An external gear device for a machine tool reducer

Abstract

This utility model discloses an external gear device for a machine tool reducer, including a splined gear, a splined shaft flange, screws, and locking washers. The splined gear is keyed to the splined shaft of the splined shaft flange and is axially limited by screws and locking washers. The end of the splined shaft flange away from the splined gear is fixedly installed on the reducer, thus solving the problem of connection interference.

Description

Technical Field

[0001] This utility model belongs to the field of machine tool technology and is used to address interference between the connection between a machine tool reducer and an external gear. Specifically, it relates to an external gear device for a machine tool reducer. Background Technology

[0002] Machine tools, as the mother machines of industry, have always been the cornerstone of the machinery industry. The connection between core components is also a crucial parameter. Regarding connection issues, some manufacturers lower the actual operating parameters of the machine tool to meet connection requirements, or resort to welding. However, welding makes it difficult to guarantee the connection precision between gears and reducers, resulting in less than ideal outcomes. This is one of the factors affecting the accuracy of precision machine tools. In an attempt to solve this problem, some machine tool manufacturers sacrifice machine tool performance to ensure high-precision gear connections, causing technological progress in the machine tool industry to stagnate.

[0003] When external gears and reducers interfere with each other during assembly, they are often connected by welding, which is prone to deformation, cannot guarantee connection accuracy, cannot be disassembled, and makes subsequent maintenance difficult.

[0004] Due to interference from external gears, it is necessary to consider increasing the module or the number of teeth to increase the pitch circle diameter for assembly. This operation will increase the support arm, thereby increasing the torque of the reducer. Under the same working conditions, such a structure will reduce the power density and structural rigidity of the entire transmission system, which is detrimental to the transmission system.

[0005] In this context, in order to meet the demands of the machine tool market, it is crucial to develop a dedicated gear device to address the interference between the reducer and the external gear in machine tools, thus resolving the connection issue between the reducer and the external gear. Utility Model Content

[0006] The purpose of this invention is to solve the problems of the prior art by providing an external gear device for a machine tool reducer. Using this gear device, the problem of connection interference can be effectively solved.

[0007] To solve the technical problem, the technical solution of this utility model is: an external gear device for a machine tool reducer, including a splined gear, a splined shaft flange, a screw, and a locking washer. The splined gear is key-connected to the splined shaft of the splined shaft flange. A locking washer is provided at the end of the splined gear away from the splined shaft flange. The screw passes through the locking washer and is fixedly connected to the splined shaft flange. The locking washer is pressed against the end of the splined gear away from the splined shaft flange. The end of the splined shaft flange away from the splined gear is fixedly installed on the reducer.

[0008] Preferably, the splined shaft flange includes an integrally formed splined shaft and a flange end, the splined gear is connected to the splined shaft of the splined shaft flange by splines, and the flange end of the splined shaft flange is fixedly installed on the reducer by internal hex bolts.

[0009] Preferably, the splined shaft flange has multiple bolt holes circumferentially arranged on the flange end, and multiple hexagonal socket bolts pass through the multiple bolt holes to fix the splined shaft flange to the reducer.

[0010] Preferably, the inner wall of the spline gear at the end away from the spline shaft flange is provided with a through hole section, a locking washer is installed in the through hole section, the diameter of the locking washer is smaller than the diameter of the through hole section of the spline gear, and the diameter of the locking washer is larger than the diameter of the spline shaft of the spline shaft flange, and the screw passes through the locking washer and is fixedly connected to the spline shaft of the spline shaft flange.

[0011] Preferably, the locking washer has a tapered hole at its center, and the tapered hole gradually decreases in diameter as it approaches the spline shaft flange. The shape of the screw end is adapted to the shape of the tapered hole.

[0012] Preferably, the end of the aperture section of the spline gear is fitted with an end cap oil seal.

[0013] Preferably, the screw is a countersunk hexagonal head screw.

[0014] Preferably, the splined gear is a gear with a large module and a small number of teeth.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] (1) This utility model proposes an external gear device for a machine tool reducer, including a spline gear, a spline shaft flange, screws and locking washers. The spline gear is keyed to the spline shaft of the spline shaft flange and is axially limited by screws and locking washers. The end of the spline shaft flange away from the spline gear is fixedly installed on the reducer, which solves the problem of connection interference.

[0017] (2) When there is interference during assembly, this utility model uses a special spline structure for connection, which has high connection accuracy. It uses screws and locking washers to limit the axial position, which is easy to disassemble and maintain.

[0018] (3) This utility model can use a gear with a large module and a small number of teeth to significantly reduce the pitch circle diameter of the output gear. While increasing the module improves the load-bearing capacity, the pitch circle is reduced and the length of the support arm is shortened, thereby reducing the output torque of the matching reducer and improving the rigidity and power density of the entire transmission system, thus achieving the ability of small volume and large torque. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the external gear device for a machine tool reducer according to the present invention;

[0020] Figure 2 This is an exploded view of an external gear device for a machine tool reducer according to the present invention;

[0021] Figure 3 This is a schematic diagram illustrating the use of an external gear device for a machine tool reducer according to the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Splined gear, 2. Splined shaft flange, 3. Screw, 4. Locking gasket, 5. End cover oil seal, 6. Socket head bolt, 7. Reducer. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments. The present invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. To provide the public with a thorough understanding of the present invention, specific details are described in detail in the following embodiments, but those skilled in the art will fully understand the present invention even without these details.

[0025] Example 1

[0026] like Figures 1-3 As shown, this utility model discloses an external gear device for a machine tool reducer, including a splined gear 1, a splined shaft flange 2, a screw 3, and a locking washer 4. The splined gear 1 is keyed to the splined shaft of the splined shaft flange 2. A locking washer 4 is provided at the end of the splined gear 1 away from the splined shaft flange 2. The screw 3 passes through the locking washer 4 and is fixedly connected to the splined shaft flange 2. The locking washer 4 is pressed against the end of the splined gear 1 away from the splined shaft flange 2. The end of the splined shaft flange 2 away from the splined gear 1 is fixedly installed on the reducer 7.

[0027] Example 2

[0028] like Figure 2 As shown, preferably, the splined shaft flange 2 includes an integrally formed splined shaft and a flange end. The splined gear 1 is connected to the splined shaft of the splined shaft flange 2 via a spline connection. The flange end of the splined shaft flange 2 is fixedly mounted on the reducer 7 by an internal hex bolt 6.

[0029] like Figure 2 , 3 As shown, preferably, the splined shaft flange 2 has multiple bolt holes circumferentially arranged at the flange end, and multiple hexagonal socket bolts 6 pass through the multiple bolt holes to fix the splined shaft flange 2 to the reducer 7.

[0030] Example 3

[0031] like Figure 2 As shown, preferably, the inner wall of the spline gear 1 away from the spline shaft flange 2 is provided with a smooth hole section, and the locking washer 4 is installed in the smooth hole section. The diameter of the locking washer 4 is smaller than the diameter of the smooth hole section of the spline gear 1, and the diameter of the locking washer 4 is larger than the diameter of the spline shaft of the spline shaft flange 2. The screw 3 passes through the locking washer 4 and is fixedly connected to the spline shaft of the spline shaft flange 2.

[0032] like Figure 1 As shown, preferably, the locking washer 4 has a tapered hole at its center, and the tapered hole gradually decreases in diameter as it approaches the spline shaft flange 2. The shape of the screw 3 end is adapted to the shape of the tapered hole.

[0033] Example 4

[0034] like Figure 1 As shown, preferably, the end of the aperture section of the spline gear 1 is fitted with an end cap oil seal 5.

[0035] Preferably, the screw 3 is a countersunk hexagonal screw.

[0036] Preferably, the splined gear 1 is a gear with a large module and a small number of teeth.

[0037] The working principle of this utility model is as follows:

[0038] like Figures 1-3 As shown, this utility model provides an external gear device for a machine tool reducer, including a splined gear 1, a splined shaft flange 2, a screw 3, and a locking washer 4. The splined gear 1 is keyed to the splined shaft of the splined shaft flange 2. A locking washer 4 is provided at the end of the splined gear 1 away from the splined shaft flange 2. The screw 3 passes through the locking washer 4 and is fixedly connected to the splined shaft flange 2. The locking washer 4 presses against the end of the splined gear 1 away from the splined shaft flange 2. The end of the splined shaft flange 2 away from the splined gear 1 is fixedly mounted on the reducer 7. When the external gear interferes with the reducer connection, the dedicated splined gear structure of this utility model (splined gear 1 and splined shaft flange 2 keyed connection) can meet the normal connection requirements and solve the interference problem.

[0039] In the design of machine tool transmission structures, the transmission shaft is selected with a flange reducer and an external gear according to requirements. However, interference often occurs when the reducer and the external gear are connected, making installation impossible. To solve this problem, a special splined gear structure has been developed. Through the spline transition, the connection problem is perfectly avoided, providing a new method to solve connection interference.

[0040] When the external gear interferes with the connection of the reducer, the splined gear 1, splined shaft flange 2, screw 3, and locking washer 4 are connected to resolve the interference problem, including the following steps:

[0041] Step 1: Clean the splined shaft flange 2 thoroughly.

[0042] Step 2: Install the splined shaft flange 2 onto the reducer 7 using hex socket head cap screws 6;

[0043] Step 3: Connect the spline gear 1 to the spline shaft flange 2;

[0044] Step 4: The spline gear 1 and the locking washer 4 are connected to the spline shaft flange 2 by countersunk hexagonal screws 3;

[0045] Step 5: Connect the end cap oil seal 5 to the spline gear 1.

[0046] This utility model proposes an external gear device for a machine tool reducer, including a splined gear, a splined shaft flange, screws and locking washers. The splined gear is keyed to the splined shaft of the splined shaft flange and is axially limited by screws and locking washers. The end of the splined shaft flange away from the splined gear is fixedly installed on the reducer, thus solving the problem of connection interference.

[0047] This invention uses a dedicated spline structure for connection during assembly interference, resulting in high connection accuracy. It also uses screws and locking washers to limit axial positioning, making it easy to disassemble and maintain.

[0048] This invention can use a large module gear with few teeth to significantly reduce the pitch circle diameter of the output gear. While increasing the module improves the load-bearing capacity, the smaller pitch circle shortens the length of the support lever arm, thereby reducing the output torque of the matching reducer and improving the rigidity and power density of the entire transmission system, thus achieving the capability of small size and high torque.

[0049] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0050] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. An external gear device for a speed reducer of a machine tool, characterized by: The assembly includes a splined gear (1), a splined shaft flange (2), a screw (3), and a locking washer (4). The splined gear (1) is keyed to the splined shaft of the splined shaft flange (2). A locking washer (4) is provided at the end of the splined gear (1) away from the splined shaft flange (2). The screw (3) passes through the locking washer (4) and is fixedly connected to the splined shaft flange (2). The locking washer (4) is pressed against the end of the splined gear (1) away from the splined shaft flange (2). The end of the splined shaft flange (2) away from the splined gear (1) is fixedly mounted on the reducer (7).

2. A gear unit for machine tools according to claim 1, characterized in that: The splined shaft flange (2) includes an integrally formed splined shaft and a flange end. The splined gear (1) is connected to the splined shaft of the splined shaft flange (2) by spline. The flange end of the splined shaft flange (2) is fixedly installed on the reducer (7) by internal hex bolts (6).

3. A gear unit for machine tools according to claim 1, characterized in that: The splined shaft flange (2) has multiple bolt holes circumferentially arranged on the flange end, and multiple hexagonal bolts (6) pass through the multiple bolt holes to fix the splined shaft flange (2) onto the reducer (7).

4. A gear unit for machine tools according to claim 2, characterized in that: The inner wall of the spline gear (1) away from the spline shaft flange (2) is provided with a smooth hole section. The locking washer (4) is installed in the smooth hole section. The diameter of the locking washer (4) is smaller than the diameter of the smooth hole section of the spline gear (1). At the same time, the diameter of the locking washer (4) is larger than the diameter of the spline shaft of the spline shaft flange (2). The screw (3) passes through the locking washer (4) and is fixedly connected to the spline shaft of the spline shaft flange (2).

5. A gear unit for a machine tool according to claim 4, characterized in that: The locking washer (4) has a tapered hole at its center. The tapered hole gradually decreases in diameter as it approaches the spline shaft flange (2). The shape of the screw (3) end is adapted to the shape of the tapered hole.

6. A gear unit for a machine tool according to claim 4, characterized in that: The end of the open section of the spline gear (1) is fitted with an end cap oil seal (5).

7. A gear unit for machine tools according to claim 4, characterized in that: The screw (3) is a countersunk hexagonal screw.

8. A gear unit for machine tools according to claim 4, characterized in that: The spline gear (1) is a gear with a large module and a small number of teeth.

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