Multi-layer precision gear

Abstract

The utility model discloses a multi-layer precision gear which comprises a multi-layer precision gear, the multi-layer precision gear is formed by sequentially arranging a small gear, a middle gear and a large gear, limiting pins are welded to the two ends of the side, close to the large gear, of the small gear and the two ends of the side, close to the large gear, of the middle gear, and pin grooves are formed in the two ends of the interior of the middle gear and the two ends of the interior of the large gear in a penetrating mode. A fixing assembly is arranged on the outer side of the multi-layer precision gear and comprises a long screw rod, and the outer side of the long screw rod is sleeved with a nut. The small gear, the middle gear and the large gear are sequentially arranged and fixed to form the complete multi-layer precision gear, the inner diameters of the shaft holes in the small gear, the middle gear and the large gear are the same, the positions of the threaded grooves are the same, and the small gear, the middle gear and the large gear can be used independently after being combined and disassembled at will.

Description

Technical Field

[0001] The utility model relates to the technical field of gears, in particular to a multi-layer precision gear. Background Art

[0002] Gears are mechanical components with teeth on the rim that can continuously mesh to transmit motion and power. Multi-layer gears are a mechanical device composed of multiple gears, each of which meshes with the adjacent gears and transmits power and motion through rotation. Multi-layer gears are usually composed of gears of different sizes. By combining gears of different sizes, speed and torque conversion can be achieved.

[0003] Authorization announcement number CN215172012U discloses a multi-layer gear, including a large gear, a clamping groove is provided on the left side of the large gear, a fixing groove connected to the clamping groove is provided on the left side of the large gear, a clamping block is slidably connected inside the clamping groove, and a lifting groove is provided on the upper side of the clamping block. The multi-layer gear has a strong fixing effect at the joint of the large gear and the small gear after the speed is changed by the rotating shaft, avoiding the complexity of the adjustment when the traditional cylindrical joint is used, avoiding the large gear and the small gear being fixed by a separate bolt, and then sliding up and down by the elastic force of the spring and the auxiliary rod to assist the lifting plate to ensure the ease of disassembly and replacement of the large gear and the small gear, improving the efficiency of the use of the large gear and the small gear, and avoiding the safety of deformation caused by the large gear and the small gear being directly fixed by bolts.

[0004] The disadvantage of the existing multi-layer gear is that the small gear is fixed to one side of the large gear through a clamping block and a clamping groove, and the small gear and the large gear are used together and cannot be used alone after being disassembled. Therefore, we propose a multi-layer precision gear. Utility Model Content

[0005] The main purpose of the utility model is to provide a multi-layer precision gear, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A multi-layer precision gear, comprising a multi-layer precision gear, wherein the multi-layer precision gear is composed of a small gear, a middle gear and a large gear arranged in sequence, and both ends of the small gear and the middle gear close to the large gear are welded with limit pins, and both ends of the middle gear and the large gear are penetrated with pin grooves;

[0008] A fixing assembly is arranged outside the multi-layer precision gear, and the fixing assembly comprises a long screw rod, and a nut is sleeved outside the long screw rod.

[0009] Furthermore, the small gear, the middle gear and the large gear are all provided with shaft holes extending therethrough, and a keyway is provided on one side of the shaft hole.

[0010] Furthermore, thread grooves are formed through both ends of the small gear, the middle gear and the large gear.

[0011] Furthermore, an anti-skid gasket is sleeved on the outer side of the long screw on one side of the nut.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] Arrange the small gear, medium gear and large gear in sequence, insert the limit pin on one side of the small gear into the pin groove on the middle gear, and insert the limit pin on one side of the middle gear into the pin groove on the large gear, limit and fix the arranged small gear, medium gear and large gear, and fix the arranged small gear, medium gear and large gear with long screws and nuts. The inner diameters of the shaft holes on the small gear, medium gear and large gear are the same, and the positions of the thread grooves are the same. They can be used individually in any combination or after disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of the overall structure of a multi-layer precision gear.

[0015] Figure 2 This is a structural explosion diagram of a multi-layer precision gear of the utility model.

[0016] Figure 3 The utility model is a schematic diagram of the pinion structure of a multi-layer precision gear.

[0017] Figure 4 The utility model is a schematic diagram of the middle gear structure of a multi-layer precision gear.

[0018] Figure 5 The utility model is a schematic diagram of the large gear structure of a multi-layer precision gear.

[0019] Figure 6 The utility model is a schematic diagram of the structure of a fixing component of a multi-layer precision gear.

[0020] In the figure: 1. Multi-layer precision gear; 2. Small gear; 3. Medium gear; 4. Large gear; 5. Fixing assembly; 501. Long screw; 502. Nut; 503. Anti-slip gasket; 6. Shaft hole; 7. Thread groove; 8. Keyway; 9. Limit pin; 10. Pin groove. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-6 As shown, a multi-layer precision gear comprises a multi-layer precision gear 1, wherein the multi-layer precision gear 1 is composed of a pinion 2, a middle gear 3 and a large gear 4 arranged in sequence, and both ends of the pinion 2 and the middle gear 3 close to the large gear 4 are welded with limit pins 9, and both ends of the middle gear 3 and the large gear 4 are penetrated with pin grooves 10;

[0023] A fixing assembly 5 is disposed outside the multi-layer precision gear 1 . The fixing assembly 5 includes a long screw rod 501 . A nut 502 is sleeved outside the long screw rod 501 .

[0024] Among them, Figure 1 and Figure 3 As shown, the pinion 2, the middle gear 3 and the large gear 4 are all provided with an axial hole 6, and a keyway 8 is provided on one side of the axial hole 6. The axial hole 6 facilitates the insertion of the shaft rod into the multi-layer precision gear 1, and the keyway 8 facilitates the insertion of a flat key.

[0025] Among them, Figure 3 and Figure 4 As shown, thread grooves 7 are provided at both ends of the pinion 2, the middle gear 3 and the large gear 4. The thread grooves 7 are provided to facilitate the long screw 501 to fix the arranged pinion 2, the middle gear 3 and the large gear 4.

[0026] Among them, Figure 6 As shown, an anti-skid washer 503 is sleeved on the outer side of the long screw 501 on one side of the nut 502. The provision of the anti-skid washer 503 can prevent the nut 502 from loosening after being tightened.

[0027] It should be noted that the utility model is a multi-layer precision gear. When working, the personnel arrange the small gear 2, the middle gear 3 and the large gear 4 in sequence, and the limit pin 9 on one side of the small gear 2 is inserted into the pin groove 10 on the middle gear 3, and the limit pin 9 on one side of the middle gear 3 is inserted into the pin groove 10 on the large gear 4, so as to limit and fix the arranged small gear 2, the middle gear 3 and the large gear 4, and pass the long screw 501 through the thread groove 7 on the small gear 2, the middle gear 3 and the large gear 4, and fix the small gear 2, the middle gear 3 and the large gear 4 by the anti-skid gasket 503 and the nut 502 to form a complete multi-layer precision gear 1. The setting of the anti-skid gasket 503 can prevent the nut 502 from loosening after tightening.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A multi-layer precision gear, comprising a multi-layer precision gear (1), characterized in that: The multi-layer precision gear (1) is composed of a small gear (2), a middle gear (3) and a large gear (4) arranged in sequence, and both ends of the small gear (2) and the middle gear (3) close to the large gear (4) are welded with limit pins (9), and both ends of the middle gear (3) and the large gear (4) are penetrated by pin grooves (10); A fixing assembly (5) is arranged on the outside of the multi-layer precision gear (1), and the fixing assembly (5) comprises a long screw rod (501), and a nut (502) is sleeved on the outside of the long screw rod (501).

2. A multi-layer precision gear according to claim 1, characterized in that: The small gear (2), the middle gear (3) and the large gear (4) are all provided with shaft holes (6) running through them, and a keyway (8) is provided on one side of the shaft hole (6).

3. A multi-layer precision gear according to claim 1, characterized in that: The small gear (2), the middle gear (3) and the large gear (4) are all provided with thread grooves (7) running through the two ends thereof.

4. The multi-layer precision gear according to claim 1, characterized in that: An anti-slip gasket (503) is sleeved on the outer side of the long screw (501) located on one side of the nut (502).

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