing hole in a penetrating mode. Fix a position through mounting 9 between camshaft 6 and the integral key shaft 4, guarantee camshaft 6 and integral key shaft 4's fixed effect, guarantee overall structure's installation stability. Meanwhile, the bolt connection mode is adopted, so that the installation and the disassembly are convenient, and the maintenance is convenient.

Because integral key shaft 4 passes through spline structure transmission and connects in spline housing 3, optionally, be provided with the external splines on integral key shaft 4's outer wall, correspond the external splines at spline housing 3's inner wall and be provided with the internal spline, external splines joint in the internal spline forms spline structure, and torque transmission is effectual.

In order to guarantee the installation stabilizing member between the spline housing 3 and the gear 2, the transmission mechanism further comprises a connecting member 10, the connecting member 10 is specifically a connecting bolt, a first connecting hole is formed in the gear 2, a second connecting hole is formed in the spline housing 3 along the axial direction of the spline housing, and the connecting member 10 penetrates through the first connecting hole and the second connecting hole respectively. The spline housing 3 and the gear 2 are installed through the connecting piece 10, the fixing effect of the spline housing 3 and the gear 2 is guaranteed, and the installation stability of the whole structure is guaranteed. Meanwhile, the bolt connection mode is adopted, so that the installation and the disassembly are convenient, and the maintenance is convenient.

The embodiment also provides an engine, which comprises the transmission mechanism, and the bearing capacity of the camshaft 6 can be reduced, so that the occurrence of shaft holding faults due to overlarge bearing capacity of the camshaft is avoided.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A transmission mechanism comprises a machine body (1), wherein a first bushing (5) is arranged in the side wall of the machine body (1), and the transmission mechanism is characterized by further comprising:

a gear (2) provided outside the machine body (1);

a spline housing (3) located inside the gear wheel (2) and connected to the gear wheel (2);

the spline shaft (4) is arranged in the spline housing (3) in a penetrating mode, and the spline shaft (4) is in transmission connection with the inner wall of the spline housing (3) through a spline structure;

a camshaft (6) that passes through the machine body (1) and is inserted into the first bushing (5), wherein the end of the camshaft (6) is connected to the spline shaft (4);

the fixed shaft (11) is connected to the machine body (1), the fixed shaft (11) penetrates through the gear (2) and is located between the gear (2) and the spline housing (3), and the gear (2) can rotate relative to the fixed shaft (11).

2. The transmission mechanism according to claim 1, characterized in that it further comprises a second bushing (12), said fixed shaft (11) being pierced in said second bushing (12), said second bushing (12) being arranged between said gear wheel (2) and said fixed shaft (11).

3. Transmission according to claim 2, characterized in that there is an interference fit between the gear wheel (2) and the second bushing (12).

4. Transmission according to claim 2, characterized in that there is a clearance fit between the second bushing (12) and the fixed shaft (11).

5. Transmission according to claim 1, characterized in that it further comprises a connecting piece (10), a first connecting hole is provided on the gear (2), a second connecting hole is provided in the spline housing (3) along its axial direction, and the connecting piece (10) is respectively inserted through the first connecting hole and the second connecting hole.

6. The transmission mechanism according to claim 1, further comprising a fixing member (9), wherein a first fixing hole is provided on the spline shaft (4), a second fixing hole is provided on the camshaft (6) corresponding to the first fixing hole, and the fixing member (9) is respectively inserted into the first fixing hole and the second fixing hole.

7. The transmission mechanism according to claim 1, further comprising a positioning member (8), wherein a first positioning hole is formed on the spline shaft (4), a second positioning hole is formed on the cam shaft (6) corresponding to the first positioning hole, and the positioning member (8) is respectively inserted into the first positioning hole and the second positioning hole.

8. The transmission mechanism according to claim 1, wherein a limiting groove (61) is provided at the end of the camshaft (6), a limiting lug (41) is protruded at one side of the spline shaft (4) close to the camshaft (6), and the limiting lug (41) is disposed in the limiting groove (61).

9. The transmission mechanism according to claim 1, characterized by further comprising a gear chamber (7), said gear chamber (7) being arranged outside said machine body (1), said gear chamber (7) being adapted to accommodate said gear wheel (2).

10. An engine comprising a transmission according to any one of claims 1 to 9.