阅读说明：本技术 一种温感驱动机构 (Temperature sensing driving mechanism ) 是由 李昌刚 刘全发 胡俊杰 徐清 于 2020-11-30 设计创作，主要内容包括：一种温感驱动机构,其特征在于：包括一支架、设置在支架上的一兜体和一液压系统,所述液压系统包括管路,所述管路的输入端与兜体密闭连通,所述兜体和液压系统的管路内充满相互连通的液体,所述兜体外还设有用于将兜体夹设其间的上半罩体和下半罩体,所述上半罩体通过竖直设置在兜体下部左右两侧的两个及以上的双向形状记忆合金件与支架相连,所述下半罩体通过竖直设置在兜体上部左右两侧的两个及以上的双向形状记忆合金件与支架相连,所述液压系统的输出端用于与后端机构相连。该温感驱动机构由双向形状记忆合金件驱动、且双向形状记忆合金件可按需设置在离后端机械机构一段距离处、能正确感知环境温度。(A temperature sensing driving mechanism is characterized in that: including a support, set up a pocket body and a hydraulic system on the support, hydraulic system includes the pipeline, the input and the airtight intercommunication of pocket body of pipeline, the liquid that communicates each other is full of in the pocket body and hydraulic system's the pipeline, the pocket body still is equipped with outward and is used for establishing the first cover body and the second cover body between it with the pocket body clamp, the first cover body links to each other with the support through vertical setting at two and above two-way shape memory alloy spare of pocket body lower part left and right sides, the second cover body links to each other with the support through vertical setting at two and above two-way shape memory alloy spare of pocket body upper portion left and right sides, hydraulic system's output is used for linking to each other with rear end mechanism. The temperature sensing driving mechanism is driven by the two-way shape memory alloy piece, and the two-way shape memory alloy piece can be arranged at a distance from the rear end mechanical mechanism according to requirements, so that the ambient temperature can be correctly sensed.)

1. A temperature sensing driving mechanism is characterized in that: including a support (1), set up a pocket body (2) and a hydraulic system (3) on support (1), hydraulic system (3) include pipeline (4), the input and the pocket body (2) of pipeline (4) are airtight to be communicate, be full of the liquid that communicates each other in the pipeline (4) of the pocket body (2) and hydraulic system (3), the pocket body (2) still is equipped with outward and is used for pressing from both sides the pocket body (2) and establish first cover body (7) and second cover body (8) between them, the pocket body (2) are made for elastic material, first cover body (7) and second cover body (8) are flexible and tensile material make, first cover body (7) link to each other with support (1) through two and more than two-way shape memory alloy spare (9) of vertical setting in the left and right sides of pocket body (2) lower part for make first cover body (7) extrude downwards when two-way shape memory alloy spare (9) in lower part rise along with the temperature and reach and shorten phase transition temperature and make first cover body (7) extrude downwards The pocket body (2), the lower half cover body (8) links to each other with support (1) through two and more two-way shape memory alloy spare (9) of vertical setting in the pocket body (2) upper portion left and right sides for make the lower half cover body (8) upwards extrude the pocket body (2) when two-way shape memory alloy spare (9) on upper portion rise to phase transition temperature and shorten along with the temperature, the output of hydraulic system (3) is used for linking to each other with rear end mechanism, so that the extrusion force that is used in the pocket body (2) conveys rear end mechanism through hydraulic system (3).

2. A temperature-sensitive drive mechanism according to claim 1, wherein: the output end of the pipeline (4) of the hydraulic system (3) faces upwards, a piston (6) is arranged above the liquid level in the output end, the output end of the hydraulic system (3) is used for being connected with a rear end mechanism, and the piston (6) of the hydraulic system (3) is used for being connected with the rear end mechanism.

3. A temperature-sensitive drive mechanism according to claim 1, wherein: the pocket body (2) is made of rubber materials.

4. A temperature-sensitive drive mechanism according to claim 1, wherein: the upper half cover body (7) and the lower half cover body (8) are both net bodies.

5. A temperature-sensitive drive mechanism according to claim 2, wherein: the caliber of the input end of the pipeline (4) of the hydraulic system (3) is smaller than that of the output end.

Technical Field

The invention relates to the technical field of driving devices, in particular to a temperature sensing driving mechanism.

Background

A temperature sensing driving mechanism based on two-way shape memory alloy is currently available, which senses the temperature change to deform the two-way shape memory alloy, and the deformation generates a stroke change, so that the movement of a rear end mechanism can be driven, for example, the opening and closing of a door/window can be driven after the door/window is connected with the door/window. The temperature sensing driving mechanism based on the two-way shape memory alloy does not need electric power driving, saves energy and electricity, has good reliability and low cost, and is particularly suitable for occasions with inconvenient field power taking and high temperature and high humidity, such as a greenhouse.

However, the existing temperature-sensing driving mechanism still has the following technical problems: the bidirectional shape memory alloy piece is used as a sensor and an actuator, is directly connected with the rear end mechanism and is a solid-solid connection mode, the rear end mechanism is arranged where the bidirectional shape memory alloy piece is arranged, and therefore when the bidirectional shape memory alloy piece is applied to the opening and closing of a door/window of a certain closed space, for example, when a skylight of a greenhouse is opened and closed, the temperature of a local area close to the skylight is firstly reduced by cold air entering from the outside after the skylight is opened, so that the bidirectional shape memory alloy piece can sense the temperature reduction and can deform to close the skylight, but actually, the whole temperature in the greenhouse is not reduced at all, and the bidirectional shape memory alloy piece cannot sense the ambient temperature at all.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: a temperature sensing driving mechanism is provided which is driven by a two-way shape memory alloy member, and the two-way shape memory alloy member can be disposed at a distance from a rear end mechanical mechanism as required, and can sense the ambient temperature accurately.

The technical solution of the invention is as follows: a temperature sensing driving mechanism is characterized in that: the bag comprises a support, a bag body and a hydraulic system, wherein the bag body and the hydraulic system are arranged on the support, the hydraulic system comprises a pipeline, the input end of the pipeline is communicated with the bag body in a closed mode, the bag body and the hydraulic system are filled with liquid which is communicated with each other, an upper half cover body and a lower half cover body which are used for clamping the bag body are further arranged outside the bag body, the bag body is made of elastic materials, the upper half cover body and the lower half cover body are made of flexible and tensile materials, the upper half cover body is connected with the support through two or more two-way shape memory alloy pieces which are vertically arranged on the left side and the right side of the lower portion of the bag body, the upper half cover body is used for downwards extruding the bag body when the two-way shape memory alloy pieces on the lower portion reach phase change temperature along with temperature rise and shorten, and the lower half cover body is connected with the support through two or more than two-, the two-way shape memory alloy part used for enabling the lower half cover body to upwards extrude the pocket body when the two-way shape memory alloy part on the upper portion reaches the phase change temperature along with the temperature rise and shortens, and the output end of the hydraulic system is used for being connected with the rear end mechanism, so that extrusion force acting on the pocket body is transmitted to the rear end mechanism through the hydraulic system.

After adopting the structure, the invention has the following advantages:

the temperature-sensing driving mechanism of the invention abandons the solid-solid connecting structure of the traditional bidirectional shape memory alloy part directly connected with the rear end mechanism, but transmits the force of the bidirectional shape memory alloy part to the required far end without distance limitation through the middle force transmission part filled with liquid, which is a solid-liquid-solid connecting structure; when the temperature rises to reach the phase change temperature of the two-way shape memory alloy part, the two-way shape memory alloy parts at the upper part and the lower part deform and shorten, and the bag body is wrung and communicated with a pipeline of a hydraulic system; the bidirectional shape memory alloy part is not directly connected with the rear end mechanism but is connected with the rear end mechanism through the hydraulic system, so that the bidirectional shape memory alloy part does not need to be close to the rear end mechanism, but can be arranged at a position away from the rear end mechanism by a certain distance after the length of a pipeline of the hydraulic system is changed according to needs, and therefore when the bidirectional shape memory alloy part is applied to the occasions of opening and closing a door/window in a certain closed space, the bidirectional shape memory alloy part cannot be influenced by local environment temperature change to generate false operation immediately, but can sense the temperature change after the overall environment temperature is stable, and the sensed temperature state is a relatively stable, real and accurate temperature state; in addition, four two-way shape memory alloy parts are symmetrically arranged at the upper, lower, left and right directions of the pocket body, and are in a form of two force couplings when seen from the diagonal direction, so that the force output effect is better.

Furthermore, the output end of the pipeline of the hydraulic system faces upwards, a piston is arranged above the liquid level in the output end, and the output end of the hydraulic system is used for being connected with the rear end mechanism, namely the piston of the hydraulic system is used for being connected with the rear end mechanism. The hydraulic system has a very simple structure, the extrusion force of the pocket body can be transmitted to the piston through incompressible liquid only by utilizing a closed pipeline and adding the piston, the piston drives the rear end mechanism to move, and when the two-way shape memory alloy is restored, because the extrusion force exerted on the pocket body disappears, the pocket body restores the original shape under the action of the self elasticity, the inner space of the pocket body is enlarged again, negative pressure is formed instantly to suck liquid in a pipeline of a hydraulic system, and the output end of the pipeline of the hydraulic system faces upwards, so that the liquid level in a hydraulic cylinder below a piston is higher than the liquid level at the highest position in the pocket body, the liquid flows back into the pocket body quickly due to the self gravity and the pressure of the upper piston, so that the liquid levels at the two ends are positioned at the same horizontal plane again, the transmission of hydraulic pressure is thus very fast and reliable whether the bag is compressed or restored.

Further, the pocket is made of a rubber material. The rubber has better sealing property and elasticity and is easy to process.

Furthermore, the upper half cover body and the lower half cover body are both net bodies. The net body saves materials, and can reliably cover outside the bag body and generate extrusion force to the bag body.

Further, the caliber of the input end of the pipeline of the hydraulic system is smaller than that of the output end. The arrangement can amplify the hydraulic pressure output to the piston of the output end, so that enough driving force can be generated to drive the rear end mechanism without using a bidirectional shape memory alloy part with a large sectional area, the material is saved, and the cost is reduced.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a temperature-sensing driving mechanism according to the present invention;

FIG. 2 is a schematic structural view of the temperature-sensing driving mechanism of the present invention applied to a greenhouse;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of the skylight of FIG. 3B when the skylight is closed;

FIG. 5 is an enlarged view of a portion of the skylight of FIG. 3B when the skylight is opened;

in the figure: 1-support, 2-pocket, 3-hydraulic system, 4-pipeline, 6-piston, 7-upper half cover body, 8-lower half cover body, 9-bidirectional shape memory alloy piece, 10-transmission mechanism, 11-skylight, 14-fixing part, 15-sliding part, 16-rod part, 17-head part, 18-chute, 19-supporting rod, 20-sliding block, 21-rotating shaft, 22-lower limiting device, 23-upper limiting device, 24-telescopic rod, 25-frame body and 26-sleeve.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example (b):

as shown in fig. 1, a temperature sensing driving mechanism comprises a support 1, a pocket 2 and a hydraulic system 3, the pocket 2 and the hydraulic system 3 are disposed on the support 1, the hydraulic system 3 includes a pipeline 4, an input end of the pipeline 4 is hermetically communicated with the pocket 2, in this embodiment, the pipeline 4 of the hydraulic system 3 is a U-shaped pipe, the pipeline 4 may be in other shapes as long as the pocket 2 and the pipeline 4 form a communicating vessel to form the closed hydraulic system 3, the pipeline 4 of the pocket 2 and the hydraulic system 3 is filled with a mutually communicated liquid, the filled liquid may be water, the pocket 2 is further provided with an upper half cover 7 and a lower half cover 8 for sandwiching the pocket 2 therebetween, the pocket 2 is made of an elastic material, the upper half cover 7 and the lower half cover 8 are made of a flexible and tensile material, the upper half cover 7 is connected with the support 1 through two or more two-way shape memory alloy members 9 vertically disposed at the left and right sides of the lower portion of the pocket 2, the upper half cover body 7 is used for downwards extruding the pocket body 2 when the bidirectional shape memory alloy part 9 at the lower part reaches the phase change temperature along with the temperature rise and shortens, the lower half cover body 8 is connected with the bracket 1 through two or more bidirectional shape memory alloy parts 9 vertically arranged at the left side and the right side of the upper part of the pocket body 2 and is used for upwards extruding the pocket body 2 by the lower half cover body 8 when the bidirectional shape memory alloy part 9 at the upper part reaches the phase change temperature along with the temperature rise and shortens, and the output end of the hydraulic system 3 is used for being connected with a rear end mechanism so that the extrusion force acting on the pocket body 2 is transmitted to the rear end mechanism through the hydraulic system 3; preferably, an even number of the upper two-way shape memory alloy members 9 and the lower two-way shape memory alloy members 9 are provided, for example, 2, 4, etc., and when 2 are provided, one is provided on the left side and one is provided on the right side of the pocket 2, and when 4 are provided, 2 are provided on the left side and 2 are provided on the right side of the pocket 2.

The temperature-sensing driving mechanism of the invention abandons the solid-solid connecting structure of the traditional bidirectional shape memory alloy part 9 directly connected with the rear end mechanism, but transmits the force of the bidirectional shape memory alloy part 9 to the required far end without distance limitation through the middle force transmission part filled with liquid, which is a solid-liquid-solid connecting structure; when the temperature rises to reach the phase change temperature of the two-way shape memory alloy part 9, the two-way shape memory alloy part 9 on the upper part and the lower part deforms and shortens, the bag body 2 is wrung, the bag body 2 is communicated with the pipeline 4 of the hydraulic system 3, according to the Pascal principle, the extrusion force on one side of the bag body 2 can be transmitted to each point of incompressible liquid in the pipeline 4 of the hydraulic system 3, the required hydraulic pressure is formed in the hydraulic system 3, and the hydraulic pressure is output and transmitted to the rear end mechanism, so that the movement of the rear end mechanism can be driven; because the two-way shape memory alloy part 9 is not directly connected with the rear end mechanism, but is connected with the rear end mechanism through the hydraulic system 3, the two-way shape memory alloy part 9 does not need to be close to the rear end mechanism, but can be arranged at a certain distance from the rear end mechanism after the length of a pipeline of the hydraulic system 3 is changed according to needs, so that when the two-way shape memory alloy part 9 is applied to the occasions of opening and closing a door/window of a certain closed space, the two-way shape memory alloy part 9 cannot be immediately influenced by the local environment temperature change to generate false operation, but can sense the temperature change after the whole environment temperature is stable, and the sensed temperature state is a relatively stable, real and accurate temperature state; in addition, the four two-way shape memory alloy parts 9 are symmetrically arranged at the upper, lower, left and right directions of the pocket body 2, and are in a form of two force couplings when seen from the diagonal direction, so that the force output effect is better.

Further, the output end of the pipeline 4 of the hydraulic system 3 faces upward, a piston 6 is arranged above the liquid level in the output end, and the output end of the hydraulic system 3 is used for being connected with a rear end mechanism, namely the piston 6 of the hydraulic system 3 is used for being connected with the rear end mechanism. The hydraulic system 3 has a very simple structure, only a closed pipeline 4 is needed to be utilized to add a piston 6, the extrusion force of the bag body 2 can be transmitted to the piston 6 through incompressible liquid, then the piston 6 drives a rear end mechanism to move, and when the two-way shape memory alloy recovers the original shape, the bag body 2 recovers the original shape under the action of self elasticity because the extrusion force applied to the bag body 2 disappears, the inner space of the bag body 2 is enlarged again, negative pressure is formed instantly to suck the liquid in the pipeline 4 of the hydraulic system 3, and the output end of the pipeline 4 of the hydraulic system 3 faces upwards, so that the liquid level in a liquid cylinder below the piston 6 is higher than the liquid level at the highest position in the bag body 2, the liquid level at the two ends is in the same horizontal plane again because of self gravity and the pressure of the piston 6 above, therefore, no matter whether the bag body 2 is extruded or the bag body 2 recovers the original shape, the transmission of hydraulic pressure is very fast and reliable.

Further, the pocket 2 is made of a rubber material. The rubber has better sealing property and elasticity and is easy to process.

Further, the upper half cover body 7 and the lower half cover body 8 are both net bodies. The dictyosome material saving, and can reliably cover outside the pocket body 2 and to the extrusion force of the production of the pocket body 2.

Further, the aperture of the input end of the pipeline 4 of the hydraulic system 3 is smaller than that of the output end. The arrangement can amplify the hydraulic pressure output to the piston 6 of the output end, thereby generating enough driving force to drive the rear end mechanism without using the bidirectional shape memory alloy part 9 with a large sectional area, saving materials and reducing cost.

The temperature sensing driving mechanism can be used in various places such as greenhouses, warehouses, farms and the like, and the following detailed explanation is made for the situation of being applied to the greenhouses. Referring to fig. 2-5, the temperature-sensing driving mechanism of the invention is illustrated to be applied to the opening and closing of the skylight of the greenhouse to realize the intelligent ventilation of the greenhouse. The specific implementation mode is as follows: the piston 6 of the temperature-sensing driving mechanism is connected with the skylight 11 through a transmission mechanism 10, and is used for transmitting thrust to the transmission mechanism 10 by the piston 6 when the pocket 2 is pressed up and down so as to drive the skylight 11 to open; in the initial state, the two-way shape memory alloy part 9 is not deformed, the skylight 11 is just in the closed state, when the temperature in the shed rises, the two-way shape memory alloy part 9 shortens, the pocket body 2 is simultaneously extruded by the upper half cover body 7 and the lower half cover body 8, the piston 6 moves upwards and drives the skylight 11 to be opened through the transmission mechanism 10.

Further, the transmission mechanism 10 is a lever mechanism. The lever mechanism has simple structure and reliable power transmission, and can change the force and direction according to actual requirements.

Further, the lever mechanism comprises an extensible rod 24 and a support rod 19, the extensible rod 24 comprises a fixing portion 14 and a sliding portion 15, one end of the fixing portion 14 is fixed with the shed body, one end of the sliding portion 15 is fixed with the piston 6, the other end of the sliding portion 15 is slidably sleeved with the other end of the fixing portion 14, one end of the support rod 19 is hinged to the sliding portion 15, the other end of the support rod is hinged to one side of the skylight 11, and a guide structure used for enabling the support rod 19 to support the skylight 11 and fall the skylight 11 when the sliding portion 15 goes up and down is further arranged between the support rod 19 and the sliding portion 15. The lever mechanism has simple structure and reliable work.

Further, the guiding structure includes a frame body 25, a sliding block 20 is disposed in the middle of the supporting rod 19, one side of the frame body 25 is in up-down sliding fit with the sliding block 20 of the supporting rod 19, and the other side is in left-right sliding fit with the sliding part 15. This guide structure simple structure, the reliable operation not only has the guide effect, but also can strengthen being connected of bracing piece 19 and sliding part 15, makes overall structure more firm, and is better to skylight 11's supporting role.

Further, the frame body 25 is T-shaped, the T-shaped frame body includes a head portion 17 and a rod portion 16, the head portion 17 of the T-shaped frame body is provided with a sliding groove 18 which is in up-and-down sliding fit with the sliding block 20 of the supporting rod 19, and the sliding portion 15 of the telescopic rod 24 is provided with a sleeve 26 which is in left-and-right sliding fit with the rod portion 16 of the T-shaped frame body. The frame body has simple and light structure and small occupied space, and is conveniently matched with the telescopic rod 24 and the supporting rod 19 for use.

Further, a rotating shaft 21 is disposed at a central axis of the skylight 11, and two ends of the rotating shaft 21 may be supported by bearings. This setting can make when the power is acted on one side of skylight 11, pushes away skylight 11 easily, and when opening moreover, half of skylight 11 upwards opens, and half downwards opens, and the ventilation effect is better.

Furthermore, an upper limit device 23 and a lower limit device 22 are respectively arranged on two sides of the canopy body close to the skylight 11, and are used for enabling the upper limit device 23 to abut against the upper surface of the corresponding side of the skylight 11 and enabling the lower limit device 22 to abut against the lower surface of the other side of the skylight 11 when the skylight 11 is closed. This arrangement allows the sunroof 11 to be reliably closed when it is dropped.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.