CN214845342U - Non-contact tachometer - Google Patents

Abstract

The utility model relates to a non-contact tachometer relates to the rotational speed measurement field, and it includes the instrument body, the instrument body includes first casing, still includes transfer assembly and drive arrangement, transfer assembly includes second casing, conveyer belt, transfer gear and pressure piece, second casing and first casing fixed connection, pressure piece one end rotates with the second casing to be connected, the other end is taken and is put on the conveyer belt, the transfer gear rotates with the second casing to be connected, the conveyer belt is connected with the transfer gear meshing, drive arrangement includes driving piece and power, the driving piece is used for driving the transfer gear and rotates, driving piece and power electric connection. This application has the effect that the tachometer reflection piece of being convenient for was taken and is carried.

Description

Non-contact tachometer

Technical Field

The application relates to the field of rotating speed measurement, in particular to a non-contact tachometer.

Background

The tachometer adopts a micro-processing circuit to store the maximum value, the minimum value and the final value in the speed measuring process in a memory on the basis of ensuring non-contact and high precision, and can be sequentially displayed on a liquid crystal display screen through a button switch.

Application No. 201822045960.6 discloses a non-contact tachometer, including the organism, the positive fixed mounting of organism has the display screen, and the middle part fixed mounting on organism top has the laser mouth, and the positive movable mounting of organism has the protection film that is located the display screen below. This non-contact tachometer through setting up distance sensor, siren, singlechip and signal receiver, and detection at any time is to the distance between laser mouth and the measured object, judges whether its distance accords with regulation numerical value, and the siren can remind operating personnel, realizes automatically carrying out the control to measuring distance.

In view of the above-mentioned related technologies, the inventor believes that the non-contact tachometer needs to be used in combination with a reflective member such as reflective paper, but the use of the reflective member is inconvenient, and the preparation work before measurement becomes cumbersome.

SUMMERY OF THE UTILITY MODEL

In order to improve the inconvenient problem of reflector taking, the application provides a non-contact tachometer.

The application provides a non-contact tachometer adopts following technical scheme:

the utility model provides a non-contact tachometer, includes the instrument body, the instrument body includes first casing, still includes transfer assembly and drive arrangement, transfer assembly includes second casing, conveyer belt, transfer gear and pressure piece, second casing and first casing fixed connection, pressure piece one end is rotated with the second casing and is connected, the other end is taken and is put on the conveyer belt, the transfer gear rotates with the second casing and is connected, the conveyer belt is connected with the transfer gear meshing, drive arrangement includes driving piece and power, the driving piece is used for driving the transfer gear and rotates, driving piece and power electric connection.

Through adopting above-mentioned technical scheme, when the reflection piece is taken to needs, the power provides power for the driving piece, and the driving piece drives the transfer gear and rotates, and the transfer gear drives the conveyer belt transmission, and the reflection piece hugs closely in the upper surface of conveyer belt under the effect of pressure piece, and under the effect of frictional force, the conveyer belt drives the reflection piece transmission, has increased the degree of automation of reflection piece conveying, makes taking of reflection piece more convenient.

Optionally, the portable handheld device further comprises a holding assembly, the holding assembly comprises a third shell and a rotating wheel, the third shell is fixedly connected with the first shell and communicated with the second shell, and the rotating wheel is rotatably connected with the third shell.

Through adopting above-mentioned technical scheme, when measuring, can hand the subassembly of gripping and operate, it is more comfortable to hold the use that the angle can make the instrument, and the reflection piece rolling is on the rotation wheel of the inside subassembly of gripping, and when the operation of conveying assembly, the rotation that rotates the wheel can be continuous provides the reflection piece, the carrying of the reflection piece of being convenient for, and has increased the memory space of reflection piece in the instrument.

Optionally, drive arrangement still includes control assembly, control assembly includes first wire, second wire and control switch, the one end and driving piece electric connection, the other end of first wire are equipped with first contact, the one end and power electric connection, the other end of second wire are equipped with the second contact, control switch includes button, connecting rod and contact piece, connecting rod and third casing sliding connection, connecting rod one end and button fixed connection, the other end and contact piece fixed connection, the contact piece is used for switching on first contact and second contact.

By adopting the technical scheme, when the reflecting piece needs to be taken and used, the button is pressed, the connecting rod pushes the contact piece to conduct the first contact and the second contact, the power supply is communicated with the driving piece, and the conveying assembly operates under the driving of the driving device; when the reflecting piece is not needed, the button is pulled out, the connecting rod drives the contact piece to be away from the first contact and the second contact, the driving piece loses the power source, the conveying wheel stops rotating, the conveying of the reflecting piece stops, and the controllable degree of the operation of the conveying assembly is increased.

Optionally, the control switch is elastically connected to the second housing.

Through adopting above-mentioned technical scheme, the button that has pressed pops out the reset automatically under the effect of elasticity, does not need artificial pulling out the button, makes control switch's use more convenient.

Optionally, the cutting device further comprises a cutting assembly, the cutting assembly comprises a first blade, a second blade and a blade shaft, the first blade is rotatably connected with the blade shaft, the second blade is rotatably connected with the blade shaft, and the blade shaft is fixedly connected with the second shell.

Through adopting above-mentioned technical scheme, after the reflection piece is sent out the second casing by transport assembly, can cut the reflection piece of required length through first blade and second blade, be convenient for tailor the reflection piece.

Optionally, the support device further comprises a fixing clip, and the fixing clip is detachably connected with the first shell.

Through adopting above-mentioned technical scheme, when the measuring head of instrument is aimed at and is pasted the reflection part on the determinand, be fixed in the support frame with the instrument through the fixation clamp on, can make the instrument more steady when aiming at the measurement, the people can be more laborsaving when using the instrument simultaneously.

Optionally, the pressure member is elastically and rotatably connected to the second housing.

Through adopting above-mentioned technical scheme, the effort increase of pressure piece to the reflection piece, the laminating degree of reflection piece and conveyer belt is higher, has increaseed the frictional force between reflection piece and the conveyer belt, makes the conveying subassembly more high-efficient to the conveying of reflection piece.

Optionally, the instrument body further comprises a display screen, the display screen is obliquely arranged on the first shell, and the display screen is fixedly connected with the first shell.

Through adopting above-mentioned technical scheme, button and display screen slope set up on the instrument body, can be convenient for operate the instrument and read data when the hand grips the subassembly hand.

Optionally, the second housing is provided with a first opening, the third housing is provided with a second opening, the portable electronic device further comprises a first cover and a second cover, the first cover is rotatably connected to the second housing, and the second cover is rotatably connected to the third housing.

By adopting the technical scheme, when parts such as the conveying assembly, the driving device, the reflecting piece and the like need to be maintained or replaced, the first cover body and the second cover body can be opened to carry out required operation, after the maintenance or the replacement is finished, the first cover body is covered to protect the parts in the second shell, and the second cover body is covered to protect the parts in the third shell.

Optionally, the holding assembly further includes a third cover body, and the third cover body is rotatably connected to the third housing.

Through adopting above-mentioned technical scheme, after the power electric quantity exhausts, can open the third lid and change the power, make the change of power more simple and convenient, alright reuse after the instrument changes the power.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the automation degree of taking the reflecting piece is enhanced, so that the taking of the reflecting piece is more convenient;

2. the rotating wheel is arranged in the instrument, so that the reflecting piece is more convenient to carry;

3. the control assembly can enable the controllability of the reflector during use to be higher;

4. the first opening and the second opening facilitate maintenance and replacement of the conveying assembly, the driving device and the reflecting piece.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic diagram of the structure of the transfer assembly, the gripping assembly and the reflector in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a driving device in an embodiment of the present application;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is a schematic diagram of a cropping assembly in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a supporting device in an embodiment of the present application.

Description of reference numerals: 1. an instrument body; 11. a first housing; 111. a first through hole; 112. a limiting groove; 12. an inclined plate; 121. a display screen; 13. a measuring head; 2. a transfer assembly; 21. a second housing; 211. a first open mouth; 212. a first groove; 213. a first protrusion; 214. a third through hole; 215. a first communication port; 216. a support frame; 217. a first limit plate; 218. a second limiting plate; 22. a first cover body; 23. a pressure member; 231. a torsion spring; 24. a conveyor belt; 25. a transfer wheel; 26. a first rotating frame; 3. a gripping assembly; 31. a third housing; 311. a second open mouth; 312. a second groove; 313. a second protrusion; 314. a second communication port; 315. a cavity; 316. a fourth via hole; 32. a second cover body; 33. a rotating wheel; 34. a third cover body; 341. a fixing sheet; 35. a second rotating frame; 4. a drive device; 41. a power source; 42. a control component; 421. a first conductive line; 4211. a first contact; 422. a second conductive line; 4221. a second contact; 423. a control switch; 4231. a button; 4232. a connecting rod; 4233. a contact piece; 4234. a first spring; 43. a drive member; 5. a cutting assembly; 51. a first blade; 52. a first tool holder; 521. a first baffle plate; 53. a second blade; 54. a second tool holder; 541. a second baffle plate; 55. a blade shaft; 56. a second spring; 6. a support device; 61. a fixing clip; 611. a raised strip; 62. a first telescopic rod; 621. positioning holes; 63. a second telescopic rod; 632. bolt holes; 64. positioning the bolt; 641. a screw; 642. a knob; 65. a support; 7. a reflective member.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a non-contact tachometer.

Referring to fig. 1 and 2, a non-contact tachometer includes an instrument body 1, a transfer assembly 2, a grip assembly 3, and a reflective member 7.

Referring to fig. 1 and 2, the instrument body 1 includes a first housing 11, a measuring head 13 and a tilt plate 12, the instrument body 1 is disposed along a horizontal direction, the measuring head 13 is in screw connection with one end of the first housing 11, the tilt plate 12 is located at an end of the first housing 11 far away from the measuring head 13, the tilt plate 12 tilts towards the measuring head 13 along a direction from bottom to top, a first through hole 111 is formed in the tilt plate 12, a display screen 121 is embedded in an inner wall of the first through hole 111, and the display screen 121 is connected with the first housing 11 through a screw.

Referring to fig. 1 and 2, the holding assembly 3 includes a third housing 31, a second cover 32, a rotating wheel 33 and a third cover 34, the third housing 31 is adhered to the bottom wall of the first housing 11 by glue, a second opening 311 is formed in a side wall of the third housing 31, and the second cover 32 is located at the second opening 311 and is hinged to an inner surface of a top wall of the third housing 31; the bottom wall of the third shell 31 is provided with a second groove 312, the second cover 32 is integrally provided with a hemispherical second protrusion 313, the second protrusion 313 is made of plastic and is located at one end of the second cover 32 far away from the first shell 11, and the second protrusion 313 is clamped with the second groove 312; a second communication port 314 is formed in one end of the third housing 31 close to the measuring head 13, a second rotating frame 35 is connected to a side wall of the third housing 31 far from the second communication port 314 through a screw, the rotating wheel 33 is rotatably connected with the second rotating frame 35, and the reflecting member 7 is made of reflective paper and is wound on a peripheral wall of the rotating wheel 33.

Referring to fig. 2 and 3, the conveying assembly 2 includes a second housing 21, a first cover 22, two pressure members 23, a conveyor belt 24 and two conveying wheels 25, the second housing 21 is adhered to the bottom wall of the first housing 11 by glue, one end of the third housing 31 away from the first housing 11 extends to one side of the second housing 21 away from the first housing 11, a first open port 211 is opened on the side wall of the second housing 21, the first open port 211 and the second open port 311 are located on the same plane, and the first cover 22 is located at the first open port 211 and hinged to the inner surface of the top wall of the second housing 21; the bottom wall of the second housing 21 is provided with a first groove 212, the first cover 22 is integrally provided with a hemispherical first protrusion 213, the first protrusion 213 is made of plastic and is located at one end of the first cover 22 away from the first housing 11, and the first protrusion 213 is clamped with the first groove 212.

Referring to fig. 2 and 3, one end of the second casing 21 away from the third casing 31 is provided with a third through hole 214, one end close to the third casing 31 is provided with a first communication port 215, and the first communication port 215 is communicated with the second communication port 314; the pressure piece 23 is an iron sheet, the pressure piece 23 inclines towards the third through hole 214 along the direction from top to bottom, one end of the pressure piece 23 is hinged to the top wall inside the second casing 21, the other end of the pressure piece is abutted to the conveyor belt 24, the hinge axis of the pressure piece 23 and the second casing 21 is arranged along the horizontal direction, a torsion spring 231 is arranged between the pressure piece 23 and the second casing 21, any side extension arm of the torsion spring 231 is welded to the pressure piece 23, the other side extension arm is abutted to the top wall inside the second casing 21, one end of the pressure piece 23 far away from the torsion spring 231 is lapped on the conveyor belt 24 under the action of gravity, and when the pressure piece 23 rotates towards the inner surface of the upper wall of the first casing 11 under the action of force, the torsion spring 231 can block the rotation of the pressure piece 23.

Referring to fig. 2 and 3, a first rotating frame 26 is arranged at one end of the inner wall of the second casing 21, which is provided with a third through hole 214, a transmission wheel 25 close to the third through hole 214 is rotatably connected with the first rotating frame 26, the rotation axis of the transmission wheel 25 is parallel to the rotation axis of the pressure member 23, the transmission belt 24 is wound between the two transmission wheels 25, and the transmission belt 24 is meshed with the transmission wheel 25; when the reflector 7 is taken out, one end of the reflector 7 extends out of the third shell 31 from the rotating wheel 33 to the inside of the second shell 21, the reflector 7 in the second shell 21 is located between one end, away from the upper wall of the first shell 11, of the pressure piece 23 and the conveyor belt 24, the pressure piece 23 is abutted against the reflector 7, the reflector 7 is attached to the conveyor belt 24, and the size of the third through hole 214 allows the reflector 7 to be conveyed out of the second shell 21.

Referring to fig. 3 and 4, the driving device 4 is further included, the driving device 4 includes a driving member 43, a control assembly 42 and a power source 41, the driving member 43 is a motor, a supporting frame 216 is connected to the lower wall inside the second housing 21 through a screw, the driving member 43 is fixed on the supporting frame 216 through a screw, and an output shaft of the driving member 43 is coupled to the rotating wheel 33 far away from the third through hole 214 through a coupling; the control assembly 42 includes a first wire 421, a second wire 422 and a control switch 423, wherein one end of the first wire 421 is electrically connected to the driving member 43, the other end is electrically connected to the first contact 4211, one end of the second wire 422 is electrically connected to the power source 41, and the other end is electrically connected to the second contact 4221; the control switch 423 comprises a button 4231, a connecting rod 4232, a contact piece 4233 and a first spring 4234, a fourth through hole 316 is formed in the side wall of the third shell 31 where the second communicating port 314 is located, the connecting rod 4232 is an insulating rod and is in sliding connection with the inner wall of the fourth through hole 316, one end of the connecting rod 4232 is located in the third shell 31, the other end of the connecting rod 4232 extends out of the third shell 31, one end of the connecting rod 4232 located in the third shell 31 is bonded with the contact piece 4233 through glue, the other end of the connecting rod 4232 is connected with the button 4231 through a screw, the contact surface of the first contact 4211 and the contact surface of the second contact 4221 are located on the same horizontal plane and are parallel to the contact surface of the contact piece 4233, the connecting rod 4232 is sleeved in the first spring 4234, one end of the first spring 4234 is abutted against the button 4231, the other end of the first spring 4234 is abutted against the third shell 31, when the first spring 4234 is in a compressed state, the contact piece 4233 turns on the first contact 4211 and the second contact 4221; a cavity 315 is formed in one end of the third casing 31 far away from the first casing 11, the third cover 34 is disposed at the cavity 315 and hinged to an inner wall of the cavity 315, a fixing plate 341 is hinged to an outer wall of the third cover 34 far away from the cavity 315, a hinge axis of the fixing plate is perpendicular to that of the third cover 34, the power source 41 is a battery, and the power source 41 is disposed in the cavity 315.

Referring to fig. 5 and 6, the cutting assembly 5 includes a first blade 51, a first handle 52, a second blade 53, a second handle 54, a blade shaft 55, and a second spring 56; the blade shaft 55 is located on one side, away from the first opening 211, of the third through hole 214 and connected to the second shell 21 through a screw, the first hilt 52 and the second hilt 54 are both rotatably connected to the blade shaft 55, a first blocking piece 521 is welded on the first hilt 52, a second blocking piece 541 is welded on the second hilt 54, one end of the second spring 56 is welded to the first blocking piece 521, and the other end of the second spring is welded to the second blocking piece 541; the first blade 51 is positioned on one side of the third through hole 214 close to the first shell 11, the first blade 51 is welded with one side of the first knife handle 52 close to the third through hole 214, the second blade 53 is positioned on one side of the third through hole 214 far away from the first shell 11, and the second blade 53 is welded with one side of the second knife handle 54 close to the third through hole 214; the second housing 21 is integrally provided with a first limit plate 217 and a second limit plate 218, and when the second spring 56 is in a normal state, one side of the first blade 51 away from the third through hole 214 abuts against the first limit plate 217, and one side of the second blade 53 away from the third through hole 214 abuts against the second limit plate 218.

Referring to fig. 6, the supporting device 6 includes a fixing clip 61, a first telescopic rod 62, a second telescopic rod 63, a positioning bolt 64 and a bracket 65, a rectangular limiting groove 112 is formed on the side wall of the first housing 11, the fixing clip 61 is U-shaped, rectangular protruding strips 611 are integrally connected to the surfaces of the two side walls of the fixing clip 61 close to each other, the protruding strips 611 are matched with the limiting groove 112, and the protruding strips 611 slide in the limiting groove 112; the fixing clamp 61 is connected with the first telescopic rod 62 through a screw, the first telescopic rod 62 is sleeved in the second telescopic rod 63, the first telescopic rod 62 is provided with a plurality of positioning holes 621, one end of the second telescopic rod 63 is provided with a bolt hole 632, the size of the bolt hole 632 is the same as that of the positioning holes 621, the positioning bolt 64 comprises a screw 641 and a knob 642, the screw 641 is connected with the inner wall of the bolt hole 632 in a sliding manner, one end of the screw 641 is located outside the second telescopic rod 63, the other end of the screw 641 is located in the second telescopic rod 63 and extends through one of the positioning holes 621, the knob 642 is welded with one end of the screw 641 located outside the second telescopic rod 63, and one end of the second telescopic rod 63, which is far away from the positioning bolt 64, is connected with the bracket 65 through a screw.

The implementation principle of the implementation is as follows: when the reflector 7 needs to be taken out, the third shell 31 is held by hand, the button 4231 is pressed, the button 4231 pushes the connecting rod 4232 to move towards the inside of the third shell 31, at the moment, the first spring 4234 is in a compressed state, the connecting rod 4232 pushes the contact piece 4233 to be communicated with the first contact head 4211 and the second contact head 4221, the first lead 421 is communicated with the second lead 422, the power supply 41 supplies power to the driving piece 43, the driving piece 43 drives the transmission wheel 25 to rotate, the transmission wheel 25 drives the transmission belt 24 to transmit, one end of the reflector 7 is wound on the peripheral wall of the rotation wheel 33, the other end of the reflector 7 is positioned on the transmission belt 24, under the action of the pressure piece 23, the reflector 7 is tightly attached to the upper surface of the transmission belt 24, the transmission belt 24 moves to transmit the reflector 7 out of the second shell 21 through the third through hole 214, when the required reflector 7 is enough, the button 4231 is released, and under the action of the elastic force of the first spring 4234, the contact piece 4233 is separated from the first contact head 4211 and the second contact head 4221, the driving piece 43 loses the power supply 41, the transmission assembly 2 stops transmitting, and the reflecting piece 7 is not transmitted out of the second shell 21 any more; the first knife handle 52 and the second knife handle 54 are pressed, the first knife handle 52 and the second knife handle 54 drive the first knife blade 51 and the second knife blade 53 to move, the reflecting element 7 conveyed out of the second shell 21 is cut, after the cutting operation, the first knife blade 51 and the second knife blade 53 are reset under the action of the second spring 56, the first limiting plate 217 and the second limiting plate 218 limit the knife blades, and the random rotation degree of the knife blades in a normal state of the second spring 56 is reduced.

The cut reflecting piece 7 is attached to an object to be measured, an instrument is opened, a measuring head 13 is aligned to the reflecting piece 7 for measurement, and a display screen 121 on the inclined plate 12 can facilitate reading of data during measurement; when long-time measurement is needed, the first telescopic rod 62 and the second telescopic rod 63 are adjusted to the needed height through the positioning bolts 64, the instrument is connected to the fixing clamp 61 through the limiting groove 112 and then aligned to the reflecting piece 7 on the object to be measured, and the supporting device 6 can replace manpower to support the instrument for measurement; when the parts such as the conveying assembly 2, the driving device 4 and the reflection member 7 need to be maintained or replaced, the first cover 22 and the second cover 32 can be opened to perform required operations, and when the maintenance or replacement is completed, the first cover 22 and the second cover 32 can be closed to protect the internal parts.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A non-contact tachometer comprising an instrument body (1), the instrument body (1) comprising a first housing (11), characterized in that: still include transfer module (2) and drive arrangement (4), transfer module (2) include second casing (21), conveyer belt (24), transfer gear (25) and pressure piece (23), second casing (21) and first casing (11) fixed connection, pressure piece (23) one end is rotated with second casing (21) and is connected, the other end is taken on conveyer belt (24), transfer gear (25) are rotated with second casing (21) and are connected, conveyer belt (24) are connected with transfer gear (25) meshing, drive arrangement (4) are including driving piece (43) and power (41), driving piece (43) are used for driving transfer gear (25) and rotate, driving piece (43) and power (41) electric connection.

2. A non-contact tachometer according to claim 1, wherein: the novel multifunctional electric wrench is characterized by further comprising a holding assembly (3), wherein the holding assembly (3) comprises a third shell (31) and a rotating wheel (33), the third shell (31) is fixedly connected with the first shell (11) and communicated with the second shell (21), and the rotating wheel (33) is rotatably connected with the third shell (31).

3. A non-contact tachometer according to claim 2, wherein: the driving device (4) further comprises a control assembly (42), the control assembly (42) comprises a first lead (421), a second lead (422) and a control switch (423), one end of the first lead (421) is electrically connected with the driving piece (43), the other end of the first lead is provided with a first contact head (4211), one end of the second lead (422) is electrically connected with the power supply (41), the other end of the second lead is provided with a second contact head (4221), the control switch (423) comprises a button (4231), a connecting rod (4232) and a contact piece (4233), the connecting rod (4232) is slidably connected with the third shell (31), one end of the connecting rod (4232) is fixedly connected with the button (4231), the other end of the connecting rod is fixedly connected with the contact piece (4233), and the contact piece (4233) is used for conducting the first contact head (4211) and the second contact head (4221).

4. A non-contact tachometer according to claim 3, wherein: the control switch (423) is elastically connected to the second housing (21).

5. The non-contact tachometer of claim 4, wherein: still including cutting out subassembly (5), cutting out subassembly (5) includes first blade (51), second blade (53) and blade axle (55), first blade (51) and blade axle (55) rotate to be connected, second blade (53) and blade axle (55) rotate to be connected, blade axle (55) and second casing (21) fixed connection.

6. The non-contact tachometer of claim 5, wherein: the support device (6) comprises a fixing clamp (61), and the fixing clamp (61) is detachably connected with the first shell (11).

7. A non-contact tachometer according to claim 1, wherein: the pressure piece (23) is elastically and rotatably connected with the second shell (21).

8. A non-contact tachometer according to claim 1, wherein: the instrument body (1) further comprises a display screen (121), the display screen (121) is obliquely arranged on the first shell (11), and the display screen (121) is fixedly connected with the first shell (11).

9. A non-contact tachometer according to claim 2, wherein: the novel multifunctional portable electronic device is characterized in that a first opening (211) is formed in the second shell (21), a second opening (311) is formed in the third shell (31), the novel multifunctional electronic device further comprises a first cover body (22) and a second cover body (32), the first cover body (22) is rotatably connected with the second shell (21), and the second cover body (32) is rotatably connected with the third shell (31).

10. A non-contact tachometer according to claim 2, wherein: the holding assembly (3) further comprises a third cover body (34), and the third cover body (34) is rotatably connected with the third shell (31).

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