Force measuring mechanism, force measuring device and elastic part preload pressure adjusting device

Abstract

The utility model discloses a force measuring mechanism, a force measuring device and an elastic member preload pressure adjustment device, wherein the force measuring mechanism includes a dynamometer, a connecting rod, a connecting seat and a connecting ball, and is connected to the dynamometer by setting a measuring assembly with a connecting ball. When contacting a part to be tested with a hollow cavity for force measurement, the connecting ball can be partially embedded in the hollow cavity and in line contact with the circumferential cavity wall of the hollow cavity, and the overall circumferential force of the part to be tested can be well transmitted to the connecting rod and then to the dynamometer through the connecting ball, so that the pressure value obtained is more accurate and the measurement accuracy is improved. The adjustment device can further drive the mounting part to rotate so that the position of the adjustment part on the mounting part is adjusted, thereby adjusting the preload pressure of the elastic member.

Description

Technical Field

[0001] The utility model relates to the field of assembly, and comprises a force measuring mechanism, a force measuring device and elastic member pre-tightening pressure adjusting equipment. Background Art

[0002] Ultrasonic scalpel is a medical device that uses ultrasonic energy to perform surgical operations. It converts electrical energy into high-frequency ultrasonic vibrations, which can cut, coagulate or vaporize tissues for various surgical procedures. This technology is generally able to reduce tissue damage, bleeding and healing time, and is widely used in many surgeries.

[0003] An ultrasonic scalpel generally consists of a knife bar and a handle. One end of the knife bar is connected to the handle, and the other end is provided with a clamp. The handle is provided with a trigger and a connecting mechanism. The connecting mechanism is used to connect the trigger and the knife bar. The user operates the trigger to further drive the connecting mechanism to move, and the connecting mechanism drives the clamp to clamp or loosen. A wave spring is usually provided on the connecting mechanism in the handle. The wave spring provides the clamping force. The wave spring is sleeved on the ferrule. A nut is installed at one end of the ferrule. The pressure on the wave spring is adjusted by adjusting the position of the nut, thereby adjusting the clamping force of the clamp.

[0004] Before installing the connection mechanism, the installation position of the nut is generally obtained by pre-calculating the relationship between the pressure of the wave spring and the position of the nut. During installation, the nut is first installed according to the predetermined installation position, where the installation position is the position of the nut relative to a certain position on the ferrule, and then a push-pull force gauge is used to measure the pressure value of the wave spring. If it does not meet the requirements, the position of the nut is adjusted according to the measurement result. At present, this installation method is complicated, and since there is no special device to measure the preload pressure of the elastic part, the use of the push-pull force gauge in an irregular manner may lead to inaccurate measurement. Therefore, each measurement is time-consuming, slow, and has low measurement accuracy. Utility Model Content

[0005] The first object of the utility model is to provide a force measuring mechanism.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a force measuring mechanism, the force measuring mechanism comprising:

[0007] Dynamometer;

[0008] A connecting rod, the connecting rod extending in the up-down direction, the upper end of the connecting rod being connected to the dynamometer;

[0009] A connecting seat, the connecting seat is fixedly arranged at the lower end of the connecting rod, the connecting seat has a receiving cavity, and the upper cavity wall of the receiving cavity is a contact surface;

[0010] A connecting ball, wherein the connecting ball can be arranged in the receiving cavity in a floating manner in an up-down direction, and at least a part of the connecting ball is exposed below the receiving cavity,

[0011] In which, the connecting ball has a first position and a second position on the connecting seat. When the connecting ball is in the first position, there is a distance between the connecting ball and the contact surface in the up and down directions; when the connecting ball is in the second position, the lower part of the connecting ball is out of contact with the connecting seat, and the connecting ball presses upward against the contact surface.

[0012] In some embodiments, the contact surface is a plane, and when the connecting ball is in the second position, the connecting ball is in point contact with the contact surface.

[0013] In some embodiments, the connecting seat comprises an upper seat body and a lower seat body connected to each other, the upper seat body has a first receiving groove with an opening facing downward, the lower seat body has a second receiving groove with an opening facing upward, and the lower portion of the lower seat body is further provided with a through hole interconnected with the second receiving groove;

[0014] The upper seat body is fixedly arranged at the lower part of the connecting rod, the upper groove wall of the first accommodating groove constitutes the contact surface, the first accommodating groove and the second accommodating groove cooperate with each other to form the accommodating cavity, and the aperture of the through hole is smaller than the diameter of the connecting ball.

[0015] In some embodiments, the upper seat body and the lower seat body are threadedly connected.

[0016] In some embodiments, a center line of the through hole extends colinearly with an axial center line of the connecting rod.

[0017] In some embodiments, the component to be tested has at least a hollow cavity, and when the connecting ball is in the second position, at least a portion of the connecting ball is located in the hollow cavity and abuts against a circumferential cavity wall of the hollow cavity.

[0018] The second object of the utility model is to provide a force measuring device.

[0019] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0020] A force measuring device, comprising:

[0021] A fixed seat, used to carry the component to be tested;

[0022] The force measuring mechanism is arranged above the fixing seat so as to be able to be lifted and lowered in the vertical direction.

[0023] Wherein, the force measuring mechanism is as described above.

[0024] In some embodiments, the force measuring device further includes a support seat and a first elastic member. The support seat can be raised and lowered relative to the fixing seat in an up and down direction. The first elastic member is configured to provide a force required for the support seat to move upward.

[0025] In some embodiments, the force measuring device further includes a lifting mechanism, which includes a lifting seat disposed on the machine base and capable of being lifted and lowered in the up and down directions, and a lifting drive assembly for driving the lifting seat to be lifted and lowered in the up and down directions, and the force measuring mechanism is mounted on the lifting seat.

[0026] In some embodiments, the lifting drive assembly includes a motor, a screw and a nut that cooperates with the screw thread, the screw extends in a vertical direction, the screw is drivingly connected to the output shaft of the motor, the lifting seat and the nut are fixedly arranged or integrally arranged, and the shell of the dynamometer is fixedly connected to the lifting seat.

[0027] In some embodiments, the force measuring device further includes a position sensor for detecting the position of the support seat, and a controller for controlling the start or stop of the lifting drive assembly, and the position sensor is communicatively connected to the controller.

[0028] In some embodiments, the fixing seat is provided with a hollow channel penetrating in the up-down direction, the supporting seat can be slidably fitted in the up-down direction through the hollow channel, and the in-position sensor is provided below the supporting seat.

[0029] The third object of the utility model is to provide a device for adjusting the preload pressure of an elastic member.

[0030] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0031] An elastic member preload pressure adjustment device is used to adjust the preload pressure of an elastic member in a connection mechanism, the connection mechanism comprises a mounting member, an elastic member, a sliding member and an adjustment member, the sliding member is slidably arranged on the mounting member, the adjustment member is threadedly connected to the mounting member, the elastic member is arranged on the mounting member along the length direction and is located between the adjustment member and the sliding member, the adjustment device comprises:

[0032] Machine base;

[0033] A fixed seat, wherein the fixed seat is provided with a limiting structure for supporting the sliding member and limiting the rotation of the sliding member;

[0034] A support seat, the support seat is arranged on the machine base in a lifting manner in the up-down direction, and the machine base is also provided with a first elastic member that provides the force required for the support seat to move upward;

[0035] A force measuring mechanism, the force measuring mechanism is as described above, the force measuring mechanism as a whole can be arranged to be lifted and lowered in the up and down direction and is located above the fixing seat;

[0036] The adjusting mechanism is arranged on the machine base and is used for driving the adjusting member to rotate relative to the mounting member.

[0037] In some embodiments, the adjustment mechanism includes a driving gear and a driven gear that can mesh with each other, and a driving assembly for driving the driving gear to rotate, wherein the axis lines of the driving gear and the driven gear extend in the up and down directions, the driving gear is rotatably arranged on the base, and the driven gear can be detachably mounted on the outer periphery of the adjustment member and drive the adjustment member to rotate synchronously when rotating.

[0038] In some embodiments, the driving assembly includes a driving wheel, a driven wheel, a synchronous belt tensioned between the driving wheel and the driven wheel, and a driving member driving the driving wheel to rotate, wherein the driven wheel is coaxially and fixedly connected to the driving gear.

[0039] In some embodiments, the drive assembly includes at least a drive motor, the output shaft of the drive motor can rotate forward or reversely, and the adjustment device also includes a motor reset sensor for detecting the rotation angle of the output shaft, and the motor reset sensor is communicatively connected to the drive motor.

[0040] In some embodiments, the cross section of the adjusting member is polygonal, the driven gear has a mounting hole extending axially therethrough, and the driven gear can be fittedly sleeved on the outer peripheral portion of the adjusting member.

[0041] In some embodiments, the adjustment device also includes a lifting mechanism for driving the force measuring mechanism as a whole to rise and fall in the up and down directions, the lifting mechanism includes a lifting seat that can be lifted and lowered in the up and down directions on the base, a lifting drive component for driving the lifting seat to rise and fall in the up and down directions, and a controller for controlling the start or stop of the lifting drive component, and a position sensor for detecting the position of the support seat is provided on the base, and the position sensor is communicatively connected to the controller.

[0042] In some embodiments, the lifting drive assembly includes a motor, a screw and a nut that cooperates with the screw thread, the screw extends in a vertical direction, the screw is drivingly connected to the output shaft of the motor, the lifting seat and the nut are fixedly arranged or integrally arranged, and the shell of the dynamometer in the force measuring mechanism is fixedly connected to the lifting seat.

[0043] In some embodiments, the fixing seat is provided with a hollow channel penetrating in the up-down direction, the supporting seat can be slidably fitted in the up-down direction through the hollow channel, and the in-position sensor is provided below the supporting seat.

[0044] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0045] The utility model provides a force measuring mechanism, in which a measuring component having a connecting ball is provided and connected to a dynamometer. When contacting with a component to be tested having a hollow cavity for force measurement, the connecting ball can be partially embedded in the hollow cavity and make linear contact with the circumferential cavity wall of the hollow cavity. The overall circumferential force of the component to be tested can be well transmitted through the connecting ball to the connecting rod and then to the dynamometer, so that the obtained pressure value is more accurate, thereby improving the measurement accuracy.

[0046] The force measuring device provided by the utility model includes all the technical features of the above force measuring mechanism, and thus has corresponding technical effects. Furthermore, the force measuring device can measure the preload pressure of the elastic member in the connecting mechanism, and the measuring operation is convenient.

[0047] The elastic member preload pressure adjustment device provided by the utility model includes all the technical features of the above-mentioned force measuring mechanism, and therefore also has corresponding technical effects. The adjustment device can also drive the mounting member to rotate so that the position of the adjustment member on the mounting member is adjusted, thereby adjusting the preload pressure of the elastic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Attached Figure 1 This is a schematic diagram of the overall structure of the connection mechanism targeted by the adjustment device of one embodiment of the utility model;

[0049] Attached Figure 2 For attachment Figure 1 A schematic diagram of the structure of the mounting member in the connecting mechanism;

[0050] Attached Figure 3 For attachment Figure 1 A schematic diagram of the structure of a sliding member in a connecting mechanism;

[0051] Attached Figure 4 This is a schematic diagram of the overall structure of an adjustment device according to an embodiment of the utility model;

[0052] Attached Figure 5 For attachment Figure 4 Schematic diagram of the internal structure of the adjustment device Figure 1 ;

[0053] Attached Figure 6 For attachment Figure 4 Schematic diagram of the internal structure of the adjustment device Figure 2 ;

[0054] Attached Figure 7 For attachment Figure 6 A schematic diagram of the front structure of the adjustment device;

[0055] Attached Figure 8 For the attachment Figure 7 AA-direction cross-sectional structural diagram;

[0056] Attached Fig. 9 For attachment Figure 6 A schematic diagram of the structural breakdown of some structures in the adjustment device;

[0057] Attached Fig.10 For attachment Figure 6 A schematic diagram of the internal structure of the measuring assembly in the adjustment device, wherein the connecting ball is in a first position;

[0058] Attached Fig.11 For attachment Figure 6 A schematic diagram of the internal structure of the measuring assembly in the adjustment device, wherein the connecting ball is in the second position;

[0059] Wherein: 100, connecting mechanism; 10, mounting member; 101, first cylinder; 102, second cylinder; 103, limiting platform; 103a, limiting surface; 20, elastic member (wave spring); 30, adjusting member (nut); 40, sliding member; 401, sliding sleeve; 402, connecting member; 403, boss;

[0060] 1. Machine base;

[0061] 2. force measuring mechanism; 21. dynamometer; 22. connecting rod; 23. connecting seat; 231. upper seat body; 231a. first receiving groove; 231b. contact surface; 232. lower seat body; 232a. second receiving groove; 232b. through hole; 24. connecting ball;

[0062] 3. Lifting mechanism; 31. Motor; 32. Screw; 33. Lifting seat;

[0063] 4. Adjustment mechanism; 41. Driving gear; 42. Driven gear; 43. Driven wheel; 44. Driving wheel; 45. Synchronous belt; 46. Driving motor; 461. Output shaft;

[0064] 5. Fixing seat; 51. Limiting hole; 52. Limiting groove; 6. Mounting table; 7. Supporting seat; 8. First elastic member; 9. Emergency stop switch; 11. In-position sensor; 12. Casing. DETAILED DESCRIPTION

[0065] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, so that the advantages and features of the utility model can be more easily understood by those skilled in the art. Obviously, the embodiments described in this application are only part of the embodiments of the application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0066] It should be stated that the following descriptions of directions such as front, back, left, right, up, and down are all defined with reference to the directions observed by the operator when using the adjustment device. The definitions of the above directions are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0067] See also Figures 1 to 3 A connecting mechanism 100 is shown, which is a processing object targeted by a test and adjustment device of an embodiment of the present invention. The connecting mechanism 100 includes a mounting member 10, an elastic member 20, a sliding member 40 and an adjusting member 30. The sliding member 40 is slidably disposed on the mounting member 10, the adjusting member 30 is threadedly connected to the mounting member 10, and the elastic member 20 is disposed on the mounting member 10 along the length direction and is located between the adjusting member 30 and the sliding member 40.

[0068] Here, a limit platform 103 is provided on the mounting member 10, and the limit platform 103 is used to limit the sliding position of the sliding member 40 on the mounting member 10. Under the action of the elastic member 20, the sliding member 40 abuts against the limit platform 103; when the sliding member 40 is driven to move toward the adjusting member 30, the elastic member 20 can be squeezed. The installation position of the adjusting member 30 on the mounting member 10, that is, the spacing between the adjusting member 30 and the limit platform 103 is adjusted, so that when no external force is applied, the elastic member 20 is squeezed between the sliding member 40 and the adjusting member 30 to have different lengths, thereby having different preload pressures.

[0069] The connection mechanism 100 shown in this embodiment is specifically used in an ultrasonic scalpel, and is used for connecting the ultrasonic scalpel handle and the tool. In the connection mechanism 100, the elastic member 20 is specifically a wave spring, and the mounting member 10 is in the shape of a hollow cylinder, which has a hollow cavity running through the axial direction. The mounting member 10 includes a first cylinder 101 and a second cylinder 102 connected along the length direction, and a limit table 103 separates the first cylinder 101 and the second cylinder 102. The first cylinder 101 is used to install a sliding member 40, an elastic member 20 and an adjusting member 30, and the second cylinder 102 is used to connect the tool. An external thread is provided on the end of the first cylinder 101 away from the limit table 103, and the adjusting member 30 is specifically a nut, and the adjusting member 30 is screwed on the external thread of the first cylinder 101. By changing the position of its screwing, the position of the adjusting member 30 on the mounting member 10 is adjusted.

[0070] In the connection mechanism 100 of this embodiment, the sliding member 40 specifically includes a sliding sleeve portion 401 and a connecting portion 402. The sliding sleeve portion 401 is slidably mounted on the first cylinder 101, one end of which is against the limiting platform 103 and the other end is against the elastic member 20. The connecting portion 402 and the sliding sleeve portion 401 are arranged in an L shape. The connecting portion 402 is used to be connected to the operating handle on the ultrasonic surgical knife handle through a connecting assembly, so that the sliding member 40 can be driven to slide on the mounting member 10 to squeeze the elastic member 20 by operating the operating handle. A limiting structure for limiting the relative rotation between the sliding sleeve portion 401 and the mounting member 10 is provided between the sliding sleeve portion 401 and the mounting member 10. Specifically, two lugs 403 are also provided on the sliding sleeve portion 401, and two limiting surfaces 103a are correspondingly provided on the limiting platform 103. The two lugs 403 are located outside the two limiting surfaces 103a, and are used to limit the relative rotation between the sliding member 40 and the mounting member 10.

[0071] See also Figures 4 to 11 An elastic member preload pressure adjustment device is shown, the adjustment device comprising:

[0072] Base 1;

[0073] A fixed seat 5, on which a limiting structure for supporting the sliding member 40 and limiting the rotation of the sliding member 40 is provided;

[0074] A support seat 7, which is arranged on the machine base 1 so as to be able to be lifted and lowered in the up-and-down direction. The machine base 1 is also provided with a first elastic member 8 that provides a force required for the upward movement of the support seat 7;

[0075] The force measuring mechanism 2 includes a dynamometer 21 and a measuring assembly connected to the dynamometer 21. The measuring assembly extends in the up-down direction and is located above the fixing seat 5. The force measuring mechanism 2 as a whole can be raised and lowered in the up-down direction so that the measuring assembly can cooperate with the part to be tested in the connecting mechanism 100 to perform a pressure test.

[0076] The adjusting mechanism 4 includes a driving gear 41 and a driven gear 42 that can mesh with each other, and a driving assembly for driving the driving gear 41 to rotate, wherein the axis lines of the driving gear 41 and the driven gear 42 extend in the up-down direction, the driving gear 41 is rotatably arranged on the base 1, and the driven gear 42 can be detachably mounted on the outer periphery of the adjusting member 30, and can drive the adjusting member 30 to rotate synchronously when rotating.

[0077] When using the adjustment device, after measuring the pressure of the elastic member 20 in the connection mechanism 100 through the cooperation of the force measuring mechanism 2 with the support seat 7 and the fixing seat 5, if the pressure value does not reach the preset pressure value, the driving gear 41 is driven to rotate through the driving assembly, driving the driven gear 42 to rotate, and the driven gear 42 drives the adjustment member 30 to rotate synchronously, so that the adjustment member 30 rotates clockwise or counterclockwise on the mounting member 10 to adjust the installation position on the mounting member 10, so that the preload pressure of the elastic member 20 changes. After the adjustment is completed, the pressure of the elastic member 20 is measured again until its pressure value reaches the preset range, and the driven gear 42 is removed from the adjustment member 30 to obtain the adjusted connection mechanism 100.

[0078] See also Figures 4 to 11 As shown, in the pressure testing device of this embodiment, each part is specifically arranged in the following manner:

[0079] In force measuring mechanism 2:

[0080] The measuring assembly includes a connecting rod 22, a connecting seat 23 and a connecting ball 24, wherein the connecting rod 22 extends in the up-down direction, and the upper end of the connecting rod 22 is connected to the dynamometer 21; the connecting seat 23 is fixedly arranged at the lower end of the connecting rod 22, and a receiving cavity is arranged on the connecting seat 23, and the upper cavity wall of the receiving cavity is a contact surface 231b; the connecting ball 24 can be floatingly accommodated in the receiving cavity of the connecting seat 23 in the up-down direction, and the lower part of the connecting ball 24 is at least partially exposed below the receiving cavity.

[0081] The connecting ball 24 has a first position and a second position on the connecting seat 23. When the connecting ball 24 is in the first position, the connecting ball 24 has a distance from the contact surface 231b in the vertical direction under the action of its own gravity. Fig.10 When the connecting ball 24 is in the second position, the connecting ball 24 moves upward under the support of the component to be tested below, and the connecting ball 24 and the contact surface 231b abut against each other, as shown Fig.11 As shown, the force on the bottom component is transmitted to the force measuring end 221 through the connecting ball 24, and then the corresponding force value is obtained by the dynamometer 21.

[0082] In this embodiment, the contact surface 231b is a plane, and when the connecting ball 24 is in the second position, the connecting ball 24 and the contact surface 231b are in point contact. When the connecting ball 24 is in the second position, the connecting ball 24 abuts against the upper part of the mounting member 10, wherein at least a portion of the lower part of the connecting ball 24 is inserted from top to bottom into the hollow cavity of the mounting member 10, so that the connecting ball 24 and the mounting member 10 are in contact and in line contact at 360°, and the connecting ball 24 does not contact the connecting seat 23, so that the mounting member 10 is subjected to a downward force at the same time at 360°, thereby avoiding measurement errors. In this way, by adopting the measuring component with the connecting ball 24, the downward pressure of the dynamometer 21 can act on any point of the circular tube-shaped mounting component 10 at the same time, through the line contact between the connecting ball 24 and the circumferential cavity wall of the cavity in the mounting component 10, and then through the point contact between the connecting ball 24 and the contact surface 24, the overall circumferential force of the mounting component 10 can be well transmitted to the connecting rod 22 and then to the dynamometer 21 through the connecting ball 24, and the measured pressure value is more accurate.

[0083] In this embodiment, the connecting ball 24 is specifically arranged in the connecting seat 23 according to the following structure: the connecting seat 23 includes an upper seat body 231 and a lower seat body 232 that are connected to each other, the upper seat body 231 has a first accommodating groove 231a opening downward, and the upper groove wall of the first accommodating groove 231a is a contact surface 231b; the lower seat body 232 has a second accommodating groove 232a opening upward, and its lower part is also provided with a through hole 232b connected to the second accommodating groove 232a, and the aperture of the through hole 232b is smaller than the diameter of the connecting ball 24.

[0084] The upper seat body 231 is threadedly connected or fixedly connected to the lower end of the connecting rod 22 by other means or is directly integrated with the connecting rod 22; the connecting ball 24 is placed in the lower seat body 232 and the lower seat body 232 is threadedly connected to the lower part of the upper seat body 231, and the first accommodating groove 231a and the second accommodating groove 232a cooperate with each other in the up and down directions to form a receiving cavity of the connecting seat 23, and the connecting ball 24 is received in the receiving cavity and at least a part of its lower part can be exposed downward from the through hole 232b, and its upper part can contact with the contact surface 231b when moving upward.

[0085] The adjustment device also includes a lifting mechanism 3, which is used to drive the force measuring mechanism 2 to lift up and down as a whole. The lifting mechanism 3 includes a lifting seat 33 that can be lifted up and down on the base 1, a lifting drive assembly for driving the lifting seat 33 to lift up and down, and a controller (not shown in the figure) for controlling the start or stop of the lifting drive assembly. The base 1 is also provided with an in-position sensor 10 for detecting the position of the support seat 7, and the in-position sensor 10 is connected to the above-mentioned controller in communication. The position of the support seat 7 is detected by the in-position sensor 10, and the working stroke of the force measuring mechanism 2 is controlled, which makes the measurement result more accurate than manual measurement.

[0086] Here, the lifting drive assembly includes a motor 31, a screw 32 and a nut threadedly matched with the screw 32, the screw 32 extends in the vertical direction, the screw 32 is drivingly connected to the output shaft of the motor 31, the lifting seat 33 is fixedly arranged or integrally arranged with the above-mentioned nut, and the shell of the dynamometer 21 is fixedly connected to the lifting seat 33.

[0087] The fixed seat 5 is provided with a hollow passage running through in the up-down direction, the support seat 7 can be slidably arranged in the hollow passage in the up-down direction, and the in-place sensor 10 is arranged below the support seat 7. Here, the machine base 1 is also fixedly provided with a mounting platform 6, which is arranged below the fixed seat 5 and fixed to the fixed seat 5. The in-place sensor 10 is arranged on the mounting platform 6, and the upper end of the in-place sensor 10 is the detection end. When the support seat 7 is pressed downward against the in-place sensor 10, it indicates that the support seat 7 has dropped to the preset position. At this time, a signal is sent to the controller, and the motor 31 stops working after receiving the signal, so that the force measuring mechanism 2 stops moving downward as a whole. At this time, the force value displayed on the dynamometer 21 is the preload pressure value of the elastic member 20 in the connecting mechanism 100.

[0088] See also Fig. 9 As shown, in this embodiment, the fixed seat 5 is L-shaped, and has a horizontal seat and a vertical seat. The horizontal seat has a hollow channel, and the upper part has a limiting hole 51, which is used to limit the sliding sleeve 401 of the sliding member 40; the vertical seat is provided with a limiting groove 52, which is used to correspond to the connecting portion 402 of the accommodating sliding member 40. The limiting hole 51 and the limiting groove 52 cooperate with each other to form a limit for the sliding member 40 in this embodiment, limiting the downward movement and relative rotation of the sliding member 40 relative to the fixed seat 5. Of course, in other embodiments, if the structure of the sliding member in the connection mechanism to be tested and adjusted is different, the limiting structure of the fixed seat 5 can be adjusted accordingly.

[0089] In the connection mechanism 100 of the present embodiment, a hollow cavity is further provided on the support seat 7 for the second cylinder 102 to be inserted in a sliding manner, while the limit platform 103 cannot enter the hollow cavity. A plurality of pin holes distributed at intervals along the circumferential direction are also provided on the upper part of the support seat 7 to correspond to the installation of a plurality of support pins for circumferentially supporting below the limit platform 103 to adapt to the structural requirements of each component in the connection mechanism 100 and the matching requirements of the support seat 7.

[0090] The force measuring mechanism 2 , the lifting mechanism 3 , the fixing seat 5 , the supporting seat 7 , etc. together constitute a force measuring device for measuring the preload pressure of the elastic member 20 in the connecting mechanism 100 .

[0091] In the adjustment mechanism 4, the driving assembly includes a driving wheel 44, a driven wheel 43, a synchronous belt 45 tensioned between the driving wheel 44 and the driven wheel 43, and a driving member that drives the driving wheel 44 to rotate. The driven wheel 43 is coaxially and fixedly connected to the driving gear 41. The driving member used here is a driving motor 46. The driving motor 46 can rotate forward or reverse to drive the driving wheel 44 to rotate, and the driven wheel 43 is driven to rotate through the synchronous belt 45, so that the driving gear 41 rotates synchronously, thereby driving the driven gear 42 to rotate so that the adjustment member 30 can rotate relative to the mounting member 10 to adjust its screwing position on the mounting member 10.

[0092] The adjustment device further includes a motor reset sensor (not shown in the figure) for detecting the rotation angle of the output shaft of the drive motor 46 , and the motor reset sensor is in communication connection with the drive motor 46 .

[0093] After the force measuring mechanism 2 is tested, the drive motor 46 works to drive the adjusting member 30 to rotate and completes the position adjustment on the mounting member 10. The drive motor 46 rotates in the opposite direction by a corresponding angle according to the rotation angle of the output shaft of the drive motor 46 detected by the motor reset sensor during the process, so that the drive motor 46 is reset, so that the number of rotations of the adjusting member 30 can be controlled according to the rotation angle of the drive motor 46 after the workpiece is replaced, thereby accurately adjusting the adjusting member 30 to the mounting member 10.

[0094] In the specific configuration, the cross section of the adjusting member 30 is polygonal, and the driven gear 42 has a mounting hole that penetrates along the axial direction. The driven gear 42 can be fitted on the outer peripheral portion of the adjusting member 30, so that the adjusting member 30 can be driven to rotate synchronously when rotating. Here, the adjusting member 30 is a nut, and its cross section is hexagonal. Accordingly, the mounting hole on the driven gear 42 is also a hexagonal hole, and the driven gear 42 plays a role similar to a wrench here.

[0095] In the adjustment device, an emergency stop switch 9 is also provided on the machine base 1, which is used to stop the operation of the lifting mechanism 3 or the adjustment mechanism 4 in time when necessary; the machine base 1 is also provided with a detector for detecting whether there is a workpiece on the fixed seat 5, that is, detecting whether there is a connecting mechanism 100. When it is detected that there is no workpiece, the lifting mechanism 3 and the adjustment mechanism 4 do not work.

[0096] When the adjustment device of this embodiment is used to adjust the preload pressure of the elastic member 20 in the connection mechanism 100, the following steps can be specifically followed:

[0097] The preliminarily assembled connection mechanism 100 is placed on the fixing seat 5, so that the sleeve portion 401 of the sliding member 40 is located in the limiting hole 51 and the connection portion 402 is located in the limiting groove 52, so that the sliding member 40 is fixed relative to the fixing seat 5. At this time, the mounting member 10 extends in the up-down direction and its lower portion is supported on the supporting seat 7.

[0098] The motor 31 of the lifting drive assembly works, driving the force measuring mechanism 2 to move downward as a whole, and the connecting ball 24 first contacts the top of the mounting member 10. As the force measuring mechanism 2 moves downward, the connecting ball 24 switches from the second position to the first position; the force measuring mechanism 2 continues to be driven downward, and the mounting member 10 is pushed downward, and the support seat 7 overcomes the force of the first elastic member 8 and continues to move downward, until the in-position sensor 11 is triggered, the motor 31 stops working, and the force measuring mechanism 2 does not move downward any more;

[0099] The pressure value displayed on the dynamometer 21 at this time is read, which is the preload pressure of the elastic member 20 in the current state;

[0100] The lifting drive assembly is reset upward, so that the force measuring mechanism 2 is separated from the mounting member 10; the support seat 7 is reset upward, and the mounting member 10 is also reset to keep matching with the sliding member 40 and limit each other in the circumferential direction;

[0101] If the pressure value is not within the preset range, the driven gear 42 is sleeved onto the adjusting member 30, and the adjusting mechanism 4 operates to rotate the driven gear 42, driving the adjusting member 30 to rotate (forward or reverse) to adjust the position on the mounting member 10;

[0102] After the adjustment is completed, the force measuring mechanism 2 is used for measurement again. If the pressure value obtained by the measurement is still not within the preset range, the adjustment is continued; if the pressure value obtained by the measurement is within the preset range, the driven gear 42 is removed from the adjustment member 30, and the connecting mechanism 100 is taken out to obtain the adjusted connecting mechanism 100.

[0103] In some embodiments, to facilitate adjustment operations, the connecting mechanism 100 reserves a certain installation margin for the adjustment member 30 during initial assembly. In this way, when using the adjustment device for adjustment, it is only necessary to allow the drive motor 46 of the adjustment mechanism 4 to rotate in a single direction a preset small number of circles after each test. Generally, after 2 to 3 measurements and adjustments, the adjustment member 30 can be adjusted to a suitable position, and the preload pressure of the elastic member 20 can be adjusted to a preset range, which is more convenient in control and operation.

[0104] In addition, the adjustment device also includes a control system (not shown in the figure), and a casing 12 is also provided on the base 1. The area of ​​the device that does not require operation is covered inside the casing 12. A display screen (not shown in the figure) is also provided on the casing 12. The display screen is communicated with the control system and is used to display instructions issued by the control system to instruct the operator to operate according to the instructions. This makes it more convenient to operate the adjustment device, has low requirements on the operator, is less prone to errors, and ensures the qualified rate of the installation of the connecting mechanism 100.

[0105] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A force measuring mechanism, characterized in that: The force measuring mechanism comprises: Dynamometer; A connecting rod, the connecting rod extending in the up-down direction, the upper end of the connecting rod being connected to the dynamometer; A connecting seat, the connecting seat is fixedly arranged at the lower end of the connecting rod, the connecting seat has a receiving cavity, and the upper cavity wall of the receiving cavity is a contact surface; A connecting ball, wherein the connecting ball can be arranged in the receiving cavity in a floating manner in an up-down direction, and at least a part of the connecting ball is exposed below the receiving cavity, In which, the connecting ball has a first position and a second position on the connecting seat. When the connecting ball is in the first position, there is a distance between the connecting ball and the contact surface in the up and down directions; when the connecting ball is in the second position, the lower part of the connecting ball is out of contact with the connecting seat, and the connecting ball presses upward against the contact surface.

2. The force measuring mechanism according to claim 1, characterized in that: The contact surface is a plane, and when the connecting ball is in the second position, the connecting ball and the contact surface are in point contact.

3. The force measuring mechanism according to claim 1, characterized in that: The connecting seat comprises an upper seat body and a lower seat body connected to each other, the upper seat body has a first receiving groove with an opening facing downward, the lower seat body has a second receiving groove with an opening facing upward, and the lower part of the lower seat body is also provided with a through hole interconnected with the second receiving groove; The upper seat body is fixedly arranged at the lower part of the connecting rod, the upper groove wall of the first accommodating groove constitutes the contact surface, the first accommodating groove and the second accommodating groove cooperate with each other to form the accommodating cavity, and the aperture of the through hole is smaller than the diameter of the connecting ball.

4. The force measuring mechanism according to claim 3, characterized in that: The upper seat body and the lower seat body are threadedly connected; and / or the center line of the through hole extends colinearly with the axial center line of the connecting rod.

5. The force measuring mechanism according to claim 1, characterized in that: The component to be tested has at least a hollow cavity. When the connecting ball is in the second position, at least a portion of the connecting ball is located in the hollow cavity and abuts against a circumferential cavity wall of the hollow cavity.

6. A force measuring device, characterized in that: include: A fixed seat, used to carry the component to be tested; The force measuring mechanism is arranged above the fixing seat so as to be able to be lifted and lowered in the vertical direction. Wherein, the force measuring mechanism is as described in any one of claims 1 to 5.

7. The force measuring device according to claim 6, characterized in that: The force measuring device further includes a support seat and a first elastic member. The support seat can be raised and lowered relative to the fixed seat in the up-and-down direction. The first elastic member is configured to provide a force required for the support seat to move upward. The force measuring device further includes a lifting mechanism. The lifting mechanism includes a lifting seat that can be raised and lowered on a machine base in the up-and-down direction, and a lifting drive assembly for driving the lifting seat to be raised and lowered in the up-and-down direction. The force measuring mechanism is mounted on the lifting seat.

8. The force measuring device according to claim 7, characterized in that: The lifting drive assembly includes a motor, a screw and a nut that cooperates with the screw thread. The screw extends in a vertical direction and is drivingly connected to the output shaft of the motor. The lifting seat and the nut are fixedly arranged or integrally arranged. The shell of the dynamometer is fixedly connected to the lifting seat.

9. The force measuring device according to claim 7, characterized in that: The force measuring device further comprises an in-place sensor for detecting the position of the support seat, and a controller for controlling the start or stop of the lifting drive assembly, wherein the in-place sensor is in communication connection with the controller; The fixing seat is provided with a hollow channel penetrating in the up-down direction, the supporting seat can be slidably fitted in the up-down direction and penetrated in the hollow channel, and the in-position sensor is arranged below the supporting seat.

10. An elastic member preload pressure adjustment device, used for adjusting the preload pressure of an elastic member in a connection mechanism, the connection mechanism comprising a mounting member, an elastic member, a sliding member and an adjusting member, the sliding member being slidably arranged on the mounting member, the adjusting member being threadedly connected to the mounting member, the elastic member being arranged on the mounting member along the length direction and being located between the adjusting member and the sliding member, characterized in that: The adjustment device comprises: Machine base; A fixed seat, wherein the fixed seat is provided with a limiting structure for supporting the sliding member and limiting the rotation of the sliding member; A support seat, the support seat is arranged on the machine base in a lifting manner in the up-down direction, and the machine base is also provided with a first elastic member that provides the force required for the support seat to move upward; A force measuring mechanism, wherein the force measuring mechanism is as described in any one of claims 1 to 5, wherein the force measuring mechanism as a whole can be raised and lowered in the up and down direction and is located above the fixing seat; The adjusting mechanism is arranged on the machine base and is used for driving the adjusting member to rotate relative to the mounting member.

11. The elastic member preload pressure adjustment device according to claim 10, characterized in that: The adjustment mechanism includes a driving gear and a driven gear that can mesh with each other, and a driving assembly for driving the driving gear to rotate, wherein the axis lines of the driving gear and the driven gear extend in the up-down direction, the driving gear is rotatably arranged on the base, and the driven gear can be detachably sleeved on the outer periphery of the adjustment member and drive the adjustment member to rotate synchronously when rotating.

12. The elastic member preload pressure adjustment device according to claim 11, characterized in that: The driving assembly includes a driving wheel, a driven wheel, a synchronous belt tensioned between the driving wheel and the driven wheel, and a driving member driving the driving wheel to rotate, wherein the driven wheel is coaxially and fixedly connected to the driving gear; And / or, the cross section of the adjusting member is polygonal, the driven gear has a mounting hole penetrating along the axial direction, and the driven gear can be fittedly sleeved on the outer peripheral portion of the adjusting member.

13. The elastic member preload pressure adjustment device according to claim 11, characterized in that: The driving assembly at least includes a driving motor, the output shaft of the driving motor can rotate forward or reversely, and the adjustment device also includes a motor reset sensor for detecting the rotation angle of the output shaft, and the motor reset sensor is communicatively connected to the driving motor.

14. The elastic member preload pressure adjustment device according to claim 10, characterized in that: The adjustment device also includes a lifting mechanism for driving the force measuring mechanism as a whole to rise and fall in the up and down directions. The lifting mechanism includes a lifting seat that can be lifted and lowered in the up and down directions on the machine base, a lifting drive component for driving the lifting seat to rise and fall in the up and down directions, and a controller for controlling the start or stop of the lifting drive component. The machine base is provided with an in-position sensor for detecting the position of the support seat, and the in-position sensor is communicatively connected with the controller.

15. The elastic member preload pressure adjustment device according to claim 14, characterized in that: The lifting drive assembly includes a motor, a screw and a nut threadedly matched with the screw, the screw extends in a vertical direction, the screw is drivingly connected to the output shaft of the motor, the lifting seat and the nut are fixedly arranged or integrally arranged, the shell of the dynamometer in the force measuring mechanism is fixedly connected to the lifting seat; and / or, a hollow channel penetrating in the up-down direction is provided on the fixed seat, the support seat can be slidably fitted in the up-down direction and penetrated into the hollow channel, and the in-position sensor is arranged below the support seat.

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