Variable pitch roller chain

Abstract

The utility model provides a variable spacing multiple speed chain, including frame, the top of frame is provided with two parallel tracks, two the side wall of track opposite is provided with multiple speed chain drive group, the top wall of frame is provided with at least two parallel joists, the top of joist is provided with positive and negative screw rod, the left sliding block and right sliding block of bottom and joist top sliding connection are screwed on positive and negative screw rod and pass through. In the utility model, the positive and negative screw rod, the left sliding block and the right sliding block are arranged on the joist, the left sliding block and the right sliding block are screw-connected with the positive and negative screw rod and are in sliding cooperation with the joist, the positive and negative screw rod can drive the left sliding block and the right sliding block to move in different directions synchronously when rotating reversely, the top of the left sliding block and the right sliding block is fixedly connected with the bottom wall of the two slide rails through the supporting plate, and thus the distance between the two slide rails can be adjusted symmetrically by controlling the positive and negative screw rod to rotate reversely, so that it is convenient to stably transmit workpieces of different specifications.

Description

Technical Field

[0001] This utility model relates to the field of material conveying equipment technology, specifically a variable-pitch speed-multiplying chain. Background Technology

[0002] In automated production processes, double-speed chain conveyors are typically used for material handling, conveying, positioning, and clamping. These conveyors mainly consist of two parallel tracks and a double-speed chain drive assembly located on the inner walls of the two tracks. The tracks support and guide the items, and the double-speed chain applies traction to the items on the tracks through an adapter, thereby transferring the items.

[0003] However, traditional double-speed conveyors have a fixed spacing, specifically the distance between the two tracks. When transporting workpieces of different specifications, the entire conveyor line often needs to be replaced, increasing production costs and reducing efficiency. Existing technologies include double-speed conveyors with adjustable spacing. However, during adjustment, the center position may shift, causing unstable workpiece transport and affecting subsequent processing accuracy. This shift in center position can lead to workpiece deviation and jamming during transport, severely impacting production continuity and product quality.

[0004] Therefore, this utility model provides a variable-pitch speed-multiplying chain. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a variable-gap speed-multiplying chain to solve the problems mentioned in the background section. This invention has the function of symmetrically adjusting the gap between two parallel tracks, and the adjustment is more convenient. After adjustment, the two tracks remain parallel, and the adjustment accuracy is high.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a variable-pitch speed-multiplying chain, comprising a frame, two parallel tracks on the top of the frame, speed-multiplying chain drive units on the opposite side walls of the two tracks, at least two parallel support beams on the top wall of the frame, and positive and negative lead screws on the top of the support beams, the positive and negative lead screws being rotatably connected to the support beams, and a left slider and a right slider with slidably connected at their bottoms to the tops of the support beams passing through and screwed on the positive and negative lead screws, the tops of the left slider and the right slider being fixedly connected to the bottoms of the two tracks respectively through support plates.

[0007] Furthermore, the double-speed chain drive assembly includes a double-speed chain, a tension wheel, a drive sprocket, and a servo motor. A tension wheel is provided on one side of the track near both ends and connected by the double-speed chain. A positioning plate is welded to the bottom wall of the track. The servo motor is fixedly mounted on one side of the positioning plate, and its output shaft is fixedly connected to a drive sprocket that meshes with the double-speed chain.

[0008] Furthermore, side plates are welded to both sides of the positioning plate, and a tensioning wheel is provided on one side of the side plate between the drive sprocket and the double-speed chain.

[0009] Furthermore, the track is made of aluminum profile.

[0010] Furthermore, a left baffle is fixedly connected to one end of the support beam, and a right baffle is fixedly connected to the top wall of the support beam. The two ends of the positive and negative lead screws are rotatably connected to the left baffle and the right baffle, respectively. A guide groove is provided on the top wall of the support beam. Guide blocks located in the guide grooves are fixedly connected to the bottom of the left slider and the right slider. The guide blocks and the guide grooves are slidably connected.

[0011] Furthermore, a base is fixedly connected to the other end of the support beam, and a second servo motor is fixedly connected to one side of the base. The output shaft of the second servo motor is fixedly connected to one end of the positive and negative lead screws.

[0012] Furthermore, the left and right sliders are respectively provided with threaded holes that are screwed into and connected to the positive and negative lead screws, and have different helical directions.

[0013] Furthermore, a row of screws distributed along the length direction is fixedly connected to the bottom wall of the support beam.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, a positive and negative screw, a left slider and a right slider are provided on the support beam. The left slider and the right slider are screwed to the positive and negative screw and slide in cooperation with the support beam. When the positive and negative screw rotates in both directions, it can drive the left slider and the right slider to move synchronously in different directions. The tops of the left slider and the right slider are fixedly connected to the bottom walls of the two slide rails respectively through support plates. Thus, by controlling the positive and negative screw to rotate in both directions, the distance between the two slide rails can be symmetrically adjusted, which is convenient for stable transmission of workpieces of different specifications.

[0016] 2. In this utility model, a base is fixedly installed at one end of the support beam, and a servo motor is fixedly connected to the base. The output shaft of the servo motor is fixedly connected to one end of the positive and negative lead screws. The number of rotations of the positive and negative lead screws is precisely controlled by the servo motor, which ensures the parallelism of the two tracks after the distance between them is adjusted. The workpiece will not deviate or get stuck during the transmission process, thus ensuring the accuracy of the transmission. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a variable-pitch speed-multiplying chain according to the present invention;

[0018] Figure 2 for Figure 1 A magnified diagram of the central "a";

[0019] Figure 3 for Figure 1 The main view;

[0020] In the diagram: 1. Track; 11. Positioning plate; 111. Side plate; 2. Double-speed chain drive assembly; 21. Double-speed chain; 22. Tensioner wheel; 23. Drive sprocket; 24. Servo motor one; 3. Support beam; 31. Left baffle; 32. Right baffle; 33. Guide groove; 34. Base; 35. Screw; 4. Positive and negative lead screws; 5. Left slider; 6. Right slider; 7. Support plate; 8. Guide block; 9. Servo motor two. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figures 1 to 3 This utility model provides a technical solution: a variable-pitch speed-multiplying chain, including a frame, with two parallel tracks 1 on the top of the frame. The tracks 1 are made of aluminum profiles for greater lightness and support the workpiece. Speed-multiplying chain drive groups 2 are arranged on the opposite side walls of the two tracks 1. Specifically, the speed-multiplying chain drive group 2 includes a speed-multiplying chain 21, a tension wheel 22, a drive sprocket 23, and a servo motor 24. A tension wheel 22 is located near both ends of each track 1 and connected to the speed-multiplying chain 21. The tension wheel 22 tensions the speed-multiplying chain 21. The function of track 1 is as follows: a support plate located inside the double-speed chain 21 is fixedly connected to one side of track 1, so that the transmission section of the double-speed chain 21 is in a straight line. A positioning plate 11 is welded to the bottom wall of track 1. A servo motor 24 is fixedly installed on one side of the positioning plate 11 and its output shaft is fixedly connected to a drive sprocket 23 that meshes with the double-speed chain 21. The servo motor 24 provides driving force to the rotation of the drive sprocket 23. When the double-speed chain 21 is running, it drives the workpiece to move through the adapter. The specific transmission connection method is the prior art and will not be described in detail in this application.

[0023] In this embodiment, side plates 111 are welded to both sides of the positioning plate 11. A tensioning wheel 22 is provided on one side of the side plate 111 between the drive sprocket 23 and the double speed chain 21. The tensioning wheel 22 here allows the double speed chain 21 to pass under the drive sprocket 23, which can effectively avoid the problem of accelerated wear caused by the drive sprocket 23 slipping.

[0024] Mounting holes are provided on the track 1 and the side plate 111. The tension wheel 22 is fixedly mounted on the track 1 and the side plate 111 by bolts, nuts and mounting holes. The tension wheel 22 can be a sprocket or a support wheel of other structures.

[0025] The top wall of the frame is provided with at least two parallel support beams 3. In this embodiment, there are two support beams 3. The support beams 3 are perpendicular to the track 1. A positive and negative lead screw 4 is provided above the support beams 3. The positive and negative lead screw 4 is rotatably connected to the support beams 3. Specifically, a left baffle 31 is fixedly connected to one end of the support beam 3, and a right baffle 32 is fixedly connected to the top wall of the support beam 3. The two ends of the positive and negative lead screw 4 are rotatably connected to the left baffle 31 and the right baffle 32, respectively. In specific implementation, positioning holes are opened on the left baffle 31 and the right baffle 32, which are opposite to the two ends of the positive and negative lead screw 4. Bearings are installed between the positioning holes and the optical shaft on the positive and negative lead screw 4. A left slider 5 and a right slider 5 are screwed through and slidably connected to the bottom and the top of the support beam 3. Specifically, block 6 has a guide groove 33 on the top wall of the support beam 3. The bottom of the left slider 5 and the right slider 6 are both fixedly connected to guide blocks 8 located in the guide groove 33. The guide blocks 8 and the guide groove 33 are slidably connected. The left slider 5 and the right slider 6 are respectively provided with threaded holes that are screwed into the positive and negative screws 4 and have different spiral directions. When the positive and negative screws 4 are rotated, the left slider 5 and the right slider 6 will move synchronously in opposite directions. The top of the left slider 5 and the right slider 6 are fixedly connected to the bottom of the two tracks 1 through the support plate 7. When the left slider 5 and the right slider 6 move synchronously in opposite directions, the distance between the two tracks 1 can be changed, but the center position between the left slider 5 and the right slider 6 will not change.

[0026] Furthermore, the other end of the support beam 3 is fixedly connected to the base 34, and a servo motor 2 9 is fixedly connected to one side of the base 34. The output shaft of the servo motor 2 9 is fixedly connected to one end of the positive and negative lead screw 4. When the servo motor 2 9 at one end of the two support beams 3 is controlled by the controller to move synchronously, the positive and negative lead screw 4 on the two support beams 3 can rotate synchronously in the same direction. This ensures that the two tracks 1 remain parallel after the distance is adjusted, thus guaranteeing the accuracy of the guidance and transmission of the track 1 and the double speed chain 21.

[0027] In this embodiment, a row of screws 35 distributed along the length direction is fixedly connected to the bottom wall of the support beam 3. In use, connection holes adapted to the screws 35 are opened on the frame, and the support beam 3 can be fastened to the frame through the screws 35 and nuts.

[0028] Working principle: When it is necessary to adjust the distance between the two tracks 1, the servo motors 2 and 9 at one end of the two support beams 3 are started synchronously by the controller that is electrically connected to the servo motor 2 and 9. The positive and negative lead screws 4 on the two support beams 3 rotate synchronously in the same direction. The left slider 5 and the right slider 6 move synchronously in different directions along the support beams 3 under the action of the rotation driving force. Under the transmission of the support plate 7, the distance between the two tracks 1 changes while maintaining a parallel state.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A variable-pitch speed-multiplying chain, comprising a frame, wherein two parallel tracks (1) are disposed above the frame, and speed-multiplying chain drive units (2) are disposed on the opposite sidewalls of the two tracks (1), characterized in that, The top wall of the frame is provided with at least two parallel support beams (3). A positive and negative screw (4) is provided above the support beam (3). The positive and negative screw (4) is rotatably connected to the support beam (3). A left slider (5) and a right slider (6) are screwed through the positive and negative screw (4) and are slidably connected to the bottom and the top of the support beam (3). The tops of the left slider (5) and the right slider (6) are fixedly connected to the bottoms of the two tracks (1) respectively through a support plate (7).

2. The variable-pitch speed-multiplying chain according to claim 1, characterized in that: The double-speed chain drive assembly (2) includes a double-speed chain (21), a tension wheel (22), a drive sprocket (23), and a servo motor (24). A tension wheel (22) is provided on one side of the track (1) near both ends and connected by the double-speed chain (21). A positioning plate (11) is welded to the bottom wall of the track (1). The servo motor (24) is fixedly installed on one side of the positioning plate (11), and its output shaft is fixedly connected to the drive sprocket (23) that meshes with the double-speed chain (21).

3. A variable-pitch speed-multiplying chain according to claim 2, characterized in that: The positioning plate (11) has side plates (111) welded on both sides, and a tensioning wheel (22) is provided on one side of the side plate (111) between the drive sprocket (23) and the double speed chain (21).

4. A variable-pitch speed-multiplying chain according to claim 2, characterized in that: The track (1) is made of aluminum profile.

5. A variable-pitch speed-multiplying chain according to claim 1, characterized in that: One end of the support beam (3) is fixedly connected to a left baffle (31), and the top wall of the support beam (3) is fixedly connected to a right baffle (32). The two ends of the positive and negative screws (4) are rotatably connected to the left baffle (31) and the right baffle (32) respectively. The top wall of the support beam (3) is provided with a guide groove (33). The bottom of the left slider (5) and the right slider (6) are both fixedly connected to guide blocks (8) located in the guide groove (33). The guide blocks (8) and the guide groove (33) are slidably connected.

6. A variable-pitch speed-multiplying chain according to claim 5, characterized in that: The other end of the support beam (3) is fixedly connected to the base (34), and a servo motor (9) is fixedly connected to one side of the base (34). The output shaft of the servo motor (9) is fixedly connected to one end of the positive and negative lead screw (4).

7. A variable-pitch speed-multiplying chain according to claim 1, characterized in that: The left slider (5) and right slider (6) are respectively provided with threaded holes that are screwed into and connected to the positive and negative lead screws (4) and have different spiral directions.

8. A variable-pitch speed-multiplying chain according to claim 1, characterized in that: The bottom wall of the support beam (3) is fixedly connected with a row of screws (35) distributed along the length direction.

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