Double-thread stroke fine adjustment mechanism
By using a double-thread stroke fine-tuning mechanism in the fine-tuning structure, using threads and limit block designs with different thread pitches, the problem of small adjustment range and low accuracy in large structures is solved, and low-cost and high-precision large stroke adjustment is achieved. Meet the adjustment needs of large structures.
Patent Information
- Application Number
- CN202420661221.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-01
AI Technical Summary
The existing fine-tuning structure has a small adjustment range, low accuracy and high cost in large structures, making it difficult to meet the low-cost and accurate adjustment requirements of large structures.
A double thread stroke fine-tuning mechanism is designed. By providing a first thread and a second thread of different pitches on the adjustment screw, the thread pitch difference is used to realize the up and down movement of the movable block, the adjustment range is large, the cost is low, and the limit is limited. The split structure of the position block and the nut seat is fixed to achieve accurate fine adjustment.
It realizes low-cost, easy installation and high-precision fine-tuning of large stroke adjustment to meet the adjustment needs of large structures. The adjustment amount of rotation is determined by the thread pitch difference, and the accuracy can reach 0.01mm.
Smart Images
Figure CN222277400U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of long-distance length measurement and adjustment tools, in particular to a double-thread stroke fine-tuning mechanism. Background Art
[0002] The stroke fine-tuning structure is mostly used in occasions where small adjustments are made during industrial production, such as micro-feeding, precision debugging, and fine-tuning of precision instruments. In the prior art, standard knob micrometers are mostly used to achieve precise position fine-tuning. The accuracy of the micrometer can reach 0.01mm, but for large structures, the adjustment range of the existing fine-tuning structure is small and it is difficult to fix; the adjustment range is large, the accuracy is not high, and the cost is very high. For large structures, there is no low-cost and precise adjustment structure. Utility Model Content
[0003] In order to overcome the deficiencies of the prior art, the utility model aims to provide a double-thread stroke fine-tuning mechanism which can simultaneously achieve the three functions of large stroke, low cost and easy installation.
[0004] To solve the above problems, the technical solution adopted by the utility model is as follows: a double-thread stroke fine-tuning mechanism, characterized in that it includes a fixed seat, a movable block and an adjusting screw, the movable block is clamped with the fixed seat, a threaded hole is provided on the movable block, the adjusting screw is screwed into the threaded hole and connected with the movable block, a first thread and a second thread are provided on the adjusting screw, the first thread and the second thread are located at two ends of the adjusting screw, the pitches of the first thread and the second thread are different, the first thread is connected to the nut seat, the second thread is connected to the movable block, and the adjusting screw can rotate clockwise or counterclockwise to drive the movable block to move up and down.
[0005] Compared with the prior art, the beneficial effect of the utility model is that: the adjusting screw is provided with threads with different pitches, and when the adjusting screw rotates, it can drive the movable block to move up and down, and fine-tuning is achieved by rotating clockwise and counterclockwise in the mechanism through two sections with different pitch differences, that is, the adjustment amount of one rotation is determined by the pitch difference of the two sections of threads. This structure not only has low cost, but also has a large adjustment range and is easy to fix. Most importantly, it can meet the large-stroke adjustment of large structures.
[0006] In the above-mentioned fine-tuning mechanism, a slot is provided on the fixing seat, the movable block is connected to the slot and the movable block can move up and down along the slot.
[0007] The above-mentioned fine-tuning mechanism also includes an adjustment block bracket, which is fixed to the upper end surface of the fixing seat. The adjustment block bracket is provided with a through hole, and the adjustment screw is screwed into the through hole to engage with the movable block.
[0008] In the above-mentioned fine-tuning mechanism, the adjusting block bracket is provided with a groove, and a through hole is provided inside the groove.
[0009] In the above-mentioned fine-tuning mechanism, the nut seat is a split structure, the nut seat is fixed to the upper end surface of the adjustment block bracket, and a threaded hole is provided on the nut seat. The adjustment screw is screwed into the threaded hole to engage with the movable block.
[0010] The above-mentioned fine-tuning mechanism also includes a limit block, which is used to prevent the movable block from moving forward and backward, and the limit block is connected to the fixed seat.
[0011] In the above-mentioned fine-tuning mechanism, threaded holes are provided on the limit block and the fixing seat, and the limit block is connected to the fixing seat by screws.
[0012] In the above-mentioned fine-tuning mechanism, the first thread is made of M12*1.5, and the second thread is made of M10*1.25.
[0013] In the above-mentioned fine-tuning mechanism, a rotating shaft is provided on the adjusting screw, and the rotating shaft can drive the first thread to rotate clockwise to move the adjusting screw downward, while the second thread can drive the movable block to move upward by rotating clockwise.
[0014] In the above-mentioned fine-tuning mechanism, the counterclockwise rotation of the rotating shaft can drive the first thread to rotate counterclockwise to move the adjusting screw upward, and at the same time the counterclockwise rotation of the second thread drives the movable block to move upward.
[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the double-thread stroke fine-adjustment mechanism of an embodiment of the utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the regulating block bracket according to an embodiment of the utility model;
[0018] Figure 3 This is a schematic diagram of the nut seat structure of an embodiment of the utility model;
[0019] Figure 4 This is a schematic diagram of the structure of the fixing seat of an embodiment of the utility model;
[0020] Description of the accompanying drawings: 100 fixed seat, 110 slot, 200 movable block, 300 adjusting screw, 310 first thread, 320 second thread, 330 rotating shaft, 400 threaded hole, 500 nut seat, 600 adjusting block bracket, 611 through hole, 610 groove, 700 limit block. DETAILED DESCRIPTION
[0021] The embodiments of the present invention are described in detail below. Figures 1 to 4 The embodiment of the utility model provides a double-thread stroke fine-tuning mechanism, including a fixed seat 100, a movable block 200 and an adjusting screw 300, the movable block 200 is clamped with the fixed seat 100, the movable block 200 is provided with a threaded hole 400, the adjusting screw 300 is screwed into the threaded hole 400 and connected with the movable block 200, the adjusting screw 300 is provided with a first thread 310 and a second thread 320, the first thread 310 and the second thread 320 are located at two ends of the adjusting screw 300, the pitches of the first thread 310 and the second thread 320 are different, and the first thread 310 It is connected to the nut seat 500, and the second thread 320 is connected to the movable block 200. The adjusting screw 300 can rotate clockwise or counterclockwise to drive the movable block 200 to move up and down. The adjusting screw 300 is provided with threads with different pitches. When the adjusting screw 300 rotates, it can drive the movable block to move up and down. The two sections with different pitch differences can rotate clockwise and counterclockwise in the mechanism to achieve fine adjustment, that is, the adjustment amount of one rotation is determined by the pitch difference of the two sections of threads. This structure not only has low cost, but also has a large adjustment range and is easy to fix. Most importantly, it can meet the large stroke adjustment of large structures.
[0022] Further, refer to Figure 1 The fixed seat 100 is used to fix the movable block 200 and the adjusting screw 300. The movable block 200 is used to move up and down. The adjusting screw 300 is used to adjust the pitch so that the movable block 200 moves up and down to adjust the distance. Furthermore, a rotating shaft 330 is provided on the adjusting screw 300. The clockwise rotation of the rotating shaft 330 can drive the first thread 310 to rotate clockwise to move the adjusting screw 300 downward. At the same time, the clockwise rotation of the second thread 320 drives the movable block 200 to move upward. Furthermore, the counterclockwise rotation of the rotating shaft 330 can drive the first thread 310 to rotate counterclockwise to move the adjusting screw 300 upward. At the same time, the counterclockwise rotation of the second thread 320 drives the movable block 200 to move upward.
[0023] Furthermore, refer to Figure 4The fixing seat 100 is provided with a card slot 110, and the movable block 200 is connected to the card slot 110 and can move up and down along the card slot 110. The card slot 110 is used to limit the mechanical movement of the movable block 200 in the XY direction, so that the movable block can move freely in the Z direction. Of course, the utility model does not limit the specific structure and actual size of the card slot 110. Preferably, the structure and actual size of the card slot 110 are the same as those of the movable block 200. Further, referring to Figure 1 The fine-tuning structure also includes an adjustment block bracket 600, which is fixed to the upper end surface of the fixing seat 100. Figure 2 , a through hole 611 is provided on the adjusting block bracket 600, and the adjusting screw 300 passes through the through hole 611 to engage with the movable block 200, and the adjusting block bracket 600 is used to fix the adjusting screw 300. Further, a groove 610 is provided on the adjusting block bracket 600, and a through hole 611 is provided inside the groove 610. The adjusting screw 300 passes through the through hole 611 to engage with the movable block 200. When the fine-tuning structure is installed, the first thread 310 of the adjusting screw 300 is first screwed into the nut seat 500, and then the nut seat 500 is installed and fixed from both sides. At this time, the adjusting screw 300 is rotated clockwise to make the adjusting screw 300 move downward through the first thread 310, and at the same time, the second thread 320 drives the movable block 200 to move upward. Of course, the utility model is not limited to the first thread 310 The specific structure of the first thread 310 and the second thread 320 is that preferably, the first thread 310 is made of M12*1.5, and the second thread 320 is made of M10*1.25, that is, when the adjusting screw 300 rotates 360°, the total downward movement of the movable block 200 is 1.5mm-1.25mm=0.25mm, when the adjusting screw 300 rotates 1°, the movement of the movable block 200 is 0.25 / 360=0.00069mm, when the adjusting screw 300 rotates 10°, the movement of the movable block 200 is 0.0069mm, and when the adjusting screw 300 rotates 100°, the movement of the movable block 200 is 0.069mm, that is, the adjustment amount can be controlled within an accuracy of 0.01mm during manual intuitive adjustment.
[0024] Furthermore, the present invention does not limit the specific structure of the nut seat 500. The nut seat 500 is used to adjust the engagement of the first thread 310 of the screw rod 300. Preferably, refer to Figure 3The nut seat 500 is a split structure. When the fine-tuning structure is installed, the adjusting screw 300 is first screwed into the appropriate depth, and then the split nut seat 500 is installed and fixed from both sides. The nut seat 500 in the fine-tuning structure provided by the utility model is fixed to the upper end surface of the adjusting block bracket 600, and a threaded hole 400 is provided on the nut seat 500. The adjusting screw 300 is screwed into the threaded hole 400 and meshed with the movable block 200. Furthermore, the fine-tuning structure also includes a limit block 700. The limit block 700 is used to prevent the movable block 200 from moving forward and backward. The limit block 700 is connected to the fixed seat 100. Of course, the utility model does not limit the specific connection method between the limit block 700 and the fixed seat 100. Preferably, the limit block 700 and the fixed seat 100 are both provided with a threaded hole 400, and the limit block 700 is connected to the fixed seat 100 by screws.
[0025] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.
[0026] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0028] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.
Claims
1. A double-thread stroke fine-tuning mechanism, characterized in that The invention comprises a fixed seat (100), a movable block (200) and an adjusting screw (300), wherein the movable block (200) is clamped with the fixed seat (100), a threaded hole (400) is provided on the movable block (200), the adjusting screw (300) is screwed into the threaded hole (400) and connected with the movable block (200), a first thread (310) and a second thread (320) are provided on the adjusting screw (300), the first thread (310) and the second thread (320) are located at two ends of the adjusting screw (300), the first thread (310) and the second thread (320) have different pitches, the first thread (310) is connected with a nut seat (500), the second thread (320) is connected with the movable block (200), and the adjusting screw (300) can rotate clockwise or counterclockwise to drive the movable block (200) to move up and down.
2. The fine-tuning structure according to claim 1, characterized in that: The fixing seat (100) is provided with a slot (110), the movable block (200) is engaged with the slot (110), and the movable block (200) can move up and down along the slot (110).
3. The fine-tuning structure according to claim 1 is characterized in that , and also includes an adjustment block bracket (600). The adjustment block bracket (600) is fixed to the upper end surface of the fixing seat (100), and a through hole (611) is provided on the adjustment block bracket (600). The adjustment screw (300) is screwed into the through hole (611) to engage with the movable block (200).
4. The fine-tuning structure according to claim 3, characterized in that: The adjusting block bracket (600) is provided with a groove (610), and a through hole (611) is provided inside the groove (610).
5. The fine-tuning structure according to claim 3, characterized in that: The nut seat (500) is a split structure, the nut seat (500) is fixed to the upper end surface of the adjustment block bracket (600), a threaded hole (400) is provided on the nut seat (500), and the adjustment screw (300) is screwed into the threaded hole (400) to be connected with the movable block (200).
6. The fine-tuning structure according to claim 1, characterized in that: It also includes a limiting block (700) connected to the fixing seat (100).
7. The fine-tuning structure according to claim 6, characterized in that: The limiting block (700) and the fixing seat (100) are both provided with threaded holes (400), and the limiting block (700) and the fixing seat (100) are connected via screws.
8. The fine-tuning structure according to claim 1, characterized in that: The first thread (310) is made of a size of M12*1.5, and the second thread (320) is made of a size of M10*1.
25.
9. The fine-tuning structure according to claim 1, characterized in that: The adjusting screw (300) is provided with a rotating shaft (330), and the rotating shaft (330) can drive the first thread (310) to rotate clockwise to move the adjusting screw (300) downward, while the second thread (320) can drive the movable block (200) to move upward by rotating clockwise.
10. The fine-tuning structure according to claim 9, characterized in that: The counterclockwise rotation of the rotating shaft (330) can drive the first thread (310) to rotate counterclockwise to move the adjusting screw (300) upward, while the counterclockwise rotation of the second thread (320) drives the movable block (200) to move upward.