Right-angle transmission mechanism for RV-C speed reducer

Abstract

The right-angle transmission mechanism for the RV-C speed reducer comprises a center wheel shaft of a hollow structure, a gear b is integrally integrated on the periphery of the center wheel shaft, the gear b is in meshing transmission with a planetary gear, one end of the center wheel shaft is sleeved with a pair of angular contact ball bearings, and the pair of angular contact ball bearings is externally connected with a bearing seat. The periphery of the other end of the central wheel shaft is sleeved with a deep groove ball bearing, the gear b is close to the deep groove ball bearing, a pipe sleeve is sleeved with the central wheel shaft, and the fixed end of the pipe sleeve and the deep groove ball bearing are arranged on the same side; a gear a is in hole shaft connection with the position, close to the pair of angular contact ball bearings, of the center wheel shaft, an input gear is vertically arranged on one side of the gear a, and the input gear and the gear a are spiral bevel gears and are in mutual meshing transmission. The right-angle transmission mechanism for the RV-C speed reducer has the advantages of being flexible to assemble and suitable for large-load transmission, large-load transmission can be more stable, noise is lower, and the practical efficiency and applicability of the RV-C speed reducer are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cycloid pinwheel reducers, and in particular relates to a right-angle transmission mechanism for an RV-C reducer. Background Art

[0002] Industrial robots are called "the jewel in the crown of manufacturing industry". They are an indispensable part of the manufacturing system and an important symbol to measure the level of scientific and technological innovation and high-end manufacturing industry of a country. The reducer is the core component of the transmission of the robot's mechanical body, which directly affects the working quality and accuracy of the robot. The RV reducer consists of a planetary gear reducer front stage and a cycloidal pinwheel reducer rear stage. It has the advantages of high efficiency, light weight, small size, high rigidity, large load capacity and long life. The input gear and the connected gear of the existing RV-C reducer are involute gears, which are parallel shaft gear transmission mechanisms. The connected gears drive the central wheel shaft to rotate, thereby driving the planetary gears to make the reducer work. The parallel shaft gear transmission mechanism makes the input gear and the motor in a single position, resulting in a fixed installation method of the motor shaft and is not suitable for large load transmission and change of direction transmission. Utility Model Content

[0003] The utility model aims to provide a right-angle transmission mechanism for an RV-C reducer, which has the characteristics of flexible assembly and is suitable for large-load transmission.

[0004] The technical scheme adopted by the utility model is that the RV-C reducer uses a right-angle transmission mechanism, the RV-C reducer has a planetary frame with a plurality of planetary gears installed, including a central wheel shaft with a hollow structure, a gear b is integrally integrated on the outer circumference of the central wheel shaft, the gear b and the planetary gears are located in the same horizontal plane and meshingly transmitted, a pair of angular contact ball bearings are sleeved at one end of the central wheel shaft, the pair of angular contact ball bearings are arranged close to and coaxially, a pair of angular contact ball bearings are externally connected with a bearing seat, a deep groove ball bearing is sleeved at the outer circumference of the other end of the central wheel shaft, the gear b is close to the deep groove ball bearing, a pipe sleeve is sleeved inside the central wheel shaft, and the fixed end of the pipe sleeve is arranged on the same side as the deep groove ball bearing; a gear a is connected to the hole shaft at the position of the central wheel shaft close to the pair of angular contact ball bearings, an input gear is vertically arranged on one side of the gear a, and the input gear and the gear a are both arc bevel gears and meshingly transmitted with each other.

[0005] The utility model is also characterized in that:

[0006] The input gear adopts a small arc bevel gear, and gear a adopts a large arc bevel gear. The small arc bevel gear and the large arc bevel gear are vertically meshed to form a double gear structure.

[0007] A clamping ring is arranged between a pair of angular contact ball bearings, and a clearance fit is formed between the clamping ring and the center wheel shaft.

[0008] The center wheel shaft and gear a are interference fit and fixed with a key connection.

[0009] The deep groove ball bearing is installed in the planetary carrier of the RV-C reducer, and a second gasket is arranged between the deep groove ball bearing and the planetary carrier.

[0010] A first gasket is arranged between the gear a and the pair of angular contact ball bearings.

[0011] A grease layer is filled between the center wheel shaft and the sleeve.

[0012] The pipe sleeve is connected to the planetary carrier through bolts, and the input gear is connected to the motor output shaft through a key.

[0013] The beneficial effects of the utility model are:

[0014] The utility model discloses a right-angle transmission mechanism for an RV-C reducer, which adopts a double gear structure, wherein a small arc bevel gear and a large arc bevel gear are meshed for transmission, and the structure is simple, and the spatial positions of the input gear and the motor are diversified, so that the assembly of the motor output shaft and the reducer is more flexible, thereby improving the practical efficiency and applicability of the RV-C reducer; the transmission for large loads is smoother and the noise is lower; in the transmission, the input gear and the large arc bevel gear of the double gear are both bevel gears, and compared with the involute cylindrical gear, the bevel gear transmission wear is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the right-angle transmission mechanism for the RV-C reducer of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the right-angle transmission mechanism for the RV-C reducer of the utility model;

[0017] Figure 3 This is a schematic diagram of the installation structure of the right-angle transmission mechanism for the RV-C reducer of the utility model;

[0018] Figure 4 It is a schematic diagram of the overall internal structure of the utility model RV-C reducer after the right-angle transmission mechanism is installed.

[0019] In the figure, 1. RV-C reducer, 2. planetary gear, 3. right-angle transmission mechanism, 4. gear a, 5. deep groove ball bearing, 6. sleeve, 7. gear b, 8. center wheel shaft, 9. input gear, 10. bearing seat, 11. first gasket, 12. angular contact ball bearing, 13. retaining ring, 14. second gasket. DETAILED DESCRIPTION

[0020] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0021] Example 1

[0022] The utility model RV-C reducer uses a right-angle transmission mechanism, the structure is as follows Figure 1 As shown, it includes: gear a4, deep groove ball bearing 5, sleeve 6, gear b7, center wheel shaft 8, input gear 9, bearing seat 10, first gasket 11, angular contact ball bearing 12, retaining ring 13 and second gasket 14.

[0023] like Figure 1 and Figure 2 As shown, the center wheel shaft 8 is a hollow structure, with a pair of angular contact ball bearings 12 sleeved at one end, the pair of angular contact ball bearings 12 are tightly and coaxially arranged, the outer sleeve of the pair of angular contact ball bearings 12 is connected with a bearing seat 10, and the outer periphery of the other end of the center wheel shaft 8 is sleeved with a deep groove ball bearing 5, the angular contact ball bearing 12 is installed to bear the axial force of the spiral bevel gear, and the deep groove ball bearing 5 is added for support, which is easy to adjust and disassemble in the axial direction. The outer periphery of the center wheel shaft 8 is integrally integrated with a gear b7, and the two are one part; the gear b7 is close to the deep groove ball bearing 5. The center wheel shaft 8 is sleeved with a pipe sleeve 6, the fixed end of the pipe sleeve 6 is arranged on the same side as the deep groove ball bearing 5, and the other end extends into the center wheel shaft 8, and the small gap between the center wheel shaft 8 and the pipe sleeve 6 is filled with grease to form a grease layer.

[0024] A gear a4 is connected to the hole shaft of the center wheel shaft 8 near a pair of angular contact ball bearings 12. The hole shaft connection is an interference fit and is fixed with a key connection, so that the center wheel shaft 8 and the gear a4 are in a fixed constraint, and the two have no relative rotation tendency, and are coaxial, concentric and rotate together. An input gear 9 is vertically arranged on one side of the gear a4, and the input gear 9 and the gear a4 are meshed for transmission. The input gear 9 is connected to the motor output shaft through a key. The input gear 9 and the gear a4 are both arc bevel gears. The input gear 9 adopts a small arc bevel gear, and the gear a4 adopts a large arc bevel gear. The small arc bevel gear and the large arc bevel gear are vertically meshed to form a double gear structure, and the right-angle transmission is realized through the meshing transmission of the arc bevel gears of the double gears. Compared with the involute cylindrical gear, the bevel gear transmission wears more evenly.

[0025] Example 2

[0026] On the basis of Example 1, Figure 2 As shown, a first gasket 11 is arranged between the gear a4 and a pair of angular contact ball bearings 12, and the position of the gear a4 of the double gear is fixed by the first gasket 11. A retaining ring 13 is arranged in the middle of the pair of angular contact ball bearings 12 to prevent the pair of angular contact ball bearings 12 from contacting each other, and a clearance fit is made between them and the center wheel shaft 8.

[0027] Example 3

[0028] On the basis of Example 2, Figure 3 and Figure 4As shown, the RV-C reducer has a planetary frame with three planetary gears 2 installed. The sleeve 6 in the right-angle transmission mechanism 3 of the RV-C reducer of the utility model is connected to the planetary frame of the RV-C reducer 1 by bolts, and the deep groove ball bearing 5 is installed in the planetary frame of the RV-C reducer. A second gasket 14 is arranged between the deep groove ball bearing 5 and the planetary frame, and the spatial position of the center wheel shaft 8 is made more flexible by adjusting the thickness of the second gasket 14. The gear b7 and the three planetary gears 2 are located in the same horizontal plane and mesh with each other, completing the power transmission from the input gear 9 to the RV-C reducer 1.

[0029] The utility model discloses a right-angle transmission mechanism for an RV-C reducer, and the working process is as follows: a pipe sleeve 6 and an RV-C reducer 1 are connected by bolts, and a deep groove ball bearing 5 and the RV-C reducer 1 are connected by a gasket 14, and the spatial position of a center wheel shaft 8 is changed, so as to adjust the positions of a gear a4 of the double gear and an input gear 9; the input gear 9 transmits power to a large arc bevel gear a4 of the double gear by connecting to a motor, so as to drive the center wheel shaft 8 to rotate, and the center wheel shaft 8 and the gear b7 rotate coaxially to drive the planetary gear 2, so as to make the RV-C reducer 1 work.

[0030] The right-angle transmission mechanism for the RV-C reducer of the utility model has the following advantages:

[0031] 1) The position of the planetary gear of the RV-C reducer is fixed. By adjusting the thickness of the second gasket 14, the spatial position of the central wheel shaft 8 is changed, thereby changing the spatial position of the input gear 9 connected to the motor and the large arc bevel gear of the double gear, making the assembly more flexible and improving the practical efficiency and applicability of the RV-C reducer;

[0032] 2) The right-angle transmission mechanism of the RV-C reducer is more stable and quieter for large load transmission;

[0033] 3) In the transmission, the large arc bevel gears of the input gear and the duplex gear are both bevel gears. Compared with involute cylindrical gears, bevel gear transmission wears more evenly.

Claims

1. A right-angle transmission mechanism for an RV-C reducer, wherein the RV-C reducer (1) has a planet carrier on which a plurality of planetary gears (2) are mounted, and is characterized in that: The invention comprises a central wheel shaft (8) with a hollow structure, a gear b (7) integrally integrated on the outer circumference of the central wheel shaft (8), the gear b (7) and the planetary gear (2) are located on the same horizontal plane and mesh with each other for transmission, a pair of angular contact ball bearings (12) are sleeved on one end of the central wheel shaft (8), the pair of angular contact ball bearings (12) are arranged close to each other and coaxially, the pair of angular contact ball bearings (12) are externally connected to a bearing seat (10), and a deep groove ball bearing (10) is sleeved on the outer circumference of the other end of the central wheel shaft (8). A deep groove ball bearing (5) is provided, a gear b (7) is close to the deep groove ball bearing (5), a sleeve (6) is sleeved in the center wheel shaft (8), and a fixed end of the sleeve (6) is arranged on the same side as the deep groove ball bearing (5); a hole axis of the center wheel shaft (8) close to a pair of angular contact ball bearings (12) is connected to a gear a (4), an input gear (9) is vertically arranged on one side of the gear a (4), and the input gear (9) and the gear a (4) are both arc bevel gears and mesh with each other for transmission.

2. The right-angle transmission mechanism for the RV-C reducer according to claim 1, characterized in that: The input gear (9) is a small arc bevel gear, and the gear a (4) is a large arc bevel gear. The small arc bevel gear and the large arc bevel gear are vertically meshed and driven to form a double gear structure.

3. The right-angle transmission mechanism for RV-C reducer according to claim 1, characterized in that: A clamping ring (13) is provided between the pair of angular contact ball bearings (12), and a clearance fit is formed between the clamping ring (13) and the central wheel shaft (8).

4. The right-angle transmission mechanism for RV-C reducer according to claim 1, characterized in that: The central wheel shaft (8) and the gear a (4) are interference fit and are fixed by a key connection.

5. The right-angle transmission mechanism for RV-C reducer according to claim 1, characterized in that: The deep groove ball bearing (5) is installed in the planetary carrier of the RV-C reducer (1), and a second gasket (14) is arranged between the deep groove ball bearing (5) and the planetary carrier.

6. The right-angle transmission mechanism for RV-C reducer according to claim 1, characterized in that: A first gasket (11) is provided between the gear a (4) and the pair of angular contact ball bearings (12).

7. The right-angle transmission mechanism for RV-C reducer according to claim 1, characterized in that: The gap between the central wheel shaft (8) and the pipe sleeve (6) is filled with a grease layer.

8. The right-angle transmission mechanism for RV-C reducer according to claim 1, characterized in that: The pipe sleeve (6) is connected to the planetary carrier via bolts, and the input gear (9) is connected to the motor output shaft via a key.

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