Wear-resistant straight gear

Abstract

The utility model discloses a wear-resisting straight gear which comprises a middle shaft sleeve and a fixed gear ring, the middle shaft sleeve is provided with a key groove and arranged in the center of the fixed gear ring, and transmission teeth are distributed on the fixed gear ring in the circumferential direction. A movable gear ring is in threaded connection with the middle shaft sleeve, the diameter of the movable gear ring is different from that of the fixed gear ring, a limiting screw rod is arranged on the movable gear ring in a penetrating mode, and a threaded hole corresponding to the limiting screw rod is formed in the fixed gear ring so that the limiting screw rod can limit free rotation of the movable gear ring relative to the fixed gear ring. The gear ring is novel in structure, the distance between the movable gear ring and the fixed gear ring is adjustable, the movable gear ring can be detached and replaced, and the gear ring is economical and practical.

Description

Technical Field

[0001] The utility model belongs to the technical field of gears, and in particular relates to a wear-resistant spur gear. Background Art

[0002] In agricultural production, agricultural machinery is an essential machine equipment, which outputs the power of the engine to various mechanisms through the transmission system to complete the corresponding functions, and gears are indispensable transmission parts in the transmission system.

[0003] In order to improve the synchronous rotation effect of the gears, double gears or multiple gears are set on a shaft sleeve. This type of gear is usually made of a gear ring and a shaft sleeve cast in one piece. The distance between the gear rings cannot be adjusted and the applicability is poor. When one of the gear rings is damaged, the entire gear needs to be replaced and the intact part cannot be used, resulting in waste. Summary of the invention

[0004] The utility model aims to solve the above technical problems existing in the prior art and provides a wear-resistant spur gear with novel structure, adjustable spacing between a movable gear ring and a fixed gear ring, and detachable and replaceable movable gear ring, which is economical and practical.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A wear-resistant spur gear comprises: a central shaft sleeve and a fixed gear ring, the central shaft sleeve is provided with a keyway, the central shaft sleeve is arranged at the center of the fixed gear ring, and the fixed gear ring is provided with transmission teeth distributed circumferentially; the characteristic is: a movable gear ring is threaded on the central shaft sleeve, the diameter of the movable gear ring is different from the diameter of the fixed gear ring, a limiting screw is passed through the movable gear ring, and a threaded hole corresponding to the limiting screw is provided on the fixed gear ring, so that the limiting screw limits the movable gear ring from rotating freely relative to the fixed gear ring. The spur gear has a novel structure, the spacing between the movable gear ring and the fixed gear ring is adjustable, and the movable gear ring can be disassembled and replaced, which is economical and practical.

[0007] Furthermore, an oil filling hole is provided on the fixed gear ring, an annular oil storage groove is provided inside the fixed gear ring, the annular oil storage groove is communicated with the oil filling hole, and an oil guide channel is provided between the annular oil storage groove and the top surface of the transmission tooth. Lubricating oil is injected into the oil filling hole, the lubricating oil flows into the annular oil storage groove, and then flows out through the oil guide channel to lubricate the transmission tooth, and there is no need to lubricate each transmission tooth separately, which reduces the difficulty of refueling and is simple to operate.

[0008] Furthermore, an oil plug is clamped on the oil filling hole, which is convenient to remove. After the oil filling is completed, the oil filling hole is blocked by the oil plug to prevent the lubricating oil from flowing out of the oil filling hole and being wasted.

[0009] Furthermore, a threaded through hole communicating with the keyway is provided on the side of the middle sleeve, a bolt is installed on the threaded through hole, one end of the bolt is inserted into the opening on the surface of the output shaft, and the axial movement of the output shaft is restricted by the bolt, thereby improving the connection reliability between the output shaft and the middle sleeve.

[0010] Furthermore, a reinforced connection portion is provided between the middle shaft sleeve and the fixed gear ring, which improves the connection strength between the middle shaft sleeve and the fixed gear ring. The connection between the two is not easy to crack and is durable.

[0011] Furthermore, the surface of the fixed gear ring is coated with a wear-resistant layer, which may be a copper-zinc alloy layer with good wear resistance and is not prone to wear and rust, thereby extending the service life of the fixed gear ring.

[0012] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0013] 1. The movable gear ring is detachable and replaceable and can be used immediately after installation. During installation, first screw the movable gear ring onto the middle shaft sleeve, then pass the limiting screw through the mounting through hole on the movable gear ring and screw it into the threaded hole on the fixed gear ring. The limiting screw is locked and cannot move freely. The free rotation of the movable gear ring is limited by the limiting screw, so that the movable gear ring is limited and fixed on the middle shaft sleeve, which is stable and reliable. The movable gear ring can be removed by removing the limiting screw, which is simple and convenient. The fixed gear ring is meshed and connected with the matching gear for transmission, and the movable gear ring is meshed and connected with the matching gear for transmission, and power is provided to the two transmission components at the same time, which has strong adaptability. The height position of the movable gear ring on the middle shaft sleeve can be adjusted, thereby changing the spacing between the movable gear ring and the fixed gear ring to adapt to the actual spacing between the two transmission components, which has strong applicability.

[0014] 2. Inject lubricating oil into the oil filling hole, the lubricating oil flows into the annular oil storage tank, and then flows out through the oil guide channel to lubricate the transmission gear. There is no need to lubricate each transmission gear separately, which reduces the difficulty of refueling and is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a wear-resistant spur gear of the utility model;

[0017] Figure 2 This is a structural schematic diagram of the connection between the middle shaft sleeve and the movable gear ring in the utility model;

[0018] Figure 3 This is a schematic diagram of the structure inside the fixed gear ring in the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of fixing the outer part of the gear ring in the utility model.

[0020] In the figure: 1-middle shaft sleeve; 2-fixed gear ring; 3-reinforced connection part; 4-keyway; 5-threaded through hole; 6-transmission tooth; 7-movable gear ring; 8-limiting screw; 9-mounting through hole; 10-threaded hole; 11-oil filling hole; 12-annular oil storage tank; 13-oil guide channel; 14-oil plug. DETAILED DESCRIPTION

[0021] like Figures 1 to 4 As shown, the utility model is a wear-resistant spur gear, comprising: a middle shaft sleeve 1 and a fixed gear ring 2, the middle shaft sleeve 1 is arranged at the center of the fixed gear ring 2, and a reinforced connecting part 3 is provided between the middle shaft sleeve 1 and the fixed gear ring 2, which improves the connection strength between the middle shaft sleeve 1 and the fixed gear ring 2, and the connection between the two is not easy to crack and is durable.

[0022] The middle sleeve 1 is provided with a keyway 4, which is connected with the output shaft, and the side of the middle sleeve 1 is provided with a threaded through hole 5 which is connected with the keyway 4. Bolts are installed on the threaded through hole 5, so that one end of the bolt extends into the opening on the surface of the output shaft, and the axial movement of the output shaft is limited by the bolt, thereby improving the connection reliability between the output shaft and the middle sleeve 1.

[0023] Transmission teeth 6 are distributed circumferentially on the fixed gear ring 2, a movable gear ring 7 is threaded on the middle shaft sleeve 1, the diameter of the movable gear ring 7 is different from that of the fixed gear ring 2, a limit screw 8 is passed through the movable gear ring 7, and a mounting through hole 9 is provided on the movable gear ring 7 for the limit screw 8 to pass through, and a threaded hole 10 corresponding to the limit screw 8 is provided on the fixed gear ring 2.

[0024] The movable gear ring 7 is detachable and replaceable and can be used whenever it is installed. During installation, the movable gear ring 7 is first screwed onto the middle shaft sleeve 1, and then the limiting screw 8 is passed through the installation through hole 9 and screwed into the threaded hole 10. The limiting screw 8 is locked and cannot move freely. The free rotation of the movable gear ring 7 is limited by the limiting screw 8, so that the movable gear ring 7 is limited and fixed on the middle shaft sleeve 1, which is stable and reliable; the limiting screw 8 can be removed to remove the movable gear ring 7, which is simple and convenient; the fixed gear ring 2 is meshed and connected with the matching gear for transmission, and the movable gear ring 7 is meshed and connected with the matching gear for transmission, and power is provided to the two transmission components at the same time, and the adaptability is strong; the height position of the movable gear ring 7 on the middle shaft sleeve 1 can be adjusted, thereby changing the spacing between the movable gear ring 7 and the fixed gear ring 2 to adapt to the actual spacing between the two transmission components, and the adaptability is strong.

[0025] An oil filling hole 11 is provided on the fixed gear ring 2, and an annular oil storage groove 12 is provided inside the fixed gear ring 2. The annular oil storage groove 12 is communicated with the oil filling hole 11, and an oil guide channel 13 is provided between the annular oil storage groove 12 and the top surface of the transmission gear 6. Lubricating oil is injected into the oil filling hole 11, and the lubricating oil flows into the annular oil storage groove 12 and then flows out through the oil guide channel 13 to lubricate the transmission gear 6. There is no need to lubricate each transmission gear 6 separately, which reduces the difficulty of refueling and is simple to operate.

[0026] The oil filling hole 11 is clamped with an oil plug 14. The oil plug 14 is easy to remove. After the oil filling is completed, the oil filling hole 11 is blocked by the oil plug 14 to prevent the lubricating oil from flowing out of the oil filling hole 11 and wasting.

[0027] The surface of the fixed gear ring 2 is coated with a wear-resistant layer. The wear-resistant layer can be made of a copper-zinc alloy layer, which has good wear resistance and is not easy to wear and rust, thereby extending the service life of the fixed gear ring 2.

[0028] The above are only specific embodiments of the utility model, but the technical features of the utility model are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the utility model to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the utility model.

Claims

1. A wear-resistant spur gear, comprising: A middle shaft sleeve and a fixed gear ring, wherein the middle shaft sleeve is provided with a keyway, the middle shaft sleeve is arranged at the center of the fixed gear ring, and the fixed gear ring is provided with transmission teeth distributed circumferentially; Features: A movable gear ring is threaded on the middle shaft sleeve, and the diameter of the movable gear ring is different from that of the fixed gear ring. A limiting screw is passed through the movable gear ring, and a threaded hole corresponding to the limiting screw is provided on the fixed gear ring, so that the limiting screw limits the movable gear ring from freely rotating relative to the fixed gear ring.

2. A wear-resistant spur gear according to claim 1, characterized in that: An oil filling hole is arranged on the fixed gear ring, an annular oil storage groove is arranged in the fixed gear ring, the annular oil storage groove is communicated with the oil filling hole, and an oil guide channel is arranged between the annular oil storage groove and the top surface of the transmission tooth.

3. A wear-resistant spur gear according to claim 2, characterized in that: An oil plug is clamped on the oil filling hole.

4. The wear-resistant spur gear according to claim 1, characterized in that: A threaded through hole communicating with the keyway is provided on the side surface of the middle shaft sleeve.

5. The wear-resistant spur gear according to claim 1, characterized in that: A reinforced connection portion is provided between the middle shaft sleeve and the fixed gear ring.

6. The wear-resistant spur gear according to claim 1, characterized in that: The surface of the fixed gear ring is coated with a wear-resistant layer.

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