Continuously variable transmission air tightness detection and spring press fitting all-in-one machine and production method

Abstract

The invention provides a continuously variable transmission air tightness detection and spring press fitting all-in-one machine and a production method, and belongs to the technical field of continuously variable transmission production equipment structures. According to the all-in-one machine, through the design that the air tightness detection module is installed on the spring press-fitting module, the problem that in the prior art, missing detection is prone to occurring in the air tightness detection process is solved. The all-in-one machine comprises a spring press-fitting module, the spring press-fitting module comprises a positioning base, a press-fitting block and a power piece, and the power piece drives the press-fitting block to move up and down above the positioning base; an air tightness detection module is mounted on the spring press-fitting module and comprises an upper sealing element, a lower sealing element, an air passage and air tightness detection equipment; the lower sealing piece is installed at the top of the positioning base, the upper sealing piece is installed at the bottom of the press-fitting block, and the air channel penetrates through the positioning base and the lower sealing piece. The upper end of the air channel communicates with the upper portion of the lower sealing piece, and the lower end of the air channel communicates with air tightness detection equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of structure of continuously variable transmission production equipment, and in particular relates to an integrated machine for air tightness detection and spring pressing of continuously variable transmission and a production method. Background Art

[0002] The continuously variable transmission is currently widely used in the transmission system of scooters. It uses a transmission belt and a master and driven wheel with variable working diameters to transmit power, and can achieve continuous changes in the transmission ratio, thereby obtaining the best match between the transmission system and the engine operating conditions.

[0003] The mobile spring seat in the continuously variable transmission is an important component. The mobile spring seat provides the necessary resistance through its internal spring, so that the driven wheel can stably maintain the correct transmission ratio with the driving wheel. This design can reduce the friction loss in the transmission process, improve the transmission efficiency, and ensure that the driven wheel can operate stably under various working conditions, thereby improving the starting acceleration performance and climbing ability of the motorcycle. However, due to the large spring force of the mobile spring seat, during the press-fitting process, a special press-fitting tool should be used to press the spring into position to ensure the strength and direction of the installation, ensure that it is closely matched with the transmission housing, and avoid damage to the spring seat or the transmission housing. At the same time, during the production process of the continuously variable transmission, it should be placed in a special closed device and gas should be injected into it to check the air tightness.

[0004] Whether it is press-fitting the spring on the movable spring seat or checking the air tightness, special tooling is required. In the existing production process, the two processes each have special tooling, and the operator needs to load and unload the materials separately when performing each process. Not only does it have many process steps and is time-consuming, but also because the air tightness detection process cannot be directly observed with the naked eye like the spring on the press-fit spring seat, this process is prone to missed inspections. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide an integrated machine and production method for continuously variable transmission air tightness detection and spring pressing, which is used to solve the problem that the prior art uses separate dedicated tooling for the continuously variable transmission air tightness detection and spring seat spring pressing processes, resulting in many process steps, long time consumption and easy omissions in the air tightness detection process.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides an integrated machine for air tightness detection and spring pressing of a continuously variable transmission, including a spring pressing module, wherein the spring pressing module includes a positioning base, a pressing block and a power piece, and the power piece drives the pressing block to move up and down above the positioning base; an air tightness detection module is installed on the spring pressing module, and the air tightness detection module includes an upper seal, a lower seal, an air duct and an air tightness detection device; the lower seal is installed on the top of the positioning base, the upper seal is installed on the bottom of the pressing block, and the air duct passes through the positioning base and the lower seal; the upper end of the air duct is connected to the top of the lower seal, and the lower end of the air duct is connected to the air tightness detection device.

[0007] Optionally, the spring press-fitting module further includes a sleeve; the sleeve is fixedly mounted on the press-fitting block, an opening at the bottom of the sleeve faces the positioning base, and the upper sealing member is located inside the sleeve.

[0008] Optionally, the spring pressing module further includes a guide component; the guide component includes a guide column and a guide sleeve, the guide column is vertically installed, the guide sleeve is slidably installed on the guide column, and the pressing block and the guide sleeve are fixedly connected.

[0009] Optionally, the guide component further includes a guide spring; the guide spring is sleeved on the guide column, the top end of the guide spring is connected to the guide sleeve, and the bottom end of the guide spring is connected to the bottom of the guide column.

[0010] Optionally, the guide component also includes a limit column, which is installed between the bottom of the guide column and the press block; the limit column includes an upper limit sleeve, a lower limit sleeve and an adjustment sleeve, the upper limit sleeve slides with the guide sleeve, the lower limit sleeve is fixedly installed on the bottom of the guide column, and the adjustment sleeve is installed between the upper limit sleeve and the lower limit sleeve.

[0011] Optionally, the press-fitting block and the guide sleeve are fixedly connected via a connecting plate.

[0012] Optionally, the positioning base includes a bottom plate and a positioning plate, the positioning plate is fixedly mounted on the bottom plate, and the air passage passes through the positioning plate and the lower sealing member.

[0013] Optionally, it also includes a base frame, and the power component is a telescopic cylinder, which is fixedly installed on the base frame; a pressure plate is fixedly installed on the telescopic end of the telescopic cylinder, and the telescopic cylinder drives the pressure plate to move up and down, and the up and down movement of the pressure plate drives the pressing block to move up and down.

[0014] Optionally, the air passage includes an air hole and a ventilation tube; the air hole is opened on the positioning base and the lower seal, the ventilation tube passes through the air hole, one end of the ventilation tube is connected to the top of the lower seal, and the other end of the ventilation tube is connected to the air tightness detection equipment.

[0015] Based on the above-mentioned method for producing a continuously variable transmission air tightness detection and spring press-fitting integrated machine, the method comprises the following steps:

[0016] S1: placing the continuously variable transmission on the positioning base, the air passage is connected to the lower outlet of the continuously variable transmission, and the lower outlet of the continuously variable transmission and the end surface of the lower sealing member are against each other;

[0017] S2: Put the spring on the main shaft of the continuously variable transmission;

[0018] S3: starting the power member, driving the press-fitting block to move downward, press-fitting the spring onto the continuously variable transmission, while the upper outlet of the continuously variable transmission and the end surface of the upper sealing member abut against each other, and then closing the power member;

[0019] S4: the air tightness detection device injects gas into the airway and performs air tightness detection;

[0020] S5: Start the power part again, drive the press block to move upward, and remove the continuously variable transmission.

[0021] As described above, the continuously variable transmission air tightness detection and spring press-fitting integrated machine and production method of the present invention have at least the following beneficial effects:

[0022] 1. The integrated machine for air tightness detection and spring pressing of the continuously variable transmission is designed with an air tightness detection module installed on the spring pressing module, so that the operator can perform air tightness detection on the continuously variable transmission on the same tooling during the process of pressing the spring of the continuously variable transmission, without the need for repeated loading and unloading, thus reducing process steps and saving working time.

[0023] 2. A production method based on a machine for integrating air tightness detection and spring pressing of a continuously variable transmission realizes the two processes of air tightness detection and spring pressing of the continuously variable transmission on the same tooling. Compared with the separate process steps in the prior art, not only is the working time shorter; at the same time, because the air tightness detection of the continuously variable transmission is carried out on the same tooling after the spring is pressed, whether the spring is pressed can be directly observed by the naked eye, thus solving the problem of missed detection in the air tightness detection process in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is a schematic diagram of a continuously variable transmission air tightness detection and spring press-fitting integrated machine according to the present invention.

[0025] Figure 2 Display as Figure 1 Side view of.

[0026] Figure 3 Shown is a flow chart of the production method of the present invention.

[0027] Component number description

[0028] Spring press module 1, positioning base 11, bottom plate 111, positioning plate 112, press block 12, power piece 13, pressure plate 131, sleeve 14, guide component 15, guide column 151, guide sleeve 152, guide spring 153, upper limit sleeve 1541, adjustment sleeve 1542, lower limit sleeve 1543, connecting plate 155, bushing 156;

[0029] Air tightness detection module 2, upper sealing member 21, lower sealing member 22, vent pipe 231, air pipe joint 232, gasket 233;

[0030] Base frame 3. DETAILED DESCRIPTION

[0031] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0032] See also Figure 1 to Figure 2 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0033] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0034] See also Figure 1The present invention provides an integrated machine for detecting air tightness of a continuously variable transmission and for pressing and assembling a spring, comprising a spring pressing module 1, wherein the spring pressing module 1 comprises a positioning base 11, a pressing block 12 and a power piece 13, wherein the power piece 13 drives the pressing block 12 to move up and down above the positioning base 11; similar to the spring pressing module 1 of the existing continuously variable transmission, an operator installs the continuously variable transmission to be processed onto the positioning base 11, and then sleeves the spring onto the main shaft of the continuously variable transmission, and then starts the power piece 13 to drive the pressing block 12 to move downward, and the side of the pressing block 12 can be designed with a downwardly protruding portion, so that the pressing block 12 can press and assemble the spring downward from the periphery of the main shaft of the continuously variable transmission, and press and assemble the spring to a position that meets the process requirements.

[0035] like Figure 1 As shown, unlike the aforementioned prior art, the core design point of the present all-in-one machine is that an airtightness detection module 2 is installed on the spring pressing module 1, and the airtightness detection module 2 includes an upper seal 21, a lower seal 22, an air duct and an airtightness detection device; the lower seal 22 is installed on the top of the positioning base 11, the upper seal 21 is installed on the bottom of the pressing block 12, and the air duct passes through the positioning base 11 and the lower seal 22; the upper end of the air duct is connected to the top of the lower seal 22, and the lower end of the air duct is connected to the airtightness detection device.

[0036] like Figure 1 As shown, when the operator installs the CVT on the positioning base 11, it is necessary to ensure that the lower outlet of the CVT and the end face of the lower seal 22 are against each other, and at the same time, the air duct is connected to the interior of the CVT; when the press-fitting block 12 moves downward and presses the spring downward from the periphery of the main shaft of the CVT, and presses the spring to a position that meets the process requirements, the end face of the upper seal 21 at the bottom of the press-fitting block 12 and the upper opening of the CVT are against each other, that is, the interior of the CVT can only be connected to the outside through the air duct. At this time, the operator uses an airtightness detection device to inflate the interior of the CVT (generally, helium is filled with an inert gas) and perform an airtightness detection.

[0037] Pressing the spring and testing the air tightness of the continuously variable transmission on the same tool not only avoids repeated loading and unloading, reduces process steps, and saves working time, but also because the all-in-one machine performs air tightness testing on the continuously variable transmission on the same tool after pressing the spring, whether the spring is pressed can be directly observed by the naked eye, thereby solving the problem in the prior art that it is difficult to directly observe whether the air tightness testing process is completed on the continuously variable transmission with the naked eye, which is prone to missed detection.

[0038] like Figure 1As shown, considering the shapes of the upper and lower outlets of the continuously variable transmission, the upper seal 21 can be a plug-shaped workpiece, and the lower seal 22 can be a sealing ring, which will not be repeated here.

[0039] In another embodiment, see Figure 2 The spring pressing module 1 also includes a sleeve 14; the sleeve 14 is fixedly mounted on the pressing block 12, the opening at the bottom of the sleeve 14 faces the positioning base 11, the upper seal 21 is located inside the sleeve 14, the inner diameter of the sleeve 14 is slightly larger than the outer diameter of the spring, and the maximum range is 0.3-0.5mm. The design of the sleeve 14 makes it unnecessary for the pressing block 12 to design protrusions similar to presser feet around it. The spring can be pressed into place from all around the main shaft of the continuously variable transmission by directly using the sleeve 14. At the same time, the sleeve 14 can also prevent the spring from being severely deformed during the pressing process; at the same time, the sleeve 14 can be detachably fixedly connected to the pressing block 12 by bolt connection. The operator selects a suitable sleeve 14 according to the model of the continuously variable transmission, which further improves the applicability of the all-in-one machine and the stability of the quality of the pressed spring.

[0040] In another embodiment, see Figure 1 The spring pressing module 1 also includes a guide component 15; the guide component 15 includes a guide column 151 and a guide sleeve 152, the guide column 151 is vertically installed, and the guide sleeve 152 is slidably installed on the guide column 151, and the pressing block 12 and the guide sleeve 152 are fixedly connected. The design of the guide column 151 and the guide sleeve 152 ensures that the pressing block 12 can press the spring vertically downward without deviation, which is beneficial to the quality stability of the pressing process.

[0041] In another embodiment, see Figure 1 The guide component 15 also includes a guide spring 153; the guide spring 153 is sleeved on the guide column 151, the top of the guide spring 153 is connected to the guide sleeve 152, and the bottom of the guide spring 153 is connected to the bottom of the guide column 151. The design of the guide spring 153 provides a buffer for the downward movement of the guide sleeve 152, that is, it provides a buffer for the downward movement of the press-fitting block 12, prevents the press-fitting block 12 from falling quickly, and causes damage to the housing, spring seat and spring of the continuously variable transmission, thereby improving the stability of the processing quality of this process.

[0042] In another embodiment, see Figure 2The guide component 15 also includes a limit column, which is installed between the bottom of the guide column 151 and the press-fit block 12; the limit column includes an upper limit sleeve 1541, a lower limit sleeve 1543 and an adjustment sleeve 1542, the upper limit sleeve 1541 slides with the guide sleeve 152, the lower limit sleeve 1543 is fixedly installed at the bottom of the guide column 151, and the adjustment sleeve 1542 is installed between the upper limit sleeve 1541 and the lower limit sleeve 1543. The design of the limit column avoids the guide sleeve 1 52 is moved downward too much, that is, the press-fitting block 12 is avoided from moving downward too much, which may damage the housing, spring seat and spring of the continuously variable transmission; this embodiment also provides a specific structural form of a limit column, and the adjustment sleeve 1542 can be detachably installed on the upper limit sleeve 1541 or the lower limit sleeve 1543. Different sizes of adjustment sleeves 1542 can be selected according to different models of the continuously variable transmission; designers can also choose other limit column structural forms, such as a solid column, which will not be repeated here.

[0043] In another embodiment, see Figure 1 The pressing block 12 and the guide sleeve 152 are fixedly connected via a connecting plate 155 to ensure the stability of the connection between the pressing block 12 and the guide sleeve 152 .

[0044] In another embodiment, see Figure 2 The positioning base 11 includes a bottom plate 111 and a positioning plate 112. The positioning plate 112 is fixedly mounted on the bottom plate 111. The air duct passes through the positioning plate 112 and the lower seal 22. When the air duct size deviates, the operator only needs to replace the positioning plate 112, thereby improving the maintainability of the all-in-one machine.

[0045] In another embodiment, see Figure 1 , also includes a base frame 3, the power part 13 is a telescopic cylinder, and the telescopic cylinder is fixedly installed on the base frame 3; a pressing plate 131 is fixedly installed at the telescopic end of the telescopic cylinder, and the telescopic cylinder drives the pressing plate 131 to move up and down, and the pressing plate 131 moves up and down to drive the pressing block 12 to move up and down. The base frame 3 ensures the stability of the telescopic cylinder during operation. The design of the pressing plate 131 avoids the direct collision between the telescopic cylinder and the pressing block 12, thereby improving the service life of the telescopic cylinder.

[0046] In another embodiment, see Figure 2The air passage includes an air hole and a vent pipe 231; the air hole is opened on the positioning base 11 and the lower seal 22, and the vent pipe 231 passes through the air hole. One end of the vent pipe 231 is connected to the top of the lower seal 22, and the other end of the vent pipe 231 is connected to the air tightness detection equipment. The design of the vent pipe 231 further improves the maintainability of the all-in-one machine. The vent pipe 231 needs to use a gasket 233 and an air pipe joint 232 to ensure the reliability of the connection with the air tightness detection equipment. The specific connection structure will not be repeated here.

[0047] In another embodiment, see Figure 2 The upper end of the guide column 151 is fixedly mounted above the base frame 3, and the lower end of the guide column 151 is fixedly mounted on the bottom plate 111. A bushing 156 is used at the mounting position to ensure the firmness of the mounting.

[0048] In other embodiments, Figure 1 As shown, the fixed connection described above can adopt a detachable fixed connection method such as bolts to improve the subsequent maintainability of the all-in-one machine, which will not be repeated here.

[0049] See also Figure 1 and Figure 2 , based on the above-mentioned production method of a continuously variable transmission air tightness detection and spring press-fitting integrated machine, comprising the following steps:

[0050] S1: According to the model of the continuously variable transmission to be processed, an adjustment sleeve 1542 of a suitable size, a sleeve 14 of a suitable size, and a positioning plate 112 of a suitable size are selected, and the selected adjustment sleeve 1542, sleeve 14, and positioning plate 112 are installed on the integrated machine; then the operator installs the continuously variable transmission to be processed on the positioning plate 112, ensuring that the vent pipe 231 is connected to the lower outlet of the continuously variable transmission, and at the same time, the lower outlet of the continuously variable transmission and the end surface of the lower sealing member 22 are abutted;

[0051] S2: Then put the spring on the main shaft of the continuously variable transmission;

[0052] S3: Start the power member 13, drive the press block 12 to move downward with the sleeve 14, and the side of the sleeve 14 presses the spring onto the continuously variable transmission. At the same time, when the upper outlet of the continuously variable transmission abuts against the end surface of the upper sealing member 21, close the power member 13. At this time, the interior of the continuously variable transmission is sealed except that it is connected to the air tightness detection equipment through the vent pipe 231.

[0053] S4: Operate the airtightness testing device to inject gas into the airway. In order to ensure safety, inert gas, helium, is generally injected. After a certain amount of helium is injected, an airtightness test is performed. If the test is qualified, the green light on the airtightness testing device turns on, and if the test is unqualified, the red light on the airtightness testing device turns on;

[0054] S5: Start the power part 13 again, drive the pressing block 12 to move up with the sleeve 14, and the operator takes out the continuously variable transmission, and places the continuously variable transmission into different containers according to the results of the air tightness test, and then takes another continuously variable transmission to be processed for processing.

[0055] In summary, the present invention is designed to install an airtightness detection module 2 on the spring pressing module 1, so that the operator can perform airtightness detection on the continuously variable transmission on the same tooling during the process of pressing the spring for the continuously variable transmission, without repeated loading and unloading, reducing process steps and saving man-hours; at the same time, the production method of the present invention realizes the two processes of airtightness detection and spring pressing of the continuously variable transmission on the same tooling, which is not only shorter in man-hours than the process steps performed separately in the prior art; and because the airtightness detection of the continuously variable transmission is performed on the same tooling after the spring is pressed, whether the spring is pressed can be directly observed by the naked eye, so the problem of easy missed detection in the airtightness detection process in the prior art is also solved. Therefore, the present invention effectively overcomes the shortcomings of the prior art and has a high industrial utilization value.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A machine for testing air tightness of a continuously variable transmission and for pressing and assembling a spring, comprising a spring pressing and assembling module, wherein the spring pressing and assembling module comprises a positioning base, a pressing and assembling block and a power member, wherein the power member drives the pressing and assembling block to move up and down above the positioning base; characterized in that: An air tightness detection module is installed on the spring press module, and the air tightness detection module includes an upper sealing member, a lower sealing member, an air duct and an air tightness detection device; The lower seal is installed on the top of the positioning base, the upper seal is installed on the bottom of the press-fit block, and the air passage passes through the positioning base and the lower seal; The upper end of the air passage is connected to the upper side of the lower sealing member, and the lower end of the air passage is connected to the air tightness detection device.

2. The machine for testing air tightness of a continuously variable transmission and for pressing and assembling a spring according to claim 1, characterized in that: The spring press module also includes a sleeve; The sleeve is fixedly mounted on the press-fitting block, the opening of the bottom of the sleeve faces the positioning base, and the upper sealing member is located inside the sleeve.

3. The machine for testing air tightness of a continuously variable transmission and for pressing and assembling a spring according to claim 1, characterized in that: The spring press module also includes a guide component; The guide component comprises a guide column and a guide sleeve, the guide column is vertically installed, the guide sleeve is slidably installed on the guide column, and the press-fitting block is fixedly connected to the guide sleeve.

4. The machine for testing air tightness of a continuously variable transmission and for pressing and assembling a spring according to claim 3, characterized in that: The guide component also includes a guide spring; The guide spring is sleeved on the guide column, the top end of the guide spring is connected to the guide sleeve, and the bottom end of the guide spring is connected to the bottom of the guide column.

5. The machine for testing air tightness of a continuously variable transmission and for pressing and assembling a spring according to claim 3, characterized in that: The guide component further comprises a limiting column, and the limiting column is installed between the bottom of the guide column and the press-fitting block; The limit column comprises an upper limit sleeve, a lower limit sleeve and an adjustment sleeve. The upper limit sleeve slides with the guide sleeve, the lower limit sleeve is fixedly installed at the bottom of the guide column, and the adjustment sleeve is installed between the upper limit sleeve and the lower limit sleeve.

6. The machine for testing air tightness of a continuously variable transmission and for pressing and assembling a spring according to claim 3, characterized in that: The press-fitting block and the guide sleeve are fixedly connected via a connecting plate.

7. The machine for testing air tightness of a continuously variable transmission and for pressing and assembling a spring according to claim 1, characterized in that: The positioning base comprises a bottom plate and a positioning plate, the positioning plate is fixedly mounted on the bottom plate, and the air passage passes through the positioning plate and the lower sealing member.

8. The machine for testing air tightness of a continuously variable transmission and for pressing and assembling a spring according to claim 1, characterized in that: It also includes a base frame, the power member is a telescopic cylinder, and the telescopic cylinder is fixedly mounted on the base frame; A pressing plate is fixedly mounted on the telescopic end of the telescopic cylinder. The telescopic cylinder drives the pressing plate to move up and down, and the up and down movement of the pressing plate drives the pressing block to move up and down.

9. The machine for testing air tightness of a continuously variable transmission and for pressing and assembling a spring according to claim 1, characterized in that: The airway includes a vent and a vent tube; The air hole is opened on the positioning base and the lower sealing member, the ventilation pipe passes through the air hole, one end of the ventilation pipe is connected to the top of the lower sealing member, and the other end of the ventilation pipe is connected to the air tightness detection device.

10. A method for producing a continuously variable transmission air tightness detection and spring press-fitting integrated machine according to any one of claims 1 to 9, characterized in that The following steps are involved: S1: placing the continuously variable transmission on the positioning base, the air passage is connected to the lower outlet of the continuously variable transmission, and the lower outlet of the continuously variable transmission and the end surface of the lower sealing member are against each other; S2: Put the spring on the main shaft of the continuously variable transmission; S3: starting the power member, driving the press-fitting block to move downward, press-fitting the spring onto the continuously variable transmission, while the upper outlet of the continuously variable transmission and the end surface of the upper sealing member abut against each other, and then closing the power member; S4: the air tightness detection device injects gas into the airway and performs air tightness detection; S5: Start the power part again, drive the press block to move upward, and remove the continuously variable transmission.

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