CN210115852U

CN210115852U - Insulating interchangeable formula moment of torsion screwdriver

Info

Publication number: CN210115852U
Application number: CN201920593903.3U
Authority: CN
Inventors: 欧阳定文
Original assignee: Shanghai Ou Wei Si Instrument Manufacturing Co Ltd
Current assignee: Shanghai Ou Wei Si Instrument Manufacturing Co Ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-02-28
Anticipated expiration: 2029-04-28

Abstract

The utility model discloses an insulating interchangeable formula moment of torsion screwdriver relates to screwdriver technical field, it includes the handle, cutter arbor and tool bit, the cutter arbor is located between handle and the tool bit, a serial communication port, the installation cavity has been seted up towards the face of cutter arbor to the handle, the one end that the tool bit was kept away from to the cutter arbor is located the installation cavity and overlaps and be equipped with synchronous pivoted first ratchet, be provided with the coaxial and meshed second ratchet with first ratchet in the installation cavity, the second ratchet only removes along handle length direction, be provided with the spring that is used for providing resistance between second ratchet and the first ratchet in the installation cavity. The utility model has the advantages of reduce the screw and damage to improve the life of screw.

Description

Insulating interchangeable formula moment of torsion screwdriver

Technical Field

The utility model belongs to the technical field of the screwdriver technique and specifically relates to an insulating interchangeable formula moment of torsion screwdriver is related to.

Background

A screwdriver is a tool used to turn a screw to force it into place and typically has a thin wedge shaped head that is inserted into a slot in the head of the screw. The screws on the market are various in types, and the required force for screwing is different according to the thickness, length, materials, the position of the screw and the like.

When the existing screwdriver is used for screwing a screw, the screwdriver head of the screwdriver is aligned to the position of a notch of the screw, and then the handle is rotated to apply force. But because the cutter arbor is kept away from the one end fixed mounting of tool bit on the handle to the effort that applies to the handle will directly pass to the tool bit on, thereby when the staff application of force was too big, can lead to the too big power of tool bit effect on the screw, leads to smooth silk, notch deformation etc..

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an insulating interchangeable formula moment of torsion screwdriver has the advantage that reduces the screw and damage to improve the life of screw.

The utility model aims at realizing through the following technical scheme:

the utility model provides an insulating interchangeable formula moment of torsion screwdriver, includes the handle, cutter arbor and tool bit, the cutter arbor is located between handle and the tool bit, a serial communication port, the installation cavity has been seted up towards the face of cutter arbor to the handle, the one end that the tool bit was kept away from to the cutter arbor is located the installation cavity and the cover is equipped with synchronous pivoted first ratchet, be provided with in the installation cavity with the coaxial and meshed second ratchet of first ratchet, the second ratchet only moves along handle length direction, be provided with in the installation cavity and be used for providing the spring of resistance between second ratchet and the first ratchet.

Adopt above-mentioned technical scheme, through setting up the spring, the spring has limited the scope for the effort between first ratchet and the second ratchet. When the handle is rotated, the handle drives the second ratchet wheel to rotate, the second ratchet wheel supports tightly with first ratchet wheel under the effect of spring, thereby drive first ratchet wheel and rotate, in order to realize transferring the cutter arbor and rotate, but when the staff application of force is great, second ratchet effort is great promptly, lead to the second ratchet wheel to break away from first ratchet wheel along the length direction of handle when rotating, make the handle can rotate and the guide arm can't continue to drive the screw rotation, pass to the screw through the cutter arbor in order to avoid too big effort, lead to the screw to slide, the notch damages, in order to improve the life of screw.

The utility model discloses further set up to: the second ratchet wheel and the spring are arranged on one side of the first ratchet wheel, which is far away from the tool bit.

By adopting the technical scheme, the common part of the screwdriver rod is clamped into the handle, so that the second ratchet wheel and the spring are arranged far away from the screwdriver head, and the overall length of the screwdriver is ensured to meet the market requirement when the processing steps of the screwdriver rod are not increased.

The utility model discloses further set up to: be provided with the adjusting part who is used for adjusting spring length in the installation cavity, adjusting part includes synchronous pivoted knob, regulation pole and compact heap, and the knob is located outside the installation cavity, and the compact heap is located the installation cavity, adjusts the pole and connects in knob and compact heap, and the lateral wall and the installation cavity inner wall threaded connection of compact heap, the both ends of spring respectively with compact heap, second ratchet butt.

Adopt above-mentioned technical scheme, through rotating the knob, drive and adjust the pole, the compact heap rotates in step, because compact heap and installation cavity inner wall threaded connection to drive the compact heap and remove along the length direction of handle, because the both ends of spring respectively with compact heap, second ratchet butt, realize the regulation to the whole length of spring, thereby adjust the effort between first ratchet and the second ratchet, realize adjusting the moment of torsion of this screwdriver, be convenient for adjust the output torsion of screwdriver according to the specification of screw.

The utility model discloses further set up to: the installation cavity is internally provided with a force unloading plate which only moves along the length direction of the handle, and the force unloading plate is positioned between the spring and the pressing block.

By adopting the technical scheme, the pressing block can rotate while the elastic force of the spring is adjusted, so that the spring is driven to rotate, the torsion of the spring is deviated from the preset torsion, and the force unloading plate is driven to move only along the length direction of the handle while the pressing plate rotates, so that the influence on the elastic force of the spring is reduced.

The utility model discloses further set up to: the force unloading plate is fixed with an adjusting column arranged along the length direction of the handle, scales are arranged on the adjusting column, the surface of the handle is provided with an observation port communicated with the mounting cavity to observe the scales, and a transparent plate is embedded in the observation port.

By adopting the technical scheme, the staff can observe the scales on the adjusting column through the transparent plate, and when the knob is rotated, the force unloading plate and the adjusting column move along the length direction of the handle, so that the scales can be observed in real time and the torque force corresponding to the screwdriver can be known.

The utility model discloses further set up to: the mounting cavity is also internally provided with a third ratchet wheel which only moves along the length direction of the handle, the first ratchet wheel is positioned between the second ratchet wheel and the third ratchet wheel, and the third ratchet wheel is coaxial and meshed with the first ratchet wheel.

By adopting the technical scheme, the third ratchet wheel is arranged between the first ratchet wheel and the second ratchet wheel, and the two surfaces of the first ratchet wheel are synchronously meshed with the third ratchet wheel and the second ratchet wheel, so that the limiting effect of the whole first ratchet wheel is improved.

The utility model discloses further set up to: the cutter arbor sets gradually into pole portion and polygon portion from the direction of tool bit towards the handle, and the installing port with polygon portion cooperation joint is seted up to first ratchet, is provided with the spacing subassembly that makes the cutter arbor fixed for the handle on the handle.

Adopt above-mentioned technical scheme, because the cutter arbor divide into pole portion and polygon portion to realize dismantling of cutter arbor and handle, and through the cooperation of polygon portion and installing port, realize the synchronous rotation of first ratchet and cutter arbor.

The utility model discloses further set up to: the limiting assembly comprises an annular groove and a clamping jaw, the annular groove is formed in the surface of the round rod part, the annular groove and the round rod part are coaxially arranged, one end of the clamping jaw is fixed on the inner wall of the mounting cavity, and a clamping block matched and clamped with the annular groove is fixed at the other end of the clamping jaw.

By adopting the technical scheme, the annular groove and the clamping jaw are arranged, when the clamping block is matched and clamped with the annular groove, the installation of the cutter bar and the handle is realized, and when the clamping block is separated from the annular groove, the disassembly of the cutter bar and the handle is realized.

The utility model discloses further set up to: the push cylinder is sleeved on the round rod part, and the end part of the push cylinder facing the annular groove is provided with a guide surface facilitating the fixture block to be separated from the annular groove.

By adopting the technical scheme, when the push cylinder moves towards the annular groove along the axis of the round rod part, the corresponding end part of the clamping jaw is separated from the annular groove under the action of the guide surface, so that the quick disassembly and assembly are convenient.

To sum up, the utility model discloses a beneficial technological effect does:

(1) when the force applied by a worker is large, the second ratchet wheel is separated from the first ratchet wheel along the length direction of the handle when rotating, so that the handle can rotate and the guide rod cannot continuously drive the screw to rotate, the phenomenon that the excessive acting force is transmitted to the screw through the cutter bar to cause the screw to slide and the notch to be damaged is avoided, and the service life of the screw is prolonged;

(2) the adjusting rod and the pressing block are driven to synchronously rotate by rotating the knob, so that the overall length of the spring is adjusted, and the output torque force of the screwdriver is conveniently adjusted according to the specification of the screw;

(3) through unloading the board, take the pressure strip pivoted while, drive and unload the board and only move along handle length direction to reduce the influence to spring force.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a partial schematic view of FIG. 1;

FIG. 3 is an enlarged partial schematic view of portion A of FIG. 2;

fig. 4 is a partial cross-sectional view of fig. 1.

Reference numerals: 1. a handle; 2. a cutter head; 3. a cutter bar; 31. a round bar part; 32. a polygonal portion; 4. a mounting cavity; 5. a first ratchet wheel; 6. a slider; 7. a second ratchet wheel; 8. a third ratchet wheel; 9. a chute; 10. an installation port; 11. a limiting component; 111. an annular groove; 112. a claw; 12. a clamping block; 13. a push cylinder; 14. a guide surface; 15. a limiting plate; 16. a spring; 17. an adjustment assembly; 171. a knob; 172. adjusting a rod; 173. a compression block; 18. an adjustment column; 19. a transparent plate; 20. a ring block; 21. and (7) a stress relief plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, an insulating interchangeable formula moment of torsion screwdriver includes handle 1, cutter arbor 3 and tool bit 2, and the one end and the tool bit 2 of cutter arbor 3 are fixed, and the other end can be dismantled fixedly with handle 1, and cutter arbor 3, handle of a knife, the coaxial setting of handle 1. Cutter arbor 3 and tool bit 2 generally are made with the resistant alloy material that is good with shock-resistant performance, hardness and toughness, have longer life, and the surface of handle 1 can be fixed with the elastic layer, and the elastic layer can set up to rubber to have insulating effect.

Referring to fig. 1 and 4, the handle 1 has been seted up installation cavity 4, and installation cavity 4 runs through the setting of handle 1 along the length direction of handle 1, and the cross section of installation cavity 4 is circular setting, and wherein the cross section of installation cavity 4 is the setting of type of protruding towards cutter arbor 3.

Referring to fig. 2 and 4, a first ratchet wheel 5, a second ratchet wheel 7 and a third ratchet wheel 8 are arranged in the installation cavity 4, the first ratchet wheel 5 is positioned between the second ratchet wheel 7 and the third ratchet wheel 8 and is coaxially arranged, and two surfaces of the first ratchet wheel 5 are synchronously meshed with the third ratchet wheel 8 and the second ratchet wheel 7. The first ratchet wheel 5 and the second ratchet wheel 7 can rotate relatively, the first ratchet wheel 5 and the third ratchet wheel 8 can rotate relatively, and the second ratchet wheel 7 and the third ratchet wheel 8 can rotate relatively.

Referring to fig. 2 and 4, a sliding groove 9 is formed in the mounting cavity 4 and arranged along the length direction of the mounting cavity, two ends of the sliding groove 9 do not penetrate through the mounting cavity 4, and sliding blocks 6 only matched and clamped with the sliding groove 9 are respectively fixed on the side walls of the second ratchet 7 and the third ratchet 8, so that the first ratchet 5 and the second ratchet 7 only move along the length direction of the first ratchet, and the sliding blocks 6 on the third ratchet 8 are usually abutted against one end of the sliding groove 9 facing the cutter bar 3.

Referring to fig. 3 and 4, the tool bar 3 is sequentially arranged into a round bar part 31 and a polygonal part 32 from the tool bit 2 to the handle 1, the round bar part 31 is arranged in a cylindrical shape, the vertical section of the polygonal part 32 is arranged in a hexagonal shape, and the polygonal part 32 and a part of the round bar part 31 extend into the installation cavity 4.

Referring to fig. 3, the third ratchet 8 is provided with a circular opening for the polygonal portion 32 to pass through, the first ratchet 5 is provided with a mounting opening 10 matched with the polygonal portion 32, the vertical cross section of the mounting opening 10 is also in a hexagonal arrangement, and the size of the mounting opening 10 is equal to or slightly smaller than that of the polygonal portion 32, so that the third ratchet 8 and the cutter bar 3 can rotate synchronously.

Referring to fig. 2 and 3, the handle 1 is provided with a stop assembly 11 for fixing the blade bar 3 with respect to the handle 1, the stop assembly 11 including an annular groove 111 and a pawl 112.

Referring to fig. 2 and 3, an annular groove 111 is provided at one end of the round rod portion 31 that can protrude into the mounting cavity 4. The annular groove 111 is coaxial with the round rod part 31, and one end of the annular groove 111 facing the cutter head 2 is provided with a round corner; the clamping jaws 112 can be provided with three and evenly arranged along the circumferential direction of the installation cavity 4, one end of each clamping jaw 112 is fixed on the inner wall of the installation cavity 4, and the other end of each clamping jaw 112 is fixed with a clamping block 12 which is matched and clamped with the annular groove 111. The polygonal part 32 is inserted into the mounting cavity 4, the polygonal part 32 is clamped into the mounting opening 10, the clamping jaws 112 are attached to the round rod part 31, and the clamping blocks 12 are clamped into the annular grooves 111, so that the tool bar 3 and the handle 1 can be detached.

Referring to fig. 2 and 3, a push cylinder 13 and a limit plate 15 are sleeved on the round rod portion 31, the limit plate 15 is fixed on the cutter bar 3, the push cylinder 13 is located between the limit plate 15 and the annular groove 111, one end of the push cylinder 13 is located in the installation cavity 4, the other end of the push cylinder 13 is fixed with an annular block 20, the annular block 20 is located outside the installation cavity 4 all the time, a guide surface 14 is arranged at the end of the push cylinder 13 facing the annular groove 111, and the guide surface 14 extends towards the axis of the cutter bar 3. The push cylinder 13 is pushed toward the annular groove 111, so that the latch 12 is quickly separated from the annular groove 111.

Referring to fig. 2 and 4, a spring 16 is disposed in the mounting cavity 4, and both ends of the spring 16 can be fixed or abutted to the second ratchet 7 and the force-releasing plate 21, respectively. The axis of the spring 16 coincides with the axis of the handle 1; the outer wall of the force unloading plate 21 is fixed with a convex block which is in sliding clamping connection with the sliding groove 9, so that the force unloading plate 21 only moves along the length direction of the handle 1, and the rotating deformation of the spring 16 is reduced.

Referring to fig. 2 and 4, an adjusting assembly 17 is arranged in the mounting cavity 4, the adjusting assembly 17 is used for adjusting the length of the spring 16, the adjusting assembly 17 comprises a knob 171, an adjusting rod 172 and a pressing block 173, and the knob 171, the adjusting rod 172 and the pressing block 173 are coaxial and synchronous. The knob 171 is positioned outside the installation cavity 4, the knob 171 is only in rotary connection with the outer wall of the handle 1, and friction stripes are fixed on the knob 171; the section that adjusts pole 172 is the hexagon setting, and one end is fixed with knob 171, and the other end passes compact heap 173, and compact heap 173 is located installation cavity 4, and the outer wall of compact heap 173 and the inner wall threaded connection of installation cavity 4. By rotating the knob 171, the adjusting rod 172 and the pressing block 173 are driven to rotate synchronously, so as to drive the force releasing plate 21 to move along the length direction of the handle 1, thereby adjusting the torque force which can be applied by the cutter bar 3.

Referring to fig. 2 and 4, the face of the force unloading plate 21 facing the installation cavity 4 is fixed with an adjusting column 18, the adjusting column 18 is arranged along the length direction of the handle 1, scale marks are arranged on the outer surface of the adjusting column 18, an observation port is formed in the surface of the handle 1 and communicated with the installation cavity 4, a transparent plate 19 is embedded in the observation port, and the transparent plate 19 is used for observing the scale marks. When the knob 171 is rotated, the force-releasing plate 21 and the adjusting column 18 move synchronously, so that the width of the transparent plate 19 that can be observed changes.

The implementation principle of the embodiment is as follows: by rotating the knob 171, the corresponding scale is observed from the transparent plate 19 to adjust the torque force that can be applied by the knife bar 3, and then the polygonal portion 32 of the knife bar 3 is snapped into the viewing port, and the snap blocks 12 are simultaneously snapped into the annular groove 111.

The tool bit 2 is clamped into a notch of a screw, when a worker rotates the handle 1, the tool bar 3, the first ratchet wheel 5, the second ratchet wheel 7 and the third ratchet wheel 8 are driven to synchronously rotate relative to the screw, when the acting force of the worker is larger than the preset torque force, the handle 1 drives the second ratchet wheel 7 and the third ratchet wheel 8 to synchronously rotate relative to the screw, and the first ratchet wheel 5 is static relative to the screw.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an insulating interchangeable formula moment of torsion screwdriver, including handle (1), cutter arbor (3) and tool bit (2), cutter arbor (3) are located between handle (1) and tool bit (2), a serial communication port, installation cavity (4) have been seted up towards the face of cutter arbor (3) in handle (1), the one end that cutter arbor (3) kept away from tool bit (2) is located installation cavity (4) and the cover is equipped with synchronous pivoted first ratchet (5), be provided with in installation cavity (4) with coaxial and the meshed second ratchet (7) of first ratchet (5), second ratchet (7) only move along handle (1) length direction, be provided with in installation cavity (4) and be used for providing spring (16) of resistance between second ratchet (7) and first ratchet (5).

2. The insulation changeable torque screwdriver according to claim 1, wherein the second ratchet wheel (7) and the spring (16) are arranged on the side of the first ratchet wheel (5) far away from the screwdriver head (2).

3. The insulation replaceable torque screwdriver according to claim 2, wherein an adjusting assembly (17) for adjusting the length of the spring (16) is arranged in the mounting cavity (4), the adjusting assembly (17) comprises a knob (171), an adjusting rod (172) and a pressing block (173) which rotate synchronously, the knob (171) is located outside the mounting cavity (4), the pressing block (173) is located in the mounting cavity (4), the adjusting rod (172) is connected to the knob (171) and the pressing block (173), the side wall of the pressing block (173) is in threaded connection with the inner wall of the mounting cavity (4), and two ends of the spring (16) are respectively abutted to the pressing block (173) and the second ratchet wheel (7).

4. The insulation changeable torque screwdriver according to claim 3, wherein the force releasing plate (21) is arranged in the mounting cavity (4) and only moves along the length direction of the handle (1), and the force releasing plate (21) is arranged between the spring (16) and the pressing block (173).

5. The insulation replaceable torque screwdriver according to claim 4, wherein the force unloading plate (21) is fixed with an adjusting column (18) arranged along the length direction of the handle (1), the adjusting column (18) is provided with scales, the surface of the handle (1) is provided with an observation port communicated with the mounting cavity (4) for observing the scales, and a transparent plate (19) is embedded in the observation port.

6. An insulation replaceable torque screwdriver according to claim 2, wherein a third ratchet wheel (8) moving only along the length direction of the handle (1) is arranged in the mounting cavity (4), the first ratchet wheel (5) is arranged between the second ratchet wheel (7) and the third ratchet wheel (8), and the third ratchet wheel (8) is coaxial and meshed with the first ratchet wheel (5).

7. The insulation replaceable torque screwdriver according to claim 1, wherein the screwdriver rod (3) is sequentially provided with a round rod part (31) and a polygonal part (32) from the screwdriver head (2) to the handle (1), the first ratchet wheel (5) is provided with a mounting opening (10) matched and clamped with the polygonal part (32), and the handle (1) is provided with a limiting assembly (11) for fixing the screwdriver rod (3) relative to the handle (1).

8. The insulation replaceable torque screwdriver according to claim 7, wherein the limiting component (11) comprises an annular groove (111) and a clamping jaw (112), the annular groove (111) is formed in the surface of the round rod part (31), the annular groove (111) and the round rod part (31) are coaxially arranged, one end of the clamping jaw (112) is fixed on the inner wall of the mounting cavity (4), and the other end of the clamping jaw (112) is fixed with a clamping block (12) which is matched and clamped with the annular groove (111).

9. The insulation replaceable torque screwdriver as recited in claim 8, wherein the round rod portion (31) is sleeved with a push cylinder (13), and the end of the push cylinder (13) facing the annular groove (111) is provided with a guide surface (14) for facilitating the disengagement of the clamping block (12) from the annular groove (111).