Temperature measuring mechanism

Abstract

The utility model discloses a temperature measuring mechanism, which relates to the technical field of battery manufacturing, and comprises a rack used for placing a workpiece to be subjected to temperature measurement; the positioning assembly is arranged on the rack, and the positioning assembly is used for positioning the workpiece on the rack; the driving assembly is arranged on the rack; and the driving assembly is in transmission connection with the temperature measuring probe, so that the temperature measuring probe moves towards the workpiece to be in contact with the workpiece so as to detect the temperature of the workpiece. According to the technical scheme provided by the utility model, the temperature of the workpiece is detected through contact between the temperature measuring probe and the workpiece, the temperature detection accuracy is improved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a temperature measuring mechanism. Background Art

[0002] Battery temperature measurement is generally achieved by sensing and measuring the intensity of infrared radiation emitted by the battery through an infrared temperature sensor. The intensity is proportional to the temperature. The intensity information is used to calculate the surface temperature of the object, and the next process is determined based on the temperature of the battery surface. The emissivity is the ability of different objects to emit infrared radiation. Accurate emissivity helps to accurately measure temperature. The higher the emissivity, the stronger the infrared radiation ability, and the higher the temperature measurement accuracy. Generally, the emissivity of an aluminum shell battery after polishing is 0.2, and the infrared temperature sensor is only suitable for measuring objects with an emissivity greater than 0.6. The battery has a low emissivity, which will cause inaccurate battery temperature measurement data, affecting the battery filling effect, and the inability to obtain the true temperature, posing a safety hazard. Utility Model Content

[0003] The main purpose of the utility model is to provide a temperature measuring mechanism, aiming to improve the accuracy of battery temperature measurement and increase the safety factor.

[0004] In order to achieve the above-mentioned purpose, the temperature measuring mechanism proposed by the utility model comprises:

[0005] A rack, used to place the workpiece to be temperature measured;

[0006] A positioning assembly, disposed on the frame, and used for positioning the workpiece on the frame;

[0007] A driving assembly, disposed on the frame; and

[0008] The temperature measuring probe is connected to the driving assembly in a transmission manner so that the temperature measuring probe moves toward the workpiece and contacts the workpiece to detect the temperature of the workpiece.

[0009] In one embodiment, a coating is provided on the outer periphery of the temperature measuring probe, and the material of the coating is Teflon.

[0010] In one embodiment, the drive assembly comprises:

[0011] A mounting frame, arranged on the frame;

[0012] A linear drive component is disposed on the mounting frame, and the linear drive component is transmission-connected with the temperature measuring probe to drive the temperature measuring probe to move toward the workpiece.

[0013] In one embodiment, the drive assembly further includes a mounting plate and an insulating plate, the linear drive member drives the mounting plate to move toward the workpiece, the insulating plate is mounted on one end of the mounting plate away from the linear drive member, and the temperature measuring probe is mounted on the insulating plate.

[0014] In one embodiment, the positioning assembly comprises:

[0015] A telescopic member, comprising a fixed end and a telescopic end connected to the fixed end, wherein the fixed end is arranged on both sides of the frame;

[0016] A push plate is transmission-connected with the telescopic end, and the telescopic end drives the push plate to move toward the workpiece to position the workpiece.

[0017] In one embodiment, the push plate is provided with at least one through hole, the number of the through holes is consistent with the number of the temperature measuring probes, and the driving assembly drives the temperature measuring probe to move so that the temperature measuring probe passes through the through hole and contacts the workpiece.

[0018] In one embodiment, the temperature measuring mechanism further includes a vertical plate, which is disposed on the top of the frame and is flush with two ends of the workpiece in the length direction, and the telescopic member drives the push plate to move along the first direction so that the push plate abuts against the vertical plate.

[0019] In one embodiment, the temperature measuring mechanism also includes a slider and a slide rail, the slide rail is arranged on the top of the frame and extends along the second direction, at least two sliders are arranged, one workpiece is arranged between every two adjacent sliders, and the slider is slidably connected to the slide rail so that the distance between any two adjacent sliders is adjustable.

[0020] In one embodiment, the frame is provided with a slide groove extending along the first direction, and the vertical plate is slidably connected to the slide groove to position workpieces of different lengths.

[0021] In one embodiment, the temperature measuring mechanism further includes a support leg, which is disposed at the bottom of the rack and is threadedly connected to the rack to adjust the height of the rack.

[0022] In the technical solution of the utility model, a frame is used to carry a workpiece to be temperature measured, and a driving assembly and a temperature measuring probe are arranged on one side of the frame. The driving assembly drives the temperature measuring probe to move toward the workpiece on the frame so that the temperature measuring probe contacts the workpiece and obtains the temperature of the workpiece. A positioning assembly is also arranged on one side of the frame. When the workpiece is placed on the frame, the positioning assembly is used to position the workpiece to prevent the workpiece from moving, so that the contact between the temperature measuring probe and the workpiece is more stable, the temperature data obtained is more accurate, and the safety of operation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of an embodiment of a temperature measuring mechanism provided by the utility model;

[0025] Figure 2 A schematic structural diagram of another embodiment of the temperature measuring mechanism provided by the utility model;

[0026] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0027] Figure 4 This is a structural schematic diagram of the temperature measuring mechanism drive assembly and the temperature measuring probe provided by the utility model.

[0028] Description of Figure Numbers:

[0029] 100, rack; 110, slide; 120, support foot;

[0030] 200, positioning assembly; 210, telescopic member; 220, push plate; 221, through hole; 230, support frame;

[0031] 300, driving assembly; 310, mounting frame; 320, linear driving member; 330, mounting plate; 340, insulating plate;

[0032] 400, temperature measuring probe;

[0033] 500, vertical board;

[0034] 600, slider; 610, slide rail;

[0035] 700. Workpiece.

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] Battery temperature measurement is generally achieved by sensing and measuring the intensity of infrared radiation emitted by the battery through an infrared temperature sensor. The intensity is proportional to the temperature. The intensity information is used to calculate the surface temperature of the object, and the next process is determined based on the temperature of the battery surface. The emissivity is the ability of different objects to emit infrared radiation. Accurate emissivity helps to accurately measure temperature. The higher the emissivity, the stronger the infrared radiation capability, and the higher the temperature measurement accuracy. In particular, surface polishing will also reduce the emissivity. Generally, the emissivity of aluminum shell batteries after polishing is 0.2. Infrared temperature sensors are only suitable for measuring objects with an emissivity greater than 0.6. The battery has a low emissivity, which will cause inaccurate battery temperature measurement data and affect the battery filling effect. Whether the cooling mechanism fails also needs to be fed back through temperature. When the cooling mechanism fails, the battery cannot obtain the actual cooling temperature. The surface temperature of the battery after baking is high, which is easy to burn and poses a safety hazard.

[0041] The utility model provides a temperature measuring mechanism.

[0042] See also Figure 1 In one embodiment of the present utility model, the temperature measuring mechanism comprises:

[0043] The rack 100 is used to place the workpiece 700 to be temperature measured;

[0044] A positioning assembly 200 is provided on the frame 100 , and the positioning assembly 200 is used to position the workpiece 700 on the frame 100 ;

[0045] A driving assembly 300 is disposed on the frame 100; and

[0046] The temperature measuring probe 400 and the driving assembly 300 are connected to the temperature measuring probe 400 in a transmission manner, so that the temperature measuring probe 400 moves toward the workpiece 700 and contacts the workpiece 700 to detect the temperature of the workpiece 700 .

[0047] In the technical solution of the utility model, a frame 100 is used to carry a workpiece 700 to be temperature-measured, and a driving assembly 300 and a temperature measuring probe 400 are arranged on one side of the frame 100. The driving assembly 300 drives the temperature measuring probe 400 to move toward the workpiece 700 on the frame 100, so that the temperature measuring probe 400 contacts the workpiece 700 and obtains the temperature of the workpiece 700. A positioning assembly 200 is also arranged on one side of the frame 100. When the workpiece 700 is placed on the frame 100, the positioning assembly 200 is used to position the workpiece 700 to prevent the workpiece 700 from moving, so that the contact between the temperature measuring probe 400 and the workpiece 700 is more stable, the obtained temperature data is more accurate, and the safety of operation is improved.

[0048] Among them, in this embodiment, the workpiece 700 to be temperature measured is a battery, and the battery is placed horizontally on the top of the rack 100. The temperature measuring probe 400 contacts one end of the battery pole to detect the temperature of the battery. After accurately obtaining the temperature of the battery, it is convenient to carry out subsequent operations, improve the injection effect, and reduce safety hazards. The sensitive element in the temperature measuring probe 400 can be a thermocouple, a thermal resistor or a thermistor. The temperature measuring probe 400 contacts the battery to obtain an accurate temperature value and express the temperature of the workpiece 700 through a thermometer, and the data is intuitively visualized.

[0049] In the embodiment of the present invention, a coating is provided on the outer periphery of the temperature measuring probe 400, and the material of the coating is Teflon.

[0050] Specifically, by providing a Teflon coating on the surface of the temperature measuring probe 400, on the one hand, the probe can be protected. On the other hand, due to the low friction coefficient of the Teflon coating, the temperature measuring probe 400 can be prevented from scratching the battery when in contact with the battery. In addition, Teflon can withstand higher operating temperatures, making it easier to contact the workpiece 700 to detect the temperature.

[0051] In an embodiment of the present utility model, the driving assembly 300 includes:

[0052] A mounting frame 310, provided on the frame 100;

[0053] The linear driving member 320 is disposed on the mounting frame 310 , and the linear driving member 320 is transmission-connected with the temperature measuring probe 400 to drive the temperature measuring probe 400 to move toward the workpiece 700 .

[0054] Please refer to Figure 2 , Figure 3 and Figure 4 The drive assembly 300 includes a mounting frame 310 and a linear drive member 320. The mounting frame 310 is installed on one side of the frame 100. The mounting frame 310 includes an "L"-shaped bracket and a plate body arranged on the top of the bracket. The linear drive member 320 includes a mounting end and an output end. The mounting end is fixed on the top of the plate body, and the output end is arranged on the side of the mounting end facing the workpiece 700. The temperature measuring probe 400 is installed on the side of the output end away from the mounting end, and moves toward the workpiece 700 under the drive of the output end. The linear drive member 320 can adopt a structure that can move linearly, such as a cylinder, a hydraulic cylinder or a linear electric push rod. In this embodiment, the linear drive member 320 adopts a cylinder, and the cylinder body is installed on the plate body. The piston rod is connected to the temperature measuring probe 400. The temperature measuring probe 400 is moved toward or away from the workpiece 700 by the extension and contraction of the piston rod in the cylinder body, so that when the temperature needs to be detected, the workpiece 700 is contacted and the temperature value is obtained. The cylinder includes a throttle valve, which can be used to control the extension speed of the piston rod.

[0055] In an embodiment of the utility model, the driving assembly 300 also includes a mounting plate 330 and an insulating plate 340. The linear driving member 320 drives the mounting plate 330 to move toward the workpiece 700. The insulating plate 340 is installed at one end of the mounting plate 330 away from the linear driving member 320. The temperature measuring probe 400 is installed on the insulating plate 340.

[0056] Please refer to Figure 4 An end of the output end away from the mounting end is connected to a mounting plate 330, and at least one insulating plate 340 is arranged on the mounting plate 330. The insulating plates 340 are arranged at intervals along the second direction, and each temperature measuring probe 400 is correspondingly arranged on an insulating plate 340. A plurality of workpieces 700 are arranged at intervals along the second direction, and one temperature measuring probe 400 corresponds to one workpiece 700, that is, by arranging a plurality of temperature measuring probes 400, the temperatures of a plurality of workpieces 700 can be detected simultaneously. In addition, the insulating plate 340 is made of a glass fiber board, which has good flame retardancy, insulation and corrosion resistance.

[0057] In an embodiment of the present utility model, the positioning assembly 200 includes:

[0058] The telescopic member 210 has a fixed end and a telescopic end connected to the fixed end, and the fixed end is arranged on both sides of the frame 100;

[0059] The push plate 220 is transmission-connected to the telescopic end, and the telescopic end drives the push plate 220 to move toward the workpiece 700 to position the workpiece 700 .

[0060] Please refer to Figure 1 , Figure 2 and Figure 3 The positioning assembly 200 is arranged on both sides of the frame 100, that is, a positioning assembly 200 is respectively arranged at both ends of the length direction of the workpiece 700. The telescopic member 210 includes a fixed end and a telescopic end. The fixed end is installed on the frame 100 through a support frame 230. The fixed end is fixed on the top of the support frame 230. The telescopic end is installed on the side of the fixed end facing the workpiece 700, and extends or retracts toward the workpiece 700. A push plate 220 is arranged on the side of the telescopic end away from the fixed end. The telescopic end drives the push plate 220 to move toward the workpiece 700. The push plates 220 at both ends of the length direction of the workpiece 700 are used to press the workpiece 700 to prevent the workpiece 700 from moving when the probe contacts the workpiece 700, thereby affecting the accuracy of the temperature measurement data.

[0061] It should be noted that the positioning assembly 200 is arranged at both ends of the workpiece 700 in the length direction, while the driving assembly 300 and the temperature measuring probe 400 are arranged at one end in the length direction, that is, at one end of the workpiece 700 in the length direction, the driving assembly 300 is adjacent to the positioning assembly 200, and at the other end, only the positioning assembly 200 is arranged to limit the workpiece 700, wherein the support frame 230 is installed on the frame 100, and the telescopic member 210 is installed on the top, "L"-shaped brackets are installed on both sides of the support frame 230 and a plate body is installed on the top of the bracket, the linear driving member 320 is installed on the plate body, the telescopic member 210 drives the push plate 220 to move toward the workpiece 700 to limit the workpiece 700, and the linear driving member 320 drives the mounting plate 330 and the temperature measuring probe 400 to move toward the workpiece 700 and contact the workpiece 700 for temperature measurement.

[0062] The telescopic member 210 may be a structure capable of linear movement, such as a cylinder, a hydraulic cylinder or a linear electric push rod. In this embodiment, the telescopic member 210 is a cylinder, and the push plate 220 is pushed by the piston rod of the cylinder.

[0063] In an embodiment of the present invention, the push plate 220 is provided with at least one through hole 221 , the number of the through holes 221 is consistent with the number of the temperature measuring probes 400 , and the driving assembly 300 drives the temperature measuring probes 400 to move so that the temperature measuring probes 400 pass through the through holes 221 and contact the workpiece 700 .

[0064] Please refer to Figure 2 and Figure 3A plurality of through holes 221 are arranged on the push plate 220 at intervals along the second direction, and each through hole 221 corresponds to the temperature measuring probe 400. When the linear driving member 320 drives the mounting plate 330 and the temperature measuring probe 400 to move toward the workpiece 700, each temperature measuring probe 400 passes through the corresponding through hole 221 and contacts the workpiece 700 for temperature measurement. The push plate 220 can be used to stabilize the workpiece 700 from moving and improve the accuracy of temperature measurement.

[0065] In an embodiment of the utility model, the temperature measuring mechanism also includes a vertical plate 500, which is arranged on the top of the frame 100 and is flush with the two ends of the workpiece 700 in the length direction. The telescopic member 210 drives the push plate 220 to move along the first direction so that the push plate 220 abuts against the vertical plate 500.

[0066] Please refer to Figure 1 , Figure 2 and Figure 3 The vertical plate 500 is installed on the top of the frame 100, and a vertical plate 500 is installed at both ends of each group of workpieces 700 in the length direction. The end surface of the vertical plate 500 is flush with the end of the workpiece 700. The first direction is the length direction of the workpiece 700. When the telescopic member 210 drives the push plate 220 to move along the first direction, that is, moves toward the workpiece 700, the push plate 220 abuts against the vertical plate 500 to clamp the battery to prevent direct connection with the battery pole and compression and deformation of the battery.

[0067] In an embodiment of the utility model, the temperature measuring mechanism also includes a slider 600 and a slide rail 610. The slide rail 610 is arranged on the top of the frame 100 and extends along the second direction. At least two sliders 600 are arranged, and a workpiece 700 is arranged between every two adjacent sliders 600. The slider 600 is slidably connected to the slide rail 610 so that the distance between any two adjacent sliders 600 is adjustable.

[0068] Please refer to Figure 2 and Figure 3The slide rail 610 is arranged on the top of the frame 100 and extends along the second direction. The second direction is the direction in which the workpieces 700 are arranged at intervals. The first direction is the length direction of the workpiece 700, and the first direction is perpendicular to the second direction. A plurality of sliders 600 are arranged at intervals on the slide rail 610. There is a workpiece 700 between any two adjacent sliders 600. The workpiece 700 is clamped by two adjacent sliders 600 to prevent the workpiece 700 from moving in the second direction. The two adjacent workpieces 700 can also be separated by the sliders 600, which is convenient for each measurement. The temperature probe 400 measures the temperature of the corresponding workpiece 700. In addition, since the slider 600 slides on the slide rail 610, the distance between any two sliders 600 is adjustable. When the thickness of the workpiece 700 is relatively large, the position of the slider 600 on the slide rail 610 can be adjusted to increase the distance between any two sliders 600 to accommodate thicker workpieces 700. Similarly, when the thickness of the workpiece 700 is relatively small, the position of the slider 600 on the slide rail 610 can be adjusted to reduce the distance between any two sliders 600 to accommodate workpieces 700 with smaller thickness.

[0069] In the embodiment of the present invention, the frame 100 is provided with a slide groove 110 , the slide groove 110 extends along a first direction, and the vertical plate 500 is slidably connected to the slide groove 110 to position workpieces 700 of different lengths.

[0070] Please refer to Figure 1 and Figure 2The slide groove 110 is set at the top of the frame 100 and extends along the first direction. The vertical plate 500 is slidably connected to the slide groove 110. Specifically, the bottom of the vertical plate 500 can be connected to the slide groove 110 by setting bolts, but it is not limited to bolts. In this embodiment, bolt connection is adopted. When the position of the vertical plate 500 in the slide groove 110 needs to be adjusted, the bolts are loosened, and the bolts are tightened at the appropriate position to fix the vertical plate 500. Through the sliding connection between the vertical plate 500 and the slide groove 110, workpieces 700 of different lengths can be suitable. It should also be noted that the two vertical plates 500 at both ends of the length direction of the workpiece 700 can be slidably connected to the slide groove 110, or one of the vertical plates 500 can be fixed on the frame 100, and the other can be slidably connected to the slide groove 110. When detecting workpieces of different lengths When the temperature of the workpiece 700 is adjusted, it is only necessary to adjust the position of one vertical plate 500, which is convenient for adjustment. Generally, the vertical plate 500 close to the linear drive component 320 and one end of the temperature measuring probe 400 is fixed on the frame 100, and the vertical plate 500 away from the linear drive component 320 and one end of the temperature measuring probe 400 is slidably connected to the slide groove 110, so that the distance between the end of the workpiece 700 and the temperature measuring probe 400 can be fixed, which is convenient for the linear drive component 320 to drive the temperature measuring probe 400 to move toward the workpiece 700 and detect the temperature. In addition, the slide rail 610 away from one end of the temperature measuring probe 400 in the length direction of the workpiece 700 is also slidably connected to the slide groove 110, which is convenient for adjusting the position of the slide rail 610 according to the different lengths of the workpiece 700, so that the slider 600 and the slide rail 610 can better cooperate to position the workpiece 700.

[0071] In an embodiment of the present invention, the temperature measuring mechanism further includes a support leg 120 , which is disposed at the bottom of the rack 100 and is threadedly connected to the rack 100 to adjust the height of the rack 100 .

[0072] Please refer to Figure 1 and Figure 2 A support leg 120 is respectively provided at the four corners of the bottom of the rack 100, and the support leg 120 is bolted to the rack 100. When necessary, the rack 100 can be raised and adjusted to a suitable height for better use.

[0073] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A temperature measuring mechanism, characterized in that: include: A rack, used to place the workpiece to be temperature measured; A positioning assembly, disposed on the frame, and used for positioning the workpiece on the frame; A driving assembly, arranged on the frame; as well as The temperature measuring probe is connected to the driving assembly in a transmission manner so that the temperature measuring probe moves toward the workpiece and contacts the workpiece to detect the temperature of the workpiece.

2. The temperature measuring mechanism according to claim 1, characterized in that: A coating is provided on the outer periphery of the temperature measuring probe, and the material of the coating is Teflon.

3. The temperature measuring mechanism according to claim 1, characterized in that: The drive assembly comprises: A mounting frame, arranged on the frame; A linear drive component is disposed on the mounting frame, and the linear drive component is transmission-connected with the temperature measuring probe to drive the temperature measuring probe to move toward the workpiece.

4. The temperature measuring mechanism according to claim 3, characterized in that: The driving assembly also includes a mounting plate and an insulating plate. The linear driving member drives the mounting plate to move toward the workpiece. The insulating plate is mounted on one end of the mounting plate away from the linear driving member. The temperature measuring probe is mounted on the insulating plate.

5. The temperature measuring mechanism according to claim 1, characterized in that: The positioning component comprises: A telescopic member, comprising a fixed end and a telescopic end connected to the fixed end, wherein the fixed end is arranged on both sides of the frame; A push plate is transmission-connected with the telescopic end, and the telescopic end drives the push plate to move toward the workpiece to position the workpiece.

6. The temperature measuring mechanism according to claim 5, characterized in that: The push plate is provided with at least one through hole, the number of the through holes is consistent with the number of the temperature measuring probes, and the driving assembly drives the temperature measuring probe to move so that the temperature measuring probe passes through the through hole and contacts the workpiece.

7. The temperature measuring mechanism according to claim 5, characterized in that: The temperature measuring mechanism also includes a vertical plate, which is arranged on the top of the frame and is flush with the two ends of the workpiece in the length direction. The telescopic member drives the push plate to move along the first direction so that the push plate abuts against the vertical plate.

8. The temperature measuring mechanism according to claim 7, characterized in that: The temperature measuring mechanism also includes a slider and a slide rail, wherein the slide rail is disposed on the top of the frame and extends along the second direction, at least two sliders are provided, and one workpiece is provided between every two adjacent sliders, and the slider is slidably connected to the slide rail so that the distance between any two adjacent sliders is adjustable.

9. The temperature measuring mechanism according to claim 8, characterized in that: The frame is provided with a slide groove, which extends along the first direction. The vertical plate is slidably connected to the slide groove to position workpieces of different lengths.

10. The temperature measuring mechanism according to claim 1, characterized in that: The temperature measuring mechanism also includes a support foot, which is arranged at the bottom of the frame and is threadedly connected to the frame to adjust the height of the frame.

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