Die thermocouple fastening device

Abstract

The utility model discloses a mold thermocouple fastening device, which relates to the technical field of thermocouple assembly and comprises a shell, a clamping mechanism, an elastic pressing assembly and a locking structure. A mounting channel is arranged in the shell and is used for guiding directional mounting of the thermocouple probe; the clamping mechanism is located at the front end of the shell and comprises at least two clamping jaws capable of elastically deforming, and rapid positioning and preliminary fixing are achieved through meshing of limiting steps evenly distributed in the circumferential direction and a preformed hole of a mold. The elastic pressing assembly is arranged in the shell in a sliding mode, the tail end of the elastic pressing assembly is provided with an arc-shaped groove matched with the probe in shape, the rear end of the elastic pressing assembly provides continuous pressing force through a spiral spring, and gap changes caused by vibration or thermal deformation can be dynamically compensated. The locking structure penetrates through the side wall of the shell, rotation of the bolt is converted into axial locking force through matching of the conical head and the inclined face of the limiting groove of the pressing block, the vibration resistance and the contact stability are remarkably improved through the multi-stage synergistic effect, and temperature measurement signal drifting or probe falling is avoided.

Description

Technical Field

[0001] This utility model relates to the field of thermocouple assembly technology, specifically a mold thermocouple fastening device. Background Technology

[0002] In the process of mold manufacturing and use, thermocouples are key temperature monitoring elements, and their installation stability directly affects the accuracy of mold temperature control and production quality.

[0003] Currently, the industry commonly uses bolts to fasten thermocouples. However, during continuous operation, the mold is prone to high-frequency mechanical vibration, which causes the bolt preload to gradually decrease and the contact surface between the thermocouple and the mold to undergo micro-displacement, which in turn causes the temperature measurement signal to drift and may even cause it to fall off in severe cases. We propose a mold thermocouple fastening device. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by proposing a mold thermocouple fastening device.

[0005] In order to solve the above-mentioned technical problems, the present invention solves the problem that thermocouples in the prior art are prone to loosening due to vibration through the following technical solution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mold thermocouple fastening device includes: a housing with an installation channel inside; a snap-fit ​​mechanism disposed at the front end of the housing and having at least two elastically deformable claws; an elastic clamping assembly slidably disposed inside the housing; and a locking structure penetrating the side wall of the housing and being drively connected to the elastic clamping assembly.

[0008] Preferably, the locking mechanism includes an annular base, with claws evenly distributed circumferentially at the front end of the annular base, and a limiting step protruding inwardly fixed at the root of the claws.

[0009] Preferably, the elastic clamping assembly includes a pressure block coaxially arranged with the installation channel, and the end of the pressure block is provided with an arc-shaped groove that matches the shape of the thermocouple probe.

[0010] Preferably, the elastic clamping assembly further includes an elastic element disposed at the rear end of the pressure block. The elastic element is a helical spring, with its two ends abutting against the pressure block and the inner wall of the housing, respectively.

[0011] Preferably, the locking structure includes a locking bolt threaded to the side wall of the housing, the front end of the locking bolt having a tapered head that contacts the outer wall of the pressure block, and the outer wall of the pressure block having a corresponding limiting groove that mates with the tapered head.

[0012] Preferably, the inner wall of the housing is fixedly provided with a guide rib extending along the axial direction, and the outer wall of the pressure block is provided with a guide groove that slides with the guide rib.

[0013] Preferably, a terminal block is fixedly provided at the rear end of the housing, and a metal connecting piece for connecting to the thermocouple leads is embedded in the terminal block. The metal connecting piece is divided into multiple independent wiring areas by an insulating partition.

[0014] Preferably, the surface of the housing is provided with a heat dissipation structure, which includes heat dissipation fins distributed circumferentially and ventilation holes disposed at the ends of the housing.

[0015] Preferably, the surface of the heat dissipation fins is covered with an insulating coating.

[0016] Preferably, the bottom of the limiting step is provided with a guide slope to facilitate the insertion of the claw into the reserved hole of the mold.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model utilizes the elasticity of the helical spring to continuously apply clamping force through the cooperation of the elastic clamping component and the snap-fit ​​mechanism. Combined with the conical head and limiting groove structure of the locking bolt, it effectively offsets the impact caused by the high-frequency vibration of the mold, prevents the pre-tightening force from decaying, ensures the long-term stability of the contact surface between the thermocouple and the mold, and avoids the drift or detachment of the temperature measurement signal.

[0019] The end of the pressure block of the elastic clamping assembly is provided with an arc-shaped groove that matches the shape of the thermocouple probe. Combined with the sliding fit between the guide rib and the guide groove, it ensures centering during the clamping process, so that the thermocouple probe is subjected to uniform force, reduces micro-displacement caused by skew, and thus improves the accuracy and stability of temperature monitoring.

[0020] The guide and limiting protrusions and elastic deformation design on the inner side of the claw can quickly snap into the pre-drilled hole of the mold to achieve one-click installation, simplifying the operation process; at the same time, the heat dissipation fins, ventilation holes and insulating coating design on the surface of the housing effectively reduce the operating temperature of the device, avoid the risk of material aging or electrical short circuit in high temperature environment, extend service life and ensure safety. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the housing of this utility model;

[0024] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the claw structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the pressing block structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the locking bolt structure of this utility model.

[0028] Drawing number explanation: 1. Housing; 2. Snap-fit ​​mechanism; 3. Claw; 4. Elastic clamping assembly; 5. Locking structure; 6. Annular base; 7. Limiting step; 8. Pressure block; 9. Arc-shaped groove; 10. Elastic element; 11. Locking bolt; 12. Conical head; 13. Guide rib; 14. Fixing base; 15. Insulating partition; 16. Heat dissipation fins; 17. Ventilation hole; 18. Guide slope. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. Example

[0030] Please see Figures 1-6 A mold thermocouple fastening device includes: a housing 1 with an internal installation channel; a snap-fit ​​mechanism 2 located at the front end of the housing 1, having at least two elastically deformable claws 3; an elastic clamping assembly 4 slidably disposed inside the housing 1; and a locking structure 5 penetrating the side wall of the housing 1 and being drivenly connected to the elastic clamping assembly 4. The internal installation channel of the housing 1 provides directional guidance space for the arrangement of the thermocouple, ensuring the accuracy of its installation path. The snap-fit ​​mechanism 2 at the front end can quickly embed into the pre-reserved hole of the mold through the elastically deformable claws 3, achieving initial positioning and fixation; the elastic clamping assembly 4 slides within the housing 1, dynamically adjusting the clamping force to compensate for gap changes caused by thermal expansion and contraction or vibration of the mold; the locking structure 5 penetrates the side wall of the housing 1 and is drivenly connected to the elastic clamping assembly 4, converting the dynamic adjustment of the elastic clamping assembly 4 into a stable fastening force through a mechanical locking function, thereby forming a multi-level anti-loosening mechanism to comprehensively cope with high-frequency vibration environments.

[0031] The following describes some embodiments of this application in detail with reference to the accompanying drawings:

[0032] Please see Figures 1-6 This utility model utilizes the elasticity of the helical spring to continuously apply clamping force through the cooperation of the elastic clamping component 4 and the snap-fit ​​mechanism 2. Combined with the conical head 12 of the locking bolt 11 and the limiting groove structure, it effectively offsets the impact caused by the high-frequency vibration of the mold, prevents the pre-tightening force from decaying, ensures the long-term stability of the contact surface between the thermocouple and the mold, and avoids the drift or detachment of the temperature measurement signal.

[0033] The locking mechanism 2 includes an annular base 6, with claws 3 evenly distributed circumferentially at the front end of the annular base 6. A limiting step 7 protruding inwards is fixed at the root of each claw 3. The annular base 6 serves as the supporting foundation for the claws 3, and its structural strength ensures the overall stability of the locking mechanism 2. The limiting step 7 at the root of the claw 3 protrudes inwards, and when it is engaged with the pre-drilled hole in the mold, the limiting step 7 forms a mechanical engagement with the hole wall, preventing excessive deformation or accidental disengagement of the claws 3. Simultaneously, the circumferentially distributed claws 3 apply force evenly, ensuring the symmetrical pressure distribution on the contact surface between the thermocouple and the mold, avoiding deformation or loosening caused by localized stress concentration.

[0034] Furthermore, the elastic clamping assembly 4 includes a clamping block 8 coaxially arranged with the mounting channel. The end of the clamping block 8 has an arc-shaped groove 9 that matches the shape of the thermocouple probe. This groove not only adapts to the probe's geometry but also increases the effective contact area through curved surface contact, reducing pressure per unit area and preventing damage to the probe surface due to pressure concentration. In addition, the guiding effect of the arc-shaped groove 9 guides the probe to precise centering, and in conjunction with the axial sliding of the clamping block 8, achieves self-adaptive clamping, ensuring a tight fit between the thermocouple probe and the mold contact surface, and improving the stability of the temperature measurement signal.

[0035] Furthermore, the elastic clamping assembly 4 also includes an elastic element 10 disposed at the rear end of the pressure block 8. The elastic element 10 is a helical spring, with its two ends abutting against the pressure block 8 and the inner wall of the housing 1, respectively. The elastic characteristics of the helical spring can continuously provide dynamic clamping force. When the mold vibrates or the temperature changes, the gap is automatically compensated by the extension and contraction of the spring to maintain a constant contact pressure. At the same time, the axial compression characteristics of the spring work in conjunction with the locking structure 5, which allows for elastic clearance during quick installation and forms rigid support after locking, thus balancing flexibility and reliability.

[0036] Meanwhile, the locking structure 5 includes a locking bolt 11 threaded to the side wall of the housing 1. The front end of the locking bolt 11 is provided with a conical head 12 that contacts the outer wall of the pressure block 8. The outer wall of the pressure block 8 is provided with a corresponding limiting groove that mates with the conical head 12. When the locking bolt 11 is rotated, the conical head 12 advances along the limiting groove, converting the rotational movement of the bolt into the axial displacement of the pressure block 8, thereby locking the position of the pressure block 8. The inclined surface contact design between the conical head 12 and the limiting groove can generate a large axial locking force under small torque, which reduces the operating intensity and avoids structural damage caused by overtightening.

[0037] Meanwhile, the inner wall of the housing 1 is fixed with an axially extending guide rib 13, and the outer wall of the pressure block 8 is provided with a guide groove that slides with the guide rib 13. The matching design of the guide rib 13 and the groove effectively limits the radial displacement of the pressure block 8, ensuring that the direction of the clamping force is always consistent with the thermocouple axis, and avoiding probe tilting or poor contact due to eccentricity. In addition, this guide structure can also reduce sliding friction and extend the service life of the component.

[0038] It is worth noting that the surface of the housing 1 is provided with a heat dissipation structure, which includes heat dissipation fins 16 distributed circumferentially and ventilation holes 17 located at the ends of the housing 1. The heat dissipation fins 16 accelerate heat dissipation by increasing the surface area, while the ventilation holes 17 form convection channels to promote airflow and enhance heat dissipation efficiency. This design effectively reduces the internal temperature of the device and prevents thermocouples and electronic components from performance degradation or damage due to overheating, making it particularly suitable for mold environments with high-load continuous operation.

[0039] Furthermore, the surface of the heat dissipation fins 16 is covered with an insulating coating. The high thermal conductivity of the coating ensures that the heat dissipation efficiency is not affected, while its insulating properties prevent leakage or short circuit caused by accidental contact with live parts on the surface of the housing 1, further improving the safety and environmental adaptability of the device.

[0040] In this technical solution, a terminal block mounting base 14 is fixedly provided at the rear end of the housing 1. The mounting base 14 is embedded with a metal connecting piece that connects to the thermocouple lead. The metal connecting piece is divided into multiple independent wiring areas by an insulating partition 15 to achieve electrical isolation between different leads and prevent short circuit risk.

[0041] In this technical solution, the bottom of the limiting step 7 is provided with a guide slope 18, which makes it convenient for the claw 3 to be inserted into the reserved hole of the mold.

[0042] The operating principle of the device is explained below:

[0043] First, check the size and position of the reserved hole on the mold to ensure that it matches the clamp 3 of the device. According to the size of the thermocouple probe and the mold requirements, select a suitable fastening device to ensure that the arc groove 9 of the pressure block 8 matches the shape of the probe.

[0044] The thermocouple leads are connected to the terminal block 14 at the rear of the housing 1. The metal connecting piece is separated into independent wiring areas by an insulating partition 15 to avoid the risk of short circuit. Then, the thermocouple probe, along with the device, is placed in the mounting position on the mold. With the thermocouple probe inside the device, the front end of the device's claw 3 is aligned with the pre-drilled hole in the mold. The limiting protrusion with a guide slope 18 on the inner side of the claw 3 guides the claw 3 to gradually embed into the hole. Under the action of elastic deformation, the claw 3 retracts inward until the limiting step 7 forms a mechanical engagement with the hole wall, completing the initial fixation. At this time, the claw 3 is evenly distributed circumferentially to ensure symmetrical force and avoid skewing.

[0045] During this process, as the device is continuously pressed down, the pressure block 8 presses against the thermocouple probe. The pressure block 8 slides backward under the reaction force, compressing the helical spring at the rear end. The elastic force of the spring is evenly transmitted to the probe surface through the pressure block 8, and the curved surface contact of the arc-shaped groove 9 increases the effective contact area, avoiding pressure concentration.

[0046] Using a tool, rotate the locking bolt 11 clockwise. The tapered head 12 at its front end advances along the limiting groove of the pressure block 8, converting the rotational motion of the bolt into the axial displacement of the pressure block 8. The inclined surface design of the tapered head 12 generates a large axial force under small torque, enhancing the clamping force on the probe. At the same time, the guide rib 13 and the guide groove ensure the linear movement of the pressure block 8 and prevent skewing. When the bolt is turned to the preset torque, the position of the pressure block 8 is completely locked, forming a dual anti-loosening mechanism of "elastic clamping + rigid locking".

[0047] When the device is running, the heat dissipation fins 16 of the housing 1 accelerate heat dissipation by increasing the surface area, and the end ventilation holes 17 promote air convection.

[0048] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A mold thermocouple fastening device, characterized in that, include: The housing (1) has an internal installation channel; The snap-fit ​​mechanism (2) is located at the front end of the housing (1) and has at least two elastically deformable claws (3). The elastic clamping assembly (4) is slidably disposed inside the housing (1); The locking structure (5) penetrates the side wall of the housing (1) and is connected to the elastic clamping assembly (4) in a driving manner.

2. The mold thermocouple fastening device according to claim 1, characterized in that: The snap-fit ​​mechanism (2) includes an annular base (6), and the snap claws (3) are evenly distributed around the front end of the annular base (6). The root of the snap claws (3) is fixed with a limiting step (7) that protrudes inward.

3. The mold thermocouple fastening device according to claim 2, characterized in that: The elastic clamping assembly (4) includes a pressure block (8) coaxially arranged with the installation channel, and the end of the pressure block (8) is provided with an arc-shaped groove (9) that matches the shape of the thermocouple probe.

4. The mold thermocouple fastening device according to claim 3, characterized in that: The elastic pressing assembly (4) also includes an elastic element (10) disposed at the rear end of the pressing block (8). The elastic element (10) is a helical spring, and its two ends abut against the pressing block (8) and the inner wall of the housing (1), respectively.

5. A mold thermocouple fastening device according to claim 4, characterized in that: The locking structure (5) includes a locking bolt (11) threaded to the side wall of the housing (1). The front end of the locking bolt (11) is provided with a conical head (12) that contacts the outer wall of the pressure block (8). The outer wall of the pressure block (8) is provided with a limiting groove that cooperates with the conical head (12).

6. A mold thermocouple fastening device according to claim 3, characterized in that: The inner wall of the housing (1) is fixedly provided with a guide rib (13) extending along the axial direction, and the outer wall of the pressure block (8) is provided with a guide groove that slides with the guide rib (13).

7. The mold thermocouple fastening device according to claim 1, characterized in that: The housing (1) is fixedly provided with a terminal block (14) at the rear end. The terminal block (14) is embedded with a metal connecting piece that is connected to the thermocouple lead. The metal connecting piece is divided into multiple independent wiring areas by an insulating partition (15).

8. A mold thermocouple fastening device according to claim 1, characterized in that: The surface of the housing (1) is provided with a heat dissipation structure, which includes heat dissipation fins (16) distributed along the circumferential direction and ventilation holes (17) provided at the end of the housing (1).

9. A mold thermocouple fastening device according to claim 8, characterized in that: The surface of the heat dissipation fins (16) is covered with an insulating coating.

10. A mold thermocouple fastening device according to claim 2, characterized in that: The bottom of the limiting step (7) is provided with a guide slope (18) to facilitate the insertion of the claw (3) into the reserved hole of the mold.

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