Energy storage spring

Abstract

An energy storage spring comprises a spring, a first telescopic rod and a second telescopic rod, the outer end of the first telescopic rod is provided with a first rod connecting piece, the first rod connecting piece is provided with a guide structure, the guide structure is provided with a first spring connecting piece and a locking node, and the first spring connecting piece moves within the adjustable size length range. A locking unit which is combined with the locking node and prevents the first spring connecting piece from moving is arranged on the first spring connecting piece, a first abutting base face abutting against the corresponding end of the spring is further arranged on the first spring connecting piece, a second rod connecting piece is arranged at the outer end of the second telescopic rod, and a second spring connecting piece is arranged on the second rod connecting piece. The second spring connecting piece is provided with a second abutting base face abutting against the corresponding end of the spring. The energy storage spring has the beneficial effects that the purpose of stopping movement is achieved by taking a locking measure on the adjustable first spring connecting piece, so that the spring can be kept at the use length after being adjusted, and the energy storage spring can be kept at the set energy storage strength.

Description

Technical Field

[0001] The utility model relates to the technical field of springs, in particular to an energy storage spring. Background Art

[0002] A spring is a very commonly used part, mainly referring to a mechanical part that uses elasticity to work. A spring is generally made of spring steel. The spring will deform under the action of external force and can return to its original shape after the external force is removed. There are many types of springs, and according to their shape, there are mainly coil springs, scroll springs, leaf springs, special-shaped springs, etc.

[0003] Publication number CN211501428U discloses a compression spring with convenient adjustment of usage length, comprising a main spring, a baffle, a mounting piece, a telescopic structure and a mounting structure, the top and bottom ends of the main spring are fixedly connected to the baffle, and the bottom end of the baffle is movably connected to a rotating wheel, the bottom end of the rotating wheel is movably connected to a threaded rod, the bottom end of the rotating wheel is movably connected to the mounting piece, the top end of the baffle is movably connected to the mounting structure, a telescopic structure is arranged on the inner side of the main spring, the top end of the baffle is fixedly connected to a first outer shell, and the top end of the first outer shell is movably connected to a second outer shell. The adjustment structure provided by this compression spring achieves the purpose of adjusting the length of the compression spring, achieves the purpose of protecting the compression spring, and achieves the purpose of facilitating the installation of the compression spring, but has a defect. The rotating wheel and the threaded rod for adjusting the length of the compression spring only rely on the self-locking effect brought about by the threaded cooperation to achieve the purpose that the rotating wheel cannot rotate by itself without human intervention. The locking effect brought about by this method is limited. That is, the thread tooth surface is difficult to withstand the stress intensity brought about by the continuous operation of the compression spring during use (that is, being compressed and reset after being compressed) for a long time. The thread tooth surface is easily damaged, and after being damaged, the position of the rotating wheel will be offset. There will also be interference when the rotating wheel rotates, resulting in the inability to rotate. Relying solely on this method will increase the maintenance times of this adjustment structure. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provides an energy storage spring to solve the above-mentioned problems.

[0005] The utility model adopts a technical solution to solve its technical problems: the energy storage spring comprises a spring, a first telescopic rod, and a second telescopic rod; the first telescopic rod and the second telescopic rod are telescopically movable to cooperate with each other to adapt to the deformation of the spring; a first rod connecting piece is arranged at the outer end of the first telescopic rod; the first rod connecting piece has a guide structure defining an adjustable length; a first spring connecting piece moving within the adjustable length range and a locking node are arranged on the guide structure; a locking unit combined with the locking node and preventing the first spring connecting piece from moving is arranged on the first spring connecting piece; the first spring connecting piece also has a first abutting base surface abutting against the corresponding end of the spring; a second rod connecting piece is arranged at the outer end of the second telescopic rod; a second spring connecting piece is arranged on the second rod connecting piece; the second spring connecting piece has a second abutting base surface abutting against the corresponding end of the spring.

[0006] To be further improved, the first rod connecting member extends along its axial direction and has a columnar configuration, the first spring connecting member is provided with an inner connecting portion for the first rod connecting member to pass through and cover part of the guide structure, the inner connecting portion has a matching structure that matches the guide structure, the guide structure is linearly extended from the outer peripheral surface of the first rod connecting member, and the matching structure is linearly extended from the inner peripheral surface of the inner connecting portion along a direction deviating from the axial direction and the radial direction, and the guide structure and the matching structure match along the extension direction.

[0007] Further improvement, the matching structure and the guide structure are movably matched, and the guide structure radially protrudes along the surface of the first rod connecting member, and the matching structure is radially recessed along the surface of the inner connecting part.

[0008] For further improvement, the locking nodes are evenly distributed along the length direction of the guide structure, which includes an enclosing wall and an insertion space limited within the enclosing wall and allowing the locking unit to be placed therein, and when the locking unit is placed in the insertion space, its outer peripheral surface contacts the enclosing wall.

[0009] Further improvement, the locking unit includes a hand-held part, and an extension body extending from the hand-held part and placed in the insertion space, a locked structure consistent with the guide structure is arranged on the outer circumference of the extension body, and a locking structure consistent with the matching structure is arranged on the inner circumference of the enclosing wall.

[0010] For further improvement, the first telescopic rod is provided with a first pre-positioning hole perpendicular to its extension direction, the second telescopic rod is provided with a second pre-positioning hole perpendicular to its extension direction, and the first pre-positioning hole and the second pre-positioning hole are jointly inserted with a positioning plug-in.

[0011] For further improvement, both the first rod connecting member and the second rod connecting member are provided with an axial connection space for the needle bearing to be rotatably connected therein.

[0012] The beneficial effects of the utility model are:

[0013] The utility model takes locking measures on the adjustable first spring connecting member, that is, the first spring connecting member cannot rotate after being locked, so as to achieve the purpose of preventing the first spring connecting member from moving. At the same time, the first spring connecting member can resist the situation that the energy storage spring continues to work (that is, is compressed and reset after being compressed) during use, so that the spring can be maintained at the adjusted use length, so that the energy storage spring can be maintained at the set energy storage strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a partial full-section structural schematic diagram of the utility model;

[0016] Figure 3 For this utility model Figure 2 A partial enlarged schematic diagram of part A;

[0017] Figure 4 This is a schematic diagram of the explosion structure of the utility model, in which the spring is hidden. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Referring to the accompanying drawings: This energy storage spring includes a spring 1, a first telescopic rod 2, and a second telescopic rod 3. The first telescopic rod 2 and the second telescopic rod 3 are telescopically moved to cooperate with each other to adapt to the deformation of the spring 1. The outer end of the first telescopic rod 2 is provided with a first rod connecting member 4, and the first rod connecting member 4 has a guide structure 41 that defines an adjustable length. The guide structure 41 is provided with a first spring connecting member 5 that moves within the adjustable length range, and a locking node 6. The first spring connecting member 5 is provided with a locking unit 7 that combines with the locking node 6 and prevents the first spring connecting member 5 from moving, and also has a first abutting base surface 51 that abuts against the corresponding end of the spring 1. The outer end of the second telescopic rod 3 is provided with a second rod connecting member 8, and the second rod connecting member 8 is provided with a second spring connecting member 9. The second spring connecting member 9 has a second abutting base surface 91 that abuts against the corresponding end of the spring 1. The principle of the utility model is that there is a preset spacing between the first spring connector 5 and the second spring connector 9 that is adapted to the size of the spring 1, and the spacing can change with the change of the length of the spring 1, and the change of the length of the spring 1 is achieved by the movement of the first spring connector 5 on the guide structure 41, and in order to prevent the movement of the first spring connector 5 after the use length of the spring 1 is determined, a locking unit 7 is provided on the first spring connector 5 and a locking node 6 is provided on the guide structure 41, so that the movement of the first spring connector 5 is prevented by the combination of the locking unit 7 and the locking node 6. Compared with the self-locking brought about by the threaded cooperation of the rotating wheel and the threaded rod in the comparative document, this method is more stable, that is, the locking unit 7 is on the moving track of the first spring connector 5, so as to achieve the purpose of preventing movement, and there will be no positional displacement due to the continuous operation of the energy storage spring during use (that is, being compressed and reset after being compressed), so that the spring 1 can be maintained at the adjusted use length, so that the energy storage spring can be maintained at the set energy storage strength, and the locking unit 7 can withstand most of the stress strength.

[0020] The first rod connector 4 extends along its axial direction and has a columnar configuration. The first spring connector 5 is provided with an inner connecting portion 52 for the first rod connector 4 to pass through and cover part of the guide structure 41. The inner connecting portion 52 has a matching structure 52-a that matches the guide structure 41. The guide structure 41 is linearly extended from the outer peripheral surface of the first rod connector 4 and the matching structure 52-a is linearly extended from the inner peripheral surface of the inner connecting portion 52 along a direction deviating from the axial direction and the radial direction. The guide structure 41 and the matching structure 52-a match along the extension direction. By setting the matching structure 52-a and the guide structure 41 as linear structures deviating from the axial direction and the circumferential direction, when the first spring connector 5 moves linearly through the guide structure 41, the matching structure 52-a slides synchronously along the guide structure 41 to drive the first spring connector 5 to rotate around the axis of the first rod connector 4, thereby causing the first spring connector 5 to perform synchronous linear motion and rotational motion, ensuring the convenience of adjustment of the first spring connector 5. The friction resistance between the matching structure 52-a and the guide structure 41 is small, so the user is more labor-saving when using it.

[0021] The matching structure 52-a is movably matched with the guide structure 41, and the guide structure 41 radially protrudes along the surface of the first rod connecting member 4, and the matching structure 52-a is radially recessed along the surface of the inner connecting portion 52. Through this matching method, the first spring connecting member 5 and the first rod connecting member 4 can be made more compact, and the matching clearance can be reduced to improve the stability of the matching.

[0022] The locking nodes 6 are equidistantly distributed along the length direction of the guide structure 41, and include an enclosing wall 61, and an insertion space 62 defined within the enclosing wall 61 and allowing the locking unit 7 to be placed therein. When the locking unit 7 is placed in the insertion space 62, its outer peripheral surface contacts the enclosing wall 61. The insertion space 62 is for the locking unit 7 to be placed therein, and after being placed, the locking unit 7 can be located on the moving trajectory of the first spring connector 5, and combined with the contact with the enclosing wall 61, the purpose of preventing the first spring connector 5 from moving is achieved.

[0023] The locking unit 7 includes a hand-held portion 71, and an extension body 72 extending from the hand-held portion 71 and placed in the placement space 62. A locked structure 72-a consistent with the structure of the guide structure 41 is arranged on the outer peripheral surface of the extension body 72, and a locking structure 61-a consistent with the structure of the matching structure 52-a is arranged on the inner peripheral surface of the enclosing wall 61. The hand-held portion 71 is used to facilitate the user to operate the locking unit 7, that is, to enter or disengage from the locking node 6, and the extension body 72 is used to enter the placement space 62 to prevent the first spring connector 5 from moving. The combination of the locked structure 72-a and the locking structure 61-a enables the locking unit 7 to stably exist in the locking node 6, that is, the locking unit 7 will not disengage from the locking node 6 without human intervention.

[0024] The first telescopic rod 2 is provided with a first pre-positioning hole 21 perpendicular to its extension direction, and the second telescopic rod 3 is provided with a second pre-positioning hole 31 perpendicular to its extension direction. The first pre-positioning hole 21 and the second pre-positioning hole 31 are jointly inserted with a positioning plug 10, that is, by preventing the first telescopic rod 2 and the second telescopic rod 3 from telescopically moving with each other, the length adjustment of the spring 1 by the first spring connector 5 is avoided. The structure is simple and the operation is convenient, that is, the positioning plug 10 can be inserted into the first pre-positioning hole 21 and the second pre-positioning hole 31 at the same time.

[0025] The first rod connector 4 and the second rod connector 8 are both provided with an axial connection space 20 for the needle bearing to rotatably connect therein. The needle bearing can convert the sliding friction generated by the spring 1 during operation into rolling friction, which can make the overall rotation of the energy storage spring more flexible and increase the structural life.

[0026] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. An energy storage spring, comprising a spring (1), a first telescopic rod (2), and a second telescopic rod (3), wherein the first telescopic rod (2) and the second telescopic rod (3) are telescopically movable to adapt to the deformation of the spring (1), characterized in that: The outer end of the first telescopic rod (2) is provided with a first rod connecting member (4), the first rod connecting member (4) having a guide structure (41) defining an adjustable length, the guide structure (41) being provided with a first spring connecting member (5) movable within the adjustable length range, and a locking node (6), the first spring connecting member (5) being provided with a locking unit (7) coupled with the locking node (6) and preventing the first spring connecting member (5) from moving, and also having a first abutting base surface (51) abutting against a corresponding end of the spring (1), the outer end of the second telescopic rod (3) being provided with a second rod connecting member (8), the second rod connecting member (8) being provided with a second spring connecting member (9), the second spring connecting member (9) having a second abutting base surface (91) abutting against a corresponding end of the spring (1).

2. The energy storage spring according to claim 1, characterized in that: The first rod connecting member (4) extends along its axial direction and has a columnar configuration. The first spring connecting member (5) is provided with an inner connecting portion (52) for the first rod connecting member (4) to pass through and cover a portion of the guide structure (41). The inner connecting portion (52) has a matching structure (52-a) that matches the guide structure (41). The guide structure (41) is linearly extended from the outer peripheral surface of the first rod connecting member (4) and the matching structure (52-a) is linearly extended from the inner peripheral surface of the inner connecting portion (52) along a direction deviating from the axial direction and the radial direction. The guide structure (41) and the matching structure (52-a) match along the extension direction.

3. The energy storage spring according to claim 2, characterized in that: The matching structure (52-a) is movably matched with the guide structure (41), and the guide structure (41) radially protrudes along the surface of the first rod connecting member (4), and the matching structure (52-a) is radially recessed along the surface of the inner connecting portion (52).

4. The energy storage spring according to claim 3, characterized in that: The locking nodes (6) are equidistantly distributed along the length direction of the guide structure (41), and include an enclosing wall (61), and an insertion space (62) defined within the enclosing wall (61) and allowing the locking unit (7) to be placed therein; when the locking unit (7) is placed in the insertion space (62), its outer peripheral surface is in contact with the enclosing wall (61).

5. The energy storage spring according to claim 4, characterized in that: The locking unit (7) comprises a hand-held portion (71), and an extension body (72) extending from the hand-held portion (71) and placed in the insertion space (62); a locked structure (72-a) having a structure consistent with the guide structure (41) is arranged on the outer peripheral surface of the extension body (72); and a locking structure (61-a) having a structure consistent with the matching structure (52-a) is arranged on the inner peripheral surface of the enclosing wall (61).

6. The energy storage spring according to claim 1, characterized in that: The first telescopic rod (2) is provided with a first pre-positioning hole (21) perpendicular to its extension direction, and the second telescopic rod (3) is provided with a second pre-positioning hole (31) perpendicular to its extension direction. The first pre-positioning hole (21) and the second pre-positioning hole (31) are both inserted with a positioning plug-in (10).

7. The energy storage spring according to claim 1, characterized in that: The first rod connecting member (4) and the second rod connecting member (8) are both provided with a shaft connection space (20) for the needle bearing to be rotatably connected therein.

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