Electronic weighing instrument testing device
By designing an electronic scale testing device including a bracket, cylinder, image testing equipment and testing components, the problem of low accuracy of flatness testing of electronic scale pan in the prior art is solved, and more efficient and accurate flatness testing is achieved.
Patent Information
- Application Number
- CN202510001874.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-03-25
AI Technical Summary
The flatness test of the existing electronic weighing pan through the direct observation method. Although the test efficiency is high, the accuracy is low, which affects the weighing accuracy of the electronic weighing device.
An electronic scale testing device is designed, including a bracket, a cylinder, an image testing device, a test assembly and a drive motor. The test assembly is driven down by the cylinder, and the rotary frame and the transmission frame are driven by the drive motor. The two first markers draw ring marks on the marking barrel. The image testing equipment compares the marks and automatically determines the flatness of the surface of the weighing plate.
The accuracy of the flatness test of the electronic scale device is improved, the error of the manual observation method is avoided, and the accuracy of subsequent assembly of the scale plate and weighing data is ensured.
Smart Images
Figure CN119687836A_ABST
Abstract
Description
[0001] This application is a divisional application of the application filed on October 18, 2024, with application number 202411459647.0 and invention name “A high-efficiency testing device for the production of electronic scales”. Technical Field
[0002] The invention belongs to the technical field of electronic weighing instrument testing, in particular to an electronic weighing instrument testing device. Background Art
[0003] Electronic scales are a type of weighing and measuring equipment widely used in various industries. They use modern electronic technology for precise measurement. Electronic scales are mainly composed of a load-bearing system (scale pan, scale body), a force transmission conversion system (lever force transmission system, sensor) and a value indication system (such as a dial, electronic display instrument). At present, the scale pan of an electronic scale is made of materials such as stainless steel, plastic and glass. During the reproduction process of the existing stainless steel scale pan, its flatness needs to be tested to avoid subsequent installation failures. If it is not installed flat, it will affect the accuracy of the electronic scale weighing and cause the electronic scale to fail to meet regulations. The existing stainless steel scale pan flatness test is mostly conducted through direct observation. Although the direct observation method has high test efficiency, the test accuracy is low, which affects the subsequent composition of the electronic scale pan and the accuracy of the electronic scale weighing data. Therefore, an electronic scale test device is proposed. Summary of the invention
[0004] In order to solve the problems raised in the above background technology, the present invention provides an electronic scale testing device, which solves the problem that the flatness of the existing electronic scale pan is tested by direct observation. Although the direct observation method has high testing efficiency, the test accuracy is low, which affects the subsequent assembly of the electronic scale pan.
[0005] To achieve the above object, the present invention provides the following technical solution: an electronic scale testing device, comprising a bracket, a marking assembly, a supporting assembly and a driving motor, a cylinder is fixedly mounted on the top of the bracket, an image testing device is fixedly mounted on the bracket, and further comprising; A test assembly, wherein the test assembly is assembled at the output end of the cylinder, and the output end of the drive motor is connected to the top of the test assembly; The test assembly comprises a fixed frame fixed to the output end of the cylinder, a transmission frame is provided on the bottom movable sleeve of the fixed frame, a marking cylinder is provided on the outer movable sleeve of the transmission frame, and the marking cylinder is connected to the fixed frame through a second telescopic rod; The outer movable sleeve of the fixed frame is provided with a rotating frame, the inner wall of the rotating frame is provided with a gear, the top of the fixed frame is provided with a transmission gear meshing with the gear on the inner wall of the rotating frame, and the driving motor drives the transmission gear to rotate through a belt; A support rod is fixedly mounted at the bottom of the rotating frame, a transmission rod is sleeved inside the support rod, a vertical groove is opened on the surface of the support rod, a first marking pen movable in the vertical groove is fixedly mounted on the top of the transmission rod, and the writing end of the first marking pen is in conflict with the marking tube; A ball that moves along the scale plate of the electronic scale is arranged at the bottom of the transmission rod; The marker tube is made of a transparent material, an annular standard mark is arranged on the outside of the transmission frame, the annular standard mark is red in color, and the first marker pen is green in writing color.
[0006] Preferably, the support assembly comprises a sleeve installed at the bottom of the transmission frame, and a connecting rod is sleeved inside the sleeve; The testing assembly moves downward so that the bottom of the connecting rod contacts the top of the weighing pan.
[0007] Preferably, a push ring is fixedly mounted on the outside of the connecting rod, a guide column is connected to the outside of the sleeve, a docking rod is movably sleeved on the outside of the guide column, a spring sheet is connected between the docking rod and the sleeve, and a resisting sheet is arranged on the outer end of the docking rod; The docking rod is in a "J" shape, the opposite ends of the two docking rods are staggered, and the pushing ring is in a truncated cone shape.
[0008] Preferably, the bottom ends of the support rod are narrowed to form a cavity with a wide middle, a ball is provided in the middle of the transmission rod, and the abutment sheet is located inside the support rod; In the initial state, the abutment sheet abuts against the ball under the action of the spring sheet, the push ring moves upward to push the two docking rods to move relative to each other, the abutment sheet breaks away from contact with the ball, and the ball at the bottom of the transmission rod contacts the top of the scale pan.
[0009] Preferably, the marking assembly includes a fixed rod fixed to the outside of the support rod, a movable groove is opened in the middle of the transmission rod, a fixed column is fixed inside the movable groove, a pushing rod is hinged on the fixed rod, a rectangular groove is opened at one end of the pushing rod, and the fixed column is located in the rectangular groove.
[0010] Preferably, the other end of the push rod is hinged with a round rod, the other end of the round rod is connected to a guide rod by a ball shaft, a stabilizing frame is fixedly mounted on the outside of the support rod, the guide rod is movably sleeved in the stabilizing frame, and a first telescopic rod is fixedly mounted on the bottom of the guide rod; The height difference between the first telescopic rod and the ball is between 1-1.5 mm; The push rod is arranged with the fixing rod as the central axis and the fixing column, and the length of one end thereof is smaller than the other end.
[0011] Preferably, the stabilizing frame, the guide rod and the first telescopic rod are each provided with two, and the round rod is connected to the ball shaft of one of the guide rods; The support rod is hinged with a connecting ring on the outside, and the connecting ring is connected to two guide rods through two first telescopic rods, and the first telescopic rods are connected to the connecting spherical shaft, and the two first telescopic rods are different in color.
[0012] Preferably, the test assembly further comprises a guide frame fixedly mounted on the inner wall of the marker tube, the outside of the transmission frame is movably connected with a slider via a shaft, and the slider is slidably engaged with the outside of the guide frame; The guide frame has a cross section in a "Z" shape.
[0013] Preferably, two wiping cottons are fixedly mounted on the outside of the support rod, and the first marking pen is located between the two wiping cottons; In an initial state, the sliding block is located in the bottom area of the guide frame, and the first marking pen is in contact with the outer upper end of the marking tube.
[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention rotates a semicircle along the top of the scale pan by rotating the rotating frame, the support rod and the transmission rod, and the two first marking pens rotate to draw circular ring marks on the marking tube. If the surface of the scale pan is concave or convex, the line drawn by the first marking pen on the marking tube will appear concave or convex. After the test component rotates half a circle, the image testing device compares the circular ring mark drawn on the marking tube with the standard mark on the transmission frame. If the image processing result appears red or green, it means that the surface of the scale pan has a concave or convex phenomenon. If the processing result is only yellow, it means that the surface of the scale pan is flat, thereby avoiding the manual use of direct observation method to affect the result of the flatness test of the electronic scale pan, improving the accuracy of the flatness test of the electronic scale, facilitating the subsequent composition of the scale pan, and ensuring the accuracy of the weighing data at the same time; The present invention tests that when a bulge appears on the scale pan during the rotation of the test assembly along the scale pan, the transmission rod moves upward, and pushes one end of the push rod upward through the fixed column, the push rod rotates with the fixed rod as the central axis, and pushes the guide rod and the first telescopic rod downward through the round rod to contact the top of the scale pan, and marks are made on the scale pan through the first telescopic rod, and when a depression appears on the surface of the scale pan, the transmission rod moves downward to drive the push rod to rotate and pull one of the guide rods and the first telescopic rod upward, and one of the guide rods moves upward, and drives the connecting ring to rotate through one of the first telescopic rods, thereby pushing the other guide rod and the first telescopic rod downward, and the other first telescopic rod is marked on the scale pan, so that the bulge and depression on the scale pan can be observed easily, and the subsequent processing of unqualified scale pans is convenient; The present invention uses two first marking pens to draw flatness lines on the top surface of the weighing pan on the outside of the marking barrel, and the driving motor continuously drives the rotating frame and the transmission frame to rotate. At this time, the slider slides to the high end area of the guide frame, thereby driving the marking barrel to move up along the transmission frame. The first marking pen contacts the lower end of the outside of the marking barrel, and at the same time, the annular mark on the upper end is kept horizontal with the upper wiping cotton. The annular mark on the upper end is wiped during the rotation of the wiping cotton, so that it can be recycled. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 It is a schematic diagram of the appearance structure of the test component and the marking component of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the test assembly of the present invention; Figure 4 This is a schematic diagram of the appearance structure of the marking component of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the marking component of the present invention; Figure 6 This is a schematic diagram of the internal structure of the marking component of the present invention; Figure 7 It is a schematic diagram of the enlarged structure of position B in the image testing device of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the test assembly of the present invention; Fig. 9 For the present invention Figure 8 The enlarged structural diagram at A in the middle; Fig.10 For the present invention Figure 8 The enlarged structural diagram at C in the middle; Fig.11 It is a schematic diagram of the cross-sectional structure of the support assembly of the present invention.
[0016] In the figure: 1. bracket; 2. driving motor; 3. cylinder; 5. test assembly; 51. fixed frame; 511. rotating frame; 512. support rod; 513. first marking pen; 514. transmission rod; 515. wiping cotton; 516. vertical groove; 52. transmission gear; 53. transmission frame; 54. marking tube; 55. guide frame; 56. slider; 57. second telescopic rod; 6. image testing equipment; 7. marking assembly; 71. fixed rod; 72. pushing rod; 73. round rod; 74. connecting ring; 75. guide rod; 76. first telescopic rod; 78. stabilizing frame; 79. movable groove; 70. fixed column; 8. supporting assembly; 81. connecting rod; 82. pushing ring; 83. docking rod; 84. spring; 85. guide column; 86. resistance piece; 87. sleeve. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] like Figures 1 to 11 As shown, the present invention provides an electronic weighing instrument testing device, including a bracket 1, a marking component 7, a supporting component 8 and a driving motor 2, a cylinder 3 is fixedly mounted on the top of the bracket 1, an image testing device 6 is fixedly mounted on the bracket 1, and further includes; A test assembly 5, which is assembled at the output end of the cylinder 3, and the output end of the driving motor 2 is connected to the top of the test assembly 5; The test assembly 5 includes a fixed frame 51 fixed to the output end of the cylinder 3, a transmission frame 53 is provided on the bottom of the fixed frame 51, a marking cylinder 54 is provided on the outer movable sleeve of the transmission frame 53, and the marking cylinder 54 is connected to the fixed frame 51 through a second telescopic rod 57; The outer movable sleeve of the fixed frame 51 is provided with a rotating frame 511, the inner wall of the rotating frame 511 is provided with a gear, and the top of the fixed frame 51 is provided with a transmission gear 52 meshing with the gear on the inner wall of the rotating frame 511, and the driving motor 2 drives the transmission gear 52 to rotate through a belt; A support rod 512 is fixedly mounted at the bottom of the rotating frame 511, a transmission rod 514 is sleeved inside the support rod 512, a vertical groove 516 is opened on the surface of the support rod 512, a first marking pen 513 movable in the vertical groove 516 is fixedly mounted on the top of the transmission rod 514, and the writing end of the first marking pen 513 is in conflict with the marking tube 54; The bottom of the transmission rod 514 is provided with a ball that moves along the scale plate of the electronic scale; The marking tube 54 is made of a transparent material. An annular standard mark is set on the outside of the transmission frame 53. The annular standard mark is red in color. The first marking pen 513 is green in writing color. The annular standard mark and the first marking pen 513 are kept level with the image testing device 6.
[0019] The electronic scale pan is placed at the bottom of the test assembly 5, and the cylinder 3 pushes the test assembly 5 downward, and contacts the top of the scale pan through the support assembly 8. At this time, the ball at the bottom of the transmission rod 514 contacts the scale pan, and the transmission gear 52 is driven to rotate by the drive motor 2, so that the rotating frame 511, the support rod 512 and the transmission rod 514 rotate along the top of the scale pan in a semicircle. Since the first marking pen 513 contacts the outer periphery of the marking cylinder 54, the two first marking pens 513 rotate to draw a circular mark on the marking cylinder 54. During the rotation of the ball at the bottom of the transmission rod 514 along the top of the scale pan, if the surface of the scale pan appears concave or convex, it will push the transmission rod 514 and the first marking pen 513 to move down or up. At the same time, the line drawn by the first marker pen 513 on the marker cylinder 54 will appear concave or convex. After the test component 5 rotates half a circle, and because the first marker pen 513 and the annular standard mark remain horizontal, the image testing device 6 compares the annular mark drawn on the marker cylinder 54 with the standard mark on the transmission frame 53. If the processing result is red or green, it means that the surface of the scale plate has a concave or convex phenomenon. If the processing result is only yellow, it means that the surface of the scale plate is flat, avoiding the manual direct observation method to affect the result of the flatness test of the electronic scale plate, improving the accuracy of the flatness test of the electronic scale, facilitating the subsequent composition of the scale plate, and ensuring the accuracy of the weighing data; At the same time, since the shape of the weighing pan is circular or rectangular, the flatness of the circular weighing pan can be tested by rotating the two transmission rods 514 along the top of the weighing pan. In the case of a rectangular weighing pan, the transmission rods 514 can pass through the four corners of the rectangular weighing pan during rotation, thereby ensuring that the test result of the weighing pan is more accurate.
[0020] like Figure 2 , Figure 8 , Fig.10 and Fig.11 As shown, the support assembly 8 includes a sleeve 87 installed at the bottom of the transmission frame 53, and a connecting rod 81 is sleeved inside the sleeve 87; The test assembly 5 moves down so that the bottom of the connecting rod 81 contacts the top of the scale pan; A push ring 82 is fixedly mounted on the outside of the connecting rod 81, a guide column 85 is connected to the outside of the sleeve 87, a docking rod 83 is movably sleeved on the outside of the guide column 85, a spring piece 84 is connected between the docking rod 83 and the sleeve 87, and a resisting piece 86 is arranged at the outer end of the docking rod 83; The docking rod 83 is in a "J" shape, the opposite ends of the two docking rods 83 are staggered, and the pushing ring 82 is in a truncated cone shape; The bottom ends of the support rod 512 are narrowed and the middle is wide. A ball is provided in the middle of the transmission rod 514. The abutment sheet 86 is located inside the support rod 512. In the initial state, the abutment sheet 86 abuts against the ball under the action of the spring sheet 84, and the push ring 82 moves upward to push the two docking rods 83 to move in an offset manner, so that the abutment sheet 86 is out of contact with the ball, and the ball at the bottom of the transmission rod 514 contacts the top of the scale pan.
[0021] The weighing pan is placed at the bottom of the test assembly 5, and the test assembly 5 is pushed downward by the cylinder 3. The connecting rod 81 moves downward and contacts the top of the weighing pan first, increasing the stability of the weighing pan. The test assembly 5 continues to move downward, and the connecting rod 81 gradually shrinks into the sleeve 87. At the same time, the two docking rods 83 on the pushing ring 82 are pushed to move relative to each other, and the spring piece 84 is stretched to make the contact piece 86 break away from the contact with the ball. At this time, the bottom ball of the transmission rod 514 contacts the top of the weighing pan, and the test assembly 5 can be driven by the driving motor 2 to rotate to test the flatness of the weighing pan.
[0022] like Figure 4-Figure 8 As shown, the marking assembly 7 includes a fixed rod 71 fixedly mounted on the outside of the support rod 512, a movable groove 79 is opened in the middle of the transmission rod 514, a fixed column 70 is fixed inside the movable groove 79, a push rod 72 is hinged on the fixed rod 71, a rectangular groove is opened at one end of the push rod 72, and the fixed column 70 is located in the rectangular groove; The other end of the push rod 72 is hinged with a round rod 73, and the other end of the round rod 73 is connected to a guide rod 75 through a ball shaft. A stabilizing frame 78 is fixedly mounted on the outside of the support rod 512, and the guide rod 75 is movably sleeved in the stabilizing frame 78. A first telescopic rod 76 is fixedly mounted at the bottom of the guide rod 75. The height difference between the first telescopic rod 76 and the ball is between 1-1.5 mm; The push rod 72 is mounted on the fixed column 70 with the fixed rod 71 as the central axis, and the length of one end is shorter than the other end; There are two stabilizing frames 78, two guide rods 75 and two first telescopic rods 76, and the round rod 73 is connected to a ball shaft of one of the guide rods 75; The support rod 512 is externally hinged with a connecting ring 74 , which is connected to two guide rods 75 via two first telescopic rods 76 , which are ball-axled to the connecting ring 74 , and the two first telescopic rods 76 are different in color.
[0023] The bottom ball of the transmission rod 514 is moved downward by the test component 5 to contact the top of the scale pan, and the test component 5 is driven to rotate along the scale pan by the driving motor 2. When a bulge appears on the scale pan during the rotation, the transmission rod 514 is moved upward, and one end of the push rod 72 is pushed upward by the fixed column 70. The push rod 72 rotates with the fixed rod 71 as the central axis, and the guide rod 75 and the first telescopic rod 76 are pushed downward by the round rod 73 to contact the top of the scale pan, and a mark is made on the scale pan by the first telescopic rod 76, so that the bulge on the scale pan can be observed easily. Since the length of one end of the push rod 72 is smaller than the length of the other end, the push rod 72 rotates under the action of the fixed column 70, which can increase the rotation arc of the other end of the push rod 72, thereby increasing the downward movement distance of the first telescopic rod 76, ensuring that the first telescopic rod 76 can contact the scale pan when it moves downward; When a depression appears on the surface of the weighing pan, the transmission rod 514 moves downward under the action of its own gravity, driving the push rod 72 to rotate and pull one of the guide rods 75 and the first telescopic rod 76 upward, and one of the guide rods 75 moves upward, driving the connecting ring 74 to rotate through one of the first telescopic rods 76, thereby pushing the other guide rod 75 and the first telescopic rod 76 downward, and the other first telescopic rod 76 is marked on the weighing pan to facilitate the subsequent processing of the unqualified weighing pan.
[0024] like Figure 2 , Figure 5 and Figure 8 As shown, the test assembly 5 further includes a guide frame 55 fixed to the inner wall of the marker tube 54, and the outer portion of the transmission frame 53 is movably connected to a slider 56 via an axis, and the slider 56 is slidably engaged with the outer portion of the guide frame 55; The guide frame 55 has a "Z"-shaped cross section; Two wiping cottons 515 are fixedly mounted on the outside of the support rod 512, and the first marking pen 513 is located between the two wiping cottons 515; In the initial state, the slider 56 is located at the bottom area of the guide frame 55 , and the first marking pen 513 is in contact with the outer upper end of the marking tube 54 .
[0025] The driving motor 2 drives the rotating frame 511 and the transmission frame 53 to rotate half a circle, and the two first marking pens 513 draw flatness lines on the top surface of the weighing pan on the outside of the marking cylinder 54, and the driving motor 2 continues to drive the rotating frame 511 and the transmission frame 53 to rotate. At this time, the slider 56 slides to the high end area of the guide frame 55, thereby driving the marking cylinder 54 to move up along the transmission frame 53, and the first marking pen 513 contacts the lower end of the outside of the marking cylinder 54. At the same time, the annular mark on the upper end is kept level with the upper wiping cotton 515. The annular mark on the upper end is wiped during the rotation of the wiping cotton 515, so that it can be recycled.
[0026] The working principle and use process of the present invention: The weighing pan is placed at the bottom of the test assembly 5. The test assembly 5 is pushed downward by the cylinder 3. The connecting rod 81 moves downward and contacts the top of the weighing pan first, increasing the stability of the weighing pan. The test assembly 5 continues to move downward, and the connecting rod 81 gradually shrinks into the sleeve 87. At the same time, the two docking rods 83 on the push ring 82 are pushed to move in an offset manner, and the spring sheet 84 is stretched to make the contact sheet 86 separate from the contact with the ball. At this time, the bottom ball of the transmission rod 514 contacts the top of the weighing pan. The driving motor 2 drives the transmission gear 52 to rotate, so that the rotating frame 511, the support rod 512 and the transmission rod 514 rotate along the top of the scale pan in a semicircle. Since the first marker pen 513 is in contact with the outer periphery of the marker tube 54, the two first marker pens 513 rotate to draw a circular ring mark on the marker tube 54. During the rotation of the ball at the bottom of the transmission rod 514 along the top of the scale pan, if the scale pan surface is concave or convex, the transmission rod 514 and the first marker pen 513 will be pushed down or up, and the line drawn by the first marker pen 513 on the marker tube 54 will appear concave or convex. After the test component 5 rotates half a circle, and since the first marker pen 513 and the annular standard mark remain horizontal, the image testing device 6 compares the circular ring mark drawn on the marker tube 54 with the standard mark on the transmission frame 53. If the processing result is red or green, it means that the scale pan surface has a concave or convex phenomenon. If the processing result is only yellow, it means that the scale pan surface is flat. The bottom ball of the transmission rod 514 is moved downward by the test component 5 to contact the top of the scale pan, and the test component 5 is driven to rotate along the scale pan by the driving motor 2. When a bulge appears on the scale pan during the rotation, the transmission rod 514 is moved upward, and one end of the push rod 72 is pushed upward by the fixed column 70. The push rod 72 rotates with the fixed rod 71 as the central axis, and the guide rod 75 and the first telescopic rod 76 are pushed downward by the round rod 73 to contact the top of the scale pan, and a mark is made on the scale pan by the first telescopic rod 76, so that the bulge on the scale pan can be observed easily. Since the length of one end of the push rod 72 is smaller than the length of the other end, the push rod 72 rotates under the action of the fixed column 70, which can increase the rotation arc of the other end of the push rod 72, thereby increasing the downward movement distance of the first telescopic rod 76, ensuring that the first telescopic rod 76 can contact the scale pan when it moves downward; When the surface of the scale pan is concave, the transmission rod 514 moves downward under the action of its own gravity, driving the push rod 72 to rotate and pull one of the guide rods 75 and the first telescopic rod 76 upward, and one of the guide rods 75 moves upward, driving the connecting ring 74 to rotate through one of the first telescopic rods 76, thereby pushing the other guide rod 75 and the first telescopic rod 76 downward, and the other first telescopic rod 76 marks on the scale pan; The driving motor 2 drives the rotating frame 511 and the transmission frame 53 to rotate half a circle, and the two first marking pens 513 draw flatness lines on the top surface of the weighing pan on the outside of the marking cylinder 54, and the driving motor 2 continues to drive the rotating frame 511 and the transmission frame 53 to rotate. At this time, the slider 56 slides to the high end area of the guide frame 55, thereby driving the marking cylinder 54 to move up along the transmission frame 53, and the first marking pen 513 contacts the lower end of the outside of the marking cylinder 54. At the same time, the annular mark on the upper end is kept level with the upper wiping cotton 515, and the annular mark on the upper end is wiped during the rotation of the wiping cotton 515.
[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An electronic weighing instrument testing device, comprising a bracket (1), a marking assembly (7), a supporting assembly (8) and a driving motor (2), wherein a cylinder (3) is fixedly mounted on the top of the bracket (1), and an image testing device (6) is fixedly mounted on the bracket (1), characterized in that: Also includes; A test assembly (5), the test assembly (5) being mounted on the output end of the cylinder (3), and the output end of the drive motor (2) being connected to the top of the test assembly (5); The test assembly (5) comprises a fixed frame (51) fixedly mounted on the output end of the cylinder (3); a transmission frame (53) is provided on the bottom movable sleeve of the fixed frame (51); a marking cylinder (54) is provided on the outer movable sleeve of the transmission frame (53); and the marking cylinder (54) is connected to the fixed frame (51) via a second telescopic rod (57); The outer movable sleeve of the fixed frame (51) is provided with a rotating frame (511), the inner wall of the rotating frame (511) is provided with a gear, the top of the fixed frame (51) is provided with a transmission gear (52) meshing with the gear on the inner wall of the rotating frame (511), and the driving motor (2) drives the transmission gear (52) to rotate via a belt; A support rod (512) is fixedly mounted at the bottom of the rotating frame (511), a transmission rod (514) is sleeved inside the support rod (512), a vertical groove (516) is formed on the surface of the support rod (512), a first marking pen (513) movable in the vertical groove (516) is fixedly mounted on the top of the transmission rod (514), and a writing end of the first marking pen (513) contacts the marking tube (54); A ball bearing that moves along the scale plate of the electronic scale is arranged at the bottom of the transmission rod (514); The marking tube (54) is made of a transparent material, an annular standard mark is arranged on the outside of the transmission frame (53), the annular standard mark is red in color, and the first marking pen (513) is green in writing color; The support assembly (8) comprises a sleeve (87) mounted on the bottom of the transmission frame (53), and a connecting rod (81) is sleeved inside the sleeve (87); The testing component (5) moves downward so that the bottom of the connecting rod (81) contacts the top of the scale pan; The connecting rod (81) is fixedly provided with a push ring (82) on its exterior, the sleeve (87) is connected with a guide column (85) on its exterior, a docking rod (83) is movably sleeved on the exterior of the guide column (85), a spring sheet (84) is connected between the docking rod (83) and the sleeve (87), and a resisting sheet (86) is provided at the outer end of the docking rod (83); The docking rod (83) is in a "J" shape, the opposite ends of the two docking rods (83) are arranged in a staggered manner, and the pushing ring (82) is in a truncated cone shape; The marking assembly (7) comprises a fixed rod (71) fixedly mounted on the outside of the support rod (512); a movable groove (79) is provided in the middle of the transmission rod (514); a fixed column (70) is fixedly mounted inside the movable groove (79); a push rod (72) is hingedly connected to the fixed rod (71); a rectangular groove is provided at one end of the push rod (72); and the fixed column (70) is located in the rectangular groove; The other end of the push rod (72) is hingedly connected to a round rod (73), the other end of the round rod (73) is connected to a guide rod (75) through a ball shaft, a stabilizing frame (78) is fixedly mounted on the outside of the support rod (512), the guide rod (75) is movably sleeved in the stabilizing frame (78), and a first telescopic rod (76) is fixedly mounted on the bottom of the guide rod (75); The height difference between the first telescopic rod (76) and the ball is between 1 and 1.5 mm; The push rod (72) is sleeved on one end of the fixed column (70) with the fixed rod (71) as the central axis, and the length of the other end is smaller than that of the other end.
2. The electronic weighing instrument testing device according to claim 1, characterized in that: The bottom of the support rod (512) is a cavity that is narrowed at both ends and wide in the middle. A round ball is provided in the middle of the transmission rod (514). The abutment sheet (86) is located inside the support rod (512). In the initial state, the abutment sheet (86) abuts against the ball under the action of the spring sheet (84), the push ring (82) moves upward to push the two docking rods (83) to move in an offset manner, the abutment sheet (86) is separated from the contact with the ball, and the ball at the bottom of the transmission rod (514) contacts the top of the scale pan.
3. The electronic weighing instrument testing device according to claim 1, characterized in that: The stabilizing frame (78), the guide rod (75) and the first telescopic rod (76) are each provided with two, and the round rod (73) is connected to a ball shaft of one of the guide rods (75); The support rod (512) is hingedly connected to a connecting ring (74) on the outside. The connecting ring (74) is connected to two guide rods (75) via two first telescopic rods (76). The first telescopic rods (76) are ball-axled connected to the connecting ring (74). The two first telescopic rods (76) are of different colors.
4. The electronic weighing instrument testing device according to claim 1, characterized in that: The test assembly (5) further comprises a guide frame (55) fixedly mounted on the inner wall of the marker tube (54); the outside of the transmission frame (53) is movably connected to a slider (56) via a shaft, and the slider (56) is slidably engaged with the outside of the guide frame (55); The guide frame (55) has a "Z"-shaped cross section.
5. The electronic weighing instrument testing device according to claim 4, characterized in that: Two wiping cottons (515) are fixedly mounted on the outside of the support rod (512), and the first marking pen (513) is located between the two wiping cottons (515); In an initial state, the slider (56) is located in the bottom area of the guide frame (55), and the first marking pen (513) is in contact with the outer upper end of the marking tube (54).