Powder metallurgy crankshaft timing gear

Abstract

The utility model relates to the technical field of gear transmission, and discloses a powder metallurgy crankshaft timing gear which comprises a gear shaft outer frame and a gear transmission mechanism, the inner wall of the gear shaft outer frame is sleeved with a gear column, the outer wall of the gear column is fixedly connected with an upper transmission gear shaft, the outer wall of the gear column is fixedly connected with a first limiting ring, and the outer wall of the gear column is fixedly connected with a second limiting ring. A second limiting ring is fixedly connected to the outer wall of the tooth column, a lower transmission gear shaft is fixedly connected to the side, away from the upper transmission gear shaft, of the tooth column, tooth grooves are formed in the outer wall of the lower transmission gear shaft, and the tooth grooves are distributed in the outer wall of the lower transmission gear shaft in a circumferential array mode. According to the powder metallurgy crankshaft timing gear, the first connecting ring and the second connecting ring are symmetrically arranged on the inner wall of the lining body, so that when equipment works, the first limiting ring and the second limiting ring can be limited, the situation that the first limiting ring and the second limiting ring are polished in the equipment can be effectively avoided, and noise generated when the equipment works can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gear transmission, in particular to a powder metallurgy crankshaft timing gear. Background Art

[0002] The crankshaft timing gear is a set of precision gears used to control the timing ignition of the engine. However, the timing gear is prone to generate noise and vibration due to the meshing between gears during operation, which seriously does not meet the requirements of modern people for vehicle environment. Most of the crankshaft timing gears on the market currently achieve the purpose of reducing noise by changing the rack material, which not only consumes production costs, but also complicates the processing process and cannot achieve quantitative production. Therefore, this technical solution proposes a powder metallurgy crankshaft timing gear. Utility Model Content

[0003] The utility model provides the following technical solution: a powder metallurgy crankshaft timing gear, comprising a gear shaft outer frame and a gear transmission mechanism, the inner wall of the gear shaft outer frame is sleeved with a tooth column, the outer wall of the tooth column is fixedly connected to an upper transmission gear shaft, the outer wall of the tooth column is fixedly connected to a first limiting ring, the outer wall of the tooth column is fixedly connected to a second limiting ring, the tooth column is fixedly connected to a lower transmission gear shaft on a side away from the upper transmission gear shaft, the outer wall of the lower transmission gear shaft is provided with tooth grooves, and the tooth grooves are distributed in a circular array on the outer wall of the lower transmission gear shaft.

[0004] As a preferred technical solution of the utility model, the outer wall of the gear shaft outer frame is fixedly connected with a protective top block, the outer wall of the gear shaft outer frame is provided with an external fixing groove, and the inner wall of the gear shaft outer frame is provided with a mounting bushing.

[0005] As a preferred technical solution of the utility model, the inner wall of the gear shaft outer frame is sleeved with a bushing body, the inner wall of the bushing body is provided with a column groove, the inner wall of the bushing body is fixedly connected with a first connecting ring, the inner wall of the bushing body is fixedly connected with a second connecting ring, the outer wall of the bushing body is provided with a plurality of internal fixing grooves, and the plurality of internal fixing grooves are distributed in a circular array on the outer wall of the bushing body.

[0006] As a preferred technical solution of the utility model, the number of the external fixing grooves is four and they are symmetrically distributed on the outer wall of the gear shaft outer frame.

[0007] As a preferred technical solution of the utility model, the external fixing groove and the internal fixing groove are both in the same position, and the external fixing groove and the internal fixing groove are connected. Compared with the prior art, the utility model has the following beneficial effects:

[0008] 1. The powder metallurgy crankshaft timing gear is provided with a symmetrical first connecting ring and a second connecting ring on the inner wall of the bushing body, so that when the equipment is working, it can limit the first limiting ring and the second limiting ring, and can also effectively avoid grinding inside the equipment, thereby effectively reducing the noise generated when the equipment is working.

[0009] 2. The powder metallurgy crankshaft timing gear is provided with symmetrical external fixing grooves and internal fixing grooves on the outside of the equipment, so that the connection and installation of the equipment becomes convenient and can provide a stable connection for the equipment when the equipment is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the three-dimensional structure of a powder metallurgy crankshaft timing gear;

[0011] Figure 2 It is a schematic diagram of the internal structure of a powder metallurgy crankshaft timing gear;

[0012] Figure 3 It is a schematic diagram of the structure of a gear transmission mechanism in a powder metallurgy crankshaft timing gear;

[0013] Figure 4 This is a schematic diagram of the structure of a bushing installed in a powder metallurgy crankshaft timing gear.

[0014] In the figure: 1. gear shaft outer frame; 2. external fixing groove; 3. protective top block; 4. gear transmission mechanism; 41. gear column; 42. upper transmission gear shaft; 43. first limiting ring; 44. second limiting ring; 45. lower transmission gear shaft; 46. tooth groove; 5. mounting bushing; 51. bushing body; 52. first connecting ring; 53. second connecting ring; 54. column groove; 55. internal fixing groove. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-4A powder metallurgy crankshaft timing gear comprises a gear shaft outer frame 1 and a gear transmission mechanism 4, wherein a tooth column 41 is sleeved on the inner wall of the gear shaft outer frame 1, an upper transmission gear shaft 42 is fixedly connected to the outer wall of the tooth column 41, a first limiting ring 43 is fixedly connected to the outer wall of the tooth column 41, a second limiting ring 44 is fixedly connected to the outer wall of the tooth column 41, a lower transmission gear shaft 45 is fixedly connected to the side of the tooth column 41 away from the upper transmission gear shaft 42, a tooth groove 46 is opened on the outer wall of the lower transmission gear shaft 45, and the tooth groove 46 is distributed in a circumferential array shape. The outer wall of the lower transmission gear shaft 45, wherein the upper transmission gear shaft 42 and the lower transmission gear shaft 45 are integrated equipment, so that when the lower transmission gear shaft 45 is driven by an external force, it can drive the upper transmission gear shaft 42 to perform joint transmission, the outer wall of the gear shaft outer frame 1 is fixedly connected with a protective top block 3, the outer wall of the gear shaft outer frame 1 is provided with an external fixing groove 2, the inner wall of the gear shaft outer frame 1 is provided with a mounting bushing 5, and the protective top block 3 can protect the upper transmission gear shaft 42, which can effectively prevent the upper transmission gear shaft 42 from being damaged during the transmission operation of the equipment. The transmission gear shaft 42 collides with the outside, causing the upper transmission gear shaft 42 to be damaged, and the transmission efficiency of the equipment is reduced. The inner wall of the gear shaft outer frame 1 is sleeved with a bushing body 51, and the inner wall of the bushing body 51 is provided with a column groove 54. The inner wall of the bushing body 51 is fixedly connected with a first connecting ring 52, and the inner wall of the bushing body 51 is fixedly connected with a second connecting ring 53. The outer wall of the bushing body 51 is provided with a plurality of internal fixing grooves 55, and the plurality of internal fixing grooves 55 are distributed in a circumferential array on the outer wall of the bushing body 51. A first connecting ring 52 and a second connecting ring 53 are arranged in pairs inside the bushing body 51, so that they can limit the gear column 41 to prevent it from detaching during operation. There are four external fixing grooves 2, which are symmetrically distributed on the outer wall of the gear shaft outer frame 1, and the external fixing grooves 2 and the internal fixing grooves 55 are in the same position, and the external fixing grooves 2 and the internal fixing grooves 55 are connected, so that when the equipment is fixed later, the connection stability of the equipment is improved, and it is also convenient for the maintenance and loading and unloading of the equipment later.

[0017] Working principle: when the equipment needs to be used, after limiting the connection position between the lower transmission gear shaft 45 and the upper transmission gear shaft 42 and the outside, the operator fixes the external connecting threaded column with the external fixing groove 2 and the internal fixing groove 55 by threaded tightening, which facilitates the operation of the equipment.

[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder metallurgy crankshaft timing gear, comprising a gear shaft outer frame (1) and a gear transmission mechanism (4), characterized in that: The inner wall of the gear shaft outer frame (1) is sleeved with a gear column (41), the outer wall of the gear column (41) is fixedly connected to an upper transmission gear shaft (42), the outer wall of the gear column (41) is fixedly connected to a first limiting ring (43), the outer wall of the gear column (41) is fixedly connected to a second limiting ring (44), the gear column (41) is fixedly connected to a lower transmission gear shaft (45) on a side away from the upper transmission gear shaft (42), the outer wall of the lower transmission gear shaft (45) is provided with tooth grooves (46), and the tooth grooves (46) are distributed in a circumferential array on the outer wall of the lower transmission gear shaft (45).

2. The powder metallurgy crankshaft timing gear according to claim 1, characterized in that: The outer wall of the gear shaft outer frame (1) is fixedly connected with a protective top block (3), the outer wall of the gear shaft outer frame (1) is provided with an external fixing groove (2), and the inner wall of the gear shaft outer frame (1) is provided with a mounting bushing (5).

3. The powder metallurgy crankshaft timing gear according to claim 2, characterized in that: The inner wall of the gear shaft outer frame (1) is sleeved with a bushing body (51), the inner wall of the bushing body (51) is provided with a column groove (54), the inner wall of the bushing body (51) is fixedly connected with a first connecting ring (52), the inner wall of the bushing body (51) is fixedly connected with a second connecting ring (53), the outer wall of the bushing body (51) is provided with a plurality of internal fixing grooves (55), and the plurality of internal fixing grooves (55) are distributed in a circular array on the outer wall of the bushing body (51).

4. The powder metallurgy crankshaft timing gear according to claim 2, characterized in that: The number of the external fixing grooves (2) is four and they are symmetrically distributed on the outer wall of the gear shaft outer frame (1).

5. The powder metallurgy crankshaft timing gear according to claim 3, characterized in that: The external fixing groove (2) and the internal fixing groove (55) are both located at the same position, and the external fixing groove (2) and the internal fixing groove (55) are interconnected.

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