Adjustable pull rod mechanism

Abstract

The present invention provides an adjustable pull rod mechanism, including a support claw, an adjustable slider, a lifting pull rod, a pressure plate, a support pull rod, a bottom support plate and a positioning pull rod, wherein a support claw is installed below the support pull rod, the top is fixedly connected to the adjustable slider, the middle is connected to the bottom support plate through the positioning pull rod, a lifting pull rod is installed above the bottom support plate, the lifting pull rod is externally movably sleeved with the adjustable slider and then fixedly connected to the pressure plate, and extends out of the pressure plate. The adjustable pull rod mechanism of the present invention can achieve the change of the angle of the support pull rod and the positioning pull rod by adjusting the position of the adjustable slider, thereby achieving the adjustment of the position of the support claw, thereby improving the compatibility of the mechanism with different cylinder diameters.

Description

Technical Field

[0001] The invention belongs to the technical field of engine testing, and in particular relates to an adjustable pull rod mechanism. Background Art

[0002] The engine cylinder liner is one of the main components of the engine combustion space. During the combustion process, the cylinder liner not only bears the interactive influence of the high temperature difference on both sides of the wall, but also bears the high temperature gas pressure of dozens or even hundreds of atmospheres. At the same time, the friction, wear and lubrication state of the cylinder liner-piston ring friction pair also have a very important influence on the engine's blowby volume and oil consumption. Therefore, reducing the deformation generated during the installation of the cylinder liner has a very important influence on improving the stability of the engine's working state and service life. An adjustable pull rod mechanism uses a variety of pull rod mechanisms to achieve compatible installation and precise assembly of parts such as cylinder liners that require "pressing and pulling", thereby reducing the economic and labor costs in the process of engine performance research and development, which is of great significance to improving the success rate of the performance research and development process. Summary of the invention

[0003] In view of this, the present invention aims to propose an adjustable pull rod mechanism to solve technical problems such as installation and disassembly of parts requiring "pressing and pulling" operations such as test cylinder sleeves.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] An adjustable pull rod mechanism includes a supporting claw, an adjustable slider, a lifting pull rod, a pressure plate, a supporting pull rod, a bottom supporting plate and a positioning pull rod. The supporting claw is installed at a limited position below the supporting pull rod, and is fixedly connected to the adjustable slider at the top. The middle part is connected to the bottom supporting plate through the positioning pull rod. A lifting pull rod is installed above the bottom supporting plate. The lifting pull rod is fixedly connected to the pressure plate after being movably sleeved on the adjustable slider and extends out of the pressure plate.

[0006] Furthermore, the supporting claw is a supporting block structure with a pin hole, and one end of the supporting claw has a slope.

[0007] Furthermore, the pressure plate is a concave disc structure with a light hole in the center of the disc and four visible holes on the top surface of the pressure plate.

[0008] Furthermore, the support rod is a round rod structure, and a mounting groove is respectively provided at both ends and the middle of the support rod, and a mounting hole is provided in the middle of the mounting groove.

[0009] Furthermore, the adjustable slider includes an upper part and a lower part of an integrated structure, the upper part is a hollow cylindrical structure, three mounting surfaces are evenly distributed on the circumference of the upper part, each mounting surface is provided with a threaded hole, and the threaded hole is connected to the central through hole of the upper part, the lower part is a hollow cylindrical structure, and the outer diameter of the lower part is smaller than the outer diameter of the upper part, three support plates are evenly distributed on the circumference of the upper part, and the three support plates and the three threaded holes are spaced apart from each other, and each support plate is provided with a rivet inner hole.

[0010] Furthermore, the threaded hole is used to install a locking screw, which is a threaded rod with a handle, and the handle is a square disc-wing structure.

[0011] Furthermore, the lifting rod is a circular rod structure with a long threaded rod body at one end, two horizontal mounting planes at the end face of the rod body, three locking support planes at the middle of the rod body, the three mounting planes are spaced 120° apart, and the other end face of the lifting rod is a rounded end face.

[0012] Furthermore, the bottom support plate includes an integrated supporting part and a supporting bottom part. The supporting part is a hollow cylindrical structure with a central inner hole in the center and mounting plates spaced 120° around the periphery. The supporting bottom part has rounded corners in the circumference. Three mounting plates are evenly distributed axially on the supporting part. The mounting plates have rivet mounting holes. Each mounting plate is composed of two plate fins, and the distance between the two plate fins matches the thickness of the adjusting rod.

[0013] Compared with the prior art, the adjustable pull rod mechanism of the present invention has the following advantages:

[0014] (1) The adjustable pull rod mechanism described in the present invention can achieve the change of the angle of the support pull rod and the adjustment pull rod by adjusting the position of the adjustable slider, thereby achieving the adjustment of the position of the support claw, thereby improving the compatibility of the mechanism with different cylinder diameters.

[0015] (2) The adjustable pull rod mechanism described in the present invention can realize the flexible installation and disassembly of parts that need to be "pressed and pulled" such as the test engine cylinder liner through the principle of a threaded screw. It has the advantages of simple processing and assembly, and convenient troubleshooting. It can realize the installation and disassembly process of the cylinder liner and the engine body or cylinder block without the use of special equipment, thereby realizing the accurate installation of the test engine cylinder liner, reducing the possibility of deformation of the cylinder liner due to improper operation during the installation process, and reducing the time cost and economic cost in the process of developing the performance of the test engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1A schematic diagram of an adjustable pull rod mechanism according to an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of a supporting claw according to an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of an adjustable slider according to an embodiment of the present invention;

[0020] Figure 4 It is a front view of the adjustable slider according to an embodiment of the present invention;

[0021] Figure 5 A top view of the adjustable slider according to an embodiment of the present invention;

[0022] Figure 6 A bottom view of the adjustable slider according to an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of a lifting rod according to an embodiment of the present invention;

[0024] Figure 8 A schematic diagram of a pressure plate according to an embodiment of the present invention;

[0025] Fig. 9 A schematic diagram of a locking screw according to an embodiment of the present invention;

[0026] Fig.10 A schematic diagram of a support rod according to an embodiment of the present invention;

[0027] Fig.11 is a schematic diagram of a rivet according to an embodiment of the present invention;

[0028] Fig.12 A schematic diagram of a bottom support plate according to an embodiment of the present invention;

[0029] Fig.13 A schematic diagram of a positioning rod according to an embodiment of the present invention;

[0030] Fig.14 This is a schematic diagram of the application of the adjustable pull rod mechanism described in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1-support claw; 11-inclined surface; 12-pin hole; 2-adjustable slider; 21-threaded hole; 22-rivet inner hole; 23-support plate; 24-center through hole; 25-mounting surface; 3-lifting rod; 31-rod body; 32-locking support surface; 33-mounting plane; 34-rounded end surface; 4-pull rod nut; 5-pressure plate; 6-locking screw; 7-support rod; 71-mounting hole; 72-mounting groove; 8-rivet; 81-center hole; 82-semi-spherical surface; 9-bottom support plate; 91-mounting plate; 92-center inner hole; 93-plate fin; 94-support bottom; 10-adjusting rod. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] 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 by specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0037] An adjustable pull rod mechanism, such as Figures 1 to 14As shown, it includes a support claw 1, an adjustable slider 2, a lifting rod 3, a rod nut 4, a pressure plate 5, a locking screw 6, a support rod 7, a rivet 8, a bottom support plate 9, and a positioning rod 10. The support rod 7 is limitedly connected to the support claw 1 at the bottom, fixedly connected to the adjustable slider 2 at the top, and connected to the bottom support plate 9 in the middle through the positioning rod 10. The lifting rod 3 is installed above the bottom support plate 9. The lifting rod 3 is fixedly connected to the pressure plate 5 after the adjustable slider 2 is movably sleeved on the outside, and extends out of the pressure plate 5. The adjustable rod mechanism described in the present invention can realize the flexible installation and disassembly of the test engine cylinder liner, has the advantages of simple processing and assembly, convenient fault handling, etc., can complete the installation and disassembly process of the cylinder liner and the engine body or cylinder body without using other equipment, and can realize compatibility with cylinder liners of various cylinder diameters. The installation process of the cylinder liner can be realized by "reverse installation" of the mechanism, and the accurate disassembly and installation of the test engine cylinder liner is realized, and the possibility of cylinder liner deformation caused by improper operation during installation is reduced, saving a lot of time and economic costs.

[0038] The support claw 1 is a support block structure with a pin hole 12. One end of the support claw 1 has a bevel 11, and the pin hole 12 is used to install the rivet 8. The two are clearance-matched, and the tolerance is controlled between +0.10 and +0.15 mm. The rivet 8 is used to lock the moving parts. One end of the rivet 8 is a semi-spherical surface 82, and the other end is a center hole 81 structure. After the rivet 8 passes through the installation hole, it is inserted into the center hole 81 with a tool and then knocked to achieve the flanging deformation of the edge with the hole, thereby realizing the connection and locking between the two moving parts.

[0039] The thickness of the support claw 1 matches the thickness of the inner hole square groove of the end face of the support pull rod 7, and a clearance fit is adopted with a tolerance controlled between +0.15 and +0.20 mm. The distance from the pin hole 12 of the support claw 1 to the proximal end face is greater than the radius of the support pull rod 7. In order to effectively limit the support claw 1, the distance should be at least 3 mm greater than the radius of the pull rod 7. The support is provided by the boundary of the rivet 8 and the mounting groove 72 of the support pull rod 7, so that the support claw 1 can effectively contact the lower edge of the cylinder liner around the rivet 8.

[0040] The support rod 7 is a round rod structure, and a mounting groove 72 is respectively provided at both ends and the middle of the support rod 7, and a mounting hole 71 is provided in the middle of the mounting groove 72, and the mounting hole 71 is used to install the rivet 8. Preferably, the mounting groove 72 is a square opening groove. The three mounting grooves 72 are respectively used for clearance fit with the adjustable slider 2, the adjustment rod 10, and the outer mounting surface of the support claw 1 from top to bottom, and the tolerance of the clearance fit is controlled between +0.15 and +0.20 mm.

[0041] The adjustable slider 2 includes an upper part and a lower part of an integrated structure, wherein the upper part is a hollow cylindrical structure, and three mounting surfaces 25 are evenly distributed around the upper part, each mounting surface 25 is provided with a threaded hole 21, and the threaded hole 21 is connected to the central through hole 24 of the upper part, and the lower part is a hollow cylindrical structure, and the outer diameter of the lower part is smaller than the outer diameter of the upper part, and three support plates 23 are evenly distributed around the upper part, and the three support plates 23 and the three threaded holes 21 are spaced apart from each other, and each support plate 23 is provided with a rivet inner hole 22.

[0042] The threaded hole 21 is used to install the locking screw 6. The locking screw 6 is a threaded rod with an operating handle. The handle is a square disc-wing structure, which is convenient for manual operation. The pitch of the threaded rod matches the thread specification of the mounting surface of the adjustable slider 2. Specifically, the three mounting surfaces 25 are spaced at an angle of 120°, the pitch of the threaded hole 21 in the mounting surface 25 matches the pitch of the locking screw 6, the three support plates 23 are spaced at an angle of 120°, and the interval between the adjacent support plates 23 and the threaded hole 21 in the mounting surface 25 is 60°, that is, the three threaded holes 21 and the three support plates 23 are spaced apart from each other.

[0043] The pitch of the internal thread of the tie rod nut 4 matches the pitch of the end thread of the lifting tie rod 3. The pressure plate 5 is a circular concave disc structure with a light hole in the center of the disc. The size is clearance-matched with the outer diameter of the lifting tie rod 3, and the tolerance is controlled between +0.10 and +0.15 mm. The outer diameter of the pressure plate 5 is larger than the flange size of the cylinder sleeve. Four visual holes are provided on the top surface of the pressure plate 5 to facilitate the adjustment of the installation position of the support claw 1 during the installation process.

[0044] The lifting rod 3 is a circular rod structure, with a long threaded rod 31 at one end, two horizontal mounting planes 33 on the end face of the rod 31, three locking support surfaces 32 in the middle of the rod, and the three mounting planes 33 are spaced 120° apart. The other end face of the lifting rod 3 is a rounded end face 34, the size of which matches the size and rounded corner of the end face inner hole of the bottom support plate 9. It is recommended that the rounded corner be larger than R3 to facilitate the force-bearing area of ​​the bottom support plate 9 on the lifting rod 3.

[0045] The bottom support plate 9 includes an integrated support portion and a supporting bottom portion 94. The support portion is a hollow cylindrical structure with a central inner hole 92 in the center and mounting plates 91 at 120° intervals around the periphery. The supporting bottom portion 94 is rounded in the circumferential direction. The size of the central inner hole 92 and the internal rounded corners of the supporting bottom portion 94 are matched with the lifting rod 3, and a clearance fit is adopted, and the tolerance is controlled within +0.03 to +0.06 mm. Three mounting plates 91 are evenly distributed axially on the support portion, and the mounting plates 91 have rivet mounting holes. Each mounting plate 91 is composed of two plate fins 93, and the distance between the two plate fins 93 matches the outer thickness of the adjusting rod 10, and a clearance fit is adopted, and the tolerance is controlled within +0.15 to +0.20 mm.

[0046] The positioning rod 10 is a flat strip rod with rivet shaft holes at both ends. The thickness of the rod matches the plate fins around the bottom support plate 9, and a clearance fit is used with a tolerance controlled between +0.15 and +0.20 mm. The rivet shaft holes at both ends match the outer diameter of the rivet 8, and a clearance fit is used with a tolerance controlled between +0.10 and +0.15 mm.

[0047] A method for installing and adjusting an adjustable pull rod mechanism comprises the following steps:

[0048] 1. Place the support claw 1 into the square groove below the support rod 7, align the pin hole of the rivet 8, insert the rivet 8 into the pin hole from one end, insert the tool into the round hole at one end of the rivet 8, use the impact force to deform the end face of the rivet 8 with the inner hole, and limit and fix the two. After fixing, move the support claw 1 by hand. It should be able to swing freely and flexibly at a small angle in the square groove below the support rod 7 with the rivet as the axis. According to the above method, place the remaining two support claws 1 into the other two support rods 7. A total of three sets of parts need to be installed;

[0049] 2. Place the adjustable slider 2 into the lifting rod 3, and rotate the adjustable slider 2 so that the thread plane above it is level with the plane in the middle of the lifting rod 3. Since the planes of the two are designed to be 120° apart, the three planes of the two are parallel after alignment;

[0050] 3. Use your hand to drive the butterfly-wing handle of the locking screw 6, and screw its threaded rod into the threaded hole under the horizontal plane of the adjustable slider 2, until the threaded rod end face of the locking screw 6 contacts the horizontal plane in the middle of the lifting rod 3. No need to tighten. According to the above method, screw the other two locking screws 6 into the threaded holes under the remaining two horizontal planes of the adjustable slider 2, and contact the corresponding middle horizontal plane of the lifting rod 3. No need to tighten, just keep lightly touching.

[0051] 4. Connect the three support rods 7 components of the support claws 1 assembled in step 1 to the three support plates under the adjustable slider 2 respectively, align the support rod 7 components with the rivet 8 pin holes of the adjustable slider 2, insert the rivet 8 into the pin hole from one end, insert the tool into the round hole at one end of the rivet 8, use the impact force to deform the end face flange with the inner hole of the rivet 8, and limit and fix the two. After fixing, move the support rod 7 component by hand, and it should be able to swing freely and flexibly in the pin hole of the support plate under the adjustable slider 2 with the rivet as the axis. According to the above method, put the remaining two support rods 7 components into the pin holes of the support plates under the other two adjustable sliders 2, and check that the remaining two support rods 7 components should be able to swing freely around the rivet 8;

[0052] 5. Install the bottom support plate 9 to the corresponding end face of the lifting rod 3 component that has completed the above installation steps, rotate the bottom support plate 9 so that the three mounting plates evenly distributed around it are aligned with the three support rod 7 components respectively, and then align the rivet 8 pin hole of the adjustment rod 10 with the mounting plate pin hole around the bottom support plate 9, insert the rivet 8 into the pin hole from one end, use the tooling to insert it into the round hole at one end of the rivet 8, use the impact force to deform the end face of the rivet 8 with the inner hole, and limit and fix the two. After fixing, move the adjustment rod 10 by hand, and it should be able to swing freely and flexibly in the mounting plate pin hole around the bottom support plate with the rivet as the axis. Use the above method to connect the other two adjustment rods 10 to the mounting plate of the bottom support plate 9 respectively, and they should be able to rotate flexibly after installation;

[0053] 6. Adjust the adjustable slider 2 so that the rivet 8 pin hole in the middle square groove of the supporting rod 7 component is aligned with the pin hole of the adjusting rod 10 completed in step 5. Insert the rivet 8 into the pin hole from one end, insert the tool into the round hole at one end of the rivet 8, use the impact force to deform the end face flange with the inner hole of the rivet 8, and limit the two. Connect the other two supporting rod 7 components and the adjusting rod 10 with rivets 8 according to the above steps. After completing the above fixing work, move the adjustable slider 2 by hand to slide up and down on the lifting rod 3, and the supporting rod 7 and the adjusting rod 10 should be able to swing freely and flexibly accordingly;

[0054] 7. Adjust the position of the adjustable slider 2 on the lifting rod 3 so that the three supporting claws 1 are effectively in contact with the cylinder sleeve or the parts to be disassembled. After completing the above steps, tighten the three locking screws 6 by hand so that the end faces of the screws are pressed and fitted with the corresponding mounting plane in the middle of the lifting rod 3. Then, insert the lifting rod 3 from the bottom of the cylinder sleeve or the parts to be disassembled, and expose the other end of the lifting rod 3 from the cylinder sleeve piston to be disassembled. Use the other hand to cover the pressure plate 5 above the cylinder sleeve or the parts to be disassembled, pass the exposed end of the lifting rod 3 through the center hole of the pressure plate 5, and then use the tie rod nut 4 to screw in from the threaded rod at the exposed end of the lifting rod 3 until the tie rod nut 4 contacts the upper surface of the pressure plate 5 and gradually increases the friction. Finally, use the corresponding open-end wrench to fix the horizontal mounting surface of the exposed end of the main lifting rod 3, and use a plum wrench to twist the tie rod nut 4, and use the friction between the nut and the screw to slowly pull out the cylinder sleeve piston to be disassembled.

[0055] 8. The above is the disassembly process of the cylinder liner and the parts to be disassembled. If the cylinder liner and the parts to be installed need to be installed, it is only necessary to reverse the pressure plate 5 and the support claw 1, that is, to swap their positions, and the cylinder liner or the parts to be installed can be installed.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable pull rod mechanism, characterized in that: It includes a supporting claw, an adjustable slider, a lifting rod, a pressure plate, a supporting rod, a bottom supporting plate and a positioning rod. The supporting claw is limitedly installed below the supporting rod, and the upper part is fixedly connected to the adjustable slider. The middle part is connected to the bottom supporting plate through the positioning rod. The lifting rod is installed above the bottom supporting plate. The lifting rod is externally movably sleeved with the adjustable slider and then fixedly connected to the pressure plate, and extends out of the pressure plate. The adjustable slider includes an upper part and a lower part of an integrated structure, the upper part is a hollow cylindrical structure, and three mounting surfaces are evenly distributed on the circumference of the upper part, each mounting surface is provided with a threaded hole, and the threaded hole is connected to the central through hole of the upper part, the lower part is a hollow cylindrical structure, and the outer diameter of the lower part is smaller than the outer diameter of the upper part, and three support plates are evenly distributed on the circumference of the lower part, and the three support plates and the three threaded holes are spaced apart from each other, and each support plate is provided with a rivet inner hole.

2. The adjustable pull rod mechanism according to claim 1, characterized in that: The supporting claw is a supporting block structure with a pin hole, and one end of the supporting claw is provided with an inclined surface.

3. The adjustable pull rod mechanism according to claim 1, characterized in that: The pressure plate is a concave disc structure with a light hole in the center of the disc and four visible holes on the top surface of the pressure plate.

4. The adjustable pull rod mechanism according to claim 1, characterized in that: The support rod is a round rod structure, and a mounting groove is respectively provided at both ends and the middle of the support rod, and a mounting hole is provided in the middle of the mounting groove.

5. The adjustable pull rod mechanism according to claim 1, characterized in that: The threaded hole is used to install a locking screw, which is a threaded rod with a handle, and the handle is a square disc wing structure.

6. The adjustable pull rod mechanism according to claim 1, characterized in that: The lifting rod is a circular rod structure with a long threaded rod body at one end. The end face of the rod body is provided with two horizontal mounting planes, and the middle part of the rod body is provided with three locking support surfaces. The three mounting planes are spaced 120° apart, and the other end face of the lifting rod is a rounded end face.

7. The adjustable pull rod mechanism according to claim 1, characterized in that: The bottom support plate includes an integrated support part and a supporting bottom part. The support part is a hollow cylindrical structure with a central inner hole in the center and mounting plates at 120° intervals around the periphery. The supporting bottom part has rounded corners in the circumference. Three mounting plates are evenly distributed axially on the support part. The mounting plates have rivet mounting holes. Each mounting plate is composed of two plate fins, and the distance between the two plate fins matches the thickness of the adjustment rod.

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