A kind of anti-deformation pre-tightening device and performance testing device for constant force spring

Abstract

The embodiment of the present specification provides a deformation-preventing pre-tightening device and a performance testing device for a constant force spring. The deformation-preventing pre-tightening device can comprise a track, a fixed seat arranged at one end of the track, the fixed seat being provided with a mounting assembly for mounting a fixed end of the constant force spring, a sliding seat slidably arranged on the track, the sliding seat being provided with a switching mechanism for connecting a free end of the constant force spring, and a pre-tightening assembly arranged between the mounting assembly and the sliding seat to apply pressure to the outer side of the spring leaf of the constant force spring. The performance testing device can comprise a base plate, the aforementioned deformation-preventing pre-tightening device, a driving assembly for driving the free end of the constant force spring assembly to move along the track, and a counting assembly for recording the number of reciprocating movements of the free end of the constant force spring driven by the driving assembly. The performance testing device can further comprise a tension assembly for pulling the free end of the constant force spring assembly to move along the guide assembly and displaying and / or recording the tension.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of spring testing, in particular to a deformation-preventing pre-tightening device and performance testing device for constant force springs. BACKGROUND

[0002] A constant force spring is a special extension spring that is suitable for applications where the load force is large and constant. A constant force spring consists of a helical metal strip, each turn of which is tightly wound around the turn of the metal strip inside it. When the metal strip is stretched (twisted), the internal stress resists the load force, which is exactly the same as that of a common extension spring, but the spring constant is close to zero. The inner end of the constant force spring is usually tightly wound around the center shaft, and the free end of the constant force spring is connected to the load, just like a counterweight. The free end can also be fixed, and the working force is provided by the spring itself by driving the center shaft to rotate.

[0003] During use, the spring leaf of the constant force spring may be deformed outwardly, which will affect the strength of the connection position and in turn affect the force balance effect. Therefore, a technical solution is needed to effectively prevent the spring leaf from deforming outwardly, so as to improve the strength of the connection position of the constant force spring and stabilize the force balance effect. SUMMARY

[0004] The first aspect of the embodiments of the present specification provides a deformation-preventing pre-tightening device for a constant force spring, comprising: a track; a fixed seat provided at one end of the track, the fixed seat being provided with a mounting assembly, the mounting assembly being used to mount a fixed end of the constant force spring, so that the constant force spring can rotate around its own center axis; a sliding seat, the sliding seat being slidably provided on the track, the sliding seat being provided with an adapter mechanism, the adapter mechanism being used to connect a free end of the constant force spring; and a pre-tightening assembly, the pre-tightening assembly being provided between the mounting assembly and the sliding seat to apply pressure to the outside of the spring leaf of the constant force spring.

[0005] In some embodiments, the pre-tightening assembly includes a pressure roller and a pressure roller shaft, the pressure roller being rotatably sleeved on the pressure roller shaft, both ends of the pressure roller shaft being mounted on the fixed seat, and the pressure roller being used to apply pressure to the outside of the constant force spring.

[0006] In some embodiments, the pre-tightening assembly further includes first and second adjusting guide rails that are parallel to each other, a plurality of the first adjusting guide rails having an included angle with the track; both ends of the pressure roller shaft are mounted on the fixed seat through the first and second adjusting guide rails, respectively, and both ends of the pressure roller shaft can move along the first and second adjusting guide rails, respectively.

[0007] In some embodiments, the number of the first adjusting guide rails and the second adjusting guide rails is multiple, and the multiple first adjusting guide rails and the multiple second adjusting guide rails are arranged in one-to-one correspondence; the multiple first adjusting guide rails are arranged at intervals along the extension direction of the track; and the multiple second adjusting guide rails are arranged at intervals along the extension direction of the track.

[0008] In some embodiments, the pre-tightening assembly further comprises a position adjusting assembly for adjusting and limiting the positions of the two ends of the roller shaft on the first adjusting guide rail and the second adjusting guide rail, respectively.

[0009] In some embodiments, the first adjusting guide rail and the second adjusting guide rail are in the form of a strip-shaped hole.

[0010] In some embodiments, the position adjusting assembly comprises a first adjusting screw, a second adjusting screw, a first threaded hole, and a second threaded hole; the first threaded hole is arranged at one end of the first adjusting guide rail and communicates with the strip-shaped hole, and the second threaded hole is arranged at one end of the second adjusting guide rail and communicates with the strip-shaped hole; the first adjusting screw is capable of cooperating with the first threaded hole, and the front end of the first adjusting screw abuts against one end of the roller shaft; and the second adjusting screw is capable of cooperating with the second threaded hole, and the front end of the first adjusting screw abuts against the other end of the roller shaft.

[0011] In some embodiments, the position adjusting assembly comprises a first driving mechanism, a second driving mechanism, and a pressure sensor; one end of the roller shaft is connected to the fixed seat through the first driving mechanism, the other end of the roller shaft is connected to the fixed seat through the second driving mechanism, the first driving mechanism drives the one end of the roller shaft to move along the first adjusting guide rail, the second driving mechanism drives the other end of the roller shaft to move along the second adjusting guide rail, and the pressure sensor is arranged on the roller; wherein the driving mechanism adjusts the position of the roller shaft based on the pressure sensed by the pressure sensor.

[0012] The second aspect of the present specification provides a performance testing device for a constant force spring, comprising: a base plate; the anti-deformation pre-tightening device for a constant force spring of any one of the embodiments of the first aspect, which is mounted on the base plate; a driving assembly for driving the free end of the constant force spring assembly to move along the track, which is mounted on the base plate; and a counting assembly for recording the number of times of reciprocating movement of the free end of the constant force spring driven by the driving assembly.

[0013] The third aspect of the present specification provides a performance testing device for a constant force spring, comprising: a base plate; the anti-deformation pre-tightening device for a constant force spring of any one of the preceding first aspect, the anti-deformation pre-tightening device being mounted on the base plate; a tension assembly for pulling the free end of the constant force spring assembly to move along the track and display and / or record the tension; a driving assembly for driving the tension assembly to move along the track, the driving assembly being mounted on the base plate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of an anti-deformation pre-tightening device for a constant force spring in some embodiments of the present specification.

[0015] Figure 2 is a structural schematic diagram of a mounting assembly in some embodiments of the present specification.

[0016] Figure 3 is a structural schematic diagram of a position adjusting assembly in some embodiments of the present specification.

[0017] Figure 4 is a structural schematic diagram of a performance testing device for a constant force spring in some embodiments of the present specification.

[0018] Figure 5 is a structural schematic diagram of a performance testing device for a constant force spring in some embodiments of the present specification.

[0019] REFERENCE SIGNS:

[0020] 1 is a track; 2 is a fixed seat; 21 is a seat plate; 22 is a first vertical plate; 23 is a second vertical plate; 24 is a mounting assembly; 241 is a constant force spring shaft; 242 is a constant force spring gland; 243 is a bearing; 25 is a reference scale line; 3 is a constant force spring; 31 is a center axis; 32 is a fixed end; 33 is a spring leaf; 34 is a free end; 4 is a sliding seat; 41 is an adapter mechanism; 5 is a pre-tightening assembly; 51 is a pressing wheel; 52 is a pressing wheel shaft; 53 is a first adjusting guide rail; 54 is a second adjusting guide rail; 55 is a position adjusting assembly; 551 is a first adjusting screw; 552 is a first threaded hole; 553 is a second adjusting screw; 554 is a second threaded hole; 555 is a reference scale line; A is the extension direction of the track; 6 is a base plate; 7 is a driving assembly; 71 is a lead screw; 72 is a first translation connecting piece; 73 is a second translation connecting piece; 74 is a shaft coupling; 75 is a motor; 8 is a tension assembly; 9 is a counting assembly; 91 is a counter; 92 is a magnet trigger; 10 is a limit assembly; 101 is a first stroke limit switch; 102 is a limit trigger block; 103 is a second stroke limit switch. DETAILED DESCRIPTION

[0021] In order to make the technical solutions of the embodiments of the present specification clearer, the drawings needed to be used in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some examples or embodiments of the present specification, and those skilled in the art can also apply the present specification to other similar scenarios without creative labor on the basis of these drawings. It should be understood that these exemplary embodiments are only given to enable those skilled in the related art to better understand and implement the present specification, and do not limit the scope of the present specification in any way. Unless the context clearly indicates otherwise or otherwise stated, the same reference numbers in the drawings represent the same structures or operations.

[0022] As shown in the present specification and claims, unless the context clearly indicates otherwise or otherwise stated, the words "one", "a", "an", and / or "the" do not refer to the singular, but can also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment".

[0023] Figure 1 is a structural schematic diagram of a deformation-prevention pre-tightening device 100 for a constant-force spring according to some embodiments of the present specification.

[0024] The deformation-prevention pre-tightening device 100 can include a track 1, a fixed seat 2, a sliding seat 4, and a pre-tightening assembly 5.

[0025] The track 1 can be used to guide the sliding of the sliding seat 4. The track 1 can be a T-shaped guide rail, a T-shaped slot rail, etc.

[0026] The fixed seat 2 can be used to mount the constant-force spring 3. The fixed seat 2 is arranged at one end of the track 1. The fixed seat 1 is provided with a mounting assembly 24. The mounting assembly 24 is used to mount the fixed end of the constant-force spring 3, so that the constant-force spring 3 can rotate around its own center axis 31. For specific descriptions of the mounting assembly 24 and the constant-force spring 3, please refer to the description of Figure 2 later.

[0027] The sliding seat 4 is used to drive the free end of the constant-force spring 3 to reciprocate along the track 1. The sliding seat 4 can be slidably arranged on the track 1. In some embodiments, the sliding seat 4 can be provided with a transfer mechanism 41. The transfer mechanism 41 is used to connect the free end of the constant-force spring 3. The connection structure of the transfer mechanism 41 and the free end of the constant-force spring 3 can be referred to the description of Figure 2 later.

[0028] The pre-tightening assembly 5 is used to apply pressure to the outer side of the leaf spring 33 of the constant force spring 3 to prevent the leaf spring from buckling. The inner side of the leaf spring 33 is the side of the leaf spring 33 that contacts the already coiled leaf spring 33 of the previous coil during the coiling process. The outer side of the leaf spring 33 is the side of the leaf spring 33 that contacts the leaf spring 33 to be coiled during the coiling process. In the embodiments of the present disclosure, the outer side of the leaf spring 33 can be understood as the outer side of the part of the leaf spring 33 that is stretched out through the free end of the constant force spring 3. The position of the outer side of the leaf spring 33 can be referred to the part indicated by the mark 33 in FIG. 1. The pre-tightening assembly 5 can be arranged between the mounting assembly 24 and the adapter mechanism 41 of the sliding seat 4. Figure 2

[0029] In some embodiments, the fixed seat 2 can include a seat plate 21, a first vertical plate 22, and a second vertical plate 23. In some embodiments, the first vertical plate 22 and the second vertical plate 23 can be arranged on the seat plate 21 with a spacing. In some embodiments, the mounting assembly 24 is mounted between the first vertical plate 22 and the second vertical plate 23.

[0030] In some embodiments, the track 1 can be arranged on the seat plate 21.

[0031] In some embodiments, a reference scale 25 is arranged on the first vertical plate 22 or / and the second vertical plate 23. The reference scale 25 serves as a reference for determining the relative position of the pre-tightening assembly with respect to the constant force spring 3.

[0032] The foregoing embodiments can achieve effects including but not limited to: the pre-tightening assembly can be used to apply pressure to the outer side of the leaf spring of the constant force spring to prevent the leaf spring from buckling during repeated stretching and contraction.

[0033] In some embodiments, the pre-tightening assembly 5 can include a pressure roller 51 and a pressure roller shaft 52.

[0034] The pressure roller 51 is used to directly apply pressure to the outer side of the leaf spring 33 of the constant force spring 3.

[0035] The pressure roller shaft 52 is used to provide support for the pressure roller 51.

[0036] In some embodiments, the pressure roller 51 is rotatably sleeved on the pressure roller shaft 52, and the two ends of the pressure roller shaft 52 are mounted on the fixed seat 2. In some embodiments, the pressure roller 51 is fixedly sleeved on the pressure roller shaft 52, and the two ends of the pressure roller shaft 52 are rotatably mounted on the fixed seat 2 through bearings, respectively.

[0037] ​Effects that can be achieved by the foregoing embodiments include but are not limited to: (1) by using the rolling contact between the pressure wheel and the outer side of the leaf of the constant force spring, the pressure applied to the outer side of the leaf of the constant force spring can effectively prevent the leaf of the constant force spring from being deformed in the process of stretching and retracting, thereby avoiding the leaf of the constant force spring from vibrating in the process of stretching and retracting, the process of testing the load force of the constant force spring is more stable, and the accuracy of the test result is also higher; (2) the pressure assembly composed of the pressure wheel and the pressure wheel shaft has a simple structure and reliable connection.

[0038] In some embodiments, the pre-tightening assembly 5 can include a first adjusting rail 53 and a second adjusting rail 54 parallel to each other.

[0039] The first adjusting rail 53 and the second adjusting rail 54 are both used for adjusting the positions of the two ends of the pressure wheel shaft 52. In some embodiments, the two ends of the pressure wheel shaft 52 are respectively installed on the fixed seat 2 through the first adjusting rail 53 and the second adjusting rail 54, and the two ends of the pressure wheel shaft 52 can respectively move along the first adjusting rail 53 and the second adjusting rail 54. In some embodiments, the first adjusting rail 53 and the second adjusting rail 54 respectively have an included angle (such as an included angle of 90 degrees, 45 degrees, etc.) with the track 1, and the first adjusting rail 53 and the second adjusting rail 54 respectively have an included angle (such as an included angle of 90 degrees, 45 degrees, etc.) with the axis of the pressure wheel shaft 52. That is, the first adjusting rail 53 and the second adjusting rail 54 can not be parallel to the track 1, and the first adjusting rail 53 and the second adjusting rail 54 can also not be parallel to the pressure wheel shaft 52. In some embodiments, the first adjusting rail 53 and the second adjusting rail 54 are respectively perpendicular to the track 1, and the first adjusting rail 53 and the second adjusting rail 54 are respectively perpendicular to the pressure wheel shaft 52, that is, the first adjusting rail 53, the pressure wheel shaft 52 and the track 1 can be arranged along three mutually orthogonal directions, and the second adjusting rail 54, the pressure wheel shaft 52 and the track 1 can be arranged along three mutually orthogonal directions.

[0040] Effects that can be achieved by the foregoing embodiments include but are not limited to: the positions of the pressure wheel and the pressure wheel shaft of the pre-tightening assembly can be adjusted through the first adjusting rail and the second adjusting rail, so that appropriate pressure can be applied to the outer side of the leaf of the constant force spring of different models, and the adaptability is strong.

[0041] In some embodiments, the number of the first adjusting rail 53 and the second adjusting rail 54 is multiple, and the multiple first adjusting rails 53 and the multiple second adjusting rails 54 are correspondingly arranged one by one. In some embodiments, the multiple first adjusting rails 53 are arranged at intervals along the extension direction A of the track 1, and the multiple second adjusting rails 54 are arranged at intervals along the extension direction A of the track 1.

[0042] The effects that can be achieved by the foregoing embodiments include but are not limited to: the pressure roller shaft can change the position of the pressure roller in the extension direction of the track by cooperating with different first adjusting guide rails and different second adjusting guide rails, and can apply pressure to different positions on the outer side of the spring leaf of the constant force spring, and is highly adaptable.

[0043] In some embodiments, the pre-tightening assembly 5 can include a position adjusting assembly 55.

[0044] The position adjusting assembly 55 is used to adjust and limit the positions of the two ends of the pressure roller shaft 52 on the first adjusting guide rail 53 and the second adjusting guide rail 54, respectively.

[0045] The effects that can be achieved by the foregoing embodiments include but are not limited to: (1) the position of the pressure roller shaft on the first adjusting guide rail and the second adjusting guide rail can be adjusted by the position adjusting assembly, so as to adjust the size of the pressure applied by the pressure roller to the outer side of the spring leaf of the constant force spring; (2) suitable pressure can be applied to the outer side of the spring leaf of different models of constant force springs, and the adaptability is high.

[0046] As shown in FIG. 1, Figure 1 In some embodiments, the first adjusting guide rail 53 and the second adjusting guide rail 54 are in the form of a strip-shaped hole.

[0047] In some embodiments, the first adjusting guide rail 53 and / or the second adjusting guide rail 54 can include a guide rail and a sliding block. The guide rail is mounted on the fixed seat 2, and the two ends of the pressure roller shaft are slidingly mounted on the guide rail through the sliding blocks. The structure of the guide rail and the sliding block is not shown in the figure.

[0048] Figure 2 FIG. 1 is a structural schematic diagram of a position adjusting assembly in some embodiments of the present specification.

[0049] As shown in FIG. 1, Figure 2 In some embodiments, the position adjusting assembly 55 can include a first adjusting screw 551, a second adjusting screw 552, a first threaded hole 553, and a second threaded hole 554.

[0050] The first threaded hole 553 is arranged at one end of the first adjusting guide rail 53 in the form of a strip-shaped hole and communicates with the strip-shaped hole.

[0051] The second threaded hole 554 is arranged at one end of the second adjusting guide rail 54 in the form of a strip-shaped hole and communicates with the strip-shaped hole.

[0052] The first adjusting screw 551 is used to cooperate with the first threaded hole 553, and the front end of the first adjusting screw 551 abuts against one end of the pressure roller shaft 52.

[0053] The second adjusting screw 552 is used to cooperate with the second threaded hole 554, and the front end of the second adjusting screw 552 abuts against the other end of the pressure roller shaft 52.

[0054] The effects that can be achieved by the foregoing embodiments include but are not limited to: by screwing the first adjusting screw and the second adjusting screw, the positions of the two ends of the pressure roller shaft in the first adjusting guide rail and the second adjusting guide rail can be adjusted respectively.

[0055] In some embodiments, the position adjusting assembly 55 can include a first driving mechanism, a second driving mechanism and a pressure sensor.

[0056] The first driving mechanism and the second driving mechanism are both used to provide power for the movement of the position adjustment of the pressure roller shaft 52.

[0057] In some embodiments, the first driving mechanism and the second driving mechanism can be hydraulic driving assemblies, pneumatic driving assemblies, etc.

[0058] One end of the pressure roller shaft 52 is connected to the fixed base 2 through the first driving mechanism, and the first driving mechanism drives the one end of the pressure roller shaft 52 to move along the first adjusting guide rail 53.

[0059] The other end of the pressure roller shaft 52 is connected to the fixed base 2 through the second driving mechanism, and the second driving mechanism drives the other end of the pressure roller shaft 52 to move along the second adjusting guide rail 54.

[0060] The pressure sensor is used to collect the pressure signal applied by the pressure roller 51 to the outside of the leaf spring 33 of the constant force spring 3.

[0061] The pressure sensor is arranged on the pressure roller 51 and transmits the collected pressure signal to the first driving mechanism and the second driving mechanism, and the first driving mechanism and the second driving mechanism adjust the position of the pressure roller based on the pressure signal sensed by the pressure sensor, thereby overcoming the warping deformation of the leaf spring 33 of the constant force spring 3.

[0062] The effects that can be achieved by the foregoing embodiments include but are not limited to: by monitoring the pressure applied to the leaf spring of the constant force spring through the pressure sensor and dynamically adjusting through the first driving mechanism and the second driving mechanism, the warping deformation of the leaf spring of the constant force spring can be overcome in real time and effectively.

[0063] Figure 3 It is a structural schematic diagram of the mounting assembly in some embodiments of the present specification.

[0064] As shown in Figure 3 , the mounting assembly 24 can include a constant force spring shaft 241, a constant force spring gland 242 and two bearings 243.

[0065] The constant force spring shaft 241 is used to be sleeved in the constant force spring 3 and fix the fixed end 32 of the constant force spring 3.

[0066] A constant force spring cover 242 is used to limit the position of the constant force spring 3 on the constant force spring shaft 241. In some embodiments, the constant force spring cover 242 can be one, and one end of the constant force spring 3 is limited by the limiting boss on the constant force spring shaft 241, and the other end of the constant force spring 3 is limited by the constant force spring cover 242 which is detachably and fixedly installed on the constant force spring shaft 241. In some embodiments, the constant force spring cover 242 can be two, and both ends of the constant force spring 3 are limited by the constant force spring cover 242 which is detachably and fixedly installed on the constant force spring shaft 241.

[0067] Two bearings 243 are used to rotatably connect both ends of the constant force spring shaft 241 to the fixed base 2.

[0068] The effects that can be achieved by the foregoing embodiments include but are not limited to: the constant force spring can be rotatably installed on the fixed base through the installation assembly.

[0069] Figure 4 is a structural schematic diagram of a performance testing device 400 for a constant force spring in some embodiments of the present specification.

[0070] As shown in Figure 4 , the performance testing device 400 can include a base plate 6, the anti-deformation pre-tightening device 100 described in any of the foregoing embodiments, a driving assembly 7 and a counting assembly 9.

[0071] The base plate 6 is used to install the anti-deformation pre-tightening device 100 and / or the driving assembly 7.

[0072] The anti-deformation pre-tightening device 100 is used to install and deform the constant force spring 3, and the specific structure of the anti-deformation pre-tightening device 100 can refer to the foregoing description of Figures 1-3 In some embodiments, the anti-deformation pre-tightening device 100 is installed on the base plate 6.

[0073] The driving assembly 7 is used to drive the free end 34 of the constant force spring 3 to move along the track 1. In some embodiments, the driving assembly 7 is installed on the base plate 6. The specific structure of the driving assembly 7 can refer to the description of Figure 5

[0074] The counting assembly 9 is used to record the number of times the free end 34 of the constant force spring 3 is driven by the driving assembly 7 to move along the track 1.

[0075] The effects that can be achieved by the foregoing embodiments include but are not limited to: the number of times the constant force spring is driven by the driving assembly to move back and forth can be recorded by the counting assembly to determine the service life of the constant force spring.

[0076] In some embodiments, the counting assembly 9 can include a counter 91 and a magnet trigger 92.​

[0077] The counter 91 is used to record the number of times the constant force spring is driven to reciprocate by the driving assembly. In some embodiments, the counter 91 can be installed on the base plate 6 through the counter mounting seat.

[0078] The magnet trigger 92 is used to trigger the counter 91 to count. In some embodiments, the magnet trigger 92 can be installed on the adapter mechanism 41 of the sliding seat 4.

[0079] During the process of driving the adapter mechanism 41 of the sliding seat 4 to reciprocate, the magnet trigger 92 enters the set range of the counter 91 once, and the counter 91 counts once.

[0080] In some embodiments, the performance testing device 400 can include a limiting assembly 10. The limiting assembly 10 is used to limit the stroke of the reciprocating motion of the sliding seat 4.

[0081] In some embodiments, the limiting assembly 10 can include a first stroke limiting switch 101, a limiting trigger block 102, and a second stroke limiting switch 103.

[0082] In some embodiments, the first stroke limiting switch 101 and the second stroke limiting switch 103 are respectively installed on the base plate 6. In some embodiments, the limiting trigger block 102 is installed on the adapter mechanism 41, and the adapter mechanism 41 drives the limiting trigger block 102 to pass through the first stroke limiting switch 101 and the second stroke limiting switch 103.

[0083] In some embodiments, the performance testing device 400 can include a torque sensor. The torque sensor is used to collect the torque signal of the constant force spring shaft 241 when following the rotation of the constant force spring 3. In some embodiments, the torque sensor can collect the torque when the constant force spring 3 breaks or fails. In some embodiments, the motor of the driving assembly 7 includes a processor for controlling the working state of the motor, and the torque sensor can transmit the torque signal to the processor. In some embodiments, the processor can instruct the motor to stop driving in time when judging that the constant force spring 3 breaks or fails. In some embodiments, the torque sensor can be installed on the constant force spring shaft 241.

[0084] The effects that can be achieved by the foregoing embodiments include but are not limited to: (1) the driving assembly can monitor the process of performance testing of the constant force spring through the torque signal collected by the torque sensor; (2) the driving assembly can end the testing process in time when the constant force spring breaks or fails.

[0085] In some embodiments, the performance testing device 400 can comprise a prompting device. The prompting device is used to send a prompt signal when the constant force spring 3 is broken or failed. The prompting device can be, for example, an indicator light, a buzzer, a signal transmitter, etc. In some embodiments, the prompting device can send a sound, light, etc. signal. In other embodiments, the prompting device can also send information, such as a short message, to the user terminal through the network to prompt the user. In some embodiments, the processor in the motor of the driving assembly 7 instructs the prompting device to send a prompt signal when it is determined that the constant force spring 3 is broken or failed.

[0086] The effects that can be achieved by the foregoing embodiments include, but are not limited to: a prompt signal can be sent by the prompting device when the constant force spring is broken or failed.

[0087] Figure 5 is a structural schematic diagram of a performance testing device 500 for a constant force spring in some other embodiments of the present specification.

[0088] As shown in Figure 5 , the performance testing device 500 can comprise a base plate 6, a deformation prevention pre-tightening device, a driving assembly 7, and a tension assembly 8.

[0089] The base plate 6 is used to mount the deformation prevention pre-tightening device and / or the driving assembly 7.

[0090] The deformation prevention pre-tightening device 100 is used to mount and deform the constant force spring 3, and the specific structure can refer to the description of the foregoing Figures 1-3 In some embodiments, the deformation prevention pre-tightening device 100 is mounted on the base plate 6.

[0091] The driving assembly 7 is used to drive the tension assembly 8 to move along the track 1. In some embodiments, the driving assembly 7 is mounted on the base plate 6.

[0092] In some embodiments, the driving assembly 7 can comprise a lead screw 71, a lead screw nut, a second translational connector 73, a shaft coupling 74, and a motor 75.

[0093] The lead screw 71 is mounted on the base plate 6 through a lead screw mounting seat, and the lead screw nut is connected on the lead screw 71.

[0094] The second translational connector 73 is used to transmit driving force. In some embodiments, the lead screw nut on the lead screw 71 is detachably connected with the tension assembly 8 through the second translational connector 73.

[0095] The motor 75 is used to provide driving force. The output end of the motor 75 is connected with the lead screw 71 through the shaft coupling 74. In some embodiments, the motor 75 is mounted on the base plate 6 through a motor mounting seat.

[0096] In some embodiments, the driving assembly can include a lead screw 71, a lead screw nut, a first translation connector 72, a second translation connector 73, a coupling 74, and a motor 75.

[0097] The lead screw 71 is mounted on the base plate 6 through a lead screw mounting seat, and a lead screw nut is connected on the lead screw 71.

[0098] The first translation connector 72 is used to transmit driving force. In some embodiments, the lead screw nut on the lead screw is detachably connected with the sliding seat 4 through the first translation connector 72, so as to transmit the driving force of the motor 75 to the sliding seat 4.

[0099] The second translation connector 73 is used to transmit driving force. In some embodiments, the lead screw nut on the lead screw 71 is detachably connected with the tension assembly 8 through the second translation connector 73, so as to transmit the driving force of the motor 75 to the tension assembly 8.

[0100] The motor 75 is used to provide driving force. The output end of the motor 75 is connected with the lead screw 71 through the coupling 74. In some embodiments, the motor 75 is mounted on the base plate 6 through a motor mounting seat.

[0101] The tension assembly 8 is used to pull the free end 34 of the constant force spring 3 to reciprocate along the track 1 and display and / or record tension.

[0102] In some embodiments, the tension assembly 8 can include a tension meter and a tension hook. The tension meter is connected with the second translation connector 73, and the tension hook is used to connect with the sliding seat 4.

[0103] The foregoing embodiments can achieve effects including but not limited to: through the detachable connection of the first translation connector and the second translation connector, flexible conversion between the life test and the tension test can be realized.

[0104] In the present specification, unless specifically defined and limited otherwise, the terms "mount", "connect", "connect", "fix", and the like should be understood in a broad sense, for example, "connect" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium; can be the internal connection of two elements, or can represent the interaction relationship between two elements. Unless otherwise specifically defined, the above terms in the present specification can be understood according to the specific meaning of the person skilled in the art according to the specific circumstances.

[0105] Also, the description of embodiments of the present specification uses specific terminology to describe certain features, components, and characteristics. As such, the use of such terms as "one embodiment," "an embodiment," and / or "some embodiments" to describe one or more features, components and / or characteristics of an embodiment or embodiments is not meant to limit the embodiment(s) or limit the specified feature(s), component(s) and / or characteristic(s) to that embodiment or to that implementation. Thus, use of such terms is an oversight that will not limit the described feature, component and / or characteristic to that embodiment or implementation.

[0106] Similarly, it is to be noticed that the term "comprising", used in the description, is not meant to exclude other features, components, and / or characteristics from the embodiment or implementation of the present specification. For example, the apparatus of an embodiment or implementation of the present specification as described above is not meant to exclude any additional feature, component, and / or characteristic, from the described apparatus. Furthermore, the terms "a" and "an," as used in the description, mean "one or more" unless explicitly stated otherwise.

[0107] Some embodiments use numerical ranges to describe quantities of components, attributes, etc. It should be understood that such numerical ranges described in the embodiments are, in some examples, modified by the term "about". Unless otherwise specified, "about" indicates that the described value allows for variation due to experimental error, measurement technique, measurement devices, or the like. Accordingly, in some embodiments, numerical parameters in the specification and claims are approximations. Although these numerical ranges and parameters are approximations, in certain embodiments, they are intended to be exact. It is therefore to be understood that the value of the numerical parameters set forth in the detailed description and claims are meant as approximations, unless otherwise stated.

[0108] Each patent, patent application, publication, document, article, book, instruction manual, and / or other material cited in this specification is hereby incorporated by reference in its entirety for all purposes to the same extent as if each individual publication, document, article, book, instruction manual, and / or other material were specifically and individually indicated to be incorporated by reference in its entirety for all purposes. Except in instances where the present specification and / or claims otherwise indicate, the citation of any reference in this specification is not to be construed as an admission that it is prior art with respect to the present specification and / or claims.

[0109] Finally, it should be understood that the embodiments described herein are only given by way of example and that other modifications can occur to persons skilled in the art. Therefore, the scope of the present description is not intended to be limited to the embodiments described herein but is only limited by the claims that follow.

Claims

1. A deformation-pre-tightening device for a constant force spring, characterized in that, include: track; A fixed base is provided at one end of the track. The fixed base is provided with a mounting assembly for mounting the fixed end of the constant force spring so that the constant force spring can rotate around its own central axis. The fixed base includes at least a first vertical plate and a second vertical plate, and a reference scale line is provided on the first vertical plate and / or the second vertical plate. A sliding seat is slidably disposed on the track, and the sliding seat is provided with a connecting mechanism for connecting the free end of the constant force spring; A pre-tightening assembly is disposed between the mounting assembly and the adapter mechanism to apply pressure to the outer side of the spring leaf of the constant force spring. The outer side of the spring leaf is the outer surface of the portion of the spring leaf stretched out through the free end of the constant force spring. The outer surface is the side of the spring leaf that contacts the next turn of the spring leaf to be rolled during the rolling process. The preload assembly includes a pressure roller and a pressure roller shaft. The pressure roller is rotatably mounted on the pressure roller shaft, and both ends of the pressure roller shaft are mounted on the fixed base. The pressure roller is used to apply pressure to the outer side of the constant force spring. The pretensioning assembly further includes a first adjusting guide rail and a second adjusting guide rail that are parallel to each other. The first adjusting guide rail has an angle with the track and an angle with the axis of the pressure roller shaft. The two ends of the pressure roller shaft are respectively mounted on the fixed base via the first adjusting guide rail and the second adjusting guide rail, and the two ends of the pressure roller shaft can move along the first adjusting guide rail and the second adjusting guide rail, respectively.

2. The apparatus according to claim 1, characterized in that, The number of the first adjustment rail and the second adjustment rail is multiple, and the multiple first adjustment rails are arranged in a one-to-one correspondence with the multiple second adjustment rails; the multiple first adjustment rails are spaced apart along the extension direction of the track; the multiple second adjustment rails are arranged spaced apart along the extension direction of the track.

3. The apparatus according to claim 1, characterized in that, The pre-tightening assembly further includes a position adjustment assembly, which is used to adjust and limit the positions of the two ends of the pressure roller shaft on the first adjustment guide rail and the second adjustment guide rail, respectively.

4. The apparatus according to claim 3, characterized in that, The first and second adjusting guide rails are in the form of strip holes.

5. The apparatus according to claim 4, characterized in that, The position adjustment assembly includes a first adjusting screw, a second adjusting screw, a first threaded hole, and a second threaded hole; the first threaded hole is located at one end of the first adjusting guide rail and communicates with the strip hole, the second threaded hole is located at one end of the second adjusting guide rail and communicates with the strip hole; the first adjusting screw can engage with the first threaded hole, and the front end of the first adjusting screw abuts against one end of the pressure roller shaft; the second adjusting screw can engage with the second threaded hole, and the front end of the first adjusting screw abuts against the other end of the pressure roller shaft.

6. The apparatus according to claim 3, characterized in that, The position adjustment assembly includes a first drive mechanism, a second drive mechanism, and a pressure sensor; one end of the pressure roller shaft is connected to the fixed base through the first drive mechanism, and the other end of the pressure roller shaft is connected to the fixed base through the second drive mechanism. The first drive mechanism drives one end of the pressure roller shaft to move along the first adjustment guide rail, and the second drive mechanism drives the other end of the pressure roller shaft to move along the second adjustment guide rail. The pressure sensor is disposed on the pressure roller. The drive mechanism adjusts the position of the pressure roller shaft based on the pressure sensed by the pressure sensor.

7. A performance testing device for a constant force spring, characterized in that, include: Base plate; The anti-deformation pre-tightening device for a constant force spring according to any one of claims 1-6, wherein the anti-deformation pre-tightening device is mounted on the base plate; A drive assembly for driving the free end of the constant force spring assembly to move along the track, the drive assembly being mounted on the base plate; A counting component is used to record the number of times the drive component drives the free end of the constant force spring to reciprocate.

8. A performance testing device for a constant force spring, characterized in that, include: Base plate; The anti-deformation pre-tightening device for a constant force spring according to any one of claims 1-6, wherein the anti-deformation pre-tightening device is mounted on the base plate; A tension component for pulling the free end of the constant force spring assembly along the track and displaying and / or recording the tension; A drive assembly for driving the tension assembly to move along the track, the drive assembly being mounted on the base plate.

Images