Temperature sensing driver

Abstract

The utility model discloses a temperature-sensing driver, which belongs to the technical field of temperature-sensing elements and comprises a mounting seat with a through hole; the ejector rod penetrates through the through hole and is movably connected with the mounting base, the ejector rod comprises a first end and a second end which are oppositely arranged, a limiting protrusion is arranged between the first end and the second end, and the limiting protrusion is close to the first end relative to the mounting base; and the memory alloy spring is arranged between the limiting bulge and the mounting seat, and the memory alloy spring is configured to be capable of driving the mounting seat to move in the direction far away from the limiting bulge. Compared with the prior art, the temperature sensing driver is simple in structure and low in cost, can directly replace a wax package, does not need to replace other elements, and has installation universality and convenience.

Description

TECHNICAL FIELD

[0001] The utility model belongs to driver technical field, especially relate to a temperature sensing driver. BACKGROUND

[0002] Temperature sensing driver is a kind of device that can automatically produce mechanical movement according to the change of ambient temperature or medium temperature, is widely used in temperature control equipment, automobile system, industrial equipment and household appliance etc.

[0003] Wax package, also known as paraffin wax temperature package, is the most widely used mechanical temperature sensing driving element in the world. Its structure is to inject mixed liquid of paraffin wax and copper powder into a copper pipe, then add a layer of sealing film at the pipe opening, and install a top rod. When the mixed liquid in the copper pipe absorbs heat from the outside and expands, it pushes the top rod out, realizing temperature sensing driving function.

[0004] However, as a traditional temperature sensing element, wax package has some natural drawbacks. On the one hand, wax package needs to heat the mixed liquid in the whole copper pipe to produce enough expansion, which requires absorbing a large amount of heat, resulting in that it cannot respond quickly to small temperature fluctuations, and the driving action has obvious hysteresis. On the other hand, the top rod and the copper mounting seat need to maintain a precise fit gap, but in actual use, the scale and small particles in the temperature sensing medium and other foreign matters are easy to block these gaps, causing the wax package to be stuck and fail. In addition, under repeated cold and hot changes, the mixed liquid of paraffin wax and copper powder will stratify due to the difference in specific gravity, which greatly affects the service life of the wax package. Although wax package has the above problems, due to its long-term and widespread application, the existing many driver structures are designed around wax package, which makes it face compatibility obstacles when directly replaced by new temperature sensing elements, increasing the replacement cost and technical difficulty. SUMMARY

[0005] To solve the above technical problems, the utility model provides a temperature sensing driver which can directly replace wax package.

[0006] The technical scheme of the utility model is:

[0007] The utility model provides a temperature sensing driver, which comprises:

[0008] The mounting seat has a through hole;

[0009] The top rod penetrates through the through hole and is movably connected with the mounting seat, and the top rod comprises a first end and a second end arranged oppositely, a limiting protrusion is arranged between the first end and the second end, and the limiting protrusion is arranged close to the first end relative to the mounting seat;

[0010] A memory alloy spring is arranged between the limiting protrusion and the mounting base, and is configured to drive the mounting base to move away from the limiting protrusion.

[0011] Further, the second end is provided with a limiting member for limiting the mounting base.

[0012] Further, the first end is in abutment with a first limiting member, and is limited and fixed by the first limiting member in the moving direction of the mounting base.

[0013] Further, a second limiting member and a return spring are further included, the second limiting member is arranged close to the second end, and the return spring is arranged between the second limiting member and the mounting base, and is configured to drive the mounting base to move towards the limiting protrusion.

[0014] Further, a to-be-driven member is further included, the mounting base is provided with a connecting portion, and the to-be-driven member is provided with a matching portion connected with the connecting portion.

[0015] Further, the to-be-driven member is provided with a first extension wall extending outward from the matching portion, one end of the return spring is in abutment with the second limiting member, and the other end is in abutment with the first extension wall.

[0016] Further, the first extension wall is further provided with a limiting wall connected with the first extension wall and surrounding the outer periphery of the matching portion, and the matching portion, the first extension wall and the limiting wall jointly surround to form an abutment groove for accommodating the return spring.

[0017] Further, the first extension wall is provided with a liquid flow hole for liquid to pass through.

[0018] Further, the mounting base is provided with a second extension wall extending outward from the connecting portion, one end of the return spring is in abutment with the second limiting member, and the other end is in abutment with the second extension wall.

[0019] Further, the memory alloy spring has a compressed state and a stretched state, the limiting member and the limiting protrusion have a first distance, and the difference between the first distance and the thickness of the mounting base is greater than or equal to the length of the memory alloy spring in the stretched state.

[0020] The beneficial technical effects of the utility model are as follows:

[0021] The temperature sensing driver cancels the shell, and a new temperature sensing driver structure is formed by the combination of the mounting seat, the top rod and the memory alloy spring, which is simple in structure and low in cost. The mounting seat is arranged between the second end and the limiting protrusion, and the memory alloy spring is arranged between the mounting seat and the limiting protrusion. When the memory alloy spring senses temperature rise, the first end of the top rod is limited and fixed, so that the memory alloy spring can drive the mounting seat and the to-be-driven member arranged on the mounting seat to move away from the limiting protrusion, thereby directly replacing the wax package, having high universality and installation convenience, and when upgrading or maintaining the equipment, the original driving structure does not need to be complicatedly changed, only the wax package needs to be directly taken down, and the temperature sensing driver of the utility model is used, the replacement cost and time cost are greatly reduced, and the equipment maintenance and upgrading efficiency is improved. In addition, the moving direction of the temperature sensing driver of the utility model is consistent with that of the original wax package driving when the temperature rises and falls, so that when the equipment is replaced, the mechanical parts and the control system connected thereto do not need to be re-adjusted or modified, the compatibility and stability of the equipment are ensured, the system adaptation problem caused by replacement of the driving element is reduced, and the normal operation and control accuracy of the equipment are ensured.

[0022] By arranging the limiting protrusion on the top rod, the movement distance of the mounting seat can be effectively limited to prevent excessive displacement during movement, thereby ensuring that the movement range of the mounting seat is always controlled within the designed range. In addition, the limiting protrusion can also provide stable support force for the memory alloy spring, ensuring that the spring can normally play its elastic role during work. By changing the distance between the limiting protrusion and the second end of the top rod, the initial position and movement range of the mounting seat can be flexibly adjusted, thereby optimizing the working performance and adaptability of the temperature sensing driver. Specifically, adjusting the position of the limiting protrusion can change the pre-tightening force and deformation amount of the memory alloy spring, affecting its response sensitivity and driving force to temperature changes. This design enables the temperature sensing driver to achieve accurate temperature control under different working conditions, meeting diversified application requirements. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structure schematic view of the temperature sensing driver according to the preferred embodiment of the utility model;

[0024] Figure 2 is Figure 1 is a sectional view of the temperature sensing driver in a low-temperature state;

[0025] Figure 3 is Figure 1 is a sectional view of the temperature sensing driver in a high-temperature state.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] Temperature driver 100, mounting seat 10, through hole 11, connecting part 12, memory alloy spring 20, top rod 30, first end 31, second end 32, limiting protrusion 33, limiting part 34, reset spring 40, to-be-driven part 50, first extension wall 51, limiting wall 52, first limiting part 61, second limiting part 62. DETAILED DESCRIPTION

[0028] In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the specification, the specific embodiments of the present application will be further described in detail below in combination with the drawings and examples, and the following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0029] Please refer to Figures 1 to 3 As shown in the accompanying drawings, the present application provides a temperature driver 100, which comprises a mounting seat 10, a top rod 30, a memory alloy spring 20 and a reset spring 40.

[0030] The mounting seat 10 is used to connect the memory alloy spring 20 and the to-be-driven part 50. The mounting seat 10 comprises a base and a connecting part 12 arranged on the base and used to connect the to-be-driven part 50. By arranging the connecting part 12, the stable connection between the driver and the to-be-driven part 50 is ensured. Optionally, in the present embodiment, the connecting part 12 is externally threaded, and the reliable connection of the mounting seat 10 and the to-be-driven part 50 is realized through threaded connection. In other embodiments, the connecting part 12 can also have other structures, such as buckles, or interference fit, etc. The present application does not limit this. Preferably, the mounting seat 10 is installed through threaded connection and interference fit, so as to correspond to two commonly used mounting interfaces of the paraffin temperature bag respectively. The arrangement of the connecting part 12 not only enables the temperature driver 100 to be connected with the to-be-driven part 50 conveniently and quickly, but also ensures that the movement direction of the to-be-driven part 50 is consistent with the mounting seat 10, thereby realizing the accurate control and stable operation of the equipment.

[0031] The mounting seat 10 is provided with a through hole 11, and the through hole 11 penetrates the base and the connecting part 12. By arranging the through hole 11, after the top rod 30 passes through the through hole 11, the mounting seat 10 is in sliding connection with the top rod 30, thereby providing a basis for the mounting seat 10 to drive the to-be-driven part 50 to move.

[0032] The top rod 30 penetrates the through hole 11 and is movably connected with the mounting base 10. The top rod 30 comprises a first end 31 and a second end 32 arranged oppositely, and a limiting protrusion 33 is arranged between the first end 31 and the second end 32, and the limiting protrusion 33 is arranged close to the first end 31 relative to the mounting base 10. By arranging the limiting protrusion 33 on the top rod 30, the movement distance of the mounting base 10 is limited, so that the mounting base 10 is prevented from moving excessively during the movement, and the movement range of the mounting base 10 is ensured to be within the designed range. In addition, by changing the distance between the limiting protrusion 33 and the second end 32 of the top rod 30, the initial position and the movement range of the mounting base 10 can be flexibly adjusted, and thus the working performance and adaptability of the temperature sensing driver 100 are optimized.

[0033] Further, the second end 32 of the top rod 30 is provided with a limiting piece 34 for limiting the movement of the mounting base 10. By arranging the limiting piece 34, the movement distance of the mounting base 10 is limited, so that the mounting base 10 is prevented from moving excessively during the movement and deviating from the top rod 30. Preferably, the second end 32 of the top rod 30 is provided with a groove, and the limiting piece 34 is a snap spring arranged in the groove. By designing the groove and the snap spring, the top rod 30 is conveniently disassembled to facilitate the penetration of the top rod 30 through the through hole 11 of the mounting base 10. Of course, in other embodiments, the limiting piece 34 can also have other structures.

[0034] Further, the temperature sensing driver 100 further comprises a first limiting piece 61 for limiting the movement of the top rod 30. The first limiting piece 61 abuts against the first end 31 of the top rod 30, and in the movement direction of the mounting base 10, the top rod 30 is limited and fixed by the first limiting piece 61 to limit the movement of the top rod 30 in the axial direction, so that when the elastic force of the memory alloy spring 20 becomes larger, the mounting base 10 and the driven part 50 can only be moved in the direction away from the limiting protrusion 33, so that the driving direction of the temperature sensing driver 100 is kept consistent with the movement direction before the wax package.

[0035] The memory alloy spring 20 is arranged between the limiting protrusion 33 and the mounting base 10, and the memory alloy spring 20 is configured to drive the mounting base 10 to move in the direction away from the limiting protrusion 33. The memory alloy spring 20 is made of an alloy material having a shape memory effect, and the crystal grains of the alloy material are austenite in a high-temperature state, and the shear modulus and the elastic modulus are relatively high, and the crystal grains of the alloy material are martensite in a low-temperature state, and the shear modulus and the elastic modulus are relatively low. The elastic force of the memory alloy spring 20 in the high-temperature state is several times larger than that in the low-temperature state, so that the memory alloy spring 20 can sense the external temperature and thus make a driving response.

[0036] The utility model discloses a memory alloy spring 20 is set on the top rod 30, and one end is with the abutment of spacing protrusion 33, the other end is with the abutment of the base of mounting seat 10.When the temperature of liquid increases, the elasticity of memory alloy spring 20 increases, thereby can drive mounting seat 10 drive the movement of the driven part 50 to the direction of spacing protrusion 33. Figure 2 And Figure 3 The utility model discloses a memory alloy spring 20 is set on the top rod 30, and one end is with the abutment of spacing protrusion 33, the other end is with the abutment of the base of mounting seat 10.When the temperature of liquid increases, the elasticity of memory alloy spring 20 increases, thereby can drive mounting seat 10 drive the movement of the driven part 50 to the direction of spacing protrusion 33.

[0037] Because the force value sensitivity of memory alloy spring 20 to water temperature can reach 0.1 DEG C, i.e. can make force value response to 0.1 DEG C temperature difference change.

[0038] Reset spring 40 is arranged on the side of mounting seat 10 away from memory alloy spring 20, and is configured to drive the movement of the driven part 50 to the direction of spacing protrusion 33.

[0039] Further, in parallel with the movement direction of the driven part 50, the length of reset spring 40 is greater than the length of memory alloy spring 20.

[0040] Further, the temperature-sensing driver 100 further comprises a second limiting member 62, which is arranged close to the second end 32 of the top rod 30. The second limiting member 62 abuts against one end of the reset spring 40 away from the driven member 50, so as to limit the movement of the reset spring 40, thereby driving the driven member 50 to move towards the limiting protrusion 33 when the elastic force of the reset spring 40 is greater than that of the memory alloy spring 20. Through the arrangement of the first limiting member 61 and the second limiting member 62, the reset spring 40 and the top rod 30 are both limited, and the driven member 50 in the middle has a tendency to move towards the first limiting member 61 due to the pushing force of the reset spring 40, and has a tendency to move towards the second limiting member 62 due to the connection with the temperature-sensing driver 100 when the memory alloy spring 20 is elongated. The two movement tendencies counteract and balance each other, and the elastic force of the memory alloy spring 20 changes with temperature, thereby breaking the balance and pushing the driven member 50 to slide left and right with the change of temperature.

[0041] In the present embodiment, one end of the reset spring 40 abuts against the second limiting member 62, and the other end abuts against the driven member 50. When the temperature decreases, the elastic force of the reset spring 40 is greater than that of the memory alloy spring 20, thereby driving the driven member 50 to move towards the limiting protrusion 33.

[0042] The driven member 50 is provided with a cooperating portion, a first extending wall 51 and a limiting wall 52. The cooperating portion is used to connect with the connecting portion 12, so as to realize the stable connection of the mounting seat 10 and the driven member 50 and the consistency of movement. The first extending wall 51 extends outward from the cooperating portion, one end of the reset spring 40 abuts against the second limiting member 62, and the other end abuts against the first extending wall 51. The arrangement of the first extending wall 51 provides a stable abutting surface for the reset spring 40, so that the elastic force of the reset spring 40 can be more directly and uniformly transmitted to the driven member 50. The optimization of the force transmission path reduces energy loss, improves the working efficiency of the driver, and ensures that the driven member 50 can quickly respond to the driving force of the reset spring 40 to realize accurate control. The limiting wall 52 is connected with the first extending wall 51 and surrounds the outer periphery of the cooperating portion, and cooperates with the cooperating portion and the first extending wall 51 to form an abutting groove for accommodating the reset spring 40. The abutting groove provides a stable mounting position for the reset spring 40, ensuring the reliable connection and force transmission between the reset spring 40 and the driven member 50, and providing protection for the linear movement of the reset spring 40.

[0043] In another optional embodiment, one end of the reset spring 40 abuts against the second limiting member 62, and the other end abuts against the mounting seat 10. That is, the reset spring 40 directly drives the mounting seat 10 to move, and drives the driven member 50 to move through the mounting seat 10.

[0044] Specifically, the mounting base 10 is provided with a second extension wall extending outward from the connecting portion 12, one end of the reset spring 40 abuts against the second limiting piece 62, and the other end abuts against the second extension wall. By arranging the second extension wall on the mounting base 10, the structure design on the to-be-driven member 50 can be omitted, and the application range of the temperature sensing driver 100 is improved.

[0045] Further, the memory alloy spring 20 has a compression state and a stretching state, the first distance between the limiting piece 34 and the limiting protrusion 33 is greater than or equal to the length of the memory alloy spring 20 in the stretching state. By reasonably arranging the distance between the limiting piece 34, the limiting protrusion 33 and the mounting base 10, it is ensured that the memory alloy spring 20 can normally work in the predetermined space in the stretching and compression states, and the function failure or damage caused by insufficient space is avoided, the reliability and stability of the whole device are improved, and the service life is prolonged.

[0046] Please refer to Figure 2 and Figure 3 It is shown that the movement process of the temperature sensing driver 100 of the utility model is:

[0047] When the temperature is low, the elastic force of the memory alloy spring 20 is smaller than the elastic force of the reset spring 40, the memory alloy spring 20 is compressed, and the reset spring 40 drives the to-be-driven member 50 to move towards the direction close to the limiting protrusion 33. When the temperature rises, the elastic force of the memory alloy spring 20 gradually increases and is greater than the elastic force of the reset spring 40, therefore, the memory alloy spring 20 can push the mounting base 10 and the to-be-driven member 50 to move away from the limiting protrusion 33 due to the first end 31 of the top rod 30 being limited. When the temperature decreases, the elastic force of the reset spring 40 increases, and the to-be-driven member 50 is driven to move towards the direction close to the limiting protrusion 33 again.

[0048] In summary, the temperature sensor driver 100 cancels the shell, through the mounting seat 10, the top rod 30 and the memory alloy spring 20 combination forms the new temperature sensor driver 100 structure, simple structure, lower cost.Through being provided with the limiting protrusion 33 on the top rod 30, mounting seat 10 is set between the second end 32 and the limiting protrusion 33, and memory alloy spring 20 is set between mounting seat 10 and the limiting protrusion 33, when memory alloy spring 20 senses that temperature rises, since the first end 31 of top rod 30 is fixedly limited, so memory alloy spring 20 can drive mounting seat 10 and the to-be-driven member 50 set on mounting seat 10 move to the direction away from the limiting protrusion 33, thereby can directly replace wax package, with high versatility and installation convenience, when upgrading or maintaining equipment, without needing to make complicated modification to original driving structure, just need to directly take down wax package, replace the temperature sensor driver 100 of the utility model, greatly reduce replacement cost and time cost, improve the efficiency of equipment maintenance and upgrading.In addition, the moving direction of the temperature sensor driver 100 of the utility model when temperature rises and reduces is consistent with the original wax package driving, so that when replacing equipment, without needing to re-commission or modify the mechanical components and control system connected thereto, ensure the compatibility and stability of equipment, reduce the system adaptation problem possibly caused by driving element replacement, ensure the normal operation and control precision of equipment.

[0049] By setting the limiting protrusion 33 on the top rod 30, the movement distance of the mounting seat 10 can be effectively limited to prevent excessive displacement during movement, thereby ensuring that the movement range of the mounting seat 10 is always controlled within the designed range. In addition, the limiting protrusion 33 can also provide stable support force for the memory alloy spring 20, ensuring that the spring can normally play its elastic role during work. By changing the distance between the limiting protrusion 33 and the second end 32 of the top rod 30, the initial position and movement range of the mounting seat 10 can be flexibly adjusted, thereby optimizing the working performance and adaptability of the temperature sensor driver 100. Specifically, adjusting the position of the limiting protrusion 33 can change the pre-tightening force and deformation amount of the memory alloy spring 20, affecting its response sensitivity and driving force to temperature changes. This design enables the temperature sensor driver 100 to achieve precise temperature control under different working conditions, meeting diverse application requirements.

[0050] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, it should be pointed out that, for ordinary skilled person in the prior art, on the premise of not departing from the technical principle of the utility model, can make several improvements and variations, these improvements and variations also should be regarded as the protection scope of the utility model.

Claims

1. A temperature sensing driver, characterized by, The utility model relates to a kind of driving device, including: Mounting seat, for connecting to be driven piece, and, the mounting seat has a through hole; Top rod, through the through hole, and with the mounting seat movable connection, the top rod includes oppositely arranged first end and second end, limit protrusion is arranged between the first end and the second end, the limit protrusion is close to the first end setting relative to the mounting seat; Memory alloy spring is arranged between the limit protrusion and the mounting seat, the memory alloy spring is configured to can drive the mounting seat to the direction away from the limit protrusion moves.

2. The temperature-sensitive driver of claim 1, wherein, The second end is equipped with limiting piece for limiting the mounting seat.

3. The temperature sensing driver of claim 1, wherein, Further including first limiting piece, the first end is abutted with the first limiting piece, and in the moving direction of the mounting seat is limited fixed by the first limiting piece.

4. The temperature sensing driver of claim 1, wherein, Further including second limiting piece and return spring, the second limiting piece is close to the second end setting, the return spring is arranged between the second limiting piece and the mounting seat, configured to drive the mounting seat to the direction close to the limit protrusion moves.

5. The temperature-sensitive driver of claim 4, wherein, Further including to be driven piece, the mounting seat is equipped with connecting portion, and the to-be-driven piece is equipped with cooperation portion connected with the connecting portion.

6. The temperature-sensitive driver of claim 5, wherein, The to-be-driven piece is equipped with first extension wall that extends from the cooperation portion outward, one end of the return spring is abutted with the second limiting piece, and the other end is abutted with the first extension wall.

7. The temperature-sensitive driver of claim 6, wherein, The first extension wall is further equipped with limiting wall connected with the first extension wall and surrounded in the outer periphery of the cooperation portion, the cooperation portion, the first extension wall and the limiting wall are collectively surrounded to form abutting groove for accommodating the return spring.

8. The temperature sensing driver of claim 6, wherein, The first extension wall is equipped with liquid flow hole for liquid to pass through.

9. The temperature sensing driver of claim 5, wherein, The mounting seat is equipped with second extension wall that extends from the connecting portion outward, one end of the return spring is abutted with the second limiting piece, and the other end is abutted with the second extension wall.

10. The temperature sensing driver of claim 2, wherein, The memory alloy spring has compression state and tensile state, the first distance between the limiting piece and the limit protrusion is greater than or equal to the length of the memory alloy spring in the tensile state with the difference between the thickness of the mounting seat.

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