Pre-tensioning device for a lead screw

Abstract

The utility model discloses a pre -tension device for screw rod relates to screw rod protection technical field, and its technical scheme is: including screw rod body: the lateral fixed connection of screw rod body has the cross bar, and the cross bar outside is equipped with the frame, and the inside of frame is equipped with two bearings, and two bearings are all equipped with in the cross bar outside, and the cross bar outside is equipped with a plurality of butterfly elastic pad, and the butterfly elastic pad is equipped with in bearing one side, and the frame one side is located in the washer, and the washer is located in butterfly elastic pad one side, the beneficial effects of the utility model are: through adding butterfly elastic pad between washer and bearing, can increase the elasticity, play to tighten and rebound in the movement process, reach the effect of pre -tension, improve the machining accuracy, and then improve the machining effect of parts, reduce the error of part processing product, and the setting of mobile assembly can be convenient for the state of butterfly elastic pad is observed to can replace butterfly elastic pad in time.

Description

Technical Field

[0001] This utility model relates to the field of lead screw protection technology, specifically to a pre-tensioning device for lead screws. Background Technology

[0002] Ball screws are ideal products for converting rotary motion into linear motion, or vice versa. They are the most commonly used transmission components in machine tools and precision machinery. Their main function is to convert rotary motion into linear motion, or torque into axial reciprocating force, while also possessing the characteristics of high precision, reversibility, and high efficiency. Due to their very low frictional resistance, ball screws are widely used in various industrial equipment and precision instruments.

[0003] In existing traditional lead screw drive structures, the lack of a crucial component—the butterfly spring washer—leads to significant stability defects during operation. When the lead screw is in continuous motion, the tightness between the washer and bearing at the connection point repeatedly fluctuates—sometimes loosening due to vibration, and other times localized overtightness due to uneven force. These frequent tightness variations exacerbate component wear and displacement over long operating cycles. Over time, the originally precise transmission accuracy of the lead screw gradually decreases, manifesting as increased positioning errors and reduced operational smoothness. The decrease in precision directly affects subsequent processing steps, potentially leading to quality issues such as workpiece dimensional deviations and insufficient surface finish. This not only increases the scrap rate but also requires additional time for rework and adjustments. For on-site workers, this instability brings numerous inconveniences: on the one hand, they need to frequently stop the machine to check the lead screw connection status, which increases maintenance workload and downtime, reducing overall production efficiency; on the other hand, due to the large fluctuations in processing precision, workers need to constantly monitor equipment operating parameters, increasing operational difficulty and mental stress, and may even cause safety hazards due to sudden precision deviations.

[0004] Therefore, it is necessary to invent a pre-tensioning device for lead screws. Summary of the Invention

[0005] Therefore, this utility model provides a pre-tensioning device for lead screws to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pre-tensioning device for a lead screw, comprising a lead screw body: a crossbar is fixedly connected to one side of the lead screw body, a frame is sleeved on the outside of the crossbar, and two bearings are provided inside the frame, both of which are sleeved on the outside of the crossbar;

[0007] Multiple butterfly-shaped spring pads are fitted on the outer side of the crossbar. The butterfly-shaped spring pads are fitted on one side of the bearing. A washer is provided on one side of the frame. The washer is located on one side of the butterfly-shaped spring pads. An observation slot is provided on the front side of the frame. A moving component is provided on the top of the frame. The moving component extends into the observation slot.

[0008] Preferably, the movable component includes a vertical plate, the bottom of which is fixedly connected to the top of the frame, a connecting plate is fixedly connected to the top of the vertical plate, and a fixing plate is fixedly connected to the rear side of the connecting plate.

[0009] Preferably, a cylinder is provided on the rear side of the vertical plate, the cylinder passes through the vertical plate and is connected to the vertical plate through a bearing, a push rod is provided inside the cylinder, the push rod extends to the outside of the cylinder and is threadedly connected to the cylinder, and a movable plate is fixedly connected to the front side of the push rod.

[0010] Preferably, a stop block is fixedly connected to the bottom of the movable plate, the stop block matches the observation slot, an anti-slip ring is fixedly sleeved on the outer side of the cylinder, a sliding groove is opened on the rear side of the connecting plate, a slider is embedded in the sliding groove, and the slider is slidably connected to the sliding groove.

[0011] Preferably, a connecting rod is fixedly connected to the rear side of the slider, a pressure plate is fixedly connected to the rear side of the connecting rod, a retaining frame is fixedly connected to the bottom of the pressure plate, the retaining frame is located outside the anti-slip ring, and the inner side of the retaining frame is in contact with the outer side of the anti-slip ring.

[0012] Preferably, a telescopic rod is fixedly connected to the top of the pressure plate, and a spring is sleeved on the outside of the telescopic rod. One end of the spring is fixedly connected to the top of the pressure plate, and the other end of the spring is fixedly connected to the bottom of the fixed plate.

[0013] Preferably, a limiting rod is fixedly connected to the front side of the vertical plate, a limiting block is sleeved on the outside of the limiting rod, the limiting block is slidably connected to the limiting rod, and the bottom of the limiting block is fixedly connected to the top of the movable plate.

[0014] Preferably, a mounting plate is fixedly connected to the bottom of the frame, and multiple sealing gaskets are fixedly connected to the inner wall of the observation slot.

[0015] The beneficial effects of this utility model are:

[0016] This invention increases elasticity by adding a butterfly-shaped spring washer between the washer and the bearing. During operation, the spring washer is tightened and rebounded, achieving a pre-tightening effect, improving machining accuracy, and thus improving the machining effect of the parts. It also reduces the error in the machined parts. At the same time, the movable component allows for easy observation of the status of the butterfly-shaped spring washer, enabling timely replacement of the washer. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 A schematic diagram of the overall structure of this utility model;

[0020] Figure 2 Rear view provided for this utility model;

[0021] Figure 3 A perspective view of the frame provided by this utility model;

[0022] Figure 4 A perspective view of the butterfly-shaped washer provided by this utility model;

[0023] In the diagram: 1. Lead screw body; 2. Crossbar; 3. Frame; 4. Bearing; 5. Butterfly spring washer; 6. Washer; 7. Observation slot; 8. Vertical plate; 9. Connecting plate; 10. Cylinder; 11. Push rod; 12. Stop block; 13. Anti-slip ring; 14. Slide groove; 15. Pressure plate; 16. Clip frame; 17. Telescopic rod; 18. Spring; 19. Limiting block; 20. Mounting plate. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] See attached document Figure 1 -Appendix Figure 4 The lead screw pre-tensioning device provided by this utility model includes a lead screw body 1: a crossbar 2 is fixedly connected to one side of the lead screw body 1, a frame 3 is sleeved on the outside of the crossbar 2, and two bearings 4 are provided inside the frame 3. Both bearings 4 are sleeved on the outside of the crossbar 2.

[0026] Multiple butterfly-shaped spring pads 5 are fitted on the outer side of the crossbar 2. The butterfly-shaped spring pads 5 are fitted on one side of the bearing 4. A washer 6 is provided on one side of the frame 3. The washer 6 is provided on one side of the butterfly-shaped spring pads 5. An observation groove 7 is provided on the front side of the frame 3. A moving component is provided on the top of the frame 3. The moving component extends into the observation groove 7.

[0027] In this implementation scheme, the butterfly-shaped spring pad 5 can effectively increase the elasticity, playing a role in tensioning and rebounding, thus ensuring the accuracy of part processing. The setting of the moving component allows for easy observation of the status of the butterfly-shaped spring pad 5, enabling timely replacement.

[0028] To enable observation of the state of the butterfly-shaped spring pad 5, the device employs the following technical solution: The moving component includes a vertical plate 8, the bottom of which is fixedly connected to the top of the frame 3. A connecting plate 9 is fixedly connected to the top of the vertical plate 8, and a fixing plate is fixedly connected to the rear of the connecting plate 9. A cylinder 10 is located on the rear of the vertical plate 8, penetrating the vertical plate 8 and connected to it via a bearing. A push rod 11 is located inside the cylinder 10, extending to the outside of the cylinder 10 and threadedly connected to it. A moving plate is fixedly connected to the front of the push rod 11, and a stop block 12 is fixedly connected to the bottom of the moving plate, matching the observation slot 7. An anti-slip ring 13 is fixedly fitted on the outer side of the cylinder 10. A sliding groove 14 is opened on the rear of the connecting plate 9, and a slider is embedded inside the sliding groove 14. The slider is slidably connected to the slide groove 14. A connecting rod is fixedly connected to the rear side of the slider. A pressure plate 15 is fixedly connected to the rear side of the connecting rod. A retaining frame 16 is fixedly connected to the bottom of the pressure plate 15. The retaining frame 16 is located outside the anti-slip ring 13. The inner side of the retaining frame 16 is in contact with the outer side of the anti-slip ring 13. A telescopic rod 17 is fixedly connected to the top of the pressure plate 15. A spring 18 is sleeved on the outer side of the telescopic rod 17. One end of the spring 18 is fixedly connected to the top of the pressure plate 15. The other end of the spring 18 is fixedly connected to the bottom of the fixed plate. A limit rod is fixedly connected to the front side of the vertical plate 8. A limit block 19 is sleeved on the outer side of the limit rod. The limit block 19 is slidably connected to the limit rod. The bottom of the limit block 19 is fixedly connected to the top of the moving plate. An installation plate 20 is fixedly connected to the bottom of the frame 3. Multiple sealing gaskets are fixedly connected to the inner wall of the observation groove 7.

[0029] The usage process of this utility model is as follows: When using this utility model, first, the bearing 4 is placed on the crossbar 2, and then the butterfly spring washer 5 is placed on the crossbar 2. Next, the lead screw body 1 is passed through the frame 3, so that the crossbar 2, the butterfly spring washer 5, and the bearing 4 enter the frame 3. Then, the washer 6 is installed. In this way, when the lead screw is working, the butterfly spring washer 5 can be tightened and rebounded, preventing the bearing 4 and the washer 6 from loosening. When it is necessary to observe the state of the butterfly spring washer 5, first pull the pressure plate 15 to lock the frame. 16 moves upward without contacting the anti-slip ring 13. At the same time, the pressure plate 15 moves, causing the connecting rod and slider to move. Simultaneously, the movement of the pressure plate 15 causes the telescopic rod 17 to retract and the spring 18 to compress. Then, the anti-slip ring 13 is rotated, causing the cylinder 10 to rotate. Since the push rod 11 is threadedly connected to the cylinder 10 and under the action of the limiting rod and the limiting block 19, the rotation of the cylinder 10 causes the push rod 11 to move and drive the moving plate to move. At the same time, the stop block 12 is moved out of the observation slot 7, making it convenient to observe the butterfly spring pad 5.

[0030] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A pre-tensioning device for lead screws, characterized in that, Includes lead screw body (1): a crossbar (2) is fixedly connected to one side of the lead screw body (1), a frame (3) is sleeved on the outside of the crossbar (2), and two bearings (4) are provided inside the frame (3), both bearings (4) are sleeved on the outside of the crossbar (2); Multiple butterfly-shaped spring pads (5) are fitted on the outside of the crossbar (2). The butterfly-shaped spring pads (5) are fitted on one side of the bearing (4). A washer (6) is provided on one side of the frame (3). The washer (6) is provided on one side of the butterfly-shaped spring pads (5). An observation groove (7) is provided on the front side of the frame (3). A moving component is provided on the top of the frame (3). The moving component extends into the observation groove (7).

2. The pre-tensioning device for lead screws according to claim 1, characterized in that: The movable component includes a vertical plate (8), the bottom of which is fixedly connected to the top of the frame (3), a connecting plate (9) is fixedly connected to the top of the vertical plate (8), and a fixing plate is fixedly connected to the rear side of the connecting plate (9).

3. The pre-tensioning device for lead screws according to claim 2, characterized in that: A cylinder (10) is provided on the rear side of the vertical plate (8). The cylinder (10) passes through the vertical plate (8) and is connected to the vertical plate (8) through a bearing. A push rod (11) is provided inside the cylinder (10). The push rod (11) extends to the outside of the cylinder (10) and is threadedly connected to the cylinder (10). A movable plate is fixedly connected to the front side of the push rod (11).

4. The pre-tensioning device for lead screws according to claim 3, characterized in that: The bottom of the movable plate is fixedly connected to a stop block (12), which matches the observation slot (7). The outer side of the cylinder (10) is fixedly fitted with an anti-slip ring (13). The rear side of the connecting plate (9) is provided with a sliding groove (14), and a slider is embedded inside the sliding groove (14). The slider is slidably connected to the sliding groove (14).

5. The pre-tensioning device for lead screws according to claim 4, characterized in that: A connecting rod is fixedly connected to the rear side of the slider, and a pressure plate (15) is fixedly connected to the rear side of the connecting rod. A card frame (16) is fixedly connected to the bottom of the pressure plate (15). The card frame (16) is located outside the anti-slip ring (13), and the inner side of the card frame (16) is in contact with the outer side of the anti-slip ring (13).

6. The pre-tensioning device for lead screws according to claim 5, characterized in that: The top of the pressure plate (15) is fixedly connected to a telescopic rod (17), and a spring (18) is sleeved on the outside of the telescopic rod (17). One end of the spring (18) is fixedly connected to the top of the pressure plate (15), and the other end of the spring (18) is fixedly connected to the bottom of the fixed plate.

7. The pre-tensioning device for lead screws according to claim 6, characterized in that: A limiting rod is fixedly connected to the front side of the vertical plate (8), and a limiting block (19) is sleeved on the outside of the limiting rod. The limiting block (19) is slidably connected to the limiting rod, and the bottom of the limiting block (19) is fixedly connected to the top of the moving plate.

8. The pre-tensioning device for lead screws according to claim 1, characterized in that: The bottom of the frame (3) is fixedly connected to an installation plate (20), and the inner wall of the observation slot (7) is fixedly connected to multiple sealing gaskets.

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