Linear force limiting device

Abstract

The utility model discloses a linear force limiting device which is characterized in that a first mounting part defines a mounting space, and at least part of a second mounting part is arranged in the mounting space; a mounting hole is formed in the side wall of the first mounting piece, the second mounting piece is provided with a first concave part with the wall surface being an arc surface, at least part of the fixing piece is arranged in the mounting hole, part of the structure of the first matching piece is arranged in the first concave part, the surface of the part of the structure is an arc surface, and the elastic piece is arranged in the mounting hole and is compressed between the fixing piece and the first matching piece. Therefore, according to the linear force limiting device, when the transmitted force is too large, the second mounting piece can extrude the first matching piece to further compress the elastic piece so that the first matching piece can slide off the first concave part, and automatic force releasing is achieved; the influence of excessive force transmission on equipment (such as a tension and compression testing machine and a manual press) matched with the linear force limiting device is reduced, so that the probability of damage to the equipment (such as the tension and compression testing machine and the manual press) matched with the linear force limiting device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of force limiting protection, in particular to a linear force limiting device. Background Art

[0002] In related technologies, inside equipment such as tensile and compressive testing machines and manual presses, linear operations are all driven by hydraulic cylinders or motors to drive ball screws. However, during the linear operation, due to operation errors, excessive force transmission is extremely likely to cause damage to the equipment and affect the normal use of the equipment. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a linear force limiting device, which can reduce the probability of damage to the equipment (such as tensile and compressive testing machines, manual presses, etc.) used in cooperation with the linear force limiting device.

[0004] The linear force limiting device according to the utility model includes: a first mounting member and a second mounting member, the first mounting member defining an installation space, and at least a part of the second mounting member being disposed in the installation space; a force limiting assembly, a side wall of the first mounting member having a mounting hole communicating with the installation space, the second mounting member having a first recessed portion with an arc-shaped wall surface, the force limiting assembly including: a fixing member, an elastic member, and a first fitting member, at least a part of the fixing member being fixed in the mounting hole, a part of the structure of the first fitting member being disposed in the first recessed portion and the surface of this part of the structure being arc-shaped, and the elastic member being disposed in the mounting hole and being compressed between the fixing member and the first fitting member.

[0005] According to the linear force limiting device of the utility model, when the force transmission is too large, the second mounting member will squeeze the first fitting member and then compress the elastic member so that the first fitting member slips out of the first recessed portion, realizing automatic force relief, reducing the influence of excessive force transmission on the equipment (such as tensile and compressive testing machines, manual presses, etc.) used in cooperation with the linear force limiting device, and reducing the probability of damage to the equipment (such as tensile and compressive testing machines, manual presses, etc.) used in cooperation with the linear force limiting device.

[0006] In some examples of the utility model, the first fitting member is configured as a sphere.

[0007] In some examples of the utility model, the force limiting assembly further includes: a ball bowl, the ball bowl being disposed between the elastic member and the first fitting member, the side of the ball bowl facing the first fitting member having a second recessed portion, and a part of the structure of the first fitting member being disposed in the second recessed portion.

[0008] In some examples of the present utility model, the mounting hole includes a first threaded hole and a first through hole, and the fixing member is in threaded fit with the first threaded hole.

[0009] In some examples of the present utility model, the diameter of the first threaded hole is greater than the diameter of the first through hole.

[0010] In some examples of the present utility model, the linear force limiting device further includes: a holding assembly. The side wall of the first mounting member has a mounting groove communicating with the mounting space. The second mounting member has a third recess with an arc-shaped wall surface. The holding assembly includes: a holding frame and a second fitting member. At least part of the holding frame is fixed in the mounting groove. The second fitting member is arranged in the holding frame. Part of the structure of the second fitting member is arranged in the third recess and the surface of this part of the structure is arc-shaped.

[0011] In some examples of the present utility model, the second fitting member is configured as a sphere.

[0012] In some examples of the present utility model, the holding frame has a fourth recess with an arc-shaped wall surface, and part of the structure of the second fitting member is arranged in the fourth recess.

[0013] In some examples of the present utility model, the linear force limiting device further includes: a sensor. Part of the structure of the second mounting member extends out of the mounting space and has a convex platform. Along the movement direction of the second mounting member, the orthographic projection of the convex platform and the orthographic projection of the first mounting member have an overlapping area. The sensor is fixed on the first mounting member and corresponds to the convex platform. The sensor is configured to detect whether the convex platform is located at a preset position.

[0014] In some examples of the present utility model, the first mounting member has a first mounting portion and / or the second mounting member has a second mounting portion.

[0015] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0017] Figure 1 is a cross-sectional view of the linear force limiting device according to an embodiment of the present utility model;

[0018] Figure 2 is a top view (perspective view) of the linear force limiting device according to an embodiment of the present utility model;

[0019] Figure 3 It is a schematic diagram of the first mounting member according to an embodiment of the present utility model;

[0020] Figure 4 It is a schematic diagram of the second mounting member according to an embodiment of the present utility model;

[0021] Figure 5 It is a schematic diagram of the holding assembly according to an embodiment of the present utility model;

[0022] Figure 6 It is a schematic diagram of the cage according to an embodiment of the present utility model;

[0023] Figure 7 It is a cross-sectional view of the linear force limiting device according to an embodiment of the present utility model (in the normal state);

[0024] Figure 8 It is a cross-sectional view of the linear force limiting device according to an embodiment of the present utility model (when the second mounting member slides upward and disengages);

[0025] Figure 9 It is a cross-sectional view of the linear force limiting device according to an embodiment of the present utility model (when the second mounting member slides downward and disengages).

[0026] Reference numerals:

[0027] Linear force limiting device 100;

[0028] First mounting member 10; mounting space 11; mounting hole 12; first threaded hole 121; first through hole 122; first mounting portion 13; mounting groove 14;

[0029] Second mounting member 20; first recessed portion 21; second mounting portion 22; third recessed portion 23; boss 24;

[0030] Force limiting assembly 30; fixing member 31; elastic member 32; first mating member 33; ball bowl 34; second recessed portion 341;

[0031] Holding assembly 40; cage 41; fourth recessed portion 411; second mating member 42;

[0032] Dust cover 50; sensor 60. Detailed implementation manners

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0034] Reference is made below Figures 1-9 to describe the linear force limiting device 100 according to an embodiment of the present utility model.

[0035] As Figures 1-9 shown, the linear force limiting device 100 according to an embodiment of the present utility model includes: a first mounting member 10, a second mounting member 20, and a force limiting assembly 30.

[0036] The first mounting member 10 defines an installation space 11, and at least a part of the second mounting member 20 is disposed in the installation space 11; a side wall of the first mounting member 10 has a mounting hole 12 communicating with the installation space 11, the second mounting member 20 has a first recess 21 with an arc-shaped wall surface, and the force limiting assembly 30 includes: a fixing member 31, an elastic member 32, and a first fitting member 33. At least a part of the fixing member 31 is fixed in the mounting hole 12, a part of the structure of the first fitting member 33 is disposed in the first recess 21 and the surface of this part of the structure is arc-shaped, and the elastic member 32 is disposed in the mounting hole 12 and is compressed between the fixing member 31 and the first fitting member 33.

[0037] Among them, the first mounting member 10 can define the installation space 11, and at least a part of the second mounting member 20 is disposed in the installation space 11. That is to say, a part of the second mounting member 20 is disposed in the installation space 11, or the second mounting member 20 is entirely disposed in the installation space 11.

[0038] The side wall of the first mounting member 10 has the mounting holes 12, the number of the mounting holes 12 is multiple, the number of the mounting holes 12 can be, but is not limited to, eight, ten, twelve, etc. As some embodiments of the present application, the number of the mounting holes 12 is twelve. As some embodiments of the present application, among the multiple mounting holes 12, some mounting holes 12 can be a group, and the mounting holes 12 in a group can be arranged at intervals in the circumferential direction of the first mounting member 10, and multiple groups of mounting holes 12 can be arranged at intervals

[0039] in the axial direction of the first mounting member 10. The mounting holes 12 are communicated with the installation space 11.

[0040] The second mounting member 20 has the first recesses 21, the number of the first recesses 21 is multiple, the number of the first recesses 21 can be, but is not limited to, eight, ten, twelve, etc. As some embodiments of the present application, the number of the first recesses 21 is twelve, and the number of the multiple first recesses 21 is the same as that of the multiple mounting holes 12 and they correspond one by one. The wall surface of the first recess 21 is arc-shaped.

[0041] The force-limiting assembly 30 includes: a fixing member 31, an elastic member 32, and a first mating member 33. The number of force-limiting assemblies 30 is multiple, and the number of force-limiting assemblies 30 can be, but is not limited to, eight, ten, twelve, etc. As some embodiments of the present application, the number of force-limiting assemblies 30 is twelve. The number of multiple force-limiting assemblies 30 is the same as and corresponds one-to-one to the number of multiple mounting holes 12.

[0042] At least a part of the fixing member 31 is fixed in the mounting hole 12, that is to say, a part of the fixing member 31 is fixed in the mounting hole 12, or all of the fixing member 31 is fixed in the mounting hole 12. The fixing member 31 is fixedly connected to the mounting hole 12, and the connection manner between the fixing member 31 and the mounting hole 12 can be, but is not limited to, welding, threaded connection, etc. As some embodiments of the present application, the fixing member 31 and the mounting hole 12 are connected by threaded connection.

[0043] A part of the structure of the first mating member 33 is disposed in the first recess 21, and the surface of this part of the structure is an arc surface, and the surface of this part of the structure can cooperate with the arc surface of the first recess 21.

[0044] The elastic member 32 is disposed in the mounting hole 12. Specifically, the elastic member 32 can be compressed along the extending direction of the mounting hole 12, and the elastic member 32 is compressed between the fixing member 31 and the first mating member 33 so that the first mating member 33 cooperates with the first recess 21.

[0045] As some embodiments of the present application, the first mounting member 10 has a first mounting portion 13, the second mounting member 20 has a second mounting portion 22, and the linear force-limiting device 100 can be connected to devices such as a tensile and compressive force testing machine and a manual press through the first mounting portion 13. The linear force-limiting device 100 can be connected to a measurement sensor through the second mounting portion 22. The measurement sensor can be used to collect force values or other information to determine whether devices such as a tensile and compressive force testing machine and a manual press are working properly. Such a setting can reliably connect the linear force-limiting device 100 to devices such as a tensile and compressive force testing machine and a manual press and the measurement sensor.

[0046] As some embodiments of the present application, the first mounting member 10 has a first mounting portion 13, and the linear force-limiting device 100 can be connected to a measurement sensor through the first mounting portion 13. The measurement sensor can be connected to devices such as a tensile and compressive force testing machine and a manual press. As some embodiments of the present application, the second mounting member 20 has a second mounting portion 22, and the linear force-limiting device 100 can be connected to a measurement sensor through the second mounting portion 22. The measurement sensor can be connected to devices such as a tensile and compressive force testing machine and a manual press.

[0047] As some embodiments of the present application, such as Figure 1As shown, the linear force limiting device 100 further includes a dust cover 50. The dust cover 50 is provided on the first mounting member 10. The dust cover 50 can prevent dust and small particulate objects from entering the gap between the first mounting member 10 and the second mounting member 20, which is beneficial to improving the use reliability of the linear force limiting device 100.

[0048] In some embodiments of the present application, the device used in conjunction with the linear force limiting device 100 can be a tensile and compressive testing machine. The linear force limiting device 100 can be connected to the tensile and compressive testing machine. The tensile and compressive testing machine can transmit the tensile and compressive force to the linear force limiting device 100 to apply the tensile and compressive force through the linear force limiting device 100. During the process of applying the tensile and compressive force through the linear force limiting device 100, the first fitting 33 cooperates with the first recess 21 to keep the second mounting member 20 in its current position, so that the tensile and compressive testing machine can reliably apply the tensile and compressive force through the linear force limiting device 100. When the transmitted force is too large, the second mounting member 20 will squeeze the first fitting 33 and then compress the elastic member 32 to cause the first fitting 33 to slip out of the first recess 21, realizing automatic force relief.

[0049] Thus, through the linear force limiting device 100 of the present application, when the transmitted force is too large, the second mounting member 20 will squeeze the first fitting 33 and then compress the elastic member 32 to cause the first fitting 33 to slip out of the first recess 21, realizing automatic force relief, reducing the impact of excessive transmitted force on the devices (such as tensile and compressive testing machines, manual presses, etc.) used in conjunction with the linear force limiting device 100, and reducing the probability of damage to the devices (such as tensile and compressive testing machines, manual presses, etc.) used in conjunction with the linear force limiting device 100.

[0050] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the first fitting 33 is configured as a sphere. A part of the structure of the sphere is arranged in the first recess 21, and the surface of the sphere is an arc surface. Such a setting can make the structural form of the first fitting 33 reasonable. Even if the first fitting 33 rotates during the installation process, the first fitting 33 can still be in arc surface cooperation with the first recess 21, making the slipping of the first fitting 33 from the first recess 21 smooth and steady. Moreover, such a setting can provide a good supporting effect on the second mounting member 20, which is beneficial to improving the use reliability of the linear force limiting device 100.

[0051] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the force limiting assembly 30 further includes: a ball bowl 34. The ball bowl 34 is arranged between the elastic member 32 and the first fitting 33. The side of the ball bowl 34 facing the first fitting 33 has a second recess 341, and a part of the structure of the first fitting 33 is arranged in the second recess 341.

[0052] Among them, the force-limiting component 30 further includes a ball bowl 34. The ball bowl 34 is disposed between the elastic member 32 and the first fitting member 33. Specifically, the elastic member 32 is compressed between the fixing member 31 and the ball bowl 34, and the ball bowl 34 is disposed between the elastic member 32 and the first fitting member 33. As some embodiments of the present application, the ball bowl 34 and the elastic member 32 are connected by welding. As some embodiments of the present application, the ball bowl 34 and the elastic member 32 are in abutment.

[0053] The side of the ball bowl 34 facing the first fitting member 33 has a second recess 341, and a part of the structure of the first fitting member 33 is disposed in the second recess 341. The number of the ball bowls 34 is multiple, and the number of the ball bowls 34 can be, but is not limited to, eight, ten, twelve, etc. The number of the mounting holes 12, the first fitting members 33, the first recesses 21, the elastic members 32 and the ball bowls 34 is the same and they are arranged in one-to-one correspondence. As some embodiments of the present application, the number of the ball bowls 34 is twelve.

[0054] As some embodiments of the present application, the surface of the ball bowl 34 facing the elastic member 32 is a plane. As some embodiments of the present application, the wall surface of the second recess 341 is an arc surface.

[0055] By making the force-limiting component 30 further include the ball bowl 34 and making a part of the structure of the first fitting member 33 be disposed in the second recess 341, the elastic member 32 can be pressed against the first fitting member 33, so that the first fitting member 33 is stably disposed in the mounting hole 12 and cooperates with the first recess 21, which is beneficial to improving the structural rationality of the linear force-limiting device 100.

[0056] In some embodiments of the present utility model, as Figure 1 shown, the mounting hole 12 includes a first threaded hole 121 and a first through hole 122, and the fixing member 31 is in threaded cooperation with the first threaded hole 121.

[0057] Among them, the mounting hole 12 includes a first threaded hole 121 and a first through hole 122. Specifically, along the radial direction of the first mounting member 10 (i.e., Figure 1 the X direction shown), the one relatively close to the axis of the first mounting member 10 is the first through hole 122, and the one relatively far from the axis of the first mounting member 10 is the first threaded hole 121. That is to say, the first threaded hole 121 is located outside the first through hole 122.

[0058] The fixing member 31 is in threaded cooperation with the first threaded hole 121. As some embodiments of the present application, the fixing member 31 has an external thread, and the first threaded hole 121 has an internal thread that cooperates with the external thread. The fixing member 31 is disposed in the first threaded hole 121, and the fixing member 31 can be screwed into the first threaded hole 121 from the outside along the radial direction of the first mounting member 10 (i.e., Figure 1 the X direction shown).

[0059] The elastic member 32 is disposed in the first through hole 122, the ball bowl 34 is disposed in the first through hole 122, and a part of the structure of the first fitting 33 is disposed in the first through hole 122. The first through hole 122 can position the elastic member 32, the ball bowl 34 and the first fitting 33 to ensure the precise relative position between the components.

[0060] The fixing member 31 has opposite ends. Along the radial direction of the first mounting member 10 (i.e., Figure 1 the X direction shown), one end close to the axis of the first mounting member 10 can abut against the elastic member 32.

[0061] In some embodiments of the present application, screwing the fixing member 31 into the first threaded hole 121 gradually from the outside can gradually compress the elastic member 32 so that the elastic member 32 is compressed between the fixing member 31 and the first fitting 33. In some embodiments of the present application, gradually screwing the fixing member 31 out of the first threaded hole 121 can reduce the pressure of the fixing member 31 on the elastic member 32.

[0062] By the threaded fit between the fixing member 31 and the first threaded hole 121, it is convenient to install the fixing member 31, and the installation of the fixing member 31 can be firm, reducing the probability that the fixing member 31 comes out of the mounting hole 12 under the action of the elastic member 32. In addition, such a setting facilitates adjusting the relative position of the fixing member 31, thereby facilitating adjusting the pressing force of the fixing member 31 on the elastic member 32 (i.e., facilitating adjusting the compression amount of the elastic member 32).

[0063] In some embodiments of the present invention, as Figure 1 shown, the diameter of the first threaded hole 121 is larger than the diameter of the first through hole 122.

[0064] By making the diameter of the first threaded hole 121 larger than the diameter of the first through hole 122, the positioning accuracy of the first through hole 122 for the elastic member 32, the ball bowl 34 and the first fitting 33 can be improved, reducing the probability that the elastic member 32, the ball bowl 34 and the first fitting 33 shake, which is beneficial to improving the use reliability of the linear force limiting device 100.

[0065] In some embodiments of the present invention, as Figure 1 , Figure 5 and Figure 6 shown, the linear force limiting device 100 further includes: a holding assembly 40. The side wall of the first mounting member 10 has a mounting groove 14 communicating with the mounting space 11. The second mounting member 20 has a third recess 23 with an arc-shaped wall surface. The holding assembly 40 includes: a holder 41 and a second fitting 42. At least a part of the holder 41 is fixed in the mounting groove 14, the second fitting 42 is disposed in the holder 41, and a part of the structure of the second fitting 42 is disposed in the third recess 23 and the surface of this part of the structure is arc-shaped.

[0066] Among them, the linear force limiting device 100 further includes a holding assembly 40. The side wall of the first mounting member 10 has mounting grooves 14. The number of the mounting grooves 14 can be multiple, and the number of the mounting grooves 14 can be, but is not limited to, two, three, four, etc. As some embodiments of the present application, the number of the mounting grooves 14 is three, and the three mounting grooves 14 are arranged at equal intervals along the circumferential direction of the first mounting member 10. The mounting grooves 14 are communicated with the mounting space 11. As some embodiments of the present application, the multiple mounting grooves 14 all extend along the axial direction of the first mounting member 10 (i.e., Figure 1 the Z direction shown).

[0067] The second mounting member 20 has third recesses 23. The number of the third recesses 23 can be multiple, and the number of the third recesses 23 can be, but is not limited to, three, six, nine, etc. As some embodiments of the present application, the number of the third recesses 23 is three, and the three third recesses 23 all extend along the axial direction of the first mounting member 10 (i.e., Figure 1 the Z direction shown), and the three third recesses 23 are arranged in one-to-one correspondence with the three mounting grooves 14. The wall surface of the third recess 23 is an arc surface.

[0068] The holding assembly 40 includes a holder 41 and a second fitting 42. At least part of the holder 41 is fixed in the mounting groove 14, that is to say, part of the holder 41 is fixed in the mounting groove 14, or all of the holder 41 is fixed in the mounting groove 14. As some embodiments of the present application, the three mounting grooves 14 are arranged at equal intervals along the circumferential direction of the first mounting member 10, and the three holders 41 are all arranged in the corresponding mounting grooves 14.

[0069] The number of the second fittings 42 can be multiple, and the number of the second fittings 42 can be, but is not limited to, two, three, four, etc. As some embodiments of the present application, the number of the second fittings 42 is nine.

[0070] The second fitting 42 is arranged on the holder 41. As some embodiments of the present application, three second fittings 42 can be arranged on one holder 41. Part of the structure of each second fitting 42 is arranged in the corresponding third recess 23, and the surface of the part of the second fitting 42 arranged in the third recess 23 is an arc surface.

[0071] As some embodiments of the present application, the material of the holder 41 can be, but is not limited to, nylon or other self-lubricating materials.

[0072] By fixing at least a part of the cage 41 in the mounting groove 14 and arranging a part of the structure of the second fitting 42 in the third recess 23, the coaxiality of the second mounting member 20 and the first mounting member 10 can be ensured, the probability of the second fitting 42 shifting during force relief can be reduced, and the probability of the linear force limiting device 100 failing due to mechanical errors can be reduced, which is beneficial to improving the use reliability of the linear force limiting device 100. Moreover, such an arrangement can make the second mounting member 20 and the first mounting member 10 in rolling fit, which is beneficial to reducing the friction between the second mounting member 20 and the first mounting member 10 and can improve the service life of the linear force limiting device 100.

[0073] In some embodiments of the present invention, such as Figure 1 , Figure 5 and Figure 6 shown, the second fitting 42 is configured as a sphere, and a part of the structure of the sphere is arranged in the third recess 23. Such an arrangement can make the structural form of the second fitting 42 reasonable. Even if the second fitting 42 rotates during installation, the second fitting 42 can still be in arc surface fit with the third recess 23, so that the relative movement between the second fitting 42 and the third recess 23 is stable and smooth, and the coaxiality of the second mounting member 20 and the first mounting member 10 can be effectively ensured.

[0074] In some embodiments of the present invention, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 shown, the cage 41 has a fourth recess 411 with an arc-shaped wall surface, and a part of the structure of the second fitting 42 is arranged in the fourth recess 411.

[0075] Among them, the cage 41 has a fourth recess 411, and the number of the fourth recesses 411 is the same as and corresponds one by one to the number of the second fittings 42. As some embodiments of the present application, each cage 41 has three fourth recesses 411. That is to say, three second fittings 42 are installed on each cage 41, and a part of the structure of each second fitting 42 is arranged in the corresponding fourth recess 411, and the wall surface of the fourth recess 411 is arc-shaped.

[0076] By making the cage 41 have a fourth recess 411 and arranging a part of the structure of the second fitting 42 in the fourth recess 411, the second fitting 42 can be firmly arranged in the cage 41, and the cage 41 will not affect the rotation of the second fitting 42, so that the second fitting 42 can roll smoothly with the third recess 23. Thus, the structural form of the holding assembly 40 can be made reasonable, which is beneficial to ensuring the coaxiality of the second mounting member 20 and the first mounting member 10.

[0077] In some embodiments of the present invention, such asFigure 1 , Figures 7-9 As shown in Figures 7-9 , the linear force limiting device 100 further includes: a sensor 60. A partial structure of the second mounting member 20 extends out of the mounting space 11 and has a boss 24. Along the movement direction of the second mounting member 20, the orthographic projection of the boss 24 and the orthographic projection of the first mounting member 10 have an overlapping area. The sensor 60 is fixedly arranged on the first mounting member 10 and corresponds to the boss 24. The sensor 60 is configured to detect whether the boss 24 is located at a preset position.

[0078] Among them, the linear force limiting device 100 further includes a sensor 60. A partial structure of the second mounting member 20 extends out of the mounting space 11, and the partial structure of the second mounting member 20 extending out of the mounting space 11 has a boss 24. That is to say, the boss 24 is located outside the mounting space 11. As some embodiments of the present application, the second mounting member 20 and the boss 24 are configured as an integrally formed part. The integrally formed part has good structural strength. By making the second mounting member 20 and the boss 24 integrally formed, the connection reliability between the second mounting member 20 and the boss 24 can be improved, and the probability of fracture at the connection between the second mounting member 20 and the boss 24 can be reduced.

[0079] Along the movement direction of the second mounting member 20, that is to say, along the axis direction of the first mounting member 10 (i.e., Figure 1 the Z direction shown in Figure 1 ), the orthographic projection of the boss 24 and the orthographic projection of the first mounting member 10 have an overlapping area. Specifically, a plane is set. This plane is perpendicular to the axis direction of the first mounting member 10 (i.e., Figure 1 the Z direction shown in Figure 1 ), and the normal line of this plane is parallel to the axis direction of the first mounting member 10 (i.e., Figure 1 the Z direction shown in Figure 1 ). The orthographic projection of the boss 24 on this plane and the orthographic projection of the first mounting member 10 on this plane have an overlapping area. Such a setting enables the boss 24 to abut against the first mounting member 10 when the second mounting member 20 and the first mounting member 10 have a relative displacement (when the first fitting 33 slips out of the first recess 21 to release force), thereby reducing the probability that the second mounting member 20 is completely accommodated in the mounting space 11, and thus facilitating the reset of the second mounting member 20.

[0080] The sensor 60 is fixedly arranged on the first mounting member 10, and the sensor 60 is fixedly connected to the first mounting member 10. As some embodiments of the present application, the sensor 60 and the first mounting member 10 are connected by means of bolt connection. The sensor 60 is arranged corresponding to the boss 24, and the sensor 60 is configured to detect whether the boss 24 is located at a preset position. It should be noted that when the sensor 60 corresponds to the boss 24, it is the preset position of the boss 24; when the sensor 60 does not correspond to the boss 24, the boss 24 leaves the preset position. As some embodiments of the present application, the sensor 60 can be connected to the controller. When the second mounting member 20 and the first mounting member 10 have a relative displacement (when the first engaging member 33 slips off from the first recess 21 to relieve force), the boss 24 leaves the preset position, and the sensor 60 detects that the boss 24 has left the preset position. The sensor 60 can feedback the information to the controller to control the equipment (such as a tensile and compressive testing machine, a manual press, etc.) used in cooperation with the linear force limiting device 100 to stop.

[0081] As some embodiments of the present application, as Figures 7-9 shown, the equipment used in cooperation with the linear force limiting device 100 can be a tensile and compressive testing machine, and the linear force limiting device 100 can be connected to the tensile and compressive testing machine. The first engaging member 33 cooperates with the first recess 21 to keep the second mounting member 20 in the current position, and the second engaging member 42 and the third recess 23 can ensure the coaxiality of the second mounting member 20 and the first mounting member 10 to ensure the stability of the tensile and compressive force applied by the linear force limiting device 100.

[0082] When the tensile and compressive force of the tensile and compressive testing machine exceeds the supporting force of the first engaging member 33 on the second mounting member 20, the second mounting member 20 will squeeze the first engaging member 33 and then compress the elastic member 32 to cause the first engaging member 33 to slip off from the first recess 21. The cooperation between the first engaging member 33 and the first recess 21 is separated, and the first engaging member 33 can no longer support the second mounting member 20. The second mounting member 20 slides down or up. At this time, the sensor 60 does not correspond to the boss 24, and the boss 24 leaves the preset position. The sensor 60 detects that the boss 24 has left the preset position, and the sensor 60 can feedback the information to the controller of the tensile and compressive testing machine to control the tensile and compressive testing machine to stop. The linear force limiting device 100 can achieve automatic force relief, that is, the linear force limiting device 100 can assist the tensile and compressive testing machine to limit the tensile and compressive force during linear operation and reduce the probability of damage to the tensile and compressive testing machine.

[0083] It should be noted that after the first engaging member 33 slips off from the first recess 21, it can be manually reset. As some embodiments of the present application, as Figure 8 shown, when the second mounting member 20 slides up, a flat-blade screwdriver can be inserted between the boss 24 and the first mounting member 10 along the axial direction of the first mounting member 10 (that is, Figure 1Apply a force upward in the Z direction (as shown) to cause the first fitting 33 to fit with the first recess 21 and reset the second mounting member 20.

[0084] As some embodiments of the present application, such as Figure 9 shown, the second mounting member 20 slides down and can apply a force upward to the second mounting member 20 along the axial direction of the first mounting member 10 (i.e., Figure 1 the Z direction as shown) to cause the first fitting 33 to fit with the first recess 21 and reset the second mounting member 20.

[0085] By making the linear force limiting device 100 further include a sensor 60 and configuring the sensor 60 to be used for detecting whether the boss 24 is located at a preset position, when the linear force limiting device 100 is subjected to excessive force resulting in the second mounting member 20 sliding down or up, the sensor 60 can quickly detect and feedback information, so that the controller stops the operation of the equipment cooperating with the linear force limiting device 100, thereby being able to reduce the probability of damage to the linear force limiting device 100 and the tensile and compressive testing machine.

[0086] In some embodiments of the present utility model, such as Figure 1 、 Figure 3 、 Figures 7-9 shown, the first mounting member 10 has a first mounting portion 13 and / or the second mounting member 20 has a second mounting portion 22.

[0087] As some embodiments of the present application, the first mounting member 10 has a first mounting portion 13, the second mounting member 20 has a second mounting portion 22, and the linear force limiting device 100 can be connected to equipment such as a tensile and compressive testing machine and a manual press through the first mounting portion 13. The linear force limiting device 100 can be connected to a measurement sensor through the second mounting portion 22. The measurement sensor can be used to collect force values or other information to determine whether the equipment such as a tensile and compressive testing machine and a manual press is working properly.

[0088] As some embodiments of the present application, the first mounting member 10 has a first mounting portion 13, and the linear force limiting device 100 can be connected to a measurement sensor through the first mounting portion 13. The measurement sensor can be connected to equipment such as a tensile and compressive testing machine and a manual press. As some embodiments of the present application, the second mounting member 20 has a second mounting portion 22, and the linear force limiting device 100 can be connected to a measurement sensor through the second mounting portion 22. The measurement sensor can be connected to equipment such as a tensile and compressive testing machine and a manual press.

[0089] Such a setting can reliably connect the linear force limiting device 100 to equipment such as a tensile and compressive testing machine and a manual press and the measurement sensor, and moreover, there can be multiple connection forms, and an appropriate connection form can be selected according to actual needs, which can reduce the general assembly difficulty.

[0090] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0091] In the description of the present utility model, the "first feature" and the "second feature" may include one or more of such features.

[0092] In the description of the present utility model, the meaning of "a plurality of" is two or more.

[0093] In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0094] In the description of the present utility model, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0095] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0096] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A linear force limiting device (100), characterized in that: include: A first mounting member (10) and a second mounting member (20), wherein the first mounting member (10) defines a mounting space (11), and at least a portion of the second mounting member (20) is disposed in the mounting space (11); A force limiting assembly (30), wherein the side wall of the first mounting member (10) has a mounting hole (12) communicating with the mounting space (11), and the second mounting member (20) has a first recessed portion (21) whose wall surface is an arc surface. The force limiting assembly (30) comprises: a fixing member (31), an elastic member (32) and a first matching member (33), wherein at least a portion of the fixing member (31) is fixedly arranged in the mounting hole (12), a partial structure of the first matching member (33) is arranged in the first recessed portion (21) and the surface of the partial structure is an arc surface, and the elastic member (32) is arranged in the mounting hole (12) and is compressed between the fixing member (31) and the first matching member (33).

2. The linear force limiting device (100) according to claim 1, characterized in that: The first fitting element (33) is configured as a sphere.

3. The linear force limiting device (100) according to claim 2, characterized in that: The force-limiting assembly (30) further comprises: a ball bowl (34), wherein the ball bowl (34) is arranged between the elastic member (32) and the first matching member (33), and a second recessed portion (341) is provided on a side of the ball bowl (34) facing the first matching member (33), and a part of the structure of the first matching member (33) is arranged in the second recessed portion (341).

4. The linear force limiting device (100) according to claim 1, characterized in that: The mounting hole (12) comprises a first threaded hole (121) and a first through hole (122), and the fixing member (31) is threadably matched with the first threaded hole (121).

5. The linear force limiting device (100) according to claim 4, characterized in that: The diameter of the first threaded hole (121) is greater than the diameter of the first through hole (122).

6. The linear force limiting device (100) according to claim 1, characterized in that: Also includes: A retaining assembly (40), wherein the side wall of the first mounting member (10) has a mounting groove (14) connected to the mounting space (11), and the second mounting member (20) has a third recessed portion (23) whose wall surface is an arc surface. The retaining assembly (40) comprises: a retaining frame (41) and a second matching member (42), wherein at least a portion of the retaining frame (41) is fixed to the mounting groove (14), the second matching member (42) is arranged on the retaining frame (41), and a partial structure of the second matching member (42) is arranged in the third recessed portion (23) and the surface of the partial structure is an arc surface.

7. The linear force limiting device (100) according to claim 6, characterized in that: The second fitting element (42) is configured as a sphere.

8. The linear force limiting device (100) according to claim 7, characterized in that: The retaining frame (41) has a fourth recessed portion (411) whose wall surface is an arc surface, and a partial structure of the second matching piece (42) is arranged in the fourth recessed portion (411).

9. The linear force limiting device (100) according to any one of claims 1 to 8, characterized in that: The invention also comprises: a sensor (60); a part of the structure of the second mounting member (20) extends out of the mounting space (11) and has a boss (24); along the movement direction of the second mounting member (20), the orthographic projection of the boss (24) and the orthographic projection of the first mounting member (10) have an overlapping area; the sensor (60) is fixed to the first mounting member (10) and corresponds to the boss (24); the sensor (60) is configured to detect whether the boss (24) is located at a preset position.

10. The linear force limiting device (100) according to any one of claims 1 to 8, characterized in that: The first mounting member (10) has a first mounting portion (13) and / or the second mounting member (20) has a second mounting portion (22).

Images