Horizontal broaching machine for gear key groove machining

Abstract

The horizontal broaching machine comprises a machine tool and a broaching tool, a hydraulic cylinder for driving the broaching tool to act is horizontally arranged at the rear end of the machine tool, a connecting base is arranged in the middle of the machine tool, a groove opening is further formed in a movable base of the machine tool, a gear can be placed in the groove opening, and an eccentric wheel is connected to the connecting base in a pivoted mode through a rotating shaft. The eccentric wheel is not connected with the gear in the initial state and the end state, the inner side surface of the eccentric wheel is attached to the outer side surface of the gear when connected with the gear, and the eccentric wheel rotates through the driving assembly and abuts against and is fastened to the surface of the gear. According to the utility model, the output of the electric push rod is matched with the eccentric wheel and the abutting sleeve block which are linked with each other, so that the gear to be machined synchronously rotates and tends to move in the axial direction and the radial direction, and the gear to be machined is fastened. And meanwhile, after the gear is machined, the electric push rod is retracted, so that the contact structure applying force to the gear can be quickly restored, and the fastening acting force on the gear is cancelled.

Description

Technical Field

[0001] This utility model relates to the technical field of gear processing equipment, specifically a horizontal broaching machine for processing gear keyways. Background Technology

[0002] In transmission systems, when gears and shafts are assembled, keyways are often created in the inner bore of the gear to ensure stability during actual use. These keyways may consist of one, two, or even three internal keyways, with multiple keyways evenly distributed circumferentially. However, keyway machining typically uses a broach. When machining gears with a broach, circumferential vibration is easily generated, affecting the machining accuracy of the keyways.

[0003] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a horizontal broaching machine for machining gear keyways, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a horizontal broaching machine for machining gear keyways, comprising a machine tool and a broach, wherein a hydraulic cylinder for driving the broach is horizontally provided at the rear end of the machine tool, a connecting seat is provided in the middle of the machine tool, and a slot is provided on the movable seat for inserting a gear, wherein an eccentric wheel is pivotally connected to the connecting seat via a rotating shaft, wherein the eccentric wheel is not in contact with the gear in the initial and final states, and the inner surface of the eccentric wheel is in contact with the outer surface of the gear when they are in contact, wherein the eccentric wheel is rotated by a driving assembly and abuts and is fastened to the surface of the gear.

[0008] Preferably, a friction pad is adhered to the inner surface of the eccentric wheel.

[0009] Preferably, the drive assembly includes a transmission gear sleeved on a rotating shaft, and a toothed plate meshing on one side of the transmission gear. The toothed plate is driven by a miniature electric push rod provided on its upper side.

[0010] Preferably, a mating sleeve is connected to the bottom of the toothed plate, and the lower surface of the mating sleeve is adapted to the curvature of the outer surface of the gear.

[0011] Preferably, the machine tool is provided with support guide wheels at both the front end and the middle, and the support guide wheels are pivotally connected to the middle of the machine tool via support rods.

[0012] (III) Beneficial Effects

[0013] By adopting the above technical solution, this utility model has the following advantages compared with the prior art: This utility model provides a horizontal broaching machine for gear keyway machining. Through the output of an electric push rod, in conjunction with an interlocking eccentric wheel and abutment block, it simultaneously realizes the axial and radial rotational tendency of the gear to be machined, achieving the fastening of the gear. Furthermore, after the gear machining is completed, the electric push rod retracts, quickly restoring the contact structure applied to the gear and removing the fastening force on the gear. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention;

[0015] Figure 2 This is a front view of the present utility model;

[0016] Figure 3 This is a schematic diagram of the gear fastening structure at the movable seat in this utility model.

[0017] In the diagram: 1. Machine tool; 2. Hydraulic cylinder; 3. Moving seat; 4. Broach; 5. Support guide wheel; 6. Connecting seat; 7. Gear; 8. Electric push rod; 9. Eccentric wheel; 10. Rotating shaft; 11. Transmission gear; 12. Gear plate; 13. Support rod. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 As shown: A horizontal broaching machine for machining the keyway of a gear 7 includes a machine tool 1. A hydraulic cylinder 2 is horizontally mounted at the rear end of the machine tool 1, and its output end is connected to a movable seat 3. The movable seat 3 slides and restricts its trajectory via slide rails placed on both sides of the machine tool 1. The movable seat 3 is used to restrict the end of the broach 4 (the connection between the two uses a conventional movable connection). A connecting seat 6 is provided in the middle of the machine tool 1. The connecting seat 6 has a through hole for the broach 4 to pass through. At the same time, the movable seat 3 also has a slot for the gear 7 to be inserted. The machining of the keyway on the inner circumference of the gear 7 is achieved by pulling the broach 4 backward until it is completely inserted into the gear 7.

[0020] Because the broach 4 is relatively long, support guide wheels 5 are provided at the front end and middle of the machine tool 1 to support the horizontal movement of the broach 4, so that its movement is relatively stable even when subjected to strong external forces. The support guide wheels 5 are pivotally connected to the middle of the machine tool 1 through the support rod 13.

[0021] During the continuous pulling of the broach 4, the cutting teeth of the broach 4 are spaced in the axial direction (a clinking sound can be heard during use), and under strong pulling force, the gear 7 is only fitted on the broach 4 and simply placed on the connecting seat 6, which easily generates circumferential vibration, resulting in machining accuracy problems of the keyway.

[0022] Therefore, this application addresses the issue of gear 7 being fixed during machining; see appendix. Figure 2-3 An eccentric wheel 9 is pivotally connected to the connecting seat 6 via a rotating shaft 10. The eccentric wheel 9 is not in contact with the gear 7 in the initial and final states. When in contact, the inner surface of the eccentric wheel 9 is essentially in contact with the outer surface of the gear 7. Simultaneously, a friction pad can be adhered to the inner surface of the eccentric wheel 9 to achieve axial compression and fastening of the gear 7. Next, a transmission gear 11 is sleeved on the rotating shaft 10. A toothed plate 12 meshes with one side of the transmission gear 11. The toothed plate 12 is driven downwards by a miniature electric push rod 8 located on its upper side, causing the rotating shaft 10 to rotate. During rotation, the eccentric wheel 9 rotates until it abuts against the gear 7 to be processed.

[0023] Furthermore, an abutting block is connected to the bottom of the tooth plate 12. The lower surface of the abutting block is adapted to the curvature of the outer surface of the gear 7, so that it can abut against the surface of the gear 7 when it is pressed down, thereby hindering its radial deflection to a certain extent.

[0024] The output of the electric push rod 8 synchronously causes the gear 7 to be processed to rotate in both the axial and radial directions, thus achieving the fastening of the gear 7. At the same time, after the gear 7 is processed, the electric push rod 8 is retracted, which can quickly restore the contact structure of the gear 7 and remove the fastening force on the gear 7.

[0025] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A horizontal broaching machine for machining keyways in gears, comprising a machine tool and a broach, wherein a hydraulic cylinder for driving the broach is horizontally provided at the rear end of the machine tool, and a connecting seat is provided in the middle of the machine tool, and a slot is provided on the movable seat for inserting a gear, characterized in that: An eccentric wheel is pivotally connected to the connecting seat via a rotating shaft. The eccentric wheel is not in contact with the gear in the initial and final states, and the inner surface of the eccentric wheel is in contact with the outer surface of the gear. The eccentric wheel is rotated by a drive assembly and is abutted and fastened to the surface of the gear.

2. A horizontal broaching machine for machining gear keyways according to claim 1, characterized in that: The inner surface of the eccentric wheel is adhered with a friction pad.

3. A horizontal broaching machine for gear keyway machining according to claim 1, characterized in that: The drive assembly includes a transmission gear sleeved on a rotating shaft, and a toothed plate meshing on one side of the transmission gear. The toothed plate is driven by a miniature electric push rod provided on the upper side.

4. A horizontal broaching machine for gear keyway machining according to claim 3, characterized in that: The bottom of the toothed plate is connected to an abutting block, and the lower surface of the abutting block is adapted to the curvature of the outer surface of the gear.

5. A horizontal broaching machine for machining gear keyways according to claim 1, characterized in that: The machine tool is equipped with support guide wheels at both the front and middle sections, and the support guide wheels are pivotally connected to the middle section of the machine tool via support rods.

Images