Gear transmission structure for speed reducer

Abstract

The utility model provides a gear transmission structure for a speed reducer, which comprises a shell, an end cover, an input shaft, an output shaft, a first gear, a second gear, a supporting seat, a weight stack, a mounting sleeve and an outer sheath, and the weight stack is arranged on the output shaft, so that the balance weight is adjustable. When the gear on the output shaft or the output transmission part connected with the output shaft is changed, the weight stack can be adjusted. One end of the output shaft is connected with the mounting sleeve and is fixed by a connecting key; and the counterweight sheet is sleeved on the mounting sleeve. The supporting seat is connected with the end cover, the through hole accommodates the mounting sleeve, and the outer sheath is connected with the mounting sleeve for protection. And the second gear is positioned between the outer part of the output shaft shell and the mounting sleeve. Thus, the positions and the number of the weight stacks can be accurately adjusted according to different gear configurations or output transmission part conditions, the rotational inertia of the output shaft is effectively balanced, vibration and noise caused by unbalance are reduced, it is ensured that the speed reducer can stably operate under various working conditions, good speed reduction working performance is kept, and the service life of the speed reducer is prolonged. And the overall transmission efficiency and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reducer equipment, in particular to a gear transmission structure for a reducer. Background Art

[0002] A reducer primarily consists of gears, shafts, bearings, and a housing. Gears are the core component of a reducer, achieving speed reduction and torque increase through the meshing of the gears. They are typically made of high-quality alloy steel and precision-machined to ensure precision and strength. For example, in some heavy-duty reducers, the gear tooth surfaces undergo heat treatment processes such as quenching to enhance wear resistance and load-bearing capacity. The shaft mounts the gears and transmits torque. It must possess sufficient strength and rigidity to withstand the forces transmitted by the gears. The shaft is typically made of carbon steel or alloy steel, and its design must consider its load capacity, determining appropriate dimensional parameters such as diameter and length. Bearings are mounted on the shaft to support the rotation of the shaft and gears. Common types include rolling bearings and sliding bearings. Rolling bearings offer advantages such as low friction and flexible starting, while sliding bearings are suitable for high-speed, heavy-load, and demanding applications requiring high rotational precision.

[0003] Cylindrical gear transmission is the most common form of gear transmission, including spur gears and helical gears. Spur gear transmission is characterized by simple manufacturing and low cost, but it is prone to vibration and noise when operating at high speed and heavy load.

[0004] In the gear transmission mechanism of a reducer, improper gear positioning can have adverse effects. Poor gear positioning on the input and output shafts can lead to an unbalanced transmission counterweight. From a static perspective, this can cause the reducer's overall center of gravity to shift, making it difficult to ensure stable placement during installation and potentially causing vibration. Dynamically, unbalanced gear positioning can generate periodic centrifugal forces during the meshing transmission process. This exacerbates uneven force on the shafts, subjecting the bearings to additional radial forces and accelerating bearing wear. Furthermore, this unbalanced force can cause vibration and noise in the transmission system, reducing transmission efficiency and potentially leading to poor gear meshing, increased tooth surface wear, and tooth root fatigue fracture, impacting the reducer's service life and operational reliability. Utility Model Content

[0005] In view of this, the technical problem to be solved by the present invention is: how to provide a gear transmission structure for a reducer to realize an adjustable setting of the counterweight when different gears are set on the output shaft or different output transmission components are connected to the output shaft, thereby ensuring the deceleration working performance of the reducer.

[0006] To achieve the above-mentioned purpose, the utility model proposes a gear transmission structure for a reducer, which includes a housing, an end cover, an input shaft, an output shaft, a first gear, a second gear, a support seat, a counterweight, a mounting sleeve, and an outer sleeve;

[0007] The end covers are respectively provided on both sides of the housing, a portion of the input shaft is provided inside the housing, and another portion of the input shaft is located outside the housing, a portion of the output shaft is provided inside the housing, and another portion of the output shaft is located outside the housing;

[0008] The first gear is arranged on the input shaft, the second gear is arranged on the output shaft, and a gear ratio between the first gear and the second gear is greater than 1;

[0009] The mounting sleeve is connected to the end of the output shaft away from the second gear, and the mounting sleeve is connected to the output shaft via a connecting key. The counterweight plate is mounted on the mounting sleeve, and the support base is connected to the end cover. A through hole is formed inside the support base for accommodating the mounting sleeve, and the outer sleeve is connected to the mounting sleeve.

[0010] The second gear is located between a portion of the output shaft located outside the housing and the mounting sleeve in an axial direction of the output shaft.

[0011] Furthermore, the input shaft is located above the output shaft in the vertical direction.

[0012] Furthermore, the counterweight plate is arranged along the axial direction of the output shaft.

[0013] Furthermore, the mounting sleeve is provided with a limiting rib, which is protruding along the circumferential direction of the mounting sleeve and is used to limit the movement of the counterweight plate along the axial direction of the output shaft.

[0014] Compared with the related art, the utility model proposes a gear transmission structure for a reducer, which has the beneficial effect of achieving adjustable counterweight by arranging a counterweight on the output shaft. When the gear on the output shaft or the connected output transmission component changes, the counterweight can be adjusted. One end of the output shaft is connected to the mounting sleeve and fixed with a connecting key, and the counterweight is sleeved on the mounting sleeve. The support seat is connected to the end cover, and its through hole accommodates the mounting sleeve, and the outer sleeve is connected to the mounting sleeve for protection. The second gear is located between the outer part of the output shaft housing and the mounting sleeve. In this way, the position and number of the counterweight can be accurately adjusted according to different gear configurations or output transmission components, effectively balancing the rotational inertia of the output shaft, reducing vibration and noise caused by imbalance, ensuring that the reducer can operate stably under various working conditions, maintaining good deceleration working performance, extending the service life of the reducer, and improving the overall transmission efficiency and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Fig. 1 This is a front view of the gear transmission structure for the reducer in the embodiment of the present utility model;

[0016] Fig. 2 This is a schematic diagram of the internal structure of the gear transmission structure for the reducer in the embodiment of the present utility model. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0018] See Figs. 1-2 As shown, the utility model proposes a gear transmission structure for a reducer, which includes a housing 11, an end cover 12, an input shaft 13, an output shaft 14, a first gear 21, a second gear 22, a support seat 31, a counterweight plate 32, a mounting sleeve 33, and an outer sleeve 34.

[0019] End covers 12 are respectively provided on both sides of the housing 11, a portion of the input shaft 13 is provided inside the housing 11, and another portion of the input shaft 13 is located outside the housing 11, a portion of the output shaft 14 is provided inside the housing 11, and another portion of the output shaft 14 is located outside the housing 11, and the input shaft 13 is located above the output shaft 14 in the vertical direction.

[0020] The first gear 21 is provided on the input shaft 13 , and the second gear 22 is provided on the output shaft 14 . The gear ratio between the first gear 21 and the second gear 22 is greater than 1.

[0021] A mounting sleeve 33 is connected to the end of the output shaft 14 away from the second gear 22. The mounting sleeve 33 is connected to the output shaft 14 through a connecting key. The counterweight plate 32 is sleeved on the mounting sleeve 33. The counterweight plate 32 is arranged along the axial direction of the output shaft 14. The support seat 31 is connected to the end cover. A through hole is formed inside the support seat 31 for accommodating the mounting sleeve 33. The outer sleeve 34 is connected to the mounting sleeve 33.

[0022] Support base 31 connects to the end cap, and its internal through-hole accommodates mounting sleeve 33. This provides a stable support base for mounting sleeve 33 and counterweight 32, ensuring the stable position of all components during reducer operation, reducing sway and displacement, and ensuring transmission accuracy. Counterweight 32 is mounted on mounting sleeve 33 and arranged along the axis, effectively balancing the differences in rotational inertia caused by the uneven distribution of components such as gears, reducing vibration and noise, and improving the smooth operation of the reducer.

[0023] The mounting sleeve 33 is firmly connected to the output shaft 14 through a connecting key to ensure stable power transmission. The limiting ribs 35 thereon protrude in the circumferential direction, which can accurately limit the movement of the counterweight plate 32 in the axial direction, preventing the counterweight plate 32 from being displaced due to operation impact, etc., thereby ensuring the effectiveness and stability of the counterweight.

[0024] The outer sheath 34 is connected to the mounting sleeve 33 to play a protective role, preventing external impurities, dust, etc. from eroding and interfering with the counterweight plate 32, the mounting sleeve 33 and other components, thereby extending the service life of the components and maintaining the efficient and stable operation of the entire gear transmission structure.

[0025] The second gear 22 is located between a portion of the output shaft 14 located outside the housing 11 and the mounting sleeve 33 in the axial direction of the output shaft 14 .

[0026] The mounting sleeve 33 is provided with limiting ribs, which protrude along the circumferential direction of the mounting sleeve 33 and are used to limit the movement of the counterweight plate 32 along the axial direction of the output shaft 14 .

[0027] In this way, the number of counterweights 32 can be precisely adjusted according to different gear configurations or output transmission components, effectively balancing the rotational inertia of the output shaft 14, reducing vibration and noise caused by imbalance, ensuring that the reducer can operate stably under various working conditions and maintain good deceleration performance.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A gear transmission structure for a reducer, characterized in that: It includes a housing, an end cover, an input shaft, an output shaft, a first gear, a second gear, a support seat, a weight plate, a mounting sleeve, and an outer sheath; The end covers are respectively provided on both sides of the housing, a portion of the input shaft is provided inside the housing, and another portion of the input shaft is located outside the housing, a portion of the output shaft is provided inside the housing, and another portion of the output shaft is located outside the housing; The first gear is arranged on the input shaft, the second gear is arranged on the output shaft, and a gear ratio between the first gear and the second gear is greater than 1; The mounting sleeve is connected to the end of the output shaft away from the second gear, and the mounting sleeve is connected to the output shaft via a connecting key. The counterweight plate is mounted on the mounting sleeve, and the support base is connected to the end cover. A through hole is formed inside the support base for accommodating the mounting sleeve, and the outer sleeve is connected to the mounting sleeve. The second gear is located between a portion of the output shaft located outside the housing and the mounting sleeve in an axial direction of the output shaft.

2. The gear transmission structure for a speed reducer according to claim 1, wherein: The input shaft is located above the output shaft in a vertical direction.

3. The gear transmission structure for a speed reducer according to claim 1, wherein: The counterweight plate is arranged along the axial direction of the output shaft.

4. The gear transmission structure for a speed reducer according to claim 1, wherein: The mounting sleeve is provided with a limiting rib, which is protruding along the circumferential direction of the mounting sleeve and is used to limit the movement of the counterweight plate along the axial direction of the output shaft.

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