Hot deformation, vicat softening point tester with upturned door structure

Abstract

The utility model provides a kind of hot deformation, vicat softening point temperature determinator is with upper door structure, including connecting shaft, upper door mechanism, upper door and clutch driving mechanism, clutch driving mechanism has the clutch portion that can be connected or separated with connecting shaft, clutch driving mechanism is used to form the automatic mode of automatic driving connecting shaft rotation when clutch portion and connecting shaft are connected;When clutch portion and connecting shaft are separated, make connecting shaft lose power connection and form manual mode.The utility model provides hot deformation, vicat softening point temperature determinator is with upper door structure, and the open function of upper door is realized, compared with traditional side open type protective door, the space of experimental operation mouth both sides is saved, personnel pass through, improve space utilization;Through clutch driving mechanism automatic driving connecting shaft rotation, the automatic opening and closing of upper door are realized;When emergency is encountered, clutch portion can be separated from power end, switch to manual mode, manually open upper door.

Description

Technical Field

[0001] This utility model belongs to the field of testing instrument technology, specifically relating to an upward-opening door structure for a thermal deformation and Vicat softening point temperature measuring instrument. Background Technology

[0002] A heat distortion and Vicat softening point temperature (WDT) tester is a specialized instrument used to test the deformation capacity of polymer materials under specific temperatures and loads. Its core function is to evaluate the heat resistance of materials. The testing process can be summarized in three steps: "environmental simulation - load application - deformation measurement." Specifically, this includes sample pretreatment, simulating the usage environment, and recording key data. Sample pretreatment involves processing polymer materials such as plastics and rubber into standard-sized samples to ensure consistent testing conditions. Simulating the usage environment involves placing the sample in a heating medium (such as silicone oil or an air bath), gradually increasing the temperature at a set rate, and simultaneously applying a fixed static load. Recording key data involves real-time monitoring of sample deformation using a displacement sensor; when the deformation reaches a preset value, the temperature at that moment is recorded, and this temperature is the material's heat distortion temperature.

[0003] In existing technologies, during the use of heat distortion and Vicat softening point temperature measuring instruments, the instrument frame typically has a hollow experimental chamber and an experimental operation port connected to the chamber. The operation port is usually protected by a protective door. This protective door, as a core component ensuring experimental safety, serves to isolate high-temperature areas, prevent burns to operators, and protect high-precision displacement measuring instruments. However, existing protective doors only support manual or automatic operation in a single mode. Manual doors require manual operation, and accidental activation during the experiment may lead to safety risks, such as the door automatically opening due to vibration or misoperation, exposing the high-temperature hazard to the personnel. While automatic doors can be electrically driven, they cannot be manually opened in case of power failure or malfunction, posing an emergency operation hazard. Furthermore, protective doors are usually side-opening, which, when open, affects the space on both sides of the protective door, hindering personnel passage and resulting in poor adaptability and practicality. Utility Model Content

[0004] This utility model provides an upward-opening door structure for a heat deformation and Vicat softening point temperature measuring instrument, which aims to solve the problems of poor adaptability and practicality of existing protective door structures.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an upward-opening door structure for a heat deformation and Vicat softening point temperature measuring instrument, comprising: A connecting shaft is horizontally positioned and rotatably mounted at the experimental operation port on the measuring instrument frame, with both ends of the connecting shaft extending out of the experimental operation port; one end of the connecting shaft is designated as the power end. The upward flipping mechanism is provided in two parts, which are spaced apart along the axis of the connecting shaft. One end of each upward flipping mechanism is fixedly connected to the connecting shaft, and the other end of each upward flipping mechanism extends outward in a direction perpendicular to the axis of the connecting shaft. The flip-up door connects the extended ends of the two flip-up mechanisms; the flip-up door has a closed state covering the experimental operation opening and an open state detached from the experimental operation opening and located above the experimental operation opening. A clutch drive mechanism is mounted on the measuring instrument frame and has a clutch part that can be connected to or separated from the power end. The clutch drive mechanism is used to form an automatic mode that automatically drives the connecting shaft to rotate when the clutch part is connected to the power end; and to form a manual mode when the clutch part is separated from the power end, causing the connecting shaft to lose power connection.

[0006] In one possible implementation, the direction of the interval between the two upward-flipping mechanisms is defined as the first direction, and the direction that is perpendicular to and horizontal to the first direction is defined as the second direction; Each of the aforementioned upward-flipping mechanisms includes: A frame connecting seat is fixed on the measuring instrument frame, and the frame connecting seat is provided with a connecting hole for the connecting shaft to pass through; The L-shaped drive arm has a first short cantilever and a first long cantilever. When the flip-up door is in the unfolded state, the first short cantilever is arranged along the second direction. One end of the first short cantilever is fixed on the connecting shaft, and the other end of the first short cantilever extends outward toward the measuring instrument frame. The first long cantilever is arranged in the vertical direction. The bottom end of the first long cantilever is integrally connected to the extended end of the first short cantilever, and the top end of the first long cantilever extends upward in the vertical direction. An L-shaped auxiliary arm is spaced apart from the L-shaped drive arm along the first direction. The L-shaped auxiliary arm has a second short cantilever and a second long cantilever. When the flip-up door is in the unfolded state, the second short cantilever is arranged along the second direction and spaced apart from the first short cantilever along the vertical direction. One end of the second short cantilever is rotatably mounted on the frame connecting seat, and the rotation axis is arranged along the first direction. The other end of the second short cantilever extends outward toward the measuring instrument frame. The second long cantilever is arranged along the vertical direction. The bottom end of the second long cantilever is integrally connected to the extended end of the second short cantilever. The top end of the second long cantilever extends upward along the vertical direction. The middle connecting plate is vertically arranged when the flip-up door is in the unfolded state. The top end of the middle connecting plate is hinged to the middle section of the first long cantilever, and the bottom end of the middle connecting plate is hinged to the middle section of the second long cantilever. The door connector is hinged at the top to the top of the first long cantilever when the flip-up door is in the unfolded state, and hinged at the bottom to the top of the second long cantilever. The door connector is fixedly connected to the flip-up door.

[0007] In one possible implementation, a connecting rod arranged along the first direction is connected between the two L-shaped drive arms, and the two ends of the connecting rod are respectively connected to the sidewalls of the two first short cantilever arms.

[0008] In one possible implementation, the upward-opening door includes: The door frame is fixedly connected to both of the door connecting seats, and the door frame has a through opening extending along the second direction; An observation window is fixedly installed at the opening of the door frame. The door handle is installed on the door frame and is integrally connected to the door frame.

[0009] In one possible implementation, the direction of the interval between the two upward-flipping mechanisms is defined as the first direction, and the direction that is perpendicular to and horizontal to the first direction is defined as the second direction; The clutch drive mechanism includes: A drive structure is fixed on the measuring instrument frame. The drive structure has a drive sleeve, which is rotatably mounted on the measuring instrument frame. The drive sleeve is sleeved on the connecting shaft and close to the power end. The drive sleeve is spaced apart from the connecting shaft. A female insertion end is provided on the end of the drive sleeve close to the power end. A clutch structure is provided at the power end of the connecting shaft. The clutch structure rotates with the connecting shaft. The clutch structure has a clutch part that can be connected to or separated from the drive sleeve. The clutch part is used to control the connection and separation of the drive sleeve from the connecting shaft.

[0010] In one possible implementation, the clutch structure includes: A clutch cap has a clutch cylinder cavity with one open end. The clutch cap is coaxially sleeved on the power end of the connecting shaft and slidably disposed on the connecting shaft along the first direction. The open end of the clutch cap is provided with a plug-in male end that is adapted to the plug-in female end. The side wall of the clutch cap is provided with an opening. The clutch cap is the clutch part. A connecting end cap is coaxially mounted on the power end of the connecting shaft; A spring is sleeved on the connecting shaft, with the clutch cap and the connecting end cap connected to the two ends of the spring respectively. The spring is used to make the clutch cap tend to move toward the drive sleeve at all times. A clutch screw is coaxially arranged with the clutch cap. One end of the clutch screw abuts against the connecting end cover, and the other end of the clutch screw passes through the other end of the clutch cap and extends outward. The clutch screw is threadedly connected to the clutch cap, and the clutch screw is used to make the clutch cap slide by rotation. The connecting shaft is provided with a groove for the clutch cap to slide.

[0011] In one possible implementation, an auxiliary handle is provided on the extended end of the clutch screw.

[0012] In one possible implementation, the upward-opening door structure of the thermal deformation and Vicat softening point temperature measuring instrument further includes a position sensing mechanism, which comprises: A first cam is fixed on the connecting shaft, and the axis of the first cam is collinear with the axis of the connecting shaft. The second cam is fixed on the connecting shaft, and the axis of the second cam is collinear with the axis of the connecting shaft. The second cam is installed at a different angle from the first cam. The first pressure sensor is fixed on the frame of the measuring instrument, and the pressure sensing end of the first pressure sensor is always in contact with the cam wall of the first cam. The second pressure sensor is fixed on the frame of the measuring instrument, and the pressure sensing end of the second pressure sensor is always in contact with the cam wall of the second cam. A matching controller is electrically connected to the first pressure sensor, the second pressure sensor, and the drive structure.

[0013] In one possible implementation, bearings are provided at the rotatable connection between the connecting shaft and the measuring instrument frame.

[0014] Compared with existing technologies, this implementation achieves the function of opening the flip-up door by means of a connecting shaft, a flip-up mechanism, a flip-up door, and a clutch drive mechanism. Compared with traditional side-opening protective doors, it greatly saves the space on both sides of the experimental operation opening, facilitates free passage of staff in the laboratory, and improves space utilization. The clutch drive mechanism automatically drives the connecting shaft to rotate, realizing the automatic opening and closing of the flip-up door, which is convenient and efficient. In case of emergency such as power failure or equipment failure, the clutch can be separated from the power end to switch to manual mode and manually open the flip-up door, effectively avoiding the risk that the automatic door cannot be opened in special circumstances. It has good adaptability and practicality. Attached Figure Description

[0015] Figure 1 A schematic diagram of the upward-opening door structure for the heat deformation and Vicat softening point temperature measuring instrument provided in this embodiment of the utility model; Figure 2Schematic diagram of the installation structure of the upward-opening door structure for the heat deformation and Vicat softening point temperature measuring instrument provided in this embodiment of the utility model. Figure 1 ; Figure 3 A front view schematic diagram of the clutch drive mechanism and connecting shaft of the upward-opening door structure for the thermal deformation and Vicat softening point temperature measuring instrument provided in the embodiment of this utility model; Figure 4 A schematic diagram of the upper-opening door structure and clutch structure for the heat deformation and Vicat softening point temperature measuring instrument provided in this embodiment of the utility model. Figure 1 ; Figure 5 A schematic diagram of the upper-opening door structure and clutch structure for the heat deformation and Vicat softening point temperature measuring instrument provided in this embodiment of the utility model. Figure 2 ; Figure 6 Schematic diagram of the installation structure of the upward-opening door structure for the heat deformation and Vicat softening point temperature measuring instrument provided in this embodiment of the utility model. Figure 2 ; Figure 7 for Figure 6 Enlarged structural diagram at point A; Explanation of reference numerals in the attached figures: 10. Connecting shaft; 20. Flip-up mechanism; 21. Frame connecting seat; 22. L-shaped drive arm; 23. L-shaped auxiliary arm; 24. Intermediate connecting plate; 25. Door connecting seat; 26. Connecting rod; 30. Flip-up door; 31. Door frame; 32. Observation window; 33. Door handle; 40. Clutch drive mechanism; 41. Drive structure; 411. Drive sleeve; 42. Clutch structure; 421. Clutch cap; 422. Connecting end cover; 423. Spring; 424. Clutch screw; 4241. Auxiliary handle; 50. Position sensing mechanism; 51. First cam; 52. Second cam; 53. First pressure sensor; 54. Second pressure sensor; 60. Measuring instrument frame. Detailed Implementation

[0016] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0020] Please refer to the following: Figures 1 to 7The structure of the flip-up door 30 for the heat distortion and Vicat softening point temperature measuring instrument provided by this utility model will now be described. The flip-up door 30 structure for the heat distortion and Vicat softening point temperature measuring instrument includes a connecting shaft 10, a flip-up mechanism 20, a flip-up door 30, and a clutch drive mechanism 40. The connecting shaft 10 is horizontally positioned and rotatably mounted at the experimental operation port on the measuring instrument frame 60, with both ends of the connecting shaft 10 extending out of the experimental operation port. One end of the connecting shaft 10 is designated as the power end. Two flip-up mechanisms 20 are provided, spaced apart along the axial direction of the connecting shaft 10. One end of each flip-up mechanism 20 is fixedly connected to the connecting shaft 10, and the other end of each flip-up mechanism 20 extends outward in a direction perpendicular to the axial direction of the connecting shaft 10. The flip-up door 30 connects the extended ends of the two flip-up mechanisms 20. The flip-up door 30 has a closed state covering the experimental operation port and an open state detached from the experimental operation port and located above it. The clutch drive mechanism 40 is mounted on the measuring instrument frame 60 and has a clutch part that can be connected to or disconnected from the power end. When the clutch part is connected to the power end, the clutch drive mechanism 40 is used to form an automatic mode that automatically drives the connecting shaft 10 to rotate. When the clutch part is disconnected from the power end, the connecting shaft 10 loses power connection and enters a manual mode.

[0021] The upward-opening door 30 structure for the heat distortion and Vicat softening point temperature measuring instrument provided in this embodiment, compared with the prior art, achieves the upward-opening function of the upward-opening door 30 through the connecting shaft 10, the upward-opening mechanism 20, the upward-opening door 30, and the clutch drive mechanism 40. Compared with the traditional side-opening protective door, it greatly saves the space on both sides of the experimental operation opening, facilitates the free passage of staff in the laboratory, and improves space utilization. The clutch drive mechanism 40 automatically drives the connecting shaft 10 to rotate, realizing the automatic opening and closing of the upward-opening door 30, which is convenient and efficient to operate. In case of emergency such as power failure or equipment failure, the clutch can be separated from the power end, switching to manual mode to manually open the upward-opening door 30, effectively avoiding the risk that the automatic door cannot be opened in special circumstances, with good adaptability and practicality.

[0022] In some embodiments, the aforementioned upward-flipping mechanism 20 may employ, for example... Figure 1 , Figure 2 , Figure 6 The structure shown. See also Figure 1 , Figure 2 , Figure 6 The direction of the interval between the two upward flipping mechanisms 20 is defined as the first direction, and the direction that is perpendicular to and horizontal to the first direction is defined as the second direction.

[0023] Each flip-up mechanism 20 includes a frame connecting seat 21, an L-shaped drive arm 22, an L-shaped auxiliary arm 23, an intermediate connecting plate 24, and a door connecting seat 25. The frame connecting seat 21 is fixed on the measuring instrument frame 60, and the frame connecting seat 21 is provided with a connecting hole for the connecting shaft 10 to pass through. The L-shaped drive arm 22 has a first short cantilever and a first long cantilever. When the flip-up door 30 is in the unfolded state, the first short cantilever is arranged along the second direction, one end of the first short cantilever is fixed on the connecting shaft 10, and the other end of the first short cantilever extends outward toward the measuring instrument frame 60. The first long cantilever is arranged in the vertical direction, the bottom end of the first long cantilever is integrally connected to the extended end of the first short cantilever, and the top end of the first long cantilever extends upward in the vertical direction. L-shaped auxiliary arm 23 and L-shaped drive arm 22 are spaced apart along a first direction. L-shaped auxiliary arm 23 has a second short cantilever and a second long cantilever. When the flip-up door 30 is in the unfolded state, the second short cantilever is arranged along a second direction and spaced apart from the first short cantilever along a vertical direction. One end of the second short cantilever is rotatably mounted on the frame connecting seat 21, with the rotation axis arranged along the first direction. The other end of the second short cantilever extends outward toward the measuring instrument frame 60. The second long cantilever is arranged vertically, with its bottom end integrally connected to the extended end of the second short cantilever, and its top end extending upward vertically. When the flip-up door 30 is in the unfolded state, the intermediate connecting plate 24 is vertically arranged, with its top end hinged to the middle section of the first long cantilever and its bottom end hinged to the middle section of the second long cantilever. When the lift-up door 30 is in the unfolded state, the top of the door connector 25 is hinged to the top of the first long cantilever, the bottom of the door connector 25 is hinged to the top of the second long cantilever, and the door connector 25 is fixedly connected to the lift-up door 30.

[0024] The structural design of the L-shaped drive arm 22, L-shaped auxiliary arm 23, intermediate connecting plate 24, and door connecting seat 25, through the hinges and connections between the various components, enables the upward-opening door 30 to achieve stable movement during opening and closing. The L-shaped drive arm 22 rotates under the drive of the connecting shaft 10, and through the transmission of the intermediate connecting plate 24, the L-shaped auxiliary arm 23 moves in coordination, jointly supporting and guiding the movement trajectory of the upward-opening door 30. This ensures that the upward-opening door 30 can rise and fall smoothly, avoiding swaying. This stable movement structure not only improves the service life of the upward-opening door 30 but also further enhances operational safety.

[0025] In some embodiments, the L-shaped drive arm 22 described above can be adopted as follows: Figure 1 , Figure 2 , Figure 6 The structure shown. See also Figure 1 , Figure 2 , Figure 6A connecting rod 26 arranged along the first direction is connected between the two L-shaped drive arms 22, and the two ends of the connecting rod 26 are respectively connected to the side walls of the two first short cantilever arms.

[0026] The connecting rod 26 reinforces the two L-shaped drive arms 22, enhancing the structural stability of the entire tilting mechanism 20. During operation, the tilting door 30 is subjected to various external forces, such as impacts during opening and closing, and vibrations during experiments. The connecting rod 26 effectively disperses these forces, preventing deformation or damage to the L-shaped drive arms 22 due to uneven stress, thus ensuring the reliability and durability of the tilting door 30 structure. Given the large size and weight of the tilting door 30, it bears correspondingly greater external forces. The reinforcing effect of the connecting rod 26 ensures the stability of the tilting door 30 structure during long-term operation, reducing equipment failures and maintenance frequency, and improving production efficiency.

[0027] In some embodiments, the aforementioned upward-opening door 30 may adopt the following... Figure 1 , Figure 2 , Figure 6 The structure shown. See also Figure 1 , Figure 2 , Figure 6 The lift-up door 30 includes a door frame 31, an observation window 32, and a door handle 33. The door frame 31 is fixedly connected to both door connecting seats 25, and the door frame 31 has a through opening extending in a second direction. The observation window 32 is fixedly installed at the opening of the door frame 31. The door handle 33 is installed on the door frame 31 and is integrally connected to the door frame 31.

[0028] The door frame 31 provides a robust framework for the upward-opening door 30, ensuring the overall strength and stability of the door. The observation window 32 allows operators to observe the experimental conditions inside the chamber, such as sample deformation and temperature changes, without opening the upward-opening door 30, thus avoiding interference with the experimental environment from frequent door opening. The door handle 33 is the main operating component in manual mode, allowing operators to control the upward-opening door 30 more conveniently, enhancing operational ease. The observation window 32 allows staff to easily monitor the experiment without affecting the experimental process, improving research efficiency.

[0029] In some embodiments, the clutch drive mechanism 40 described above may employ, for example... Figures 1 to 7 The structure shown. See also Figures 1 to 7 The direction of the interval between the two upward flipping mechanisms 20 is defined as the first direction, and the direction that is perpendicular to and horizontal to the first direction is defined as the second direction.

[0030] The clutch drive mechanism 40 includes a drive structure 41 and a clutch structure 42. The drive structure 41 is fixed to the measuring instrument frame 60 and has a drive sleeve 411 rotatably mounted on the measuring instrument frame 60. The drive sleeve 411 is sleeved on the connecting shaft 10 and close to the power end, with a spaced distance between the drive sleeve 411 and the connecting shaft 10. A female connector is provided at the end of the drive sleeve 411 closest to the power end. The clutch structure 42 is located at the power end of the connecting shaft 10 and rotates with the connecting shaft 10. The clutch structure 42 has a clutch portion that can be connected to or separated from the drive sleeve 411, used to control the connection and separation of the drive sleeve 411 from the connecting shaft 10.

[0031] The design of the drive structure 41 and clutch structure 42, through the clutch part controlling the connection and separation of the drive sleeve 411 and the connecting shaft 10, realizes convenient switching between automatic and manual modes. In automatic mode, the drive structure 41 drives the connecting shaft 10 to rotate through the drive sleeve 411, realizing the automatic opening and closing of the top-hinged door 30, which is suitable for normal experimental operation procedures and improves the convenience and efficiency of operation. In case of special circumstances, such as power failure or equipment failure, the operator can operate the clutch structure 42 to separate the clutch part from the drive sleeve 411, disconnect the power connection, and switch to manual mode to manually open or close the top-hinged door 30, ensuring timely operation in emergency situations and protecting experimental and personnel safety. This flexible mode switching design adapts to different usage scenarios and emergencies, improving the applicability and safety of the heat deformation and Vicat softening point temperature measuring instrument.

[0032] In some embodiments, the clutch structure 42 described above can be as follows: Figures 3 to 5 The structure shown. See also Figures 3 to 5 The clutch structure 42 includes a clutch cap 421, a connecting end cover 422, a spring 423, and a clutch screw 424. The clutch cap 421 has a clutch cavity with one open end. The clutch cap 421 is coaxially sleeved on the power end of the connecting shaft 10 and slidably disposed on the connecting shaft 10 along a first direction. The open end of the clutch cap 421 has a plug-in male end adapted to the plug-in female end. An opening is provided on the side wall of the clutch cap 421, which serves as the clutch part. The connecting end cover 422 is coaxially disposed on the power end of the connecting shaft 10. The spring 423 is sleeved on the connecting shaft 10, with its two ends connected to the clutch cap 421 and the connecting end cover 422, respectively. The spring 423 is used to ensure that the clutch cap 421 always tends to move towards the drive sleeve 411. The clutch screw 424 and the clutch cap 421 are coaxially arranged. One end of the clutch screw 424 abuts against the connecting end cover 422, and the other end of the clutch screw 424 passes through the other end of the clutch cap 421 and extends outward. The clutch screw 424 and the clutch cap 421 are threadedly connected. The clutch screw 424 is used to make the clutch cap 421 slide by rotation.

[0033] The connecting shaft 10 is provided with a groove for the clutch cap 421 to slide.

[0034] The clutch cap 421, connecting end cover 422, spring 423, clutch screw 424, and slide groove work together to achieve a reliable clutch function. Spring 423 ensures that clutch cap 421 always tends to move towards drive sleeve 411, maintaining the connection between the clutch part and drive sleeve 411 and ensuring normal operation in automatic mode. When switching to manual mode, the operator rotates clutch screw 424 to overcome the spring force of spring 423, causing clutch cap 421 to slide along connecting shaft 10, separating the male and female connectors, thereby disconnecting the power connection between drive sleeve 411 and connecting shaft 10, and achieving mode switching. The structure is simple, operation is convenient, and it can quickly and accurately switch between automatic and manual modes, with high reliability and stability. In actual use, the operator can easily switch modes by rotating clutch screw 424, and even in emergencies, the operation can be completed quickly, ensuring the safe operation of the equipment.

[0035] In some embodiments, the clutch screw 424 described above can be as follows: Figures 3 to 5 The structure shown. See also Figures 3 to 5 An auxiliary handle 4241 is provided on the extended end of the clutch screw 424.

[0036] An auxiliary handle 4241 is located at the extended end of the clutch screw 424, making it convenient for the operator to turn the clutch screw 424. When it is necessary to switch operating modes, the operator can turn the clutch screw 424 more easily and conveniently using the auxiliary handle 4241. Especially in emergency situations, it can quickly and accurately achieve mode switching, improving the efficiency and convenience of operation.

[0037] In some embodiments, the structure of the flip-up door 30 for the above-mentioned heat distortion and Vicat softening point temperature measuring instrument can be adopted as follows: Figure 6 , Figure 7 The structure shown. See also Figure 6 , Figure 7The structure of the top-opening door 30 of the heat distortion and Vicat softening point temperature measuring instrument also includes a position sensing mechanism 50, which includes: a first cam 51, a second cam 52, a first pressure sensor 53, a second pressure sensor 54, and a matching controller. The first cam 51 is fixed to the connecting shaft 10, and its axis is collinear with that of the connecting shaft 10. The second cam 52 is fixed to the connecting shaft 10, and its axis is collinear with that of the connecting shaft 10. The second cam 52 and the first cam 51 are installed at a staggered angle. The first pressure sensor 53 is fixed to the measuring instrument frame 60, and its pressure sensing end always abuts against the cam wall of the first cam 51. The second pressure sensor 54 is fixed to the measuring instrument frame 60, and its pressure sensing end always abuts against the cam wall of the second cam 52. The matching controller is electrically connected to the first pressure sensor 53, the second pressure sensor 54, and the drive structure 41.

[0038] The position sensing mechanism 50, through the coordinated operation of the first cam 51, the second cam 52, the first pressure sensor 53, the second pressure sensor 54, and the matching controller, can detect the position status of the lift-up door 30 in real time. The first cam 51 and the second cam 52 rotate with the connecting shaft 10, and the position changes of their cam walls are fed back to the matching controller via the first pressure sensor 53 and the second pressure sensor 54. The matching controller determines the position of the lift-up door 30 based on the received signals, thereby achieving automated control of the lift-up door 30's movement. The first pressure sensor 53 and the second pressure sensor 54 detect the closed and open states of the lift-up door 30, respectively. When the lift-up door 30 is detected to be fully open, the matching controller can control the drive structure 41 to stop working, preventing the lift-up door 30 from being over-opened and causing damage. When the lift-up door 30 is detected to be fully closed, the drive structure 41 can also be stopped in time to ensure that the lift-up door 30 is tightly closed. This automated control function not only improves the intelligence level of the equipment but also enhances its safety and reliability, reducing equipment damage and safety accidents caused by improper human operation.

[0039] In some embodiments, the connecting shaft 10 may be as follows: Figure 3 , Figure 7 The structure shown. See also Figure 3 , Figure 7 Bearings are provided at the rotating connection between the connecting shaft 10 and the measuring instrument frame 60.

[0040] A bearing is installed at the rotating connection between the connecting shaft 10 and the measuring instrument frame 60, which significantly reduces friction during the rotation of the connecting shaft 10. During long-term use, the connecting shaft 10 needs to rotate frequently. Without the support of a bearing, friction between the connecting shaft 10 and the frame would lead to increased energy loss, reduced equipment operating efficiency, and accelerated wear on both the connecting shaft 10 and the frame, shortening the equipment's lifespan. The use of a bearing effectively reduces frictional resistance, making the rotation of the connecting shaft 10 smoother, reducing energy loss, and improving equipment operating efficiency. Simultaneously, it reduces wear between the connecting shaft 10 and the frame, extending the equipment's lifespan and lowering maintenance costs.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flip-up door structure for a heat distortion and Vicat softening point temperature measuring instrument, characterized in that, include: A connecting shaft is horizontally positioned and rotatably mounted at the experimental operation port on the measuring instrument frame, with both ends of the connecting shaft extending out of the experimental operation port; One end of the connecting shaft is designated as the power end; The upward flipping mechanism is provided in two parts, which are spaced apart along the axis of the connecting shaft. One end of each upward flipping mechanism is fixedly connected to the connecting shaft, and the other end of each upward flipping mechanism extends outward in a direction perpendicular to the axis of the connecting shaft. The flip-up door connects the extended ends of the two flip-up mechanisms; the flip-up door has a closed state covering the experimental operation opening and an open state detached from the experimental operation opening and located above the experimental operation opening. A clutch drive mechanism is mounted on the measuring instrument frame and has a clutch part that can be connected to or separated from the power end. The clutch drive mechanism is used to form an automatic mode that automatically drives the connecting shaft to rotate when the clutch part is connected to the power end; and to form a manual mode when the clutch part is separated from the power end, causing the connecting shaft to lose power connection.

2. The upward-opening door structure for the heat distortion and Vicat softening point temperature measuring instrument as described in claim 1, characterized in that, The direction of the interval between the two upward flipping mechanisms is defined as the first direction, and the direction that is perpendicular to the first direction and horizontal is defined as the second direction; Each of the aforementioned upward-flipping mechanisms includes: A frame connecting seat is fixed on the measuring instrument frame, and the frame connecting seat is provided with a connecting hole for the connecting shaft to pass through; The L-shaped drive arm has a first short cantilever and a first long cantilever. When the flip-up door is in the unfolded state, the first short cantilever is arranged along the second direction. One end of the first short cantilever is fixed on the connecting shaft, and the other end of the first short cantilever extends outward toward the measuring instrument frame. The first long cantilever is arranged in the vertical direction. The bottom end of the first long cantilever is integrally connected to the extended end of the first short cantilever, and the top end of the first long cantilever extends upward in the vertical direction. An L-shaped auxiliary arm is spaced apart from the L-shaped drive arm along the first direction. The L-shaped auxiliary arm has a second short cantilever and a second long cantilever. When the flip-up door is in the unfolded state, the second short cantilever is arranged along the second direction and spaced apart from the first short cantilever along the vertical direction. One end of the second short cantilever is rotatably mounted on the frame connecting seat, and the rotation axis is arranged along the first direction. The other end of the second short cantilever extends outward toward the measuring instrument frame. The second long cantilever is arranged along the vertical direction. The bottom end of the second long cantilever is integrally connected to the extended end of the second short cantilever. The top end of the second long cantilever extends upward along the vertical direction. The middle connecting plate is vertically arranged when the flip-up door is in the unfolded state. The top end of the middle connecting plate is hinged to the middle section of the first long cantilever, and the bottom end of the middle connecting plate is hinged to the middle section of the second long cantilever. The door connector is hinged at the top to the top of the first long cantilever when the flip-up door is in the unfolded state, and hinged at the bottom to the top of the second long cantilever. The door connector is fixedly connected to the flip-up door.

3. The upward-opening door structure for the heat distortion and Vicat softening point temperature measuring instrument as described in claim 2, characterized in that, A connecting rod arranged along the first direction is connected between the two L-shaped drive arms, and the two ends of the connecting rod are respectively connected to the side walls of the two first short cantilever arms.

4. The upward-opening door structure for the heat distortion and Vicat softening point temperature measuring instrument as described in claim 2, characterized in that, The upward-opening door includes: The door frame is fixedly connected to both of the door connecting seats, and the door frame has a through opening extending along the second direction; An observation window is fixedly installed at the opening of the door frame. The door handle is installed on the door frame and is integrally connected to the door frame.

5. The upward-opening door structure for the heat distortion and Vicat softening point temperature measuring instrument as described in claim 1, characterized in that, The direction of the interval between the two upward flipping mechanisms is defined as the first direction, and the direction that is perpendicular to the first direction and horizontal is defined as the second direction; The clutch drive mechanism includes: A drive structure is fixed on the measuring instrument frame. The drive structure has a drive sleeve, which is rotatably mounted on the measuring instrument frame. The drive sleeve is sleeved on the connecting shaft and close to the power end. The drive sleeve is spaced apart from the connecting shaft. A female insertion end is provided on the end of the drive sleeve close to the power end. A clutch structure is provided at the power end of the connecting shaft. The clutch structure rotates with the connecting shaft. The clutch structure has a clutch part that can be connected to or separated from the drive sleeve. The clutch part is used to control the connection and separation of the drive sleeve from the connecting shaft.

6. The upward-opening door structure for the heat distortion and Vicat softening point temperature measuring instrument as described in claim 5, characterized in that, The clutch structure includes: A clutch cap has a clutch cylinder cavity with one open end. The clutch cap is coaxially sleeved on the power end of the connecting shaft and slidably disposed on the connecting shaft along the first direction. The open end of the clutch cap is provided with a plug-in male end that is adapted to the plug-in female end. The side wall of the clutch cap is provided with an opening. The clutch cap is the clutch part. A connecting end cap is coaxially mounted on the power end of the connecting shaft; A spring is sleeved on the connecting shaft, with the clutch cap and the connecting end cap connected to the two ends of the spring respectively. The spring is used to make the clutch cap tend to move toward the drive sleeve at all times. A clutch screw is coaxially arranged with the clutch cap. One end of the clutch screw abuts against the connecting end cover, and the other end of the clutch screw passes through the other end of the clutch cap and extends outward. The clutch screw is threadedly connected to the clutch cap, and the clutch screw is used to make the clutch cap slide by rotation. The connecting shaft is provided with a groove for the clutch cap to slide.

7. The upward-opening door structure for the heat distortion and Vicat softening point temperature measuring instrument as described in claim 6, characterized in that, An auxiliary handle is provided on the extended end of the clutch screw.

8. The upward-opening door structure for the heat distortion and Vicat softening point temperature measuring instrument as described in claim 5, characterized in that, The upward-opening door structure of the heat distortion and Vicat softening point temperature measuring instrument also includes a position sensing mechanism, which comprises: A first cam is fixed on the connecting shaft, and the axis of the first cam is collinear with the axis of the connecting shaft. The second cam is fixed on the connecting shaft, and the axis of the second cam is collinear with the axis of the connecting shaft. The second cam is installed at a different angle from the first cam. The first pressure sensor is fixed on the frame of the measuring instrument, and the pressure sensing end of the first pressure sensor is always in contact with the cam wall of the first cam. The second pressure sensor is fixed on the frame of the measuring instrument, and the pressure sensing end of the second pressure sensor is always in contact with the cam wall of the second cam. A matching controller is electrically connected to the first pressure sensor, the second pressure sensor, and the drive structure.

9. The upward-opening door structure for the heat distortion and Vicat softening point temperature measuring instrument as described in claim 1, characterized in that, Bearings are provided at the rotating connection points between the connecting shaft and the measuring instrument frame.

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