DE202023103806U1 - Dual-use manual electric wheelchair - Google Patents

Abstract

A dual-use manual electric wheelchair comprising an interconnected seat cushion (1), a backrest (2) and an armrest (3) and a support frame assembly arranged on the underside of the seat cushion (1), characterized in that the support frame assembly comprises a rear wheel support rod (4) and a cross member (5), said armrest (3) being detachably connected to a mobile controller (6), said cross member (5) being detachably connected to a battery (7); further comprising an electric vehicle wheel (8) and a driving motor (9) connected by mutual transmission, and a manual wheel (13), the wheelchair having a manual state and an electric state;
that the end of the rear wheel support rod (4) is provided with an attachment piece (10), the attachment piece (10) being provided with a first attachment hole (11), the drive motor (9) being provided with a first connection hole (12), wherein the first attachment hole (11) is connected to the first connection hole (12) by a fastener when the wheelchair is in a manual state;
that the manual wheel (13) is rotatably provided with a connecting shaft (14), the rear wheel support rod (4) being provided with a through hole (15), the connecting shaft (14) being connected in mating with the through hole (15) when the wheelchair is in an electrical condition.

Description

area of utility model

The present utility model relates to the technical field of wheelchair equipments, particularly to a dual-use manual electric wheelchair.

State of the art

With the development of China's economy and social progress, China's spiritual and material civilization have made great strides. China has gradually entered an aging society. Society's attention to vulnerable groups such as the elderly and disabled has gradually increased. There are more and more humane living aids for people with disabilities and the elderly on the market. In particular, there are many types of wheelchairs serving disabled and elderly people on the market, and assistive devices with different functions and adjustments to different usage environments are used to serve disabled and elderly people who meet different needs. With the improvement of living standards, wheelchair vehicles accompany more and more people with disabilities and the elderly in home life. In order to make home life easier, using a manual wheelchair is more appropriate due to the limited space in the house and room. It is more convenient to use an electric wheelchair vehicle when traveling or other occasions. In this way, the demand for wheelchair vehicles becomes two vehicles, causing many inconveniences for storage and carrying during travel.

abandonment of the utility model

In order to solve the above problems, the present utility model provides a dual-use manual electric wheelchair, thereby solving the problem that conventional wheelchairs cannot accommodate the electric and manual modes of use.

Technical solution according to the present utility model: Dual-use manual electric wheelchair, comprising an interconnected seat cushion, a backrest and an armrest, and a support frame assembly arranged on the underside of the seat cushion, that the support frame assembly comprises a rear wheel support rod and a cross member, wherein the armrest is detachably connected to a mobile controller, wherein the cross member is detachably connected to a battery; further comprising an electric vehicle wheel and a driving motor connected by mutual transmission, and a manual wheel, wherein the wheelchair has a manual state and an electric state;
that the end of the rear wheel support rod is provided with an attachment piece, the attachment piece being provided with a first attachment hole, the drive motor being provided with a first connection hole, the first attachment hole being connected to the first connection hole by a fastener when the wheelchair is in is in a manual state;
that the manual wheel is rotatably provided with a connecting shaft, the rear wheel support rod is provided with a through hole,
wherein the connection shaft is connected to the through hole in mating relationship when the wheelchair is in an electric state.

The above technical solution provides that the electric vehicle wheel and the drive motor are connected through the rear support rod when the wheelchair is in an electric state, and the manual wheel is connected through the rear support rod when the wheelchair is in a manual state. For the wheelchair according to the present utility model, the drive mode and the structure can be changed according to the user's needs. There is no need to buy these two types of wheelchairs separately, such as manual wheelchairs and electric wheelchairs, which makes it easier to store, use and carry wheelchairs. When the wheelchair is in a manual state, the user can selectively detach the battery and mobile controller to reduce weight and facilitate operation.

Furthermore, it is envisaged that the wheelchair also comprises a fender and a connector which are firmly connected to each other, the connector being provided with a second connection hole, the first connection hole, the first connection hole and the second connection hole having the same number, the the first attachment hole is connected to the first connection hole and the second connection hole by a fastener when the wheelchair is in an electric state with the fender located over the electric vehicle wheel.

The above technical solution provides that the first attachment hole, the first connection hole and the second connection hole, that correspond to each other are connected by the same fastener, making the installation of the mudguard more convenient. With the fender and connector installed on the attachment piece, it avoids the sewage on the manual wheel from splashing on the user, making the use more hygienic.

It is further provided that the connecting shaft comprises a first bolt and a first nut which are detachably connected, the manual wheel being provided with a shaft hole, a first bearing being arranged between the shaft hole and the first bolt, with a second bearing between the through hole and the first bolt, the first bolt also being encased with a bush, the bush being between the first bearing and the second bearing.

Through the above technical solution, the rotational connection between the connecting shaft and the manual wheel and between the connecting shaft and the rear wheel support rod is designed to be smoother, with the first bearing and the second bearing being axially positioned by the arrangement of the bush, so that the working state of the first camp and the second camp is more stable.

Furthermore, it is envisaged that the wheelchair also includes a second bolt and a second nut, the cross member includes a first beam and a second beam, the battery and the first beam are each provided with installation holes and perforations, the perforation, the installation hole and the second bolt is the same number and at least two, the wheelchair also comprising a fastener, the fastener having a ⊏ shape, the second bolt passing through the installation hole and the perforation and being screwed to the second nut when the wheelchair is in an electrical condition with the second beam and battery being trapped in the latch.

The above technical solution provides that the perforation, the installation hole, the second bolt and the second nut are the same number and at least two, thereby reducing the offset and slosh around the circumferential direction of the second bolt after the installation of the battery is completed become. The edge of the battery and the second carrier can be pressed against each other by the two ends of the fastener, avoiding collision shock between the battery and the second carrier, making the battery more stable after the installation is completed.

It is further provided that the second bracket is provided with a first screw hole and a first screw, the first screw being screwed into the first screw hole and tipped out of the top surface of the second bracket, the first screw being attached to both sides of the battery , when the battery is installed on the first carrier and the second carrier.

By the above technical solution, it is intended that after the installation of the battery is completed, the offset and the sloshing of the battery in the circumferential direction are further avoided, thereby making the installation of the battery more stable.

It is further envisaged that the wheelchair also comprises an installation bar and an anti-reverse wheel rotationally connected to each other, the installation bar being provided with at least two third connection holes, the attachment piece being provided with at least two second attachment holes, the second Fixing hole has an equal number and a corresponding position as the third connection hole, the second fixing hole being connected to the third connection hole by a fixing member when the wheelchair is in an electric state with the anti-reverse wheel located behind the electric vehicle wheel .

Through the above technical solution, it is envisaged that the easy-to-tilt wheelchair can be stably supported by the anti-backward wheel and installation rod in the wheelchair's electrical state, thereby avoiding the user and the wheelchair as a whole to fall backwards and the Safety is increased when using the wheelchair in the electrical state.

It is further provided that the mobile controller is provided with a plug-in rod, the armrest being provided with a plug-in hole for adapting to the plug-in rod, the armrest being provided with a second screw hole for connecting to the plug-in hole, the internal thread of the second screw hole having connected to a second screw to stop and lock the push rod.

The above technical solution provides that after the plug rod has been inserted into the plug hole, the second screw is screwed until the end of the second screw is pressed against the plug rod, so that the plug rod can be locked.

The present utility model thus relates in particular to the technical field of wheelchair equipments, in particular to a dual-use manual electric wheelchair comprising an interconnected seat cushion, a backrest and an armrest and a support frame assembly arranged on the underside of the seat cushion, the A support frame assembly comprises a rear wheel support bar and a cross member, the armrest being detachably connected to a mobile controller, the cross member being detachably connected to a battery; further comprising an electric vehicle wheel and a driving motor connected by mutual transmission, and a manual wheel, wherein the wheelchair has a manual state and an electric state; the rear support rod is provided with an attachment piece, the attachment piece being provided with a first attachment hole, the drive motor being provided with a first connection hole, the first attachment hole being connected to the first connection hole by a fastener when the wheelchair is in a manual state located; the manual wheel is rotatably provided with a connecting shaft, the rear wheel support rod being provided with a through hole, the connecting shaft being matingly connected to the through hole when the wheelchair is in an electric state. The present utility model solves the problem that conventional wheelchairs cannot accommodate electric and manual modes of use.

character list

• 1 ist ein schematisches Diagramm der Struktur eines Rollstuhls in einem elektrischen Zustand;
• 2 ist ein schematisches Diagramm der Struktur eines Rollstuhls in einem manuellen Zustand;
• 3 ist ein schematisches Diagramm der Struktur einer Hinterradstützstange und ihrer verbundenen Komponenten in einem elektrischen Zustand und einem manuellen Zustand;
• 4 ist ein Explosionsdiagramm I der Teilstruktur gemäß dem vorliegenden Gebrauchsmuster;
• 5 ist eine Schnittansicht der Teilstruktur gemäß dem vorliegenden Gebrauchsmuster;
• 6 ist ein Explosionsdiagramm II der Teilstruktur gemäß dem vorliegenden Gebrauchsmuster.

In order to more clearly describe the embodiments of the present utility model or the technical solutions in the prior art, the drawings to be used in the description of the embodiments or the prior art are briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present utility model. Those of ordinary skill in the art can also obtain other drawings according to the structures shown in these drawings without doing any creative work.

• 1 Fig. 12 is a schematic diagram of the structure of a wheelchair in an electric state;
• 2 Fig. 12 is a schematic diagram of the structure of a wheelchair in a manual state;
• 3 Fig. 12 is a schematic diagram of the structure of a rear wheel support rod and its associated components in an electric state and a manual state;
• 4 Fig. 13 is an exploded diagram I of the partial structure according to the present utility model;
• 5 Fig. 12 is a sectional view of the partial structure according to the present utility model;
• 6 12 is an exploded diagram II of the partial structure according to the present utility model.

The realization of the purpose, the functional characteristics and the advantages of the present utility model will be further explained in combination with the exemplary embodiments with reference to the drawings.

Description of the preferred embodiment examples

The technical solutions in the embodiments of the present utility model are described clearly and fully in the following in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments and not all embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained without creative work by those of ordinary skill in the art fall within the scope of the present utility model.

It should be noted that all directional indications (e.g., up, down, left, right, front, back...) in the embodiments of the present utility model are only used to indicate the relative positional relationship and movement between components in a particular posture (as shown in the drawings). When the specific stance changes, the directional indicator changes accordingly.

Furthermore, descriptions relating to First, Second, etc. in the present utility model are used for descriptive purposes only and should not be taken to indicate or imply their relative importance or to imply the number of technical features indicated. Thus, features restricted to first and second may explicitly or implicitly contain at least one of those features. In addition, technical solutions between different embodiments can be combined with each other, but must be based on the ability of the ordinary person skilled in the art to implement them. If the combination of technical solutions is contradictory or not feasible, it should be assumed that the combination of such technical solutions does not exist and does not fall within the scope of protection of the present utility model.

A dual-use manual electric wheelchair comprising an interconnected seat cushion 1, a backrest 2 and an armrest 3, and a support frame assembly arranged on the underside of the seat cushion 1, the support frame assembly comprising a rear wheel support rod 4 and a cross member 5, the armrest 3 is detachably connected to a mobile controller 6, the cross member 5 being detachably connected to a battery 7; further comprising an electric vehicle wheel 8 and a driving motor 9 connected by mutual transmission, and a manual wheel 13, wherein the wheelchair has a manual state and an electric state, see FIG 1 , 2 , 3 ;
that the end of the rear wheel support rod 4 is provided with an attachment piece 10, the attachment piece 10 being provided with a first attachment hole 11, the drive motor 9 being provided with a first connection hole 12, the first attachment hole 11 being connected to the first connection hole 12 by a fastener connected when the wheelchair is in a manual state;
that the manual wheel 13 is rotatably provided with a connecting shaft 14, the rear wheel support rod 4 being provided with a through hole 15, the connecting shaft 14 being matingly connected to the through hole 15 when the wheelchair is in an electric state.

Further, it is envisaged that the electric vehicle wheel 8 and the drive motor 9 are connected through the rear support rod 4 when the wheelchair is in an electric state, while the manual wheel 13 is connected through the rear support rod 4 when the wheelchair is in a manual state . For the wheelchair according to the present utility model, the drive mode and the structure can be changed according to the user's needs. There is no need to buy these two types of wheelchairs separately, such as manual wheelchairs and electric wheelchairs, which makes it easier to store, use and carry wheelchairs. When the wheelchair is in a manual state, the user can selectively detach the battery 7 and mobile controller 6 to reduce weight and facilitate operation.

Furthermore, it is envisaged that the wheelchair also comprises a fender 16 and a connector 17, which are rigidly connected to each other, the connector 17 being provided with a second connection hole 18, the first connection hole 11, the first connection hole 12 and the second connection hole 18 have the same number, the first attachment hole 11 is connected to the first connection hole 12 and the second connection hole 18 by a fastener when the wheelchair is in an electric state with the fender 16 located over the electric vehicle wheel 8 . In addition, the first attachment hole 11, the first attachment hole 12, and the second attachment hole 18, which correspond to each other, are designed to be connected by the same fastener, thereby making the installation of the fender 16 more convenient. When the mudguard 16 and the connector 17 are installed on the attachment piece 10, the sewage on the manual wheel 13 is avoided from splashing on the user, making the use more sanitary. Since the shape of the fender 16 matches the shape of the electric vehicle wheel 8, the fender 16 is installed only when the wheelchair is switched to an electric state.

It is further provided that the connecting shaft 14 comprises a first bolt 141 and a first nut 142 which are detachably connected, the manual wheel 13 being provided with a shaft hole 19, with a first bearing 20 between the shaft hole 19 and the first bolt 141 with a second bearing 21 interposed between the through hole 15 and the first bolt 141, the first bolt 141 also being encased with a bushing 22, the bushing 22 being between the first bearing 20 and the second bearing 21. In addition, it is envisaged that the rotational connection between the connecting shaft 14 and the manual wheel 13 and between the connecting shaft 14 and the rear wheel support rod 4 is smoother, with the first bearing 20 and the second bearing 21 being axially positioned by the arrangement of the bushing 22 so that the working condition of the first bearing 20 and the second bearing 21 is more stable.

Preferably two first bearings 20 are symmetrically arranged in the shaft hole 19, preferably two second bearings 21 are symmetrically arranged in the through hole 15.

It is further provided that the wheelchair also comprises a second bolt 23 and a second nut 37, the cross member 5 comprising a first member 51 and a second member 52, the battery 7 and the first member 51 having installation holes 24 and perforations 25, respectively verses are hen, wherein the perforation 25, the installation hole 24 and the second bolt 23 are in the same number and at least two, the wheelchair also includes a closure 26, the closure 26 having a ⊏-shape, the second bolt 23 through the installation hole 24 and the perforation 25 runs and is screwed to the second nut 37 when the wheelchair is in an electrical state, with the second bracket 52 and the battery 7 being clamped in the closure 26, cf 1 , 2 , 4 . In addition, the perforation 25, the installation hole 24, the second bolt 23 and the second nut 37 are designed to be the same number and at least two, thereby eliminating the offset and slosh around the circumferential direction of the second bolt 23 after the installation of the battery is completed 7 can be reduced. The edge of the battery 7 and the second bracket 52 can be pressed against each other by the two ends of the shutter 26, avoiding a collision hit between the battery 7 and the second bracket 52, making the battery 7 more stable after the installation is completed.

The number of perforations 25, installation holes 24 and second bolts 23 is preferably two.

It is further provided that the second bracket 52 is provided with a first screw hole 27 and a first screw 28, the first screw 28 being screwed to the first screw hole 27 and tilted out of the upper surface of the second bracket 52, the first screw 28 attached to both sides of the battery 7 when the battery 7 is installed on the first bracket 51 and the second bracket 52 . In addition, it is designed that after the installation of the battery 7 is completed, the displacement and the sloshing of the battery 7 in the circumferential direction are further avoided, thereby making the installation of the battery 7 more stable.

Furthermore, it is envisaged that the wheelchair also comprises an installation rod 29 and an anti-reverse wheel 30 which are rotationally connected to each other, the installation rod 29 being provided with at least two third connection holes 31, the attachment piece 10 being provided with at least two second attachment holes 32 is provided, wherein the second attachment hole 32 has a same number and a corresponding position as the third connection hole 31, the second attachment hole 32 is connected to the third connection hole 31 by a fastener when the wheelchair is in an electrical state, wherein the anti-reverse wheel 30 is located behind the electric vehicle wheel 8 . In addition, it is designed that the easy-to-tilt wheelchair can be stably supported by the anti-reverse wheel 30 and the installation rod 29 in the electric state of the wheelchair, thereby avoiding the fall of the user and the wheelchair as a whole backwards and enhancing safety of use in the electric condition of the wheelchair is increased. The number of the third connecting holes 31 arranged on a single installation rod 29 is preferably two, and the number of the second mounting holes 32 arranged on a single mounting piece 10 is preferably two.

It is further provided that the mobile controller 6 is provided with a plug-in rod 33, the armrest 3 is provided with a plug-in hole 34 for adapting to the plug-in rod 33, the armrest 3 is provided with a second screw hole 35 for connecting with the plug-in hole 34 , wherein the internal thread of the second screw hole 35 is connected to a second screw 36 for stopping and locking the connecting rod 33, see 1 , 2 , 5 , 6 . In addition, it is provided that after the plug-in rod 33 has been inserted into the plug-in hole 34, the second screw 36 is screwed until the end of the second screw 36 is pressed against the plug-in rod 33, so that the plug-in rod 33 can be locked.

• Ausführungsbeispiel 1: Wenn sich der Rollstuhl in einem manuellen Zustand befindet, wird das manuelle Rad 13 durch die Verbindung zwischen der Verbindungswelle 14 und dem Durchgangsloch 15 installiert;
• Nach dem separaten Abnehmen der mobilen Steuerung 6 und der Batterie 7 erfolgt dann die Verwendung des Rollstuhls.
• Ausführungsbeispiel 2: Wenn sich der Rollstuhl in einem manuellen Zustand befindet, wird das manuelle Rad 13 durch die Verbindung zwischen der Verbindungswelle 14 und dem Durchgangsloch 15 installiert; Nach dem separaten Abnehmen der Batterie 7 erfolgt dann die Verwendung des Rollstuhls.
• Ausführungsbeispiel 3: Wenn sich der Rollstuhl in einem manuellen Zustand befindet, wird das manuelle Rad 13 durch die Verbindung zwischen der Verbindungswelle 14 und dem Durchgangsloch 15 installiert; Die Verwendung des Rollstuhls erfolgt dann im eingebauten Zustand der Batterie 7 und der mobilen Steuerung 6.

When the wheelchair is in an electric state, the mobile controller 6 and the mobile controller 6 and the battery 7 are installed and electrically connected to each other. According to the different ways of using the wheelchair in a manual state, the present utility model is divided into the following three embodiments:

• Embodiment 1: When the wheelchair is in a manual state, the manual wheel 13 is installed through the connection between the connecting shaft 14 and the through hole 15;
• After removing the mobile controller 6 and the battery 7 separately, the wheelchair can then be used.
• Embodiment 2: When the wheelchair is in a manual state, the manual wheel 13 is installed through the connection between the connecting shaft 14 and the through hole 15; After removing the battery 7 separately, the wheelchair can then be used.
• Embodiment 3: When the wheelchair is in a manual state, the manual wheel 13 is driven by the connection between the connecting shaft 14 and the through through hole 15 installed; The wheelchair can then be used with the battery 7 and the mobile controller 6 installed.

The preferred embodiment 1 of the present utility model is a preferred solution of the present utility model. Compared with the embodiment 2, 3, the number and the overall quality of the installation components are reduced in the embodiment 1, so that the user's manual operation of the wheelchair is more labor-saving.

The above are only preferred embodiments of the present utility model and therefore do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the idea of the present utility model through the contents of the specification and drawings of the present utility model, or direct/indirect application to other related technical fields is included in the scope of patent protection of the present utility model.

Reference List

1

seat cushions;

2

Backrest;

3

Armrest;

4

rear wheel support rod;

5

cross member,

6

mobile control;

7

Battery;

8th

electric vehicle wheel;

9

drive motor;

10

mounting piece;

11

First mounting hole;

12

First connection hole;

13

manual wheel;

14

connecting shaft;

15

through hole;

16

Fender;

17

connector;

18

Second connection hole;

19

shaft hole;

20

First camp;

21

Second camp;

22

Rifle;

23

second bolt;

24

installation hole;

25

Perforation;

26

clasp;

27

First screw hole;

28

First screw;

29

installation rod;

30

anti-reverse wheel;

31

Third connection hole;

32

Second mounting hole;

33

pole,

34

plug hole;

35

Second screw hole;

36

second screw;

37

second mother;

51

First carrier;

52

second carrier;

141

First Bolt;

142

First mother;

Claims (7)

A dual-use manual electric wheelchair comprising an interconnected seat cushion (1), a backrest (2) and an armrest (3) and a support frame assembly arranged on the underside of the seat cushion (1), characterized in that the support frame assembly comprises a rear wheel support rod (4) and a cross member (5), said armrest (3) being detachably connected to a mobile controller (6), said cross member (5) being detachably connected to a battery (7); further comprising an electric vehicle wheel (8) and a driving motor (9) connected by mutual transmission, and a manual wheel (13), the wheelchair having a manual state and an electric state; that the end of the rear wheel support rod (4) is provided with an attachment piece (10), the attachment piece (10) being provided with a first attachment hole (11), the drive motor (9) being provided with a first connection hole (12), wherein the first attachment hole (11) is connected to the first connection hole (12) by a fastener when the wheelchair is in a manual state; that the manual wheel (13) is rotatably provided with a connecting shaft (14), the rear wheel support rod (4) being provided with a through hole (15), the connecting shaft (14) being in mating with the through hole (15) when the wheelchair is in an electrical state. Dual-use manual electric wheelchair after claim 1 , characterized in that the wheelchair also comprises a fender (16) and a connector (17) rigidly connected to each other, the connector (17) being provided with a second connecting hole (18), the first fixing hole (11) , the first connection hole (12) and the second connection hole (18) have the same number, wherein the first attachment hole (11) is connected to the first connection hole (12) and the second connection hole (18) by a fastener when the wheelchair moves is in an electrical state with the fender (16) over the electric vehicle wheel (8). Dual-use manual electric wheelchair after claim 2 , characterized in that the connecting shaft (14) comprises a first bolt (141) and a first nut (142) detachably connected, wherein the manual wheel (13) is provided with a shaft hole (19), wherein a first bearing (20) is arranged between the shaft hole (19) and the first bolt (141), with a second bearing (21) being arranged between the through hole (15) and the first bolt (141), the first bolt (141) also is covered with a bushing (22), the bushing (22) being located between the first bearing (20) and the second bearing (21). Dual-use manual electric wheelchair after claim 1 or 2 or 3 , characterized in that the wheelchair also comprises a second bolt (23) and a second nut (37), the cross beam (5) comprising a first beam (51) and a second beam (52), the battery (7) and the first bracket (51) is provided with installation holes (24) and perforations (25), respectively, the perforation (25), the installation hole (24) and the second bolt (23) being equal in number and at least two, wherein the wheelchair also comprises a latch (26), the latch (26) having a ⊏ shape, the second bolt (23) passing through the installation hole (24) and the perforation (25) and being connected to the second nut (37) is bolted when the wheelchair is in an electrical state, the second bracket (52) and the battery (7) being clamped in the closure (26). Dual-use manual electric wheelchair after claim 4 , characterized in that the second bracket (52) is provided with a first screw hole (27) and a first screw (28), the first screw (28) being screwed to the first screw hole (27) and emerging from the upper surface of the second bracket (52) with the first screw (28) attached to both sides of the battery (7) when the battery (7) is installed on the first bracket (51) and the second bracket (52). Dual-use manual electric wheelchair after claim 1 or 2 or 3 or 5 , characterized in that the wheelchair also comprises an installation rod (29) and an anti-reverse wheel (30) which are rotationally connected to each other, the installation rod (29) being provided with at least two third connection holes (31), the Fastening piece (10) is provided with at least two second fastening holes (32), the second fastening hole (32) having the same number and a corresponding position as the third connecting hole (31), the second fastening hole (32) being connected by a fastening element to the third connection hole (31) when the wheelchair is in an electric state with the anti-reverse wheel (30) located behind the electric vehicle wheel (8). Dual-use manual electric wheelchair after claim 6 , characterized in that the mobile controller (6) is provided with a plug-in rod (33), the armrest (3) being provided with a plug-in hole (34) for adapting to the plug-in rod (33), the armrest (3) having a second screw hole (35) for connecting to the plug hole (34), the female thread of the second screw hole (35) being connected to a second screw (36) for stopping and locking the plug rod (33).

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