Improved internal transmission structure of power tool turret

Abstract

The utility model belongs to the technical field of power tool turrets, and particularly relates to an improved power tool turret internal transmission structure which comprises an output gear shaft, an input bevel gear, an input shaft, a power tool apron and a power motor. The other end of the input shaft is connected with a power motor through a spline housing, one end of the output gear shaft is connected with a power tool apron, the output gear shaft sequentially comprises a bevel gear section, a shaft section and an open slot section, a groove is formed in the connecting position of the bevel gear section and the shaft section, an open slot is formed in one end of the open slot section, and the bevel gear section is connected with the shaft section. An originally adopted split type gear shaft is improved into the integrally-formed output gear shaft, the rigidity of the output gear shaft is greatly improved, noise generated due to the fact that the output gear shaft is not concentric in the operation process is reduced, the service life of the output gear shaft is prolonged, meanwhile, original unnecessary structures such as key grooves are removed, and the cost is reduced. And the structural performance of the output gear shaft is optimized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power cutter tower technical field, concretely relates to an improved power cutter tower internal transmission structure. BACKGROUND

[0002] Power cutter tower is evolved from common servo cutter tower, compared with common servo cutter tower, power cutter tower is additionally installed with a set of power device to drive cutter to complete independent rotation, thereby realizing a series of complex turning, milling, drilling, tapping, carving and other processing actions on numerical control lathe.

[0003] Power cutter tower internal transmission is mainly driven by a pair of 90-degree cross-arranged circular bevel gears to rotate output gear shaft, and the output gear shaft end opening groove is connected with the linear key at the tail of power cutter seat, thereby driving the rotation of power cutter seat.

[0004] In addition, power motor and input shaft are generally connected through the plum blossom type expansion sleeve coupling, and the plum blossom type expansion sleeve coupling is prone to tooth damage under high speed or high load, the middle plum blossom pad is damaged and deformed, thereby reducing the service life and rotation accuracy, and cannot withstand too high temperature, and the plum blossom coupling is prone to noise in high speed transmission process, affecting the use comfort and safety. TECHNICAL FIELD

[0005] The utility model aims at providing an improved power cutter tower internal transmission structure to solve the problems in the prior art.

[0006] The utility model provides the following technical scheme:

[0007] The utility model provides an improved power cutter head internal transmission structure, including output spline shaft, input bevel gear, input shaft, power cutter seat and power motor, the input bevel gear is installed to the one end of input shaft and is connected with output spline shaft meshing, the other end of input shaft is connected with power motor through spline sleeve, the one end of output spline shaft is connected with power cutter seat, output spline shaft includes bevel gear section, shaft section and open slot section in proper order, the bevel gear section includes face cone part, straight line part, back cone part and tail end, the bevel gear section is provided with recess at the junction with shaft section, and the one end of open slot section is provided with open slot.

[0008] Preferably, the included angle between the face cone part and the straight line part is consistent with the included angle between the back cone part and the straight line part.

[0009] Preferably, the recess is annular, the recess groove bottom is chamfered, and the recess groove wall near the face cone part side is parallel to the back cone part.

[0010] Preferably, the input bevel gear and the output spline shaft are provided with a gear box outside, the input shaft is provided with a sleeve outside, and the gear box and the sleeve are integrally formed.

[0011] Preferably, the gear box is provided with a heat dissipation cover on one side.

[0012] Preferably, the tail end is provided with a shaft shoulder at the junction with the back cone part.

[0013] Preferably, the open slot is in a linear type, and the open slot bottom is provided with a center hole.

[0014] Preferably, the power cutter seat tail is provided with a linear key, and the linear key is clamped with the open slot.

[0015] Preferably, the output spline shaft is made of low-carbon alloy steel 20CrMnTi material, and the surface is carburized and quenched.

[0016] Preferably, the spline sleeve is made of 42CrMo alloy steel material.

[0017] 1) By improving the original split spline shaft to an integrally formed output spline shaft, the rigidity of the output spline shaft is greatly improved, the noise generated by the eccentricity of the output spline shaft during operation is reduced, the service life of the output spline shaft is prolonged, and due to the design of the integral spline shaft, the unnecessary keyway and other structures are removed, so that the structural performance of the output spline shaft is optimized.

[0018] 2) By the integral casting and processing of the gear box and the sleeve, the overall rigidity is increased.

[0019] 3) by power motor and input shaft between by traditional plum blossom type expansion sleeve coupling is changed to spline sleeve structure, shorten the axial length, reduce the working noise, reduce the installation space, and improve the transmission rigidity and transmission accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall sectional view schematic diagram of the internal transmission structure of the power cutter tower of the utility model;

[0021] Figure 2 is the local assembly schematic diagram of the internal transmission structure of the power cutter tower of the utility model;

[0022] Figure 3 is the A-A sectional view structure schematic diagram of the output gear shaft of the utility model;

[0023] Figure 4 is the overall structure schematic diagram of the output gear shaft of the utility model;

[0024] Figure 5 is the overall structure schematic diagram of the output gear shaft in the prior art.

[0025] The signs in the drawing are as follows:

[0026] 1-output gear shaft;2-input bevel gear;3-input shaft;4-power cutter seat;5-bevel gear section;6-shaft section;7-opening groove section;8-face cone part;9-straight line part;10-back cone part;11-groove;12-opening groove;13-tail end;14-shaft shoulder;15-heat dissipation cover;16-power motor;17-spline sleeve;18-gear box;19-sleeve. DETAILED DESCRIPTION

[0027] The specific embodiments of the utility model are described in detail below in combination with the drawings, so that the person skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in combination with its preferred specific embodiments, these embodiments are only illustrative, not limiting the scope of the utility model.

[0028] As shown in the accompanying drawings, Figures 1-4 An improved internal transmission structure of power cutter tower, including output gear shaft 1, input bevel gear 2, input shaft 3, power cutter seat 4 and power motor 16, the input bevel gear 2 is installed to input shaft 3 one end and is connected with output gear shaft 1 meshing, the input shaft 3 other end is connected with power motor 16 through spline sleeve 17, the output gear shaft 1 one end is connected with power cutter seat 4, the output gear shaft 1 on sequentially including have bevel gear section 5, shaft section 6 and opening groove section 7, output gear shaft 1 is integrally formed, the bevel gear section 5 includes face cone part 8, straight line part 9, back cone part 10 and tail end 13, the bevel gear section 5 and shaft section 6 junction are provided with groove 11, the opening groove section 7 one end is provided with opening groove 12.

[0029] Wherein, the power motor 16 and the input shaft 3 are changed from traditional plum blossom type expansion sleeve coupling to spline sleeve 17, which solves the problem that the original plum blossom type expansion sleeve coupling is easy to be damaged under high speed or high load, the intermediate plum blossom pad is damaged and deformed, thereby reducing the service life and rotation accuracy.

[0030] In addition, as shown in the accompanying drawings, Figure 5 As shown in the accompanying drawings, the prior art adopts split tooth shaft, which needs to additionally open key groove at the shaft neck for connecting the shaft and the gear, while the output tooth shaft 1 is integrally machined and formed in the present application, without opening key groove, which improves the rigidity of the output tooth shaft 1 in use. Moreover, due to the integral machining of the output tooth shaft 1, the space for installing the locking nut for fixing the gear is removed, which becomes part of the integral tooth shaft, optimizing the performance of the output tooth shaft 1. In addition, the relative shaft segment runout of the finished gear surface can be controlled within 0.03, which greatly reduces the noise generated by the eccentricity of the output tooth shaft 1 during operation, improves the operation accuracy, and prolongs the service life of the output tooth shaft 1.

[0031] Specifically, the included angle between the face cone part 8 and the straight line part 9 is consistent with the included angle between the back cone part 10 and the straight line part 9. The cone center is kept close to the center of gravity of the output tooth shaft 1, reducing the vibration of the bevel gear segment 5 when driving high-speed cutters.

[0032] Specifically, the groove 11 is annular, the groove bottom is chamfered, the groove wall near the face cone part 8 side is parallel to the back cone part 10, and the setting of the groove 11 improves the stress at the connection between the bevel gear segment 5 and the shaft segment 6, increases the limit of the bevel gear segment 5, and further reduces the possibility of cracking of the bevel gear segment 5.

[0033] Specifically, the input bevel gear 2 and the output tooth shaft 1 are provided with a gear box 18, and the input shaft 3 is provided with a sleeve 19. The gear box 18 and the sleeve 19 are integrally formed, that is, the gear box 18 and the sleeve 19 are integrally cast and machined, which increases the overall rigidity and uses QT450-10 material. The precision machining of the sleeve 19 part and the gear box 18 part is completed in the same step using INT420 large turning and milling compound machine tool, which improves the precision.

[0034] Specifically, the gear box 18 is provided with a heat dissipation cover 15 on one side, which is conducive to the outward transfer of heat in the gear box 18, solving the problem of internal temperature rise.

[0035] Specifically, the tail end 13 is provided with a shaft shoulder 14 at the connection with the back cone part 10 for bearing installation, and the tail end 13 can be provided with process holes for subsequent machining.

[0036] Specifically, the open slot 12 is in the form of a straight line, and a top hole is arranged at the bottom of the open slot 12, which is used as a process hole for positioning when the output gear shaft 1 is processed, and a straight key is arranged at the tail of the power cutter 4, which is clamped with the open slot 12, so that the power cutter 4 is connected with the output gear shaft 1 in transmission.

[0037] Specifically, the output gear shaft 1 is made of low-carbon alloy steel 20CrMnTi material, which has low carbon content, excellent toughness, and surface carburizing and quenching treatment, so as to improve the hardness and wear resistance of the output gear shaft 1.

[0038] Specifically, the spline sleeve 17 is made of 42CrMo alloy steel material, and the axial length of the spline sleeve 17 is smaller than that of the plum blossom type expansion coupling, so as to reduce the installation space and improve the transmission rigidity and transmission accuracy.

[0039] The processing technology of the output gear shaft is as follows:

[0040] The blank process hole and the open slot 12 of the workpiece to be processed are coarsely processed by using a four-axis machining center. Then, the outer shape of the bevel gear segment 5 on the output gear shaft 1 is coarsely processed and the outer circle reference is precisely machined by using a Mazak numerical control lathe in cooperation with the process hole of the tail end 13 and the top hole arranged at the bottom of the open slot 12. After the heat allowance is left, the carburizing and surface quenching are performed after the shot blasting burr removal, so as to improve the surface hardness and wear resistance of the output gear shaft 1. The heat-processed precise machining and the precise milling of the tooth surface of the output gear shaft 1 are performed by using a Mazak nine-axis turning and milling composite machining center, the tooth surface accuracy is measured by using the on-machine measuring needle after the processing is completed, and finally the working surface of the open slot 12 is precisely processed on the Mazak vertical machining center.

[0041] The utility model discloses an output gear shaft 1 is improved to the integral molding from the original split type gear shaft, greatly improves the rigidity of the output gear shaft 1, reduces the noise generated due to the eccentricity of the output gear shaft 1 when running, prolongs the service life of the output gear shaft 1, and simultaneously, due to the integral gear shaft design, the unnecessary key groove and other structures of the original are removed, so that the performance of the output gear shaft 1 is optimized. In addition, the gear box 18 and the sleeve 19 are integrally cast and processed, the overall rigidity is increased. The spline sleeve 17 is arranged between the power motor 16 and the input shaft 3, and the transmission rigidity and transmission accuracy are further improved.

[0042] The above only is the preferred implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any modification and replacement based on the technical scheme and the utility model concept provided by the utility model should be covered in the protection scope of the utility model.

Claims

1. An improved internal transmission structure for a power turret, comprising an output gear shaft (1), an input bevel gear (2), an input shaft (3), a power tool holder (4), and a power motor (16), characterized in that: The input bevel gear (2) is installed on one end of the input shaft (3) and meshes with the output gear shaft (1). The other end of the input shaft (3) is connected to the power motor (16) through a spline sleeve (17). One end of the output gear shaft (1) is connected to the power tool holder (4). The output gear shaft (1) includes a bevel gear section (5), a shaft section (6) and an open slot section (7) in sequence. The bevel gear section (5) includes a face cone part (8), a straight part (9), a back cone part (10) and a tail end (13). A groove (11) is provided at the connection between the bevel gear section (5) and the shaft section (6). An open slot (12) is provided at one end of the open slot section (7).

2. The improved internal transmission structure of the power turret according to claim 1, characterized in that: The included angle between the face cone (8) and the straight section (9) is the same as the included angle between the back cone (10) and the straight section (9).

3. The improved internal transmission structure of the power turret according to claim 1, characterized in that: The groove (11) is ring-shaped, and the bottom of the groove (11) is chamfered. The groove wall of the groove (11) near the face cone (8) is parallel to the back cone (10).

4. The improved internal transmission structure of the power turret according to claim 1, characterized in that: The input bevel gear (2) and the output gear shaft (1) are provided with a gearbox body (18), and the input shaft (3) is provided with a sleeve (19). The gearbox body (18) and the sleeve (19) are integrally formed.

5. The improved internal transmission structure of the power turret according to claim 4, characterized in that: A heat dissipation cover (15) is provided on one side of the gearbox body (18).

6. The improved internal transmission structure of the power turret according to claim 1, characterized in that: A shoulder (14) is provided at the connection between the tail end (13) and the back cone (10).

7. The improved internal transmission structure of the power turret according to claim 1, characterized in that: The opening groove (12) is in the shape of a straight line, and a top hole is provided at the bottom of the opening groove (12).

8. The improved internal transmission structure of the power turret according to claim 1, characterized in that: The power tool holder (4) is provided with a key at its tail, and the key engages with the opening groove (12).

9. The improved internal transmission structure of the power turret according to claim 1, characterized in that: The output gear shaft (1) is made of low-carbon alloy steel 20CrMnTi and its surface is carburized and quenched.

10. The improved internal transmission structure of the power turret according to claim 1, characterized in that: The spline sleeve (17) is made of 42CrMo alloy steel.

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