Chain tensioner

Abstract

The utility model provides a chain tensioner. The chain tensioner comprises a first adjusting part and a second adjusting part, the second adjusting part is movably connected with the first adjusting part; one end of the elastic piece is connected with the first adjusting piece, and the other end of the elastic piece is connected with the second adjusting piece; the multiple tensioning wheels are different in width, the second adjusting part is selectively and detachably connected with one of the multiple tensioning wheels, the tensioning wheels are constructed to be used for being connected with the chain in an abutting mode, and the tensioning wheels can rotate relative to the second adjusting part so as to adapt to transmission of the chains different in width size. According to the technical scheme, the chain tensioner can tension a plurality of chains with different widths, and is wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of chain transmission, in particular to a chain tensioner. Background Art

[0002] Chain drive is a meshing drive that uses a chain as a flexible pulling element between two or more sprockets. Chain drive is widely used in industrial production. Due to the large chain load, the chain links will be elongated after a certain period of operation and the operation will be unstable, resulting in the chain links being elongated and loose, and it is very easy to jump teeth, which has a serious impact on the stable operation of the equipment. The chain tensioner can compress the chain in real time to ensure the tension of the chain.

[0003] At present, the existing chain tensioner can only be applied to chains of a certain width, and the scope of application is relatively limited. Utility Model Content

[0004] The main purpose of the utility model is to provide a chain tensioner, which can solve the problem that the existing chain tensioner can only be applied to chains of a certain width.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a chain tensioner is provided, including: a first adjusting member; a second adjusting member movably connected to the first adjusting member; an elastic member, one end of the elastic member is connected to the first adjusting member, and the other end of the elastic member is connected to the second adjusting member; a plurality of tensioning wheels, the widths of the plurality of tensioning wheels are different, the second adjusting member is selectively detachably connected to one of the plurality of tensioning wheels, the tensioning wheel is constructed to abut against the chain, and the tensioning wheel is rotatable relative to the second adjusting member to adapt to the transmission of chains of different widths.

[0006] Furthermore, the chain tensioner further comprises a pre-tightening member, which is respectively connected to or abuts against the first adjusting member and the second adjusting member, and the pre-tightening member is configured to be able to tighten or loosen the first adjusting member and the second adjusting member.

[0007] Furthermore, the preload member is a bolt, one end of which is threadedly connected to one of the first adjusting member and the second adjusting member, and the other end of the bolt can abut against or separate from the other of the first adjusting member and the second adjusting member under the action of external force.

[0008] Furthermore, the first adjusting member and the second adjusting member are nested with each other, and the first adjusting member and the second adjusting member are slidably fitted together; the first adjusting member is a cylindrical structure, the cylindrical structure includes a circumferential side plate and a bottom plate connected to the circumferential side plate, and the elastic member and at least part of the second adjusting member are located inside the cylindrical structure.

[0009] Furthermore, the second adjusting member is slidably arranged inside the cylindrical structure, and the chain tensioner also includes a positioning structure, which includes a positioning groove and a positioning member slidably matched with the positioning groove. The positioning groove is opened on one of the first adjusting member and the second adjusting member, and the positioning member is connected to the other of the first adjusting member and the second adjusting member. The positioning groove is a long groove extending in the vertical direction.

[0010] Furthermore, the chain tensioner also includes a mounting structure for installing a tensioning wheel, and the mounting structure includes: an outer shell, which is connected to the second adjusting member, the outer shell defines an installation space and an opening connected to the installation space, and at least part of the tensioning wheel is located in the installation space; a rotating shaft, both ends of the rotating shaft are detachably connected to the outer shell, and the tensioning wheel is sleeved on the rotating shaft and rotatably connected to the rotating shaft.

[0011] Furthermore, the mounting structure also includes two bearings, which are respectively mounted at both ends of the tensioning wheel, the inner ring of each bearing is connected to the rotating shaft, and the outer ring of each bearing is connected to the tensioning wheel.

[0012] Furthermore, the tensioning wheel is a roller or a gear; and / or the first adjusting member is any one of a cylindrical, hexagonal, quadrilateral, and triangular shape, and the second adjusting member is any one of a cylindrical, hexagonal, quadrilateral, and triangular shape.

[0013] Furthermore, a mounting groove is provided on the outer circumference of the tension wheel, and the mounting groove extends around the circumference of the tension wheel, and the mounting groove is used for installing the chain.

[0014] Furthermore, a chamfer is provided between the outer peripheral surface of the tensioning wheel and the bottom of the assembly groove, and the angle range of the chamfer is 115° to 130°.

[0015] By applying the technical solution of the utility model, the chain is laid on the upper surface of the tensioning wheel, and under the action of the gravity of the chain, downward pressure can be applied to the second adjusting member, so that the elastic member is in a compressed state; as the chain is used, the chain stretches and relaxes, and the pressure applied to the second adjusting member decreases. The elastic member stretches and abuts against the chain under the action of the restoring force, and the chain can be tensioned continuously in real time. According to the different widths of the chain, the second adjusting member is selectively connected to one of the multiple tensioning wheels to ensure that the width of the tensioning wheel is the same as the width of the chain, avoiding the movement of the chain relative to the tensioning wheel, which leads to poor tensioning effect. In this way, the chain tensioner can tension multiple chains of different widths and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] In the figure:

[0018] Figure 1 A schematic structural diagram of a chain tensioner according to an embodiment of the utility model is shown;

[0019] Figure 2 Shows Figure 1 Schematic diagram of the chain tensioner from another angle.

[0020] The above drawings include the following reference numerals:

[0021] 1. First adjusting member; 10. Housing; 101. Installation space; 11. Circumferential side plate; 110. Positioning member; 12. Bottom plate; 2. Elastic member; 3. Preload member; 4. Positioning groove; 5. Second adjusting member; 6. Positioning screw; 7. Rotating shaft; 8. Tensioning wheel; 81. Assembly groove; 82. Chamfer; 9. Bearing. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] See also Figure 1 As shown, the utility model provides a chain tensioner, comprising: a first adjusting member 1; a second adjusting member 5, movably connected to the first adjusting member 1; an elastic member 2, one end of the elastic member 2 is connected to the first adjusting member 1, and the other end of the elastic member 2 is connected to the second adjusting member 5; a plurality of tensioning wheels 8, the widths of the plurality of tensioning wheels 8 are different, the second adjusting member 5 is selectively and detachably connected to one of the plurality of tensioning wheels 8, the tensioning wheel 8 is constructed to abut against the chain, and the tensioning wheel 8 is rotatable relative to the second adjusting member 5 to adapt to the transmission of chains of different widths.

[0024] In the above technical solution, the chain is laid on the upper surface of the tensioning wheel 8. Under the action of the gravity of the chain, downward pressure can be applied to the second adjusting member 5, so that the elastic member 2 is in a compressed state; as the chain is used, the chain stretches and relaxes, the pressure applied to the second adjusting member 5 decreases, and the elastic member 2 stretches under the action of the restoring force, so that the second adjusting member 5 abuts against the chain, and the chain can be continuously tensioned in real time.

[0025] Through the above arrangement, according to the different widths of the chain, the second adjusting member 5 is selectively connected to one of the multiple tensioning wheels 8, ensuring that the width of the tensioning wheel 8 is the same as the width of the chain, thereby preventing the chain from moving relative to the tensioning wheel 8, thereby causing a poor tensioning effect. In this way, the chain tensioner can tension multiple chains of different widths according to actual conditions, and has a wide range of applications.

[0026] Of course, in the embodiment of the utility model, the chain can also be abutted against the lower surface of the tensioning wheel 8, and the chain provides support for the tensioning wheel 8, so that the elastic member 2 is in an extended state. As the chain is used, the chain stretches and relaxes, and the elastic member 2 can contract under the action of the restoring force, so that the second adjusting member 5 is in contact with the chain, and the chain can be continuously tensioned in real time.

[0027] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the chain tensioner further includes a pre-tensioner 3, which is respectively connected or abutted with the first adjusting member 1 and the second adjusting member 5, and the pre-tensioner 3 is constructed to be able to tighten or loosen the first adjusting member 1 and the second adjusting member 5.

[0028] Through the above arrangement, the pre-tightening member 3 can detachably connect the first adjusting member 1 and the second adjusting member 5 , so that the elastic member 2 can be easily replaced.

[0029] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the preload member 3 is a bolt, one end of which is threadedly connected to one of the first adjusting member 1 and the second adjusting member 5, and the other end of the bolt can abut or separate from the other of the first adjusting member 1 and the second adjusting member 5 under the action of external force.

[0030] In the above technical solution, a threaded hole is opened on the first adjusting member 1, and a female thread for installing the preload member 3 is provided on the first adjusting member 1. The bolt is threadedly connected to the threaded hole and abuts against the second adjusting member 5, so that the first adjusting member 1 and the second adjusting member 5 can be detachably connected by the bolt.

[0031] In another embodiment of the present invention, the bolt may be threadedly connected to the second adjusting member 5 and abutted against or connected to the first adjusting member 1 .

[0032] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the first adjusting member 1 and the second adjusting member 5 are nested with each other, and the first adjusting member 1 and the second adjusting member 5 are slidingly matched; the first adjusting member 1 is a cylindrical structure, the cylindrical structure includes a circumferential side plate 11 and a bottom plate 12 connected to the circumferential side plate 11, and the elastic member 2 and at least part of the second adjusting member 5 are located inside the cylindrical structure.

[0033] In the above technical solution, the second adjusting member 5 is slidably arranged inside the cylindrical structure, one end of the elastic member 2 is connected to the bottom plate 12 of the first adjusting member 1, and the other end of the elastic member 2 is connected to the lower surface of the second adjusting member 5, and a threaded hole is opened on the circumferential side plate 11.

[0034] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the second adjusting member 5 is slidably arranged inside the cylindrical structure, and the chain tensioner also includes a positioning structure, the positioning structure includes a positioning groove 4 and a positioning member 110 slidably matched with the positioning groove 4, the positioning groove 4 is opened on one of the first adjusting member 1 and the second adjusting member 5, the positioning member 110 is connected to the other of the first adjusting member 1 and the second adjusting member 5, the positioning groove 4 is a long groove extending in the vertical direction, in one embodiment, the length of the second adjusting member 5 is 22 cm, and the length of the positioning groove 4 is 12 cm.

[0035] In the above technical solution, the positioning member 110 is a positioning pin, which is connected to the inner wall of the cylindrical structure, and the positioning groove 4 is provided on the outer wall of the second adjusting member 5 , so that when the second adjusting member 5 moves relative to the first adjusting member 1 , the positioning member 110 can slide and cooperate with the positioning groove 4 .

[0036] Through the above arrangement, the outer diameter of the positioning pin is matched with the inner diameter of the positioning groove 4, ensuring that the positioning pin can be inserted into the positioning groove 4 and can slide along the positioning groove 4. In this way, the first adjusting member 1 and the second adjusting member 5 can be limited by the positioning groove 4 to prevent the second adjusting member 5 from being laterally offset relative to the first adjusting member 1 (preventing the second adjusting member 5 from sliding along the positioning groove 4). Figure 1 left and right offset).

[0037] In one embodiment of the present invention, the chain tensioner includes two positioning structures, which are arranged at intervals in the circumferential direction of the cylindrical structure. Optionally, as Figure 2 As shown, the two positioning members 110 are symmetrically arranged relative to the central axis of the first adjusting member 1 . Similarly, the two positioning grooves 4 are also symmetrically arranged relative to the central axis of the first adjusting member 1 . The two positioning members 110 correspond to the two positioning grooves 4 one by one.

[0038] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the chain tensioner also includes a mounting structure for mounting a tensioning wheel 8, and the mounting structure includes: a housing 10, which is connected to the second adjusting member 5, the housing 10 defines an installation space 101 and an opening connected to the installation space 101, and at least part of the tensioning wheel 8 is located in the installation space 101; a rotating shaft 7, both ends of the rotating shaft 7 are detachably connected to the housing 10, and the tensioning wheel 8 is sleeved on the rotating shaft 7 and rotatably connected to the rotating shaft 7.

[0039] Through the above arrangement, the tension wheel 8 can rotate relative to the rotating shaft 7, which can reduce the friction between the tension wheel 8 and the chain, and facilitate the chain transmission. By detachably connecting the rotating shaft 7 and the housing 10, the tension wheel 8 is easy to replace.

[0040] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the mounting structure further includes two bearings 9, which are respectively mounted at both ends of the tensioning wheel 8, the inner ring of each bearing 9 is connected to the rotating shaft 7, and the outer ring of each bearing 9 is connected to the tensioning wheel 8.

[0041] Through the above arrangement, the tensioning wheel 8 can be rotatably connected to the rotating shaft 7 through the bearing 9.

[0042] In one embodiment of the present invention, the tension wheel 8 is a roller or a gear.

[0043] In an embodiment of the present invention, the first adjusting member 1 is in any one of a cylindrical, hexagonal, quadrilateral, and triangular shape, and the second adjusting member 5 is in any one of a cylindrical, hexagonal, quadrilateral, and triangular shape.

[0044] like Figure 1 and Figure 2 As shown, in the embodiment of the present utility model, a mounting groove 81 is provided on the outer circumference of the tension wheel 8. The mounting groove 81 extends around the circumference of the tension wheel 8, and the mounting groove 81 is used for installing the chain.

[0045] Through the above arrangement, the width of the assembly groove 81 is the same as the width of the chain, and the chain is clamped in the assembly groove 81, which can prevent the chain from being separated from the assembly groove 81.

[0046] like Figure 1 and Figure 2 As shown, in the embodiment of the present utility model, a chamfer 82 is provided between the outer circumference of the tension wheel 8 and the groove bottom of the assembly groove 81, and the angle range of the chamfer 82 is 115° to 130°.

[0047] The above arrangement facilitates the chain to enter the assembly groove 81, and the chamfer 82 can play a guiding role.

[0048] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the chain tensioner also includes two positioning screws 6, and positioning screws 6 are provided at both ends of the rotating shaft 7. Corresponding threaded holes are opened on the outer shell 10, and the positioning screws 6 are threadedly connected to the outer shell 10 so that the rotating shaft 7 and the outer shell 10 can be detachably connected.

[0049] In the embodiment of the utility model, when using the chain tensioner, first loosen the pre-tightening member 3, then compress the second adjusting member 5 into the first adjusting member 1, tighten the pre-tightening member 3 after compression, install the chain tensioner on the chain and loosen the pre-tightening member 3, and after the elastic force of the elastic member 2 pushes the second adjusting member 5 out, the tensioning wheel 8 is against the chain to achieve the purpose of tensioning the chain. The chain tensioner of the utility model can provide tension in real time, prevent the chain from jumping teeth, and effectively extend the maintenance cycle. The tensioning wheel 8 of different widths can be replaced as needed to be suitable for chains of different sizes.

[0050] From the above description, it can be seen that the above-mentioned embodiment of the utility model achieves the following technical effects: the chain is laid on the upper surface of the tensioning wheel 8, and under the action of the gravity of the chain, downward pressure can be applied to the second adjusting member, so that the elastic member is in a compressed state; as the chain is used, the chain stretches and relaxes, the pressure applied to the second adjusting member decreases, and the elastic member stretches and abuts against the chain under the action of the restoring force, so that the chain can be tensioned continuously in real time. According to the different widths of the chain, the second adjusting member is selectively connected to one of the multiple tensioning wheels 8 to ensure that the width of the tensioning wheel 8 is the same as the width of the chain, avoiding the chain moving relative to the tensioning wheel 8, which leads to the problem of poor tensioning effect. In this way, the chain tensioner can tension multiple chains of different widths and has a wide range of applications.

[0051] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A chain tensioner, characterized in that: include: A first adjusting member (1); A second adjusting member (5) movably connected to the first adjusting member (1); An elastic member (2), one end of the elastic member (2) being connected to the first adjusting member (1), and the other end of the elastic member (2) being connected to the second adjusting member (5); There are multiple tension wheels (8), and the widths of the multiple tension wheels (8) are different. The second adjusting member (5) is selectively detachably connected to one of the multiple tension wheels (8). The tension wheel (8) is constructed to abut against the chain. The tension wheel (8) is rotatable relative to the second adjusting member (5) to adapt to the transmission of the chain of different widths.

2. The chain tensioner according to claim 1, characterized in that: The chain tensioner further comprises a pre-tensioner (3), wherein the pre-tensioner (3) is respectively connected to or abuts against the first adjusting member (1) and the second adjusting member (5), and the pre-tensioner (3) is constructed to be able to tighten or loosen the first adjusting member (1) and the second adjusting member (5).

3. The chain tensioner according to claim 2, characterized in that: The pre-tightening member (3) is a bolt, one end of which is threadedly connected to one of the first adjusting member (1) and the second adjusting member (5), and the other end of which can abut against or separate from the other of the first adjusting member (1) and the second adjusting member (5) under the action of an external force.

4. The chain tensioner according to claim 1, characterized in that: The first adjusting member (1) and the second adjusting member (5) are nested with each other, and the first adjusting member (1) and the second adjusting member (5) are slidably fitted with each other; the first adjusting member (1) is a cylindrical structure, the cylindrical structure comprising a circumferential side plate (11) and a bottom plate (12) connected to the circumferential side plate (11), and the elastic member (2) and at least part of the second adjusting member (5) are located inside the cylindrical structure.

5. The chain tensioner according to claim 4, characterized in that: The second adjusting member (5) is slidably arranged inside the cylindrical structure. The chain tensioner also includes a positioning structure, which includes a positioning groove (4) and a positioning member (110) slidably matched with the positioning groove (4). The positioning groove (4) is opened on one of the first adjusting member (1) and the second adjusting member (5). The positioning member (110) is connected to the other of the first adjusting member (1) and the second adjusting member (5). The positioning groove (4) is a long groove extending in the vertical direction.

6. The chain tensioner according to any one of claims 1 to 5, characterized in that: The chain tensioner further comprises a mounting structure for mounting the tensioning wheel (8), the mounting structure comprising: a housing (10) connected to the second adjusting member (5), the housing (10) defining an installation space (101) and an opening communicating with the installation space (101), and at least a portion of the tensioning wheel (8) being located in the installation space (101); A rotating shaft (7), both ends of which are detachably connected to the housing (10); and the tensioning wheel (8) is sleeved on the rotating shaft (7) and rotatably connected to the rotating shaft (7).

7. The chain tensioner according to claim 6, characterized in that: The mounting structure further comprises two bearings (9), which are respectively mounted at two ends of the tension wheel (8), the inner ring of each bearing (9) being connected to the rotating shaft (7), and the outer ring of each bearing (9) being connected to the tension wheel (8).

8. The chain tensioner according to any one of claims 1 to 5, characterized in that: The tension wheel (8) is a roller or a gear; and / or the first adjusting member (1) is any one of a cylindrical, hexagonal, quadrilateral, and triangular shape, and the second adjusting member (5) is any one of a cylindrical, hexagonal, quadrilateral, and triangular shape.

9. The chain tensioner according to any one of claims 1 to 5, characterized in that: An assembly groove (81) is provided on the outer circumference of the tension wheel (8), and the assembly groove (81) extends around the circumference of the tension wheel (8). The assembly groove (81) is used to install the chain.

10. The chain tensioner according to claim 9, characterized in that A chamfer (82) is provided between the outer peripheral surface of the tension wheel (8) and the bottom of the assembly groove (81), and the angle range of the chamfer (82) is 115° to 130°.

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