Hydraulic riveting device for oil scale of lubricating oil tank

Abstract

The utility model discloses a hydraulic riveting device for a lubricating oil tank oil scale. The hydraulic riveting device comprises a lower die base, a female die, a rubber mat, a pin, a screw, a spring, a pressing rod, a guide plate and a supporting base. During hydraulic forming, the oil scale to be riveted is arranged in the female die, then the hydraulic riveting device and the oil scale are placed into a hydraulic machine workbench together, after a hydraulic machine is started, the main cylinder drives the pressing rod, and riveting of the oil scale is completed when the pressing rod reaches the maximum stroke. When the riveting device is used for riveting the lubricating oil tank oil scale, rapid one-time riveting can be achieved, due to the fact that the height of a forming face is guaranteed, key sizes such as the height and the diameter of a pier head are effectively controlled after the rivet is riveted, and the qualified standard of design patterns and riveting quality inspection can be met. One-time riveting can be achieved for riveting of a structure with a plurality of rivets arranged side by side, efficiency is high, and the one-time riveting success rate is larger than 90%.

Description

Technical Field

[0001] The utility model belongs to the technical field of riveting assembly technology, in particular to a special solid riveting radial riveting device for an oil dipstick of an aviation accessory lubricating oil tank, and is particularly suitable for a one-time riveting processing device for multiple rivets with narrow spacing. Background Art

[0002] The oil dipstick is a relatively common part type in oil container products and is widely used in the manufacturing fields of automobiles, ships, aviation equipment, etc. Its main function is to measure the volume of oil in the fuel tank container. The corresponding oil amount is read through the liquid level line formed when the oil dipstick body is immersed in the oil. At the same time, most of the connections between the oil dipstick body and the oil dipstick base are achieved through riveting process, especially the fuel tank containers commonly found in the oil circuit systems of aircraft, ships, and automobiles.

[0003] In order to ensure the installation reliability of the oil dipstick body in the current common oil dipstick structure, the number of rivets is mostly distributed at more than 2, and the rivet spacing is small. Conventional riveting methods include manual punch riveting, air rivet gun riveting, etc. The rivet heads and pier heads processed by the manual punch riveting method are prone to cuts, sinks, cracks and other mechanical damage defects. In addition, these two methods can only achieve the riveting of a single rivet, with low processing efficiency and poor positioning accuracy, resulting in slanted pier heads after riveting. The difference between the minimum height and maximum height of the slanted pier head exceeds the standard requirements, the riveting qualification rate is not high, and the product quality is reduced. Summary of the Invention

[0004] The utility model aims to provide a hydraulic riveting device for an oil dipstick of a lubricating oil tank, so as to solve the defects in the riveting process of the oil dipstick and the low efficiency of multiple riveting, improve the qualified rate and efficiency of riveting, reduce the production cost of the enterprise, improve the product quality, and make the riveting quality and size of the oil dipstick meet the technical requirements.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hydraulic riveting device for an oil dipstick of a lubricating oil tank, comprising:

[0007] Support bases, wherein the two support bases are placed in parallel and spaced apart;

[0008] A die is placed between the two support seats. The top end surface of the die is provided with a rectangular groove for mounting the oil dipstick body and a semicircular groove for mounting the outer sleeve of the oil dipstick. A hemispherical groove for accommodating the rivet head on the oil dipstick is further provided on the top end surface of the die between the rectangular groove and the semicircular groove. A rectangular groove for mounting a rubber pad is provided on each side of the hemispherical groove.

[0009] A rubber pad, the rubber pad being placed in a rectangular groove for installing the rubber pad;

[0010] A guide plate, the guide plate is located above the die, and the two ends of the guide plate are respectively connected to the top of the two support seats, and a through hole is opened on the guide plate;

[0011] A pressure rod is inserted into the through hole of the guide plate, a first limiting step is provided at the upper end of the pressure rod, a planar lower end of the pressure rod forms a rivet forming pier head, and a second limiting step is provided on the pressure rod and between the first limiting step and the rivet forming pier head;

[0012] The spring is sleeved on the pressure rod, and one of the two axial end faces of the spring is in close contact with the first limiting step of the pressure rod head, and the other end face is in close contact with the top end face of the guide plate.

[0013] Furthermore, the hydraulic riveting device for the oil dipstick of the lubricating oil tank also includes a lower die base, which serves as the base plate of the entire hydraulic riveting device and is connected to the working platform of the hydraulic device. The main body of the lower die base is a rectangular steel plate, and the support base and the bottom of the die are both installed on the lower die base.

[0014] further,

[0015] The lower die base is provided with a first pin hole and a first screw hole, wherein the first pin hole is a through hole and the first screw hole is a countersunk hole;

[0016] The bottom of the die is provided with a second pin hole and a second screw hole, wherein the second pin hole and the second screw hole are both blind holes;

[0017] The bottom of the support seat is provided with a third pin hole and a third screw hole, wherein the third pin hole and the third screw hole are both blind holes;

[0018] The die is connected to the lower die base through pins located in the first pin hole and the second pin hole and screws located in the first screw hole and the second screw hole, and the support base is connected to the lower die base through pins located in the first pin hole and the third pin hole and screws located in the first screw hole and the third screw hole.

[0019] As an option, the pin is a cylindrical pin that complies with the GB / T119-86 standard, and the screw is a hexagon socket head screw that complies with the GB / T2089-2009 standard.

[0020] As an option, a picking groove is also provided on the die and between the installation limit semicircular groove and the hemispherical groove. The picking groove runs through the two end faces in the width direction of the die, and the bottom surface of the picking groove is lower than the bottom surface of the installation limit semicircular groove.

[0021] Furthermore, a threaded blind hole is provided on the top end surface of the support seat, a threaded through hole is opened on the guide plate, and the guide plate is connected to the top of the support seat by screws screwed into the threaded through hole and the threaded blind hole.

[0022] The utility model adopts a hydraulic riveting method, and adopts a lubricating oil tank oil dipstick hydraulic riveting device and a hydraulic press to perform riveting. The oil dipstick is installed on the hydraulic riveting device, and then the oil dipstick and the hydraulic riveting device are placed together on the workbench of the hydraulic press. By starting the hydraulic press, the main cylinder of the hydraulic press slides down and drives the hydraulic riveting device to rivet the oil dipstick.

[0023] Compared with the prior art, the present invention has the following features:

[0024] (1) The hydraulic riveting device for the oil dipstick of the lubricating oil tank is relatively simple to manufacture, and the workpiece can be clamped quickly during use. The method of use is simple, which improves the operator's work efficiency;

[0025] (2) The hydraulic riveting device for the oil dipstick of the lubricating oil tank has a high positioning accuracy for the oil dipstick workpiece. During the riveting process, the oil dipstick body and the rivet are not likely to deflect and form a slanted head. The qualified rate of key dimensions such as the head height and diameter after riveting is high. Considering that the rivet quality is mainly judged by using measuring tools to measure the head height and head diameter after riveting, the pressure rod will not continue to rivet after it reaches the limit height. Therefore, the height of the rivet formed by the riveting device under the action of the hydraulic press is fixed and guaranteed by the designed forming height.

[0026] (3) Using hydraulic press to perform riveting can realize riveting multiple rivets on the same plane at one time, especially for riveting multiple rivets with narrow spacing. The efficiency and quality are greatly improved compared with the previous manual riveting and pneumatic riveting. Specifically, two hemispherical grooves are designed on the die to install semi-circular head rivets. The rivet arrangement range only needs to be smaller than the pressure head area of ​​the pressure rod. When the pressure rod moves downward to the limit, the riveting of all rivets can be completed. The number of rivets that can be riveted is determined by the area of ​​the bottom of the pressure rod and the spacing of the hemispherical grooves on the die. Therefore, it is suitable for one-time riveting processing of multiple rivets with narrow spacing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a hydraulic riveting device for an oil dipstick in an oil tank including an oil dipstick;

[0028] Figure 2 for Figure 1 Left view of;

[0029] Figure 3 for Figure 1 A top view of

[0030] Figure 4 Schematic diagram of the lower die base;

[0031] Figure 5 for Figure 4Schematic diagram of the mid-section DD;

[0032] Figure 6 for Figure 4 Schematic diagram of the middle section AA;

[0033] Figure 7 for Figure 4 Schematic diagram of the middle section CC;

[0034] Figure 8 It is the AA cross-section of the die;

[0035] Figure 9 for Figure 8 Left view of;

[0036] Figure 10 for Figure 8 A top view of

[0037] Figure 11 for Figure 10 Middle BB cross-section;

[0038] Figure 12 It is a three-dimensional diagram of the die;

[0039] Figure 13 Schematic diagram of the rubber pad;

[0040] Figure 14 for Figure 13 Left view of;

[0041] Figure 15 for Figure 13 A top view of

[0042] Figure 16 It is a schematic diagram of the pin;

[0043] Figure 17 for Figure 16 Left view of;

[0044] Figure 18 Schematic diagram of the screw;

[0045] Figure 19 for Figure 18 Right view;

[0046] Figure 20 for Figure 18 A top view of

[0047] Figure 21 It is a schematic diagram of the spring;

[0048] Figure 22 for Figure 21 Left view of;

[0049] Figure 23 It is the schematic diagram of the AA section of the compression rod;

[0050] Figure 24 for Figure 23 Left view of;

[0051] Figure 25 Schematic diagram of the guide plate;

[0052] Figure 26 for Figure 25 Schematic diagram of the middle CC section;

[0053] Figure 27 for Figure 25 Schematic diagram of the middle AA section;

[0054] Figure 28 Schematic diagram of the support seat;

[0055] Figure 29 for Figure 28 Left view of;

[0056] Figure 30 for Figure 28 A top view of

[0057] In the figure, 1-lower die base, 2-die, 3-oil dipstick, 4-rubber pad, 5-pin, 6-screw, 7-spring, 8-pressure rod, 9-guide plate, 10-support seat. DETAILED DESCRIPTION

[0058] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0059] like Figures 1 to 3 As shown in the figure, a hydraulic riveting device for an oil dipstick of an oil tank designed in the present invention includes a lower die base 1, a die 2, a rubber pad 4, a pin 5, a screw 6, a spring 7, a pressure rod 8, a guide plate 9 and a support base 10.

[0060] like Figures 4 to 7 As shown, the main body of the lower die base 1 is a rectangular steel plate, which is used as the bottom plate of the entire lubricating oil tank oil dipstick hydraulic riveting device. The middle part of the lower die base 1 is provided with hole features along the longitudinal axis for installing A8×30 pins 5 and M8×25 hexagon socket head screws 6 respectively. The hole feature for installing with the pin 5 is a through hole of Φ8, and the through hole size is an interference fit with the pin 5. The hole feature for installing with the screw 6 is a countersunk hole, and the countersunk hole size is a clearance fit with the screw 6. There are two hole features for installing the pin 5 and the screw 6 respectively, which are symmetrically distributed on the left and right sides. The hole size is consistent with the hole size of the middle part along the longitudinal axis. As shown Figure 2 As shown, the middle part of the lower die base 1 includes 7 countersunk holes and 6 through holes, which are used to install pins 5 and screws 6 respectively. The countersunk holes and through holes along the longitudinal axis in the middle are used to match 5 and screws 6 to install the die 2, and the countersunk holes and through holes symmetrically distributed on the left and right sides are used to match pins 5 and screws 6 to install the support base 10.

[0061] like Figures 8 to 12 As shown, along the longitudinal axis, the bottom of the die 2 is provided with holes for an A8×30 mounting pin 5 and an M8×25 hexagon socket head screw 6, respectively. The pin 5 and screw 6 connect to secure the die 2 to the lower die base 1. The hole for the pin 5 is a Φ8 blind hole, the size of which is an interference fit with the pin 5. The hole for the screw 6 is a threaded blind hole, the thread size of which is consistent with that of the screw 6. A hemispherical recess for the rivet head of the oil dipstick 3 and a rectangular recess for mounting a rubber gasket are provided in the center of the top of the die 2. The dimensions of the hemispherical recess are designed based on the head size of the rivet used for the oil dipstick 3. A rectangular recess for mounting the oil dipstick 3 is provided on the left side of the die 2 to prevent it from shifting during the riveting process. A semicircular recess for mounting the outer sleeve of the oil dipstick 3 is provided on the right side. A picking groove is also provided on the die 2 and between the installation limit semicircular groove and the hemispherical groove. The picking groove runs through the two end faces of the die 2 in the width direction. The bottom surface of the picking groove is lower than the bottom surface of the installation limit semicircular groove. The design of the picking groove makes it convenient for the operator to reach into the picking groove to clamp the outer sleeve of the oil dipstick 3 after the riveting process is completed, leaving enough operating space.

[0062] The rubber pad 4 is a rectangular parallelepiped resin made of polyurethane material and is used to be installed in the installation rubber pad rectangular groove in the middle of the top of the die 2. It is mainly used to increase the buffer for the oil dipstick 3 to prevent crushing. Figures 13 to 15 One side of the end of the rubber pad 4 is semicircular, and the overall outline size can be installed in the installation rubber pad rectangular groove in the middle of the top of the die 2.

[0063] Pin 5 is a cylindrical pin that complies with GB / T119-86 standard, and the size of the cylindrical pin is A8×30; Figure 16 and Figure 17As shown, pin 5 is installed in the pin hole of the lower die base 1, used to connect the lower die base 1 to the die 2 and the lower die base 1 to the support base 10. The lower die base 1 and the die 2 are connected and fixed by using two YA1.8×18×65 cylindrical pins, each inserted through the two Φ8 holes in the bottom of the lower die base 1, and then inserted into the blind hole in the bottom of the die 2. Then, three M8×25 hexagon socket head screws are inserted through the countersunk holes in the bottom of the lower die base 1, and then inserted into the threaded blind holes in the bottom of the support base 10. The screws are tightened to complete the fixation. The lower die base 1 and the support base 10 are connected and fixed by using four YA1.8×18×65 cylindrical pins, each inserted through the four Φ8 holes in the bottom of the lower die base 1, and then inserted into the blind holes in the bottom of the support base 10. Then, four M8×25 hexagon socket head screws are inserted through the countersunk holes in the bottom of the lower die base 1, and then inserted into the threaded blind holes in the bottom of the support base 10. The screws are tightened to complete the fixation.

[0064] like Figure 18 、 Figure 19 and Figure 20 , Screw 6 is a hexagon socket head screw that complies with the GB / T2089-2009 standard. The size of the cylindrical head screw is M8×25. The head of the screw 6 is provided with a hexagon socket feature for assembly with a universal wrench tool. Screw 6 is installed in the countersunk holes of the lower die base 1 and the guide plate 9, and is used to connect the lower die base 1 and the die 2, the lower die base 1 and the support base 10, and the support base 10 and the guide plate 9 respectively. The connection and fixing method of the support base 10 and the guide plate 9 is to use 4 YA1.8×18×65 cylindrical pins to pass through the 4 Φ8 holes at the bottom of the lower die base 1, and then extend into the blind hole at the bottom of the support base 10. Then, use 4 M8×25 hexagon socket head screws to pass through the countersunk holes at the bottom of the lower die base 1, and then extend into the threaded blind hole at the bottom of the support base 10. After tightening the screws, the fixation is completed.

[0065] The spring 7 is a common cylindrical helical compression spring that complies with the GB / T70-85 standard. The two ends of the spring 7 are tightened and then ground flat. The size is YA1.8×18×65. The principle for selecting the spring 7 is that the inner ring diameter is at least 0.5mm larger than the diameter of the sliding limit portion (i.e., the second limit step) of the pressure rod 8 in the hydraulic riveting device, and 5mm smaller than the diameter of the first limit step at the head of the pressure rod 8. Figure 21 and Figure 22 As shown, the spring 7 is used to be installed in the middle of the pressure rod 8, and the free length of the spring 7 is smaller than the length of the middle of the pressure rod 8.

[0066] The main body of the pressure rod 8 is a cylindrical rod made of chromium-manganese steel. The head of the pressure rod 8 is provided with a first limiting step for installing the spring 7. The size of the first limiting step is at least 5mm larger than the inner diameter of the spring 7. The middle of the pressure rod 8 is provided with a second limiting step. The flat feature at the bottom of the pressure rod 8 is used to form the rivet head. Figure 23 and Figure 24As shown, the outer circle size of the middle part of the pressure rod 8 is 10 mm larger than the outer circle size of the part where the head extends into the through hole of the guide plate 9.

[0067] like Figures 25 to 27 As shown, the main body of the guide plate 9 is a rectangular steel plate. A through-hole for mounting a pressure rod 8 is provided in the middle of the guide plate 9. The through-hole size matches the size of the sliding part of the pressure rod 8 with a small clearance. The left and right sides of the guide plate 9 are symmetrically provided with countersunk holes for mounting M8×25 hexagon socket head screws. The guide plate 9 can be mounted on the support bases 10 at the left and right ends via screws 6. A spring 7 is installed between the pressure rod 8 and the guide plate 9. Its function is to reset the spring when the hydraulic press releases the force after riveting is completed, and the pressure rod 8 moves upward. At this time, the riveted oil dipstick 3 can be removed.

[0068] like Figures 28 to 30 As shown, the bottom of the support base 10 is provided with holes for mounting an A8×30 pin 5 and an M8×25 hexagon socket head cap screw 6, respectively. The hole for mounting the pin 5 is a Φ8 blind hole with an interference fit, while the hole for mounting the screw 6 is a threaded blind hole. A threaded blind hole is provided at the top for mounting the screw 6. The top and bottom surfaces of the support base 10 are parallel, used for mounting the guide plate 9 and the lower die base 1, respectively. After assembly, the flatness of the top and bottom surfaces of the support base 10 must be maintained.

[0069] The process of riveting using the above-mentioned oil dipstick hydraulic riveting device includes the following steps:

[0070] Step 1: Place the hydraulic riveting device on the workbench of the hydraulic press through the lower die base 1;

[0071] Step 2: After the oil dipstick 3 to be riveted is assembled with the rivet, the hemispherical groove on the top of the die 2 is used as a reference, the semicircular head of the rivet is aligned with the hemispherical groove and the oil dipstick 3 is installed on the die 2 of the hydraulic riveting device;

[0072] Step 3: Adjust the position of the oil dipstick 3. Place the dipstick body of the oil dipstick 3 into the installation limit rectangular groove on the left side of the top of the die 2. At the same time, place the outer sleeve of the oil dipstick 3 into the installation limit semicircular groove on the right side of the die 2 to prevent the oil dipstick 3 from shifting during the riveting process.

[0073] Step 4: Start the hydraulic press and make the main cylinder of the hydraulic press slide down. After the main cylinder contacts the pressure rod 8 of the hydraulic riveting device, it drives the pressure rod 8 to move downward together until the bottom surface of the pressure rod 8 contacts the rivet on the oil dipstick 3 and starts riveting. When the pressure rod 8 moves down to the second limit step in the middle and reaches the upper surface of the guide plate 9, it stops. At this time, the rivet head is formed.

[0074] Step 5: Adjust the hydraulic press to move the master cylinder upward. The spring 7 installed at the pressure rod 8 will release the force and reset to push the pressure rod 8 upward. Then remove the oil dipstick 3 from the hydraulic riveting device. At this time, the riveting is completed.

[0075] Step 6: Use calipers or other measuring tools to measure the height and diameter of the rivet head after riveting to see if they meet the size requirements.

[0076] The above is only one specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A hydraulic riveting device for an oil dipstick of a lubricating oil tank, characterized in that: include: Support bases (10), wherein two support bases (10) are placed in parallel and spaced apart; A die (2) is placed between two support seats (10), and a top end surface of the die (2) is provided with a rectangular groove for mounting a ruler body of the oil dipstick (3) and a semicircular groove for mounting a outer sleeve of the oil dipstick (3). A hemispherical groove for mounting a rivet head on the oil dipstick (3) is further provided on the top end surface of the die (2) between the rectangular groove and the semicircular groove, and a rectangular groove for mounting a rubber pad is provided on each side of the hemispherical groove. A rubber pad (4), the rubber pad (4) being placed in a rectangular groove for installing the rubber pad; A guide plate (9), the guide plate (9) is located above the die (2), and both ends of the guide plate (9) are respectively connected to the tops of the two support seats (10), and a through hole is opened on the guide plate (9); A pressure rod (8), wherein the pressure rod (8) is inserted into the through hole of the guide plate (9), a first limiting step is provided at the upper end of the pressure rod (8), a rivet-forming pier head is formed in a plane at the lower end of the pressure rod (8), and a second limiting step is provided on the pressure rod (8) and between the first limiting step and the rivet-forming pier head; A spring (7) is sleeved on a pressure rod (8), and one of the two axial end faces of the spring (7) is in close contact with a first limiting step of the head of the pressure rod (8), and the other end face is in close contact with the top end face of the guide plate (9).

2. The hydraulic riveting device for the oil dipstick of a lubricating oil tank according to claim 1, characterized in that: The invention also includes a lower die base (1), which serves as the bottom plate of the entire hydraulic riveting device and is connected to the working platform of the hydraulic device. The main body of the lower die base (1) is a rectangular steel plate, and the bottom of the support base (10) and the die (2) are both installed on the lower die base (1).

3. The hydraulic riveting device for the oil dipstick of a lubricating oil tank according to claim 2, characterized in that: The lower die base (1) is provided with a first pin hole and a first screw hole, wherein the first pin hole is a through hole and the first screw hole is a countersunk hole; The bottom of the die (2) is provided with a second pin hole and a second screw hole, wherein the second pin hole and the second screw hole are both blind holes; The bottom of the support seat (10) is provided with a third pin hole and a third screw hole, wherein the third pin hole and the third screw hole are both blind holes; The die (2) is connected to the lower die base (1) via a pin (5) located in a first pin hole and a second pin hole and a screw (6) located in a first screw hole and a second screw hole, and the support base (10) is connected to the lower die base (1) via a pin (5) located in a first pin hole and a third pin hole and a screw (6) located in a first screw hole and a third screw hole.

4. The hydraulic riveting device for the oil dipstick of a lubricating oil tank according to claim 3, characterized in that: The pin (5) is a cylindrical pin that complies with the GB / T119-86 standard, and the screw (6) is a hexagon socket head screw that complies with the GB / T2089-2009 standard.

5. The hydraulic riveting device for the oil dipstick of a lubricating oil tank according to claim 1, characterized in that: A through groove for taking out is also provided on the die (2) and between the installation limiting semicircular groove and the hemispherical groove. The through groove for taking out runs through the two end faces in the width direction of the die (2). The bottom surface of the through groove for taking out is lower than the bottom surface of the installation limiting semicircular groove.

6. The hydraulic riveting device for the oil dipstick of a lubricating oil tank according to claim 1, characterized in that: The top end surface of the support seat (10) is provided with a threaded blind hole, the guide plate (9) is provided with a threaded through hole, and the guide plate (9) is connected to the top of the support seat (10) by screws (6) screwed into the threaded through hole and the threaded blind hole.

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