Connecting rod assembly

Abstract

The connecting rod assembly includes a first spherical plain bearing, a second spherical plain bearing, a length-adjustable connecting rod and a length measuring device. The length measuring device includes a main scale, a first bracket and a second bracket. The first bracket is fixedly arranged on one of the first spherical plain bearing or the second spherical plain bearing, and the second bracket is fixedly arranged on the other. One end of the main scale is fixedly arranged on one of the first bracket or the second bracket, and the other end of the main scale is movably arranged on the other of the first bracket or the second bracket. The main scale in the above-mentioned connecting rod assembly can follow the length-adjustable connecting rod to change its position in real time, and the length of the connecting rod can be directly read through the scale of the main scale, which is convenient and fast.

Description

Technical Field

[0001] The present invention relates to the field of aero-engines, and particularly to the field of connecting rod assemblies. Background Art

[0002] As an important part for driving the movement of components, the connecting rod assembly is widely used in various adjustment mechanisms of aero-engines, such as adjustable stator vanes, adjustable bleed valves and other structures. The connecting rod assembly usually consists of spherical plain bearings at both ends and a threaded adjusting rod in the middle section. To meet the usage requirements at different positions, the spherical plain bearings at both ends of the connecting rod assembly may be in a parallel or perpendicular state.

[0003] During the assembly process of aero-engines, the spherical plain bearings at both ends of the connecting rod assembly may rotate relative to each other and are not in a parallel or perpendicular state; during the adjustment process of the connecting rod, since the lengths of the two connecting rods on both sides cannot be read in real time, two operators are required to adjust them to the appropriate lengths simultaneously and then disassemble them for length measurement.

[0004] Therefore, when the existing connecting rod is installed on the compressor for adjustment, the length information of the connecting rod cannot be obtained in real time, and it needs to be disassembled for length measurement after being adjusted to the appropriate length; in addition, the two planes at both ends cannot be controlled during the adjustment process, and the two planes may not be parallel during the locking process. Summary of the Invention

[0005] An object of the present invention is to provide a connecting rod assembly that can read the length of the connecting rod in real time during the adjustment process of the connecting rod length.

[0006] The connecting rod assembly for achieving the above object includes a first spherical plain bearing, a second spherical plain bearing and an adjustable-length connecting rod, and the first spherical plain bearing and the second spherical plain bearing are arranged at both ends of the adjustable-length connecting rod. The connecting rod assembly further includes a length measuring device, and the length measuring device includes a main scale, a first bracket and a second bracket. The first bracket is fixedly arranged on one of the first spherical plain bearing or the second spherical plain bearing, the second bracket is fixedly arranged on the other, one end of the main scale is fixedly arranged on one of the first bracket or the second bracket, and the other end of the main scale is movably arranged on the other of the first bracket or the second bracket.

[0007] In one or more embodiments, the first bracket or the second bracket movably connected to the main scale includes a sliding groove, and the main scale is slidably arranged in the sliding groove.

[0008] In one or more embodiments, the first bracket or the second bracket movably connected to the main scale further includes a vernier caliper, the vernier caliper is arranged on the outer surface of the sliding groove, the scale on the vernier caliper faces the direction of the main scale and can be aligned with the scale of the main scale.

[0009] In one or more embodiments, the first bracket is welded to one of the first spherical plain bearing or the second spherical plain bearing, and the second bracket is welded to the other of the first spherical plain bearing or the second spherical plain bearing.

[0010] In one or more embodiments, the length-adjustable connecting rod is a double-threaded rod, with a left-handed thread on one side and a right-handed thread on the other side of the double-threaded rod.

[0011] The first spherical plain bearing includes a first threaded hole, and the second spherical plain bearing includes a second threaded hole. The first threaded hole and the second threaded hole are respectively threadedly connected to the ends of the double-threaded rod and fixed by lock nuts.

[0012] In one or more embodiments, the length of the main scale is adjustable.

[0013] During the adjustment of the length of the connecting rod, the above-mentioned connecting rod assembly can change along with the length of the connecting rod through the main scale, and the length of the connecting rod can be read in real time, which is convenient and simple to use. In addition, by means of the first bracket and the second bracket fixedly arranged on the first spherical plain bearing and the second spherical plain bearing, it is also possible to prevent the first spherical plain bearing and the second spherical plain bearing from rotating during the length adjustment process, and always ensure that the two end planes are parallel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above-mentioned and other features, properties and advantages of the present invention will become more obvious through the following description in conjunction with the drawings and embodiments, wherein:

[0015] Figure 1 is a schematic diagram of an embodiment of the connecting rod assembly;

[0016] Figure 2 is a schematic diagram of an embodiment of the first spherical plain bearing.

[0017] DESCRIPTION OF THE REFERENCE NUMERALS

[0018] 1 First spherical plain bearing

[0019] 2 Lock nut

[0020] 3 Length-adjustable connecting rod

[0021] 5 Second spherical plain bearing

[0022] 11 Vernier scale

[0023] 12 First bracket

[0024] 51 Main scale

[0025] 52 Second bracket

[0026] 13 First threaded hole

[0027] 121 chute Specific embodiments

[0028] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention is obviously capable of being implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment. It should be noted that these and subsequent other drawings are only examples, and they are not drawn under the condition of equal proportion, and should not be used to limit the actual protection scope required by the present invention.

[0029] Refer to Figure 1 As shown, the connecting rod assembly includes a first spherical plain bearing 1, a second spherical plain bearing 5, and an adjustable-length connecting rod 3. The first spherical plain bearing 1 and the second spherical plain bearing 5 are provided at both ends of the adjustable-length connecting rod 3.

[0030] In one embodiment, the adjustable-length connecting rod 3 is a double-threaded rod. One side of the double-threaded rod is a left-handed thread, and the other side is a right-handed thread. The first spherical plain bearing 1 includes a first threaded hole 13, and the second spherical plain bearing 5 includes a second threaded hole. The first threaded hole 13 and the second threaded hole are respectively threadedly connected to the ends of the double-threaded rod and fixed by a lock nut 2. When the double-threaded rod is rotated, the left and right threads at both ends of the double-threaded rod rotate simultaneously. Thus, the first spherical plain bearing 1 and the second spherical plain bearing 5 move outward or move closer inward simultaneously through the cooperation of the threaded holes and the double-threaded rod, realizing the adjustment of the overall length of the connecting rod assembly.

[0031] In order to timely measure the overall length of the connecting rod assembly, the connecting rod assembly further includes a length measuring device. The length measuring device includes a main scale 51, a first bracket 12, and a second bracket 52. The first bracket 12 is fixedly provided on one of the first spherical plain bearing 1 or the second spherical plain bearing 5, and the second bracket 52 is fixedly provided on the other of the first spherical plain bearing 1 or the second spherical plain bearing 5. For example, in Figure 1 the shown embodiment, the first bracket 12 is fixedly provided on the first spherical plain bearing 1, the second bracket 52 is fixedly provided on the second spherical plain bearing 5, one end of the main scale 51 is fixedly provided on the second bracket 52 by means of bolts or the like, and the other end is movably engaged with the first bracket 12.

[0032] In one embodiment, the first bracket 12 includes a chute 121, and the main scale 51 is slidably provided in the chute 121.

[0033] In one embodiment, the first bracket 12 is welded to one of the first spherical plain bearing 1 or the second spherical plain bearing 5, and the second bracket 52 is welded to the other of the first spherical plain bearing 1 or the second spherical plain bearing 5. The fixation of the first bracket 12 and the second bracket 52 includes but is not limited to the above embodiments. For example, it can be fixed by threading or snap ring fixation, etc., as long as it can be fixed on the first spherical plain bearing 1 and the second spherical plain bearing 5 and can move together with the first spherical plain bearing 1 and the second spherical plain bearing 5. By directly fixing the first bracket 12 and the second bracket 52 on the first spherical plain bearing 1 and the second spherical plain bearing 5, the spherical plain bearings at both ends can be restricted to a certain extent from rotating relative to each other when in a parallel or perpendicular state during the rotation of the connecting rod, thus solving the problem that the planes at both ends are prone to rotation during the length change process.

[0034] When the length of the connecting rod assembly changes, for example, when the first spherical plain bearing 1 and the second spherical plain bearing 5 move outward along the axis simultaneously, the first bracket 12 and the second bracket 52 also move together. One end of the main scale 51 is fixed to the second bracket 52, and the other end slides in the chute 121.

[0035] When the connecting rod assembly is at its minimum size, the main scale 51 is set to the initial scale at the fixed connection of the second bracket 52, and the value of the main scale 51 between the first bracket 12 and the second bracket 52 is the length of the connecting rod assembly. When the connecting rod extends and is adjusted to the appropriate length, the relative position is maintained unchanged by tightening the locking nuts 2 on both sides. When the other end of the main scale 51 slides in the chute, the length after the connecting rod extends is identified by observing the scale value on the main scale 51.

[0036] By providing the main scale 51, the length information of the connecting rod can be obtained in real time when the connecting rod assembly is adjusted on the compressor, without the need to disassemble it for length measurement after adjusting to the appropriate length, thus effectively improving the measurement efficiency. In addition, by fixedly providing the first bracket 12 and the second bracket 52 on the first spherical plain bearing 1 and the second spherical plain bearing 5, the first spherical plain bearing 1 and the second spherical plain bearing 5 can also be prevented from rotating during the length adjustment process, always ensuring that the planes at both ends are parallel.

[0037] Preferably, in order to improve the measurement accuracy. The first bracket 12 or the second bracket 52 movably connected to the main scale further includes a vernier caliper 11. The vernier caliper 11 is provided on the outer surface of the chute 121, and the scale on the vernier caliper 11 faces the direction of the main scale 51 and can be aligned with the scale of the main scale 1. As Figure 1 shown, the vernier caliper 11 is located on the outer surface of the chute 121 of the first bracket 12. When the main scale 51 moves in the chute 121, the main reading is read through the main scale 51. Subsequently, the vernier reading is read through the vernier caliper 11. The reading method of the vernier caliper 11 will not be elaborated here.

[0038] By setting a vernier caliper, the measurement accuracy can be further improved, and the connecting rod length can be obtained in real time during the adjustment process, making the adjustment process more targeted.

[0039] To further increase the measurement range, the length of the main scale 51 is adjustable. In one embodiment, the main scale 51 has a nested scale structure. The outer layer scale located on the outside shows the first layer of graduations, and the inner layer scale located on the inside shows the second layer of graduations on the basis of the first layer of graduations. The inner layer scale can move telescopically inside the outer layer scale. When the length of the connecting rod assembly is too long and the length of the outer layer scale is insufficient, the inner layer scale can be extended to increase the measurement range.

[0040] The following will be combined with Figure 1 to illustrate the working process of the connecting rod assembly.

[0041] After installing the first spherical plain bearing 1 and the second spherical plain bearing 5 on the length-adjustable connecting rod 3, rotate the length-adjustable connecting rod 3 to realize the telescoping of the connecting rod. At this time, the two spherical plain bearings are fixed by the first bracket 12 and the second bracket 52 on the two spherical plain bearings and will not rotate relative to each other.

[0042] The main scale 51 moves in the chute 121 of the first bracket 12. By observing the relative position change of the graduations on the main scale 51 and the vernier caliper 11, the change in the connecting rod length can be read in real time. When the length of the connecting rod assembly is of the appropriate size, tighten the locking nuts 2 on both sides to keep the relative positions of the first spherical plain bearing 1 and the second spherical plain bearing 5 unchanged.

[0043] By adding a scale between the first spherical plain bearing 1 and the second spherical plain bearing 5, the above-mentioned connecting rod assembly can read the current connecting rod length in real time through the scale, which is convenient and simple. At the same time, it effectively restricts the two spherical plain bearings at both ends from being in a parallel or perpendicular state and not rotating relative to each other.

[0044] Although the present invention is disclosed above with preferred embodiments, it is not used to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and decoration made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. Connecting rod assembly, comprising a first spherical plain bearing, a second spherical plain bearing and an adjustable-length connecting rod, wherein the first spherical plain bearing and the second spherical plain bearing are arranged at two ends of the adjustable-length connecting rod, It is characterized in that, The connecting rod assembly further comprises: A length measuring device, the length measuring device comprising a main scale, a first bracket and a second bracket, the first bracket being fixedly arranged on one of the first spherical plain bearing or the second spherical plain bearing, the second bracket being fixedly arranged on the other, one end of the main scale being fixedly arranged on one of the first bracket or the second bracket, and the other end of the main scale being movably arranged on the other of the first bracket or the second bracket.

2. The connecting rod assembly according to claim 1, characterized in that, The first bracket or the second bracket movably connected to the main scale comprises a sliding groove, and the main scale is slidably arranged in the sliding groove.

3. The connecting rod assembly according to claim 2, wherein, The first bracket or the second bracket movably connected to the main scale further comprises a vernier caliper, the vernier caliper being arranged on the outer surface of the sliding groove, and the scale on the vernier caliper facing the direction of the main scale and being capable of aligning with the scale of the main scale.

4. The connecting rod assembly according to claim 2, characterized in that, The first bracket is welded to one of the first spherical plain bearing or the second spherical plain bearing, The second bracket is welded to the other of the first spherical plain bearing or the second spherical plain bearing.

5. The connecting rod assembly according to claim 1, characterized in that, The adjustable-length connecting rod is a double-threaded rod, with a left-handed thread on one side and a right-handed thread on the other side of the double-threaded rod, The first spherical plain bearing comprises a first threaded hole, the second spherical plain bearing comprises a second threaded hole, and the first threaded hole and the second threaded hole are respectively threadedly connected to the ends of the double-threaded rod and fixed by lock nuts.

6. The connecting rod assembly according to claim 1, characterized in that, The length of the main scale is adjustable.

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