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CN113894750A - Supplementary instrument of unscrewing of screwing up in multipurpose laboratory - Google Patents

Supplementary instrument of unscrewing of screwing up in multipurpose laboratory Download PDF

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Publication number
CN113894750A
CN113894750A CN202111306200.6A CN202111306200A CN113894750A CN 113894750 A CN113894750 A CN 113894750A CN 202111306200 A CN202111306200 A CN 202111306200A CN 113894750 A CN113894750 A CN 113894750A
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CN
China
Prior art keywords
driven gear
thread
threaded rod
hole
rotating shaft
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Pending
Application number
CN202111306200.6A
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Chinese (zh)
Inventor
徐艳
宋明
石利泺
许雪娜
孙丽美
万红日
陈腾
董黎明
杨华美
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Xuzhou University of Technology
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Xuzhou University of Technology
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Publication date
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Priority to CN202111306200.6A priority Critical patent/CN113894750A/en
Publication of CN113894750A publication Critical patent/CN113894750A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

本发明公开一种多用途实验室辅助拧紧拧松工具,包括手柄机构,手柄组件包括把手和螺纹杆,把手上对称贯穿开设有两个第一通孔,螺纹杆一端贯穿开设有第二通孔,把手穿设在第二通孔内;传动机构,传动机构一端与螺纹杆可拆卸连接;旋动机构,旋动机构包括模具本体,模具本体与传动机构可拆卸连接。本装置在实际使用时使拧动阀门或者螺钉更加省力,解决了手部力量较弱的人员转动钢瓶阀门或器械螺钉时费力的问题。

Figure 202111306200

The invention discloses a multi-purpose laboratory auxiliary tightening and loosening tool, comprising a handle mechanism, a handle assembly including a handle and a threaded rod, two first through holes symmetrically penetrated through the handle, and a second through hole penetrated through one end of the threaded rod The handle is penetrated in the second through hole; the transmission mechanism, one end of the transmission mechanism is detachably connected with the threaded rod; the rotating mechanism, the rotating mechanism includes a mold body, and the mold body and the transmission mechanism are detachably connected. When the device is actually used, it is more labor-saving to turn the valve or the screw, which solves the problem of laboriousness when turning the cylinder valve or the screw of the instrument by the person with weak hand strength.

Figure 202111306200

Description

Supplementary instrument of unscrewing of screwing up in multipurpose laboratory
Technical Field
The invention relates to the technical field of auxiliary tools, in particular to a multipurpose laboratory auxiliary tightening and loosening tool.
Background
In a chemical industry and material professional laboratory, the situation that a screw or a valve needs to be screwed and unscrewed is often met, and especially for a gas steel cylinder valve needing to be sealed, if the valve cannot be screwed, gas leakage can be caused, so that dangers are caused, and especially flammable and explosive gas is easy to burn. Generally, screws of a steel cylinder valve or various instruments are screwed manually, and for laboratory personnel with weak hand strength, the problems that the steel cylinder valve cannot be opened or closed or screws of certain instruments cannot be loosened or fastened in place often exist.
Disclosure of Invention
The invention aims to provide a multipurpose laboratory auxiliary screwing and unscrewing tool to solve the problems in the prior art, and laboratory personnel can easily open or close a steel cylinder valve or unscrew a screw of a screwing instrument through the device.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a multipurpose laboratory auxiliary screwing and unscrewing tool, which comprises:
the handle mechanism comprises a handle and a threaded rod, two first through holes are symmetrically formed in the handle in a penetrating mode, a second through hole is formed in one end of the threaded rod in a penetrating mode, and the handle penetrates through the second through hole;
one end of the transmission mechanism is detachably connected with the threaded rod;
the rotating mechanism comprises a die assembly, and the die assembly is detachably connected with the transmission mechanism.
Preferably, the mold assembly is a first mold body, a plurality of mounting grooves are formed in the center of the first mold body, the mounting grooves are coaxially arranged, and the sizes of the mounting grooves decrease from bottom to top.
Preferably, the mould subassembly includes second mould body and a plurality of joint, the second mould body with the connection can be dismantled, a plurality of first joint holes have been seted up to second mould body terminal surface, it has the joint piece to connect one end, it has the application of force head to connect the other end, the joint piece with the connection can be dismantled in first joint hole.
Preferably, the threaded rod comprises a cross rod and a vertical rod, the cross rod is perpendicular to and fixedly connected with the vertical rod, the second through hole penetrates through the cross rod, and the vertical rod is detachably connected with the transmission mechanism.
Preferably, drive mechanism includes the transmission section of thick bamboo, first screw thread and second screw thread have been seted up in the transmission section of thick bamboo, first screw thread with the reverse just symmetry setting of second screw thread is in transmission section of thick bamboo inside wall both ends.
Preferably, the number of the threaded rods is two, a third thread is arranged on the outer edge of the vertical rod of one threaded rod, and the third thread is matched with the first thread; and a fourth thread is formed on the outer edge of the vertical rod of the other threaded rod and is matched with the second thread.
Preferably, a plurality of first screw holes are all seted up at transmission cylinder both ends, any one end of transmission cylinder can be dismantled through the screw and be connected with the intermediate member, the fourth screw hole has been seted up to the intermediate member, the fourth screw hole pass through the screw with the connection can be dismantled to first screw hole, the mould subassembly with the connection can be dismantled to the intermediate member.
Preferably, drive mechanism includes the driving drum, the rigid coupling has first diaphragm and second diaphragm in the driving drum, first diaphragm central point puts to rotate and is connected with first pivot, first pivot one end rigid coupling has power gear, first diaphragm with it is connected with a plurality of second pivots to rotate between the second diaphragm, second pivot rigid coupling has first driven gear and second driven gear, first driven gear is in second driven gear top, power gear with first driven gear meshing, second diaphragm central point puts to rotate and is connected with the third pivot, third pivot rigid coupling has third driven gear, third driven gear with second driven gear meshes mutually, the third pivot pass and with the driving drum diapire rotates and is connected.
Preferably, a second clamping hole is formed in one end, far away from the transverse rod, of the vertical rod, and the second clamping hole is matched with the first rotating shaft.
Preferably, the third rotating shaft is detachably connected with the mold assembly.
The invention discloses the following technical effects: this device is equipped with handle mechanism, handle mechanism includes handle and threaded rod, wear the handle in the second through-hole of threaded rod, and insert the pin in first through-hole, prevent that the handle from deviating from in the second through-hole, conveniently to the threaded rod application of force, drive mechanism gives rotating mechanism with the power transmission of threaded rod, rotating mechanism includes mould assembly, mould assembly is used for unscrewing the steel bottle of valve or the screw that needs screw up or unscrew, this device makes when in-service use and unscrews valve or screw more laborsaving, be fit for the personnel that hand strength is weaker.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of a left-hand screw drive mechanism according to embodiment 3;
FIG. 2 is a schematic structural view of a right-hand screw drive mechanism according to embodiment 3;
FIG. 3 is a schematic view of a threaded rod of the present invention;
FIG. 4 is a schematic structural view of a first mold body according to the present invention;
FIG. 5 is a schematic structural view of a second mold body according to the present invention;
FIG. 6 is a schematic view of a linear joint structure according to the present invention;
FIG. 7 is a schematic view of a cross-shaped joint structure according to the present invention;
FIG. 8 is a schematic view of a hexagon socket joint structure according to the present invention;
FIG. 9 is a schematic view of the handle structure of the present invention;
FIG. 10 is a cross-sectional view of the handle of the present invention;
FIG. 11 is a schematic view of a structure of a transmission cylinder according to embodiment 3;
FIG. 12 is a top view of the transmission cylinder of embodiment 3;
FIG. 13 is a schematic view showing the structure of an intermediate member in embodiment 3;
FIG. 14 is a schematic view of the entire structure of embodiment 4;
wherein, 1, a handle; 2. a threaded rod; 201. a cross bar; 202. a vertical rod; 3. a first through hole; 4. a second through hole; 5. a first mold body; 6. mounting grooves; 7. a second mold body; 8. a joint; 801. a clamping block; 802. a force application head; 9. a first clamping hole; 10. a transmission cylinder; 11. a first screw hole; 14. a fourth screw hole; 15. a middleware; 16. a first transverse plate; 17. a second transverse plate; 18. a first rotating shaft; 19. a power gear; 20. a second rotating shaft; 21. a first driven gear; 22. a second driven gear; 23. a third rotating shaft; 24. a third driven gear; 25. a second clamping hole; 26. and a third clamping hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a multipurpose laboratory auxiliary screwing and unscrewing tool, which comprises:
the handle mechanism comprises a handle 1 and a threaded rod 2, two first through holes 3 are symmetrically formed in the handle 1 in a penetrating mode, a second through hole 4 is formed in one end of the threaded rod 2 in a penetrating mode, and the handle 1 is arranged in the second through hole 4 in a penetrating mode; handle 1 wears in the second through-hole 4 of threaded rod 2, inserts in first through-hole 3 with the pin simultaneously, prevents that handle 1 from deviating from threaded rod 2, when rotatory threaded rod, can increase the moment of threaded rod 2, and is more laborsaving.
One end of the transmission mechanism is detachably connected with the threaded rod 2; the transmission mechanism is used for transmitting the torsional force received by the threaded rod 2.
The rotating mechanism comprises a die assembly, the die assembly is detachably connected with the transmission mechanism, different die assemblies are convenient to replace, and the die assembly is used for unscrewing a steel cylinder of the valve or a screw which needs to be screwed or unscrewed.
Example 1
Referring to fig. 3-4 and 9-10, the mold assembly comprises a first mold body 5, wherein a plurality of mounting grooves 6 are formed in the center of the first mold body 5, the mounting grooves are coaxially arranged, and the sizes of the mounting grooves decrease from bottom to top; the first die body 5 is provided with a mounting groove 6, and the mounting groove 6 can be used for screwing or opening the petal type steel cylinder valve.
This device is when using, wear handle 1 in the second through-hole 4 of threaded rod 2 earlier, and insert in two first through-holes 3 with the fixed pin, fixed pin length is greater than the height of first through-hole 3, can prevent like this that handle 1 from deviating from in second through-hole 4, threaded rod 2 can be dismantled with drive mechanism one end and be connected, threaded rod 2 will do all can the power and transmit for drive mechanism, the drive mechanism other end can be dismantled with drive mechanism and be connected, drive mechanism includes first mould body 5, mounting groove 6 has been seted up to first mould body 5, mounting groove 6 can be used for the not gas steel bottle valve of equidimension.
Example 2
Referring to fig. 3 and 5-10, the mold assembly comprises a second mold body 7 and a plurality of joints 8, the second mold body 7 is detachably connected with the joints 8, a plurality of first clamping holes 9 are formed in the end face of the second mold body 7, a clamping block 801 is arranged at one end of each joint 8, an applying force head 802 is arranged at the other end of each joint 8, and the clamping block 801 is detachably connected with the first clamping holes 9; second mould body 7 can dismantle with joint 8 and be connected, connects 8 direct actions on the screw that needs were screwed up or unscrewed, and joint piece 801 can be dismantled and connect in first joint hole 9, and is more convenient in the in-service use, and application of force head 802 is direct and the screw butt, screws up or unscrews the screw.
This device is when using, wear handle 1 in second through-hole 4 of threaded rod 2 earlier, and insert in two first through-holes 3 with the fixed pin, fixed pin length is greater than the height of first through-hole 3, can prevent like this that handle 1 from deviating from in second through-hole 4, threaded rod 2 can be dismantled with drive mechanism one end and be connected, threaded rod 2 gives drive mechanism with power transmission, the drive mechanism other end can be dismantled with rotating mechanism and be connected, mould subassembly second mould body 7 and a plurality of joint 8, joint 8 can be dismantled with second mould body 7 through joint piece 801 and first joint hole 9 and be connected, conveniently change joint 8, the joint 8 other end has application of force head 802, application of force head 802 directly acts on the screw of various shapes, application of force head 802 has shapes such as word line, cross line, interior hexagonal.
According to a further optimized scheme, the threaded rod 2 comprises a cross rod 201 and a vertical rod 202, the cross rod 201 is perpendicular to and fixedly connected with the vertical rod 202, the second through hole 4 penetrates through the cross rod 201, and the vertical rod 202 is detachably connected with the transmission mechanism; threaded rod 2 sets up to the T type in the in-service use, and handle 1 wears in second through-hole 4, can play the effect of extension horizontal pole 201 length, and it is more laborsaving when screwing up or unscrewing.
Example 3
Referring to fig. 1 to 13, in the present embodiment, the transmission mechanism includes a transmission cylinder 10, a first thread and a second thread are formed in the transmission cylinder 10, and the first thread and the second thread are reversely and symmetrically disposed at two ends of an inner side wall of the transmission cylinder 10; the first thread and the second thread in the transmission cylinder 10 are opposite and symmetrical, and the two ends of the transmission cylinder 10 can be exchanged for use according to the steering direction of the valve in practical application.
According to the further optimized scheme, the number of the threaded rods 2 is two, third threads are formed in the outer edge of the vertical rod 202 of one threaded rod 2, and the third threads are matched with the first threads; a fourth thread is arranged on the outer edge of the vertical rod 202 of the other threaded rod 2 and is matched with the second thread; when the third thread is fitted to the first thread, the valve can be screwed or unscrewed in one thread direction, and when the fourth thread is fitted to the first thread, the valve can be screwed or unscrewed in the other thread direction.
According to a further optimization scheme, a plurality of first screw holes 11 are formed in two ends of the transmission cylinder 10, an intermediate piece 15 is detachably connected to any end of the transmission cylinder 10 through a screw, a fourth screw hole 14 is formed in the intermediate piece 15, the fourth screw hole 14 is detachably connected with the first screw holes 11 through screws, and the mold assembly is detachably connected with the intermediate piece 15; the mold assembly and the intermediate member 15 are detachably connected, and in actual use, the mold assembly can be replaced according to different conditions.
In this embodiment, the number of the threaded rods 2 is two, the outer edge of the vertical rod 202 is respectively provided with a third thread and a fourth thread, the inner walls of the two ends of the transmission cylinder 10 are respectively provided with a first thread and a second thread, the third thread and the fourth thread are respectively matched with the first thread and the second thread, because the threads of the valve switch or the screw have positive and negative directions in practical application, the two threaded rods 2 with different thread directions can deal with different situations, the first screw hole 11 of the transmission cylinder 10 and the fourth screw hole 14 of the intermediate piece 15 are detachably connected using screws, in actual use, the transmission cylinder 10 is driven by different valve switches or the direction of the screw thread, the ends may be reversed and the other end face of the intermediate member 15 used to connect a die assembly which acts on the cylinder valve or on the screw, in this embodiment, laboratory personnel with weak hand strength can easily open or tighten steel cylinder valve switch or screw through the device.
Example 4
Referring to fig. 1-8 and fig. 14, the present embodiment is different from embodiment 3 in a transmission mechanism, the transmission mechanism includes a transmission cylinder 10, a first transverse plate 16 and a second transverse plate 17 are fixedly connected in the transmission cylinder 10, a first rotating shaft 18 is rotatably connected to a central position of the first transverse plate 16, one end of the first rotating shaft 18 is fixedly connected to a power gear 19, a plurality of second rotating shafts 20 are rotatably connected between the first transverse plate 16 and the second transverse plate 17, the second rotating shaft 20 is fixedly connected to a first driven gear 21 and a second driven gear 22, the first driven gear 21 is located on a top of the second driven gear 22, the power gear 19 is engaged with the first driven gear 21, a third rotating shaft 23 is rotatably connected to a central position of the second transverse plate 17, the third rotating shaft 23 is fixedly connected to a third driven gear 24, the third driven gear 24 is engaged with the second driven gear 22, and the third rotating shaft 23 penetrates through and is rotatably connected to a bottom wall of the transmission cylinder 10; the power gear 19 is fixedly connected with the first rotating shaft 18, the first rotating shaft 18 is rotatably connected with the first transverse plate 16, in the embodiment, the first rotating shaft 18 is fixedly connected with an inner ring of a bearing, the first transverse plate 16 is fixedly connected with an outer ring of the bearing, the second rotating shaft 20 is also rotatably connected with the first transverse plate 16 and the second transverse plate 17 in the same way, the third rotating shaft 23 is also rotatably connected with the second transverse plate 17 and the bottom wall of the transmission cylinder 10 in the same way, the power gear 19 transmits power to the first driven gear 21, the first driven gear 21 drives the second driven gear 22 to rotate through the second rotating shaft 20, the second driven gear 22 transmits power to the third driven gear 24, and the third driven gear 24 drives the third rotating shaft 23 to rotate.
In a further optimized scheme, one end of the vertical rod 202, which is far away from the cross rod 201, is provided with a second clamping hole 25, and the second clamping hole 25 is matched with the first rotating shaft 18. Second joint hole 25 and the one end joint back of first pivot 18, through exerting force to horizontal pole 201, can drive first pivot 18 and rotate, in this embodiment, the inside rectangle that is of second joint hole 25, the one end of first pivot 18 is the rectangle, and second joint hole 25 can overlap the end at first pivot 18, and the drive ratio is greater than 1 and can amplifies the power that horizontal pole 201 transmitted into in practical application, finally exports through third pivot 23.
In a further optimized scheme, the third rotating shaft 23 is detachably connected with the mold assembly; the third rotating shaft 23 drives the mold assembly to rotate, and power is output.
In this embodiment, second joint hole 25 has been seted up to montant 202, second joint hole 25 is connected with the end of first pivot 18, it rotates to drive threaded rod 2 through handle 1, thereby drive first pivot 18, first pivot 18 drives power gear 19 and rotates, power gear 19 transmits power for first driven gear 21, first driven gear 21 passes second driven gear 22 again, second driven gear 22 transmits for third driven gear 24, third driven gear 24 drives third pivot 23 and rotates, third pivot 23 drives the mould subassembly and rotates, thereby form power take off, third pivot 23 drives the mould subassembly and rotates, third pivot 23 is kept away from transmission section of thick bamboo 10 one end and has been seted up third joint hole 26, mould subassembly terminal surface rigid coupling has the arch, third joint hole 26 can be dismantled with the arch and be connected. The transmission mechanism in the embodiment enables the device to be more labor-saving in practical application.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims (10)

1. A multipurpose laboratory assisted tightening and loosening tool, comprising:
the handle mechanism comprises a handle (1) and a threaded rod (2), two first through holes (3) are symmetrically formed in the handle (1) in a penetrating mode, one end of the threaded rod (2) is provided with a second through hole (4) in a penetrating mode, and the handle (1) penetrates through the second through hole (4);
one end of the transmission mechanism is detachably connected with the threaded rod (2);
the rotating mechanism comprises a die assembly, and the die assembly is detachably connected with the transmission mechanism.
2. The multi-purpose laboratory assisted tightening and loosening tool of claim 1, wherein: the die assembly is a first die body (5), a plurality of mounting grooves (6) are formed in the center of the first die body (5), the mounting grooves (6) are coaxially arranged, and the mounting grooves decrease in size from bottom to top.
3. The multi-purpose laboratory assisted tightening and loosening tool of claim 1, wherein: the mould assembly comprises a second mould body (7) and a plurality of joints (8), the second mould body (7) and the joints (8) can be disassembled for connection, a plurality of first joint holes (9) are formed in the end face of the second mould body (7), one end of each joint (8) is provided with a joint block (801), the other end of each joint (8) is provided with a force application head (802), and the joint blocks (801) and the first joint holes (9) can be disassembled for connection.
4. The multi-purpose laboratory assisted tightening and loosening tool of claim 1, wherein: threaded rod (2) include horizontal pole (201) and montant (202), horizontal pole (201) with montant (202) is perpendicular and rigid coupling, second through-hole (4) run through set up on horizontal pole (201), montant (202) with drive mechanism can dismantle the connection.
5. The multi-purpose laboratory assisted tightening and loosening tool of claim 4, wherein: the transmission mechanism comprises a transmission cylinder (10), wherein a first thread and a second thread are arranged in the transmission cylinder (10), and the first thread and the second thread are reversely and symmetrically arranged at two ends of the inner side wall of the transmission cylinder (10).
6. The multi-purpose laboratory assisted tightening and loosening tool of claim 5, wherein: the number of the threaded rods (2) is two, third threads are formed in the outer edge of the vertical rod (202) of one threaded rod (2), and the third threads are matched with the first threads; a fourth thread is arranged on the outer edge of the vertical rod (202) of the other threaded rod (2), and the fourth thread is matched with the second thread.
7. The multi-purpose laboratory assisted tightening and loosening tool of claim 6, wherein: a plurality of first screw holes (11) have all been seted up at transmission cylinder (10) both ends, any end of transmission cylinder (10) can be dismantled through the screw and be connected with intermediate part (15), fourth screw hole (14) have been seted up in intermediate part (15), fourth screw hole (14) pass through the screw with first screw hole (11) can be dismantled and be connected, the mould subassembly with intermediate part (15) can be dismantled and be connected.
8. The multi-purpose laboratory assisted tightening and loosening tool of claim 4, wherein: the transmission mechanism comprises a transmission cylinder (10), a first transverse plate (16) and a second transverse plate (17) are fixedly connected in the transmission cylinder (10), a first rotating shaft (18) is rotatably connected at the center position of the first transverse plate (16), a power gear (19) is fixedly connected at one end of the first rotating shaft (18), a plurality of second rotating shafts (20) are rotatably connected between the first transverse plate (16) and the second transverse plate (17), a first driven gear (21) and a second driven gear (22) are fixedly connected with the second rotating shaft (20), the first driven gear (21) is arranged at the top of the second driven gear (22), the power gear (19) is meshed with the first driven gear (21), a third rotating shaft (23) is rotatably connected at the center position of the second transverse plate (17), and a third driven gear (24) is fixedly connected with the third rotating shaft (23), the third driven gear (24) is meshed with the second driven gear (22), and the third rotating shaft (23) penetrates through and is in rotating connection with the bottom wall of the transmission cylinder (10).
9. The multi-purpose laboratory assisted tightening and loosening tool of claim 8, wherein: the vertical rod (202) is far away from one end of the transverse rod (201) and is provided with a second clamping hole (25), and the second clamping hole (25) is matched with the first rotating shaft (18).
10. The multi-purpose laboratory assisted tightening and loosening tool of claim 9, wherein: the third rotating shaft (23) is detachably connected with the die assembly.
CN202111306200.6A 2021-11-05 2021-11-05 Supplementary instrument of unscrewing of screwing up in multipurpose laboratory Pending CN113894750A (en)

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US6467379B1 (en) * 2001-08-21 2002-10-22 Simon Wizman Self-adjusting socket
CN1613613A (en) * 2003-11-04 2005-05-11 杨坤龙 Force enhancer of spanner
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