Coil spring clamping jig and coil spring torsion detection device using the same

Abstract

The utility model belongs to the technical field of testing device, concretely relates to a kind of volute spring clamping fixture and the volute spring torsion detection device using it, comprising: support column, it includes columnar body and the annular boss of integrally being arranged on the lateral wall of columnar body;Columnar body is also equipped with the limiting piece for fixing the end of volute spring;Limiting cover, it includes the shell body suitable for being carried on annular boss, the limiting cavity for accommodating volute spring in shell, and at least one the clamping groove suitable for the other end of volute spring is arranged on the circumferential lateral wall of shell body and is clamped;The circumferential lateral wall of shell body is also equipped with the push rod that protrudes towards the direction of back to limiting cavity.The utility model can optimize the limiting effect for volute spring torsion test process, to improve the accuracy of torsion test result thereby.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing devices, specifically relating to a coil spring clamping fixture and a coil spring torque testing device using the same. Background Technology

[0002] Springs can store and release energy. Different usage environments require different spring specifications, so it is necessary to select and use springs based on their torque. Therefore, torque testing is essential in the spring production process to determine the torque parameters of different springs.

[0003] For example, CN120194922A discloses a torsion spring torque testing fixture, which detects the torsion spring torque through the cooperation of a fixed component and a movable component. Another example is CN223243938U, which discloses a torsion spring testing device that detects the torsion spring torque through the cooperation of a base component and a rotating component. Numerous similar testing devices exist, all requiring spring clamping and limiting during testing to ensure that the spring deforms only along the elastic tightening direction, thereby improving the accuracy of the test results. In CN120194922A, four support blocks are spaced apart along the circumference of the spring to form a limiting cavity. This structure is complex to use, requiring proper coordination of the four support blocks. Furthermore, its limiting function is only radial, lacking axial limiting. In this case, for torsion springs or coil springs whose tightening direction is the rotational direction, axial deformation may occur during rotation, affecting the accuracy of the torque test results. For example, in the announcement number CN223243938U, the torsion spring is limited by a torsion spring sleeve. However, it also has the problem of only limiting the torsion spring radially and lacking axial limitation.

[0004] In summary, given the shortcomings of the existing fixtures used for limiting and clamping springs in the torque testing process of springs that are deformed along the rotation direction, further optimization and improvement of their structure are needed to improve the accuracy of torque testing results. Utility Model Content

[0005] The primary objective of this invention is to provide a coil spring clamping fixture to solve the technical problem of optimizing the limiting process in the torque detection process of torsion springs.

[0006] The second objective of this invention is to provide a coil spring torque detection device to solve the technical problem of improving the accuracy of torque detection results.

[0007] The coil spring clamping fixture of this utility model is implemented as follows: A spring clamping fixture, comprising: The support column includes a columnar body and an annular boss integrally provided on the side wall of the columnar body; the columnar body is also provided with a limiting member for fixing one end of the coil spring. The limiting cover includes a cover body adapted to be mounted on an annular boss, a limiting cavity provided in the cover for accommodating a coil spring, and at least one slot provided on the circumferential side wall of the cover body adapted to engage the other end of the coil spring; the circumferential outer side wall of the cover body is also provided with a push rod protruding in the direction opposite to the limiting cavity.

[0008] In an optional embodiment of this utility model, the limiting member is a locking block that protrudes relative to the outer side wall of the columnar body, and one end of the coil spring is provided with a locking hole for engaging with the locking block.

[0009] In an optional embodiment of this utility model, the cover body is designed with an end plate on one side along the axial direction of the columnar body, and the end plate is provided with an opening suitable for the columnar body to pass through.

[0010] In an optional embodiment of this utility model, the side end of the cover body along the axial direction of the columnar body and away from the end plate is an open end suitable for the coil spring to enter and exit the limiting cavity; and Each of the slots extends along the axial direction of the columnar body, and each of the slots extends from the opening along the axial direction of the columnar body to the open end.

[0011] In an optional embodiment of this utility model, the annular boss is further provided with an annular limiting platform on the side end face of the cover body, which is suitable for embedding into the open end of the cover body.

[0012] In an optional embodiment of this utility model, the limiting platform and the end plate of the cover body are adapted to form an axial limit for the coil spring.

[0013] In an optional embodiment of this utility model, the outer diameter of the limiting platform is smaller than the outer diameter of the annular boss; and The outer diameter of the annular boss is not less than the outer diameter of the casing body.

[0014] In an optional embodiment of this invention, the groove depth of each of the slots along the axial direction of the columnar body is not less than the axial dimension of the coil spring.

[0015] The coil spring torque detection device of this utility model is implemented as follows: A coil spring torque testing device includes: a testing machine, a coil spring clamping fixture adapted to be fixed in the testing machine, and a torque testing rod disposed on the testing machine adapted to abut against the push rod.

[0016] In an optional embodiment of this invention, the torque detection rod has at least a detection head parallel to the axial direction of the cylindrical body, and the detection head is adapted to abut against the push rod.

[0017] The beneficial effects of this utility model are that the coil spring clamping fixture and the coil spring torque detection device using it, through the cooperation of the support column and the limiting cover, allow the coil spring to be reliably limited in the limiting cover. Under such a structure, the coil spring will not easily deform in the axial direction during the torque detection process, except for the tightening movement along the rotation direction. This reduces the interference of axial factors on the torque detection results and improves the accuracy of the torque detection results.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the coil spring clamping fixture provided in the embodiments of this disclosure; Figure 2 A cross-sectional view of the coil spring clamping fixture provided in an embodiment of this disclosure; Figure 3 A schematic diagram of the cooperation structure between the coil spring and the support column of the coil spring clamping fixture provided in the embodiments of this disclosure; Figure 4 A schematic diagram of the mating structure of the coil spring clamping fixture provided in the embodiments of this disclosure; Figure 5 A schematic diagram illustrating the usage of the coil spring clamping fixture provided in this embodiment of the present disclosure on a testing machine.

[0022] In the figure: columnar body 1, annular boss 11, limiting component 12, limiting platform 13, coil spring 2, end 21, locking hole 22, cover body 3, limiting cavity 31, locking groove 32, push rod 33, testing machine 4, torque detection rod 5, detection head 51. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Example 1: Please refer to Figures 1 to 5 As shown, this embodiment provides a coil spring clamping fixture, including a support column and a limiting cover for use. Both the support column and the limiting cover can be cylindrical structures to better suit the usage requirements of the coil spring 2.

[0025] Specifically, the first component is a support column, which includes a columnar body 1 and an annular boss 11 integrally formed on the side wall of the columnar body 1. The columnar body 1 also has a limiting member 12 for fixing one end 21 of the coil spring 2 (depending on the specific winding of the coil spring 2, this end 21 can be selected as the end 21 located inside the coil spring 2). The annular boss 11 here is used to support the limiting cover; therefore, the annular boss 11 is preferably a ring-shaped boss. Regarding the limiting member 12, referring to the accompanying drawings, one optional configuration is provided: the limiting member 12 is a latching block that protrudes relative to the outer side wall of the columnar body 1, and one end 21 of the coil spring 2 has a latching hole 22 for engaging with the latching block.

[0026] Secondly, there is a limiting cover, which includes a cover body 3 suitable for mounting on the annular boss 11, a limiting cavity 31 provided in the cover for accommodating the coil spring 2, and at least one slot 32 provided on the circumferential side wall of the cover body 3 for engaging the other end 21 of the coil spring 2 (depending on the specific winding of the coil spring 2, the end 21 here can be the end 21 located on the outside of the coil spring 2); the circumferential outer side wall of the cover body 3 is also provided with a push rod 33 protruding in the direction opposite to the limiting cavity 31. The limiting cavity 31 is a cylindrical cavity adapted to the coil spring 2.

[0027] Based on the above structure, more specifically, in order to enable the housing body 3 to simultaneously meet the requirements of the coil spring 2 and the support column, an end plate is designed on one side of the housing body 3 along the axial direction of the columnar body 1, and an opening is provided on the end plate to allow the columnar body 1 to pass through. The side of the housing body 3 along the axial direction of the columnar body 1 and away from the end plate is an open end suitable for the coil spring 2 to enter and exit the limiting cavity 31. This open end is suitable for mounting on the annular boss 11. Therefore, in the actual testing process of the coil spring 2, both sides of the coil spring 2 are limited in the limiting cavity 31 of the housing body 3.

[0028] Based on the above, and referring to the accompanying drawings, in an optional embodiment, to prevent the protective cover mounted on the annular limiting platform 13 from unexpectedly shaking, the annular boss 11 in this embodiment is further provided with an annular limiting platform 13 on its side end face facing the cover body 3, which is suitable for embedding into the open end of the cover body 3. It should be noted that the outer diameter of the limiting platform 13 is smaller than the outer diameter of the annular boss 11; and the outer diameter of the annular boss 11 is not smaller than the outer diameter of the cover body 3. The limiting platform 13 and the end plate of the cover body 3 cooperate to form an axial limiting for the coil spring 2.

[0029] Furthermore, it is necessary to explain that, regarding the slots 32 in this embodiment, each slot 32 extends along the axial direction of the columnar body 1, and the opening of each slot 32 extends to the open end along the axial direction of the columnar body 1. Moreover, the groove depth of each slot 32 along the axial direction of the columnar body 1 is not less than the axial dimension of the coil spring 2. Regarding the groove width of the slot 32, it should not be too large. Ideally, the slot 32 can have a transition fit with the end 21 of the coil spring 2, that is, the groove width of the slot 32 is preferably adapted to the thickness of the end 21 of the coil spring 2. This ensures that the mating structure formed by the end 21 of the coil spring 2 and the slot 32 maintains a reliable and stable state during the torque test of the coil spring 2.

[0030] In summary, for the coil spring clamping fixture of this embodiment, the cooperation between the support column and the limiting cover allows the coil spring 2 to be reliably confined within the limiting cover. Under this structure, the coil spring 2 will not easily undergo axial deformation during torque detection, except for the tightening motion along the rotation direction. This reduces the interference of axial factors on the torque detection results and improves the accuracy of the torque detection results.

[0031] Example 2: Based on the spring clamping fixture of Example 1, this example provides a spring 2 torque detection device, including: a testing machine 4, a spring clamping fixture suitable for fixing in the testing machine 4, and a torque detection rod 5 disposed on the testing machine 4 suitable for abutting against the push rod 33. The torque detection rod 5 has at least a detection head 51 parallel to the axial direction of the cylindrical body 1, and the detection head 51 is suitable for abutting against the push rod 33.

[0032] Based on the above, it should be noted that the testing machine 4 and the torque testing rod in this embodiment can be selected from any mature means in the prior art. This embodiment does not make an absolute limitation on this. Generally speaking, the spring clamping fixture fixed in the testing machine 4 can make the support column rotate under the action of the testing machine 4, while the torque testing rod 5 will not rotate.

[0033] In summary, the specific implementation principle of the coil spring 2 torque detection device in this embodiment is as follows: In the first optional implementation, before testing the torque of the coil spring 2, the user first manually winds the coil spring 2 inside the limiting cover and extends the outer end 21 of the coil spring 2 out of the slot 32 of the limiting cover; then, the limiting cover with the coil spring 2 is fitted onto the columnar body 1 of the support column, and the inner end 21 of the coil spring 2 is engaged with the limiting member 12. At this time, the limiting cover abuts against the annular boss 11, and the inner wall of the limiting cover abuts against the outer peripheral edge of the limiting platform 13, so that the coil spring 2 is fixed between the inner wall of the limiting cavity 31 and the support column.

[0034] In the second optional implementation, before testing the torque of the coil spring 2, the user first manually mounts the coil spring 2 onto the support column and engages the inner end 21 of the coil spring 2 with the limiting member 12 on the support column. Then, the limiting cover is mounted onto the columnar body 1 of the support column in the vertical direction. During this process, by rotating the limiting cover, one of the slots 32 on the limiting cover can be aligned with the outer end 21 of the coil spring 2. As the limiting cover continues to move downward, the outer end 21 of the coil spring 2 gradually enters the slot 32 until the limiting cover is mounted on the annular boss 11, at which point the limiting cover is assembled in place relative to the support column.

[0035] Based on the above, the assembled support column, limiting cover, and coil spring 2 are loaded into the testing machine 4 as a whole assembly. The push rod 33 on the outer wall of the limiting cover abuts against the detection head 51 of the torque detection rod 5 of the testing machine 4. Subsequently, the testing machine 4 is turned on, causing the support column to rotate under the action of the testing machine 4. Since the inner end 21 of the coil spring 2 is engaged with the limiting member 12 on the support column, the inner end 21 of the coil spring 2 can rotate synchronously with the rotation of the support column. In the above process, for the limiting cover, due to the contact between the push rod 33 and the torque detection rod 5, the limiting cover will not rotate synchronously with the support column. Therefore, the outer end 21 of the coil spring 2, which is engaged in the slot 32, will not rotate synchronously with the rotation of the support column. During this process, the coil spring 2 will gradually tighten, exerting a force on the limiting cover engaged with its outer end 21, and thus transmitting this force to the torque detection rod 5 to obtain the torque of the coil spring 2. During this detection process, since the coil spring 2 is confined inside the limiting cover, when its inner end 21 rotates with the support column, the main deformation of the coil spring 2 is in the direction of rotation around the axis of the support column. The axial deformation of the coil spring 2 can be controlled within a small range, thus improving the accuracy of the torque detection results for the coil spring 2.

[0036] The shortcomings of the above solutions are the result of the utility model inventor's practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure below should be considered as contributions made by the utility model inventor to this disclosure.

[0037] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0038] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0039] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0040] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0041] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

Claims

1. A spring clamping fixture, characterized in that, At least including: A support column, comprising a columnar body and an annular boss integrally provided on the side wall of the columnar body; The columnar body is also provided with a limiting member for fixing one end of the coil spring; The limiting cover includes a cover body adapted to be mounted on an annular boss, a limiting cavity provided in the cover for accommodating a coil spring, and at least one slot provided on the circumferential side wall of the cover body adapted to engage the other end of the coil spring; the circumferential outer side wall of the cover body is also provided with a push rod protruding in the direction opposite to the limiting cavity.

2. The spring clamping fixture according to claim 1, characterized in that, The limiting member is a locking block that protrudes relative to the outer side wall of the columnar body, and one end of the coil spring is provided with a locking hole for engaging with the locking block.

3. The spring clamping fixture according to claim 1 or 2, characterized in that, The cover body has an end plate on one side along the axial direction of the columnar body, and the end plate has an opening suitable for the columnar body to pass through.

4. The spring clamping fixture according to claim 3, characterized in that, The side end of the cover body along the axial direction of the columnar body and away from the end plate is an open end suitable for the coil spring to enter and exit the limiting cavity. as well as Each of the slots extends along the axial direction of the columnar body, and each of the slots extends from the opening along the axial direction of the columnar body to the open end.

5. The spring clamping fixture according to claim 4, characterized in that, The annular boss is also provided with an annular limiting platform on the side end face of the cover body, which is suitable for embedding into the open end of the cover body.

6. The spring clamping fixture according to claim 5, characterized in that, The limiting platform and the end plate of the cover body are adapted to form an axial limit for the coil spring.

7. The spring clamping fixture according to claim 5, characterized in that, The outer diameter of the limiting platform is smaller than the outer diameter of the annular boss; and The outer diameter of the annular boss is not less than the outer diameter of the casing body.

8. The spring clamping fixture according to claim 1 or 2, characterized in that, The groove depth of each of the aforementioned slots along the axial direction of the cylindrical body is not less than the axial dimension of the coil spring.

9. A coil spring torque detection device, characterized in that, At least including: The testing machine, a spring clamping fixture as described in any one of claims 1 to 8 suitable for fixing in the testing machine, and a torque detection rod provided on the testing machine suitable for abutting against the push rod.

10. The coil spring torque detection device according to claim 9, characterized in that, The torque detection rod has at least one detection head parallel to the axial direction of the cylindrical body, and the detection head is adapted to abut against the push rod.

Images