Speed change mechanism for machine tool

Abstract

The utility model discloses a speed change mechanism for a machine tool, and relates to the technical field of gear shifting assemblies. The first shaft is mounted in the box body; the driving gear is mounted on the first shaft; the second shaft is mounted in the box body, and the second shaft and the first shaft are arranged in parallel; the driven gear is movably mounted on the second shaft; the shifting fork assembly is connected with the driven gear, and the shifting fork assembly is located in the box body; the driving unit is installed on the box body, and the output end of the driving unit is connected with the shifting fork assembly; and the guide shaft is installed in the box body, a shifting fork assembly is installed on the guide shaft, the guide shaft is parallel to the first shaft and the second shaft, and the guide shaft and the shifting fork assembly jointly conduct axial movement. The gearbox assembly solves the technical problem that an existing gearbox assembly is inconvenient to detect, maintain and adjust.

Description

Technical Field

[0001] The utility model relates to the technical field of gear shifting components, in particular to a speed changing mechanism for a machine tool. Background Art

[0002] The machine tool is a processing tool with a large market share, large cutting torque, wide application, and excellent cost performance. The gear is switched according to the user's rotation. When switching, it is switched through the speed change mechanism inside the spindle box.

[0003] In the existing speed change mechanism, the fork assembly is usually used to drive the gears to mesh to complete the speed change adjustment. However, the movement displacement of the fork assembly is usually detected by the displacement sensor built into the box. This makes the displacement sensor inconvenient to assemble and is not conducive to maintenance and ensuring the accuracy of the detection results. In addition, when the fork assembly is moving, the support length is limited, which is not conducive to ensuring the stability of the speed change. Utility Model Content

[0004] The utility model aims to provide a speed change mechanism for a machine tool, which solves the technical problem of inconvenient detection, maintenance and adjustment of a gearbox component in the prior art.

[0005] The embodiment of the present application discloses a speed change mechanism for a machine tool, comprising:

[0006] Box;

[0007] A first shaft is installed inside the box;

[0008] A driving gear, mounted on the first shaft;

[0009] A second shaft is installed inside the box, and the second shaft is arranged parallel to the first shaft;

[0010] A driven gear movably mounted on the second shaft;

[0011] A shift fork assembly connected to the driven gear, and the shift fork assembly is located inside the box;

[0012] A driving unit is installed on the box, and an output end of the driving unit is connected to the fork assembly;

[0013] A guide shaft is installed inside the box body, and the fork assembly is installed on the guide shaft. The guide shaft is parallel to the first shaft and the second shaft, and the guide shaft moves axially along with the fork assembly.

[0014] The present application is provided with a guide shaft that can move axially, so as to realize the back and forth movement of the fork assembly, which is convenient for the subsequent detection of the movement displacement of the guide shaft and is convenient for maintenance and adjustment.

[0015] Based on the above technical solution, the embodiment of the present application can also be improved as follows:

[0016] Furthermore, a shaft sleeve is installed on an inner wall of one side of the box body, and a through hole is opened on a side of the box body opposite to the shaft sleeve;

[0017] One end of the guide shaft is movably connected to the sleeve, and the other end extends to the inside of the through hole. The beneficial effect of adopting this step is that the position detection is completed by the back and forth movement of the guide shaft, that is, passing through the through hole, thereby improving the accuracy of the detection result.

[0018] Furthermore, a gap is left between the inner bottom side of the sleeve and the end of the guide shaft. The beneficial effect of adopting this step is that the gap can provide space for the guide shaft to move, thereby ensuring the stability of the movement.

[0019] Furthermore, the inner diameter of the through hole is larger than the outer diameter of the guide shaft. The beneficial effect of adopting this step is that the large-sized through hole is conducive to the back-and-forth movement of the guide shaft.

[0020] Furthermore, a limit plate is installed inside the box, a guide sleeve is installed on the limit plate, the guide shaft is slidably installed inside the guide sleeve, and the central axis of the guide sleeve is colinear with the central axis of the shaft sleeve. The beneficial effect of adopting this step is that the stability of the guide shaft movement can be guaranteed through the cooperation of the limit plate and the guide sleeve.

[0021] Furthermore, the fork assembly is located on the side of the limiting plate facing the shaft sleeve. The beneficial effect of adopting this step is that the stability of the movement of the fork assembly can be ensured by the limiting plate.

[0022] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0023] The present application designs the internal structure of the speed change mechanism, in which a guide shaft is provided, which can increase the support length of related components and ensure the stability of the fork assembly during movement; when the movement of the fork assembly needs to be adjusted, the guide shaft protruding from the box is conducive to measurement, which is convenient for the staff to make precise adjustments and controls. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a speed change mechanism for a machine tool according to a specific embodiment of the utility model;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure inside the middle box;

[0027] The specific reference numerals are as follows:

[0028] 1-housing; 2-first shaft; 3-driving gear; 4-second shaft; 5-driven gear; 6-shift fork assembly; 7-driving unit; 8-guide shaft; 9-shaft sleeve; 10-through hole; 11-limiting plate; 12-guide sleeve. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Example:

[0034] like Figure 1-2 As shown, an embodiment of the present application discloses a speed change mechanism for a machine tool, which can be applied to a lathe or other processing equipment. Compared with the existing gearbox, it can ensure better stability and can also better measure the displacement, facilitating subsequent precise control and adjustment.

[0035] The specific structure of this application includes:

[0036] Box 1, which is a gearbox box, and its specific shape can be designed and adapted according to the structure of other components inside the box;

[0037] A first shaft 2 is installed inside the housing 1. The first shaft 2 is the main shaft of the speed change mechanism, which is subsequently connected with other components to receive power;

[0038] A driving gear 3 is mounted on the first shaft 2, and the driving gear is subsequently meshed with the driven gear to complete the speed change function;

[0039] The second shaft 4 is installed inside the box 1, and the second shaft 4 is arranged parallel to the first shaft 2;

[0040] A driven gear 5 is movably mounted on the second shaft 4, and the second shaft 4 cooperates with the driven gear 5 to realize power output;

[0041] The shift fork assembly 6 is connected to the driven gear 5 and is located inside the housing 1. The shift fork assembly 6 is a conventional component of the speed change mechanism, and its specific structure will not be described in detail here.

[0042] The driving unit 7 is installed on the housing 1, and the output end of the driving unit 7 is connected to the fork assembly 6. The driving unit 7 can be a cylinder, an electric cylinder or other types of driving parts, and only needs to provide axial power to drive the fork assembly 6 to move, thereby further driving the driven gear 5 to move and mesh with the driving gear 3 to complete the speed change function;

[0043] The guide shaft 8 is installed inside the box body 1, and the fork assembly 6 is installed on the guide shaft 8. The guide shaft 8 is parallel to the first shaft 2 and the second shaft 4, and the guide shaft 8 follows the fork assembly 6 to perform axial movement. Compared with the existing speed change mechanism, the present application designs the guide shaft 8 as a follower mechanism, which can increase the support length of the corresponding components and better ensure the stability of the entire mechanism.

[0044] With respect to the specific structure of the guide shaft 8, the present application further explains as follows: a shaft sleeve 9 is installed on the inner wall of one side of the box body 1, and a through hole 10 is opened on the side of the box body 1 opposite to the shaft sleeve 9;

[0045] One end of the guide shaft 8 is movably connected to the sleeve 9, and the other end extends to the inside of the through hole 10; compared with the existing fork assembly and other related matching parts (the existing ones are basically fixed), the present application can better detect the displacement of the fork assembly movement, that is, the displacement of the fork assembly is converted into the displacement of the guide shaft 8 extending out of the box body 1, which is convenient for measurement and can further ensure the accuracy of the measurement results.

[0046] When the guide shaft 8 of the present application moves back and forth, there needs to be enough space at the movable end of the guide shaft 8. Therefore, it is necessary to design the installation method of the sleeve 9 and the guide shaft 8, that is, a gap is left between the inner bottom side of the sleeve 9 and the end of the guide shaft 8, so that there is enough space for the guide shaft 8 to move when it moves.

[0047] In order to ensure the stability and smoothness of the guide shaft 8 during movement, the inner diameter of the through hole 10 is larger than the outer diameter of the guide shaft 8, so that when the guide shaft 8 moves axially, the end of the guide shaft 8 will not interfere.

[0048] In order to further ensure the stability of the movement of corresponding accessories inside the box, such as the guide shaft 8, the fork assembly 6 and other components, the present application provides a limit plate 11, which is installed inside the box 1, and is perpendicular to the first axis 2 and the second axis 4. Specifically, a guide sleeve 12 is installed on the limit plate 11, and the guide shaft 8 is slidably installed inside the guide sleeve 12, and the central axis of the guide sleeve 12 is colinear with the central axis of the sleeve 9. The guide sleeve 12 is used to ensure that the guide shaft 8 can move stably.

[0049] Specifically, the fork assembly 6 is located on the side of the limit plate 11 facing the shaft sleeve 9 , and the limit plate 11 can be used to control the position of the fork assembly 6 to ensure its stable movement within a certain range, thereby achieving the meshing of the driven gear 5 and the driving gear 3 .

[0050] The present application drives the fork assembly 6 to move axially through the driving unit 7, and drives the guide shaft 8 to move at the same time. By measuring the end of the guide shaft 8, accurate data on the movement of the fork assembly 6 can be obtained to facilitate subsequent adjustments.

[0051] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A speed change mechanism for a machine tool, characterized in that: include: Box; A first shaft is installed inside the box; A driving gear, mounted on the first shaft; A second shaft is installed inside the box, and the second shaft is arranged parallel to the first shaft; A driven gear movably mounted on the second shaft; A shift fork assembly connected to the driven gear, and the shift fork assembly is located inside the box; A driving unit is installed on the box, and an output end of the driving unit is connected to the fork assembly; A guide shaft is installed inside the box body, and the fork assembly is installed on the guide shaft. The guide shaft is parallel to the first shaft and the second shaft, and the guide shaft moves axially along with the fork assembly.

2. The speed change mechanism for a machine tool according to claim 1, characterized in that: A shaft sleeve is installed on the inner wall of one side of the box body, and a through hole is opened on the side of the box body opposite to the shaft sleeve; One end of the guide shaft is movably connected to the shaft sleeve, and the other end extends into the through hole.

3. The speed change mechanism for a machine tool according to claim 2, characterized in that: A gap is left between the inner bottom side of the sleeve and the end of the guide shaft.

4. The speed change mechanism for a machine tool according to claim 2, characterized in that: The inner diameter of the through hole is greater than the outer diameter of the guide shaft.

5. The speed change mechanism for a machine tool according to claim 2, characterized in that: A limit plate is installed inside the box body, a guide sleeve is installed on the limit plate, the guide shaft is slidably installed inside the guide sleeve, and the central axis of the guide sleeve is colinear with the central axis of the shaft sleeve.

6. The speed change mechanism for a machine tool according to claim 5, characterized in that: The shift fork assembly is located on a side of the limiting plate facing the shaft sleeve.

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