Auxiliary supporting structure of follow-up lead screw

Abstract

The utility model discloses a follow-up lead screw auxiliary supporting structure which comprises a guide rail matched with the guide rail and a supporting assembly capable of moving on the guide rail, the supporting assembly comprises a supporting block used for supporting a lead screw and a sliding block used for being connected to the guide rail in a sliding mode, the supporting block and the sliding block are arranged in a synchronous movement mode, and an elastic piece is arranged between the supporting block and the sliding block. The supporting surface of the supporting block elastically abuts against the peripheral surface of the lead screw and is in sliding connection with the peripheral surface of the lead screw, so that self-adaptive auxiliary supporting arrangement is formed for the lead screw, abnormal abrasion caused by too large friction force between the supporting block and the lead screw can be avoided, meanwhile, self-adaptive auxiliary supporting for the lead screw is achieved, and then the machining precision of a machine tool is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool lead screws, and particularly relates to a follow-up lead screw auxiliary support structure. Background Art

[0002] The lead screw auxiliary support structure can move along with the movement of the moving parts of the machine tool, so as to effectively shorten the supported distance of the lead screw, that is, to ensure that the lead screw does not sag, and further ensure the load and positioning accuracy of the machine tool movement.

[0003] At present, the lead screw auxiliary support structure mainly includes a vertical support and a follow-up support. Among them, the supporting force between the supporting bearing bush and the lead screw of the existing follow-up auxiliary support structure cannot be adjusted, which easily causes excessive friction between the two, and then leads to easy wear of the supporting bearing bush, and finally affects the machining accuracy and other related performances of the machine tool. Content of the Utility Model

[0004] Therefore, to solve the above problems, the utility model provides a follow-up lead screw auxiliary support structure, which can realize that the supporting surface of the support block elastically abuts against the outer peripheral surface of the lead screw through the elastic force of the elastic member, so as to avoid abnormal wear caused by excessive friction between the two, and at the same time realize the adaptive auxiliary support for the lead screw, and further ensure the machining accuracy, stability and service life of the machine tool.

[0005] To achieve the above object, the technical solution provided by the utility model is as follows:

[0006] The utility model provides a follow-up lead screw auxiliary support structure, which includes a mutually matched guide rail and a support assembly movable on the guide rail; the support assembly includes a support block for supporting the lead screw and a slider slidably connected to the guide rail, and the support block and the slider are arranged to move synchronously; an elastic member is arranged between the support block and the slider, so that the supporting surface of the support block elastically abuts against the outer peripheral surface of the lead screw and forms a sliding connection, so as to form an adaptive auxiliary support for the lead screw.

[0007] Furthermore, a limiting and guiding member is arranged between the support block and the slider, and the limiting and guiding member is used for limiting the deformation amount of the elastic member and ensuring that the support block and the slider move synchronously; the support block is limited by the limiting and guiding member and moves along the guiding direction of the limiting and guiding member, so that the supporting surface of the support block slidably cooperates with the outer peripheral surface of the lead screw.

[0008] Further, the limiting and guiding member includes a limiting pin, a screw, and a limiting hole. The supporting block or the slider is provided with the limiting hole, and the limiting pin is movably assembled in the limiting hole; the screw passes through the supporting block and the slider and is fastened to the limiting pin so that the supporting block and the slider are arranged to move synchronously; the depth of the limiting hole is greater than the length of the limiting pin to limit the deformation amount of the elastic member.

[0009] Further, the elastic member is a spring, and both the supporting block and the slider are provided with mounting holes for mating with the spring; one end of the spring is assembled in the mounting hole of the supporting block, and the other end is assembled in the mounting hole of the slider.

[0010] Further, the spring is provided with a guide rod, and the spring is movably sleeved on the guide rod; one end of the guide rod is fixed in the mounting hole of the slider, and the other end slidably passes through the mounting hole of the supporting block to guide and limit the movement track of the supporting block.

[0011] Further, one end of the supporting block facing the lead screw is provided with a mounting groove for mating with the installation of the lead screw, and the mounting groove is assembled with a bearing bush for mating with the movement of the lead screw; the bearing bush is the supporting surface of the supporting block.

[0012] Further, the bearing bush is a brass self-lubricating bearing bush or a graphite self-lubricating bearing bush.

[0013] Further, the number of the supporting components is multiple, and the multiple supporting components are integrally connected by a connecting rod.

[0014] Through the technical solution provided by the present utility model, the following beneficial effects are achieved:

[0015] Through the cooperation of the slider, the elastic member and the supporting block, the supporting block can adaptively expand and contract under the elastic support of the elastic member, and further, the supporting surface of the supporting block can elastically abut against the outer peripheral surface of the lead screw. When a sliding connection is formed between the supporting block and the rotating lead screw, abnormal wear caused by excessive friction between the two can be avoided, and at the same time, the self-adaptive auxiliary support for the lead screw is realized, thereby ensuring the machining accuracy, stability and service life of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a cross-sectional view of the supporting assembly assembled on the guide rail in the first perspective in the embodiment;

[0017] Figure 2 Shown is a cross-sectional view of the supporting assembly assembled on the guide rail in the second perspective in the embodiment;

[0018] Figure 3The figure shows a partial external view of the follow-up lead screw auxiliary support structure in the embodiment. Detailed implementation manners

[0019] To further illustrate each embodiment, the present utility model provides attached drawings. These attached drawings are part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0020] Now, the present utility model will be further described in conjunction with the attached drawings and the detailed implementation manners.

[0021] Refer to Figures 1 to 3 As shown, this embodiment provides a follow-up lead screw auxiliary support structure, including a mutually cooperating guide rail 1 and a support assembly 2 that can move on the guide rail 1. The support assembly 2 includes a support block 21 for supporting the lead screw and a slider 22 for slidably connecting to the guide rail 1. The support block 21 and the slider 22 are arranged vertically, and the slider 22 can slide on the guide rail 1 located below it to cooperate with the movement of the lead screw, and the support block 21 and the slider 22 are arranged for synchronous movement.

[0022] An elastic member is arranged between the support block 21 and the slider 22. Specifically, the elastic member is a spring 23. The number of springs 23 is 4 and they are respectively located at the four corners of the support assembly 2 to ensure uniform distribution of the elastic force, and the support surface of the support block 21 elastically abuts against the outer peripheral surface of the lead screw to form a sliding connection, so as to form an adaptive auxiliary support for the lead screw.

[0023] In this embodiment, the guide rail 1 is a linear guide rail and is arranged parallel to the lead screw.

[0024] The number of support assemblies 2 is 4. The 4 support assemblies 2 are integrally connected through a connecting rod 4 to form a whole for supporting a longer lead screw, so as to ensure that the local part of the lead screw does not sag. Of course, the number of support assemblies 2 can also be 2, 3 or others, which is specifically determined according to the size of the lead screw.

[0025] The upper end of the support block 21 facing the lead screw is provided with an installation groove 212 for fitting the installation of the lead screw. The installation groove 212 is equipped with a bearing bush 211 for cooperating with the movement of the lead screw, and the bearing bush 211 is the support surface of the support block 21.

[0026] Both the support block 21 and the slider 22 are provided with installation holes for cooperating with the spring 23. One end of the spring 23 is assembled in the installation hole of the support block 21, and the other end is assembled in the installation hole of the slider 22, so as to ensure that one end of the spring 23 is fixedly supported by the slider 22, and the other end of the spring 23 elastically supports the support block 21.

[0027] Through the cooperation of the slider 22, the spring 23 and the support block 21, the support block 21 can adaptively expand and contract or lift under the elastic support of the spring 23, so as to enable the support surface of the support block 21 to elastically abut against the outer peripheral surface of the lead screw. When a sliding connection is formed between the support block 21 and the rotating lead screw, abnormal wear caused by excessive friction between the two can be avoided, and at the same time, the adaptive auxiliary support for the lead screw is realized, thereby ensuring the machining accuracy, stability and service life of the machine tool.

[0028] In another preferred embodiment, as Figure 1 shown, a limit guiding member 3 is provided between the support block 21 and the slider 22. The limit guiding member 3 is used to limit the deformation amount of the spring 23 and ensure that the support block 21 and the slider 22 move synchronously. The support block 21 is restricted by the limit guiding member 3 and moves along the guiding direction of the limit guiding member 3 or the up and down direction, so that the support surface of the support block 21 is slidably fitted to the outer peripheral surface of the lead screw.

[0029] More specifically, the limit guiding member 3 includes a limit pin 31, a screw 32 and a limit hole 33, and the limit guiding member 3 is located in the middle of two same-side springs 23. The support block 21 is provided with a limit hole 33 at the bottom facing the slider 22. The limit pin 31 is movably assembled in the limit hole 33. The screw 32 is inserted from the bottom of the slider 22, then passes through the slider 22 upward, and then extends into the limit hole 33 of the support block 21 and is fastened to the limit pin 31 located in the limit hole 33, so as to realize the synchronous movement of the support block 21 and the slider 22 of the same support assembly 2. At this time, the depth of the limit hole 33 is greater than the length of the limit pin 31 to ensure that there is a certain space in the limit hole 33 to allow the support block 21 to rise and fall along the elastic force direction of the spring 23 or the up and down direction.

[0030] When the end of the limit pin 31 abuts against the inner wall of the limit hole 33, the support block 21 can no longer move downward, and at the same time, the compression amount of the spring 23 is also limited, that is, the deformation amount of the spring 23 is limited to ensure the safe operation of the machine tool.

[0031] Of course, in other embodiments, the limit hole 33 can also be provided on the slider 22. Therefore, the positions of the limit holes 33 can be interchanged.

[0032] Further preferably, the spring 23 is provided with a guide rod, and the spring 23 is movably sleeved on the guide rod. One end of the guide rod is fixed to the mounting hole of the slider 22, and the other end is slidably passed through the mounting hole of the support block 21 to guide and limit the movement track of the support block 21.

[0033] Further preferably, the bearing shell 211 in this embodiment is a brass self-lubricating bearing shell. Of course, it can also be a graphite self-lubricating bearing shell. In this way, it can ensure that the bearing shell 211 supporting the lead screw has the advantages of high mechanical strength, high hardness, high elasticity, wear resistance, fatigue resistance, corrosion resistance, and small elastic hysteresis.

[0034] Although the present utility model is specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present utility model in terms of form and details without departing from the spirit and scope of the present utility model defined by the appended claims, and all of them fall within the protection scope of the present utility model.

Claims

1. A follow-up lead screw auxiliary support structure, characterized in that: Comprising a cooperating guide rail and a support assembly movable on the guide rail; The support assembly includes a support block for supporting a lead screw and a slider for slidably connecting to the guide rail, and the support block and the slider are arranged for synchronous movement; An elastic member is arranged between the support block and the slider, so that the support surface of the support block elastically abuts against the outer peripheral surface of the lead screw and forms a sliding connection, thereby forming an adaptive auxiliary support for the lead screw.

2. The follow-up lead screw auxiliary support structure according to claim 1, wherein: A limiting and guiding member is arranged between the support block and the slider, and the limiting and guiding member is used to limit the deformation amount of the elastic member and ensure that the support block and the slider are arranged for synchronous movement; the support block is limited by the limiting and guiding member and moves along the guiding direction of the limiting and guiding member, so that the support surface of the support block slidably cooperates with the outer peripheral surface of the lead screw.

3. The follow-up lead screw auxiliary support structure according to claim 2, characterized in that: The limiting and guiding member includes a limiting pin, a screw and a limiting hole, the support block or the slider is provided with the limiting hole, and the limiting pin is movably assembled in the limiting hole; the screw passes through the support block and the slider and is fastened to the limiting pin, so that the support block and the slider form a synchronous movement setting; the depth of the limiting hole is greater than the length of the limiting pin to limit the deformation amount of the elastic member.

4. The follow-up lead screw auxiliary support structure according to any one of claims 1-3, characterized in that: The elastic member is a spring, and both the support block and the slider are provided with mounting holes for cooperating with the spring; one end of the spring is assembled in the mounting hole of the support block, and the other end is assembled in the mounting hole of the slider.

5. The follow-up lead screw auxiliary support structure according to claim 4, characterized in that: The spring is provided with a guide rod, and the spring is movably sleeved on the guide rod; one end of the guide rod is fixed in the mounting hole of the slider, and the other end slidably passes through the mounting hole of the support block to guide and limit the movement track of the support block.

6. The follow-up lead screw auxiliary support structure according to any one of claims 1-3, characterized in that: One end of the support block facing the lead screw is provided with a mounting groove for cooperating with the installation of the lead screw, and a bearing bush for cooperating with the movement of the lead screw is assembled in the mounting groove; the bearing bush is the support surface of the support block.

7. The follow-up lead screw auxiliary support structure according to claim 6, characterized in that: The bearing bush is a brass self-lubricating bearing bush or a graphite self-lubricating bearing bush.

8. The follow-up lead screw auxiliary support structure according to any one of claims 1-3, characterized in that: The number of the support assemblies is multiple, and the multiple support assemblies are integrally connected through a connecting rod.

Images