Long lead screw anti-sagging multi-position supporting structure
By using a multi-position support structure to prevent long lead screw sagging, and employing multi-point segmented support and buffer design, the problem of long lead screw sagging is solved, achieving higher precision and lower cost machine tool transmission, and improving the durability and maintenance efficiency of the device.
Patent Information
- Application Number
- CN202520526030.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-25
AI Technical Summary
Existing machine tool lead screws tend to sag when they are around six meters long, affecting accuracy. Furthermore, gear and rack drives suffer from low accuracy and high cost.
The long lead screw adopts a multi-position support structure to prevent sagging. By using a multi-point segmented support method, components such as slide box, hanging block, impact block and buffer block are used to prevent the lead screw from sagging, while providing a buffering effect, improving transmission accuracy and reducing cost.
Using lead screw drives on longer machine tools improves accuracy, reduces costs, and enhances the durability and maintenance efficiency of the device.
Smart Images
Figure CN223889535U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to machine tool long lead screw technical field especially long lead screw prevents drooping multi -position support structure. BACKGROUND
[0002] Machine tool is mainly used to rotate the workpiece with turning tool and carries out the turning processing, can also use drill bit, reamer, reamer, tap, die and knurling tool etc. on machine tool carries out corresponding processing, machine tool is mainly used for processing shaft, disc, sleeve and other workpieces with rotary surface, is the most widely used one kind of equipment in mechanical manufacturing and repair factory, in machine tool, lead screw is a kind of key transmission component, usually with nut cooperation, converts rotary motion into linear motion, and realizes high-precision displacement control.
[0003] In prior art, long lead screw used on machine tool is generally about six meters, and longer lead screw droops and will affect the precision of machine tool, causes the processing workpiece to be scrapped, and the machine tool cannot be used, so long machine tool adopts gear rack drive, but gear rack drive also has low precision, gear gap is difficult to eliminate, gear box is expensive and other problems, solving long lead screw droop problem can directly improve precision and reduce cost, therefore, the utility model provides long lead screw prevents drooping multi -position support structure. Utility model content
[0004] In view of the deficiency of prior art, the utility model provides long lead screw prevents drooping multi -position support structure, and the advantage of structure is to solve the problem of long lead screw droop bending, can use lead screw transmission on longer machine tool, compared with gear rack reduction box transmission, higher precision, cheaper and lower cost.
[0005] This utility model provides the following technical solution: a multi-position support structure for preventing sagging of a long lead screw, including a bed, a lead screw movably sleeved at the front of the bed, two saddles movably connected to the upper part of the bed, a slide box fixedly installed at the front of the saddle, a drive motor installed in the slide box, the slide box movably sleeved with the lead screw, hanging blocks fixedly installed on the left and right sides of the slide box, a fixing rod fixedly sleeved on the hanging blocks, a linear guide rail fixedly installed at the front of the bed and below the lead screw, four sliders movably connected to the linear guide rail, a bracket fixedly installed at the front of the slider, and a C-shaped opening at the front of the bracket. The machine bed has a C-shaped slot in which a mounting block is fixedly installed. A hook is movably connected to the front of the mounting block via a shaft. The hook has a groove that engages with a fixing rod. A support block is provided on the upper part of the bracket and is movably connected to the lead screw. Two fixing frames are evenly fixedly installed at the front of the bed and below the linear guide. A stop block is fixedly installed on the upper part of the fixing frame. The multi-point segmented support method prevents the lead screw from sagging without affecting the feed motion. Lead screw transmission can be used on longer machine tools. Compared with gear rack and pinion reducers, it has higher transmission accuracy, lower price and lower cost, and has good economic benefits.
[0006] Preferably, the impact block includes a housing, and a spring is fixedly installed on the left side of the inner cavity of the housing. There are two springs, which are symmetrically distributed vertically. A movable block is fixedly installed on the telescopic end of the spring. The movable block is movably sleeved with the right side of the inner cavity of the housing. A buffer block is fixedly installed on the right side of the movable block. When the impact block collides with the hook, the hook contacts the buffer block first. The buffer block drives the movable block into the inner cavity of the housing, so that the spring is compressed to generate elastic potential energy to provide a buffering effect, preventing the impact force between the impact block and the hook from being too large, avoiding large damage to the mechanism, and improving the durability of the device.
[0007] Preferably, the upper part of the bracket has a sliding groove, the number of the sliding grooves is two and they are symmetrically distributed on the left and right. The bottom of the sliding groove has a cavity, and a pull rod is movably sleeved at the bottom of the cavity. A second movable block is fixedly installed at the upper end of the pull rod. The second movable block is movably connected in the cavity. The locking mechanism between the pull rod and the other part is adjusted by the locking mechanism. Compared with the bolt fixing mechanism, this avoids a lot of time spent on disassembly and assembly, and is beneficial for the maintenance of the device by the staff in the later stage.
[0008] Preferably, a second spring is fixedly installed at the bottom of the cavity and outside the pull rod. The upper end of the second spring is fixedly installed at the bottom of the second movable block. A connecting block is fixedly installed on the upper part of the second movable block. The connecting block is movably connected to the slide groove. When installing a new support block, the pull rod is loosened and the elastic potential energy of the second spring is used to re-engage the mechanisms, making the installation of the support block convenient and quick, and effectively improving the maintenance efficiency of the support mechanism.
[0009] Preferably, two ribs are fixedly installed at the bottom of the support block, and each rib is matched with a sliding groove. A second groove is provided at the bottom of the rib, and the second groove engages with the connecting block. By adjusting the engagement between the connecting block and the second groove, the support block can be easily disassembled and assembled, avoiding excessive wear of the support block made of nylon material after long-term use, which would affect the support effect. This ensures the stable support effect of the support mechanism and guarantees the transmission accuracy of the lead screw.
[0010] Compared with the prior art, the advantages of this utility model are as follows:
[0011] 1. When the slide box drives the saddle to move for feed, the hanging block on the slide box hits the hook. The hook lifts up along the inclined plane, causing the groove one to engage with the fixed rod on the hanging block. At this time, the support block moves with the slide box. When it moves to the impact block on the bed, the hook lifts up, causing the groove one to disengage from the fixed rod, and the slide box moves autonomously. There is a hanging block on each side of the slide box. The above cycle is repeated at each impact block. Therefore, a set of mechanism support screws is left at each impact block. The screws are prevented from sagging by multi-point segmented support, and the feed motion is not affected. Screw transmission can be used on longer machine tools. Compared with gear and rack reducers, the transmission accuracy is higher, the price is cheaper, and the cost is lower, resulting in good economic benefits.
[0012] 2. When the impact block collides with the hook, the hook contacts the buffer block first. The buffer block then drives the moving block into the inner cavity of the housing, causing the spring to compress and generate elastic potential energy to provide a buffering effect. This prevents excessive impact force between the impact block and the hook, avoids significant damage between the mechanisms, and improves the durability of the device. By pulling down the lever, the engagement between the connecting block and the second groove is broken, allowing the support block to slide out from the top of the bracket. During installation, releasing the lever utilizes the elastic potential energy of the second spring to re-engage the connecting block with the second groove, making the support block easy and quick to install and remove, avoiding a lot of time spent on disassembly and assembly. This facilitates subsequent maintenance and upkeep of the device by staff, improving the maintenance efficiency of the support mechanism. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the external structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the bed saddle structure of this utility model;
[0015] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;
[0016] Figure 4 This is a schematic diagram of the block fixing structure of this utility model;
[0017] Figure 5This is a schematic diagram of the impact block buffer structure of this utility model.
[0018] In the diagram: 1. Bed; 2. Lead screw; 3. Saddle; 4. Slide box; 5. Hanging block; 6. Fixing rod; 7. Linear guide rail; 8. Slider; 9. Bracket; 10. C-groove; 11. Mounting block; 12. Hook; 13. Groove one; 14. Support block; 15. Fixing frame; 16. Impact block; 161. Housing; 162. Spring one; 163. Moving block one; 164. Buffer block; 17. Slide groove; 18. Cavity; 19. Pull rod; 20. Moving block two; 21. Spring two; 22. Connecting block; 23. Rib; 24. Groove two. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figures 1-5The long lead screw anti-sagging multi-position support structure includes a bed 1, a lead screw 2 movably connected to the front of the bed 1, two saddles 3 movably connected to the upper part of the bed 1, a slide box 4 fixedly installed at the front of the saddle 3, a drive motor installed in the slide box 4, the slide box 4 movably connected to the lead screw 2, hanging blocks 5 fixedly installed on the left and right sides of the slide box 4, a fixing rod 6 fixedly sleeved on the hanging blocks 5, a linear guide rail 7 fixedly installed at the front of the bed 1 and below the lead screw 2, four sliders 8 movably connected to the linear guide rail 7, and the front of the sliders 8... A bracket 9 is fixedly installed, with a C-shaped slot 10 at the front. A mounting block 11 is fixedly installed in the C-shaped slot 10. A hook 12 is movably connected to the front of the mounting block 11 via a shaft. A groove 13 is provided on the hook 12, which engages with the fixing rod 6. A support block 14 is provided on the upper part of the bracket 9, and the support block 14 is movably connected to the lead screw 2. Two fixing frames 15 are evenly fixedly installed at the front of the bed 1 and below the linear guide rail 7. A stop block 16 is fixedly installed on the upper part of the fixing frame 15. The drive motor in the slide box 4 is started. Two sets of saddles 3 are driven to feed. The bracket 9 has an adjustment hole on the slider 8, which can adjust the position of the support block 14 according to the degree of drooping and bending of the lead screw 2 and provide support. After adjustment, the fixing screw is tightened. The hook 12 can swing in front of the mounting block 11, but the swing angle is limited by the C-shaped groove 10 at the front of the bracket 9. The slide box 4 is equipped with a hanging block 5. When the hanging block 5 hits the hook 12, the hook 12 is lifted along the inclined surface so that the groove 13 engages with the fixing rod 6 on the hanging block 5. At this time, the slider 8 drives the support block 14 to move together with the slide box 4. When it moves to the bed 1 At the impact block 16, the hook 12 is lifted, causing the engagement between the groove 13 and the fixing rod 6 on the hanging block 5 to disengage, and the slide box 4 moves autonomously. Each side of the slide box 4 is equipped with a hanging block 5. The above cycle is repeated at each impact block 16. Therefore, a set of mechanism support screws 2 will be left at each impact block 16. The screws 2 are prevented from sagging by the multi-point segmented support method, and the feed motion is not affected. The screws 2 can be used for transmission on longer machine tools. Compared with gear and rack reducers, the transmission accuracy is higher, the price is cheaper and the cost is lower, which has good economic benefits.
[0021] The impact block 16 includes a housing 161. Two springs 162 are fixedly installed on the left side of the inner cavity of the housing 161, symmetrically distributed vertically. A movable block 163 is fixedly installed on the telescopic end of each spring 162. The movable block 163 is movably sleeved with the right side of the inner cavity of the housing 161. A buffer block 164 is fixedly installed on the right side of the movable block 163. When the impact block 16 collides with the hook 12, the hook 12 first contacts the buffer block 164. The buffer block 164 then drives the movable block 163 into the inner cavity of the housing 161, causing the springs 162 to compress and generate elasticity. Potential energy provides a buffering effect, preventing excessive impact force between the impact block 16 and the hook 12, avoiding significant damage between the mechanisms, and improving the durability of the device. The upper part of the bracket 9 has two symmetrically distributed sliding grooves 17. A cavity 18 is formed at the bottom of each groove 17, and a pull rod 19 is movably sleeved at the bottom of the cavity 18. A movable block 20 is fixedly installed at the upper end of the pull rod 19, movably connected within the cavity 18. A spring 21 is fixedly installed at the bottom of the cavity 18, outside the pull rod 19, with its upper end fixed... A connecting block 22 is fixedly installed on the bottom of the movable block 20. The connecting block 22 is movably connected to the slide groove 17. Two ribs 23 are fixedly installed on the bottom of the support block 14, and each rib 23 fits into the slide groove 17. The bottom of the rib 23 has a groove 24, which engages with the connecting block 22. After the support mechanism has been used for a long time, the support block 14, made of nylon material, will wear to a certain extent. When replacing it, pull down the pull rod 19. Through the connection of the movable block 20, the pull rod 19 drives the connecting block 14. When the connecting block 22 moves downward, the engagement between the connecting block 22 and the second groove 24 is broken. At this time, the second spring 21 is compressed to generate elastic potential energy. Then, through the engagement of the sliding groove 17 and the rib 23, the support block 14 can be slid out from the upper part of the bracket 9. During installation, the pull rod 19 is released and the elastic potential energy of the second spring 21 is used to make the connecting block 22 and the second groove 24 re-engage. This makes the disassembly and assembly of the support block 14 convenient and quick. Compared with the bolt connection, it avoids spending a lot of time on disassembly and assembly, which is beneficial for the maintenance of the device by the staff in the later stage and improves the maintenance efficiency of the support mechanism.
[0022] Working principle: By starting the drive motor in the slide box 4, the two sets of saddles 3 are driven to feed. The bracket 9 has an adjustment elongated hole on the slider 8, which can adjust the position of the support block 14 according to the degree of drooping and bending of the lead screw 2 and provide support. After adjustment, the fixing screw is tightened. The hook 12 can swing in front of the mounting block 11, but the swing angle is limited by the C-shaped groove 10 at the front of the bracket 9. The slide box 4 is equipped with a hanging block 5. When the hanging block 5 hits the hook 12, the hook 12 is lifted along the inclined surface, so that the groove 13 engages with the fixing rod 6 on the hanging block 5. At this time, the slider 8 drives the support block 14 to move with the slide box 4. When it moves to the impact block 16 on the bed 1, the hook 12 is lifted, so that the engagement between the groove 13 and the fixing rod 6 on the hanging block 5 is disengaged, and the slide box 4 moves autonomously. There is a hanging block 5 on each side of the slide box 4. The above cycle is repeated at each impact block 16, so a mark is left at each impact block 16. A set of mechanisms supports the lead screw 2 to prevent it from drooping and bending. When the impact block 16 collides with the hook 12, the hook 12 first contacts the buffer block 164. The buffer block 164 drives the moving block 163 into the inner cavity of the housing 161, causing the spring 162 to compress and generate elastic potential energy to provide a buffering effect. After the support mechanism has been used for a long time, the support block 14 made of nylon material will wear to a certain extent. When replacing it, pull the lever 19 downward. Through the connection of the moving block 20, the lever 19 drives the connecting block 22 downward, breaking the engagement between the connecting block 22 and the groove 24. At this time, the spring 21 is compressed and generates elastic potential energy. Then, through the engagement of the slide groove 17 and the rib 23, the support block 14 can be slid out from the upper part of the bracket 9. During installation, the lever 19 is released and the elastic potential energy of the spring 21 is used to re-engage the connecting block 22 and the groove 24, making the disassembly and assembly of the support block 14 convenient and quick.
Claims
1. A multi-position support structure for preventing sagging of long lead screws, including a bed (1), characterized in that: The bed (1) is movably connected to a lead screw (2) at the front. The bed (1) is movably connected to a saddle (3) at the upper part. There are two saddles (3). A slide box (4) is fixedly installed at the front of the saddle (3). A drive motor is installed in the slide box (4). The slide box (4) is movably connected to the lead screw (2). Hanging blocks (5) are fixedly installed on the left and right sides of the slide box (4). A fixing rod (6) is fixedly sleeved on the hanging block (5). A linear guide rail (7) is fixedly installed at the front of the bed (1) and below the lead screw (2). A slider (8) is movably connected to the linear guide rail (7). There are four sliders (8). The front of the slider (8) A bracket (9) is fixedly installed. A C-shaped slot (10) is opened at the front of the bracket (9). An installation block (11) is fixedly installed in the C-shaped slot (10). A hook (12) is movably connected to the front of the installation block (11) via a shaft. A groove (13) is opened on the hook (12). The groove (13) is engaged with the fixing rod (6). A support block (14) is provided on the upper part of the bracket (9). The support block (14) is movably connected to the lead screw (2). A fixing frame (15) is fixedly installed at the front of the bed (1) and below the linear guide rail (7). There are two fixing frames (15). A bumper (16) is fixedly installed on the upper part of the fixing frame (15).
2. The multi-position support structure for preventing sagging of long lead screws according to claim 1, characterized in that: The impact block (16) includes a housing (161). A spring (162) is fixedly installed on the left side of the inner cavity of the housing (161). There are two springs (162) and they are symmetrically distributed vertically. A movable block (163) is fixedly installed on the telescopic end of the spring (162). The movable block (163) is movably sleeved with the right side of the inner cavity of the housing (161). A buffer block (164) is fixedly installed on the right side of the movable block (163).
3. The multi-position support structure for preventing sagging of long lead screws according to claim 1, characterized in that: The bracket (9) has a sliding groove (17) on its upper part. There are two sliding grooves (17) and they are symmetrically distributed on the left and right. A cavity (18) is provided at the bottom of the sliding groove (17). A pull rod (19) is movably sleeved at the bottom of the cavity (18). A second movable block (20) is fixedly installed at the upper end of the pull rod (19). The second movable block (20) is movably connected in the cavity (18).
4. The multi-position support structure for preventing sagging of long lead screws according to claim 3, characterized in that: A second spring (21) is fixedly installed at the bottom of the cavity (18) and outside the pull rod (19). The upper end of the second spring (21) is fixedly installed at the bottom of the second movable block (20). A connecting block (22) is fixedly installed on the upper part of the second movable block (20). The connecting block (22) is movably connected to the slide groove (17).
5. The multi-position support structure for preventing sagging of long lead screws according to claim 4, characterized in that: The bottom of the support block (14) is fixedly installed with a rib (23). There are two ribs (23) and they are respectively matched with the slide groove (17). The bottom of the rib (23) is provided with a groove (24), which is engaged with the connecting block (22).