CN220690115U

CN220690115U - Automatic lifting and leveling device for total station

Info

Publication number: CN220690115U
Application number: CN202322414718.2U
Authority: CN
Inventors: 张欣
Original assignee: Yijinghe Science And Technology Tianjin Co ltd
Current assignee: Yijinghe Science And Technology Tianjin Co ltd
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2024-03-29
Anticipated expiration: 2033-09-06

Abstract

The application provides an automatic rising and falling tone level device of total powerstation belongs to total powerstation technical field. The automatic lifting and leveling device for the total station comprises a base assembly and a leveling assembly. The base assembly comprises a protection part, a function part and a support mounting base, wherein the function part is arranged in the protection part, when the base assembly is used, when the base assembly is required to be used for observing multiple directions, the first motor works to drive the total station main body to rotate, the direction of the total station main body is regulated, the total station main body is protected by the first box plate, the second box plate, the top cover and the rubber cushion together when the base assembly is not used, the total station main body is effectively prevented from being broken, the lifting leveling device does not need to move the whole device, the total station main body can be used for observing multiple directions, the height of the total station main body can be regulated flexibly, in addition, the total station main body can be automatically leveled, and better use experience is brought to a user.

Description

Automatic lifting and leveling device for total station

Technical Field

The application relates to the technical field of total stations, in particular to an automatic lifting and leveling device of a total station.

Background

The total station, namely the total station type electronic distance meter, is a high-technology measuring instrument integrating light, machine and electricity, and is a surveying instrument system integrating the functions of measuring horizontal angle, vertical angle, distance (inclined distance and flat distance) and height difference. Compared with an optical theodolite, the electronic theodolite changes the optical dial into a photoelectric scanning dial, and replaces manual optical micrometer reading with automatic recording and displaying reading, so that the angle measurement operation is simplified, and reading errors can be avoided. The total station is called because it can complete all the measurement work on the station by setting the instrument at one time. The method is widely applied to the fields of precision engineering measurement or deformation monitoring such as ground large-scale building and underground tunnel construction.

The existing total station is generally provided with a supporting frame, so that operators with different heights can use the total station, the total station cannot be well adjusted by the supporting frame when the total station is used, the operation is excessively complicated, the whole device needs to be moved when the total station is observed in multiple directions, great inconvenience is brought to a user, in addition, the ground large-scale building or underground tunnel construction site is often uneven, the operator is required to continuously adjust the supporting frame to adjust the levelness of the total station, bad use experience is brought to the user, and the total station capable of automatically lifting and lowering the adjustment level is provided.

Disclosure of Invention

In order to make up the above deficiency, this application provides automatic rising of total powerstation transfer level device, aim at improving current total powerstation and generally all can be equipped with a support frame, thereby satisfy the use of different height operators, and when using, just rely on the support frame alone can not be fine to the height of total powerstation adjust, the operation is too loaded down with trivial details, and sometimes need diversified when observing, whole device all need move, bring very big inconvenience for the user, in addition because the place of large-scale building on ground or underground tunnel construction often is uneven, so just need the continuous problem of adjusting the levelness of total powerstation of support frame of operator regulation.

The application is realized in such a way that:

the application provides an automatic rising and falling of total powerstation transfer level device, including basic subassembly and levelling subassembly.

The foundation assembly comprises a protection part, a function part and a bracket mounting base, wherein the function part is arranged in the protection part, and the bracket mounting base is arranged on the protection part.

The leveling assembly comprises an azimuth adjusting part, an angle adjusting part and a height adjusting part, wherein the azimuth adjusting part is arranged on the protection part, the angle adjusting part is arranged on the azimuth adjusting part, the height adjusting part is arranged on the angle adjusting part, and the functional part is arranged on the height adjusting part.

In an embodiment of the present application, the protection part includes bottom plate, first case board, second case board, hasp and top cap, first case board with the second case board is all articulated through the hinge be in on the bottom plate, the different parts of hasp are fixed respectively first case board with on the second case board, the difference the hasp is fixed respectively the top cap with on the outer wall of first case board, the difference the hasp is fixed respectively the top cap with on the outer wall of second case board, the support mounting base is fixed on the lower surface of bottom plate.

In one embodiment of the present application, the protection part further includes rubber cushions, and the different rubber cushions are respectively fixed on the outer walls of the first case plate, the second case plate and the top cover.

In one embodiment of the present application, the functional portion includes a total station body, a handheld portion, and a digital angle measuring instrument, the digital angle measuring instrument is fixed on an upper surface of the total station body, the total station body is disposed under the top cover, and the handheld portion is fixed on an outer wall of the total station body.

In one embodiment of the present application, the azimuth adjusting part includes a first motor and a first support plate, the first motor is fixed on an upper surface of the base plate, and an output shaft upper end of the first motor is fixed on a lower surface of the first support plate.

In an embodiment of the present application, the azimuth adjusting part includes an annular slide rail and an annular slide plate, the annular slide rail is provided with two, two the annular slide rail is fixed respectively between the upper surface of bottom plate and the lower surface of first backup pad, the annular slide plate rotates and sets up two on the annular slide rail.

In an embodiment of the application, angle adjusting part includes second backup pad, U template, connecting piece, electric jar, riser and connecting rod, the U template is fixed on the upper surface of first backup pad, the one end of connecting piece is fixed on the lower surface of second backup pad, the other end of connecting piece rotates to set up in the U template, the one end of connecting rod is fixed in the second backup pad, the other end of connecting rod rotates to set up on the outer wall of electric jar, the riser is fixed on the upper surface of first backup pad, the piston rod tip rotation of electric jar sets up on the riser.

In an embodiment of the present application, a through hole is formed in the second support plate, one end of the connecting rod is fixed in the through hole, and the electric cylinder is arranged in the through hole.

In an embodiment of the application, the height adjusting part includes lead screw, second motor, gear, first connecting plate, guide arm, second connecting plate and L template, the lower extreme of L template is fixed on the upper surface of second backup pad, the L template is provided with two, the tip rotation of lead screw sets up the upper surface of second backup pad and one of them on the lower surface of L template, the guide arm is fixed between the upper surface of second backup pad and another the lower surface of L template, the second motor is fixed on the upper surface of second backup pad, the output shaft of second motor with the lead screw passes through gear transmission is in the same place, first connecting plate thread bush is established on the lead screw, second connecting plate sliding sleeve is established on the guide arm, the one end of first connecting plate with the one end of second connecting plate is all fixed on the outer wall of total station appearance main part, the second motor the electrical cylinder with first motor all is in electrical connection together with the digital display angle measuring apparatu, the first connecting plate runs through with the L template.

In an embodiment of the present application, the angle adjusting part further includes a rotating member, two rotating members are provided, the two rotating members are respectively fixed on the upper surface of the second support plate and the lower surface of one of the L-shaped plates, and the end portion of the screw rod is rotatably disposed in the rotating member.

The beneficial effects of this application are: this application obtains the automatic rising of total powerstation levelling device through above-mentioned design, during the use, utilize the support mounting base to install the total powerstation main part on the support frame, in order to make the operator have a comfortable observation state, when needs rise to the total powerstation main part, open a part hasp, take off the top cap, open the quantity of hasp through the control, realize opening first boxboard or second boxboard, the second motor work drives gear drive and rotates, gear drive's rotation drives the lead screw and rotates, the total powerstation main part realizes reciprocating under the combined action of lead screw and guide arm, control the rotatory direction of second motor output shaft can adjust the height of total powerstation main part, digital display angle measuring apparatu monitors the levelness of total powerstation main part, when the total powerstation main part slope, digital display angle measuring apparatu gives the signal transmission to the electric jar, the flexible drive second backup pad of electric jar piston rod takes place the slope, realize leveling the total powerstation main part, when needs to observe the time measuring to the multiple azimuth, first motor work drives the total powerstation main part and rotates, realize carrying out the azimuth adjustment to the total powerstation main part, the total powerstation main part is difficult to use the rubber, the total powerstation main part is carried out under the combined action with the guide arm, the total powerstation main part can be adjusted, the total powerstation main part is convenient for the total powerstation, and the total powerstation is carried out the total powerstation, and the total powerstation is more convenient for the total powerstation main part, and the total powerstation is carried, and the total station main part is convenient to use, and has the total station main part to be put, and more convenient for the total station.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of an automatic rising and falling level device of a total station according to an embodiment of the present application;

fig. 2 is an exploded view of the automatic rising and falling level device of the total station according to the embodiment of the present application;

fig. 3 is a schematic perspective view of a protecting portion according to an embodiment of the present application;

fig. 4 is a schematic perspective view of a leveling assembly according to an embodiment of the present disclosure;

FIG. 5 is an enlarged view of area A of FIG. 4 provided in an embodiment of the present application;

fig. 6 is a diagram of the relationship between the second support plate and the connecting rod according to the embodiment of the present application.

In the figure: 100-a base component; 110-a guard; 111-a bottom plate; 112-a first box plate; 113-a second box plate; 114-hasp; 115-rubber cushion; 116-top cover; 120-a functional unit; 121-total station body; 122-a hand-held portion; 123-digital display angle measuring instrument; 130-a bracket mounting base; 200-leveling assembly; 210-an azimuth adjustment section; 211-an annular slide rail; 213-a first motor; 214-a first support plate; 215-annular slide plate; 220-an angle adjustment section; 221-a second support plate; 222-U-shaped plates; 223-connecting piece; 224-electric cylinder; 225-risers; 226-through holes; 227-a connecting rod; 230-a height adjustment; 231-screw rod; 232-a second motor; 233-a gear transmission; 234-a first connection plate; 235-guide rod; 236-a second connection plate; 237-rotating member; 238-L shaped plate.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present application.

Examples

Referring to fig. 1-6, the present application provides a technical solution: the automatic elevating and leveling device for the total station comprises a base assembly 100 and a leveling assembly 200.

The leveling assembly 200 is arranged on the foundation assembly 100, the total station main body 121 is installed on the supporting frame by utilizing the bracket installation base 130, in order to enable an operator to have a comfortable observation state, when the total station main body 121 is required to be lifted, a part of buckles 114 are opened, the top cover 116 is taken down, the number of the buckles 114 is controlled to be opened, the first box plate 112 or the second box plate 113 is opened, the second motor 232 works to drive the gear transmission piece 233 to rotate, the rotation of the gear transmission piece 233 drives the screw rod 231 to rotate, the total station main body 121 moves up and down under the combined action of the screw rod 231 and the guide rod 235, the rotating direction of the output shaft of the second motor 232 can be controlled, the height of the total station main body 121 can be adjusted, the digital display angle measuring instrument 123 monitors the levelness of the total station main body 121, when the total station main body 121 is inclined, the digital display angle measuring instrument 123 transmits signals to the electric cylinder 224, the second supporting plate 221 is driven to incline by the telescopic drive of the piston rod of the electric cylinder 224, the leveling of the total station main body 121 is realized, when the total station main body 121 is required to be detected, the total station main body 121 is driven to rotate, the total station main body 121 is required to rotate under the combined action of the screw rod, the total station main body 121 is required to be prevented from being adjusted, the total station main body 121 is required to be adjusted, and the total station main body 121 is not to be adjusted, and the total station main body 121 is required to be used to be adjusted, and automatically by the total station main body 121.

Referring to fig. 1-3, the base assembly 100 includes a protecting portion 110, a functional portion 120 and a support mounting base 130, the functional portion 120 is disposed in the protecting portion 110, the support mounting base 130 is disposed on the protecting portion 110, the protecting portion 110 includes a bottom plate 111, a first box plate 112, a second box plate 113, a buckle 114 and a top cover 116, the first box plate 112 and the second box plate 113 are hinged on the bottom plate 111 through hinge, different parts of the buckle 114 are respectively fixed on the first box plate 112 and the second box plate 113, different buckles 114 are respectively fixed on the top cover 116 and an outer wall of the first box plate 112, different buckles 114 are respectively fixed on the top cover 116 and an outer wall of the second box plate 113, the support mounting base 130 is fixed on a lower surface of the bottom plate 111, the first box plate 112, the second box plate 113 and the top cover plate 113 are respectively arranged to facilitate storage and protection of a total station main body 121, the protecting portion 110 includes a rubber cushion, the soft cushion is further fixed on the outer wall of the top cover 121, the top cover main body 122 is arranged to the top cover main body 122, the soft cushion is respectively, the soft cushion is arranged to prevent the soft cushion from being fixed on the outer wall of the top cover 121, and the top cover main body 122 is respectively, the soft cushion is arranged on the top cover main body 122, and the top cover main body 122 is respectively, and the soft cushion is respectively, the soft cushion is arranged on the top cover 122, and the soft cushion is 122 is fixed on the top cover 122.

Referring to fig. 2 and 4-6, the leveling assembly 200 includes an azimuth adjusting part 210, an angle adjusting part 220 and a height adjusting part 230, the azimuth adjusting part 210 is disposed on the guard part 110, the angle adjusting part 220 is disposed on the azimuth adjusting part 210, the height adjusting part 230 is disposed on the angle adjusting part 220, the function part 120 is disposed on the height adjusting part 230, the azimuth adjusting part 210 includes a first motor 213 and a first support plate 214, the first motor 213 is fixed on an upper surface of the base plate 111, an output shaft upper end of the first motor 213 is fixed on a lower surface of the first support plate 214, the first motor 213 is disposed to facilitate adjusting an azimuth of the first support plate 214, the azimuth adjusting part 210 includes an annular slide rail 211 and an annular slide plate 215, the annular slide rail 211 is provided with two, the two ring-shaped sliding rails 211 are respectively fixed between the upper surface of the bottom plate 111 and the lower surface of the first supporting plate 214, the ring-shaped sliding plate 215 is rotatably arranged on the two ring-shaped sliding rails 211, the ring-shaped sliding rails 211 and the ring-shaped sliding plate 215 are arranged to enable the first supporting plate 214 to rotate more stably, the angle adjusting part 220 comprises a second supporting plate 221, a U-shaped plate 222, a connecting piece 223, an electric cylinder 224, a riser 225 and a connecting rod 227, the U-shaped plate 222 is fixed on the upper surface of the first supporting plate 214, one end of the connecting piece 223 is fixed on the lower surface of the second supporting plate 221, the other end of the connecting piece 223 is rotatably arranged in the U-shaped plate 222, one end of the connecting rod 227 is fixed in the second supporting plate 221, the other end of the connecting rod 227 is rotatably arranged on the outer wall of the electric cylinder 224, the vertical plate 225 is fixed on the upper surface of the first support plate 214, the piston rod end of the electric cylinder 224 is rotatably disposed on the vertical plate 225, the electric cylinder 224 is disposed to facilitate the adjustment of the angle of the second support plate 221, a through hole 226 is formed in the second support plate 221, one end of the connecting rod 227 is fixed in the through hole 226, the electric cylinder 224 is disposed in the through hole 226, the through hole 226 is disposed to facilitate the rotation of the electric cylinder 224, the height adjusting part 230 comprises a screw rod 231, a second motor 232, a gear driving member 233, a first connecting plate 234, a guide rod 235, a second connecting plate 236 and an L-shaped plate 238, the lower end of the L-shaped plate 238 is fixed on the upper surface of the second support plate 221, the L-shaped plate 238 is provided with two, the end of the screw rod 231 is rotatably disposed on the upper surface of the second support plate 221 and the lower surface of one of the L-shaped plate 238, the guide rod 235 is fixed between the upper surface of the second support plate 221 and the lower surface of the other L-shaped plate 238, the second motor 232 is fixed on the upper surface of the second support plate 221, the output shaft of the second motor 232 and the screw rod 231 are connected together through the transmission of the gear transmission member 233, the first connecting plate 234 is sleeved on the screw rod 231 in a threaded manner, the second connecting plate 236 is sleeved on the guide rod 235 in a sliding manner, one end of the first connecting plate 234 and one end of the second connecting plate 236 are fixed on the outer wall of the total station body 121, the second motor 232, the electric cylinder 224 and the first motor 213 are electrically connected with the digital display angle measuring instrument 123, the first connecting plate 234 and the second connecting plate 236 penetrate through the L-shaped plate 238, the second motor 232 is arranged to facilitate the adjustment of the height of the total station body 121, the angle adjusting part 220 further includes two rotating members 237, the two rotating members 237 are respectively fixed on the upper surface of the second supporting plate 221 and the lower surface of one of the L-shaped plates 238, the end portion of the screw rod 231 is rotatably disposed in the rotating members 237, and the screw rod 231 is smoothly rotated due to the arrangement of the rotating members 237, and the rotating members 237 in this embodiment are bearings.

Specifically, the operating principle of the automatic rising and falling level device of the total station is as follows: when in use, the total station main body 121 is arranged on the supporting frame by utilizing the bracket mounting base 130, in order to enable an operator to have a comfortable observation state, when the total station main body 121 needs to be lifted, a part of buckles 114 are opened, the top cover 116 is removed, the first box plate 112 or the second box plate 113 is opened by controlling the quantity of the opened buckles 114, the second motor 232 works to drive the gear transmission member 233 to rotate, the rotation of the gear transmission member 233 drives the screw rod 231 to rotate, the total station main body 121 moves up and down under the combined action of the screw rod 231 and the guide rod 235, the rotating direction of the output shaft of the second motor 232 is controlled to adjust the height of the total station main body 121, the digital display angle measuring instrument 123 monitors the levelness of the total station main body 121, when the total station main body 121 is inclined, the digital display angle measuring instrument 123 transmits signals to the electric cylinder 224, the extension and contraction of the piston rod of the electric cylinder 224 drives the second supporting plate 221 to incline so as to level the total station main body 121, when the total station main body 121 needs to be observed in multiple directions, the first motor 213 works so as to drive the total station main body 121 to rotate, the direction of the total station main body 121 is regulated, when the total station main body 121 is not used, the first box plate 112, the second box plate 113, the top cover 116 and the rubber cushion 115 jointly protect the total station main body 121, the total station main body 121 is effectively prevented from being broken, the lifting and leveling device does not need to move the whole device, the total station main body 121 can be utilized to observe multiple directions, the height of the total station main body 121 can be regulated flexibly, in addition, the total station main body 121 can be automatically leveled, and better use experience is brought to a user.

It should be noted that, specific model specifications of the total station main body 121, the digital display angle measuring instrument 123, the first motor 213, the electric cylinder 224 and the second motor 232 need to be determined by selecting a model according to an actual specification of the device, and a specific model selection calculating method adopts a prior art in the art, so that detailed descriptions thereof are omitted.

The power supply of the total station body 121, the digital angle measuring instrument 123, the first motor 213, the electric cylinder 224, and the second motor 232, and the principle thereof will be apparent to those skilled in the art, and will not be described in detail herein.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Claims

1. Automatic elevating and leveling device of total station, which is characterized by comprising

A base assembly (100), the base assembly (100) comprising a guard (110), a functional portion (120) and a bracket mounting base (130), the functional portion (120) being disposed within the guard (110), the bracket mounting base (130) being disposed on the guard (110);

leveling assembly (200), leveling assembly (200) include position adjustment portion (210), angle adjustment portion (220) and high adjustment portion (230), position adjustment portion (210) set up on guard portion (110), angle adjustment portion (220) set up on position adjustment portion (210), high adjustment portion (230) set up on angle adjustment portion (220), functional portion (120) set up on high adjustment portion (230).

2. The automatic rising and lowering level device of a total station according to claim 1, wherein the guard portion (110) includes a bottom plate (111), a first case plate (112), a second case plate (113), a buckle (114) and a top cover (116), the first case plate (112) and the second case plate (113) are both hinged on the bottom plate (111) by hinge pages, different portions of the buckle (114) are respectively fixed on the first case plate (112) and the second case plate (113), different buckles (114) are respectively fixed on the top cover (116) and the outer wall of the first case plate (112), different buckles (114) are respectively fixed on the top cover (116) and the outer wall of the second case plate (113), and the bracket mounting base (130) is fixed on the lower surface of the bottom plate (111).

3. The automatic rising and falling level device of a total station according to claim 2, wherein the guard portion (110) further comprises rubber cushions (115), and different rubber cushions (115) are respectively fixed on the outer walls of the first case plate (112), the second case plate (113) and the top cover (116).

4. The automatic rising and falling level device of a total station according to claim 2, wherein the functional part (120) comprises a total station body (121), a hand-held part (122) and a digital display angle measuring instrument (123), the digital display angle measuring instrument (123) is fixed on the upper surface of the total station body (121), the total station body (121) is arranged under the top cover (116), and the hand-held part (122) is fixed on the outer wall of the total station body (121).

5. The automatic rising and falling level device of total station according to claim 4, wherein the azimuth adjusting part (210) comprises a first motor (213) and a first support plate (214), the first motor (213) is fixed on the upper surface of the base plate (111), and the upper end of the output shaft of the first motor (213) is fixed on the lower surface of the first support plate (214).

6. The automatic rising and falling leveling device for a total station according to claim 5, wherein the azimuth adjusting part (210) comprises two annular slide rails (211) and two annular slide plates (215), the two annular slide rails (211) are respectively fixed between the upper surface of the base plate (111) and the lower surface of the first support plate (214), and the annular slide plates (215) are rotatably arranged on the two annular slide rails (211).

7. The automatic rising and falling level device of a total station according to claim 5, wherein the angle adjusting part (220) comprises a second support plate (221), a U-shaped plate (222), a connecting piece (223), an electric cylinder (224), a riser (225) and a connecting rod (227), the U-shaped plate (222) is fixed on the upper surface of the first support plate (214), one end of the connecting piece (223) is fixed on the lower surface of the second support plate (221), the other end of the connecting piece (223) is rotatably arranged in the U-shaped plate (222), one end of the connecting rod (227) is fixed in the second support plate (221), the other end of the connecting rod (227) is rotatably arranged on the outer wall of the electric cylinder (224), the riser (225) is fixed on the upper surface of the first support plate (214), and the piston rod end of the electric cylinder (224) is rotatably arranged on the riser (225).

8. The automatic rising and falling leveling device for the total station according to claim 7, wherein a through hole (226) is formed in the second supporting plate (221), one end of the connecting rod (227) is fixed in the through hole (226), and the electric cylinder (224) is arranged in the through hole (226).

9. The automatic rising and lowering level device for total station according to claim 7, wherein said height adjusting portion (230) comprises a screw (231), a second motor (232), a gear transmission member (233), a first connecting plate (234), a guide rod (235), a second connecting plate (236) and an L-shaped plate (238), the lower end of said L-shaped plate (238) is fixed on the upper surface of said second supporting plate (221), said L-shaped plate (238) is provided with two, the end of said screw (231) is rotatably provided on the upper surface of said second supporting plate (221) and the lower surface of one of said L-shaped plates (238), said guide rod (235) is fixed between the upper surface of said second supporting plate (221) and the lower surface of the other of said L-shaped plates (238), the second motor (232) is fixed on the upper surface of said second supporting plate (221), the output shaft of said second motor (232) and said screw (231) are connected together by transmission through said gear transmission member (233), said first motor (234) is sleeved on the upper surface of said second connecting plate (236), said guide rod (236) is screwed on said first connecting plate (236), said guide rod (236) is fixed on said first end of said first connecting plate (121), said second motor (236) is screwed on said first end of said second connecting plate (236) The electric cylinder (224) and the first motor (213) are electrically connected with the digital display angle measuring instrument (123), and the first connecting plate (234) and the second connecting plate (236) penetrate through the L-shaped plate (238).

10. The automatic rising and falling level device of a total station according to claim 9, wherein the angle adjusting part (220) further comprises rotating members (237), the rotating members (237) are provided with two, the two rotating members (237) are respectively fixed on the upper surface of the second supporting plate (221) and the lower surface of one of the L-shaped plates (238), and the end parts of the screw rods (231) are rotatably arranged in the rotating members (237).