Chain connecting rod capable of adjusting tensile force

Abstract

The utility model discloses a chain connecting rod capable of adjusting tensile force. The chain connecting rod comprises a spring, a fixing screw rod, an adjusting screw rod and a fixing sleeve. One end of the spring is connected with the chain through the connecting block, the other end of the spring is connected with the adjusting screw, the fixing screw is arranged at one end of the fixing sleeve, the joint of the spring and the adjusting screw is located in the fixing sleeve, and a scale display assembly is arranged on the side of the fixing sleeve to display elastic force changes of the spring. The adjusting screw rod penetrates through the inner side of the fixing screw rod in a threaded connection mode, the outer side of the fixing screw rod is connected with a component to be pulled, and locking is achieved through the fixing nut; when the adjusting screw rod is screwed, the spring is driven to stretch, and then chain tensioning is achieved. The tensioning force adjusting device has the advantages of being compact in structure, easy to operate, high in reliability and the like, tensioning force adjusting is achieved, the elastic force change of the spring can be mastered in real time, and the accuracy of tensioning force adjusting is improved.

Description

Technical Field

[0001] This utility model belongs to the field of chain drive technology, specifically relating to an adjustable tension chain connecting rod. Background Technology

[0002] Chain drives are widely used in conveyor chains, pulling, and traction mechanisms. However, chains tend to loosen after a period of use, so tensioners are often used to tighten them. But tensioners are usually adjusted based on experience and cannot be adjusted to a specific torque. As a result, excessive tensioning often leads to excessive wear and damage to bearings, connecting shafts, and other parts, significantly reducing their service life. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an adjustable tension chain connecting rod that is compact in structure, simple to operate and highly reliable, in order to overcome the shortcomings of the existing technology.

[0004] To achieve the above objectives, the present invention may adopt the following technical solution:

[0005] An adjustable tension chain connecting rod includes: a connecting block, a fixing screw, an adjusting screw, a fixing nut, a fixing sleeve, and a spring; one end of the spring is connected to the chain via the connecting block, and the other end of the spring is connected to the adjusting screw; the fixing screw is disposed at one end of the fixing sleeve, and the connection between the spring and the adjusting screw is located inside the fixing sleeve; the side of the fixing sleeve is provided with a scale display component to display the change in spring force; the adjusting screw passes through the inner side of the fixing screw via a threaded connection, and the outer side of the fixing screw is connected to the component to be pulled and locked by the fixing nut; when the adjusting screw is turned, the spring is stretched, thereby achieving chain tensioning.

[0006] As a further improvement of this utility model, the scale display component includes a digital scale and a transparent magnetic fluid tube, with the digital scale and the magnetic fluid tube arranged side by side on the side of the fixed sleeve; a magnet is provided at one end of the adjusting screw connected to the spring; when the adjusting screw drives the spring to stretch, the magnetic fluid in the magnetic fluid tube moves with the magnet and is displayed at the corresponding digital scale.

[0007] As a further improvement of this utility model, it also includes a locking sleeve, the spring is located inside the locking sleeve, one end of the connecting block passes through the locking sleeve and is connected to the spring, the other end of the fixing sleeve is nested inside the locking sleeve, and the locking sleeve is provided with external threads and a locking nut on the outside; when the spring is stretched to a preset length, the locking nut is screwed on to lock the locking sleeve and the fixing sleeve together.

[0008] As a further improvement of this utility model, one end of the locking sleeve is provided with a through hole, the connecting block passes through the through hole, and the connecting block can rotate freely within the through hole.

[0009] As a further improvement of this utility model, the other end of the locking sleeve is provided with two expansion grooves symmetrically, and the depth of the expansion grooves matches the length of the external thread; when the locking nut is tightened, the expansion grooves close or open, so as to achieve the inner side of the locking sleeve to press or loosen the fixing sleeve.

[0010] As a further improvement of this utility model, the inner side of the locking sleeve end is provided with a slope β to achieve locking between the inner side of the locking sleeve end and the fixed sleeve.

[0011] As a further improvement of this utility model, the spring is made of SUS631 stainless steel.

[0012] As a further improvement of this utility model, the magnetohydrodynamic tube is made of glass.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This utility model discloses an adjustable tension chain connecting rod. One end of a spring is connected to the chain via a connecting block, and the other end is connected to an adjusting screw. The adjusting screw is threaded through the inside of a fixed screw, and the outside of the fixed screw is connected to the component to be pulled. This achieves the connection between the chain and the component to be pulled. By turning the adjusting screw, the spring is stretched, thus adjusting the tension torque—simple and reliable. Simultaneously, one end of the fixed screw is connected and fixed to one end of a fixed sleeve. The connection between the spring and the adjusting screw is located inside the fixed sleeve. A scale display component is provided on the side of the fixed sleeve. When the adjusting screw stretches the spring, the scale display component can display the change in spring force in real time. This achieves both tension torque adjustment and real-time monitoring of spring force changes, improving the accuracy of tension adjustment and effectively preventing damage to parts due to excessive tension torque, thus extending the service life of the parts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the structural principle of the adjustable tension chain connecting rod in a specific embodiment of this utility model;

[0016] Figure 2 This is a schematic diagram illustrating the connection principle of the spring, connecting block, and adjusting screw in a specific embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the locking sleeve in a specific embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the locking sleeve in a specific embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram illustrating the assembly structure principle of the locking sleeve in a specific embodiment of the present utility model;

[0020] Figure 6 This is a schematic diagram illustrating the structural principle of the fixed sleeve in a specific embodiment of this utility model;

[0021] Legend: 1. Connecting block; 2. Locking sleeve; 3. Magnetorheological fluid tube; 4. Fixing screw; 5. Adjusting screw; 6. Fixing nut; 7. Fixing sleeve; 8. Locking nut; 9. Spring; 10. Magnet; 21. Expansion groove; 22. Through hole; 71. Tube groove. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0023] In the description of this utility model, it should be understood that the terms "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0025] Example

[0026] like Figures 1 to 6As shown, the adjustable tension chain connecting rod of this utility model includes: a connecting block 1, a fixing screw 4, an adjusting screw 5, a fixing nut 6, a fixing sleeve 7, and a spring 9. One end of the spring 9 is connected to the chain through the connecting block 1, and the other end of the spring 9 is connected to the adjusting screw 5. The fixing screw 4 is located at one end of the fixing sleeve 7, and the interior of the fixing screw 4 is interconnected with the interior of the fixing sleeve 7. The connection between the spring 9 and the adjusting screw 5 is located inside the fixing sleeve 7. A scale display component is provided on the side of the fixing sleeve 7 to display the change in the elastic force of the spring 9. Figure 6 As shown, the fixing screw 4 has an internal thread and an external thread. The adjusting screw 5 passes through the inside of the fixing screw 4 and extends into the fixing sleeve 7 via a threaded connection. The outside of the fixing screw 4 is threaded to the component to be pulled (such as a scanning carriage) via an external thread and is locked by a fixing nut 6. When the adjusting screw 5 is turned, the spring 9 is stretched, thereby achieving chain tensioning.

[0027] In this embodiment, the spring 9 is made of SUS631 stainless steel, which has the characteristics of high connection strength, good wear resistance and high elasticity.

[0028] In this embodiment, one end of the spring 9 is connected to the chain via the connecting block 1, and the other end is connected to the adjusting screw 5. The adjusting screw 5 is threaded through the inside of the fixed screw 4, and the outside of the fixed screw 4 is connected to the component to be pulled. This achieves the connection between the chain and the component to be pulled. By turning the adjusting screw 5, the spring 9 can be stretched, thereby achieving tension torque adjustment, which is simple and reliable. At the same time, one end of the fixed screw 4 is also connected and fixed to one end of the fixed sleeve 7. Moreover, the connection between the spring 9 and the adjusting screw 5 is located inside the fixed sleeve 7. A scale display component is provided on the side of the fixed sleeve 7. When the adjusting screw 5 stretches the spring 9, the scale display component can display the change in the elastic force of the spring 9 in real time. This achieves tension torque adjustment and allows for real-time monitoring of the spring's elastic force changes, improving the accuracy of tension adjustment and effectively preventing damage to parts due to excessive tension torque, thus extending the service life of the parts.

[0029] like Figure 6 As shown, the scale display assembly includes a digital scale and a transparent magnetofluid tube 3. A groove 71 for mounting the magnetofluid tube 3 is provided on the side of the fixing sleeve 7, and the digital scale and the magnetofluid tube 3 are arranged side-by-side on the side of the fixing sleeve 7. Figure 2 As shown, a magnet 10 is provided at one end of the adjusting screw 5 connected to the spring 9. When the adjusting screw 5 causes the spring 9 to stretch, the magnetic fluid in the magnetic fluid tube 3 moves with the magnet 10 and is displayed at the corresponding digital scale.

[0030] Furthermore, the magnetofluid tube 3 is made of glass, and a small amount of magnetofluid is placed inside the glass tube to facilitate observation of the movement of the magnetofluid inside the tube.

[0031] like Figure 1 As shown, the chain connecting rod also includes a locking sleeve 2, a spring 9 located inside the locking sleeve 2, one end of the connecting block 1 passing through the locking sleeve 2 and connected to the spring 9, and the other end of the fixing sleeve 7 nested inside the locking sleeve 2. The locking sleeve 2 has external threads and a locking nut 8 on its outer side. When the spring 9 is stretched to a preset length, the locking nut 8 is tightened to lock the locking sleeve 2 and the fixing sleeve 7 together.

[0032] like Figure 4 As shown, one end of the locking sleeve 2 is provided with a through hole 21, the connecting block 1 passes through the through hole 21, and the connecting block 1 can rotate freely in the through hole 21 so that the spring 9 can extend as the adjusting nut 5 is turned.

[0033] like Figure 3 and Figure 4 As shown, the other end of the locking sleeve 2 is symmetrically provided with two expansion grooves 22, the depth of which matches the length of the external thread. When the locking nut 8 is tightened, the expansion grooves 22 close or open, thereby pressing or loosening the fixing sleeve 7 inside the locking sleeve 2. Figure 5 As shown, when the locking nut 8 is turned in the direction of the arrow in the figure, the inner side of the locking sleeve 2 presses against the fixing sleeve 7.

[0034] like Figure 4 As shown, the inner side of the locking sleeve 2 is provided with a ramp β to lock the inner side of the locking sleeve 2 with the fixed sleeve 7. Furthermore, the height of the ramp β is about 0.5mm, which can lock the fixed sleeve 7 without affecting the relative movement between the locking sleeve 2 and the fixed sleeve 7.

[0035] In this embodiment, the entire connecting rod assembly is fixed to the component to be pulled (such as a scanning carriage) by fixing the nut 6 and the fixing screw 4 on the side of the fixing sleeve 7. The length of the spring 9 can be adjusted by rotating the adjusting screw 5. When the chain needs to be tightened, the adjusting screw 5 is rotated to lengthen the spring 9. Under the action of tension, the spring 9 is stretched. Since the chain has a certain degree of slack, the locking sleeve 2 will also move forward a certain distance, and a relative displacement will occur between the locking sleeve 2 and the fixing sleeve 7. The scale number on the fixing sleeve 7 is the elastic force indication corresponding to the spring 9. The difference between the scale number corresponding to the magnetohydrodynamic fluid on the side of the fixing sleeve 7 and the scale number corresponding to the locking sleeve 2 on the side of the fixing sleeve 7 is the tension of the chain at this time.

[0036] Once the tension reaches the expected elastic force, tighten the locking nut 8 to lock the locking sleeve 2 and the fixing sleeve 7 in place, preventing relative displacement during movement.

[0037] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the spirit and technical essence of the present invention. Therefore, any simple modifications, equivalent substitutions, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the technical solutions of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A chain connecting rod with adjustable tension, characterized in that, include: The assembly includes a connecting block (1), a fixing screw (4), an adjusting screw (5), a fixing nut (6), a fixing sleeve (7), and a spring (9). One end of the spring (9) is connected to the chain via the connecting block (1), and the other end of the spring (9) is connected to the adjusting screw (5). The fixing screw (4) is located at one end of the fixing sleeve (7), and the connection between the spring (9) and the adjusting screw (5) is located inside the fixing sleeve (7). The side of the fixing sleeve (7) is provided with a scale display component to display the change in the elastic force of the spring (9). The adjusting screw (5) is threaded through the inside of the fixing screw (4), and the outside of the fixing screw (4) is connected to the component to be pulled and locked by the fixing nut (6). When the adjusting screw (5) is turned, the spring (9) is stretched, thereby achieving chain tensioning.

2. The adjustable tension chain connecting rod according to claim 1, characterized in that, The scale display component includes a digital scale and a transparent magnetic fluid tube (3), which are arranged side by side on the side of the fixed sleeve (7); the end of the adjusting screw (5) connected to the spring (9) is provided with a magnet (10); when the adjusting screw (5) drives the spring (9) to stretch, the magnetic fluid in the magnetic fluid tube (3) moves with the magnet (10) and is displayed at the corresponding digital scale.

3. The adjustable tension chain connecting rod according to claim 2, characterized in that, It also includes a locking sleeve (2), the spring (9) is located inside the locking sleeve (2), one end of the connecting block (1) passes through the locking sleeve (2) and is connected to the spring (9), the other end of the fixing sleeve (7) is nested inside the locking sleeve (2), and the locking sleeve (2) is provided with external threads and a locking nut (8) on the outside; when the spring (9) is stretched to a preset length, the locking nut (8) is screwed on to lock the locking sleeve (2) and the fixing sleeve (7) together.

4. The adjustable tension chain connecting rod according to claim 3, characterized in that, One end of the locking sleeve (2) is provided with a through hole (21), the connecting block (1) passes through the through hole (21), and the connecting block (1) can rotate freely in the through hole (21).

5. The adjustable tension chain connecting rod according to claim 4, characterized in that, The other end of the locking sleeve (2) is provided with two expansion grooves (22) symmetrically. The depth of the expansion grooves (22) matches the length of the external thread. When the locking nut (8) is tightened, the expansion grooves (22) close or open to achieve the inner side of the locking sleeve (2) pressing or loosening the fixing sleeve (7).

6. The adjustable tension chain connecting rod according to claim 5, characterized in that, The locking sleeve (2) has a ramp β on the inner side of its end to lock the inner side of the locking sleeve (2) with the fixing sleeve (7).

7. The adjustable tension chain connecting rod according to any one of claims 1 to 6, characterized in that, The spring (9) is made of SUS631 stainless steel.

8. The adjustable tension chain connecting rod according to any one of claims 2 to 6, characterized in that, The magnetohydrodynamic tube (3) is made of glass.

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