Machine head of gear hobbing machine

Abstract

The utility model provides a machine head of a gear hobbing machine, and belongs to the technical field of gear hobbing machines. The gear hobbing machine solves the problem that in the prior art, due to the fact that a gear hobbing machine is of a split type structure, errors are prone to being generated in connection and matching of all components. The milling cutter comprises a machine shell, an input shaft, a spline shaft, an output shaft and a milling cutter, an input sleeve is formed at the upper end of the machine shell, the input shaft penetrates through the input sleeve, the lower end of the input shaft is fixedly connected with a slotted nut and a gear cover, the lower end of the gear cover is fixedly connected with an L-shaped shaft sleeve, a guide cylinder is formed in the machine shell, and the spline shaft penetrates through and is fixed in the guide cylinder. A ball screw is connected into the spline shaft in a penetrating mode, a helical tooth spline is formed in the middle of the spline shaft, the output shaft is fixed to the lower portion of the machine shell in a penetrating mode, the output shaft is fixedly sleeved with a helical spur gear, the helical spur gear is connected with the helical tooth spline in a meshed mode, the milling cutter is fixed to the output shaft in a sleeving mode, and a tip assembly is arranged at the outer end of the lower side of the machine shell. One end of the output shaft is connected with the tip assembly. The utility model has the advantages of high rigidity, stability and high precision.

Description

Technical Field

[0001] This utility model belongs to the technical field of gear hobbing machines and relates to a gear hobbing machine head. Background Technology

[0002] The gear hobbing machine is one of the most widely used machine tools in gear processing. It can cut spur gears, helical gears, worm gears, sprockets, etc.

[0003] Patent publication number CN209206622U discloses a gear hobbing machine, including a frame, an L-shaped base on the top of the frame, an inverted U-shaped mounting bracket fixed on the top of the vertical support of the L-shaped base, and a hobbing mechanism fixed on the top of the horizontal support of the L-shaped base. The hobbing mechanism includes an I-shaped frustum, two symmetrically arranged bearing seats on the I-shaped frustum, and a rotating shaft that is drivenly connected to the bearing seats. A hob is fixed on the rotating shaft. The input end of the rotating shaft is drivenly connected to the output end of a geared motor through a coupling. A gear mold mechanism is provided on the inverted U-shaped mounting bracket. The gear mold mechanism includes a drive motor, a three-jaw chuck, a gear shaft, a counterweight, and a central shaft. The output shaft of the drive motor is drivenly connected to the three-jaw chuck on the inner side of the left end of the inverted U-shaped mounting bracket through a coupling. The gear shaft is engaged with the three-jaw chuck. The counterweight is screwed to a fixed seat on a lead screw. The central shaft is fixed on the counterweight.

[0004] In the gear hobbing machine provided by this patent, the hobbing mechanism and the gear mold mechanism are separate structures. During the assembly process, errors can easily occur in the connection and cooperation between the various components. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a gear hobbing machine head.

[0006] The objective of this utility model can be achieved through the following technical solution: A gear hobbing machine head includes a housing, an input shaft, a splined shaft, an output shaft, and a milling cutter. An input sleeve is formed at the upper end of the housing, and the input shaft passes through the input sleeve. A slotted nut and a gear cover are fixedly connected to the lower end of the input shaft. An L-shaped bushing is fixedly connected to the lower end of the gear cover. A guide cylinder is formed inside the housing, and the splined shaft passes through and is fixed inside the guide cylinder. A ball screw is connected through the splined shaft, and a helical spline is formed in the middle of the splined shaft. The output shaft passes through and is fixed to the lower part of the housing. A helical cylindrical gear is sleeved and fixed on the output shaft, and the helical cylindrical gear meshes with the helical spline. The milling cutter is sleeved and fixed on the output shaft. A center assembly is provided at the lower outer end of the housing, and one end of the output shaft is connected to the center assembly.

[0007] In the aforementioned gear hobbing machine head, one end of the spline shaft extends out of the guide cylinder, and the other end of the spline shaft passes through the lower end of the L-shaped bushing. A side connecting body is formed on one side of the lower end of the L-shaped bushing, and a first cylindrical roller bearing is provided in the side connecting body. The spline shaft passes through the first cylindrical roller bearing and is connected to the L-shaped bushing.

[0008] In the aforementioned gear hobbing machine head, a longitudinal bevel gear and a transverse bevel gear are fixedly connected in the L-shaped bushing. The longitudinal bevel gear is connected to the input axis, and the transverse bevel gear is connected to one end of the spline shaft. The longitudinal bevel gear and the transverse bevel gear mesh with each other.

[0009] In the aforementioned gear hobbing machine head, one end of the ball screw extends out of one side of the machine housing, and a pulley is fixedly connected to one end of the ball screw.

[0010] In the aforementioned gear hobbing machine head, a second cylindrical roller bearing is provided inside the gear cover, and the input shaft is connected to the second cylindrical roller bearing.

[0011] In the aforementioned gear hobbing machine head, a ball bearing is fixedly mounted on the output shaft at one end of the milling cutter.

[0012] Compared with the prior art, the gear hobbing machine head provided by this utility model has the following beneficial effects: by setting the input shaft, spline shaft and output shaft inside the machine housing, this utility model has an integrated structure with high rigidity and stability, and the gears of each component are more precisely matched, making the motion accuracy of this utility model higher. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0015] In the diagram: 1. Housing; 11. Input sleeve; 12. Guide sleeve; 13. Center assembly; 2. Input shaft; 3. Splined shaft; 31. Ball screw; 32. Helical spline; 33. Pulley; 4. Output shaft; 41. Helical cylindrical gear; 42. Ball bearing; 5. Milling cutter; 6. Slotted nut; 7. Gear cover; 71. Second cylindrical roller bearing; 8. L-shaped bushing; 81. Side connector; 82. First cylindrical roller bearing; 83. Longitudinal bevel gear; 84. Transverse bevel gear. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 2 As shown, this embodiment includes a housing 1, an input shaft 2, a splined shaft 3, an output shaft 4, and a milling cutter 5. A longitudinal input sleeve 11 is formed at the upper end of the housing 1. The input shaft 2 passes through the input sleeve 11 and extends into the housing 1. A slotted nut 6 and a gear cover 7 are fixedly connected to the outer side of the lower end of the input shaft 2. A second cylindrical roller bearing 71 is provided inside the gear cover 7. The input shaft 2 passes through the second cylindrical roller bearing 71 and is connected to the second cylindrical roller bearing 71.

[0018] like Figures 1 to 2 As shown, an L-shaped bushing 8 is fixedly connected to the lower end of the gear cover 7. A longitudinal bevel gear 83 and a transverse bevel gear 84 are fixedly connected to the bottom and side surfaces of the upper end of the L-shaped bushing 8, respectively. The lower end of the input shaft 2 is connected to the longitudinal bevel gear 83. The longitudinal bevel gear 83 and the transverse bevel gear 84 mesh with each other. A guide cylinder 12 is formed inside the housing 1. A spline shaft 3 is fixed inside the guide cylinder 12 and one end of the spline shaft 3 extends out of the guide cylinder 12. The end of the spline shaft 3 extending out of the guide cylinder 12 is connected to the transverse bevel gear 84. A side connecting body 81 is formed on one side of the lower end of the L-shaped bushing 8. A first cylindrical roller bearing 82 is provided in the side connecting body 81. The spline shaft 3 passes through the cylindrical roller bearing and is connected to the L-shaped bushing 8. A ball screw 31 is connected inside the spline shaft 3. A helical spline 32 is formed in the middle of the spline shaft 3.

[0019] like Figures 1 to 2 As shown, the output shaft 4 is fixed to the lower part of the housing 1. A helical cylindrical gear 41 is fixed on the output shaft 4. The helical cylindrical gear 41 meshes with the helical spline 32. The milling cutter 5 is fixed on the output shaft 4. A ball bearing 42 is fixed on the output shaft 4 at one end of the milling cutter 5. A center assembly 13 is provided at the lower outer end of the housing 1. One end of the output shaft 4 is connected to the center assembly 13.

[0020] To elaborate further, such as Figure 2 As shown, one end of the ball screw 31 extends out of one side of the housing 1, and a pulley 33 is fixedly connected to one end of the ball screw 31.

[0021] The working principle of this utility model is as follows: the input shaft 2 rotates to drive the longitudinal bevel gear 83 to rotate, the longitudinal bevel gear 83 drives the transverse bevel gear 84 and the spline shaft 3 to rotate, the helical spline 32 on the spline shaft 3 meshes with the helical cylindrical gear 41, the spline shaft 3 drives the helical cylindrical gear 41 and the output shaft 4 to rotate, and the milling cutter 5 sleeved on the output shaft 4 rotates to cut the gear workpiece.

[0022] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0023] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A gear hobbing machine head, comprising a housing (1), an input shaft (2), a splined shaft (3), an output shaft (4), and a milling cutter (5), characterized in that: An input sleeve (11) is formed at the upper end of the housing (1). The input shaft (2) passes through the input sleeve (11). A slotted nut (6) and a gear cover (7) are fixedly connected to the lower end of the input shaft (2). An L-shaped bushing (8) is fixedly connected to the lower end of the gear cover (7). A guide cylinder (12) is formed inside the housing (1). The splined shaft (3) is fixedly inserted inside the guide cylinder (12). A ball screw (31) is inserted inside the splined shaft (3). A helical spline (32) is formed in the middle of the spline shaft (3). The output shaft (4) is fixed to the lower part of the housing (1). A helical cylindrical gear (41) is sleeved and fixed on the output shaft (4). The helical cylindrical gear (41) meshes with the helical spline (32). The milling cutter (5) is sleeved and fixed on the output shaft (4). A center assembly (13) is provided on the lower outer end of the housing (1). One end of the output shaft (4) is connected to the center assembly (13).

2. The gear hobbing machine head according to claim 1, characterized in that: One end of the spline shaft (3) extends out of the guide cylinder (12), and the other end of the spline shaft (3) passes through the lower end of the L-shaped bushing (8). A side connecting body (81) is formed on one side of the lower end of the L-shaped bushing (8). A first cylindrical roller bearing (82) is provided in the side connecting body (81). The spline shaft (3) passes through the first cylindrical roller bearing (82) and is connected to the L-shaped bushing (8).

3. The gear hobbing machine head according to claim 1, characterized in that: The L-shaped bushing (8) is fixedly connected to a longitudinal bevel gear (83) and a transverse bevel gear (84). The longitudinal bevel gear (83) is connected to the input shaft (2), and the transverse bevel gear (84) is connected to one end of the spline shaft (3). The longitudinal bevel gear (83) and the transverse bevel gear (84) mesh with each other.

4. The gear hobbing machine head according to claim 1, characterized in that: One end of the ball screw (31) extends out of the side of the housing (1), and a pulley (33) is fixedly connected to one end of the ball screw (31).

5. A gear hobbing machine head according to claim 1, characterized in that: The gear cover (7) is provided with a second cylindrical roller bearing (71), and the input shaft (2) is connected to the second cylindrical roller bearing (71).

6. A gear hobbing machine head according to claim 1, characterized in that: A ball bearing (42) is fixedly mounted on the output shaft (4) at one end of the milling cutter (5).

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