Chain wrench

Abstract

The utility model discloses a chain wrench, which comprises a handle part (110), which is provided with a connecting end (111) and an operating end (112); the first end (121) of the chain part (120) is connected to the connecting end (111); the adjusting mechanism (130) is connected to the handle part (110), is connected with the second end (122) of the chain part (120) and is configured to be used for adjusting the size of the inner diameter of a clamping ring (123) defined between the first end (121) and the second end (122); wherein the clamping ring (123) is matched with the outer contour of the fastener (200).

Description

Technical Field

[0001] The utility model relates to the field of coal mine mechanical equipment, in particular to a chain wrench. Background Art

[0002] The environment in coal mines is humid, and steel equipment materials are prone to rust. At the same time, affected by hydrogen sulfide corrosion, etc., the surface screws of equipment are prone to rust and their strength decreases. Currently, an adjustable wrench is usually used to tighten and loosen nuts. During multiple tightening and loosening processes, the edges and corners of the nuts are easily damaged, and the hexagonal surface tends to become a circular surface. When using an adjustable wrench to tighten and loosen nuts, the effective contact area with the nut is small, the wrench cannot hold the nut, and the screw cannot be turned. In this case, in order to open the screw cap, powerful destruction means such as cutting and drilling are required, which will cause losses and waste of equipment and materials, and there are great safety risks in underwater gas welding operations. Summary of the Invention

[0003] In response to the problems and requirements raised above, this solution proposes a chain wrench, which can achieve the above technical objectives and bring many other technical effects due to the following technical features.

[0004] The utility model proposes a chain wrench, comprising:

[0005] A handle part having a connection end and an operation end;

[0006] A chain part, the first end of which is connected to the connection end;

[0007] An adjusting mechanism, connected to the handle part and connected to the second end of the chain part, configured to adjust the inner diameter size of the snap ring defined between the first end and the second end;

[0008] Wherein, the snap ring is adapted to the outer contour of the fastener.

[0009] In this technical solution, when using this chain wrench, connect the second end of the chain part to the adjusting mechanism, so that a shape adapted to the outer contour of the fastener (for example, a hexagonal bolt) is defined between the first end and the second end. Then, set this shape on the specified fastener, and then adjust the size of the shape defined by the first end and the second end by the adjusting mechanism, so that the shape fits and expands tightly with the fastener. Finally, the operator operates the handle part to tighten or remove the fastener. After the operation is completed, reverse-adjust the tightness of the adjusting mechanism so that the shape defined by the first end and the second end is separated from the fastener; the effective contact area between the chain part of this chain wrench and the nut is large, the snap ring can effectively hold the nut, it is convenient to turn the nut, greatly saving manpower and material resources, avoiding damage to the fastener and causing losses and waste of equipment and materials, and improving the safety of underground operations.

[0010] In addition, the chain wrench according to the utility model may also have the following technical features:

[0011] In one example of the present invention, the adjustment mechanism includes:

[0012] A threaded hole is provided along the extension direction of the handle portion;

[0013] A screw rod, which is matched with the threaded hole and has a through hole extending along the extension direction of the screw rod;

[0014] Wherein, the second end of the chain portion is penetrated by the penetration hole and connected to the screw rod, and the tightness of the chain portion can be adjusted by adjusting the position of the screw rod in the threaded hole.

[0015] In one example of the present invention, the adjustment mechanism further includes:

[0016] A mounting groove extends from the operating end toward the connecting end, and the mounting groove is coaxially arranged with the threaded hole; wherein the inner diameter of the mounting groove is larger than the inner diameter of the threaded hole;

[0017] The connecting block is adapted in the mounting groove and is fixedly connected to the second end of the chain portion.

[0018] In one example of the present invention, the connection block includes:

[0019] A connecting hole is provided along the extending direction of the connecting block, and the chain part is suitable for passing through the connecting hole;

[0020] A positioning hole is provided along the radial direction of the connection block which is perpendicular to the extending direction. When the chain portion passes through the connection hole, a positioning pin passes through the positioning hole and fixes the chain portion.

[0021] In an example of the present invention, the length dimension of the connection block is greater than the depth dimension of the installation slot, and the positioning hole is close to one end away from the installation slot and is located outside the installation slot.

[0022] In an example of the present invention, an operating handle is provided on a side of the screw rod close to the operating end, and the operating handle extends from the outer side wall of the screw rod in a direction away from the outer side wall of the screw rod.

[0023] In one example of the present invention, the threaded hole is close to a starting position of the first end of the chain portion on the connecting end of the handle portion.

[0024] In an example of the present utility model, the connection end between the chain part and the handle part is connected by a hinge, and there are at least two hinges, which are arranged at intervals along the transverse direction of the first end.

[0025] In an example of the present utility model, the connection points of at least two of the hinges and the center of the threaded hole are on the same straight line in the transverse direction.

[0026] In an example of the present utility model, the connection block is a cylindrical structure.

[0027] In the following, the optimal embodiments of implementing the present utility model will be described in more detail with reference to the accompanying drawings, so as to easily understand the features and advantages of the present utility model. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings of the embodiments of the present utility model will be briefly introduced below. Among them, the drawings are only used to show some embodiments of the present utility model, rather than limiting all embodiments of the present utility model thereto.

[0029] Figure 1 FIG. is a schematic structural diagram of a chain wrench according to an embodiment of the present utility model;

[0030] Figure 2 For Figure 1 The partial enlarged view at Q in;

[0031] Figure 3 FIG. is a perspective view of a chain wrench (hiding the chain part) according to an embodiment of the present utility model;

[0032] Figure 4 FIG. is an exploded view of a chain wrench (hiding the chain part) according to an embodiment of the present utility model;

[0033] Figure 5 FIG. is a schematic structural diagram of an adjusting mechanism according to an embodiment of the present utility model.

[0034] List of Reference Numerals:

[0035] Fastener 200;

[0036] Chain wrench 100;

[0037] Handle part 110;

[0038] Connection end 111;

[0039] Operating end 112;

[0040] Threaded hole 113;

[0041] Chain part 120;

[0042] The first end 121;

[0043] The second end 122;

[0044] The snap ring 123;

[0045] The adjusting mechanism 130;

[0046] The screw 131;

[0047] The through hole 132;

[0048] The mounting groove 133;

[0049] The connecting block 134;

[0050] The connecting hole 1341;

[0051] The positioning hole 1342;

[0052] The positioning pin 1343;

[0053] The operating handle 135;

[0054] The hinge 140;

[0055] The extending direction X;

[0056] The transverse direction Y. Detailed implementation manners

[0057] In order to make the objectives, technical solutions and advantages of the technical solutions of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present utility model. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0058] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present utility model pertains. The terms "first", "second" and similar terms used in the description and claims of the present utility model patent application do not denote any order, quantity or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "an" do not necessarily denote a quantity limitation. Terms such as "comprising" or "including" mean that the elements or items appearing before the term cover the elements or items listed after the term and their equivalents, without excluding other elements or items. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0059] According to one aspect of the present utility model, a chain wrench 100 is provided, as Figure 1 shown, comprising:

[0060] A handle portion 110 having a connection end 111 and an operating end 112;

[0061] A chain portion 120, the first end 121 of which is connected to the connection end 111;

[0062] An adjusting mechanism 130 connected to the handle portion 110 and connected to the second end 122 of the chain portion 120, configured to adjust the inner diameter size of a snap ring 123 defined between the first end 121 and the second end 122;

[0063] Wherein, a snap ring 123 adapted to the outer contour of a fastener 200 is defined between the first end 121 and the second end 122.

[0064] When using the chain wrench 100, connect the second end 122 of the chain portion 120 to the adjusting mechanism 130, so that a shape adapted to the outer contour of the fastener 200 (for example, a hexagon bolt) is defined between the first end 121 and the second end 122. Then, set this shape on the designated fastener 200, and then adjust the size of the shape defined by the first end 121 and the second end 122 by the adjusting mechanism 130, so that the shape fits the fastener 200 until it is tightened. Finally, the operator operates the handle portion 110 to tighten or remove the fastener 200. After the operation is completed, reverse-adjust the tightness of the adjusting mechanism 130 so that the shape defined by the first end 121 and the second end 122 is separated from the fastener 200. The chain portion 120 of the chain wrench 100 has a large effective contact area with the nut, and the snap ring 123 can effectively hold the nut, making it convenient to turn the nut, greatly saving manpower and material resources, avoiding damage to the fastener and causing losses and waste of equipment and materials, and improving the safety of underground operations.

[0065] In an example of the present utility model, as Figures 2 to 5 shown, the adjusting mechanism 130 includes:

[0066] A threaded hole 113 opened along the extension direction X of the handle portion 110;

[0067] A screw rod 131, which is adapted to the threaded hole 113 and has a through hole 132 opened along the extension direction X of the screw rod 131;

[0068] Wherein, the second end 122 of the chain portion 120 passes through the through hole 132 and is connected to the screw rod 131, and the tightness of the chain portion 120 is adjusted by adjusting the position of the screw rod 131 in the threaded hole 113;

[0069] That is to say, by rotating the screw rod 131 forward or backward, the screw rod 131 can move forward or backward (up and down) in the threaded hole 113, and the chain portion 120 is connected to the screw rod 131, so that the screw rod 131 will drive the chain to move up and down synchronously during the movement, and then the size of the shape formed between the first end 121 and the second end 122 of the chain portion 120 is realized, and finally the tightness adjustment of the chain portion 120 is realized, greatly improving the adjustment of the adjusting snap ring 123 of the adjusting mechanism 130; Since the second end 122 of the chain portion 120 can be flexibly adjusted under the action of the adjusting mechanism 130, the adaptability of the chain wrench 100 is improved.

[0070] In an example of the present utility model, as Figure 2 、 Figure 4 and Figure 5 shown, the adjusting mechanism 130 further includes:

[0071] The installation groove 133 extends from the operation end 112 towards the connection end 111, and the installation groove 133 is coaxially arranged with the threaded hole 113; wherein, the inner diameter dimension of the installation groove 133 is larger than the inner diameter dimension of the threaded hole 113;

[0072] The connection block 134 is adapted to be in the installation groove 133, and is fixedly connected to the second end 122 of the chain portion 120; it can be understood that the outer diameter of the connection block 134 is larger than the inner diameter of the threaded hole 113 and smaller than the inner diameter of the installation groove 133, so that the connection block 134 can be adapted to be in the installation groove 133;

[0073] Specifically, the connection block 134 is movably arranged in the installation groove 133 and is fixedly connected to the second end 122 of the chain portion 120, so as to realize the connection between the chain portion 120 and the screw 131. When the screw 131 rotates, relative rotation can occur between the screw 131 and the connection block 134, that is, the connection block 134 does not rotate under the connection action of the chain portion 120, and the screw 131 rotates relative to itself with respect to the connection block 134. In this way, the rotational motion of the screw 131 can be converted into the linear movement of the connection block 134 along the extending direction X of the screw 131 to tighten the chain portion 120.

[0074] In an example of the present utility model, as Figure 2 and Figure 4 shown, the connection block 134 includes:

[0075] The connection hole 1341 opened along the extending direction X of the connection block 134, and the chain portion 120 is adapted to pass through the connection hole 1341;

[0076] The positioning hole 1342 opened along the radial direction of the connection block 134 perpendicular to the extending direction X. When the chain portion 120 passes through the connection hole 1341, the positioning pin 1343 passes through the positioning hole 1342 and fixes the chain portion 120;

[0077] Preferably, the connection block 134 is of a cylindrical structure.

[0078] Briefly, the chain part 120 passes through the connecting hole 1341, and the positioning pin 1343 passes through the chain part 120 via the positioning hole 1342, thereby fixedly connecting the chain part 120 and the connecting block 134. In this way, when the screw 131 makes a rotational movement, for example, rotating forward, the screw 131 moves in a direction away from the threaded hole 113, thereby driving the connecting block 134 to move away from the threaded hole 113 synchronously, and finally tightening the chain part 120; conversely, when it is necessary to remove the chain wrench 100, rotate the screw 131 in the reverse direction, and the screw 131 moves in a direction close to the threaded hole 113, thereby driving the connecting block 134 to move close to the threaded hole 113 synchronously, and finally removing the chain part 120 from the fastener 200.

[0079] It can be understood that the inner diameter dimension of the connecting hole 1341 is equal to the inner diameter dimension of the through hole 132, and both are larger than the maximum outer contour dimension of the chain part 120.

[0080] In an example of the present utility model, as Figure 2 、 Figure 3 and Figure 5 shown, the length dimension of the connecting block 134 is larger than the depth dimension of the installation groove 133, and the positioning hole 1342 is close to one end away from the installation groove 133 and is located outside the installation groove 133;

[0081] By making the length dimension of the connecting block 134 larger than the depth dimension of the installation groove 133, it can be ensured that a part of the connecting block 134 is located outside the installation groove 133, which provides conditions for the opening of the positioning hole 1342, and setting the positioning hole 1342 in the part of the connecting block 134 located outside the installation groove 133 facilitates the fitting installation between the positioning pin 1343 and the positioning hole 1342.

[0082] When using the chain wrench 100, first roughly fix it on the connecting block 134 according to the size of the fastener 200 to be screwed, and then adjust the tightness of the chain part 120 through the adjusting mechanism 130.

[0083] In an example of the present utility model, as Figures 1 to 5 shown, an operating handle 135 is provided on the side of the screw 131 close to the operating end 112, and the operating handle 135 extends from the outer side wall of the screw 131 in a direction away from the outer side wall of the screw 131;

[0084] By providing the operating handle 135, it is convenient to screw the screw 131 in the threaded hole 113.

[0085] In an example of the present utility model, a plurality of operating handles 135 are provided and are arranged at intervals along the circumferential direction of the screw 131.

[0086] In an example of the present utility model, as Figure 1 shown, the starting position of the first end 121 of the threaded hole 113 close to the chain portion 120 on the connection end 111 of the handle portion 110. Bringing the first end 121 of the chain portion 120 closer to the threaded hole 113 can cause the chain portion 120 to form a closed snap ring 123 as much as possible, greatly increasing the contact area between the chain portion 120 and the fastener 200, thereby more effectively disassembling and assembling the fastener 200.

[0087] In an example of the present utility model, the connection between the chain portion 120 and the connection end 111 of the handle portion 110 is connected by a hinge 140. There are at least two hinges 140, and they are arranged at intervals along the transverse direction Y of the first end 121. Among them, the transverse direction Y and the extending direction X are perpendicular to each other.

[0088] For example, there are two hinges 140, arranged at intervals along the transverse direction Y of the first end 121, and the threaded hole 113 is close to the hinge 140. In this way, the chain portion 120 can effectively form a substantially sealed snap ring 123, greatly increasing the contact area between the chain portion 120 and the fastener 200. Arranging at least two hinges 140 can also improve the connection reliability between the chain portion 120 and the handle portion 110.

[0089] In an example of the present utility model, the connection points of at least two of the hinges 140 and the center of the threaded hole 113 are on the same straight line in the transverse direction Y;

[0090] That is to say, the connection points of the hinge 140 and the center of the threaded hole 113 are on the same straight line in the transverse direction Y. In this way, the snap ring 123 formed by the chain portion 120 can be located in the same plane, so as to better match with the fastener 200.

[0091] In the above text, the exemplary embodiments of the chain wrench 100 proposed by the present utility model are described in detail with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present utility model, various modifications and variations can be made to the above specific embodiments, and various combinations can be made to the various technical features and structures proposed by the present utility model, without exceeding the protection scope of the present utility model. The protection scope of the present utility model is determined by the appended claims.

Claims

1. A chain wrench, characterized in that: include: A handle portion (110) having a connection end (111) and an operating end (112); A chain portion (120), a first end (121) of which is connected to the connecting end (111); an adjustment mechanism (130), connected to the handle portion (110) and connected to the second end (122) of the chain portion (120), and configured to adjust the size of the inner diameter of the snap ring (123) defined between the first end (121) and the second end (122); The clamping ring (123) is adapted to the outer contour of the fastener (200).

2. The chain wrench according to claim 1, characterized in that: The adjustment mechanism (130) comprises: A threaded hole (113) provided along an extension direction (X) of the handle portion (110); A screw rod (131) adapted to the threaded hole (113), and having a through hole (132) extending along an extension direction (X) of the screw rod (131); The second end (122) of the chain portion (120) is penetrated by the penetration hole (132) and connected to the screw rod (131), and the tightness of the chain portion (120) can be adjusted by adjusting the position of the screw rod (131) in the threaded hole (113).

3. The chain wrench according to claim 2, characterized in that: The adjustment mechanism (130) further includes: A mounting groove (133) extends from the operating end (112) toward the connecting end (111), and the mounting groove (133) is coaxially arranged with the threaded hole (113); wherein the inner diameter of the mounting groove (133) is greater than the inner diameter of the threaded hole (113); A connecting block (134) is adapted to fit in the mounting groove (133) and is fixedly connected to the second end (122) of the chain portion (120).

4. The chain wrench according to claim 3, characterized in that: The connection block (134) comprises: A connection hole (1341) is provided along an extension direction (X) of the connection block (134), the chain portion (120) being suitable for passing through the connection hole (1341); A positioning hole (1342) is provided along a radial direction of the connection block (134) perpendicular to the extension direction (X); when the chain portion (120) passes through the connection hole (1341), a positioning pin (1343) passes through the positioning hole (1342) and fixes the chain portion (120).

5. The chain wrench according to claim 4, characterized in that: The length dimension of the connection block (134) is greater than the depth dimension of the installation groove (133), and the positioning hole (1342) is close to an end away from the installation groove (133) and is located outside the installation groove (133).

6. The chain wrench according to claim 2, characterized in that: An operating handle (135) is provided on a side of the screw rod (131) close to the operating end (112), and the operating handle (135) extends from the outer side wall of the screw rod (131) in a direction away from the outer side wall of the screw rod (131).

7. The chain wrench according to claim 2, characterized in that: The threaded hole (113) is located close to a starting position of the first end (121) of the chain portion (120) on the connecting end (111) of the handle portion (110).

8. The chain wrench according to claim 2, characterized in that: The chain portion (120) is connected to the connecting end (111) of the handle portion (110) via a hinge (140), and the hinges (140) include at least two hinges (140) which are arranged at intervals along a transverse direction (Y) of the first end (121).

9. The chain wrench according to claim 8, characterized in that: The connection points of at least two of the hinges (140) and the center of the threaded hole (113) are on the same straight line in the transverse direction (Y).

10. The chain wrench according to claim 3, characterized in that: The connecting block (134) is a cylindrical structure.

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