CN219629159U - Armrest capable of being adjusted automatically according to user demands - Google Patents

Abstract

The utility model provides an armrest capable of being adjusted automatically according to user demands, which comprises an armrest panel assembly, an angle rotating assembly and a telescopic armrest handle assembly, wherein the armrest panel assembly is rotatably installed on the telescopic armrest handle assembly through the angle rotating assembly, and the angle rotating assembly is fixedly installed on the telescopic armrest handle assembly. The structure of the utility model uses a great deal of mechanical structure principles, is firm and durable, and greatly meets the functional requirements of different users by multifunctional synchronous adjustment; the mechanism has the mechanical scientific and technological design principle, is reasonable in structure, is firm and durable, can be well controlled in the aspects of manufacturing and quality control, and meets the high-quality requirements of market users. On the premise of ensuring the functions, the method is simpler, more convenient, smoother and more textured in user experience.

Description

Armrest capable of being adjusted automatically according to user demands

Technical Field

The utility model belongs to the technical field of armrests, and particularly relates to an armrests capable of being adjusted automatically according to user requirements.

Background

After the point of view of the ergonomic chair is put forward, as the ergonomic chair is studied more and more deeply, the armrests are one of the most important parts of the swivel chair, the swivel chair has higher requirements on the functions and the use effects of the armrests, the traditional armrests have single functions, are hard to operate, are not simple enough, and have poor experience, so that the requirements of users can not be met effectively.

Therefore, it is necessary to provide an armrest that can be adjusted autonomously according to the needs of the user.

Disclosure of Invention

In order to solve the technical problems, the utility model provides an armrest capable of being automatically adjusted according to the requirements of a user, which comprises an armrest panel assembly, an angle rotating assembly and a telescopic armrest handle assembly, wherein the armrest panel assembly is rotatably arranged on the telescopic armrest handle assembly through the angle rotating assembly, and the angle rotating assembly is fixedly arranged on the telescopic armrest handle assembly;

the handrail panel assembly comprises a rotary functional piece, a handrail bottom cover, a handrail panel, a four-way sliding piece, a gear spring, a gear shifting piece, a secondary rotary functional piece and a countersunk screw, wherein a stud boss is fixedly arranged at the center above the rotary functional piece, the stud boss of the rotary functional piece slides through the handrail bottom cover and sequentially passes through the four-way sliding piece and the secondary rotary functional piece to be in threaded installation with the countersunk screw, a handrail panel is fixedly buckled on the handrail bottom cover, an annular notch is formed in the handrail bottom cover, the four-way sliding piece is slidably arranged in the handrail bottom cover, two groups of gear springs are arranged on the four-way sliding piece, the gear shifting pieces are fixedly arranged at the two ends of the gear springs, and the gear shifting pieces are provided with two groups; a transverse groove is formed in one side of the four-way sliding piece, a funnel-shaped groove is formed in the middle of the four-way sliding piece, the two sets of gear shifting pieces are elastically installed in the transverse groove and the funnel-shaped groove of the four-way sliding piece through gear springs, gear groove groups are arranged on grooves formed in the four-way sliding piece and the handrail bottom cover, the gear groove groups are matched with the gear shifting pieces, the two-stage rotating functional piece is diamond-shaped, the two-stage rotating functional piece is installed in the funnel-shaped groove of the four-way sliding piece in a matched mode, a set of gear shifting pieces and a set of gear springs are limited in the two-stage rotating functional piece, triangular grooves are formed in the upper surface of the two-stage rotating functional piece, corresponding triangular protrusions are arranged on the inner side inner wall of the handrail panel, the triangular grooves and the triangular protrusions are mutually matched, and a plurality of triangular protrusions are arranged on the inner side wall of the handrail panel in a straight line mode; the rotating functional piece is rotatably provided with an angle rotating component.

Preferably, the angle rotating assembly comprises a horizontal rotating functional piece, a gear bumping ball, a multiple-energy pressing block, a cylindrical screw, a reset clamp spring, a rotating fixing shaft pin, a rotating inner shaft body, a gear clamp spring and a gear steel sheet, wherein the gear bumping ball is adaptively clamped at the bottom of the lower part of the horizontal rotating functional piece, the cylindrical screw penetrates through the center of the horizontal rotating functional piece and is installed together with the central thread of the multiple-energy pressing block, a groove matched with the gear bumping ball is formed in the multiple-energy pressing block, and the multiple-energy pressing block is fixedly installed on the telescopic handrail assembly through a bolt; the reset clamp spring is clamped and fixed on the rotary fixing shaft pin, the rotary fixing shaft pin penetrates through the horizontal rotary functional piece and the rotary inner shaft body, the reset clamp spring on the rotary fixing shaft pin is fixedly connected with the rotary inner shaft body, the gear clamp spring is clamped and matched in two sides of the rotary inner shaft body, the gear steel sheet matched with the gear clamp spring is clamped and fixed in two sides of the horizontal rotary functional piece, the outside of the horizontal rotary functional piece is matched into a groove below the rotary functional piece, the rotary functional piece is used for installing the horizontal rotary functional piece together through the chamfering screw, the threaded cloak cover is arranged on the outside of the rotary functional piece, and the cloak decorative cover is arranged on the joint outside of the rotary functional piece and the horizontal rotary functional piece.

Preferably, the telescopic handrail handle component comprises a lifting outer cover, a lifting sliding pipe, a sliding wear-resistant piece, a lifting gear box, a lifting gear clamp, a reset spring and a button, wherein the lifting sliding pipe is clamped in the lifting outer cover, the sliding wear-resistant piece is fixed on two sides above the lifting sliding pipe, the lifting gear box is slidably installed in the lifting sliding pipe, the lifting gear clamp is installed in the lifting gear box, the reset spring is clamped on an upright post above the lifting gear clamp, and the button passes through the lifting outer cover, the lifting sliding pipe and the lifting gear box to be clamped on the lifting gear clamp; the gear clamp spring is fixedly mounted above the lifting outer cover, the lifting sliding tube is provided with a buckle notch, the lifting gear box is provided with a buckle matched with the buckle notch formed in the lifting sliding tube, and the lifting gear clamp is rotatably mounted in the lifting gear box.

Compared with the prior art, the utility model has the following beneficial effects:

the multifunctional handrail can realize lifting, two-stage horizontal rotation, vertical rotation and front-back adjustment, the structure applies a great deal of mechanical structure principles, the structure is firm and durable, and the multifunctional synchronous adjustment greatly meets the functional requirements of different users; the mechanism has the mechanical scientific and technological design principle, is reasonable in structure, is firm and durable, can be well controlled in the aspects of manufacturing and quality control, and meets the high-quality requirements of market users. On the premise of ensuring the functions, the method is simpler, more convenient, smoother and more textured in user experience.

Drawings

Fig. 1 is a schematic view of the assembled structure of the present utility model.

Fig. 2 is a schematic view of the exploded construction of fig. 1 according to the present utility model.

Fig. 3 is a schematic view of a partial enlarged structure at a of fig. 2 according to the present utility model.

Fig. 4 is a schematic view of a partially enlarged structure of fig. 2B according to the present utility model.

Fig. 5 is a schematic view of a partially enlarged structure of fig. 2C according to the present utility model.

Fig. 6 is a schematic view of the present utility model mounted on a seat.

In the figure:

the armrest panel assembly 1, the rotary functional piece 11, the armrest bottom cover 12, the armrest panel 13, the four-way sliding piece 14, the gear spring 15, the gear shifting piece 16, the two-stage rotary functional piece 17, the countersunk head screw 18, the angle rotary assembly 2, the horizontal rotary functional piece 21, the gear ball 22, the multiple energy pressing block 23, the cylindrical screw 24, the reset clamp spring 25, the rotary fixing shaft pin 26, the rotary inner shaft body 27, the gear clamp spring 28, the gear steel sheet 29, the telescopic armrest handle assembly 3, the lifting outer cover 31, the lifting sliding tube 32, the sliding wear piece 33, the lifting gear box 34, the lifting gear clamp 35, the reset spring 36 and the button 37.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution of the embodiments of the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

In the description of the embodiments, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 6:

the utility model provides an armrest capable of being automatically adjusted according to user requirements, which comprises an armrest panel assembly 1, an angle rotating assembly 2 and a telescopic armrest handle assembly 3, wherein the armrest panel assembly 1 is rotatably arranged on the telescopic armrest handle assembly 3 through the angle rotating assembly 2, the angle rotating assembly 2 is fixedly arranged on the telescopic armrest handle assembly 3, the armrest panel assembly 1 comprises a rotating functional piece 11, an armrest bottom cover 12, an armrest panel 13, a four-way sliding piece 14, a gear spring 15, a gear shifting piece 16, a second-stage rotating functional piece 17 and a countersunk head screw 18, a stud boss is fixedly arranged in the center above the rotating functional piece 11, the stud boss of the rotating functional piece 11 slides through the armrest bottom cover 12 and sequentially passes through the four-way sliding piece 14 and the second-stage rotating functional piece 17 to be in threaded connection with the countersunk head screw 18, the armrest bottom cover 12 is fixedly buckled with an armrest panel 13, an annular notch is formed in the armrest bottom cover 12, the four-way sliding piece 14 is slidably arranged on the armrest bottom cover 12, two groups of gear springs 15 are totally arranged on the four-way sliding piece 14, two ends of the gear spring 15 are fixedly provided with gear shifting pieces 16, and the two groups of gear shifting pieces 16 are respectively arranged; a transverse groove is formed in one side of the four-way sliding piece 14, a funnel-shaped groove is formed in the middle of the four-way sliding piece 14, two groups of gear shifting pieces 16 are elastically installed in the transverse groove and the funnel-shaped groove of the four-way sliding piece 14 through gear springs 15, gear groove groups are respectively arranged on grooves formed in the four-way sliding piece 14 and the handrail bottom cover 12, the gear groove groups are matched with the gear shifting pieces 16, the two-stage rotating functional piece 17 is in a diamond shape, the two-stage rotating functional piece 17 is adaptively installed in the funnel-shaped groove of the four-way sliding piece 14, a group of gear shifting pieces 16 and a group of gear springs 15 are limited in the funnel-shaped groove, a triangular groove is formed in the upper surface of the two-stage rotating functional piece 17, corresponding triangular protrusions are arranged on the inner side inner wall of the handrail panel 13, the triangular grooves and the triangular protrusions are mutually matched, and a plurality of triangular protrusions are arranged on the inner side inner wall of the handrail panel 13 in a straight line manner; the rotation function member 11 is rotatably provided with the angle rotation assembly 2.

Embodiment one:

specifically, the angle rotating assembly 2 comprises a horizontal rotating functional piece 21, a gear collision bead 22, a multiple-power pressing block 23, a cylindrical screw 24, a reset clamp spring 25, a rotating fixing shaft pin 26, a rotating inner shaft body 27, a gear clamp spring 28 and a gear steel sheet 29, wherein the gear collision bead 22 is adaptively clamped at the bottom of the lower part of the horizontal rotating functional piece 21, the cylindrical screw 24 penetrates through the center of the horizontal rotating functional piece 21 and is installed together with the central thread of the multiple-power pressing block 23, a groove matched with the gear collision bead 22 is formed in the multiple-power pressing block 23, and the multiple-power pressing block 23 is fixedly installed on the telescopic handrail assembly 3 through bolts; the reset clamp spring 25 is clamped and fixed on the rotation fixing shaft pin 26, the rotation fixing shaft pin 26 penetrates through the horizontal rotation functional piece 21 and the rotation inner shaft body 27, the reset clamp spring 25 on the rotation fixing shaft pin 26 is fixedly connected with the rotation inner shaft body 27, the gear clamp springs 28 are clamped and fitted in the two sides of the rotation inner shaft body 27, the gear steel sheets 29 matched with the gear clamp springs 28 are clamped and fixed in the two sides of the horizontal rotation functional piece 21, the outer part of the horizontal rotation functional piece 21 is fitted into a groove below the rotation functional piece 11, the rotation functional piece 11 is used for installing the horizontal rotation functional piece 21 together through a chamfering screw, a threaded shielding cover is arranged on the outer side of the rotation functional piece 11, and a shielding decorative cover is arranged on the outer side of the connection of the rotation functional piece 11 and the horizontal rotation functional piece 21.

Specifically, the telescopic handrail handle assembly 3 comprises a lifting outer cover 31, a lifting sliding pipe 32, a sliding wear-resistant piece 33, a lifting gear box 34, a lifting gear clamp 35, a reset spring 36 and a button 37, wherein the lifting sliding pipe 32 is clamped in the lifting outer cover 31, the sliding wear-resistant piece 33 is fixed on two sides above the lifting sliding pipe 32, the lifting gear box 34 is slidably arranged in the lifting sliding pipe 32, the lifting gear clamp 35 is arranged in the lifting gear box 34, the reset spring 36 is clamped on an upright column above the lifting gear clamp 35, and the button 37 passes through the lifting outer cover 31, the lifting sliding pipe 32 and the lifting gear box 34 to be clamped on the lifting gear clamp 35; gear clamp springs 28 are fixedly mounted above the lifting outer cover 31, buckle notches are formed in the lifting sliding tube 32, buckles matched with the buckle notches formed in the lifting sliding tube 32 are arranged on the lifting gear box 34, and lifting gear clamps 35 are rotatably mounted in the lifting gear box 34.

Embodiment two:

the first step: the four-way sliding piece 14 is placed in the middle groove of the armrest bottom cover 12, a group of gear shifting pieces 16 are placed in the corresponding transverse grooves of the four-way sliding piece 14, a group of gear springs 15 are clamped and installed on the gear shifting pieces 16, the other set of gear springs 15 is then snapped into place on the gear shifter 16 at both ends and positioned onto the secondary rotary function 17, which, at this time, the secondary rotation function member 17 is inserted into the four-way slide member 14 from the top, and finally, after the screw boss of the rotation function member 11 passes through the armrest bottom cover 12, is caught in the groove of the secondary rotation function member 17, and is mounted to the screw boss of the rotary function member 11 through the countersunk head screw 18 from the middle hole of the secondary rotary function member 17, and after the above-mentioned mounting is completed, the armrest bottom cover 12 and the armrest panel 13 are integrated, when the armrest bottom cover 12 and the armrest panel 13 are moved horizontally, the armrest bottom cover 12 and the armrest panel 13 are restrained by a set of gear springs 15 and gear dials 16 in the lateral grooves, and is influenced by the spring force, gear rattle occurs in the gear shifter 16 during the movement, secondly, when the secondary rotation is needed, the triangular protrusions on the inner side of the handrail panel 13 are clamped in the triangular grooves corresponding to the secondary rotation functional pieces 17, because the surfaces of two sides of the triangular groove are planes (the other two sides are inclined planes, so that the triangular groove and the triangular bulge cannot move in the horizontal movement process), the triangular groove and the triangular bulge are matched with each other to drive the secondary rotation functional part 17, the secondary rotation functional part 17 drives the other group of gear springs 15 and gear shifting parts 16 on the inner side of the other group, the gear shifting parts 16 are also influenced by spring force, and gear sound can occur on the gear shifting parts 16, so that the components can complete the horizontal transverse movement function and the secondary rotation function;

and a second step of: the lifting gear box 34 is inserted into the lifting gear box from the top of the lifting sliding pipe 32, the sliding wear-resistant piece 33 is respectively installed on the lifting sliding pipe 32 from the side, the lifting gear clamp 35 is inserted and rotatably installed in the lifting gear box 34, at the moment, the installed components (the lifting sliding pipe 32, the sliding wear-resistant piece 33, the lifting gear box 34 and the lifting gear clamp 35) are inserted into the lifting outer cover 31 from the top, then the button 37 is pressed to the lifting gear clamp 35, the reset spring 36 is inserted into a positioning column on the lifting gear clamp 35, the multiplexing energy pressing block 23 is installed on the lifting outer cover 31 to be fixed by using a countersunk screw, and then the gear spring bead 22 is installed on the horizontal rotation functional piece 21 from the bottom of the horizontal rotation functional piece 21; finally, the installed assembly is inserted into the horizontal rotation functional piece 21 from the corresponding hole at the bottom of the horizontal rotation functional piece 21, and is installed onto the multiplex energy pressing block 23 from the top of the horizontal rotation functional piece 21 by using the cylindrical screw 24, after the installation is finished, the up-and-down lifting function can be realized, a user presses the button 37, the button 37 is internally arranged in the lifting outer cover 31 and drives the lifting gear card 35 to be separated from the limit, the reset spring 36 of the lifting gear card 35 does not limit the lifting gear box 34 by elasticity any more, the user pulls the whole body to be taken out of the lifting gear box 34, and after the lifting gear box 34 is lifted to a certain height, the buckle of the lifting gear box 34 is matched with the buckle socket of the lifting sliding pipe 32, so that the whole lifting of the handrail is finished;

and a third step of: the gear clamp spring 28 is pressed into a groove of the rotating inner shaft body 27 from two sides respectively, the installed assembly is installed into a middle groove of the horizontal rotating functional piece 21, then the rotating fixed shaft pin 26 penetrates through the horizontal rotating functional piece 21 and the rotating inner shaft body 27 respectively, the reset clamp spring 25 is clamped into the rotating fixed shaft pin 26 and the rotating inner shaft body 27 respectively, the gear clamp spring 28 is clamped into the horizontal rotating functional piece 21 from the side face, the installed whole assembly is placed into a groove at the bottom of the rotating functional piece 11 finally, the trimming screw is used for installing the rotating fixed shaft pin 26 from the outer side of the rotating functional piece 11, the threaded decorative cover is installed into a side face hole on the rotating functional piece 11, and then the shielding decorative cover is installed onto the rotating functional piece 11 through 2 screws; after the assembly or the installation is completed, when the user breaks the armrest panel assembly 1, the rotating functional piece 11 of the armrest panel assembly 1 rotates outside the horizontal rotating functional piece 21 and the rotating inner shaft body 27, at this time, the gear clamp spring 28 collides with the gear steel sheet 29 and generates gear sound, in addition, when the horizontal primary rotation is required, the horizontal rotating functional piece 21 rotates on the multiplexing energy pressing block 23, in the rotating process, the gear collision bead 22 collides with the groove of the multiplexing energy pressing block 23, so that gear sound is generated, and the lifting, the secondary horizontal rotation, the vertical rotation and the front-back adjustment of the multifunctional armrest can be realized after all the installation is completed, and the adjustment can be performed in multiple directions.

By utilizing the technical scheme of the utility model or under the inspired by the technical scheme of the utility model, a similar technical scheme is designed by a person skilled in the art, so that the technical effects are achieved, and the technical scheme falls into the protection scope of the utility model.

Claims (3)

1. The handrail capable of being adjusted automatically according to user requirements is characterized by comprising a handrail panel assembly (1), an angle rotating assembly (2) and a telescopic handrail handle assembly (3), wherein the handrail panel assembly (1) is rotatably arranged on the telescopic handrail handle assembly (3) through the angle rotating assembly (2), and the angle rotating assembly (2) is fixedly arranged on the telescopic handrail handle assembly (3);

the handrail panel assembly (1) comprises a rotary functional part (11), a handrail bottom cover (12), a handrail panel (13), a four-way sliding part (14), a gear spring (15), a gear shifting part (16), a two-stage rotary functional part (17) and a countersunk head screw (18), wherein stud bulges are fixedly arranged at the center above the rotary functional part (11), the stud bulges of the rotary functional part (11) slide through the handrail bottom cover (12) and sequentially pass through the four-way sliding part (14) and the two-stage rotary functional part (17) to be in threaded installation with the countersunk head screw (18), the handrail bottom cover (12) is fixedly buckled with the handrail panel (13), the handrail bottom cover (12) is provided with an annular notch, two groups of gear springs (15) are slidably arranged in the handrail bottom cover (12), the two groups of gear shifting parts (16) are fixedly arranged at two ends of each gear spring (15), and the two groups are arranged in one group; a transverse groove is formed in one side of the four-way sliding piece (14), a funnel-shaped groove is formed in the middle of the four-way sliding piece (14), two groups of gear shifting pieces (16) are elastically installed in the transverse groove and the funnel-shaped groove of the four-way sliding piece (14) through gear springs (15), gear groove groups are formed in grooves formed in the four-way sliding piece (14) and the handrail bottom cover (12), the gear groove groups are matched with the gear shifting pieces (16), the two-stage rotating functional piece (17) is diamond-shaped, the two-stage rotating functional piece (17) is matched and installed in the funnel-shaped groove of the four-way sliding piece (14), a group of gear shifting pieces (16) and a group of gear springs (15) are limited in the two-stage rotating functional piece, triangular grooves are formed in the upper surface of the two-stage rotating functional piece (17), corresponding triangular protrusions are formed in the inner side inner wall of the handrail panel (13), and the triangular protrusions are mutually matched, and the triangular protrusions are linearly arranged on the inner side wall of the handrail panel (13); the rotating functional piece (11) is rotatably provided with an angle rotating component (2).

2. The armrest autonomously adjustable according to the user's need as claimed in claim 1, wherein: the angle rotating assembly (2) comprises a horizontal rotating functional piece (21), a gear collision bead (22), a multi-functional pressing block (23), a cylindrical screw (24), a reset clamp spring (25), a rotating fixing shaft pin (26), a rotating inner shaft body (27), a gear clamp spring (28) and a gear steel sheet (29), the gear collision bead (22) is adaptively clamped at the bottom of the lower part of the horizontal rotating functional piece (21), the cylindrical screw (24) penetrates through the center of the horizontal rotating functional piece (21) and is installed together with the central thread of the multi-functional pressing block (23), a groove matched with the gear collision bead (22) is formed in the multi-functional pressing block (23), and the multi-functional pressing block (23) is fixedly installed on the telescopic handrail assembly (3) through bolts; the rotary fixing shaft pin (26) is fixedly clamped with a reset clamp spring (25), the rotary fixing shaft pin (26) penetrates through the horizontal rotary functional piece (21) and the rotary inner shaft body (27), the reset clamp spring (25) on the rotary fixing shaft pin (26) is fixedly connected with the rotary inner shaft body (27), gear clamp springs (28) are fixedly clamped in two sides of the rotary inner shaft body (27), gear steel sheets (29) matched with the gear clamp springs (28) are fixedly clamped in two sides of the horizontal rotary functional piece (21), the outside of the horizontal rotary functional piece (21) is matched into a groove below the rotary functional piece (11), the rotary functional piece (11) is installed together through a chamfering screw, a threaded shielding cover is installed on the outer side of the rotary functional piece, and a shielding decorative cover is installed on the joint outer side of the rotary functional piece (11) and the horizontal rotary functional piece (21).

3. The armrest autonomously adjustable according to the user's need as claimed in claim 1, wherein: the telescopic handrail handle assembly (3) comprises a lifting outer cover (31), a lifting sliding tube (32), sliding wear-resistant pieces (33), a lifting gear box (34), a lifting gear card (35), a return spring (36) and a button (37), wherein the lifting sliding tube (32) is clamped in the lifting outer cover (31), the sliding wear-resistant pieces (33) are fixed on two sides above the lifting sliding tube (32), the lifting gear box (34) is slidably arranged in the lifting sliding tube (32), the lifting gear card (35) is arranged in the lifting gear box (34), the return spring (36) is clamped on an upright column above the lifting gear card (35), and the button (37) penetrates through the lifting outer cover (31), the lifting sliding tube (32) and the lifting gear box (34) to be clamped on the lifting gear card (35); gear clamp springs (28) are fixedly arranged above the lifting outer cover (31), buckle notches are formed in the lifting sliding tube (32), buckles matched with the buckle notches formed in the lifting sliding tube (32) are arranged on the lifting gear box (34), and the lifting gear clamp (35) is rotatably arranged in the lifting gear box (34).