Temperature-sensitive driving mechanism capable of moving in two directions

Abstract

The utility model relates to a temperature-sensitive driving mechanism capable of moving bidirectionally, which comprises a shape memory alloy spring and a stainless steel spring, the size of the shape memory alloy spring is smaller than that of the stainless steel spring, the shape memory alloy spring is a pressure spring, the stainless steel spring is a tension spring, and the shape memory alloy spring is placed in the middle of the stainless steel spring. The shape memory alloy spring and the stainless steel spring form a nested structure, the two springs do not make contact with each other, the top and the bottom of the shape memory alloy spring and the top and the bottom of the stainless steel spring are both fixed to one blocking piece, the shape memory alloy spring is connected with a temperature sensing module, and the initial length of the shape memory alloy spring and the initial length of the stainless steel spring are the same and equal in force value. According to the temperature-sensitive driving mechanism capable of moving in the two directions, the structure that the shape memory alloy spring is matched with the stainless steel spring is adopted, the problem that the force value declines seriously after the shape memory alloy spring is used for a long time is solved, and the service life of the temperature-sensitive driving mechanism is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a temperature sensitive drive mechanism of bidirectional motion. BACKGROUND

[0002] The temperature sensitive drive mechanism is usually made of a spring. When the temperature control spring is exposed to an environment with changing temperature, the temperature sensitive material will expand due to the increase of temperature, so that the spring is compressed or stretched. In this way, the force of the spring can be adjusted according to the change of temperature. When the temperature decreases, the temperature sensitive material shrinks, and the spring returns to its original state.

[0003] The temperature sensitive drive mechanism is widely used in devices and systems that need to adjust the force according to the change of temperature. For example, the temperature control spring can be used in temperature control devices, thermostats, thermistors, and hot chambers. However, the current temperature sensitive drive mechanism of bidirectional motion uses a shape memory alloy spring as a drive mechanism alone, but the performance stability of the shape memory alloy spring is not good, and the force value decays seriously after multiple uses, which leads to a short service life of the temperature sensitive drive mechanism. SUMMARY

[0004] The utility model provides a temperature sensitive drive mechanism of bidirectional motion, which can avoid the problem of serious force value decay and prolong the service life of the temperature sensitive drive mechanism.

[0005] The utility model is characterized in that:

[0006] A temperature sensitive drive mechanism of bidirectional motion, comprising a shape memory alloy spring and a stainless steel spring, the size of the shape memory alloy spring is smaller than that of the stainless steel spring, and the shape memory alloy spring is a compression spring, while the stainless steel spring is a tension spring. The shape memory alloy spring is placed in the middle of the stainless steel spring, forming a nested structure. The two springs do not contact each other. The top and bottom of the shape memory alloy spring and the stainless steel spring are fixed with a barrier piece. A temperature sensing module is connected to the shape memory alloy spring. The initial length of the shape memory alloy spring is the same as that of the stainless steel spring, and the force value is equal.

[0007] When the temperature sensing module measures that the ambient temperature is lower than the set temperature, the force value of the shape memory alloy spring decreases. At this time, the shape memory alloy spring will be deformed by the extrusion of the stainless steel spring, thereby driving the upper and lower barrier pieces to approach and compress the entire temperature sensitive drive mechanism.

[0008] When the temperature sensing module measures that the ambient temperature is higher than the set temperature, the force value of the shape memory alloy spring increases. At this time, the shape memory alloy spring will extrude the stainless steel spring, causing it to deform, thereby driving the upper and lower barrier pieces to move away and stretch the entire temperature sensitive drive mechanism.

[0009] The beneficial effects of the utility model are:

[0010] This bidirectional motion temperature-sensitive drive mechanism adopts a structure that combines a shape memory alloy spring and a stainless steel spring, avoiding the problem of serious force degradation of the shape memory alloy spring after long-term use, and extending the service life of the temperature-sensitive drive mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present utility model.

[0012] Figure 2 This is a schematic diagram of a temperature-sensitive drive mechanism that moves in both directions when the ambient temperature is lower than the set temperature.

[0013] Figure 3 This is a schematic diagram of a temperature-sensitive drive mechanism that moves in both directions when the ambient temperature is higher than the set temperature.

[0014] In the figure: shape memory alloy spring 1, stainless steel spring 2, barrier plate 3. DETAILED DESCRIPTION

[0015] See also Figure 1 The utility model relates to a temperature-sensitive drive mechanism for bidirectional motion, including a shape memory alloy spring 1 and a stainless steel spring 2. The shape memory alloy spring 1 is an SMA spring. The size of the shape memory alloy spring 1 is slightly smaller than that of the stainless steel spring 2, and the shape memory alloy spring 1 is a compression spring, and the stainless steel spring 2 is a tension spring. The shape memory alloy spring 1 is placed in the middle of the stainless steel spring 2 to form a nested structure. The two springs do not contact each other. The top and bottom of the shape memory alloy spring 1 and the stainless steel spring 2 are fixed to a barrier piece 3.

[0016] The shape memory alloy spring 1 is connected to a temperature sensing module. When the shape memory alloy spring 1 is manufactured, an initial set temperature and initial shape are preset. The initial length of the shape memory alloy spring 1 is the same as the initial length of the stainless steel spring 2, and the force values ​​are equal.

[0017] like Figure 2 When the temperature sensing module measures that the ambient temperature is lower than the set temperature, the force of the shape memory alloy spring 1 decreases. At this time, the shape memory alloy spring 1 will be squeezed and deformed by the stainless steel spring 2, thereby driving the upper and lower barrier plates 3 closer together and compressing the entire temperature sensitive drive mechanism; Figure 3 When the temperature sensing module measures that the ambient temperature is higher than the set temperature, the force of the shape memory alloy spring 1 increases. At this time, the shape memory alloy spring 1 will squeeze the stainless steel spring 2, causing it to deform, thereby driving the upper and lower barrier pieces 3 away from each other and stretching the entire temperature-sensitive drive mechanism.

Claims

1. A temperature-sensitive drive mechanism for bidirectional motion, characterized by: It includes a shape memory alloy spring and a stainless steel spring. The shape memory alloy spring is smaller than the stainless steel spring, and the shape memory alloy spring is a compression spring, and the stainless steel spring is a tension spring. The shape memory alloy spring is placed in the middle of the stainless steel spring to form a nested structure. The two springs do not contact each other. The top and bottom of the shape memory alloy spring and the stainless steel spring are fixed with a barrier piece. The shape memory alloy spring is connected to a temperature sensing module. The initial length of the shape memory alloy spring is the same as the initial length of the stainless steel spring, and the force value is equal.

2. The temperature-sensitive driving mechanism for bidirectional motion according to claim 1, characterized in that: When the temperature sensing module measures that the ambient temperature is lower than the set temperature, the force of the shape memory alloy spring decreases. At this time, the shape memory alloy spring will be squeezed and deformed by the stainless steel spring, thereby driving the upper and lower barrier plates closer and compressing the entire temperature-sensitive drive mechanism.

3. The temperature-sensitive driving mechanism for bidirectional motion according to claim 1, characterized in that: When the temperature sensing module measures that the ambient temperature is higher than the set temperature, the force of the shape memory alloy spring increases. At this time, the shape memory alloy spring will squeeze the stainless steel spring, causing it to deform, thereby driving the upper and lower barrier plates away and stretching the entire temperature-sensitive drive mechanism.

Images