TWM493618U - Fire-proof extendible tube of actuator - Google Patents

Description

Fireproof telescopic tube for actuator 【0001】

This creation relates to a telescopic tube, and more particularly to a fire-resistant telescopic tube for use in a linear actuator.

【0002】

Linear actuators have been widely used in hospital beds, electric chairs, electric doors, lifting equipment or furniture due to their light weight and quick response. Moreover, linear actuators generally reduce weight and material cost. Under the consideration of many factors, the nuts used for driving with the lead screw are made of plastic materials.

[0003]

However, although the plastic nut has the advantages of light weight and low cost, in the event of a fire, the plastic nut is easily burned and fails. Moreover, if the device or device provided with such an actuator is being actuated by a thrust or a pulling force, the failure of the burned plastic nut will seriously endanger the safety of the user, or the article. Problems such as damage from falling from a height, and those to be improved.

[0004]

One of the aims of the present invention is to provide a fireproof telescopic tube for an actuator that protects the user or article by the continuous transmission of the refractory nut and the lead screw when the plastic nut fails.

[0005]

In order to achieve the above object, the present invention provides a fireproof telescopic tube for an actuator, the actuator having a lead screw, the fireproof telescopic tube including a tube body, an adapter, and a plastic screw a cap and a refractory nut, the adapter is connected to one end of the pipe body; the plastic nut is connected to an end of the adapter seat away from the pipe body, and the plastic nut is screwed to the lead screw The refractory nut is received inside the adapter and between the tube body and the plastic nut.

[0006]

This creation also has the effect of providing bidirectional protection to the actuator during thrust or tension. By using the elastic element arrangement, the refractory nut and the lead screw can be prevented from being in transmission contact under normal conditions, which not only reduces the friction loss of the refractory nut, but also prolongs the service life. By means of the arrangement of the buckle, on the one hand, the refractory nut can be provided as abutting contact, and on the other hand, the convenience of assembly can be improved.

[0027]

1‧‧‧Fireproof telescopic tube

[0028]

10‧‧‧ tube body

[0029]

11‧‧‧Fixed holes

[0030]

12‧‧‧Steps

[0031]

20‧‧‧Adapter

[0032]

21‧‧‧ internal thread

[0033]

22‧‧‧ Sockets

[0034]

23‧‧‧ Nut Caps

[0035]

24‧‧‧ buckle ring

[0036]

25‧‧ ‧ blocking

[0037]

30, 30a‧‧‧ plastic nuts

[0038]

31‧‧‧ external thread

[0039]

32‧‧‧ internal thread

[0040]

33‧‧‧Spring pocket

[0041]

34‧‧‧Turning

[0042]

35a‧‧‧Fork

[0043]

40, 40a‧‧ ‧ fire resistant nuts

[0044]

41‧‧‧ internal thread

[0045]

42a‧‧‧fork slot

[0046]

50‧‧‧ buckle

[0047]

60‧‧‧Flexible components

[0048]

8‧‧‧Actuator

[0049]

81‧‧‧Base

[0050]

82‧‧‧Electric motor

[0051]

83‧‧‧External management

[0052]

84‧‧‧ lead screw

[0053]

85‧‧‧ Gear Set

[0054]

86‧‧‧ rear support

【0007】

Fig. 1 is an appearance view of the fireproof telescopic tube of the present invention applied to an actuator combination.

[0008]

Fig. 2 is a sectional view showing the combination of the fireproof telescopic tube of the present invention applied to an actuator.

【0009】

Fig. 3 is an exploded perspective view of the fireproof telescopic tube and the lead screw of the present invention.

[0010]

Fig. 4 is a sectional view showing the combination of the fireproof telescopic tube and the lead screw of the present invention.

[0011]

Fig. 5 is a cross-sectional view showing the state in which the telescopic tube of the present invention is continuously extended outward when the plastic nut of the present invention fails.

[0012]

Fig. 6 is a cross-sectional view showing the state of use when the telescopic tube of the present invention is retracted inwardly after the failure of the plastic nut of the present invention.

[0013]

Figure 7 is a combined cross-sectional view of another embodiment of the fire resistant telescopic tube of the present invention.

[0014]

The detailed description and technical content of the present invention are described below with reference to the drawings, but the drawings are only for reference and explanation, and are not intended to limit the creation.

[0015]

Referring to FIG. 1 and FIG. 2, the present invention provides a fireproof telescopic tube for an actuator, wherein the actuator 8 mainly includes a base 81, a motor 82, an outer tube 83, and a lead screw. 84. A gear set 85 and a rear support 86. The motor 82 is fixed to one side of the base 81. The outer tube 83 is fixed to the base 81 in a direction parallel to the axis of the motor 82. The lead screw 84 is accommodated outside. The inside of the tube 83 is driven by the gear set 85 and the motor 82, wherein the motor 82 can be rotated forward and backward, so that the lead screw 84 can be rotated clockwise or counterclockwise, and the rear support 86 is fixed to the base. The other side of 81 is disposed coaxially with the lead screw 84.

[0016]

Referring to FIG. 2, FIG. 3 and FIG. 4, the fireproof telescopic tube 1 of the present invention mainly comprises a tube body 10, an adapter seat 20, a plastic nut 30 and a refractory nut 40.

[0017]

The tube body 10 is connected to the outer tube 83, and can be made of a metal material such as aluminum alloy or stainless steel. The tube body 10 is provided with a fixing hole 11 at one end and a step portion 12 at the other end. The stepped section 12 is provided with a form of external thread for transformation (not shown).

[0018]

The adapter base 20 can also be made of a metal material such as aluminum alloy or stainless steel. The adapter base 20 of the embodiment is a circular tube, and an inner thread 21 is provided on the right side of the inner side, and a pair of connecting portions 22 are formed on the left side, and the middle portion is formed. A nut receiving groove 23 and a retaining ring receiving groove 24 are formed, and a stopper 25 is formed on a side of the nut receiving groove 23 adjacent to the internal thread 21, wherein the sleeve portion 22 is sleeved on the tubular body 10. The step segments 12 are combined.

[0019]

The plastic nut 30 has a substantially convex shape, and an external thread 31 is formed on the outer surface of the small diameter side to be screwed to the internal thread 21 of the adapter 20, and the plastic nut 30 is The center is formed with an internal thread 32 that is screwed to the lead screw 84, and a spring receiving groove 33 is formed on the inner end surface of the plastic nut 30. Further, a rotation stop is formed on the outside of the plastic nut 30. The portion 34 is configured to be embedded in the outer tube 83 so that the plastic nut 30 does not rotate during the screwing of the lead screw 84.

[0020]

The refractory nut 40 may be made of metal, ceramic or other materials having good fire resistance, and is housed inside the adapter 20 and between the tube 10 and the plastic nut 30, and the refractory nut 40 The center of the center is also formed with an internal thread 41 that is screwed to the lead screw 84.

[0021]

Further, the fireproof telescopic tube 1 of the present invention further includes a buckle 50 which is disposed in the buckle pocket 24 to limit the range of movement of the fire resistant nut 40 on the one hand and the fire resistant nut on the other hand. The end face of 40 serves as abutting contact, and the retaining ring 50 has the convenience of lifting assembly.

[0022]

Further, the fireproof telescopic tube 1 of the present invention further includes an elastic member 60. The elastic member 60 of the present embodiment is a spiral compression spring which is sleeved on the outer circumference of the lead screw 84 and elastically clamped to the refractory snail. Between the cap 40 and the plastic nut 30, it is ensured that the plastic nut 30 and the refractory nut 40 can be maintained at an appropriate spacing distance, and the refractory nut 40 is not in driving contact with the lead screw 84 under normal conditions. Preferably, one end of the elastic member 60 is received in the spring receiving groove 33 of the plastic nut 30, thereby forming a good positioning effect on the elastic member 60.

[0023]

Referring to FIG. 5, the actuator 8 can be mounted on an electric bed, a chair, a table, a window, and the like by a combination of the above components, wherein the fixing hole 11 and the rear bearing of the pipe body 10 are provided. 86 will be fixed by a fixing member such as a bolt (see FIG. 1). When the actuator 8 is performing thrust operation during use, the lead screw 84 rotates in a clockwise direction, and the fireproof telescopic tube 1 will The action of extending outwardly relative to the outer tube 83 causes the plastic nut 30 to fail to burn due to a fire. Since the tube 10 is forced to push the buckle 50 and the refractory nut 40, the refractory nut 40 is forced. In this case, no rotation will occur, and when the lead screw 84 is rotated in the clockwise direction, the fire resistant nut 40, the buckle 50, the adapter 20 and the tubular body 10 are continuously extended toward the outside of the outer tube 83, and The user and the item to be carried are not subjected to an instant rapid drop, thereby providing protection.

[0024]

Referring to FIG. 6, when the actuator 8 is performing the pulling operation during use, the lead screw 84 rotates in the counterclockwise direction, and the fireproof telescopic tube 1 is retracted inwardly relative to the outer tube 83. The action causes the plastic nut 30 to fail to burn due to a fire. At this time, the right end of the fire-resistant nut 40 is attached to the blocking portion 25 of the adapter seat 20, and the fire-resistant nut 40 will not rotate when the force is applied. When the lead screw 84 rotates in the counterclockwise direction, the refractory nut 40, the adapter 20 and the tubular body 10 are continuously pushed together toward the inner side of the outer tube 83, so that the loaded user and the article are not generated. The situation of rapid drop in an instant, and thus play a protective role. Therefore, regardless of the actuation of the actuator 8 by the thrust or the pulling force, the fireproof telescopic tube 1 of the present invention can obtain the protection it deserves.

[0025]

Referring to FIG. 7 , the fireproof telescopic tube of the present invention may be in the form of the embodiment, except that it may be different from the foregoing embodiment in that the end of the plastic nut 30a is formed with a circular fork. 35a, the end surface of the refractory nut 40a facing the plastic nut 30a is provided with a fork groove 42a which is inserted and fixed with the fork portion 35a, thereby ensuring that the plastic nut 30a and the refractory nut 40a can be maintained at an appropriate distance. Normally, the refractory nut 40a is not in driving contact with the lead screw 84, and thus has the equivalent effect of the foregoing embodiment.

[0026]

In summary, the fire-proof telescopic tube for the actuator of the present invention can achieve the intended purpose of use, and solve the lack of the conventional, and because of the novelty and progress, fully meet the requirements of the new patent application. To file an application in accordance with the Patent Law, please check and grant the patent in this case to protect the rights of the creator.

10‧‧‧ tube body

12‧‧‧Steps

20‧‧‧Adapter

21‧‧‧ internal thread

22‧‧‧ Sockets

23‧‧‧ Nut Caps

24‧‧‧ buckle ring

25‧‧ ‧ blocking

30‧‧‧ plastic nut

31‧‧‧ external thread

32‧‧‧ internal thread

33‧‧‧Spring pocket

40‧‧‧Fireproof Nuts

41‧‧‧ internal thread

50‧‧‧ buckle

60‧‧‧Flexible components

84‧‧‧ lead screw

Claims (10)

[Item 1] A fireproof telescopic tube for an actuator, the actuator having a lead screw, the fireproof telescopic tube comprising:
a tube body;
An adapter seat connected to one end of the tube body;
a plastic nut connected to an end of the adapter away from the tube body, the plastic nut is screwed to the lead screw; and a refractory nut is received inside the adapter and Between the tube body and the plastic nut. [Item 2] A fireproof telescopic tube for an actuator according to claim 1, wherein the adapter is a member made of a metal material. [Item 3] The fireproof telescopic tube for an actuator according to claim 2, wherein the adapter is provided with a nut pocket, and the refractory nut is disposed in the nut pocket. [Item 4] A fireproof telescopic tube for an actuator according to claim 3, wherein a stopper is formed on one side of the nut pocket, the stopper being attached to the refractory nut. [Item 5] The fireproof telescopic tube for an actuator according to claim 3, further comprising a buckle, the adapter is provided with a buckle receiving groove, and the buckle is disposed in the buckle receiving groove, The refractory nut is attached to the contact. [Item 6] The fireproof telescopic tube for an actuator according to claim 1, further comprising an elastic member sleeved on an outer circumference of the lead screw and elastically clamped on the refractory nut and the plastic Between the nuts. [Item 7] The fireproof telescopic tube for an actuator according to claim 6, wherein one end of the plastic nut is provided with a spring receiving groove for inserting the elastic member. [Item 8] The fireproof telescopic tube for an actuator according to claim 1, wherein one side of the adapter is provided with an internal thread, and one side of the plastic nut is formed with an outer thread that is screwed to the internal thread. Thread. [Item 9] A fireproof telescopic tube for an actuator according to claim 1, wherein one end of the tube body is provided with a stepped portion, and one side of the adapter base is provided with a set of joints fixed to the stepped section. [Item 10] The fireproof telescopic tube for an actuator according to claim 1, wherein the end of the plastic nut is formed with a fork portion, and the refractory nut is disposed opposite to the fork portion toward an end surface of the plastic nut Connect a fixed one fork slot.