Modularized variable pitch thread ball screw

Abstract

The utility model relates to the technical field of screw rods, and discloses a modularized variable pitch thread ball screw, which comprises a first screw rod and a second screw rod, the inner wall of the right end of the first screw rod is provided with a plug-in groove, the inner wall of the second screw rod is fixedly connected with a plug-in rod, the plug-in groove is matched with the plug-in rod in shape, and the plug-in rod is fixedly connected with the plug-in groove. A rotating rod is rotationally connected to the inner wall of the inserting rod, clamping grooves are formed in the upper side and the lower side of the inner wall of the first lead screw, the rotating rod is connected with the clamping grooves through a clamping assembly, and a calibration assembly is arranged at the left end of the second lead screw. The clamping blocks on the upper side and the lower side are made to enter the clamping grooves, the first lead screw and the second lead screw are connected together, and therefore the length of the modular splicing lead screw is achieved, damaged parts can be conveniently and independently replaced, and the first inserting rod and the second inserting rod are inserted into the first inserting groove and the second inserting groove respectively, so that assembling is convenient. Calibration of the first lead screw and the second lead screw during splicing is achieved, and mismatching of threads on the outer walls of the first lead screw and the second lead screw due to orientation errors during connection is avoided.

Description

Technical Field

[0001] This utility model relates to the field of ball screw technology, and in particular to a modular variable pitch threaded ball screw. Background Technology

[0002] With the continuous improvement of industrial automation, various production equipment and mechanical systems are placing higher demands on the precision, speed, and flexibility of transmission components. Traditional constant-pitch ball screws are gradually showing their limitations in some complex motion control scenarios. For example, in automated production lines that require simultaneous rapid feed and precise position control, single-pitch screws struggle to achieve optimal performance at different operating stages. To meet the higher requirements of transmission systems in industrial automation, modular variable-pitch ball screws have emerged.

[0003] A search revealed a novel nickel-based alloy segmented screw, publication number CN109296720B, comprising a screw pusher, a screw, segmented connection ports, a slot, a buckle, an elastic post, a built-in spring, a buckle lock, a baffle, and a check ring. The screw pusher is threaded to the screw body. The segmented connection ports are a slot and a buckle, integrated with the segmented screw. The elastic post rests on the built-in spring, which is engaged in the slot of the buckle. The buckle lock is engaged in the inner groove of the slot. The baffle changes the movement state of each segment. A head sleeve includes a check ring. The advantages of this invention are: the new material properties of nickel-based alloy increase the service life of the screw; the detachable segmented design allows for direct replacement of a damaged segment, greatly reducing resource waste and reprocessing costs, and thus possessing significant market potential.

[0004] Based on the aforementioned patent, by splitting a screw into multiple screw segments and fixing them with slots and buckles in the opposite direction to the thread, only the damaged segment needs to be replaced when partial damage occurs during operation, which greatly improves work efficiency and reduces production costs. However, the lack of a calibration structure during connection makes it impossible to determine whether the threads match after connection. In response to this technical problem, this application proposes a modular variable pitch threaded ball screw. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a modular variable pitch threaded ball screw. This allows the locking blocks on both the upper and lower sides to enter the slots, connecting the first and second screws together. This enables modular splicing of screw lengths and facilitates individual replacement of damaged parts, reducing maintenance and repair costs. Furthermore, by inserting the first and second inserts into the first and second slots respectively, calibration is achieved during the splicing of the first and second screws, preventing misalignment of the threads on their outer walls due to incorrect connection.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a modular variable pitch threaded ball screw, including a first screw and a second screw. The inner wall of the right end of the first screw is provided with a insertion groove, and the inner wall of the second screw is fixedly connected with an insertion rod. The insertion groove and the insertion rod are shaped to fit together. A rotating rod is rotatably connected to the inner wall of the insertion rod. The upper and lower sides of the inner wall of the first screw are provided with slots. The rotating rod is connected to the slots through a snap-fit ​​assembly. A calibration assembly is provided at the left end of the second screw.

[0007] Furthermore, the snap-fit ​​assembly includes a movable rod threadedly connected to the inner wall of the rotating rod, a connecting disc fixedly connected to the left end of the movable rod, and the outer wall of the connecting disc slidably connected to the inner wall of the plug-in rod.

[0008] Furthermore, the upper and lower sides of the inner wall of the left end of the connecting plate are rotatably connected to support rods, and the other end of each support rod is rotatably connected to a locking block. The outer wall of the locking block is slidably connected to the inner wall of the plug rod, and the shape of the locking block matches the shape of the locking groove.

[0009] Furthermore, the calibration assembly includes a first insert fixedly connected to the front side of the left end of the second lead screw, and a first slot is provided on the front side of the right end of the first lead screw, with the first insert fitting the shape of the first slot.

[0010] Furthermore, a second insert rod is fixedly connected to the rear side of the left end of the second lead screw, and a second slot is provided on the rear side of the right end of the first lead screw, with the second insert rod fitting conically into the second slot.

[0011] Furthermore, a cross groove is provided at the right end of the rotating rod to allow the rotating rod to rotate.

[0012] Furthermore, a slot is provided at the right end of the second lead screw, and the cross groove is located inside the slot.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, by inserting the plug rod on the second lead screw into the plug groove on the first lead screw and rotating the rotating rod, the locking blocks on the upper and lower sides enter the locking groove, thereby connecting the first lead screw and the second lead screw together, thus realizing the modular splicing of the lead screw length, and facilitating the individual replacement of damaged parts.

[0015] 2. In this utility model, the first insert rod and the second insert rod are respectively inserted into the first slot and the second slot to achieve calibration when splicing the first lead screw and the second lead screw, so as to avoid misalignment of the threads on the outer wall during connection. Attached Figure Description

[0016] Figure 1This is a perspective view of the modular variable pitch threaded ball screw proposed in this utility model;

[0017] Figure 2 This is a development diagram of the first and second lead screws of the modular variable pitch threaded ball screw proposed in this utility model.

[0018] Figure 3 This is a first sectional view of the modular variable pitch threaded ball screw proposed in this utility model;

[0019] Figure 4 This is a cross-sectional view of the second lead screw of the modular variable pitch threaded ball screw proposed in this utility model;

[0020] Figure 5 This is a cross-sectional view of the connector rod of the modular variable pitch threaded ball screw proposed in this utility model.

[0021] Legend:

[0022] 1. First lead screw; 2. Second lead screw; 3. Insertion slot; 4. Insertion rod; 5. Cross groove; 6. Rotating rod; 7. Moving rod; 8. Support rod; 9. Locking block; 10. Locking groove; 11. First insertion rod; 12. First slot; 13. Second insertion rod; 14. Second insertion rod; 15. Connecting plate; 16. Groove. Detailed Implementation

[0023] 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.

[0024] Reference Figures 1-3 This utility model provides an embodiment of a modular variable pitch threaded ball screw, including a first screw 1 and a second screw 2. The inner wall of the right end of the first screw 1 has a insertion groove 3, and the inner wall of the second screw 2 is fixedly connected to an insertion rod 4. The insertion groove 3 and the insertion rod 4 are shaped to fit together. (Refer to...) Figure 4 and Figure 5The inner wall of the plug rod 4 is rotatably connected to a rotating rod 6. The upper and lower sides of the inner wall of the first lead screw 1 are provided with slots 10. The inner wall of the rotating rod 6 is threadedly connected to a moving rod 7. The left end of the moving rod 7 is fixedly connected to a connecting plate 15. The outer wall of the connecting plate 15 is slidably connected to the inner wall of the plug rod 4. The upper and lower sides of the inner wall of the left end of the connecting plate 15 are rotatably connected to support rods 8. The other end of the support rod 8 is rotatably connected to a locking block 9. The outer wall of the locking block 9 is slidably connected to the inner wall of the plug rod 4. The locking block 9 and the slot 10 are matched in shape. The right end of the rotating rod 6 is provided with a cross groove 5 for rotating the rotating rod 6. The right end of the second lead screw 2 is provided with a slot 16. The cross groove 5 is located inside the slot 16.

[0025] Specifically, the plug rod 4 is located inside the second lead screw 2. The right end of the second lead screw 2 has a slot 16, which communicates with the right end of the plug rod 4. A screwdriver can be inserted into the slot 16 and rotated to rotate the cross groove 5, thereby driving the rotating rod 6 to rotate. The rotating rod 6 then drives the moving rod 7 to move to the left, causing the connecting plate 15 to slide to the left, thereby supporting the support rod 8 outward and pushing the locking block 9 into the locking groove 10, thus fixing the plug rod 4 and the first lead screw 1 together. When a section of the first lead screw 1 or the second lead screw 2 is damaged, it is only necessary to separate the first lead screw 1 and the second lead screw 2 and replace the damaged part.

[0026] Reference Figure 2 The first insertion rod 11 is fixedly connected to the front left end of the second lead screw 2. The first slot 12 is opened on the front right end of the first lead screw 1. The shape of the first insertion rod 11 matches the shape of the first slot 12. The second insertion rod 13 is fixedly connected to the rear left end of the second lead screw 2. The second slot 14 is opened on the rear right end of the first lead screw 1. The second insertion rod 13 matches the cone shape of the second slot 14.

[0027] Specifically, the first insertion rod 11 is a long insertion rod, while the second insertion rod 13 is an end insertion rod. When the first insertion rod 11 is inserted into the first slot 12 and the second insertion rod 13 is inserted into the second slot 14, the first lead screw 1 and the second lead screw 2 can be brought into contact with each other. Conversely, when the first insertion rod 11 is inserted into the second slot 14, the first lead screw 1 and the second lead screw 2 cannot be brought into contact.

[0028] Working principle: When in use, insert the plug rod 4 on the second lead screw 2 into the plug groove 3 on the first lead screw 1. During insertion, the first plug rod 11 and the second plug rod 13 on the left side of the second lead screw 2 will enter the first slot 12 and the second slot 14 on the first lead screw 1. If it cannot be inserted, it means that the front and back direction of the second lead screw 2 is reversed. The second lead screw 2 needs to be rotated back and forth before inserting the plug rod 4 into the plug groove 3, so that the first lead screw 1 and the second lead screw 2 are connected together. At this time, the threads on the outer wall match each other. Then, insert a tool into the slot 16 and rotate the cross groove 5 on the right end of the rotating rod 6. The cross groove 5 drives the rotating rod 6 to rotate, thereby moving the moving rod 7 to the left. The moving rod 7 drives the connecting plate 15 to move to the left, thereby causing the support rods 8 on the upper and lower sides to unfold outward. The support rods 8 push the locking block 9 outward, so that the locking block 9 enters the locking groove 10 inside the first lead screw 1, fixing the first lead screw 1 and the plug rod 4 together, thereby fixing the first lead screw 1 and the second lead screw 2 together.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Modular variable-pitch ball screw, characterized in that, The utility model relates to a first screw rod (1) and second screw rod (2) are included, the first screw rod (1) right end inner wall is seted up with the insertion slot (3), the second screw rod (2) inner wall is fixedly connected with the insertion rod (4), the insertion slot (3) with the insertion rod (4) shape is compatible, the insertion rod (4) inner wall rotatably connected with the rotary rod (6), the first screw rod (1) inner wall upper and lower sides are all seted up with the clamping groove (10), the rotary rod (6) is connected with clamping groove (10) through the clamping component, the second screw rod (2) left end is provided with calibration component.

2. The modular variable-pitch threaded ball screw of claim 1, wherein: The clamping component includes the moving rod (7) that is connected in the rotary rod (6) inner wall, the moving rod (7) left end fixedly connected with the connecting disc (15), the connecting disc (15) outer wall sliding connection is established in the insertion rod (4) inner wall.

3. The modular variable-pitch ball screw of claim 2, wherein: The connecting disc (15) left end inner wall upper and lower sides rotatably connected with the support rod (8), the support rod (8) other end rotatably connected with the clamping block (9), the clamping block (9) outer wall sliding connection is established in the insertion rod (4) inner wall, the clamping block (9) with clamping groove (10) shape is compatible.

4. The modular variable-pitch threaded ball screw of claim 1, wherein: The calibration component includes the first insertion rod (11) that is fixedly connected in the second screw rod (2) left end front side, the first screw rod (1) right end front side is seted up with the first insertion slot (12), the first insertion rod (11) with the first insertion slot (12) shape is compatible.

5. The modular variable-pitch ball screw of claim 4, wherein: The second screw rod (2) left end rear side fixedly connected with the second insertion rod (13), the first screw rod (1) right end rear side is seted up with the second insertion slot (14), the second insertion rod (13) with the second insertion slot (14) taper is compatible.

6. The modular variable-pitch threaded ball screw of claim 1, wherein: The rotary rod (6) right end is seted up with cross slot (5), to make rotary rod (6) rotate.

7. The modular variable-pitch ball screw of claim 6, wherein: The second screw rod (2) right end is seted up with the notch (16), the cross slot (5) is located in the notch (16) inside.

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