CN210674225U

CN210674225U - Transmission connection structure

Info

Publication number: CN210674225U
Application number: CN201921358695.5U
Authority: CN
Inventors: 季雅娟
Original assignee: Zhejiang Real Strength Toys Co Ltd
Current assignee: Zhejiang Real Strength Toys Co Ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-06-05
Anticipated expiration: 2029-08-21

Abstract

The utility model discloses a transmission connection structure, including connecting rod, bolt, nut, drive assembly and be used for connecting the connecting piece of drive assembly and connecting rod, drive assembly includes connecting seat, adapter sleeve, transfer line and bearing, the adapter sleeve is located on the transfer line, the bearing is equipped with two, and overlaps respectively and locate the both ends of adapter sleeve, the connecting seat is including being pipy fixed part and connecting in the ascending connecting portion of fixed part radial direction, the outside of adapter sleeve is located to the fixed part cover, and the excircle interference fit of the inner wall of fixed part both ends mouth and bearing. The utility model discloses joint strength is high, connect stable, long service life and adjustable transmission assembly's orientation and position.

Description

Transmission connection structure

Technical Field

The utility model particularly relates to a transmission connection structure.

Background

The splicing toy is very helpful for improving the intelligence of children, and parents are also very willing to buy the toy for the children. Most concatenation toys at present include more spare parts such as a plurality of connecting rod, connecting piece, drive assembly, bolt, nut, and children can splice each spare part into the toy of various structural shapes through exert oneself imagination, and can make the toy after the concatenation move through drive assembly. However, the existing transmission assembly is low in connection strength and unstable in transmission, and the direction and the installation position of the existing transmission assembly cannot be changed after the existing transmission assembly is connected with the connecting rod through the connecting piece. The existing transmission assembly and the connecting piece are easy to rotate relatively, so that when the connecting rod or the transmission assembly is stressed, the transmission assembly cannot realize transmission or the connecting structure thereof is damaged due to the rotation of the connecting piece, and the service life of the toy is shortened.

SUMMERY OF THE UTILITY MODEL

Based on the problem, the utility model aims to provide a direction and the transmission connection structure of position that joint strength is high, the connection is stable, long service life and adjustable drive assembly.

Aiming at the problems, the following technical scheme is provided: the utility model provides a transmission connection structure, includes connecting rod, bolt, nut, drive assembly and is used for connecting the connecting piece of drive assembly and connecting rod, drive assembly includes connecting seat, adapter sleeve, transfer line and bearing, the adapter sleeve is located on the transfer line, the bearing is equipped with two, and overlaps respectively and locate the both ends of adapter sleeve, the connecting seat is including being pipy fixed part and connecting in the ascending connecting portion of fixed part radial direction, the outside of adapter sleeve is located to the fixed part cover, and the excircle interference fit of the inner wall of fixed part both ends mouth and bearing.

In the structure, when the transmission assembly is assembled, the connecting sleeve is sleeved on the transmission rod, the transmission rod drives the connecting sleeve to be inserted into the fixing part, two ends of the connecting sleeve are respectively sleeved with the bearing, the inner circle of the bearing is matched with the connecting sleeve, the outer circle of the bearing is matched with the fixing part, and the transmission rod is rotated to transmit after being connected with other parts. Through setting up the bearing can be when the transfer line rotates, the connecting seat does not rotate. Be fixed in fixed part both ends through the bearing, and with connecting sleeve looks adaptation to can improve the compactedness of transmission assembly structure, stability when having improved the transmission of transmission assembly has improved the utility model discloses a joint strength and atress intensity. The connecting piece is connected with connecting rod and connecting seat through bolt, nut and can improve the atress intensity and increase the convenience.

The utility model discloses further set up to, the both ends mouth department of fixed part is equipped with the spacing groove with bearing excircle looks adaptation, the both ends of adapter sleeve be equipped with the ring channel of circle looks adaptation in the bearing.

Adopt above-mentioned structure, can avoid the bearing to take place the displacement, and can improve the joint strength between bearing and fixed part and the adapter sleeve, thereby improved the utility model discloses a stability.

The utility model discloses further set up to, the connecting piece includes the joint portion that meets with connecting portion and the block portion that links to each other with the connecting rod, be equipped with the locking dish between connecting portion and the joint portion, all be equipped with the meshing tooth on the face of locking dish both ends, the relative locking dish center circumference of meshing tooth sets up, one side of connecting portion and joint portion towards the locking dish all is equipped with the block tooth with meshing tooth looks adaptation, the fixed orifices has been seted up along its axial direction in connecting portion, locking dish and the joint portion, connecting portion, locking dish and joint portion pass the fixed orifices through the bolt and cooperate fixedly with the nut.

In the structure, the locking disc is clamped through the connecting part and the clamping part, so that the meshing teeth are clamped with the clamping teeth in a matched mode, and the bolt sequentially penetrates through the connecting part, the locking disc and the clamping part through the fixing hole and then is locked and fixed through the nut and the bolt. Cooperate through the engaging tooth on the locking dish and the block tooth on connecting seat, the connecting piece and can prevent that the relative connecting seat of connecting piece from rotating, improved the joint strength between drive assembly and the connecting piece, thereby improved the utility model discloses a stress intensity, stability and security. Loosen the bolt, can adjust the back through rotating the connecting seat to the orientation of adapter sleeve, the relocking bolt to can satisfy user's different demands, improved the utility model discloses a reliability. When adjusting, cooperate through meshing tooth and block tooth and to make the number of degrees of rotation of connecting seat obtain accurate control, thereby improved the utility model discloses a stability and reliability.

The utility model discloses further set up to, the fixed orifices link up to block portion bottom, block portion bottom is equipped with the first fixed slot that is used for fixation nut and communicates mutually with the fixed orifices, connecting portion top and the corresponding position department of fixed orifices are equipped with the second fixed slot that is used for the fixing bolt top, the second fixed slot is linked together with the hole of fixed part, be equipped with the opening with the corresponding position department of second fixed slot on the outer periphery wall of fixed part.

In the structure, when the connecting seat, the stopping disc and the connecting piece are assembled, the bolt sequentially penetrates through the connecting part, the stopping disc and the clamping part through the fixing hole, then is in threaded connection with the nut in the first fixing groove, and the nut is located in the fixing groove and cannot rotate, so that a user can use a wrench to stretch into the opening to rotate the bolt, and the bolt is conveniently matched and locked with the nut. Can prevent through setting up first fixed slot that the nut from rotating to can prevent to loosen between connecting seat, locking dish and the connecting piece and take off and produce the shake, improved the utility model discloses a joint strength, stability and reliability. Can carry on spacingly through setting up the second fixed slot to the bolt for the bolt top is supported in the second fixed slot, thereby has improved the joint strength of connecting seat, locking dish and connecting piece, has improved the utility model discloses a reliability.

The utility model discloses further set up to, be equipped with the through-hole that runs through the adapter sleeve with the corresponding position department of opening on the outer periphery wall of adapter sleeve.

In the structure, the through holes are formed, so that a user can fix the connecting sleeve in the fixing portion through the bearing, the wrench can stretch into the second fixing groove through the opening and the through holes to rotate the bolt to lock the fixing connecting seat, the stop disc and the connecting piece, the transmission rod is inserted into the connecting sleeve to be transmitted after being locked, and convenience in assembly is improved.

The utility model discloses further set up to, be equipped with on the outer periphery wall of connecting rod and link up and the top is the open-ended spout along its axial direction, the spout is equipped with four at least, and circumference sets up on the connecting rod respectively, set up the draw-in groove that link up along its axial direction in the spout, the width of seting up of draw-in groove is greater than the width of seting up of spout, and draw-in groove and two relative lateral wall looks adaptations of nut, the bottom of block portion is equipped with the block groove with connecting rod looks adaptation, be equipped with the mounting hole corresponding with the spout in the block portion, the connecting piece passes through the bolt with the connecting rod in mounting hole to the draw-in groove with nut cooperation.

In the structure, the mounting hole is passed to the bolt bottom, and the nut is connected with the bolt (the nut is in not locking state with the bolt), aims at the two relative lateral walls of nut with the draw-in groove on the connecting rod, promotes connecting rod or pulling connecting piece for the back in the nut slips into the draw-in groove, and after the connecting piece slided to the required position of user, through using the spanner to rotate the bolt, because the draw-in groove has restricted the nut and has rotated, consequently rotate the bolt and can fix connecting piece and connecting rod locking. Through setting up the joint groove can be convenient for the relative connecting rod of connecting piece and slide, and can improve the joint strength between connecting piece and the connecting rod, thereby improved the utility model discloses a reliability. The sliding chute is arranged, so that the connecting piece can conveniently slide relative to the sliding chute to adjust the position, different requirements of users are met, and different shapes are combined; and can prevent that connecting rod relatively connecting piece from rotating, stability and the atress intensity when having improved other spare parts and connecting rod and being connected have improved the utility model discloses a reliability and security. Can be convenient for the connecting piece to link to each other with the connecting rod through setting up the draw-in groove, and put into the nut and can improve joint strength between them and prevent that other people from loosening the nut, improved the utility model discloses a reliability. The width of seting up of draw-in groove is greater than the width of seting up of spout, can be so that one section of centre gripping second connecting rod between nut and the block inslot wall, and the width size of centre gripping is the width difference between draw-in groove and the spout to can improve the joint strength between connecting piece and the connecting rod, improved the utility model discloses a reliability.

The utility model discloses further set up to, on the inner wall in block groove and the connecting rod on the corresponding position department of two relative spouts be equipped with the fixture block, the fixture block extends towards connecting rod the central axis direction.

In the structure, the clamping block is arranged to prevent the connecting piece from rotating circumferentially relative to the connecting rod, so that the stability of connection between the connecting piece and the connecting rod is improved.

The utility model discloses further set up to, the excircle department that lies in the block tooth in the joint portion is equipped with the bulge loop that offsets with the connecting portion terminal surface.

In the structure, can make between joint portion and the connecting portion through the bulge loop form one with the holding chamber of locking dish looks adaptation for the structure between connecting seat, locking dish and the connecting piece is compacter, thereby has improved the utility model discloses a structural strength and stress strength.

The utility model has the advantages that: compare current transmission connection structure, the utility model discloses joint strength is high, connect stable, long service life and adjustable transmission assembly's orientation and position. Be fixed in fixed part both ends through the bearing, and with connecting sleeve looks adaptation to can improve the compactedness of transmission assembly structure, stability when having improved the transmission of transmission assembly has improved the utility model discloses a joint strength and atress intensity. The connecting piece is connected with connecting rod and connecting seat through bolt, nut and can improve the atress intensity and increase the convenience. Loosen the bolt, can adjust the back through rotating the connecting seat to the orientation of adapter sleeve, the relocking bolt to can satisfy user's different demands, improved the utility model discloses a reliability. When adjusting, cooperate through meshing tooth and block tooth and to make the number of degrees of rotation of connecting seat obtain accurate control, thereby improved the utility model discloses a stability and reliability.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the split structure of the present invention.

Fig. 3 is a schematic side view of the present invention.

Fig. 4 is a schematic structural view of the middle connection seat of the present invention.

Fig. 5 is a schematic structural view of the middle connecting sleeve of the present invention.

Fig. 6 is a schematic structural view of the middle connection member of the present invention.

The reference numbers in the figures mean: 1-a connecting rod; 2-a transmission assembly; 3-a connector; 21-a connecting seat; 22-connecting sleeves; 23-a transmission rod; 24-a bearing; 211-a fixation section; 212-a connecting portion; 2111-limit groove; 221-an annular groove; 31-a snap-in part; 32-an engaging portion; 4-a stopper disk; 41-meshing teeth; 311-snap-in teeth; 42-a fixation hole; 321-a first fixing groove; 2121-a second fixation groove; 213-an opening; 222-a via hole; 11-a chute; 12-a card slot; 322-a clamping groove; 323-mounting holes; 5-clamping blocks; 312-convex ring.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

A transmission connection structure as shown in fig. 1 to 6, including connecting rod 1, bolt, nut, drive assembly 2 and be used for connecting drive assembly 2 and connecting rod 1's connecting piece 3, drive assembly 2 includes connecting seat 21, adapter sleeve 22, transfer line 23 and bearing 24, adapter sleeve 22 overlaps on locating transfer line 23, bearing 24 is equipped with two, and overlaps the both ends of locating adapter sleeve 22 respectively, connecting seat 21 is including being pipy fixed part 211 and connecting in the ascending connecting portion 212 of fixed part 211 radial direction, adapter sleeve 22's outside is located to fixed part 211 cover, and the outer circle interference fit of the inner wall of fixed part 211 both ends mouth and bearing 24.

In the structure, when the transmission assembly 2 is assembled, the connecting sleeve 22 is sleeved on the transmission rod 23, the transmission rod 23 drives the connecting sleeve 22 to be inserted into the fixing portion 211, the two ends of the connecting sleeve 22 are respectively sleeved with the bearing 24, the inner circle of the bearing 24 is matched with the connecting sleeve 22, the outer circle of the bearing 24 is matched with the fixing portion 211, and the transmission rod 23 is rotated to transmit after being connected with other parts. By providing the bearing 24, the connecting base 21 can not rotate when the transmission rod 23 rotates. Be fixed in fixed part 211 both ends through bearing 24, and with adapter sleeve 22 looks adaptation to can improve the compactedness of transmission assembly 2 structure, stability when having improved transmission assembly 2 transmission has improved the utility model discloses a joint strength and stress intensity. The connecting piece 3 is connected with the connecting rod 1 and the connecting seat 21 through bolts and nuts, so that the stress intensity can be improved, and the convenience is improved.

In this embodiment, two ports of the fixing portion 211 are provided with a limiting groove 2111 adapted to an outer circle of the bearing 24, and two ends of the connecting sleeve 22 are provided with an annular groove 221 adapted to an inner circle of the bearing 24.

Adopt above-mentioned structure, can avoid bearing 24 to take place the displacement, and can improve bearing 24 and fixed part 211 and the joint strength between the adapter sleeve 22, thereby improved the utility model discloses a stability.

In this embodiment, the connecting piece 3 includes the joint portion 31 that meets with connecting portion 212 and the block portion 32 that links to each other with connecting rod 1, be equipped with stop disk 4 between connecting portion 212 and the joint portion 31, all be equipped with meshing tooth 41 on the face of 4 both ends of stop disk, meshing tooth 41 sets up in the relative stop disk 4 center circumference, connecting portion 212 and joint portion 31 all are equipped with the block tooth 311 with meshing tooth 41 looks adaptation towards one side of stop disk 4, fixing hole 42 has been seted up along its axial direction on connecting portion 212, stop disk 4 and the joint portion 31, connecting portion 212, stop disk 4 and joint portion 31 pass fixing hole 42 through the bolt and the nut cooperatees fixedly.

In the above structure, the connecting portion 212 and the clamping portion 31 clamp the stopping disk 4, so that the engaging teeth 41 and the clamping teeth 311 are adapted to be clamped, and after the bolt sequentially passes through the connecting portion 212, the stopping disk 4 and the clamping portion 31 through the fixing hole 42, the bolt is screwed and locked with the connecting portion 212, the stopping disk 4 and the clamping portion 31 through the nut. Cooperate through engaging tooth 41 on the locking disc 4 and block tooth 311 on connecting seat 21, the connecting piece 3 and can prevent that connecting piece 3 is connecting seat 21 relatively from rotating, improved the joint strength between drive assembly 2 and the connecting piece 3, thereby improved the utility model discloses a stress intensity, stability and security. Loosen the bolt, can adjust the back through rotating connecting seat 21 to the orientation of adapter sleeve 22, the relocking bolt to can satisfy user's different demands, improved the utility model discloses a reliability. When adjusting, cooperate through meshing tooth 41 and block tooth 311 and can make the number of degrees of rotation of connecting seat 21 obtain accurate control, thereby improved the utility model discloses a stability and reliability.

In this embodiment, the fixing hole 42 penetrates the bottom of the engaging portion 32, a first fixing groove 321 for fixing a nut and communicating with the fixing hole 42 is disposed at the bottom of the engaging portion 32, a second fixing groove 2121 for fixing a top end of a bolt is disposed at a position corresponding to the fixing hole 42 at the top of the connecting portion 212, the second fixing groove 2121 communicates with an inner hole of the fixing portion 211, and an opening 213 is disposed at a position corresponding to the second fixing groove 2121 on the outer circumferential wall of the fixing portion 211.

In the above structure, when the connecting seat 21, the stopping disk 4 and the connecting member 3 are assembled, the bolt sequentially passes through the connecting portion 212, the stopping disk 4 and the clamping portion 31 through the fixing hole 42, and then is screwed with the nut in the first fixing groove 321, and the nut is located in the fixing groove and cannot rotate, so that a user can use a wrench to stretch into the opening 213 to rotate the bolt, thereby facilitating the locking with the nut. Can prevent through setting up first fixed slot 321 that the nut from rotating to can prevent to loosen and take off and produce the shake between connecting seat 21, locking disc 4 and the connecting piece 3, improve the utility model discloses a joint strength, stability and reliability. Can carry on spacingly through setting up second fixed slot 2121 to the bolt for the bolt top supports in second fixed slot 2121, thereby has improved connecting seat 21, locking dish 4 and connecting piece 3's joint strength, has improved the utility model discloses a reliability.

In this embodiment, a through hole 222 penetrating through the connection sleeve 22 is disposed on the outer circumferential wall of the connection sleeve 22 at a position corresponding to the opening 213.

In the above structure, the through hole 222 is provided to enable a user to fix the connecting sleeve 22 in the fixing portion 211 through the bearing 24, so that the wrench can be conveniently inserted into the second fixing groove 2121 through the opening 213 and the through hole 222 to lock and fix the connecting seat 21, the stopping disc 4 and the connecting piece 3 with the bolt, and the transmission rod 23 is inserted into the connecting sleeve 22 for transmission after being locked, thereby improving the convenience in assembly.

In this embodiment, be equipped with on the outer periphery wall of connecting rod 1 and link up along its axial direction and the top is spout 11 of opening 213, spout 11 is equipped with four at least, and circumference sets up respectively on connecting rod 1, set up in spout 11 along the draw-in groove 12 that its axial direction link up, the width of seting up of draw-in groove 12 is greater than the width of seting up of spout 11, and draw-in groove 12 and two relative lateral wall looks adaptations of nut, the bottom of block portion 32 is equipped with the block groove 322 with connecting rod 1 looks adaptation, be equipped with the mounting hole 323 corresponding with spout 11 on the block portion 32, connecting piece 3 and connecting rod 1 pass through the bolt mounting hole 323 and cooperate the lock with the nut in draw-in groove 12 and fix.

In the structure, the bottom end of the bolt penetrates through the mounting hole 323, the nut is connected with the bolt (the nut and the bolt are in an unlocked state), the clamping groove 12 in the connecting rod 1 is aligned to two opposite side walls of the nut, the connecting rod 1 or the connecting piece 3 is pushed or pulled, the nut slides into the clamping groove 12, the connecting piece 3 slides to a position required by a user, the bolt is rotated by using a wrench, and the nut is limited by the clamping groove 12 to rotate, so that the connecting piece 3 and the connecting rod 1 can be locked and fixed by the rotating bolt. Can be convenient for connecting piece 3 relative connecting rod 1 to slide through setting up block groove 322, and can improve the joint strength between connecting piece 3 and the connecting rod 1, thereby improved the utility model discloses a reliability. The sliding chute 11 is arranged, so that the connecting piece 3 can conveniently slide relative to the sliding chute to adjust the position, different requirements of users are met, and different shapes are combined; and can prevent connecting rod 1 relative connection piece 3 from rotating, stability and the atress intensity when having improved other spare parts and being connected with connecting rod 1 have improved the utility model discloses a reliability and security. Can be convenient for connecting piece 3 and connecting rod 1 link to each other through setting up draw-in groove 12, and put into draw-in groove 12 with the nut and can improve joint strength between them and prevent that other people from loosening the nut, improved the utility model discloses a reliability. The width of seting up of draw-in groove 12 is greater than the width of seting up of spout 11, can be so that one section of second connecting rod 1 is being centre gripping between nut and the block groove 322 inner wall, and the width size of centre gripping is the width difference between draw-in groove 12 and the spout 11 to can improve the joint strength between connecting piece 3 and the connecting rod 1, improved the utility model discloses a reliability.

In this embodiment, a fixture block 5 is disposed on the inner wall of the fastening groove 322 and at a position corresponding to the two opposite sliding grooves 11 on the connecting rod 1, and the fixture block 5 extends toward the central axis of the connecting rod 1.

In the structure, the clamping block 5 is arranged to prevent the connecting piece 3 from rotating circumferentially relative to the connecting rod 1, so that the stability of connection between the connecting piece 3 and the connecting rod 1 is improved.

In this embodiment, a convex ring 312 abutting against the end surface of the connecting portion 212 is disposed on the outer circle of the engaging tooth 311 of the engaging portion 31.

In the structure, can make between joint portion 31 and the connecting portion 212 through bulge loop 312 form one with the holding chamber of locking disk 4 looks adaptation for the structure between connecting seat 21, locking disk 4 and the connecting piece 3 is compacter, thereby has improved the utility model discloses a structural strength and stress strength.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations of the above assumption should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a transmission connection structure, includes connecting rod, bolt, nut, transmission assembly and is used for connecting the connecting piece of transmission assembly and connecting rod, its characterized in that: the transmission assembly comprises a connecting seat, a connecting sleeve, a transmission rod and a bearing, the connecting sleeve is arranged on the transmission rod, the two bearings are arranged, the two ends of the connecting sleeve are respectively sleeved with the two bearings, the connecting seat comprises a tubular fixing part and a connecting part connected to the radial direction of the fixing part, the fixing part is sleeved with the outer part of the connecting sleeve, and the inner wall of the two end ports of the fixing part is in interference fit with the outer circle of the bearing.

2. A drive connection according to claim 1, wherein: and two end openings of the fixing part are provided with limit grooves matched with the outer circle of the bearing, and two ends of the connecting sleeve are provided with annular grooves matched with the inner circle of the bearing.

3. A drive connection according to claim 1, wherein: the connecting piece includes the joint portion that meets with connecting portion and the block portion that links to each other with the connecting rod, be equipped with the locking dish between connecting portion and the joint portion, all be equipped with the meshing tooth on the face of locking dish both ends, the relative locking dish center circumference of meshing tooth sets up, one side of connecting portion and joint portion orientation locking dish all is equipped with the block tooth with meshing tooth looks adaptation, the fixed orifices has been seted up along its axial direction in connecting portion, locking dish and the joint portion, connecting portion, locking dish and joint portion pass the fixed orifices and cooperate fixedly with the nut through the bolt.

4. A drive connection according to claim 3, wherein: the fixed orifices link up to block portion bottom, block portion bottom is equipped with the first fixed slot that is used for fixation nut and communicates with the fixed orifices, the position department that connecting portion top and fixed orifices correspond is equipped with the second fixed slot that is used for the fixing bolt top, the second fixed slot is linked together with the hole of fixed part, be equipped with the opening with the position department that the second fixed slot corresponds on the outer circumferential wall of fixed part.

5. A drive connection according to claim 4, wherein: and a through hole penetrating through the connecting sleeve is arranged at the position, corresponding to the opening, on the outer circumferential wall of the connecting sleeve.

6. A drive connection according to claim 4, wherein: be equipped with on the outer periphery wall of connecting rod and link up and the top is open-ended spout along its axial direction, the spout is equipped with four at least, and circumference sets up on the connecting rod respectively, set up the draw-in groove that link up along its axial direction in the spout, the width of seting up of draw-in groove is greater than the width of seting up of spout, and draw-in groove and two relative lateral wall looks adaptations of nut, the bottom of block portion is equipped with the block groove with connecting rod looks adaptation, be equipped with the mounting hole corresponding with the spout in the block portion, the connecting piece passes mounting hole to the draw-in groove through the bolt and cooperates the locking with the nut and fix with the.

7. A drive connection according to claim 6, wherein: the inner wall of the clamping groove and the positions corresponding to the two opposite sliding grooves on the connecting rod are provided with clamping blocks, and the clamping blocks extend towards the direction of the central axis of the connecting rod.

8. A drive connection according to claim 3, wherein: and a convex ring which is abutted against the end face of the connecting part is arranged at the excircle of the clamping tooth on the clamping part.

9. A drive connection according to claim 1, wherein: the transmission rod adopts a hexagonal prism.