Opposite vertex type lead screw adjusting mechanism

Abstract

The utility model discloses an opposite vertex type lead screw adjusting mechanism which comprises a guide rail and a sliding seat capable of sliding along the guide rail, a rotatable adjusting lead screw is installed on the guide rail, an adjusting nut is fixedly arranged on the sliding seat, and the adjusting lead screw is in threaded fit with the adjusting nut. When the adjusting lead screw rotates in the adjusting nut, the sliding seat is driven to slide along the guide rail; the sliding seat is further provided with an opposite ejecting assembly, and the opposite ejecting assembly abuts against the end of the adjusting lead screw, so that threads of the adjusting lead screw are tightly attached to threads of the adjusting nut after being subjected to ejecting force. The opposite-vertex assembly comprises an opposite-vertex lead screw and an opposite-vertex nut which are in threaded fit, the opposite-vertex nut is fixed to the sliding base, and the opposite-vertex lead screw can rotate in the opposite-vertex nut to abut against the adjusting lead screw. The opposite-vertex lead screw and the adjusting lead screw are connected and fixed through a locking piece. The problem that gaps exist between threads of the adjusting lead screw and the adjusting nut can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw adjustment mechanisms, in particular to a top-to-top screw adjustment mechanism. Background Art

[0002] Before manufacturing graphite packing rings from graphite ribbon, it's sometimes necessary to cut the ribbon to the desired width. The current cutting method involves passing the ribbon over a guide pulley and then over a cutting tool, which then cuts the side edges of the ribbon. In actual production, it was discovered that because the cutting tool's position is adjusted via a screw adjustment mechanism, and there's a certain gap between the screw and the nut in this mechanism, the cutting tool is unstable during operation and experiences slight wobbling, resulting in variations in the width of the ribbon's various sections. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a top-to-top screw adjustment mechanism to address the problem of a gap between the screw threads of the adjusting screw and the adjusting nut.

[0004] Technical solution: In order to achieve the above-mentioned purpose, the utility model provides a top-type screw adjustment mechanism, including a guide rail and a sliding seat that can slide along the guide rail. A rotatable adjusting screw is installed on the guide rail, and an adjusting nut is fixedly provided on the sliding seat. The adjusting screw and the adjusting nut are threaded together; when the adjusting screw rotates in the adjusting nut, it drives the sliding seat to slide along the guide rail; a top assembly is also provided on the sliding seat, and the top assembly presses against the end of the adjusting screw, so that the threads of the adjusting screw are pressed against the threads of the adjusting nut after being subjected to a top thrust.

[0005] Furthermore, the jacking assembly includes a jacking screw and a jacking nut that are threaded together. The jacking nut is fixed on the sliding seat, and the jacking screw can rotate in the jacking nut until it presses against the adjusting screw.

[0006] Furthermore, the counter-threaded screw and the adjusting screw are connected and fixed via a locking member; when the adjusting screw rotates in the adjusting nut, the counter-threaded screw can be driven to rotate synchronously in the counter-threaded nut.

[0007] Furthermore, the pitch of the top lead screw is consistent with that of the adjusting lead screw.

[0008] Furthermore, the counter-thread screw and the adjusting screw are in the same straight line; a pin is provided at the end of the counter-thread screw, and a socket is provided at the end of the adjusting screw. When the counter-thread screw is pressed against the end of the adjusting screw, the pin is correspondingly inserted into the socket; the locking piece is a locking screw, and a locking screw hole is provided on the adjusting screw. The locking screw hole and the socket are connected to each other, and the locking screw is screwed into the locking screw hole and nailed to the pin.

[0009] Furthermore, the depth of the insertion hole is greater than the length of the pin.

[0010] Furthermore, the outer diameter of the plug is consistent with the inner diameter of the insertion hole; the surface of the plug is densely covered with a plurality of nail pits, so that the locking screw can be nailed on the nail pits of the plug.

[0011] Furthermore, a fixed support is provided on the guide rail, and a rotating hole is opened on the fixed support; an end of the adjusting screw away from the top screw is connected to a crank, and the crank rotates in cooperation with the rotating hole.

[0012] Beneficial effect: The utility model is a top-type screw adjustment mechanism, which is provided with a top screw. The top screw can support the front end of the adjusting screw, so that the screw threads of the adjusting screw are pressed against the screw threads of the adjusting nut after being subjected to a top thrust, thereby preventing the sliding seat from shaking relative to the adjusting screw; therefore, when a cutting tool is installed on the sliding seat, shaking of the cutting tool can also be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 This is a schematic diagram of the top screw and the adjusting screw being separated;

[0014] Attachment Figure 2 This is a schematic diagram of the counter screw pressing against the adjusting screw. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] As attached Figure 1 The described top-to-top screw adjustment mechanism includes a guide rail 1 and a sliding seat 2. The sliding seat 2 is installed on the guide rail 1. A sliding groove is provided at the bottom of the sliding seat 2. The sliding groove slides with the guide rail 1 so that the sliding seat 2 can slide along the guide rail 1. A rotatable adjustment screw 3 is also installed on the guide rail 1. The length direction of the adjustment screw 3 is consistent with the extension direction of the guide rail 1. An adjustment nut 4 is provided on the sliding seat 2, and the adjustment nut 4 is fixed on the sliding seat 2. There is an external thread structure on the adjustment screw 3, and an internal thread structure inside the adjustment nut 4. The adjustment screw 3 and the adjustment nut 4 are threadedly matched. When the adjustment screw 3 rotates in the adjustment nut 4, the adjustment nut 4 is displaced along the length direction of the adjustment screw 3, thereby driving the sliding seat 2 to slide along the guide rail 1.

[0017] In actual use, to ensure that the adjusting screw 3 can rotate smoothly within the adjusting nut 4, a certain gap exists between the adjusting screw 3 and the adjusting nut 4. That is, the width of the screw groove in the adjusting nut 4 is slightly larger than the thickness of the thread 5 on the adjusting screw 3. As a result, the adjusting nut 4 can wobble relative to the adjusting screw 3. Since the adjusting nut 4 is fixed to the sliding seat 2, the sliding seat 2 will also wobble relative to the adjusting screw 3. If a cutting tool is installed on the sliding seat 2, the cutting tool cannot maintain stability during cutting operations, resulting in poor quality of the processed product.

[0018] In order to deal with the above problems, the present invention improves the existing screw adjustment mechanism. In the present invention, a top assembly is also provided on the sliding seat 2, and the top assembly abuts against the end of the adjusting screw 3, as shown in the attached Figure 2 As shown in FIG, after the screw threads 5 of the adjusting screw 3 are subjected to a thrust force, the screw threads 5 of the adjusting screw 3 will cling tightly to the screw threads 5 of the adjusting nut 4. That is, the screw threads 5 of the adjusting screw 3 will cling tightly to the groove wall of the adjusting nut 4, thereby maintaining the stability of the sliding seat 2 on the guide rail 1 and preventing the sliding seat 2 from shaking. When a cutting tool is mounted on the sliding seat 2, this also prevents the cutting tool from shaking during cutting operations.

[0019] Specifically, the top assembly includes a top screw 6 and a top screw nut 7 that are threaded together. The top screw nut 7 is fixed on the sliding seat 2. The top screw nut 7 has an internal thread structure, and the top screw 6 has an external thread structure. The top screw nut 7 and the top screw 6 are threaded together. Figure 2 As shown in FIG, the jacking screw 6 can rotate in the jacking nut 7 until it contacts the end of the adjusting screw 3, causing the sliding seat 2 to move a short distance toward the side where the jacking screw 6 is located, thereby making the screw threads 5 on the adjusting screw nut 4 and the screw threads 5 on the adjusting screw 3 tightly contact each other. Correspondingly, the screw threads 5 on the jacking nut 7 will also tightly contact each other with the screw threads 5 on the jacking screw 6.

[0020] The jacking screw 6 is fixedly connected to the adjusting screw 3 via a locking member. When the adjusting screw 3 rotates in the adjusting screw nut 4, the adjusting screw 3 can also drive the jacking screw 6 to rotate synchronously in the jacking screw nut 7. As a result, there is no need to rotate the adjusting screw 3 and the jacking screw 6 separately, which simplifies the operation and makes the jacking screw adjustment mechanism of the utility model more convenient to use.

[0021] The pitch of the top screw 6 is consistent with that of the adjusting screw 3, ensuring that the adjusting screw 3 and the top screw 6 can rotate synchronously.

[0022] The counter screw 6 is in the same straight line as the adjusting screw 3. A pin 8 is provided at the center of the end of the counter screw 6, and a socket 9 is provided at the center of the end of the adjusting screw 3. When the counter screw 6 is pressed against the end of the adjusting screw 3, the pin 8 is correspondingly inserted into the socket 9. The locking member is a locking screw 10, and a locking screw hole 11 is provided on the adjusting screw 3. The locking screw hole 11 is connected to the socket 9, and the locking screw hole 11 and the socket 9 are perpendicular to each other, and the locking screw 10 is threadedly matched with the locking screw hole 11. The locking screw 10 can be screwed into the locking screw hole 11, and the front end of the locking screw 10 extends into the socket 9 and is nailed on the pin 8, thereby clamping the pin 8 in the socket 9 to prevent the pin 8 from being separated from the socket 9.

[0023] The depth of the insertion hole 9 is greater than the length of the pin 8, so that the end of the adjusting screw 3 and the end of the counter screw 6 can be relatively pressed together.

[0024] The outer diameter of the latch pin 8 is consistent with the inner diameter of the insertion hole 9, so the latch pin 8 does not wobble within the insertion hole 9. In one embodiment, the surface of the latch pin 8 is densely covered with a plurality of nail pits. After the front end of the locking screw 10 is inserted into the insertion hole 9, the nails are inserted into the nail pits of the latch pin 8, thereby locking the latch pin 8 and preventing the latch pin 8 from rotating within the insertion hole 9. As a result, when the adjusting screw 3 rotates, it can drive the opposing screw 6 to rotate together.

[0025] The guide rail 1 is also provided with a fixed support 12, which has a rotation hole. The end of the adjusting screw 3, away from the counter screw 6, has a crank 13, which is fixedly connected to the counter screw 6. The crank 13 rotates in conjunction with the rotation hole and has a retaining structure to prevent it from moving back and forth relative to the rotation hole. A hexagonal hole is also provided at one end of the counter screw 6, into which a hexagonal wrench can be inserted, making it easier to rotate the counter screw 6 until it contacts the adjusting screw 3.

[0026] The working mode of the top-to-top screw adjustment mechanism of the present invention is as follows: Figure 1 As shown in the figure, screw the top screw 6 into the top screw nut 7, and tighten the top screw 6 and the adjusting screw 3 so that the top screw 6 and the adjusting screw 3 are tightly pressed together. Figure 2 As shown in the figure, the thread 5 of the adjusting screw 3 will be close to the thread 5 of the adjusting nut 4, and the thread 5 of the counter screw 6 will be close to the thread 5 of the counter nut 7; then the locking screw 10 is screwed into the locking screw hole 11, so that the locking screw 10 is nailed on the pin 8, and then the adjusting screw 3 and the counter screw 6 can be rotated by the crank 13, which is convenient for operation, and the sliding seat 2 will not shake on the guide rail 1.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A top-to-top screw adjustment mechanism, characterized in that: The invention comprises a guide rail (1) and a sliding seat (2) capable of sliding along the guide rail (1); a rotatable adjusting screw (3) is installed on the guide rail (1); an adjusting nut (4) is fixedly provided on the sliding seat (2); the adjusting screw (3) and the adjusting nut (4) are threadedly matched; when the adjusting screw (3) rotates in the adjusting nut (4), the sliding seat (2) is driven to slide along the guide rail (1); a top assembly is also provided on the sliding seat (2); the top assembly abuts against the end of the adjusting screw (3), so that the screw thread (5) of the adjusting screw (3) is subjected to a top thrust and then closely abuts against the screw thread (5) of the adjusting nut (4).

2. The top-to-top screw adjustment mechanism according to claim 1, characterized in that: The top assembly comprises a top screw (6) and a top screw nut (7) that are threaded together. The top screw nut (7) is fixed on the sliding seat (2). The top screw (6) can rotate in the top screw nut (7) until it contacts the adjusting screw (3).

3. The top-to-top screw adjustment mechanism according to claim 2, characterized in that: The counter screw (6) and the adjusting screw (3) are connected and fixed via a locking member; when the adjusting screw (3) rotates in the adjusting nut (4), it can drive the counter screw (6) to rotate synchronously in the counter screw nut (7).

4. The top-to-top screw adjustment mechanism according to claim 3, characterized in that: The pitch of the top screw (6) is consistent with that of the adjusting screw (3).

5. The top-to-top screw adjustment mechanism according to claim 3, characterized in that: The top screw (6) and the adjusting screw (3) are on the same straight line; a latch (8) is provided at the end of the top screw (6), and a socket (9) is provided at the end of the adjusting screw (3); when the top screw (6) is pressed against the end of the adjusting screw (3), the latch (8) is correspondingly inserted into the socket (9); the locking member is a locking screw (10), a locking screw hole (11) is provided on the adjusting screw (3), the locking screw hole (11) and the socket (9) are communicated with each other, and the locking screw (10) is screwed into the locking screw hole (11) and then nailed on the latch (8).

6. The top-to-top screw adjustment mechanism according to claim 5, characterized in that: The depth of the insertion hole (9) is greater than the length of the latch (8).

7. The top-to-top screw adjustment mechanism according to claim 5, characterized in that: The outer diameter of the latch (8) is consistent with the inner diameter of the insertion hole (9); the surface of the latch (8) is densely covered with a plurality of nail pits, so that the locking screw (10) can be nailed on the nail pits of the latch (8).

8. The top-to-top screw adjustment mechanism according to any one of claims 2 to 7, characterized in that: The guide rail (1) is further provided with a fixed support (12), and a rotation hole is provided on the fixed support (12); an end of the adjusting screw (3) away from the top screw (6) is connected to a crank (13), and the crank (13) is rotatably matched with the rotation hole.

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