Integrated tooling for adjusting the needle valve height and detecting leaks in small gasoline engine carburetors

Abstract

The present invention relates to the technical field of carburetor production, and in particular discloses an integrated tooling for adjusting the height and leak detection of needle valves of carburetors of small gasoline engines, comprising an adjusting height needle, a first driving member driving the adjusting height needle to rise and fall, a positioning seat located below the adjusting height needle, and a feedback unit, wherein the positioning seat is provided with a mounting cavity for accommodating the carburetor, a push rod is passed through the positioning seat, a second driving member driving the push rod to rise and fall is provided below the positioning seat, an air intake nozzle and an air intake channel connecting the air intake nozzle and the carburetor body are provided on the positioning seat, a first sensing member is provided on the adjusting height needle, a second sensing member is provided in the air intake channel, and both the first sensing member and the second sensing member are connected to the feedback unit. By adopting the above structure, an integrated tooling for adjusting the height and leak detection is provided, and two processes are carried out on one tooling, which can be completed with only one placing and taking action, with high production efficiency and good product consistency.

Description

Technical Field

[0001] The invention relates to the technical field of carburetor production, in particular to an integrated tool for adjusting the height and detecting the leak of a needle valve of a small gasoline engine carburetor. Background Art

[0002] At present, the installation height of the needle valve rocker arm and the sealing of the needle valve seat of the universal small carburetor have a great influence on the performance of the carburetor. The dimensions of the body processing, needle valve seat, needle valve rocker arm, needle valve opening and closing parts, needle valve rocker arm pin and other accessories have an impact on the installation height of the needle valve rocker arm. The cumulative error of these accessories leads to poor consistency of the carburetor. It is necessary to adjust the installation height of the needle valve rocker arm after these accessories are installed. In order to ensure the sealing effect of the needle valve seat system, it is necessary to perform an air tightness test after the above accessories are assembled. The existing assembly method is to use the needle valve rocker arm height adjustment tooling and the needle valve seat leak detection tooling to separate the two processes, which requires two placement and removal actions, a large workload for operators, low production efficiency, and waste of costs. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides an integrated height adjustment and leak detection tooling, which places two processes on one tooling and can be completed with only one placing and taking action, with low workload for operators, high production efficiency and good product consistency.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an integrated tool for adjusting the height and leak detection of the needle valve of a small gasoline engine carburetor, comprising a height adjustment needle, a first driving member for driving the height adjustment needle to rise and fall, a positioning seat located below the height adjustment needle, and a feedback unit, the positioning seat being provided with a mounting cavity for accommodating the carburetor, the positioning seat being provided with a push rod, a second driving member for driving the push rod to rise and fall being provided below the positioning seat, an air intake nozzle and an air intake channel connecting the air intake nozzle and the carburetor body being provided on the positioning seat, a first sensing member being provided on the height adjustment needle, a second sensing member being provided in the air intake channel, and both the first sensing member and the second sensing member being connected to the feedback unit.

[0005] In the above technical solution, the two processes of adjusting the height of the needle valve rocker arm and detecting the leakage of the needle valve seat are carried out on the same tooling, which can be completed with only one loading and unloading action without multiple operations. Changing from two sets of tooling to one set of tooling saves costs, and the tooling occupies less space, the operator's workload is low, the production efficiency is high, and the product consistency is good.

[0006] As a further configuration of the present invention, the second driving member includes a driving gear and a driven gear meshing with each other, the driving gear is driven by a motor, one end of the push rod passes through the positioning seat and is placed in the installation cavity, and the other end is threadedly connected to the driven gear.

[0007] In the above technical solution, the second driving member is composed of two-stage gears with high adjustment accuracy. Of course, the number of gears is not limited to two. The number of gears can be increased or decreased according to the accuracy requirements of the tooling, the structure can be optimized, the components can be simplified, and the cost can be reduced. The driven gear and the top rod are driven by the principle of a screw.

[0008] As a further configuration of the present invention, the feedback unit includes a display panel, and a plurality of indicator lights are arranged on the display panel.

[0009] In the above technical solution, the indicator lights are divided into three red signal lights, namely, high light, low light, and air leakage light, and a green OK signal light, so that the operator can receive the detection information in time and improve the adjustment efficiency.

[0010] As a further configuration of the present invention, the push rod includes a top, a connecting part connected to the top, and a sleeve sleeved outside the connecting part, the sleeve is threadedly connected to the driven gear, and the lower end of the positioning seat is provided with a guide groove for the connecting part and the sleeve to be embedded and guided to slide, a compression spring is provided between the connecting part and the bottom surface of the guide groove, the end of the connecting part facing the bottom surface of the guide groove is exposed outside the sleeve, and the outer peripheral surface of the end is provided with a convex ring that abuts against the sleeve, the outer peripheral surface of the convex ring is sealingly connected to the inner wall of the guide groove, and the space where the compression spring is located is connected to the air inlet nozzle.

[0011] In the above technical solution, the push rod is composed of three parts, which is convenient for installation and replacement. The top and the connecting part can be integrated or detachable. The convex ring is mounted on the sleeve. When the sleeve rises, the sleeve pushes the convex ring to make the connecting part rise. When the sleeve descends, the connecting part is reset under the action of the compression spring. The structure is simple and the lifting and lowering are precise, which avoids friction between the top and the needle valve seat due to rotation.

[0012] As a further configuration of the present invention, a limiting sleeve sleeved on the connecting portion is provided below the driven gear, and the limiting sleeve is fixed on the connecting portion by a first positioning pin penetrated along the radial direction thereof.

[0013] In the above technical solution, the setting of the limiting sleeve can limit the rising range of the push rod, and the limiting sleeve and the connecting part are fixed by the first positioning pin, which has a simple structure and is easy to install.

[0014] As a further configuration of the present invention, the top portion is embedded in the connecting portion, and a second positioning pin is provided on the outer peripheral surface of the connecting portion and penetrates in the radial direction thereof, and the second positioning pin abuts against the outer peripheral surface of the top portion.

[0015] In the above technical solution, the top and the connecting part are detachable, which is convenient for replacement and prolongs the service life.

[0016] As a further configuration of the present invention, a bracket for installing the first driving member is arranged above the positioning seat, and the bracket includes a mounting plate and a column, so that a guide member that can slide along its axial direction is sleeved on the column, the height adjustment needle is fixed on the guide member, and the first driving member drives the guide member to rise and fall.

[0017] In the above technical solution, the height adjustment needle is more stable during movement, has higher precision, simple structure and convenient processing.

[0018] As a further configuration of the present invention, the guide member includes a guide plate sleeved on the column and a pressure plate connected to the guide plate, the output portion of the first driving member is connected to the guide plate, and the height adjustment needle is inserted into the pressure plate.

[0019] In the above technical solution, the height adjustment needle is fixed more stably, which prevents the height adjustment needle from falling off or shifting during use, improves the height adjustment accuracy, is easy to install, and has a simple structure.

[0020] As a further configuration of the present invention, the pressure plate is provided with a through hole, and a positioning plate which can be fixed on the pressure plate is provided above the through hole. The height adjustment needle is penetrated through the positioning plate and threadedly connected with the positioning plate, and its end portion passes through the positioning plate and then out of the through hole to be exposed below the through hole, and the width of the through hole is greater than the diameter of the height adjustment needle.

[0021] In the above technical solution, the contact area is increased to make the height adjustment needle more stably fixed, and the setting of the through hole has a guiding function to facilitate the adjustment of the height adjustment needle.

[0022] As a further configuration of the present invention, the through hole is T-shaped.

[0023] The above technical solution is easy to adjust, adaptable to carburetors of different structures, has a wide range of applications, and saves costs.

[0024] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 It is a schematic diagram of the structure of a specific embodiment of the present invention;

[0026] Attached Figure 2 It is a structural schematic diagram of a positioning seat according to a specific embodiment of the present invention;

[0027] Attached Figure 3 It is a structural schematic diagram of a second driving member in a specific embodiment of the present invention;

[0028] Attached Figure 4 It is a structural cross-sectional view of the side leakage part of a specific embodiment of the present invention;

[0029] Attached Figure 5 It is a structural side view of a specific embodiment of the present invention;

[0030] Attached Figure 6 For attachment Figure 5 AA section view;

[0031] Attached Figure 7 It is a front view of the structure of a specific embodiment of the present invention;

[0032] Attached Figure 8 For attachment Figure 7 BB cross-sectional view;

[0033] Attached Fig. 9 It is a structural cross-sectional view of the height-adjusting part of a specific embodiment of the present invention. DETAILED DESCRIPTION

[0034] The specific implementation example of the present invention is Figure 1-9 As shown, a small gasoline engine carburetor needle valve height adjustment and leak detection integrated tooling includes a height adjustment needle 1, a first driving member 2 for driving the height adjustment needle 1 to rise and fall, a positioning seat 3 located below the height adjustment needle 1, and a feedback unit 4, the positioning seat 3 is provided with a mounting cavity 31 for accommodating a carburetor 5, a push rod 6 is passed through the positioning seat 3, a second driving member 7 for driving the push rod 6 to rise and fall is provided below the positioning seat 3, an air intake nozzle 32 and an air intake channel 33 connecting the air intake nozzle 32 and the carburetor 5 body are provided on the positioning seat 3, a first sensing member is provided on the height adjustment needle 1, a second sensing member is provided in the air intake channel 33, and the first sensing member and the second sensing member are both connected to the feedback unit 4.

[0035] The two processes of adjusting the needle valve rocker arm and testing the needle valve seat for leaks are carried out on the same tooling. Only one loading and unloading action is required to complete the process without multiple operations. Changing from two sets of tooling to one set of tooling saves costs, takes up less space for tooling, reduces the workload of operators, increases production efficiency, and ensures good product consistency.

[0036] The second driving member 7 comprises a driving gear 71 and a driven gear 72 meshing with each other, the driving gear 71 is driven by a motor 73, one end of the push rod 6 passes through the positioning seat 3 and is placed in the mounting cavity 31, and the other end is threadedly connected with the driven gear 72. The second driving member 7 is composed of two-stage gears with high adjustment accuracy. Of course, the number of gears is not limited to two. The number of gears can be increased or decreased according to the accuracy requirements of the tooling, the structure is optimized, the components are simplified, and the cost is reduced. The driven gear 72 and the push rod 6 are driven by the principle of a screw.

[0037] The feedback unit 4 includes a display panel 41, on which are disposed a plurality of indicator lights 411, 412, 413, 414. The indicator lights 411, 412, 413, 414 are divided into three red signal lights, namely, a high light 411, a low light 412, and a gas leakage light 413, and a green OK 414 signal light, so that the operator can receive the detection information in time and improve the adjustment efficiency.

[0038] The push rod 6 comprises a top 61, a connecting portion 62 connected to the top 61 and a sleeve 63 sleeved outside the connecting portion 62, the sleeve 63 being threadedly connected to the driven gear 72, the lower end of the positioning seat 3 being provided with a guide groove 34 for the connecting portion 62 and the sleeve 63 to be embedded and guided to slide, a compression spring 35 being provided between the connecting portion 62 and the bottom surface of the guide groove 34, the end portion of the connecting portion 62 facing the bottom surface of the guide groove 34 being exposed outside the sleeve 63, the outer peripheral surface of the end portion being provided with a convex ring 621 which is in abutment with the sleeve 63, the outer peripheral surface of the convex ring 621 is sealed and connected to the inner wall of the guide groove 34 by a sealing ring 6211, and the space where the compression spring 35 is located is connected to the air inlet nozzle 32. The push rod 6 is composed of three parts, which is convenient for installation and replacement. The top 61 and the connecting part 62 can be integrally arranged or detachably arranged. The convex ring 621 is mounted on the sleeve 63. When the sleeve 63 rises, the sleeve 63 pushes the convex ring 621 to make the connecting part 62 also rise. When the sleeve 63 descends, the connecting part 62 is reset under the action of the compression spring 35. The structure is simple and the lifting and lowering are precise, which avoids the friction between the top 61 and the needle valve seat due to rotation.

[0039] A limiting sleeve 721 is provided below the driven gear 72 and sleeved on the connecting portion 62. The limiting sleeve 721 is fixed to the connecting portion 62 by a first positioning pin 7211 radially provided therethrough. The setting of the limiting sleeve 721 can limit the rising range of the ejector rod 6. The limiting sleeve 721 and the connecting portion 62 are fixed by the first positioning pin 7211, and the structure is simple and the installation is convenient.

[0040] The top 61 is embedded in the connecting portion 62. The outer peripheral surface of the connecting portion 62 is provided with a second positioning pin 622 which penetrates radially thereof, and the second positioning pin 622 abuts against the outer peripheral surface of the top 61. The top 61 and the connecting portion 62 are detachable, which is convenient for replacement and prolongs the service life.

[0041] A bracket 8 for mounting the first driving member 2 is arranged above the positioning seat 3, and the bracket 8 includes a mounting plate 81 and a column 82, so a guide member 9 that can slide along its axial direction is sleeved on the column 82, and the height adjustment needle 1 is fixed on the guide member 9, and the first driving member 2 drives the guide member 9 to rise and fall. The first driving member 2 is a cylinder or a motor, so that the height adjustment needle 1 is more stable during movement, with higher precision, simple structure and convenient processing.

[0042] The guide member 9 comprises a guide plate 91 sleeved on the column 82 and a pressing plate 92 connected to the guide plate 91, the output portion of the first driving member 2 is connected to the guide plate 91, and the height adjustment needle 1 is passed through the pressing plate 92. The height adjustment needle 1 is fixed more stably, and the height adjustment needle 1 is prevented from falling off or shifting during use, thereby improving the height adjustment accuracy, being easy to install, and having a simple structure.

[0043] The pressing plate 92 is provided with a through hole 921, and a positioning plate 93 which can be fixed on the pressing plate 92 is provided above the through hole 921. The height adjustment needle 1 is penetrated on the positioning plate 93 and is threadedly connected with the positioning plate 93. Its end passes through the positioning plate 93 and then passes through the through hole 921 to be exposed below the through hole 921. The width of the through hole 921 is greater than the diameter of the height adjustment needle 1. The contact area is increased, so that the height adjustment needle 1 is fixed more stably. The setting of the through hole 921 has a guiding function, which facilitates the adjustment of the height adjustment needle 1.

[0044] The through hole 921 is T-shaped, which is convenient for adjustment and adaptable to carburetors 5 of different structures, has a wide range of applications, and saves costs.

[0045] like Figure 1 As shown, the first driving member 2 is supported by three columns 82, the pressing plate 923 can be controlled by the first driving member 2 to move up and down, the height adjustment needle 1 is fixed on the pressing plate 923, the air inlet nozzle 32 introduces 0.8-0.85Kgf / cm2 air pressure into the tooling, the active gear 71 can make the push rod 6 move up and down by forward and reverse rotation, the positioning seat 3 can limit the product position, and the display panel 41 has three red signal lights including a high light 411, a low light 412, and a leakage light 413, and a green OK signal light 414.

[0046] During operation, the product is mounted on the positioning seat 3, the switch is started, the first driving member 2 controls the pressing plate 923 to press down on the product to completely fix it, the driving gear 71 rotates to make the push rod 6 rise and push the needle valve seat to a suitable height, then the driving gear 71 reverses to make the push rod 6 drop and reset, after the needle valve rocker arm is adjusted too low, the low light 412 is on; the needle valve rocker arm is too high, the high light 411 is on; if the height of the needle valve seat is qualified, 0.8-0.85Kgf / cm2 of air pressure is introduced into the tooling through the air inlet nozzle 32, if the needle valve seat leaks, the leak light 413 is on, and if it is qualified, the OK light 414 is on.

[0047] like Fig. 9As described above, there is a first sensing element on the height adjustment needle 1 that can sense whether it is in contact with the needle valve rocker arm 51. After the switch is turned on, the pressure plate 923 presses down on the product to fix it completely. When the height adjustment needle 1 does not contact the tail of the needle valve rocker arm 51, the needle valve rocker arm 51 is too low and unqualified, and the low light 412 is on (as shown in Figure A); when the height adjustment needle 1 contacts the tail of the needle valve rocker arm 51 (as shown in Figure B), the push rod 6 rises to push the needle valve seat 53 and the needle valve 52 upward. When the needle valve seat 53 and the needle valve 52 are pushed to a high enough height, the tail of the needle valve rocker arm 51 has not yet dropped to a height separated from the height adjustment needle 1, the needle valve rocker arm 51 is too high and unqualified, and the high light 411 is on (as shown in Figure C); when the needle valve seat 53 and the needle valve 52 are pushed to a certain height, the tail of the needle valve rocker arm 51 drops and separates from the height adjustment needle 1 (as shown in Figure D), and the push rod 6 immediately drops and resets, and the height adjustment is completed.

[0048] like Figure 4 As described above, the sealing gasket 36 and the sealing ring 6211 form a sealed space between the tooling and the product, namely, the air inlet channel 33 (shaded area).

[0049] After the height adjustment is completed, 82.5 kpa of air pressure is introduced into the interior of the tooling, i.e., the air inlet channel 33 (the shaded area) from the air inlet nozzle 32. After maintaining the pressure for 3 seconds, if the air pressure is lower than 80.6 kpa, there is a leak, and the air leakage light 413 is on (as shown in FIG. E). If the air pressure is not lower than 80.6 kpa, there is no leak, and the OK light 414 is on (as shown in FIG. F), and the tooling is automatically reset.

[0050] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0052] The present invention is not limited to the above-mentioned specific implementation modes. A person skilled in the art may adopt other various specific implementation modes to implement the present invention based on the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. An integrated tool for adjusting the height and detecting the leak of a needle valve of a small gasoline engine carburetor, characterized in that: It includes a height adjustment needle, a first driving member for driving the height adjustment needle to rise and fall, a positioning seat located below the height adjustment needle and a feedback unit, the positioning seat is provided with a mounting cavity for accommodating the carburetor, the positioning seat is provided with a push rod, a second driving member for driving the push rod to rise and fall is provided below the positioning seat, an air intake nozzle and an air intake channel connecting the air intake nozzle and the carburetor body are provided on the positioning seat, a first sensing member is provided on the height adjustment needle, a second sensing member is provided in the air intake channel, and the first sensing member and the second sensing member are both connected to the feedback unit; the feedback unit includes a display panel, the display panel is provided with a plurality of indicator lights, and the plurality of indicator lights are divided into high light, low light, air leakage and OK signal lights.

2. The integrated tooling for adjusting the height and detecting the leak of the needle valve of a small gasoline engine carburetor according to claim 1 is characterized by: The second driving member comprises a driving gear and a driven gear meshing with each other, the driving gear is driven by a motor, one end of the push rod passes through the positioning seat and is placed in the installation cavity, and the other end is threadedly connected to the driven gear.

3. The integrated tooling for adjusting the height and detecting the leak of the needle valve of a small gasoline engine carburetor according to claim 1 is characterized by: The push rod includes a top, a connecting part connected to the top and a sleeve sleeved outside the connecting part, the sleeve is threadedly connected to the driven gear, the lower end of the positioning seat is provided with a guide groove for the connecting part and the sleeve to be embedded and guided to slide, a compression spring is provided between the connecting part and the bottom surface of the guide groove, the end of the connecting part facing the bottom surface of the guide groove is exposed outside the sleeve, the outer peripheral surface of the end is provided with a convex ring that abuts against the sleeve, the outer peripheral surface of the convex ring is sealed and connected to the inner wall of the guide groove, and the space where the compression spring is located is connected to the air inlet nozzle.

4. The integrated tooling for adjusting the height and detecting the leak of the needle valve of a carburetor of a small gasoline engine according to claim 3 is characterized by: A limiting sleeve sleeved on the connecting portion is arranged below the driven gear, and the limiting sleeve is fixed on the connecting portion by a first positioning pin penetrated along the radial direction thereof.

5. The integrated tooling for adjusting the height and detecting the leak of the needle valve of a small gasoline engine carburetor according to claim 3 or 4, characterized in that: The top is embedded in the connecting part, and a second positioning pin is provided on the outer peripheral surface of the connecting part and penetrates in the radial direction thereof, and the second positioning pin abuts against the outer peripheral surface of the top.

6. The integrated tooling for adjusting the height and detecting the leak of the needle valve of a small gasoline engine carburetor according to claim 1, 2, 3 or 4, characterized in that: A bracket for installing the first driving member is arranged above the positioning seat, and the bracket includes a mounting plate and a column, so a guide member which can slide along its axial direction is sleeved on the column, the height adjustment needle is fixed on the guide member, and the first driving member drives the guide member to rise and fall.

7. The integrated tooling for adjusting the height and detecting the leak of the needle valve of a small gasoline engine carburetor according to claim 6 is characterized by: The guide member comprises a guide plate sleeved on the column and a pressing plate connected to the guide plate. The output portion of the first driving member is connected to the guide plate, and the height adjustment needle is inserted into the pressing plate.

8. The integrated tooling for adjusting the height and detecting the leak of the needle valve of a small gasoline engine carburetor according to claim 7 is characterized by: The pressure plate is provided with a through hole, and a positioning plate which can be fixed on the pressure plate is provided above the through hole. The height adjustment needle is penetrated through the positioning plate and is threadedly connected with the positioning plate. The end portion thereof passes through the positioning plate and out of the through hole to be exposed below the through hole. The width of the through hole is greater than the diameter of the height adjustment needle.

9. The integrated tooling for adjusting the height and detecting the leak of the needle valve of a small gasoline engine carburetor according to claim 8 is characterized by: The through hole is T-shaped.

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