Electronic measuring device and tire balancing machine

Abstract

The invention relates to the technical field of electronic measurement, and discloses an electronic measuring device and a tire balancing machine. The measuring rod is arranged on the support in a penetrating mode, the measuring rod is movably connected with the penetrating position, and an inner cavity is formed in the measuring rod; the baffle plate is arranged at one end, far away from the bracket, of the measuring rod; and the elastic piece is sleeved on the outer surface wall, between the bracket and the baffle plate, of the measuring rod. The use of the cleaning roller is combined with the dual effects of gas sprayed out of the nozzles and the flexible bristles, efficient cleaning of the inner side wall of the hub is achieved, the gas sprayed out of the nozzles not only drives the cleaning roller to rotate, but also directly performs soot blowing treatment on the inner side of the hub, most dust and impurities are removed, and the service life of the hub is prolonged. The inner side of the hub is further cleaned carefully through the flexible bristles, the hub is prevented from being scratched at the same time, the high-efficiency cleaning and protection mechanism ensures that the measuring head is tightly attached to the inner side wall of the hub, and therefore the measuring precision and reliability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic measurement, and in particular to an electronic measuring device and a tire balancing machine. Background Art

[0002] Electronic measuring devices are high-precision measuring devices or systems based on analog circuit technology and digital circuit technology, and cover signal processing technology, communication technology, software technology, bus technology and other multidisciplinary integration. They are mainly used to monitor, measure and calculate various physical parameters and components, and have functions such as detection and measurement, signal transmission and data processing. In tire balancing machines, electronic measuring devices play a core role, providing accurate basis for subsequent balance adjustments by measuring various parameters of tires with high precision.

[0003] After searching, a Chinese patent with announcement number CN106017801B discloses an electronic measuring device and a tire balancing machine; the electronic measuring device is used in the tire balancing machine, including a bracket for fixing in the tire balancing machine, a measuring rod inserted in the bracket, and a handle fixedly connected to the end of the measuring rod; the electronic measuring device also includes a photoelectric sensor arranged on the bracket; the side wall of the measuring rod is axially provided with a plurality of evenly spaced first grooves; the photoelectric sensor is opposite to the side wall provided with the first grooves; wherein, when the measuring rod is pulled out of the tire balancing machine by the handle, the photoelectric sensor emits a light signal and obtains the number of the first grooves of the feedback reflection signal, thereby measuring the axial displacement of the measuring rod. The technical solution of the present invention improves the measurement accuracy of the tire parameters of the tire balancing machine, but the solution still has the following deficiencies when actually used: The integrated photoelectric sensor and angle sensor technology can measure the tiny gap between the tire and the balancing machine with high accuracy. However, the accuracy of this process is easily interfered by external factors, especially in some unprofessional or poorly maintained street tire shops. These shops may fail to strictly implement the pretreatment steps of wheel cleaning, resulting in the accumulation of dust, dirt and other impurities on the inner wall of the wheel. These attachments will not only affect the direct contact between the measuring rod and the wheel surface, but may also introduce unnecessary measurement errors by changing the reflection path of light or interfering with the angle reading of the sensor. This deviation poses a hidden danger in the data collection stage, and will then directly affect the dynamic balance adjustment plan calculated by the tire balancer based on these data, greatly reducing the final dynamic balance effect, and may cause vibration, increased noise and abnormal tire wear during vehicle driving, seriously affecting driving comfort and safety.

[0004] Therefore, it is necessary to design an electronic measuring device and a tire balancing machine to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an electronic measuring device and a tire balancing machine.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An electronic measuring device comprising: Bracket; A measuring rod is arranged through the bracket and is movably connected to the through-hole, and an inner cavity is provided inside the measuring rod; A baffle, arranged at one end of the measuring rod away from the bracket; An elastic member, which is sleeved on the outer wall of the measuring rod between the bracket and the baffle; A length measuring structure, arranged on the bracket; An angle measuring structure is arranged on the bracket, and the angle measuring structure is used in conjunction with the length measuring structure to measure the extended length of the measuring rod; A handle, fixedly mounted on an end of the measuring rod away from the baffle; A measuring head, arranged at one end of the handle away from the measuring rod; An air guide assembly is arranged inside the measuring rod; A fixing frame, fixedly mounted on the inner bottom wall of the bracket; A toggle assembly is disposed between the bracket and the side surfaces opposite to the fixing frame; A cleaning assembly is arranged at an end of the measuring head away from the handle.

[0007] As a preferred technical solution of the present invention, the air guide component includes: A through opening is provided on the outer wall of the measuring rod; A fixing plate fixedly mounted on the inner side wall of one end of the through opening; A sealing cylinder, fixedly mounted on the side of the fixing plate and located on the inner side of the through opening; A piston plate, slidably mounted on the inner wall of the sealing cylinder; A push rod is fixedly mounted on the side of the piston plate, and one end of the push rod away from the piston plate passes through the sealing cylinder; A push plate, fixedly mounted on one end of the push rod located outside the sealing cylinder; An air inlet pipe is arranged on a side of the fixing plate and is communicated with the sealing cylinder; A conduit is arranged on a side of the fixing plate and is communicated with the sealing cylinder; The spring one is sleeved on the outer wall of the push rod located on the inner side of the sealing cylinder, and the two ends of the spring one are respectively fixedly connected to the push rod and the sealing cylinder.

[0008] As a preferred technical solution of the present invention, one-way valves with opposite flow directions are installed inside the conduit and the air inlet pipe, and the diameter of the push plate is at least smaller than the inner diameter of the inner cavity.

[0009] As a preferred technical solution of the present invention, the toggle assembly includes: A rotating shaft, rotatably mounted between the fixing frame and the side surfaces opposite to the bracket; A connecting plate, fixedly sleeved on one end of the rotating shaft; A top plate, slidably mounted on the inner side wall of the connecting plate; Spring 2, fixedly mounted between the bottom surface of the top plate and the inner bottom wall of the connecting plate; The transmission mechanism is arranged on the measuring rod and the rotating shaft.

[0010] As a preferred technical solution of the present invention, the transmission mechanism includes: A support sleeve is rotatably mounted on the inner side wall of the bracket, and the support sleeve is coaxially arranged with the measuring rod; A driving half gear is fixedly mounted on an end of the support sleeve away from the bracket; A transmission gear is sleeved on the outer wall of the rotating shaft, and the transmission gear is meshed with the driving half gear; A slide groove is provided on the outer wall of the measuring rod; A sliding block is fixedly mounted on the inner side wall of the driving half gear, and the sliding block is slidably connected to the sliding groove.

[0011] As a preferred technical solution of the present invention, the top end of the top plate is symmetrically provided with inclined surfaces, and the top plate is located directly below the measuring rod.

[0012] As a preferred technical solution of the present invention, the cleaning component comprises: A rotary joint is rotatably mounted on an end of the measuring head away from the handle, and an end of the conduit away from the sealing cylinder is connected to the rotary joint; A cleaning roller, fixedly mounted on an end of the rotary joint away from the measuring head; An air guide cavity is provided inside the cleaning roller, and the air guide cavity is communicated with the rotary joint; A plurality of nozzles are distributed in a ring array and are arranged on the outer wall of the cleaning roller, and the nozzles are connected to the air guide cavity; The cleaning mechanism is arranged on the outer surface wall of the cleaning roller.

[0013] As a preferred technical solution of the present invention, the cleaning mechanism comprises: A plurality of guide grooves are distributed in a ring array and are arranged on the outer wall of the cleaning roller; A plurality of guide rods are slidably mounted on the inner side walls of the plurality of guide grooves; A plurality of cleaning plates are respectively fixedly mounted on one end of a plurality of guide rods located outside the guide groove.

[0014] As a preferred technical solution of the present invention, the nozzle is arranged obliquely compared to the radial direction of the cleaning roller, and the outer wall of the cleaning plate is provided with flexible bristles.

[0015] A tire balancing machine comprises a balancing body, a driving shaft is arranged on the side of the balancing body, and a bracket and a baffle are fixedly installed inside the balancing body.

[0016] The present invention has the following beneficial effects: 1. By setting the measuring rod and the air guide assembly, when the measuring rod is pulled out and slides to a specific position, the interaction between the top plate and the push plate, and the sliding of the piston plate in the sealing cylinder, automatically forms a negative pressure and guides the air into the sealing cylinder through the air inlet pipe, which not only simplifies the operation process, but also ensures the immediate supply of the gas required for cleaning during the measurement process. Subsequently, when the measuring head approaches the inner side of the wheel hub, the gas in the sealing cylinder is ejected through the conduit and the nozzle to blow away the dust on the inner side of the wheel hub, effectively removing dust and impurities that may affect the measurement accuracy, thereby improving the measurement accuracy; 2. By setting the fixing frame and the toggle assembly, the handle is not only used to control the extension and retraction of the measuring rod, but also realizes the control of the air guide assembly through the cooperation of the slide groove and the slider, and the meshing of the driving half gear and the transmission gear. The air guide assembly can be flexibly opened to ensure that it can accurately clean the inside of the wheel hub when needed. At the same time, by turning the handle in the opposite direction, the measuring rod and the cleaning roller can be easily reset to prepare for the next measurement; 3. By setting up the measuring head and the cleaning assembly, the use of the cleaning roller combines the dual effects of the gas ejected from the nozzle and the flexible bristles to achieve efficient cleaning of the inner wall of the wheel hub. The gas ejected from the nozzle not only drives the rotation of the cleaning roller, but also directly blows the inner side of the wheel hub to remove most of the dust and impurities, while the flexible bristles further clean the inner side of the wheel hub in detail, while avoiding the risk of scratching the wheel hub. This efficient cleaning and protection mechanism ensures a close fit between the measuring head and the inner wall of the wheel hub, thereby improving the measurement accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of an electronic measuring device proposed by the present invention; Figure 2A three-dimensional multi-angle structural schematic diagram of an electronic measuring device proposed by the present invention; Figure 3 A schematic diagram of a three-dimensional partial cross-sectional structure of an electronic measuring device proposed by the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A; Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure at B; Figure 6 For the present invention Figure 1 A schematic diagram of the enlarged structure at C; Figure 7 A schematic diagram of the handle structure of an electronic measuring device proposed by the present invention; Figure 8 A schematic diagram of a partial cross-section structure of a cleaning roller of an electronic measuring device proposed by the present invention; Fig. 9 The figure is a schematic diagram of the three-dimensional structure of a tire balancing machine proposed by the present invention.

[0018] In the figure: 1, bracket; 2, measuring rod; 3, baffle; 4, elastic member; 5, length measuring structure; 6, angle measuring structure; 7, handle; 8, measuring head; 91, through port; 92, fixing plate; 93, sealing cylinder; 94, piston plate; 95, push rod; 96, push plate; 97, air intake pipe; 98, guide tube; 99, spring one; 10, fixing frame; 111, rotating shaft; 112, connecting plate; 113, top plate; 114, spring two; 115, supporting sleeve; 116, driving half gear; 117, transmission gear; 118, slide groove; 119, slide block; 121, rotary joint; 122, cleaning roller; 123, air guide cavity; 124, nozzle; 125, guide groove; 126, guide rod; 127, cleaning plate; 13, balancing body; 14, driving shaft. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-9An electronic measuring device includes a bracket 1; a measuring rod 2, which is arranged on the bracket 1 and is movably connected to the penetration point, and an inner cavity is opened inside the measuring rod 2; a baffle 3, which is arranged at the end of the measuring rod 2 away from the bracket 1; an elastic member 4, which is sleeved on the outer wall of the measuring rod 2 between the bracket 1 and the baffle 3; a length measuring structure 5, which is arranged on the bracket 1; an angle measuring structure 6, which is arranged on the bracket 1, and the angle measuring structure 6 is used in conjunction with the length measuring structure 5 to measure the extended length of the measuring rod 2; a handle 7, which is fixedly installed on the end of the measuring rod 2 away from the baffle 3; a measuring head 8, which is arranged at the end of the handle 7 away from the measuring rod 2 ; An air guide component is arranged on the inner side of the measuring rod 2; a fixing frame 10 is fixedly installed on the inner bottom wall of the bracket 1; a toggle component is arranged between the bracket 1 and the opposite sides of the fixing frame 10; a cleaning component is arranged at the end of the measuring head 8 away from the handle 7; when measuring, the measuring rod 2 can be pulled so that the measuring rod 2 extends out of the balancing machine along the bracket 1, and when the handle 7 is moved to the inner measuring position of the wheel hub, the handle 7 can be rotated so that the measuring head 8 fits with the inner wall of the wheel hub, and the distance between the wheel hub and the balancing machine can be accurately measured through the cooperation of the length measuring structure 5 and the angle measuring structure 6, and the tire can be balanced by the balancing machine after the measurement is completed.

[0021] Reference Figure 2 , Figure 3 , Figure 4The air guide assembly includes: a through port 91, which is opened on the outer wall of the measuring rod 2; a fixed plate 92, which is fixedly mounted on the inner wall of one end of the through port 91; a sealing cylinder 93, which is fixedly mounted on the side of the fixed plate 92 and located on the inner side of the through port 91; a piston plate 94, which is slidably mounted on the inner wall of the sealing cylinder 93; a push rod 95, which is fixedly mounted on the side of the piston plate 94, and the end of the push rod 95 away from the piston plate 94 passes through the sealing cylinder 93; a push plate 96, which is fixedly mounted on the end of the push rod 95 located on the outer side of the sealing cylinder 93, and the push plate 96 is fixedly mounted on the end of the push rod 95 located on the outer side of the sealing cylinder 93. The diameter of the plate 96 is at least smaller than the inner diameter of the inner cavity; the air inlet pipe 97 is arranged on the side of the fixed plate 92, and the air inlet pipe 97 is connected to the sealing cylinder 93; the conduit 98 is arranged on the side of the fixed plate 92, and the conduit 98 is connected to the sealing cylinder 93, and the conduit 98 and the air inlet pipe 97 are installed with a one-way valve with opposite flow directions; the spring 99 is sleeved on the outer wall of the push rod 95 located on the inner side of the sealing cylinder 93, and the two ends of the spring 99 are fixedly connected to the push rod 95 and the sealing cylinder 93 respectively; the measuring When the rod 2 is pulled out of the bracket 1, the measuring rod 2 can slide along the bracket 1, and under the action of the toggle assembly, as the measuring rod 2 continues to slide, the push plate 96 and the sealing cylinder 93 slide relative to each other, and the piston plate 94 is driven to slide in the sealing cylinder 93 through the push rod 95, so that the piston plate 94 slides in the direction away from the fixed plate 92. Under the action of the one-way valve in the opposite flow direction set in the intake pipe 97 and the conduit 98, negative pressure is formed in the sealing cylinder 93 when the piston plate 94 slides, and air can pass through the intake pipe 97 and the conduit 98. Tube 97 enters into the sealing cylinder 93; when the handle 7 slides to the inner side of the wheel hub close to the end of the balancing machine, the handle 7 can be slightly rotated in the opposite direction close to the inner wall of the wheel hub. When the handle 7 is rotated, the push plate 96 can be separated from the top plate 113 by the toggle assembly. Under the action of spring 1 99, the push rod 95 and the push plate 96 can slide in the opposite direction to reset, and the piston plate 94 can also slide in the opposite direction to compress the gas in the sealing cylinder 93, so that the gas in the sealing cylinder 93 can be discharged along the conduit 98.

[0022] Reference Figure 5 , Figure 6The toggle assembly includes: a rotating shaft 111, which is rotatably mounted between the sides opposite to the fixing frame 10 and the bracket 1; a connecting plate 112, which is fixedly sleeved on one end of the rotating shaft 111; a top plate 113, which is slidably mounted on the inner side wall of the connecting plate 112, and the top of the top plate 113 is symmetrically provided with inclined surfaces, and the top plate 113 is located directly below the measuring rod 2; a spring 114, which is fixedly mounted between the bottom surface of the top plate 113 and the inner bottom wall of the connecting plate 112; a transmission mechanism, which is arranged on the measuring rod 2 and the rotating shaft 111; when the through-hole 91 on the measuring rod 2 slides to directly above the top plate 113, under the action of the spring 114, the top end of the top plate 113 can penetrate into the through-hole 91 and fit the outer wall of the sealing tube 93, and as the measuring rod 2 continues to slide, the top plate 113 can then slide to the position between the push plate 96 and the sealing tube 93, and the side surface can contact the side surface of the push plate 96 to limit the push plate 96.

[0023] Reference Figure 6 The transmission mechanism includes: a support sleeve 115, which is rotatably mounted on the inner wall of the bracket 1, and the support sleeve 115 is coaxially arranged with the measuring rod 2; a driving half gear 116, which is fixedly mounted on the end of the support sleeve 115 away from the bracket 1; a transmission gear 117, which is sleeved on the outer wall of the rotating shaft 111, and the transmission gear 117 is meshed with the driving half gear 116; a slide groove 118, which is provided on the outer wall of the measuring rod 2; a slider 119, which is fixedly mounted on the inner wall of the driving half gear 116, and the slider 119 is slidably connected with the slide groove 118; when the handle 7 is rotated, the driving half gear 116 can be driven to rotate through the cooperation of the slide groove 118 and the slider 119, and the driving half gear 116 is meshed with the transmission gear 117 on the rotating shaft 111, so that the transmission gear 117 and the rotating shaft 111 can be driven to rotate, so that the top plate 113 on the other end of the rotating shaft 111 rotates out of the outlet 91 and separates from the push plate 96.

[0024] Reference Figure 7 , Figure 8The cleaning assembly includes: a rotary joint 121, which is rotatably mounted on the end of the measuring head 8 away from the handle 7, and the end of the conduit 98 away from the sealing tube 93 is connected to the rotary joint 121; a cleaning roller 122, which is fixedly mounted on the end of the rotary joint 121 away from the measuring head 8; an air guide cavity 123, which is opened inside the cleaning roller 122, and the air guide cavity 123 is connected to the rotary joint 121; a plurality of nozzles 124, which are distributed in an annular array and opened on the outer wall of the cleaning roller 122, and the nozzles 124 are connected to the air guide cavity 123. Compared with the cleaning roller 1 22 is inclined in the radial direction; the cleaning mechanism is arranged on the outer wall of the cleaning roller 122; the gas in the sealing cylinder 93 can enter the air guide cavity 123 on the inner side of the cleaning roller 122 through the conduit 98 and the rotary joint 121, and can be ejected through the nozzle 124 on the outer wall of the cleaning roller 122. Since the nozzle 124 is arranged to be inclined compared to the radial direction of the cleaning roller 122, the cleaning roller 122 can be driven to rotate when the gas is ejected along the nozzle 124, and the gas ejected from the nozzle 124 can blow away the inner wall of the hub.

[0025] Reference Figure 8 The cleaning mechanism includes: a plurality of guide grooves 125, which are distributed in a circular array and are opened on the outer wall of the cleaning roller 122; a plurality of guide rods 126, which are respectively slidably mounted on the inner walls of the plurality of guide grooves 125; a plurality of cleaning plates 127, which are respectively fixedly mounted on one end of the plurality of guide rods 126 located outside the guide grooves 125, and the outer wall of the cleaning plate 127 is provided with flexible bristles; as the cleaning roller 122 rotates, the guide rod 126 can slide out of the guide groove 125 under the action of centrifugal force, and the inner wall of the wheel hub can be cleaned by the cleaning plate 127 at the end of the guide rod 126, and the flexible bristles can protect the inner wall of the wheel hub to avoid scratches. Before the measuring head 8 is fitted with the wheel hub, the cleaning roller 122 can clean the inner wall of the wheel hub, ensuring that the measuring head 8 is better fitted with the wheel hub, so as to accurately measure the distance between the tire and the balancing machine.

[0026] Reference Fig. 9 A tire balancing machine includes a balancing body 13, a driving shaft 14 is arranged on the side of the balancing body 13, and a bracket 1 and a baffle 3 are fixedly installed inside the balancing body 13; the balanced tire to be tested can be installed on the driving shaft 14 on the side of the balancing body 13, and then the distance between the tire and the balancing body 13 can be measured by an electronic measuring device. After the measurement is completed, the tire can be balanced through the balancing body 13.

[0027] The specific working principle of the present invention is as follows: When in use, the balancing tire to be tested can be first mounted on the driving shaft 14 on the side of the balancing body 13, and then the distance between the tire and the balancing body 13 can be measured by an electronic measuring device. During measurement, the measuring rod 2 can be pulled so that the measuring rod 2 extends out of the balancing body 13 along the bracket 1. When the handle 7 is moved to the inner measuring position of the wheel hub, the handle 7 can be rotated so that the measuring head 8 fits the inner wall of the wheel hub. The distance between the wheel hub and the balancing body 13 can be accurately measured through the cooperation of the length measuring structure 5 and the angle measuring structure 6. After the measurement is completed, the tire can be balanced through the balancing body 13. The working principle and connection method of the length measuring structure 5 and the angle measuring structure 6 are existing mature technologies and will not be described in detail here. When the measuring rod 2 is pulled out of the bracket 1 by the handle 7, the measuring rod 2 can slide along the bracket 1, and when the through-hole 91 on the measuring rod 2 slides to the top of the top plate 113, the top of the top plate 113 can penetrate into the through-hole 91 and fit the outer wall of the sealing cylinder 93 under the action of the spring 114. As the measuring rod 2 continues to slide, the top plate 113 can then slide to the position between the push plate 96 and the sealing cylinder 93, and the side surface can contact the side surface of the push plate 96 to limit the push plate 96. As the measuring rod 2 continues to slide, the push plate 96 and the sealing cylinder 93 slide relative to each other under the limiting action of the top plate 113, and the piston plate 94 is driven by the push rod 95 to slide in the sealing cylinder 93, so that the piston plate 94 slides in the direction away from the fixed plate 92. Under the action of the one-way valve with opposite flow directions set in the air inlet pipe 97 and the guide tube 98, negative pressure is formed in the sealing cylinder 93 when the piston plate 94 slides, and air can enter the sealing cylinder 93 through the air inlet pipe 97. When the handle 7 slides to the inner side of the wheel hub near the end of the balancing machine, the handle 7 can be slightly rotated in the opposite direction close to the inner wall of the wheel hub. When the handle 7 rotates, the driving half gear 116 can be driven to rotate through the cooperation of the slide groove 118 and the slider 119. The driving half gear 116 is meshed with the transmission gear 117 on the rotating shaft 111, so that the transmission gear 117 and the rotating shaft 111 can be driven to rotate, so that the top plate 113 on the other end of the rotating shaft 111 rotates out of the outlet 91 and separates from the push plate 96. After the push plate 96 is separated from the top plate 113, the push rod 95 and the push plate 96 can slide in the opposite direction to reset under the action of the spring 1 99, and the piston plate 94 can also slide in the opposite direction to compress the gas in the sealing cylinder 93, so that the gas in the sealing cylinder 93 can be discharged along the conduit 98; As the measuring rod 2 continues to slide, the gas in the sealing cylinder 93 can enter the air guide cavity 123 inside the cleaning roller 122 through the conduit 98 and the rotary joint 121, and can be ejected through the nozzle 124 on the outer wall of the cleaning roller 122. Since the nozzle 124 is set to be inclined relative to the radial direction of the cleaning roller 122, the cleaning roller 122 can be driven to rotate when the gas is ejected along the nozzle 124. At the same time, the gas ejected from the nozzle 124 can blow off the inner wall of the wheel hub. The handle 7 slides to the corresponding inner wall of the wheel hub. When the measuring head 8 is in the correct position, the measuring head 8 can be fitted with the inner wall of the wheel hub. As the cleaning roller 122 rotates, the guide rod 126 can slide out of the guide groove 125 under the action of centrifugal force, and the inner wall of the wheel hub can be cleaned by the cleaning plate 127 at the end of the guide rod 126. The flexible bristles can protect the inner wall of the wheel hub to avoid scratches. Before the measuring head 8 is fitted with the wheel hub, the cleaning roller 122 can clean the inner wall of the wheel hub, ensuring that the measuring head 8 fits better with the wheel hub, so as to accurately measure the distance between the tire and the balancing machine. After the measurement is completed, the handle 7 can be rotated in the opposite direction by a certain angle. At this time, the top plate 113 is still in a state of being offset from the push plate 96. Then the measuring rod 2 is reset and put into the balancing machine. The handle 7 can be further rotated and reset to drive the connecting plate 112 and the top plate 113 to reverse and reset so that they can be used again.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electronic measuring device, characterized in that: include: Bracket (1); A measuring rod (2) is arranged to penetrate the bracket (1), and the measuring rod (2) is movably connected to the penetration point, and an inner cavity is provided inside the measuring rod (2); A baffle (3) is arranged at an end of the measuring rod (2) away from the bracket (1); An elastic member (4) mounted on an outer wall of the measuring rod (2) between the bracket (1) and the baffle (3); A length measuring structure (5) arranged on the support (1); an angle measuring structure (6) disposed on the bracket (1), and the angle measuring structure (6) is used in conjunction with the length measuring structure (5) to measure the extended length of the measuring rod (2); A handle (7) fixedly mounted on an end of the measuring rod (2) away from the baffle (3); A measuring head (8) is arranged at an end of the handle (7) away from the measuring rod (2); An air guide component, arranged inside the measuring rod (2); A fixing frame (10) fixedly mounted on the inner bottom wall of the bracket (1); A toggle assembly, arranged between opposite sides of the bracket (1) and the fixing frame (10); A cleaning assembly is arranged at an end of the measuring head (8) away from the handle (7).

2. An electronic measuring device according to claim 1, characterized in that: The air guide component comprises: A through opening (91) is provided on the outer wall of the measuring rod (2); A fixing plate (92) fixedly mounted on an inner side wall at one end of the through opening (91); A sealing cylinder (93) fixedly mounted on a side of the fixing plate (92) and located inside the through opening (91); A piston plate (94) slidably mounted on the inner wall of the sealing cylinder (93); A push rod (95) is fixedly mounted on a side surface of the piston plate (94), and an end of the push rod (95) away from the piston plate (94) passes through the sealing cylinder (93); A push plate (96) fixedly mounted on one end of the push rod (95) located outside the sealing cylinder (93); An air intake pipe (97) is arranged on a side of the fixing plate (92), and the air intake pipe (97) is in communication with the sealing cylinder (93); A conduit (98) is disposed on a side of the fixing plate (92), and the conduit (98) is in communication with the sealing cylinder (93); A spring (99) is sleeved on the outer wall of the push rod (95) located inside the sealing cylinder (93), and two ends of the spring (99) are fixedly connected to the push rod (95) and the sealing cylinder (93) respectively.

3. An electronic measuring device according to claim 2, characterized in that: One-way valves with opposite flow directions are installed inside the conduit (98) and the air inlet pipe (97), and the diameter of the push plate (96) is at least smaller than the inner diameter of the inner cavity.

4. An electronic measuring device according to claim 3, characterized in that: The toggle assembly comprises: A rotating shaft (111) is rotatably mounted between the fixing frame (10) and the opposite side surfaces of the bracket (1); A connecting plate (112) fixedly sleeved on one end of the rotating shaft (111); A top plate (113) slidably mounted on the inner side wall of the connecting plate (112); A second spring (114) is fixedly mounted between the bottom surface of the top plate (113) and the inner bottom wall of the connecting plate (112); A transmission mechanism is arranged on the measuring rod (2) and the rotating shaft (111).

5. An electronic measuring device according to claim 4, characterized in that: The transmission mechanism comprises: A support sleeve (115) is rotatably mounted on the inner wall of the bracket (1), and the support sleeve (115) is coaxially arranged with the measuring rod (2); A driving half gear (116) fixedly mounted on an end of the support sleeve (115) away from the bracket (1); A transmission gear (117) is sleeved on the outer wall of the rotating shaft (111), and the transmission gear (117) is meshed with the driving half gear (116); A slide groove (118) is provided on the outer wall of the measuring rod (2); A sliding block (119) is fixedly mounted on the inner side wall of the driving half gear (116), and the sliding block (119) is slidably connected to the sliding groove (118).

6. An electronic measuring device according to claim 5, characterized in that: The top end of the top plate (113) is symmetrically provided with inclined surfaces, and the top plate (113) is located directly below the measuring rod (2).

7. An electronic measuring device according to claim 6, characterized in that: The cleaning component includes: A rotary joint (121) is rotatably mounted on an end of the measuring head (8) away from the handle (7), and an end of the conduit (98) away from the sealing cylinder (93) is in communication with the rotary joint (121); A cleaning roller (122) fixedly mounted on an end of the rotary joint (121) away from the measuring head (8); An air guide cavity (123) is provided inside the cleaning roller (122), and the air guide cavity (123) is in communication with the rotary joint (121); A plurality of nozzles (124) are distributed in a ring array and are arranged on the outer wall of the cleaning roller (122), and the nozzles (124) are in communication with the air guide cavity (123); The cleaning mechanism is arranged on the outer wall of the cleaning roller (122).

8. An electronic measuring device according to claim 7, characterized in that: The cleaning mechanism comprises: A plurality of guide grooves (125) are distributed in an annular array and are arranged on the outer wall of the cleaning roller (122); A plurality of guide rods (126) are slidably mounted on the inner side walls of the plurality of guide grooves (125); A plurality of cleaning plates (127) are respectively fixedly mounted on one end of a plurality of guide rods (126) located outside the guide groove (125).

9. An electronic measuring device according to claim 8, characterized in that: The nozzle (124) is arranged obliquely relative to the radial direction of the cleaning roller (122), and the outer surface wall of the cleaning plate (127) is provided with flexible bristles.

10. A tire balancing machine, using an electronic measuring device as claimed in any one of claims 1 to 9, characterized in that: It comprises a balancing body (13), a driving shaft (14) being arranged on the side of the balancing body (13), and the bracket (1) and the baffle (3) being fixedly mounted inside the balancing body (13).

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