Adjustable labor-saving spring pulling tool

Abstract

The utility model discloses an adjustable labor-saving type spring pulling tool which comprises a main rod and a pull rod, the main rod is provided with an operation part, an abutting part and a hinge part, the operation part and the abutting part are arranged at the two ends of the main rod respectively, and the hinge part is located on the peripheral side of the main rod and close to the abutting part; the pull rod is of a length-adjustable telescopic rod structure, a hooking part and a connecting part are arranged at the two ends of the pull rod respectively, and the connecting part is hinged to the hinge part so that the pull rod can rotate relative to the main rod. The length-adjustable telescopic rod structure is introduced, so that the pull rod can be accurately adjusted according to the specification and the stretching requirement of the spring, the stretching precision and stability are ensured, the tool can adapt to springs of various specifications and types, and the universality and the flexibility of the tool are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical tools, and in particular to an adjustable, force-saving tension spring tool. Background Technology

[0002] Traditional spring tensioning methods are mainly manual, where workers stretch the springs directly with their hands or simple tools. This method has many drawbacks, such as low efficiency, high labor intensity, and difficulty in ensuring accuracy. Nowadays, spring tensioning tools are designed using the lever principle, which can achieve labor-saving operation. However, existing spring tensioning tools lack precision control, making it difficult to meet the needs of high-precision spring tensioning. Furthermore, their applicability is limited, making it difficult to meet the tensioning requirements of springs of different specifications and types. Utility Model Content

[0003] The purpose of this utility model is to provide an adjustable and labor-saving tension spring tool that can adapt to the tensioning needs of springs of different specifications and types. It can be precisely adjusted according to the specifications of the spring and the tensioning needs, thereby ensuring the accuracy and stability of the tensioning, and solving one or more technical problems existing in the prior art.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0005] This utility model provides an adjustable, force-saving tension spring tool, comprising:

[0006] The main rod is provided with an operating part, an abutment part and a hinge part. The operating part and the abutment part are respectively located at both ends of the main rod, and the hinge part is located on the outer periphery of the main rod and close to the abutment part.

[0007] The pull rod is a telescopic rod structure with adjustable length. The two ends of the pull rod are respectively provided with a hook part and a connecting part. The connecting part is hinged to the hinge part so that the pull rod can rotate relative to the main rod.

[0008] The beneficial effects of the utility model are:

[0009] In use, first adjust the extension length of the pull rod according to the specifications and length requirements of the spring to be stretched. Place the abutment part on the main rod against the external fixed surface, and hook the hook part on the pull rod onto the spring joint. Press down the operating part on the main rod in the stretching direction of the spring. The main rod pulls the pull rod in the stretching direction of the spring, using the lever principle to lengthen the spring so that the spring head can be inserted between the spring clips. This invention places the hinge part near the abutment part, optimizing the lever design for more efficient force transmission, further reducing the force required for operation and shortening the operation time. By introducing an adjustable telescopic rod structure, the pull rod can be precisely adjusted according to the specifications and stretching requirements of the spring, thereby ensuring the accuracy and stability of the stretching. It can adapt to various specifications and types of springs, improving the tool's versatility and flexibility.

[0010] As a further improvement to the above technical solution, the abutting part is provided with at least one foot pad, which is a soft component.

[0011] As a further improvement to the above technical solution, the abutment part is also provided with an installation handle, at least one of the foot pads is rotatably installed on the installation handle, and the foot pads are arranged parallel to the rotation axis of the pull rod.

[0012] As a further improvement to the above technical solution, the middle part of the mounting handle is vertically connected to the main rod, and the foot pads are rotatably mounted on both ends of the mounting handle.

[0013] As a further improvement to the above technical solution, the connecting part is provided with an eccentric protrusion that is eccentrically arranged with respect to the rotation axis of the pull rod. The eccentric protrusion is configured such that when the pull rod rotates to overlap with the outer periphery of the main rod, the outer side of the eccentric protrusion presses against the outer periphery of the main rod to lock the rotation of the pull rod.

[0014] As a further improvement to the above technical solution, the outer peripheral wall of the eccentric protrusion is an arc surface.

[0015] As a further improvement to the above technical solution, the hinge part includes a hinge frame and a hinge shaft. The hinge frame is fixed to the outer periphery of the main rod. The connecting part is also provided with a hinge hole. The eccentric protrusion is eccentrically arranged with respect to the hinge hole. The hinge shaft is connected between the hinge frame and the hinge hole.

[0016] As a further improvement to the above technical solution, the hinge shaft includes a bolt and a nut, the hinge frame includes two clamping pieces arranged at relative intervals along the circumference of the main rod, the connecting part is disposed between the two clamping pieces, and the bolt passes through the two clamping pieces and the hinge hole and is threadedly connected to the nut.

[0017] As a further improvement to the above technical solution, the operating part includes an operating handle connected to the main rod.

[0018] As a further improvement to the above technical solution, the pull rod includes an adjusting rod and a rotating rod that are slidably sleeved together. The outer peripheral wall of the rotating rod is provided with a plurality of pin holes spaced apart along the axial direction. The outer peripheral wall of the adjusting rod is provided with a pressing pin head, which is engaged with the pin holes.

[0019] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0021] Figure 1 This is a schematic diagram of one embodiment of the adjustable, force-saving tension spring tool provided by this utility model;

[0022] Figure 2 This is an exploded view of an embodiment of the adjustable, force-saving tension spring tool provided by this utility model;

[0023] Figure 3 This is a cross-sectional view of the adjustable and force-saving tension spring tool provided by this utility model, in which the pull rod is in the working state.

[0024] Figure 4 This is a cross-sectional view of an embodiment of the adjustable and force-saving tension spring tool provided by this utility model, in which the pull rod is in a retracted state.

[0025] Figure 5 This is a schematic diagram of the usage state of an embodiment of the adjustable and force-saving tension spring tool provided by this utility model;

[0026] Figure 6 yes Figure 5 A magnified view of part A in the middle;

[0027] Icon labels:

[0028] Main rod 100; operating part 110; operating handle 111; abutment part 120; foot pad 121; mounting handle 122; hinge part 130; hinge frame 131; clamp 1311; hinge shaft 132; bolt 1321; nut 1322; first end rod section 140; intermediate rod section 150; second end rod section 160;

[0029] Pull rod 200; hook part 210; connecting part 220; eccentric protrusion 221; hinge hole 222; adjusting rod 230; press-type pin head 231; rotating rod 240; pin hole 241. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0035] Traditional spring-stretching methods are mainly manual, where workers directly stretch the springs using their hands or simple tools. In practice, existing technologies have many shortcomings. For example, existing spring-stretching tools designed using the lever principle still have room for improvement in operational efficiency. Although these tools can achieve labor-saving effects, they still require considerable force when stretching large or high-elasticity springs, and the operation process can be time-consuming. They also lack precision control, making it difficult to meet the needs of high-precision spring stretching. Their applicability is limited, and they cannot meet the stretching requirements of springs of different specifications and types. Therefore, finding an efficient and labor-saving spring-stretching tool has become an urgent need in the industry.

[0036] This utility model proposes an adjustable and labor-saving tension spring tool that can adapt to the tensioning needs of springs of different specifications and types. It can be precisely adjusted according to the specifications of the spring and the tensioning requirements, thereby ensuring the accuracy and stability of the tensioning and saving more effort.

[0037] like Figure 1 As shown, the tension spring tool of this utility model includes: a main rod 100 and a pull rod 200.

[0038] In this embodiment, the main rod 100 has a rod-type structure. The main rod 100 is provided with an operating part 110, an abutment part 120, and a hinge part 130. The operating part 110 and the abutment part 120 are respectively provided at both ends of the main rod 100, while the hinge part 130 is provided on the outer periphery between the two ends of the main rod 100. The abutment part 120 is used to abut against the external fixed surface to serve as one of the rotation points in the lever, while the hinge part 130 is used to connect with the pull rod 200 to serve as the other rotation point in the lever. The operating part 110 is used to pull the main rod 100 to serve as the force application point in the lever. The main rod 100 is rotated around the abutment part 120 by the operating part 110 to drive the pull rod 200 to move, thereby realizing the force-saving transmission of the lever. At this time, the force on the pull rod 200 is increased.

[0039] In order to improve the labor-saving effect, the hinge portion 130 is close to the abutment portion 120 in this embodiment. It can be understood that the length between the hinge portion 130 and the abutment portion 120 is minimized as much as possible to increase the force on the pull rod 200.

[0040] like Figure 1 As shown, the main rod 100 of this embodiment includes a first end rod segment 140, an intermediate rod segment 150, and a second end rod segment 160 connected in sequence. The first end rod segment 140 and the second end rod segment 160 are respectively bent relative to the intermediate rod segment 150. The bending directions of the first end rod segment 140 and the second end rod segment 160 are in the same direction. The pull rod 200 is located on the side of the main rod 100 away from the bent first end rod segment 140 and the second end rod segment 160. The operating part 110 and the abutment part 120 are respectively disposed at the ends of the first end rod segment 140 and the second end rod segment 160, and the abutment part 120 is disposed between the second end rod segment 160 and the intermediate rod segment 150. This can further improve the effect on the pull rod 200, expand the swing space of the pull rod 200, and facilitate the operation of the operating part 110, providing better control space. This utility model achieves more efficient force transmission by optimizing the lever design, further reducing the force required for operation and shortening the operation time.

[0041] In this embodiment, the pull rod 200 is a telescopic rod structure with adjustable length. The two ends of the pull rod 200 are respectively provided with a hook part 210 and a connecting part 220. The connecting part 220 is used to hinge with the hinge part 130 so that the pull rod 200 can rotate relative to the main rod 100, while the hook part 210 is used to hook with the spring joint.

[0042] In use, first adjust the extension length of the pull rod 200 according to the specifications and length requirements of the spring to be stretched. Then, abut the abutment part 120 on the main rod 100 against the external fixed surface, hook the hook part 210 on the pull rod 200 onto the spring joint, and press the operating part 110 on the main rod 100 down in the stretching direction of the spring. The main rod 100 pulls the pull rod 200 in the stretching direction of the spring, and the spring is stretched by lever principle so that the spring head can be inserted between the spring clips.

[0043] This utility model places the hinge part 130 near the abutment part 120, optimizes the lever design, achieves more efficient force transmission, further reduces the force required for operation, and shortens the operation time. By introducing an adjustable telescopic rod structure, the pull rod 200 can be precisely adjusted according to the spring specifications and stretching requirements, thereby ensuring the accuracy and stability of stretching. It can adapt to springs of various specifications and types, improving the versatility and flexibility of the tool.

[0044] To prevent the tool from slipping or crushing the product, the contact part 120 in this embodiment is provided with a foot pad 121. The foot pad 121 is made of soft material and is a plastic part. The foot pad 121 abuts against the fixed surface of the product to protect the product. The foot pad 121 can also increase the friction of the contact and prevent the contact part 120 from sliding relative to the fixed surface.

[0045] Furthermore, the abutment portion 120 is also provided with an installation handle 122, which is fixed to the end of the main rod 100 and is perpendicular to the main rod 100. The axial direction of the installation handle 122 is parallel to the rotation axis of the pull rod 200. The foot pad 121 is rotatably mounted on the installation handle 122, so that the foot pad 121 is parallel to the rotation axis of the pull rod 200. In use, the main rod 100 abuts against the fixed surface of the product through the foot pad 121, and the main rod 100 can rotate relative to the foot pad 121. It can be understood that the foot pad 121 acts as a fixed force point so that the main rod 100 can rotate relative to the fixed surface of the product.

[0046] like Figure 1 and 2 As shown, in order to improve the stability of the force, two foot pads 121 are provided in this embodiment. The two foot pads 121 are respectively installed at both ends of the mounting handle 122, that is, the two foot pads 121 are respectively located on both sides of the main rod 100.

[0047] The design of using two foot pads 121 in this embodiment ensures that the spring can be stretched normally even when the angle formed between the force application plane and the spring stretching direction is between 60 and 120 degrees, without the tool slipping or the product being crushed.

[0048] In cases where storage is required, to prevent the pull rod 200 from swinging freely, the pull rod 200 in this embodiment can be locked by rotation, and this embodiment does not require the operation of an additional locking mechanism, such as... Figure 1 As shown, the connecting portion 220 of this embodiment is provided with an eccentric protrusion 221 that is eccentrically disposed to the rotation axis of the pull rod 200. The eccentric protrusion 221 is configured such that when the pull rod 200 rotates to overlap with the outer periphery of the main rod 100, the outer surface of the eccentric protrusion 221 presses against the outer periphery of the main rod 100 to lock the rotation of the pull rod 200. It can be understood that when storing the tool, such as Figure 4 As shown, when the pull rod 200 is rotated to the angle folded into the main rod 100, that is, when the pull rod 200 is in the retracted state, the rotation of the pull rod 200 is locked by the eccentric protrusion 221 pressing against the outer peripheral wall of the main rod 100. Figure 3 As shown, in other rotation ranges, i.e. when the pull rod 200 is in the working state, the eccentric protrusion 221 does not interfere with the rotation of the pull rod 200. The lock can be achieved by rotating the pull rod 200, which is simple to operate.

[0049] In this embodiment, the outer peripheral wall of the eccentric protrusion 221 is an arc surface. This allows for a transition buffer between the eccentric protrusion 221 and the main rod 100 when the lever 200 is rotated to lock and release the rod. This makes the application of force smoother while maintaining the locking effect.

[0050] The hinge portion 130 in this embodiment includes a hinge frame 131 and a hinge shaft 132. The hinge frame 131 is fixed to the outer periphery of the main rod 100. The connecting portion 220 is also provided with a hinge hole 222. The eccentric protrusion 221 is eccentrically arranged with the hinge hole 222. The hinge shaft 132 is connected between the hinge frame 131 and the hinge hole 222.

[0051] like Figure 2 As shown, the connecting part 220 in this embodiment is a cam structure. In some other embodiments, the connecting part 220 may be other structures.

[0052] like Figure 4 As shown, when the pull rod 200 of this embodiment is rotated to the storage state, the pull rod 200 is folded and flipped to one side of the operation part 110 and is arranged parallel to the middle rod section 150 on the pull rod 200.

[0053] like Figure 2The hinge shaft 132 in this embodiment includes a bolt 1321 and a nut 1322. The hinge frame 131 includes two clamping pieces 1311 arranged at relative intervals along the circumference of the main rod 100. The connecting part 220 is located between the two clamping pieces 1311. The bolt 1321 passes through the two clamping pieces 1311 and the hinge hole 222 and is threadedly connected to the nut 1322. This allows the nut 1322 to be rotated to adjust the rotational damping force of the pull rod 200.

[0054] like Figure 1 and Figure 2 As shown, the pull rod 200 in this embodiment includes an adjusting rod 230 and a rotating rod 240 that are slidably sleeved together. One end of the rotating rod 240 is hinged to the hinge frame 131, and the other end of the rotating rod 240 is tubular and sleeved with the adjusting rod 230. The outer peripheral wall of the rotating rod 240 is provided with a plurality of pin holes 241 spaced apart along the axial direction. The outer peripheral wall of the adjusting rod 230 is provided with a press-type pin head 231, which is engaged with the pin holes 241. According to different length requirements, the press-type pin head 231 is engaged into different pin holes 241.

[0055] like Figure 2 As shown, this embodiment has five pin holes 241 to form five positions, each corresponding to a different extension length, thereby achieving precise control of the extension length. This design can meet the extension requirements of different springs, improve the accuracy and stability of operation, and significantly improve the precision control compared with the prior art.

[0056] In some other embodiments, a plurality of pin holes 241 may be provided on the adjusting rod 230, while a press-type pin head 231 may be provided on the rotating rod 240.

[0057] In some other implementations, the adjusting rod 230 and the rotating rod 240 can be locked together by screws.

[0058] In this embodiment, the hook part 210 is a curved hook structure. In other embodiments, the hook part 210 may be other structures.

[0059] The operating unit 110 includes an operating handle 111 connected to the main rod 100. The operating handle 111 is vertically connected to the main rod 100 to form a T-shaped structure for easy hand operation.

[0060] like Figure 5 and Figure 6As shown, the working principle of the spring tensioning tool in this embodiment is as follows: to stretch and install the springs on the spring bed, during the operation, firstly, according to the specifications and length requirements of the spring to be stretched, select the appropriate length stop, then place the foot pad 121 on the plane perpendicular to the spring stretching direction, that is, the side of the bed frame, and hook the hook part 210 on the pull rod 200 onto the spring joint. At this time, the main rod 100 should be perpendicular to the spring direction. Press down the operating handle 111 in the spring stretching direction, and use the lever principle to stretch the spring so that the spring head can be inserted between the spring clips.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An adjustable, force-saving tension spring tool, characterized in that, include: The main rod is provided with an operating part, an abutment part and a hinge part. The operating part and the abutment part are respectively located at both ends of the main rod, and the hinge part is located on the outer periphery of the main rod and close to the abutment part. The pull rod is a telescopic rod structure with adjustable length. The two ends of the pull rod are respectively provided with a hook part and a connecting part. The connecting part is hinged to the hinge part so that the pull rod can rotate relative to the main rod.

2. The adjustable force-saving tension spring tool according to claim 1, characterized in that: The contact portion is provided with at least one foot pad, which is a soft component.

3. The adjustable force-saving tension spring tool according to claim 2, characterized in that: The abutment part is also provided with a mounting handle, and at least one of the foot pads is rotatably mounted on the mounting handle, with the foot pads arranged parallel to the rotation axis of the pull rod.

4. The adjustable force-saving tension spring tool according to claim 3, characterized in that: The middle part of the mounting handle is vertically connected to the main rod, and the foot pads are rotatably mounted on both ends of the mounting handle.

5. The adjustable force-saving tension spring tool according to claim 1, characterized in that: The connecting part is provided with an eccentric protrusion that is eccentrically arranged to the rotation axis of the pull rod. The eccentric protrusion is configured such that when the pull rod rotates to overlap the outer periphery of the main rod, the outer side of the eccentric protrusion presses against the outer periphery of the main rod to lock the rotation of the pull rod.

6. The adjustable force-saving tension spring tool according to claim 5, characterized in that: The outer peripheral wall of the eccentric protrusion is an arc surface.

7. The adjustable force-saving tension spring tool according to claim 5, characterized in that: The hinge portion includes a hinge frame and a hinge shaft. The hinge frame is fixed to the outer periphery of the main rod. The connecting portion is also provided with a hinge hole. The eccentric protrusion is eccentrically disposed with respect to the hinge hole. The hinge shaft is connected between the hinge frame and the hinge hole.

8. The adjustable force-saving tension spring tool according to claim 7, characterized in that: The hinge shaft includes a bolt and a nut. The hinge frame includes two clamps that are spaced apart from each other along the circumference of the main rod. The connecting part is located between the two clamps. The bolt passes through the two clamps and the hinge hole and is threadedly connected to the nut.

9. The adjustable force-saving tension spring tool according to claim 1, characterized in that: The operating unit includes an operating handle connected to the main rod.

10. The adjustable force-saving tension spring tool according to claim 1, characterized in that: The pull rod includes an adjusting rod and a rotating rod that are slidably sleeved together. The outer peripheral wall of the rotating rod is provided with a plurality of pin holes spaced apart along the axial direction. The outer peripheral wall of the adjusting rod is provided with a pressing pin head, which is engaged with the pin holes.

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