A flexible connection structure

Abstract

The utility model relates to a kind of flexible connecting structure, including first connecting block, second connecting block and two jackscrews;The side of first connecting block is provided with recess;First connecting block includes connecting portion and extension, the other side of connecting portion is connected with extension, extension is set in recess and is spaced apart with the inner wall of recess, the two sides of extension are all abutment surface, two abutment surfaces are sequentially arranged along the linear direction parallel to connecting screw rod, V-shaped groove is set on at least one abutment surface of extension;Two jackscrews opposite end all pass through the threaded hole set on first connecting block after being respectively abutted with two abutment surfaces, wherein, at least one jack screw is abutted with the two inclined planes of V-shaped groove;When first connecting block slides to the position where error exists on screw rod, relative motion exists between first connecting block and second connecting block, when jack screw slides relative to V-shaped groove, the relative movement between first connecting block and second connecting block can be provided with space.

Description

Technical Field

[0001] This utility model relates to the technical field of lead screw and guide rail connection structure, and in particular to a flexible connection structure. Background Technology

[0002] In mechanical transmission, lead screws and guides are commonly used combined structures. As the precision requirements of equipment and instruments increase, the transmission precision requirements for lead screws and guides also increase, aiming for high-precision transmission. The requirements for precision transmission include high transmission accuracy, good repeatability, small backlash error, and low noise. For example... Figure 1 As shown, the lead screw and guide rail are currently connected by a rigid connecting block. The rotation of the lead screw drives the rigid connecting block to move along the length of the lead screw, thereby causing the guide rail connected to it to slide synchronously.

[0003] Ideally, the lead screw axis and the guide rail axis are parallel in all directions, and the distance between them is equal throughout the entire stroke. However, in reality, there are variations such as yaw angle, pitch angle, distance error, and manufacturing errors of the lead screw itself between the lead screw and the guide rail. Figure 2-5 As shown, the above errors originate from processing errors and assembly errors. Due to the root causes and randomness of the errors, they can only be reduced, not eliminated.

[0004] Due to machining and assembly errors, the lead screw and guide rail components are subjected to horizontal and / or vertical tension during transmission, and the magnitude of this tension varies irregularly. This can lead to motor overload alarms, increased noise, and even abnormal whistling sounds. After prolonged operation, the overall lifespan of the structure is reduced. Utility Model Content

[0005] In view of this, it is necessary to provide a flexible connection structure to address the problem that, due to limitations imposed by machining and assembly errors, the lead screw and guide rail components are subjected to horizontal and / or vertical tension during transmission, and the magnitude of this tension varies irregularly. This can lead to motor overload alarms, increased noise, and even abnormal whistling sounds, and ultimately, a reduced lifespan of the entire structure after prolonged operation.

[0006] This utility model provides a flexible connection structure for connecting a lead screw and a guide rail, including a first connecting block, a second connecting block, and two set screws. A groove is formed on one side of the first connecting block, and the other side is used to connect the lead screw. The second connecting block includes a connecting portion and an extension portion. One side of the connecting portion is used to connect the guide rail, and the other side of the connecting portion is connected to the extension portion. The extension portion is disposed within the groove and spaced apart from the inner wall of the groove. Both sides of the extension portion are abutment surfaces, and the two abutment surfaces are arranged sequentially along a straight line parallel to the connecting lead screw. At least one abutment surface of the extension portion has a V-shaped groove. The two set screws are respectively disposed on both sides of the first connecting block, and the opposite ends of the two set screws pass through threaded holes in the first connecting block and abut against the two abutment surfaces respectively. At least one set screw abuts against the two inclined surfaces of the V-shaped groove to allow relative movement between the first connecting block and the second connecting block.

[0007] Furthermore, the first connecting block has a threaded hole for engaging with the lead screw.

[0008] Furthermore, the connecting portion and the extension portion are two block-shaped structures arranged perpendicularly to each other.

[0009] Furthermore, the number of V-grooves is one, wherein one set screw abuts against two inclined surfaces of the V-grooves on one of the abutting surfaces, and the other set screw abuts against the other abutting surface.

[0010] Furthermore, there are two V-grooves, which are respectively disposed on the two abutting surfaces, and the two set screws abut against the two inclined surfaces of the two V-grooves respectively.

[0011] Furthermore, the set screw includes a rod body and a spherical end. The rod body is connected to a threaded hole on the first connecting block. The end of the rod body located in the groove is connected to the spherical end, and the spherical end abuts against the two inclined surfaces of the V-shaped groove.

[0012] Furthermore, the set screw includes a top sleeve, a spring, and a top ball. The top sleeve is connected to a threaded hole on the first connecting block. One end of the top sleeve has an installation cavity that communicates with the groove. The spring is built into the installation cavity. One end of the spring is fixedly connected to the inner bottom wall of the top sleeve, and the other end of the spring is fixedly connected to the top ball. The top ball abuts against the two inclined surfaces of the V-shaped groove.

[0013] Furthermore, the V-groove extends in a direction perpendicular to the connecting lead screw.

[0014] Furthermore, the second connecting block has a through hole for the screw to pass through.

[0015] Furthermore, the two contact surfaces are mutually parallel planes.

[0016] Compared with the prior art, the first connecting block and the second connecting block are respectively installed on the lead screw and the guide rail. The first connecting block and the second connecting block are flexibly connected by two set screws. Specifically, as the lead screw rotates, the first connecting block, the second connecting block and the guide rail slide synchronously in a direction parallel to the lead screw. When the first connecting block slides to a position on the lead screw where there is an error, there is relative movement between the first connecting block and the second connecting block. Since at least one set screw is always in contact with the V-groove, the set screw slides relative to the V-groove at this time, and the extension is spaced apart from the inner wall of the groove, which can provide space for the relative movement between the first connecting block and the second connecting block, avoiding the lead screw and guide rail components from being subjected to horizontal and / or vertical tensile forces due to errors, and improving the service life of the lead screw, guide rail and connecting structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a rigid connection method for a lead screw and guide rail;

[0018] Figure 2 for Figure 1 A front view showing yaw and pitch angle errors between the lead screw and the guide rail;

[0019] Figure 3 for Figure 1 A side view showing yaw and pitch angle errors between the lead screw and the guide rail;

[0020] Figure 4 for Figure 1 A schematic diagram showing the structure with spacing error between the lead screw and the guide rail;

[0021] Figure 5 for Figure 1 A schematic diagram showing a structure with manufacturing errors between the lead screw and the guide rail;

[0022] Figure 6 This is a schematic diagram of the overall structure of the flexible connection structure provided in the embodiment of this utility model;

[0023] Figure 7 for Figure 6 Enlarged diagram of section A in the middle;

[0024] Figure 8 for Figure 6 A schematic diagram of the connection between the second connecting block and the set screw;

[0025] Figure 9 for Figure 8 A schematic diagram of a structure with a V-shaped groove on the second connecting block;

[0026] Figure 10 for Figure 8 A schematic diagram of the structure with two V-shaped grooves on the second connecting block;

[0027] Figure 11 for Figure 8 A schematic diagram of the structure of the center set screw without a spring;

[0028] Figure 12 for Figure 8 A schematic diagram of the structure of the center set screw with a spring;

[0029] Figure 13 for Figure 6 Installation diagram of the lead screw and guide rail. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0031] like Figure 1 As shown, the lead screw 100 and the guide rail 200 are connected by a rigid connecting block. Ideally, the axis of the lead screw 100 and the axis of the guide rail 200 are parallel in all directions, and the distance between them is equal throughout the entire stroke. However, in reality, there are yaw angle, pitch angle, distance error, and manufacturing errors of the lead screw 100 itself between the lead screw 100 and the guide rail 200. Figure 2-3 As shown, there are yaw and pitch angles between the lead screw 100 and the guide rail 200. Of course, there are also cases where there is only yaw or pitch angle between the lead screw 100 and the guide rail 200; for example... Figure 4 As shown, there is a gap error between the lead screw 100 and the guide rail 200; for example Figure 5 As shown, there is a manufacturing error between the lead screw 100 and the guide rail 200. With the rigid connecting block, the lead screw 100 and the guide rail 200 are subjected to horizontal and / or vertical tensile forces, and the magnitude of these forces varies irregularly, generating significant noise and affecting the overall lifespan of the structure. To address these problems, this embodiment of the invention provides a flexible connection structure.

[0032] like Figure 6-8As shown in the figure, this utility model provides a flexible connection structure for connecting a lead screw 100 and a guide rail 200, including a first connecting block 300, a second connecting block 400, and two set screws 500; a groove 310 is formed on one side of the first connecting block 300, and the other side of the first connecting block 300 is used to connect the lead screw 100; the second connecting block 400 includes a connecting portion 410 and an extension portion 420, one side of the connecting portion 410 is used to connect the guide rail 200, and the other side of the connecting portion 410 is connected to the extension portion 420, the extension portion 420 is disposed in the groove 310 and is connected to the groove 310. The inner wall of the extension 420 is spaced apart, and both sides of the extension 420 are abutment surfaces. The two abutment surfaces are arranged sequentially along a straight line parallel to the connecting screw 100. At least one abutment surface of the extension 420 is provided with a V-shaped groove 40a. Two set screws 500 are respectively provided on both sides of the first connecting block 300, and the opposite ends of the two set screws 500 pass through the threaded holes opened on the first connecting block 300 and abut against the two abutment surfaces respectively. At least one set screw 500 abuts against the two inclined surfaces of the V-shaped groove 40a so as to allow the first connecting block 300 and the second connecting block 400 to move relative to each other.

[0033] In implementation, the first connecting block 300 and the second connecting block 400 are respectively installed on the lead screw 100 and the guide rail 200. The first connecting block 300 and the second connecting block 400 are flexibly connected by two set screws 500. Specifically, as the lead screw 100 rotates, the first connecting block 300, the second connecting block 400, and the guide rail 200 slide synchronously in a direction parallel to the lead screw 100. When the first connecting block 300 slides to a position on the lead screw 100 where there is an error, the first connecting block 300 and the second connecting block 400... There is relative movement between the connecting blocks 400. Since at least one set screw 500 is always in contact with the V-groove 40a, the set screw 500 slides relative to the V-groove 40a. The extension 420 is spaced apart from the inner wall of the groove 310, which can provide space for the relative movement between the first connecting block 300 and the second connecting block 400. This avoids the screw 100 and guide rail 200 from being subjected to horizontal and / or vertical tension due to errors, thereby improving the service life of the screw 100, guide rail 200 and connecting structure.

[0034] In this embodiment, the first connecting block 300 is provided with a threaded hole for connecting with the lead screw 100.

[0035] In this embodiment, the second connecting block 400 is used to connect with the guide rail 200.

[0036] In one embodiment, the second connecting block 400 has a through hole for a screw to pass through. The screw passes through the second connecting block 400 and connects to the guide rail 200, thereby fixing the second connecting block 400 to the guide rail 200. Of course, other connection methods can also be used, such as snap-fit ​​connections, etc., and there is no limitation on this.

[0037] In one embodiment, the connecting portion 410 and the extension portion 420 are two block-shaped structures arranged perpendicularly to each other. Of course, in other preferred embodiments, the connecting portion 410 and the extension portion 420 may also adopt other shapes.

[0038] In this embodiment, two set screws 500 are used to connect the first connecting block 300 and the second connecting block 400. Specifically, the two set screws 500 are respectively disposed on both sides of the first connecting block 300, and the opposite ends of the two set screws 500 pass through the threaded holes opened on the first connecting block 300 and abut against the two abutting surfaces respectively. At least one set screw 500 abuts against the two inclined surfaces of the V-groove 40a so as to allow the first connecting block 300 and the second connecting block 400 to move relative to each other.

[0039] Among them, the two contact surfaces are parallel planes, and the V-groove 40a extends in a direction perpendicular to the connecting screw 100.

[0040] The second connecting block 400 can be clamped by two opposing set screws 500. At the same time, under the abutment of the set screws 500 and the V-groove 40a, the set screws 500 can slide relative to each other around the V-groove 40a. It can be understood that the number of V-grooves 40a can be set to one or two.

[0041] like Figure 9 As shown, in one embodiment, there is one V-groove 40a, wherein one set screw 500 abuts against two inclined surfaces of the V-groove 40a on one abutting surface, and another set screw 500 abuts against another abutting surface.

[0042] like Figure 10 As shown, in another embodiment, there are two V-grooves 40a, which are respectively disposed on two abutting surfaces, and two set screws 500 abut against the two inclined surfaces of the two V-grooves 40a respectively.

[0043] The set screw 500 can be either springless or spring-loaded, and will be described below with different embodiments.

[0044] like Figure 11 As shown, in one embodiment, the set screw 500 includes a rod body and a spherical end. The rod body is connected to a threaded hole on the first connecting block 300. The end of the rod body located in the groove 310 is connected to the spherical end, and the spherical end abuts against the two inclined surfaces of the V-groove 40a.

[0045] like Figure 12As shown, in another embodiment, the set screw 500 includes a top sleeve 510, a spring 520, and a top ball 530. The top sleeve 510 is connected to a threaded hole on the first connecting block 300. One end of the top sleeve 510 has a mounting cavity 511 with a communicating groove 310. The spring 520 is built into the mounting cavity 511. One end of the spring 520 is fixedly connected to the inner bottom wall of the top sleeve 510, and the other end of the spring 520 is fixedly connected to the top ball 530. The top ball 530 abuts against the two inclined surfaces of the V-groove 40a.

[0046] It is understandable that both set screws 500 can be springless; one set screw 500 can be springless and the other set screw 500 can be spring-loaded; of course, both set screws 500 can also be spring-loaded.

[0047] like Figure 13 As shown, the first connecting block 300 can move along the length of the lead screw 100 under the rotation of the lead screw 100. It can be understood that the lead screw 100 and the guide rail 200 can be set on the worktable. Specifically, the lead screw 100 is rotatably connected to the worktable and can be driven to rotate under the action of the motor. At the same time, the guide rail 200 is slidably connected to the worktable. Therefore, the first connecting block 300 will not rotate circumferentially with the lead screw 100 under the limiting effect of the second connecting block 400.

[0048] Compared with the prior art: the first connecting block 300 and the second connecting block 400 are respectively installed on the lead screw 100 and the guide rail 200. The first connecting block 300 and the second connecting block 400 are flexibly connected by two set screws 500. Specifically, as the lead screw 100 rotates, the first connecting block 300, the second connecting block 400 and the guide rail 200 slide synchronously in a direction parallel to the lead screw 100. When the first connecting block 300 slides to a position on the lead screw 100 where there is an error, the first connecting block 300 and the second connecting block 400... There is relative movement between the two connecting blocks 400. Since at least one set screw 500 is always in contact with the V-groove 40a, the set screw 500 slides relative to the V-groove 40a. The extension 420 is spaced apart from the inner wall of the groove 310, which can provide space for the relative movement between the first connecting block 300 and the second connecting block 400. This avoids the screw 100 and guide rail 200 from being subjected to horizontal and / or vertical tension due to errors, thereby improving the service life of the screw 100, guide rail 200 and connecting structure.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flexible connection structure, characterized in that, Used to connect lead screws and guide rails, including: The first connecting block has a groove on one side, and the other side of the first connecting block is used to connect the lead screw. The second connecting block includes a connecting part and an extension part. One side of the connecting part is used to connect to the guide rail, and the other side of the connecting part is connected to the extension part. The extension part is disposed in the groove and spaced apart from the inner wall of the groove. Both sides of the extension part are abutting surfaces. The two abutting surfaces are arranged sequentially along a straight line parallel to the connecting screw. At least one abutting surface of the extension part is provided with a V-shaped groove. Two set screws are respectively disposed on both sides of the first connecting block, and the opposite ends of the two set screws pass through the threaded holes opened on the first connecting block and abut against the two abutting surfaces respectively. At least one set screw abuts against the two inclined surfaces of the V-shaped groove, so as to allow the first connecting block and the second connecting block to move relative to each other.

2. The flexible connection structure according to claim 1, characterized in that, The first connecting block has a threaded hole for connecting with the lead screw.

3. The flexible connection structure according to claim 1, characterized in that, The connecting part and the extension part are two block-shaped structures arranged perpendicularly to each other.

4. The flexible connection structure according to claim 1, characterized in that, The number of V-grooves is one, wherein one set screw abuts against the two inclined surfaces of the V-grooves on one of the abutting surfaces, and the other set screw abuts against the other abutting surface.

5. The flexible connection structure according to claim 1, characterized in that, The number of V-grooves is two, and the two V-grooves are respectively disposed on the two abutting surfaces. The two set screws abut against the two inclined surfaces of the two V-grooves respectively.

6. The flexible connection structure according to claim 1, characterized in that, The set screw includes a rod body and a spherical end. The rod body is connected to a threaded hole on the first connecting block. The end of the rod body located in the groove is connected to the spherical end, and the spherical end abuts against the two inclined surfaces of the V-shaped groove.

7. The flexible connection structure according to claim 1, characterized in that, The set screw includes a top sleeve, a spring, and a top ball. The top sleeve is connected to a threaded hole on the first connecting block. One end of the top sleeve has an installation cavity that communicates with the groove. The spring is built into the installation cavity. One end of the spring is fixedly connected to the inner bottom wall of the top sleeve, and the other end of the spring is fixedly connected to the top ball. The top ball abuts against the two inclined surfaces of the V-shaped groove.

8. The flexible connection structure according to claim 1, characterized in that, The V-groove extends in a direction perpendicular to the connecting screw.

9. The flexible connection structure according to claim 1, characterized in that, The second connecting block has a through hole for screws to pass through.

10. The flexible connection structure according to claim 1, characterized in that, The two contact surfaces are parallel planes.

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