Floating type temperature sensor

Abstract

The utility model relates to a floating type temperature sensor which comprises a temperature sensing probe, a guide support, a reset spring and a ground wire terminal piece, the ground wire terminal piece is electrically connected to the temperature sensing probe, and the guide support is provided with a guide channel which is in linear sliding fit with the temperature sensing probe. The temperature sensing probe is sleeved with the reset spring, the reset spring abuts against the position between the ground wire terminal piece and the guide support, the tail end of the ground wire terminal piece is provided with a connecting ring, the temperature sensing probe is tightly sleeved with the connecting ring, and the periphery, close to the temperature sensing probe, of the connecting ring is provided with an annular stamping area. The annular stamping area enables the inner ring wall of the connecting ring to be narrowed or form a bulge during stamping, and the connecting ring clamps the temperature sensing probe through narrowing or bulge; according to the temperature sensor, the ground wire terminal sheet is fixed on the temperature sensing probe through stamping transformation, so that the assembly efficiency can be improved, and the ground wire terminal sheet is firmer and more stable.

Description

Technical Field

[0001] This utility model relates to the field of temperature sensors, specifically a floating temperature sensor. Background Technology

[0002] Current temperature sensor structures, as shown in Chinese patent document, application number 202223295314.8, include a telescopic probe device comprising a metal shell, an elastic element, and a guide assembly. A terminal block is connected to the metal shell, with one end of the terminal block having a shell connection portion. The shell connection portion is a circular ring structure, preferably integrally connected to the outer wall of the metal shell using sheet metal processing methods such as riveting or welding. However, during the welding process, welding can easily damage the metal shell, and the welding process is difficult and time-consuming, affecting the production efficiency of the device. Furthermore, the high temperature generated during welding may affect or damage the temperature sensing unit of the metal shell. Therefore, further improvements are needed to the connection method of the existing terminal block. Utility Model Content

[0003] The purpose of this invention is to solve the aforementioned problems and provide a floating temperature sensor with a simple and reasonable structure.

[0004] A floating temperature sensor includes a temperature probe, a guide bracket, a return spring, and a ground terminal piece. The ground terminal piece is electrically connected to the temperature probe. The guide bracket has a guide channel that forms a linear sliding fit with the temperature probe. The return spring is sleeved on the outside of the temperature probe and abuts against the ground terminal piece and the guide bracket. The tail end of the ground terminal piece has a connecting ring that is tightly sleeved on the outside of the temperature probe. The connecting ring has a circumferential stamping area near the outer periphery of the temperature probe. During stamping, the circumferential stamping area causes the inner ring wall of the connecting ring to narrow or bulge, thereby clamping the temperature probe by narrowing or bulging.

[0005] The objective of this utility model can also be achieved by the following technical measures:

[0006] As a more specific embodiment, during the stamping process, the upper and lower end faces of the connecting ring form relatively recessed upper and lower indentations corresponding to the circumferential stamping area.

[0007] As a further embodiment, the guide bracket includes a base frame and a portal frame connected to the upper side of the base frame. The top plate of the portal frame has an upper guide hole, and the base frame has a lower guide hole that is coaxially opposite to the upper guide hole. The upper guide hole and the lower guide hole form a guide channel. The ground terminal piece and the reset spring are limited between the top plate and the base frame.

[0008] As a further embodiment, the portal frame is provided with side plates on both sides, and the connecting ring is slidably disposed between the two side plates. The connecting ring has two parallel straight edges on the adjacent side of the ground terminal piece, and the straight edges and the corresponding side plates form an anti-rotation limiting fit.

[0009] As a further embodiment, the bottom end of the side plate is bent outward to form a foot plate that rests flat against the base frame, and the foot plate has a rivet hole; the base frame has a flange hole corresponding to the rivet hole, the flange of the flange hole protrudes upward and extends into the rivet hole, and the portal bracket is riveted to the base frame by riveting the flange.

[0010] As a further embodiment, the base frame is provided with elongated connecting holes at both the left and right ends, and the elongated connecting holes are stretched along the length of the base frame.

[0011] As a further embodiment, the grounding terminal piece has a wiring hole at its front end; the grounding terminal piece is bent vertically downward relative to the connecting ring.

[0012] As a further embodiment, the temperature sensing probe includes a cylindrical metal shell, the top of which is closed and the bottom of which is open, and the connecting ring is clamped to the outside of the metal shell.

[0013] As a further embodiment, the temperature sensing probe also includes a thermocouple, which is fixed inside the metal casing by adhesive resin and close to the closed end of the metal casing, with two leads on the thermocouple leading out of the metal casing through the open end.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model discloses a floating temperature sensor. This temperature sensor fixes the ground terminal piece to the temperature probe by stamping and transformer, making the connection between the ground terminal piece and the temperature probe more secure and stable. It can improve assembly efficiency and solve the problems that are easy to damage the metal shell when the connection between the ground terminal piece and the temperature probe is welded, as well as the high temperature generated during welding can affect or damage the temperature sensing components inside the temperature probe. This greatly reduces the scrap rate of the temperature probe. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the temperature sensor structure in this utility model.

[0017] Figure 2 This is a schematic diagram showing the narrowing or protrusion of the circumferential stamping area before and after stamping in this utility model.

[0018] Figure 3 This is an exploded structural diagram of the temperature sensor of this utility model.

[0019] Figure 4 This is a schematic diagram of the anti-rotation fit between the connecting ring and the side plate of this utility model.

[0020] Figure 5 This is a schematic diagram of the base frame structure of this utility model. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] See Figure 1 and Figure 5 As shown, a floating temperature sensor includes a temperature probe 1, a guide bracket 2, a return spring 3, and a ground terminal 4. The ground terminal 4 is electrically connected to the temperature probe 1. The guide bracket 2 has a guide channel that forms a linear sliding fit with the temperature probe 1. The return spring 3 is sleeved on the outside of the temperature probe 1 and abuts against the ground terminal 4 and the guide bracket 2. The tail end of the ground terminal 4 has a connecting ring 5, which is tightly sleeved on the outside of the temperature probe 1. The connecting ring 5 has a circumferential stamping area M near the outer periphery of the temperature probe 1 (e.g., ...). Figure 2 As shown in Figure A1, the circumferential stamping zone M causes the inner ring wall 51 of the connecting ring 5 to narrow during stamping (as shown in Figure A1). Figure 2 (as shown in Figure A2) or forming a protrusion 511 (as shown in Figure A2) Figure 2 As shown in Figure A3, the connecting ring 5 clamps the temperature probe 1 by narrowing or protruding 511.

[0023] This temperature sensor uses a stamping and transformer to fix the ground terminal piece to the temperature probe, making the connection between the ground terminal piece and the temperature probe more secure and stable. This improves assembly efficiency and solves the problem that welding can easily damage the metal casing and the high temperature generated during welding can affect or damage the temperature sensing components inside the temperature probe, thus greatly reducing the scrap rate of the temperature probe.

[0024] During stamping, the upper and lower end faces of the connecting ring 5 form relatively recessed upper indentations 501 and lower indentations 502 corresponding to the circumferential stamping area; during assembly, the connecting ring 5 is pressed by the upper and lower pressure heads of the equipment (such as... Figure 2 (As shown by the mark N) After relative movement in the circumferential stamping zone M, and after the upper indentation 501 and the lower indentation 502 are pressed out respectively, the inner ring wall 51 of the connecting ring 5 will narrow.

[0025] The guide bracket 2 includes a base frame 6 and a portal bracket 7 connected to the upper side of the base frame 6. The top plate 71 of the portal bracket 7 has an upper guide hole 701, and the base frame 6 has a lower guide hole 601 that is coaxially opposite to the upper guide hole 701. The upper guide hole 701 and the lower guide hole 601 form a guide channel. The ground terminal piece 4 and the reset spring 3 are limited between the top plate 71 and the base frame 6.

[0026] This structure ensures that the temperature probe 1 slides linearly relative to the guide bracket 2 by cooperating with the upper guide hole 701 and the lower guide hole 601. It can also limit the reset spring 3 between the top plate 71 and the base frame 6, so that the temperature probe 1 can move elastically and better fit the surface of the heating element.

[0027] The portal frame 7 has side plates 72 on both sides. The connecting ring 5 is slidably disposed between the two side plates 72, and the connecting ring 5 has two parallel straight edges 503 on the adjacent side of the ground terminal piece 4. The straight edges 503 and the corresponding side plates 72 form an anti-rotation limiting fit. The ground terminal piece 4 extends outward from between the two side plates 72 and is limited and abutted against the side plates 72 by the two straight edges 503 (e.g., ...). Figure 4 As shown), ensure that the assembled temperature probe 1 does not rotate left or right when sliding up and down, thus preventing the ground terminal piece 4 from swaying left and right.

[0028] The bottom end of the side plate 72 is bent outward to form a foot plate 73 that rests flat against the base frame 6. The foot plate 73 has a riveting hole 731. The base frame 6 has a flanged hole 61 corresponding to the riveting hole 731. The flanged part 611 of the flanged hole 61 protrudes upward and extends into the riveting hole 731. By riveting the flanged part 611, the portal frame 7 is riveted to the base frame 6. The portal frame 7 is fixed to the base frame 6 by riveting. The stamping connection is simple to process and improves production efficiency. After riveting, the portal frame 7 will not become loose.

[0029] The base frame 6 has elongated connecting holes 62 at its left and right ends, which are extended along the length of the base frame 6. The floating temperature sensor is installed on the carrier using the elongated connecting holes 62. Moreover, after the screws are screwed in, the elongated connecting holes 62 have a certain amount of adjustment space, making the installation more flexible.

[0030] The ground terminal piece 4 has a wiring hole 401 at its front end; the ground terminal piece 4 is bent vertically downward relative to the connecting ring 5; bending the ground terminal piece 4 downward, compared to the existing straight extension to the outside, helps to protect the ground terminal piece 4 from being deformed by collision.

[0031] In this embodiment, the temperature sensing probe 1 includes a cylindrical metal shell 10, the top of the metal shell 10 is closed and the bottom is open, and the connecting ring 5 is clamped to the outside of the metal shell 10.

[0032] The temperature sensing probe 1 also includes a thermocouple 11, which is fixed inside the metal housing 10 by adhesive resin 12 and close to the closed end of the metal housing 10. Two leads 111 on the thermocouple 11 are led out of the metal housing 10 through the open end.

[0033] The metal casing 10 can transfer heat from the heating element, enabling the thermocouple 11 to sense the instantaneous temperature and reduce the error in temperature rise; the adhesive resin 12 can also be used to fix the thermocouple 11, and can also play a role in dust and water protection.

[0034] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A floating temperature sensor, comprising a temperature probe (1), a guide bracket (2), a reset spring (3), and a ground terminal piece (4), wherein the ground terminal piece (4) is electrically connected to the temperature probe (1), the guide bracket (2) has a guide channel that forms a linear sliding fit with the temperature probe (1), and the reset spring (3) is sleeved on the outside of the temperature probe (1) and abuts against the ground terminal piece (4) and the guide bracket (2), characterized in that: The end of the ground terminal piece (4) is provided with a connecting ring (5). The connecting ring (5) is tightly fitted on the outside of the temperature probe (1). The connecting ring (5) has a circumferential stamping area (M) near the outer periphery of the temperature probe (1). When the circumferential stamping area (M) is stamped, the inner ring wall (51) of the connecting ring (5) narrows or forms a protrusion (511). The connecting ring (5) clamps the temperature probe (1) by narrowing or protruding (511).

2. The floating temperature sensor according to claim 1, characterized in that: During stamping, the upper and lower end faces of the connecting ring (5) form relatively recessed upper indentation (501) and lower indentation (502) corresponding to the circumferential stamping area (M).

3. A floating temperature sensor according to claim 1, characterized in that: The guide bracket (2) includes a base frame (6) and a portal bracket (7) connected to the upper side of the base frame (6). The top plate (71) of the portal bracket (7) is provided with an upper guide hole (701), and the base frame (6) is provided with a lower guide hole (601) that is coaxial with and directly opposite the upper guide hole (701). The upper guide hole (701) and the lower guide hole (601) form a guide channel. The ground terminal piece (4) and the reset spring (3) are limited between the top plate (71) and the base frame (6).

4. A floating temperature sensor according to claim 3, characterized in that: The portal frame (7) is provided with side plates (72) on both sides. The connecting ring (5) is slidably disposed between the two side plates (72). The connecting ring (5) has two parallel straight edges (503) on the adjacent side of the ground terminal piece (4). The straight edges (503) and the corresponding side plates (72) form a rotation-stopping and limiting fit.

5. A floating temperature sensor according to claim 4, characterized in that: The bottom end of the side plate (72) is bent outward to form a foot plate (73) that rests flat against the base frame (6). The foot plate (73) has a rivet hole (731). The base frame (6) has a flange hole (61) corresponding to the rivet hole (731). The flange part (611) of the flange hole (61) protrudes upward and extends into the rivet hole (731). By riveting the flange part (611), the portal bracket (7) is riveted to the base frame (6).

6. A floating temperature sensor according to claim 3, characterized in that: The base frame (6) has elongated connecting holes (62) at its left and right ends respectively, and the elongated connecting holes (62) are stretched along the length of the base frame (6).

7. A floating temperature sensor according to claim 1, characterized in that: The ground terminal piece (4) has a wiring hole (401) at its front end; the ground terminal piece (4) is bent vertically downward relative to the connecting ring (5).

8. A floating temperature sensor according to claim 1, characterized in that: The temperature probe (1) includes a cylindrical metal shell (10), the top of which is closed and the bottom is open, and the connecting ring (5) is clamped outside the metal shell (10).

9. A floating temperature sensor according to claim 8, characterized in that: The temperature sensing probe (1) also includes a thermocouple (11). The thermocouple (11) is fixed inside the metal shell (10) by adhesive resin (12) and close to the closed end of the metal shell (10). Two leads (111) on the thermocouple (11) are led out of the metal shell (10) through the open end.

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