Bendable screwdriver with sensor

Abstract

The utility model relates to a kind of elbow electric screwdriver with sensor, the elbow electric screwdriver with sensor includes shell device, main shaft device, output connector and torsion sensor.The shell device includes shell, the lower cover of being set to the one end of shell, the flange seat being connected between shell and lower cover, the first movable piece being movably set between shell and the one end of flange seat and the second movable piece being movably set between the other end of flange seat, the end surface between shell, lower cover.Main shaft device is set in shell, and the output shaft of main shaft device is connected to output connector by being passed through lower cover.Torsion sensor is fixed on the output shaft of main shaft device.The first movable piece is arranged between shell and flange seat, and the second movable piece is movably connected between the adhering surface of flange seat and lower cover, to make the end surface between shell and flange seat and the flange seat and lower cover adopt the mode of movable connection of sliding contact to reduce frictional resistance, to improve the detection accuracy of torsion sensor.

Description

Technical Field

[0001] This utility model relates to the field of power tool switching equipment, and in particular to a bend screwdriver with a sensor. Background Technology

[0002] An electric screwdriver, also known as an electric screwdriver or electric screwdriver, is a power tool used for tightening and loosening screws and nuts, and is an indispensable tool in the assembly industry. Current electric screwdrivers generally determine whether a screw is tightened properly by detecting its torque; that is, the screwdriver automatically stops when the set torque is reached. In traditional electric screwdrivers, the torque sensor is usually located on the motor spindle. During use, friction is generated between the screwdriver's handle and the flange seat due to the rotation of the motor spindle, which affects the torque sensor's measurement of the motor's current torque value, resulting in lower measurement accuracy. Therefore, it is necessary to provide a bend screwdriver with a sensor to solve the above problems. Utility Model Content

[0003] This utility model relates to an electric screwdriver with a sensor. The electric screwdriver with a sensor uses a first movable member between the outer shell and the flange seat, and a second movable member between the mating surfaces of the flange seat and the lower cover for movable connection. This allows for sliding contact between the end face of the outer shell and the flange seat, and between the flange seat and the lower cover, reducing frictional resistance and improving the detection accuracy of the torque sensor. This, in turn, improves the work efficiency, installation accuracy, and installation quality of using this utility model, solving the problem in the prior art where surface friction between the handle and the flange seat leads to low detection accuracy of the torque sensor.

[0004] To solve the above problems, the present invention provides: a bent electric screwdriver with a sensor, comprising: The housing device includes an outer shell, a lower cover disposed at one end of the outer shell, a flange seat connected between the outer shell and the lower cover, a first movable member movably disposed between the outer shell and one end of the flange seat, and a plurality of second movable members movably disposed between the other end of the flange seat, the end faces of the outer shell and the lower cover; the first movable member is a needle roller structure, and the second movable members are steel ball structures; The spindle assembly is housed within the housing. An output connector is disposed within the lower cover, and the output shaft of the main spindle device passes through the lower cover and connects to the output connector; and... A torque sensor is fixed to the output shaft of the spindle assembly.

[0005] Furthermore, several first movable components are provided. A plurality of first grooves are spaced apart on the circumferential side of one end of the flange seat facing the inner wall of the housing. At least one first movable component is disposed within each first groove, and the side of the first movable component protrudes from the first groove to fit against the inner wall of the housing. The spaced-apart arrangement of one end of the flange seat with the inner wall of the housing reduces the frictional resistance between the housing and the flange seat, improving the accuracy of torque detection.

[0006] Furthermore, the central axis of the first movable component is aligned with the length direction of the output shaft of the main spindle device, thereby increasing the load-bearing capacity of the first movable component and extending its service life.

[0007] Furthermore, several second movable parts are provided. Several second grooves are spaced apart on the circumference of the other end of the flange seat, and each second groove contains a second movable part. The circumference of the second movable part protrudes from the second groove to simultaneously abut against the inner wall of the outer casing and the end face of the lower cover, thereby simultaneously reducing the frictional resistance between the flange seat and the inner wall of the outer casing and the end face of the lower cover, and improving the accuracy of the detection.

[0008] Furthermore, each of the second grooves contains at least two second movable members, and multiple second movable members are arranged side by side along the length direction of the second groove, which is aligned with the length direction of the output shaft of the main shaft device. The more steel balls there are, the lower the pressure borne by each individual steel ball, and the higher its compressive strength.

[0009] Furthermore, four mounting positions are evenly spaced on the circumferential side of the other end of the flange seat, and each mounting position has at least two second grooves spaced apart. The distance between two adjacent mounting positions is greater than the distance between two adjacent second grooves in each mounting position, making processing easier and saving costs.

[0010] Furthermore, the housing assembly also includes a sliding sleeve and a friction plate. The sliding sleeve is disposed between the inner sidewall of the housing and the second movable component. The friction plate is fitted between the end face of the lower cover and the second movable component, improving wear resistance and extending service life.

[0011] Furthermore, the spindle assembly includes a motor, a spindle, and a heat insulation component. The motor is connected to the spindle, and the heat insulation component is mounted on the output shaft of the spindle. The heat insulation component is sandwiched between the end of the motor and the end face of the flange seat. The heat insulation component is made of a material with low thermal conductivity, which can prevent rapid heat transfer, thereby eliminating the influence of the heat generated by the motor on the torque sensor and improving the detection accuracy.

[0012] Furthermore, the motor end is provided with multiple positioning holes at intervals. The heat insulation component is configured as a ring structure, and multiple through positioning grooves are spaced apart along its circumference. The length direction of the positioning grooves is the same as the direction of the main shaft. Each positioning groove corresponds to one positioning hole, and the heat insulation component is fixed in the positioning hole by one end of a positioning stud passing through the positioning groove, thereby improving installation efficiency and accuracy.

[0013] Furthermore, the flange seat has a mounting groove at the end facing the motor, and the heat insulation component at the end facing away from the motor is inserted into the mounting groove. The flange seat has multiple first mounting holes along its axial direction, and the heat insulation component has correspondingly multiple second mounting holes, all of which are offset from the positioning groove. The flange seat is simultaneously threaded to the first and second mounting holes by screws to fix the flange seat and the heat insulation component, resulting in a compact structure and higher stability.

[0014] This utility model, by employing the aforementioned sensor-equipped elbow electric screwdriver, offers the following advantages compared to existing technologies: This utility model relates to a sensor-equipped elbow electric screwdriver, which includes a housing, a spindle assembly, an output connector, and a torque sensor. The housing assembly includes an outer shell, a lower cover disposed at one end of the outer shell, a flange seat connected between the outer shell and the lower cover, a first movable member movably disposed between the outer shell and one end of the flange seat, and a second movable member movably disposed between the other end of the flange seat, the end faces of the outer shell, and the lower cover. The spindle assembly is disposed within the outer shell, and the output connector is disposed within the lower cover. The output shaft of the spindle assembly passes through the lower cover and connects to the output connector. The torque sensor is fixed to the output shaft of the spindle assembly. A first movable member is provided between the outer shell and the flange seat, and a second movable member is provided between the mating surfaces of the flange seat and the lower cover for movable connection. This allows the end face of the outer shell to slide against the flange seat and the flange seat to slide against the lower cover, thereby reducing frictional resistance and improving the detection accuracy of the torque sensor. This, in turn, can improve the work efficiency, installation accuracy, and installation quality of this invention. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0016] Figure 1 This is a schematic diagram of one embodiment of the sensor-equipped elbow electric screwdriver of this utility model.

[0017] Figure 2This is an exploded structural diagram of an embodiment of the sensor-equipped elbow electric screwdriver of this utility model.

[0018] Figure 3 This is a partially exploded structural diagram of an embodiment of the sensor-equipped elbow electric screwdriver of this utility model.

[0019] Figure 4 This is a schematic diagram of the installation structure of an embodiment of the flange seat and heat insulation component of the elbow electric screwdriver with sensor according to this utility model.

[0020] Figure 5 This is a schematic diagram of the installation structure of the flange seat and heat insulation component of the elbow electric screwdriver with sensor according to another perspective of this utility model.

[0021] Figure 6 This is a schematic diagram of the structure of an embodiment of the heat insulation component of the elbow electric screwdriver with sensor according to this utility model.

[0022] In the diagram: 1. Elbow electric screwdriver with sensor; 2. Housing assembly; 21. Outer shell; 22. Lower cover; 23. Flange seat; 231. First groove; 232. Second groove; 233. Mounting position; 234. First mounting hole; 24. First moving part; 25. Second moving part; 26. Sliding sleeve; 27. Friction plate; 3. Spindle assembly; 31. Motor; 32. Spindle; 33. Heat insulation component; 331. Positioning groove; 332. Stud; 333. Second mounting hole; 4. Output connector; 5. Torque sensor. Detailed Implementation

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

[0024] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0025] In the diagram, units with similar structures are represented by the same labels.

[0026] Please refer to Figure 1 , Figure 2 , Figure 3In this embodiment, the electric elbow screwdriver 1 with sensor includes a housing 2, a spindle assembly 3, an output connector 4, and a torque sensor 5. The housing 2 includes an outer shell 21, a lower cover 22 disposed at one end of the outer shell 21, a flange seat 23 connected between the outer shell 21 and the lower cover 22, a first movable member 24 movably disposed between the outer shell 21 and one end of the flange seat 23, and a second movable member 25 movably disposed between the other end of the flange seat 23 and the end faces of the outer shell 21 and the lower cover 22. The spindle assembly 3 is disposed inside the outer shell 21, and the output connector 4 is disposed inside the lower cover 22. The output shaft of the spindle assembly 3 passes through the lower cover 22 and connects to the output connector 4. The torque sensor 5 is fixed to the output shaft of the spindle assembly 3.

[0027] During the rotation of the spindle assembly 3, frictional resistance is generated between the flange seat 23 and the inner wall of the corresponding outer shell 21, and between the flange seat 23 and the lower cover 22. By providing a first movable member 24 between one end of the flange seat 23 and the inner wall of the outer shell 21, and a second movable member 25 between the other end of the flange seat 23 and the end cover of the lower cover 22, the frictional resistance between the surfaces is changed to rolling friction. This also reduces the contact area, thereby reducing frictional resistance and effectively reducing the influence of the frictional force exerted by the outer shell 21 and the lower cover 22 on the flange seat 23. This, in turn, reduces the resistance to the rotation of the spindle assembly 3, thereby improving the detection accuracy of the torque sensor 5.

[0028] In this embodiment, please refer to Figure 3 , Figure 4 , Figure 5 The flange seat 23 has several first movable parts 24. A plurality of first grooves 231 are spaced apart on the circumference of one end of the flange seat 23 facing the inner wall of the outer casing 21. At least one first movable part 24 is disposed within each first groove 231, and the side of the first movable part 24 protrudes from the first groove 231 to fit against the inner wall of the outer casing 21. The spaced arrangement of one end of the flange seat 23 with the inner wall of the outer casing 21 reduces the frictional resistance between the outer casing 21 and the flange seat 23, improving the accuracy of torque detection.

[0029] Preferably, the first movable component 24 is configured as a needle roller structure, with its central axis aligned with the length direction of the output shaft of the main spindle assembly 3. This improves the load-bearing capacity of the first movable component 24 and extends its service life. The needle rollers are cylindrical, and the central axis of the first movable component 24 is radially arranged. Several first movable components 24 are evenly distributed along the end face of the flange seat 23, effectively balancing the influence of frictional forces in various directions, resulting in better performance.

[0030] Specifically, there is a rolling friction between the circumferential side of the flange seat 23 and the inner wall of the housing 21. The first moving part 24 is rolled between the flange seat 23 and the inner wall of the housing 21, which can eliminate the circumferential friction and thus improve the detection accuracy of the torque sensor 5.

[0031] In this embodiment, please refer to Figure 3 , Figure 4 , Figure 5 Several second movable parts 25 are provided. Several second grooves 232 are provided at intervals on the circumference of the other end of the flange seat 23, and a second movable part 25 is provided in each second groove 232. The circumference of the second movable part 25 protrudes from the second groove 232 to simultaneously abut against the inner wall of the outer shell 21 and the end face of the lower cover 22, which can simultaneously reduce the frictional resistance between the flange seat 23 and the inner wall of the outer shell 21 and the end face of the lower cover 22, thereby improving the accuracy of detection.

[0032] Specifically, a plurality of second movable members 25 are provided within the second groove 232, and the plurality of second movable members 25 are arranged adjacent to each other along the central axis of the flange seat 23. One side of each of the plurality of second movable members 25 located on the circumferential side of the flange seat 23 is slidably connected to the inner wall of the outer casing 21, which can eliminate the circumferential friction between the flange seat 23 and the inner wall of the outer casing 21. The second movable member 25 located at the outer end of each second groove 232 is slidably connected to the outer end face of the lower cover 22, which can reduce the friction between the end face of the flange seat 25 facing away from the motor 31 and the outer end face of the lower cover 22.

[0033] Preferably, the second movable member 25 is configured as a steel ball structure, which allows the flange seat 23 to achieve sliding contact rolling friction with the inner wall of the outer casing 21 and the end face of the lower cover 22, resulting in less resistance. Each second groove 232 contains at least two second movable members 25, and multiple second movable members 25 are arranged side-by-side along the length direction of the second groove 232, which is aligned with the length direction of the output shaft of the main shaft device 3.

[0034] In this design, multiple second movable members 25 arranged adjacent to each other along the central axis of the flange seat 23 are disposed within the second groove 232. Each of the second movable members 25 has one side of its circumference slidably connected to the inner wall of the outer casing 21, thus eliminating friction between the inner wall of the outer casing 21 and the circumference of the flange seat 23. Only the second movable member 25 located at the outer end of the flange seat 23 in each second groove 232 is slidably connected to the outer end face of the lower cover 22. Therefore, increasing the number of second grooves 232 can reduce friction between the flange seat 23 and the outer end face of the lower cover 22, and extending the length of each second groove 232 can increase the number of second movable members 25 placed within it, thereby increasing the contact area between the second movable members 25 and the inner wall of the outer casing 21, further reducing friction between the flange seat 23 and the inner wall of the outer casing 21. Therefore, the more second movable members 25 there are, the lower the pressure borne by each individual second movable member 25, and the higher its compressive strength.

[0035] Specifically, four mounting positions 233 are evenly spaced on the circumferential side of the other end of the flange seat 23, and each mounting position 233 has at least two second grooves 232 spaced apart. The distance between two adjacent mounting positions 233 is greater than the distance between two adjacent second grooves 232 in each mounting position 233, making processing easier and saving costs. Of course, the centralized arrangement of the second movable parts 25 in different areas can also increase the contact area between the mounting seat and the inner wall of the housing 21, preventing excessive local stress on the housing 21 that could lead to easy breakage, thereby extending the service life of the equipment.

[0036] In this embodiment, please refer to Figure 2 , Figure 3 To improve the wear resistance of the outer casing 21 and the lower cover 22, the casing assembly 2 also includes a sliding sleeve 26 and a friction plate 27. The sliding sleeve 26 is disposed between the inner side wall of the outer casing 21 and the second movable member 25. The friction plate 27 is fitted between the end face of the lower cover 22 and the second movable member 25, improving wear resistance, extending service life, and preventing the metal movable members from wearing down the inner surface of the outer casing 21 and the outer side of the end face of the lower cover 22.

[0037] In this embodiment, please refer to Figure 2 , Figure 3 , Figure 5 , Figure 6The spindle assembly 3 includes a motor 31, a spindle 32, and a heat insulation component 33. The motor 31 is connected to the spindle 32, and the heat insulation component 33 is mounted on the output shaft of the spindle 32. The heat insulation component 33 is sandwiched between the end of the motor 31 and the end face of the flange seat 23. The heat insulation component 33 is made of a material with low thermal conductivity, which can prevent rapid heat transfer, thereby eliminating the influence of the heat generated by the motor 31 on the torque sensor 5 and improving the detection accuracy. During high-speed operation or when the motor 31 is blocked, the instantaneous current of the motor 31 will increase, resulting in heat generation and a rapid temperature rise. This temperature rise has a significant impact on the torque sensor 5, as the spring of the torque sensor 5 expands and contracts with temperature changes and is very sensitive to temperature. The heat insulation component 33 effectively prevents rapid heat transfer, and with the addition of the heat insulation component 33, the torque sensor 5 is less affected by temperature. The heat insulation component 33 is made of a non-metallic material with low thermal conductivity, providing better heat insulation.

[0038] To facilitate the installation of the heat insulation component 33 onto the motor 31 and improve installation efficiency, multiple positioning holes can be spaced out at the end of the motor 31. The heat insulation component 33 is designed as a ring structure, with multiple through positioning grooves 331 spaced out along its circumference. The length direction of the positioning grooves 331 is the same as the direction of the main shaft 32. Each positioning groove 331 corresponds to a positioning hole. The heat insulation component 33 is fixed in the positioning hole by one end of a positioning stud 332 passing through the positioning groove 331, thereby improving installation efficiency and accuracy.

[0039] For preferred options, please refer to [the provided text]. Figure 4 , Figure 5 , Figure 6 The flange seat 23 has a mounting groove at the end facing the motor 31, and the heat insulation component 33 is inserted into the mounting groove at the end facing away from the motor 31. The flange seat 23 has multiple first mounting holes 234 arranged along its axial direction, and the heat insulation component 33 has correspondingly multiple second mounting holes 333, all of which are offset from the positioning groove 331. The flange seat 23 is simultaneously threaded to the first mounting holes 234 and the second mounting holes 333 by screws to fix the flange seat 23 and the heat insulation component 33, resulting in a compact structure and higher stability.

[0040] During installation, the heat insulation component 33 is fitted onto the main shaft 32, ensuring that the positioning groove 331 of the heat insulation component 33 corresponds one-to-one with the positioning holes on the motor 31. Then, studs 332 are inserted into the positioning grooves 331 and positioning holes to secure the heat insulation component 33 and the motor 31. The end of the heat insulation component 33 facing away from the motor 31 is inserted into the mounting groove. The first mounting hole 234 on the flange seat 23 corresponds one-to-one with the second mounting hole 333 on the heat insulation component 33, and screws are tightened to secure the flange seat 23 and the heat insulation component 33. The motor 31, heat insulation component 33, and flange seat 23 are housed within the outer casing 21. The outer casing 21 and the lower cover 22 are fixedly connected by screws. The main shaft 32 passes through the lower cover 22 and connects to the output connector 4. The motor 31 drives the main shaft 32 to rotate, causing the outer casing 21 and lower cover 22 to also rotate. The rotation trend of the flange seat 23 is opposite to that of the outer casing 21 and lower cover 22. Therefore, the first movable part 24 can realize rolling friction between the flange seat 23 and the inner wall of the housing 21, and the second movable part 25 can simultaneously realize rolling friction between the flange seat 23 and the inner wall of the housing 21 and the end face of the lower cover 22, thereby reducing the influence of the frictional resistance between the three on the output torque of the motor 31 and improving the detection accuracy of the torque sensor 5.

[0041] In this embodiment, the present invention relates to a bent electric screwdriver with a sensor. The bent electric screwdriver with a sensor includes a housing, a spindle assembly, an output connector, and a torque sensor. The housing assembly includes an outer shell, a lower cover disposed at one end of the outer shell, a flange seat connected between the outer shell and the lower cover, a first movable member movably disposed between the outer shell and one end of the flange seat, and a second movable member movably disposed between the other end of the flange seat, the end faces of the outer shell, and the lower cover. The spindle assembly is disposed inside the outer shell, and the output connector is disposed inside the lower cover. The output shaft of the spindle assembly passes through the lower cover and connects to the output connector. The torque sensor is fixed to the output shaft of the spindle assembly. The first movable member is disposed between the outer shell and the flange seat, and the second movable member is disposed between the mating surfaces of the flange seat and the lower cover, providing a sliding contact connection between the end face of the outer shell and the flange seat, and between the flange seat and the lower cover, to reduce frictional resistance and improve the detection accuracy of the torque sensor. This, in turn, improves the work efficiency, installation accuracy, and installation quality of the present invention.

[0042] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A bent electric screwdriver with a sensor, characterized in that, include: The housing device includes an outer shell, a lower cover disposed at one end of the outer shell, a flange seat connected between the outer shell and the lower cover, a first movable member movably disposed between the outer shell and one end of the flange seat, and a plurality of second movable members movably disposed between the other end of the flange seat, the end faces of the outer shell and the lower cover; the first movable member is a needle roller structure, and the second movable members are steel ball structures; The spindle assembly is housed within the outer casing; An output connector is disposed inside the lower cover, and the output shaft of the main shaft device passes through the lower cover and is connected to the output connector. as well as, A torque sensor is fixed to the output shaft of the spindle assembly.

2. The electric screwdriver with sensor according to claim 1, characterized in that, The first movable component is provided in a plurality of manners; a plurality of first grooves are provided at intervals on the periphery of one end of the flange seat facing the inner sidewall of the housing, and at least one first movable component is provided in each first groove. The side of the first movable component protrudes from the first groove to fit against the inner sidewall of the housing, and the periphery of one end of the flange seat is spaced apart from the inner sidewall of the housing.

3. The electric screwdriver with sensor according to claim 2, characterized in that, The central axis of the first movable component is oriented in the same direction as the length direction of the output shaft of the main shaft device.

4. The electric screwdriver with sensor according to claim 1, characterized in that, The second movable component is provided in several parts; the other end of the flange seat is provided with several second grooves at intervals, and each second groove is provided with a second movable component; the circumferential side of the second movable component protrudes from the second groove to simultaneously abut against the inner wall of the outer shell and the end face of the lower cover.

5. The electric screwdriver with sensor according to claim 4, characterized in that, Each of the second grooves is provided with at least two second movable members, and multiple second movable members are arranged side by side along the length direction of the second groove, the length direction of the second groove being the same as the length direction of the output shaft of the main shaft device.

6. The electric screwdriver with sensor according to claim 4, characterized in that, The flange seat has four mounting positions evenly spaced on its circumferential side at the other end, and each mounting position has at least two second grooves spaced apart; the distance between two adjacent mounting positions is greater than the distance between two adjacent second grooves in each mounting position.

7. The electric screwdriver with sensor according to claim 4, characterized in that, The housing device further includes a sliding sleeve and a friction plate; the sliding sleeve is disposed between the inner side wall of the housing and the second movable member; the friction plate is fitted and connected between the end face of the lower cover and the second movable member.

8. The electric screwdriver with sensor according to claim 1, characterized in that, The spindle assembly includes a motor, a spindle, and a heat insulation component; the motor is connected to the spindle, and the heat insulation component is fitted onto the output shaft of the spindle, with the heat insulation component sandwiched between the end of the motor and the end face of the flange seat.

9. The electric screwdriver with sensor according to claim 8, characterized in that, The motor has multiple positioning holes spaced apart at its end; the heat insulation component is configured as an annular structure, and multiple through positioning grooves are spaced apart along its circumference, with the length direction of the positioning grooves being the same as the direction of the main shaft; each positioning groove corresponds to one positioning hole, and the heat insulation component is fixed in the positioning hole by one end of a positioning stud passing through the positioning groove.

10. The electric screwdriver with sensor according to claim 9, characterized in that, The flange seat has a mounting groove at one end facing the motor, and the heat insulation component is inserted into the mounting groove at the other end facing away from the motor. The flange seat has a plurality of first mounting holes arranged along its axial direction, and the heat insulation component has a plurality of second mounting holes correspondingly arranged thereon. The plurality of second mounting holes are all offset from the positioning groove. The flange seat is simultaneously threaded to the first mounting holes and the second mounting holes by screws to fix the flange seat and the heat insulation component.

Images