A two-way synchronous screw mechanism with independent adjustment

Abstract

This invention discloses a conveniently independently adjustable bidirectional synchronous screw mechanism, including a frame. At both ends of the upper part of the frame are sliders that can slide along a slide rail. A base is fixedly mounted on each slider, and a working component is mounted on the base. At the lower part of each slider are a first moving block force transmission base and a second moving block force transmission base. An annular nut is mounted on the first moving block force transmission base, and an adjustment component is mounted on the second moving block force transmission base. Together with the annular nut on the first moving block force transmission base, the second moving block force transmission base forms a threaded transmission pair with a screw fixed to a bearing seat on the frame, with the threads at both ends rotating in opposite directions. When the screw rotates, the sliders at both ends slide synchronously, thereby driving the working component on the slider to move forward and backward synchronously. The core feature of this mechanism is the adjustment component, which achieves precise positioning without the need for a slide mechanism. It is particularly suitable for applications with limited space requiring precise position adjustment, such as dual-power head, synchronous feed, or precision automatic centering fixtures.

Description

Technical Field

[0001] This invention relates to the field of automatic centering technology, and more specifically to a bidirectional synchronous screw mechanism that is convenient for independent adjustment. Background Technology

[0002] In existing applications of similar technologies, when precise alignment of the synchronous screw mechanism or flexible and precise simultaneous (or individual) position adjustment is required, a slide mechanism (or equivalent auxiliary mechanism) is usually added between the slider and the base. Precise position adjustment is achieved through the adjustment components of the slide mechanism, ultimately realizing the precise alignment of the working parts. However, this structure is costly, complex, and requires a large transfer space and auxiliary motion space range, which brings many inconveniences and shortcomings to applications with limited space. Summary of the Invention

[0003] The purpose of this invention is to provide a convenient and independently adjustable bidirectional synchronous screw mechanism. By adding an adjustment component to one end of the bidirectional synchronous screw mechanism, which allows for precise position adjustment by loosening a specific screw, the mechanism enables flexible and precise position adjustment of either end when precise alignment is required, thereby achieving the goal of precise alignment and solving the problems of high cost and limited space in existing structures.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A conveniently independently adjustable bidirectional synchronous screw mechanism includes a frame. Slide rail assemblies are symmetrically arranged at both ends of the top of the frame. Each slide rail assembly contains a slider that slides along the slide rail. A base is fixedly mounted on the slider, and a working component is mounted on the base. A bearing seat is provided on one side plate of the frame, and a bidirectional synchronous screw is rotatably connected to the bearing seat to limit the axial movement of the bidirectional synchronous screw relative to the frame. The threads at both ends of the bidirectional synchronous screw have opposite directions. The other end of the bidirectional synchronous screw extends through the frame to the other end. Moving block force transmission base one and moving block force transmission base two are respectively connected to the bottom of the sliders at both ends. One end of the bidirectional synchronous screw is threadedly connected to a ring nut, which is fixed to the moving block force transmission base one by screws. An adjustment component is provided at the other end of the bidirectional synchronous screw, and the adjustment component is mounted on the moving block force transmission base two. A manual adjustment handwheel is installed at one end of the bidirectional synchronous screw near the adjustment component, and a drive motor is installed at the other end.

[0006] As a further embodiment of the present invention: the frame has an inner cavity, and the top plates at both ends of the frame have a motion groove in the middle. The first moving block force transmission base and the second moving block force transmission base both extend into the inner cavity through the motion groove.

[0007] As a further aspect of the present invention: the adjusting assembly includes a bidirectional thrust ball bearing installed in a bearing position opened in the moving block force transmission base two. A locking end cover is tightly fitted to the outer end face of the bidirectional thrust ball bearing. The locking end cover is fixedly installed on the moving block force transmission base two by a screw. A ring nut two is threadedly connected to the end of the bidirectional synchronous lead screw away from the bearing seat. The inner end face of the locking end cover tightly adheres to and presses against the outer ring of the bidirectional thrust ball bearing. The tight ring of the bidirectional thrust ball bearing is installed on the nut sleeve. The nut sleeve is fitted onto the outer shaft surface of the ring nut two through the inner hole and locked at the end face by a screw. As a single unit, the outer circumference of the nut sleeve has an external thread and a stepped surface. A locking sleeve and a locking handwheel are threaded onto one end of the nut sleeve via a manual adjustment handwheel. One end of the locking sleeve presses the retaining ring of the double-acting thrust ball bearing against the stepped surface of the nut sleeve. The other end face is prevented from slipping by the screwing action of the locking handwheel. The locking handwheel has three radially protruding threaded holes, each containing a set screw. The locking handwheel, screwed onto the nut sleeve, presses against the end face of the locking sleeve, and the radially distributed set screws on the locking handwheel prevent slippage, thus forming a linked unit between the annular nut and the locking handwheel.

[0008] As a further aspect of the present invention: the method of using the mechanism is as follows:

[0009] When precisely adjusting the mirror image position of the working parts at both ends or the coordinates of any one of the working parts, loosening the screw in the adjusting assembly releases the clamping effect of the locking end cover on the outer ring of the double-direction thrust ball bearing. This allows the tight ring of the double-direction thrust ball bearing to freely rotate relative to the two outer rings around the axis. Rotating the locking handwheel creates relative rotation between the two annular nuts and the two-way synchronous lead screw, enabling precise adjustment of the position of the working part synchronized with the moving block force transmission base.

[0010] As a further aspect of the present invention: the working components include a precision fine-tuning dual-power head and a precision automatic centering fixture.

[0011] The beneficial effects of this invention are:

[0012] This invention, when the target action is not in the required position during synchronous forward and backward movement, slightly loosens the screw passing through the second moving block force transmission base. This reduces the pressure between the locking end cover and the moving ring of the bidirectional thrust ball bearing. The moving ring of the bidirectional thrust ball bearing reduces its clamping force on the ball bearing and relaxes the rotation restriction on the tight ring of the bidirectional thrust ball bearing. At this time, rotating the locking handwheel will drive the nut sleeve, which is locked as a whole with the tight ring of the bidirectional thrust ball bearing, to rotate relative to the bidirectional synchronous screw. This drives the second moving block force transmission base to move to the required position, and the linkage working parts achieve precise position adjustment. When the position display device (grating ruler) displays the correct data, the screw is locked, and the two ends are restored to the synchronous state. This allows for precise alignment when precise alignment is required, achieving the purpose of precise alignment by precisely adjusting one end of the bidirectional synchronous screw mechanism, without the need for a sliding plate mechanism, and is applicable to various spatial ranges. Attached Figure Description

[0013] The invention will now be further described with reference to the accompanying drawings.

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

[0015] Figure 2 This is a schematic diagram of the overall right-side structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the overall rear view structure of the present invention;

[0017] Figure 4 yes Figure 1 A magnified structural diagram of region A in the middle.

[0018] In the diagram: 1. Slider; 2. Base; 3. Working part; 4. Frame; 5. Motor mounting plate; 6. Bearing seat; 7. Moving block force transmission base one; 8. Ring nut one; 9. Bidirectional synchronous lead screw; 10. Slide rail; 11. Moving block force transmission base two; 12. Locking end cover; 13. Ring nut two; 14. Nut sleeve; 15. Bidirectional thrust ball bearing; 16. Locking sleeve; 17. Locking handwheel; 18. Manual adjustment handwheel; 19. Set screw; 20. Screw; 21. Grating ruler; 22. Drive motor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Synchronous feed, synchronous clamping, and similar applications are widely used in various industries. When precise alignment is required, the conventional method is to add a support plate mechanism (or equivalent auxiliary mechanism) to the slide block, assemble the working part onto the support plate mechanism, and achieve precise position adjustment through the adjustment device of the support plate mechanism, ultimately achieving precise alignment of the working part. However, this structure increases costs due to the need to add a support plate mechanism or similar device, and also increases the space required for machine placement and operation, bringing many inconveniences and shortcomings to applications with limited space. Without adding a support plate mechanism, the requirements for machining accuracy, assembly and debugging experience and ability are relatively high, which implicitly requires higher skill and time costs. The failure repair costs during use are also high, significantly increasing the overall manufacturing and use costs.

[0021] In view of this, such as Figures 1-4 As shown, this invention designs a convenient and independently adjustable bidirectional synchronous screw mechanism. By adding an adjustable component to the adjustment end of the bidirectional synchronous screw mechanism, when precise alignment is required, the working part at either end of the bidirectional synchronous screw mechanism can be precisely adjusted on the operating side to achieve the purpose of precise alignment. There is no need to use a support plate mechanism or equivalent auxiliary mechanism, and it is applicable to various spatial ranges.

[0022] like Figure 1 and Figure 2 As shown, the bidirectional synchronous screw mechanism of the present invention includes a frame 4, with slide rail groups symmetrically arranged at both ends of the upper part of the frame 4. Each slide rail group includes two slide rails 10 that are symmetrically arranged and cooperate with each other. A slider 1 that can slide along the slide rail 10 is arranged between the slide rails 10. The slide rail group can ensure that the slide rail 10 slides precisely in a straight line along the axis of the bidirectional synchronous screw 9. A base 2 is fixedly installed on the slider 1 by screws. A working part 3 is installed on the base 2, and the two working parts 3 are symmetrical about the working axis of the frame 4.

[0023] Further such as Figure 1 As shown, the frame 4 has an inner cavity. A bearing seat 6 is provided on the right side plate of the frame 4. A bidirectional synchronous screw 9 is rotatably connected to the bearing seat 6, restricting the bidirectional synchronous screw 9 from axial movement relative to the frame 4. The other end of the bidirectional synchronous screw 9 extends through the two side plates in the middle of the frame 4 into the right inner cavity. Since the bearing seat 6 is fixed on the frame 4, the bidirectional synchronous screw 9 can only rotate. A manual adjustment handwheel 18 is installed on one end of the bidirectional synchronous screw 9 near the adjustment component for easy manual adjustment, and a drive motor 22 is installed on the other end for automated control. The drive motor 22 is mounted on a motor fixing plate 5, which is locked to the right side plate of the frame 4. The entire mechanism can be manually or automatically controlled by setting the manual adjustment handwheel 18 and the drive motor 22.

[0024] Furthermore, the bottom of the two side sliders 1 are respectively connected to the moving block force transmission base 1 7 and the moving block force transmission base 2 11. The top plates on both sides of the frame 4 are provided with motion slots. The moving block force transmission base 1 7 and the moving block force transmission base 2 11 are both set through the motion slots. The moving block force transmission base 1 7 is connected to both ends of the bidirectional synchronous screw 9 through the annular nut 1 8 and the moving block force transmission base 2 11 is connected to both ends of the bidirectional synchronous screw 9 through the annular nut 2 13 of the adjustment component. The moving block force transmission base 1 7 is closer to the bearing seat 6. The two ends of the bidirectional synchronous screw 9 are provided with threads with the same lead and opposite rotation direction. The synchronous forward and backward movement of the working part 3 can be realized by the rotation of the bidirectional synchronous screw 9.

[0025] To facilitate independent adjustment of the bidirectional synchronous screw mechanism, such as Figure 1 and Figure 4As shown, an adjustment assembly is provided on the side of the bidirectional synchronous lead screw 9 away from the bearing housing 6. This adjustment assembly is located between the moving block force transmission base 2 11 and the bidirectional synchronous lead screw 9. The adjustment assembly includes a bidirectional thrust ball bearing 15 installed in a bearing position opened at the bottom of the moving block force transmission base 2 11. A locking end cover 12 is provided on the right side of the bidirectional thrust ball bearing 15. The locking end cover 12 is fixedly installed on the moving block force transmission base 2 11 by multiple evenly distributed screws 20. A ring nut 2 13 is threadedly connected to the end of the bidirectional synchronous lead screw 9 near the adjustment assembly. A nut sleeve 14 is sleeved on the outside of the ring nut 2 13, and the ring nut 2 13 and the nut sleeve 14 are connected by a... The end-face locking screws are connected as one piece. The outer small end of the nut sleeve 14 has an external thread and a stepped surface. A bearing seat is provided at the stepped surface. The inner end face of the locking end cover 12 tightly presses against and tightens the right ring of the double-direction thrust ball bearing 15. The nut sleeve 14 is threaded onto one end of the manual adjustment handwheel 18, with a locking sleeve 16 and a locking handwheel 17 connected by an external thread. The locking handwheel 17 has three radially protruding screw holes, each containing a set screw 19. The tight ring of the double-direction thrust ball bearing 15 is installed at the bearing seat of the nut sleeve 14 and is pressed against the stepped surface of the nut sleeve 14 by the locking sleeve 16. The locking handwheel 17, also screwed onto the nut sleeve 14, presses against and locks the end face of the locking sleeve 16. The anti-retraction function of the radially distributed set screws 19 on the handwheel 17 makes the annular nut 13 and the locking handwheel 17 form a linked whole; the two moving rings of the bidirectional thrust ball bearing 15 are locked by the screw 20 and respectively abut against the left end face of the locking end cover 12 and the bearing mounting end face of the moving block force transmission base 11, pressing the ball to limit the relative rotation between the moving ring and the tightened ring. At this time, the adjusting component is in an unadjustable state, equivalent to a nut sleeve connected to the external thread of the bidirectional synchronous screw 9 through the internal thread. Rotating the left and right ends of the bidirectional synchronous screw 9 realizes the synchronous forward and backward movement. When the synchronous forward and backward movement finds that the target movement is not in the required position, just loosen it slightly. The evenly distributed screws 20 reduce the clamping force of the locking end cover 12 on the moving ring of the double-direction thrust ball bearing 15, releasing the rolling restriction of the ball. Rotating the locking handwheel 17 will cause the ring nut 13 to rotate independently relative to the double-direction synchronous screw 9, thereby driving the working part linked with the moving block force transmission base 11 to move relative to the frame 4 to achieve position adjustment. Alternatively, rotating the handwheel 18 will cause the double-direction synchronous screw 9 to rotate, thereby driving the working part at the other end to achieve precise position adjustment. The adjustment amount and position coordinates are precisely displayed and controlled by the grating ruler 21. After adjustment, locking the screws 20 restores the synchronous working state at both ends. The entire mechanism has a compact structure and is convenient and quick to adjust.

[0026] In the description of this invention, it should be understood that the operating side described herein is by default the side where the handwheel or other adjustable components are located, but this is not a mandatory limitation on the location of the operating side; terms such as "upper," "lower," "left," and "right," indicating orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation, and therefore should not be construed as a limitation of the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electromechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A conveniently independently adjustable bidirectional synchronous screw mechanism, comprising a frame (4), wherein slide rail assemblies are symmetrically arranged at both ends of the upper part of the frame (4), the slide rail assemblies include a slider (1) that slides along the slide rail (10), a base (2) is fixedly installed on the slider (1), and a working part (3) is installed on the base (2), characterized in that, A bearing seat (6) is provided on one side plate of the frame (4). A bidirectional synchronous screw (9) is rotatably connected to the bearing seat (6) to limit the axial movement of the bidirectional synchronous screw (9) relative to the frame (4). The other end of the bidirectional synchronous screw (9) extends through the frame (4) to the other end of the frame (4). The bottom of the sliders (1) at both ends are respectively connected to the moving block force transmission base one (7) and the moving block force transmission base two (11). One end of the bidirectional synchronous screw (9) is threadedly connected to the ring nut one (8). The ring nut one (8) is fixed on the moving block force transmission base one (7) by screws. An adjustment component is provided at the other end of the bidirectional synchronous screw (9). The adjustment component is installed on the moving block force transmission base two (11). A manual adjustment handwheel (18) is installed on the end face of the bidirectional synchronous screw (9) near the adjustment component. A drive motor (22) is installed at the other end. The adjusting assembly includes a double-acting thrust ball bearing (15) installed in the bearing position of the moving block transmission base (11). A locking end cover (12) is provided on the outside of the double-acting thrust ball bearing (15). The locking end cover (12) is installed on the moving block transmission base (11) by multiple screws (20). A ring nut (13) is threaded to the end of the double-acting synchronous screw (9) away from the bearing seat (6). The inner end face of the locking end cover (12) is pressed against and squeezes the outer ring of the double-acting thrust ball bearing (15). The tight ring of the double-acting thrust ball bearing (15) is installed on the nut sleeve (14). The nut sleeve (14) is open to the outside of the bearing seat (11). The inner hole is fitted onto the outer shaft surface of the ring nut (13) and locked into place by screws on the end face to form a whole. The outer circle of the nut sleeve (14) has an external thread and a stepped surface. The nut sleeve (14) is connected to the locking sleeve (16) and the locking handwheel (17) by the external thread of the manual adjustment handwheel (18). One end of the locking sleeve (16) presses the tight ring of the double-direction thrust ball bearing (15) onto the stepped surface of the nut sleeve (14). The other end face is prevented from retracting by the screwing of the locking handwheel (17). The locking handwheel (17) has three screw holes in the radial direction, and set screws (19) are installed in the screw holes. The method of using this organization is as follows: When precisely adjusting the mirror position of the working parts (3) at both ends or the coordinate of any one of the working parts (3), loosen the screw (20) in the adjusting assembly to relax the clamping effect of the locking end cover (12) on the outer ring of the bidirectional thrust ball bearing (15). Then the tight ring of the bidirectional thrust ball bearing (15) and the two outer rings can freely rotate relative to each other around the axis. Rotating the locking handwheel (17) will form the relative rotation between the ring nut two (13) and the bidirectional synchronous screw (9), and precisely adjust the position of the working part (3) synchronized with the moving block force transmission base two (11).

2. The bidirectional synchronous screw mechanism for convenient independent adjustment according to claim 1, characterized in that, The frame (4) has an inner cavity, and the top plates at both ends of the frame (4) have a motion groove in the middle. The moving block force transmission base one (7) and the moving block force transmission base two (11) both extend into the inner cavity through the motion groove.

3. The bidirectional synchronous screw mechanism for convenient independent adjustment according to claim 1, characterized in that, The working component (3) includes a precision fine-tuning dual power head and a precision automatic centering fixture.

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