Detection tool

Abstract

The utility model relates to a testing fixture, which comprises a testing fixture body, a cooling system and a clamping piece, and is characterized in that the testing fixture body is provided with a laser scanning head; the cooling system comprises a cooling box and a cooling head, the cooling head is communicated with the cooling box through a pipeline assembly, and a cooling liquid circulation loop is formed; the cooling head is attached to the outer wall surface of the laser scanning head; and the cooling head is clamped on the laser scanning head by the clamping piece. Thus, the cooling box provides the cooling liquid for the cooling head, the cooling liquid circularly flows in the circulation loop, heat dissipated by the laser scanning head can be taken away, and heat dissipation of the laser scanning head is achieved; the cooling head is clamped on the laser scanning head through the clamping piece, so that the connection stability of the cooling head and the laser scanning head is improved, and meanwhile, the cooling head can be conveniently mounted and dismounted.

Description

Technical Field

[0001] The present application relates to the technical field of gauge equipment, and in particular to a gauge. Background Art

[0002] Inspection fixtures are simple tools used by industrial manufacturers to control various dimensions of products (such as aperture, space dimensions, etc.), improve production efficiency and control quality, and are suitable for mass-produced products such as automotive parts to replace professional measuring tools such as smooth plug gauges, thread plug gauges, and outer diameter calipers. Inspection fixtures use laser scanning heads to scan the products to be inspected. Laser scanning heads are prone to heat, resulting in a short life span of the laser scanning heads, which need to be replaced frequently. Utility Model Content

[0003] The present application provides a gauge to solve the heat dissipation problem of a laser scanning head in the gauge.

[0004] The present application provides a test tool, comprising:

[0005] A gauge body, wherein the gauge body is provided with a laser scanning head;

[0006] A cooling system, the cooling system comprising a cooling box and a cooling head, the cooling head being connected to the cooling box through a pipeline assembly to form a coolant circulation loop; the cooling head being attached to the outer wall surface of the laser scanning head;

[0007] A clamping piece is used to clamp the cooling head to the laser scanning head.

[0008] Furthermore, the inspection tool body further comprises a mounting frame, and the laser scanning head is mounted on the mounting frame;

[0009] The clamping member comprises:

[0010] A clamping block, one end of which is attached to a side of the cooling head away from the laser scanning head, and the other end of which is attached to the mounting frame; the clamping block is provided with a through hole;

[0011] A fastener is passed through the through hole and connected to the mounting bracket and / or the cooling head so that the cooling head is closely attached to the outer wall surface of the laser scanning head.

[0012] Further, the clamping block includes a first clamping wall, a connecting wall and a second clamping wall, wherein the first clamping wall, the connecting wall and the second clamping wall are sequentially connected as a whole to form a U-shaped structure; the cooling head, the laser scanning head and the mounting frame are located between the first clamping wall and the second clamping wall; wherein the first clamping wall is attached to the cooling head, and the second clamping wall is attached to the mounting frame;

[0013] At least one of the first clamping wall, the connecting wall and the second clamping wall is provided with the through hole.

[0014] Furthermore, the fastener is a bolt.

[0015] Furthermore, there are multiple laser scanning heads, multiple cooling heads, and the outer wall surface of each laser scanning head is correspondingly attached with the cooling head;

[0016] The pipeline assembly includes a liquid inlet pipe assembly and a liquid return pipe assembly. Each cooling head is connected to the liquid outlet of the cooling box through the liquid inlet pipe assembly; each cooling head is connected to the liquid return port of the cooling box through the liquid return pipe assembly.

[0017] Furthermore, the cooling system also includes a first collecting block, a main liquid inlet pipe and a plurality of liquid inlet branches, the two ends of the main liquid inlet pipe are respectively connected to the liquid outlet of the cooling box and the first collecting block, and the plurality of liquid inlet branches are respectively connected to the first collecting block so that the liquid inlet branches are connected to the main liquid inlet pipe through the first collecting block; one end of each of the liquid inlet branches away from the first collecting block is connected to the liquid inlet of a cooling head.

[0018] Furthermore, the cooling system also includes a second collecting block, a main liquid return pipe and a plurality of liquid return branch pipes, the two ends of the main liquid return pipe are respectively connected to the liquid return port of the cooling box and the second collecting block, and the plurality of liquid return branch pipes are respectively connected to the second collecting block so that the liquid return branch pipes are connected to the main liquid return pipe through the second collecting block; one end of each liquid return branch pipe of the second collecting block is connected to the liquid return port of a cooling head.

[0019] Furthermore, a liquid level sensor is provided in the cooling box, and a solution indicator is provided in the cooling box body. The solution indicator is electrically connected to the liquid level sensor to display the remaining amount of coolant in the cooling box detected by the liquid level sensor.

[0020] Furthermore, a temperature sensor is provided in the cooling box, and a temperature indicator is provided on the cooling box body. The temperature indicator is electrically connected to the temperature sensor to display the temperature of the coolant in the cooling box detected by the temperature sensor.

[0021] Furthermore, the cooling box is provided with a coolant filling port.

[0022] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0023] The inspection tool provided in the embodiment of the present application includes an inspection tool body, a cooling system and a clamping piece. The inspection tool body is provided with a laser scanning head; the cooling system includes a cooling box and a cooling head. The cooling head is connected to the cooling box through a pipeline assembly to form a coolant circulation loop; the cooling head is attached to the outer wall surface of the laser scanning head; the clamping piece clamps the cooling head to the laser scanning head. In this way, the cooling box provides coolant to the cooling head, and the coolant circulates in the circulation loop, which can take away the heat emitted by the laser scanning head to achieve heat dissipation of the laser scanning head; the clamping piece clamps the cooling head to the laser scanning head to improve the connection stability between the cooling head and the laser scanning head, and at the same time facilitates the installation and disassembly of the cooling head. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0027] Figure 1 A schematic diagram of the structure of a test fixture provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of a cooling system in a gauge provided in an embodiment of the present application;

[0029] Figure 3 for Figure 2 Schematic diagram of the structure of the cooling box.

[0030] Description of reference numerals:

[0031] 1. Checking fixture body; 11. Laser scanning head; 12. Mounting frame;

[0032] 2. Cooling system; 21. Cooling box; 211. Solution indicator; 212. Temperature indicator; 213. Coolant filling port; 214. Switch; 22. Cooling head; 231. Liquid inlet pipe assembly; 2311. First manifold; 2312. Main liquid inlet pipe; 2313. Liquid inlet branch pipe; 232. Liquid return pipe assembly; 2321. Second manifold; 2322. Main liquid return pipe; 2323. Liquid return branch pipe;

[0033] 3. Clamping piece; 31. Clamping block; 311. First clamping wall; 312. Connecting wall; 313. Second clamping wall; 32. Fastener. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0036] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0037] The present application provides a gauge, which can achieve heat dissipation for a laser scanning head 11 in the gauge and improve the connection stability of a cooling head 22 .

[0038] Figures 1 to 3 A gauge provided in an embodiment of the present application includes a gauge body 1, a cooling system 2, and a clamping member 3. The gauge body 1 is provided with a laser scanning head 11; the gauge body 1 provides an installation base for the laser scanning head 11, and the gauge body 1 is provided with a position for placing the product to be inspected; the cooling system 2 includes a cooling box 21 and a cooling head 22, the cooling head 22 is connected to the cooling box 21 through a pipeline assembly, and forms a coolant circulation loop; the cooling head 22 is attached to the outer wall surface of the laser scanning head 11; the clamping member 3 clamps the cooling head 22 to the laser scanning head 11. In this way, the cooling box 21 provides cooling liquid to the cooling head 22, and the cooling liquid circulates in the circulation loop, which can take away the heat emitted by the laser scanning head 11 to achieve heat dissipation of the laser scanning head 11; the clamping member 3 clamps the cooling head 22 to the laser scanning head 11 to improve the connection stability between the cooling head 22 and the laser scanning head 11, and at the same time, it can facilitate the installation and disassembly of the cooling head 22.

[0039] Among them, Figure 1 As shown, the cooling head 22 is in a flat plate shape, and the wide surface of the cooling head 22 is attached to the laser scanning head 11, so that the contact between the cooling head 22 and the laser scanning head 11 is surface contact, which can increase the heat dissipation area and further improve the heat dissipation effect.

[0040] like Figure 1 As shown, in the technical solution of this embodiment, the gauge body 1 further includes a mounting frame 12, and the laser scanning head 11 is mounted on the mounting frame 12; the gauge body 1 has a frame, the mounting frame 12 is arranged on the frame, and the laser scanning head 11 is arranged on the mounting frame 12. In this way, the mounting frame 12 provides an installation base for the laser scanning head 11.

[0041] The clamping member 3 includes a clamping block 31 and a fastener 32. One end of the clamping block 31 is attached to the side of the cooling head 22 away from the laser scanning head 11, and the other end is attached to the mounting frame 12. The clamping block 31 is provided with a through hole. The fastener 32 is passed through the through hole and is connected to the mounting frame 12 and / or the cooling head 22 so that the cooling head 22 is tightly attached to the outer wall surface of the laser scanning head 11.

[0042] It can be understood that when the fastener 32 is tightened, the clamp 31 can be used to lock the mounting frame 12 and the cooling head 22 through the fastener 32, and when the fastener 32 is loosened, the clamp 31 can be used to unlock the mounting frame 12 and the cooling head 22. That is, the above design realizes the locking or unlocking of the clamp 3 and the cooling head 22 through the cooperation of the clamp 31 and the fastener 32, so as to facilitate the installation and disassembly of the cooling head 22.

[0043] like Figure 1 As shown, in the technical solution of this embodiment, the clamp block 31 includes a first clamping wall 311, a connecting wall 312 and a second clamping wall 313, the first clamping wall 311, the connecting wall 312 and the second clamping wall 313 are sequentially connected as a whole to form a U-shaped structure; the cooling head 22, the laser scanning head 11 and the mounting frame 12 are located between the first clamping wall 311 and the second clamping wall 313; wherein the first clamping wall 311 is attached to the cooling head 22, and the second clamping wall 313 is attached to the mounting frame 12; at least one of the first clamping wall 311, the connecting wall 312 and the second clamping wall 313 is provided with a through hole. In this embodiment, the structure of the clamp block 31 is simple, easy to process, and the installation of the clamp block 31 is simple and convenient.

[0044] In this embodiment, the first clamping wall 311 and the connecting wall 312 are vertically arranged, and the second clamping wall 313 and the connecting wall 312 are vertically arranged. The first clamping wall 311, the connecting wall 312, and the second clamping wall 313 are respectively flat plate structures, so that the contact between the first clamping wall 311 and the mounting frame 12 is surface contact, and the contact between the second clamping wall 313 and the cooling head 22 is surface contact, which can improve the connection stability. At the same time, it can disperse the pressure of the clamping wall on the cooling head 22 to avoid crushing the cooling head 22.

[0045] like Figure 1 As shown, a through hole is provided in the second clamping wall 313, and a fastener 32 is provided through the second clamping wall 313 and connected to the mounting frame 12. In other embodiments, through holes may be provided in both the first clamping wall 311 and the second clamping wall 313, and fasteners 32 are provided in the through holes, and the fasteners 32 are connected to the mounting frame 12 and the cooling head 22, and clamping is performed from both ends to improve the clamping strength.

[0046] In the technical solution of this embodiment, the fastener 32 is a bolt. It can be understood that using a bolt as the fastener 32 can facilitate tightening and loosening operations.

[0047] like Figure 1 and Figure 2 As shown, in order to improve the inspection efficiency of the inspection tool and perform laser scanning on the product to be inspected from multiple angles, in the technical solution of this embodiment, there are multiple laser scanning heads 11, multiple cooling heads 22, and the outer wall surface of each laser scanning head 11 is correspondingly attached with a cooling head 22. A cooling head 22 is provided at each laser scanning head 11, and each laser scanning head 11 can be cooled and dissipated separately.

[0048] The pipeline assembly includes a liquid inlet pipe assembly 231 and a liquid return pipe assembly 232. Each cooling head 22 is connected to the liquid outlet of the cooling box 21 through the liquid inlet pipe assembly 231; each cooling head 22 is connected to the liquid return port of the cooling box 21 through the liquid return pipe assembly 232. It can be understood that by setting the liquid inlet pipe assembly 231 and the liquid return pipe assembly 232, a cooling circulation loop can be formed between each cooling head 22 and the cooling box 21.

[0049] like Figure 2 As shown, in the technical solution of this embodiment, the cooling system 2 also includes a first collecting block 2311, a main liquid inlet pipe 2312 and a plurality of liquid inlet branches 2313, the two ends of the main liquid inlet pipe 2312 are respectively connected to the liquid outlet of the cooling box 21 and the first collecting block 2311, and the plurality of liquid inlet branches 2313 are respectively connected to the first collecting block 2311 so that the liquid inlet branches 2313 are connected to the main liquid inlet pipe 2312 through the first collecting block 2311; one end of each liquid inlet branch 2313 away from the first collecting block 2311 is connected to the liquid inlet of a cooling head 22.

[0050] It can be understood that the coolant flowing out of the main liquid inlet pipe 2312 is divided into multiple branches through the first manifold block 2311, and enters multiple liquid inlet branch pipes 2313 respectively, so as to provide coolant for multiple cooling heads 22 respectively.

[0051] Compared with the arrangement of multiple liquid outlets in the box body, in this embodiment, only one liquid outlet is arranged in the box body to supply coolant to multiple cooling heads 22 . Furthermore, by setting the first manifold block 2311 , the coolant can be evenly distributed according to the number of cooling heads 22 .

[0052] like Figure 2 As shown, in the technical solution of this embodiment, the cooling system 2 also includes a second collecting block 2321, a main liquid return pipe 2322 and a plurality of liquid return branches 2323, the two ends of the main liquid return pipe 2322 are respectively connected to the liquid return port of the cooling box 21 and the second collecting block 2321, and the plurality of liquid return branches 2323 are respectively connected to the second collecting block 2321, so that the liquid return branches 2323 are connected to the main liquid return pipe 2322 through the second collecting block 2321; one end of each liquid return branch 2323 of the second collecting block 2321 is connected to the liquid return port of a cooling head 22.

[0053] It can be understood that, through the second manifold block 2321, the coolant after absorbing heat from multiple cooling heads 22 enters the second manifold block 2321 through the return branch pipe 2323, and converges at the second manifold block 2321, and then flows back to the cooling box 21 through the main return pipe 2322. The coolant flowing back to the cooling box 21 can be cooled in the cooling box 21, and then continue to flow out from the liquid inlet to achieve circulating cooling.

[0054] Compared with the arrangement of arranging multiple liquid return ports on the housing, in this embodiment, only one liquid return port is arranged on the housing to realize the recovery of the coolant flowing out of multiple cooling heads 22 .

[0055] like Figure 3 As shown, in the technical solution of this embodiment, a liquid level sensor is provided in the cooling box 21, and the box body of the cooling box 21 is provided with a solution indicator 211, and the solution indicator 211 is electrically connected to the liquid level sensor to display the remaining amount of coolant in the cooling box 21 detected by the liquid level sensor.

[0056] It can be understood that by setting up a liquid level sensor, the remaining amount of coolant in the box can be detected. Although the coolant is circulating in a circulation loop, there is still a problem of consumption. The remaining amount of coolant can be monitored in real time through the monitoring of the liquid level sensor. At the same time, it can be displayed through the solution indicator 211, which can facilitate the user to intuitively understand the remaining coolant in the cooling box 21 so as to add coolant in time.

[0057] Furthermore, since there are multiple cooling heads 22, each cooling head 22 corresponds to a cooling circulation loop, that is, there is coolant in each circulation loop, and there may be a problem of insufficient coolant supply. At this time, coolant can be added in time according to the display of the solution indicator 211 to ensure that each circulation loop has sufficient coolant.

[0058] like Figure 3 As shown, in the technical solution of this embodiment, a temperature sensor is provided in the cooling box 21, and the box body of the cooling box 21 is provided with a temperature indicator 212, and the temperature indicator 212 is electrically connected to the temperature sensor to display the temperature of the coolant in the cooling box 21 detected by the temperature sensor.

[0059] It can be understood that the temperature of the coolant in the box can be detected by the temperature sensor, and whether the cooling box 21 can cool the coolant normally can be monitored in time, and the temperature indicator 212 can allow the user to intuitively understand the temperature of the coolant. Once the temperature is abnormal, the cooling system 2 can be checked and repaired in time.

[0060] In some other embodiments, a temperature abnormality alarm is further provided at the temperature indicator 212. When the temperature detected by the temperature sensor exceeds a set value, an alarm is given through the temperature abnormality alarm.

[0061] like Figure 3 As shown, in the technical solution of this embodiment, the cooling box 21 is provided with a cooling liquid filling port 213. It can be understood that by providing the cooling liquid filling port 213, it is convenient to add cooling liquid into the cooling box 21.

[0062] like Figure 3As shown, in the technical solution of this embodiment, the cooling box 21 is also provided with a switch 214 to control the start and stop of the cooling system.

[0063] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0064] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0065] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A checking tool, characterized in that: include: A gauge body (1), wherein the gauge body (1) is provided with a laser scanning head (11); A cooling system (2), the cooling system (2) comprising a cooling box (21) and a cooling head (22), the cooling head (22) being connected to the cooling box (21) via a pipeline assembly to form a cooling liquid circulation loop; the cooling head (22) being attached to the outer wall surface of the laser scanning head (11); A clamping piece (3), wherein the clamping piece (3) clamps the cooling head (22) to the laser scanning head (11).

2. The gauge according to claim 1, characterized in that: The gauge body (1) further comprises a mounting frame (12), and the laser scanning head (11) is mounted on the mounting frame (12); The clamping member (3) comprises: A clamping block (31), one end of the clamping block (31) being attached to a side of the cooling head (22) away from the laser scanning head (11), and the other end of the clamping block (31) being attached to the mounting frame (12); the clamping block (31) being provided with a through hole; A fastener (32), wherein the fastener (32) is inserted into the through hole and connected to the mounting frame (12) and / or the cooling head (22), so that the cooling head (22) is closely attached to the outer wall surface of the laser scanning head (11).

3. The gauge according to claim 2, characterized in that: The clamping block (31) comprises a first clamping wall (311), a connecting wall (312) and a second clamping wall (313), wherein the first clamping wall (311), the connecting wall (312) and the second clamping wall (313) are sequentially connected as a whole to form a U-shaped structure; the cooling head (22), the laser scanning head (11) and the mounting frame (12) are located between the first clamping wall (311) and the second clamping wall (313); wherein the first clamping wall (311) is attached to the cooling head (22), and the second clamping wall (313) is attached to the mounting frame (12); At least one of the first clamping wall (311), the connecting wall (312) and the second clamping wall (313) is provided with the through hole.

4. The gauge according to claim 2, characterized in that: The fastener (32) is a bolt.

5. The gauge according to claim 1, characterized in that: There are a plurality of laser scanning heads (11), a plurality of cooling heads (22), and a cooling head (22) is correspondingly attached to the outer wall surface of each laser scanning head (11); The pipeline assembly comprises a liquid inlet pipe assembly (231) and a liquid return pipe assembly (232); each of the cooling heads (22) is connected to the liquid outlet of the cooling box (21) via the liquid inlet pipe assembly (231); and each of the cooling heads (22) is connected to the liquid return port of the cooling box (21) via the liquid return pipe assembly (232).

6. The gauge according to claim 5, characterized in that: The cooling system (2) further comprises a first manifold (2311), a main liquid inlet pipe (2312) and a plurality of liquid inlet branch pipes (2313); the two ends of the main liquid inlet pipe (2312) are respectively connected to the liquid outlet of the cooling box (21) and the first manifold (2311); the plurality of liquid inlet branch pipes (2313) are respectively connected to the first manifold (2311) so that the liquid inlet branch pipes (2313) are connected to the main liquid inlet pipe (2312) through the first manifold (2311); and one end of each liquid inlet branch pipe (2313) away from the first manifold (2311) is connected to the liquid inlet of a cooling head (22).

7. The gauge according to claim 5, characterized in that: The cooling system (2) further comprises a second manifold block (2321), a main liquid return pipe (2322) and a plurality of liquid return branch pipes (2323); the two ends of the main liquid return pipe (2322) are respectively connected to the liquid return port of the cooling box (21) and the second manifold block (2321); the plurality of liquid return branch pipes (2323) are respectively connected to the second manifold block (2321) so that the liquid return branch pipes (2323) are connected to the main liquid return pipe (2322) through the second manifold block (2321); and one end of each liquid return branch pipe (2323) of the second manifold block (2321) is connected to the liquid return port of a cooling head (22).

8. The gauge according to claim 1, characterized in that: A liquid level sensor is provided in the cooling box (21), and a solution indicator (211) is provided in the cooling box (21). The solution indicator (211) is electrically connected to the liquid level sensor to display the remaining amount of coolant in the cooling box (21) detected by the liquid level sensor.

9. The gauge according to claim 1, characterized in that: A temperature sensor is provided in the cooling box (21), and a temperature indicator (212) is provided in the cooling box body (21). The temperature indicator (212) is electrically connected to the temperature sensor to display the temperature of the coolant in the cooling box (21) detected by the temperature sensor.

10. The gauge according to claim 1, characterized in that: The cooling box (21) is provided with a cooling liquid filling port (213).

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