Fine adjustment butt joint locking device

Abstract

The utility model relates to a fine adjustment butt joint locking device, and relates to the field of precise instruments. The technical scheme comprises an objective lens which is fixedly installed at a first end in an installation cylinder; the focusing field lens is adjustably mounted at the second end in the mounting cylinder, the first end of the focusing field lens is provided with an external thread matched with the internal thread part of the mounting cylinder, and the middle end of the focusing field lens is provided with a sliding convex ring in sliding connection with the inner sliding cavity of the mounting cylinder; the end face of the first end of the tightening ring abuts against the end face of the second end of the mounting cylinder, and the tightening ring is provided with an internal thread matched with the external thread of the second end of the focusing field lens; the locking sleeve is arranged on the periphery of the tightening ring in a sleeving mode, the first end of the locking sleeve is provided with internal threads matched with the external threads of the second end of the outer portion of the installation cylinder, and the end face of the second end of the locking sleeve abuts against the end face of the second end of the tightening ring. Under the condition, after stepless focusing of the focusing field lens is completed, the whole device reaches a self-locking stable state through tightening of the tightening ring and locking of the locking sleeve.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of precision instrument, especially a kind of fine adjustment butt joint locking device. BACKGROUND

[0002] In the field of precision instrument, stepless fine adjustment and locking device as the core function unit for realizing high-precision positioning, adjustment and stability, its performance directly determines the precision and reliability of system, and is widely used in optical imaging, precision machining, electronic measurement and medical equipment and other scenes with strict positioning accuracy requirements.For example, fine calibration of telescope objective focal length, nanometer positioning adjustment of precision machine tool cutter and micro-displacement control of optical assembly in medical detection equipment, all rely on such device to realize accurate control.

[0003] In prior art, conventional stepless fine adjustment mechanism adopts screw transmission mode, and its locking scheme is usually through locking screw ring and taper end set screw cooperation, and after completing adjustment, screw is used to tighten screw thread to limit rotation. However, this scheme has significant defects: on the one hand, rigid tightening of set screw can easily cause local deformation or even damage of screw thread, affecting the repeat positioning accuracy of adjustment mechanism; on the other hand, when the device bears external rotary load (whether clockwise or counterclockwise direction), screw pair is easy to loosen due to uneven stress, which causes the calibrated position to deviate, seriously affecting the stability and working performance of instrument. Therefore, developing a butt joint device with high adjustment stability and capable of realizing mechanical self-locking has become a key requirement to solve the bottleneck of prior art. SUMMARY

[0004] The utility model aims at providing a kind of fine adjustment butt joint locking device to solve the problems existing in the prior art.

[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0006] A kind of fine adjustment butt joint locking device, including installation cylinder, the fine adjustment butt joint locking device further includes:

[0007] Objective, which is fixedly installed in the inside first end of the installation cylinder;

[0008] Focusing field mirror, which is adjustably installed in the inside second end of the installation cylinder, has outer thread matched with the inner thread part of the installation cylinder at its first end, and has sliding protruding ring slidably connected with the inner sliding cavity of the installation cylinder at its end;

[0009] And tight ring, the end face of its first end is abutted with the end face of the second end of the installation cylinder, it is threadedly connected to the second end outer periphery of the focusing field mirror, and has inner thread matched with the outer thread of the second end of the focusing field mirror;And

[0010] a locking sleeve, sleeved on the outer periphery of the clamping ring, having an inner thread at a first end matched with an outer thread of the second end of the mounting cylinder, and an end face at a second end matched with an end face of the second end of the clamping ring.

[0011] In a possible implementation, the first end and the second end of the focusing field lens have opposite screw directions, the inner thread of the clamping ring has the same screw direction as the outer thread of the second end of the focusing field lens, the inner thread of the first end of the locking sleeve has the same screw direction as the outer thread of the second end of the focusing field lens, the outer thread of the second end of the mounting cylinder has the same screw direction as the outer thread of the second end of the focusing field lens, and the inner thread part of the mounting cylinder has the same screw direction as the outer thread of the first end of the focusing field lens.

[0012] In a possible implementation, the outer thread of the first end of the focusing field lens is right-handed, the outer thread of the second end of the focusing field lens is left-handed, the inner thread of the clamping ring is left-handed, the inner thread of the first end of the locking sleeve is left-handed, the outer thread of the second end of the mounting cylinder is left-handed, and the inner thread part of the mounting cylinder is right-handed.

[0013] In a possible implementation, the outer thread of the first end of the focusing field lens is left-handed, the outer thread of the second end of the focusing field lens is right-handed, the inner thread of the clamping ring is right-handed, the inner thread of the first end of the locking sleeve is right-handed, the outer thread of the second end of the mounting cylinder is right-handed, and the inner thread part of the mounting cylinder is left-handed.

[0014] In a possible implementation, the outer threads of the first end and the second end of the focusing field lens are right-handed differential threads, the pitch of the outer thread of the first end is greater than that of the second end, the inner thread of the clamping ring is right-handed and has the same pitch as the outer thread of the second end of the focusing field lens, the inner thread part of the mounting cylinder is right-handed and has the same pitch as the outer thread of the first end of the focusing field lens, the inner thread of the first end of the locking sleeve is left-handed, and the outer thread of the second end of the mounting cylinder is left-handed.

[0015] In a possible implementation, the outer threads of the first end and the second end of the focusing field lens are right-handed differential threads, the pitch of the outer thread of the first end is smaller than that of the second end, the inner thread of the clamping ring is right-handed and has the same pitch as the outer thread of the second end of the focusing field lens, the inner thread part of the mounting cylinder is right-handed and has the same pitch as the outer thread of the first end of the focusing field lens, the inner thread of the first end of the locking sleeve is right-handed, and the outer thread of the second end of the mounting cylinder is right-handed.

[0016] In a possible implementation, the outer threads of the first end and the second end of the focusing field lens are left-handed differential threads, the pitch of the first end of the focusing field lens is greater than that of the second end, the inner thread of the clamping ring is left-handed thread, and the pitch of the inner thread is the same as that of the outer thread of the second end of the focusing field lens, the inner threaded part of the mounting cylinder is left-handed thread, and the pitch of the inner thread is the same as that of the outer thread of the first end of the focusing field lens, the inner thread of the first end of the locking sleeve is right-handed thread, and the outer thread of the second end of the mounting cylinder is right-handed thread.

[0017] In a possible implementation, the outer threads of the first end and the second end of the focusing field lens are left-handed differential threads, the pitch of the first end of the focusing field lens is greater than that of the second end, the inner thread of the clamping ring is left-handed thread, and the pitch of the inner thread is the same as that of the outer thread of the second end of the focusing field lens, the inner threaded part of the mounting cylinder is left-handed thread, and the pitch of the inner thread is the same as that of the outer thread of the first end of the focusing field lens, the inner thread of the first end of the locking sleeve is left-handed thread, and the outer thread of the second end of the mounting cylinder is left-handed thread.

[0018] In a possible implementation, the objective lens, the mounting cylinder, the focusing field lens, the clamping ring, and the locking sleeve are coaxially arranged.

[0019] The technical scheme provided by the utility model has at least the following beneficial effects:

[0020] The technical scheme includes an objective lens, which is fixedly installed at the inner first end of the mounting cylinder; a focusing field lens, which is adjustably installed at the inner second end of the mounting cylinder, has outer threads matched with the inner threaded part of the mounting cylinder at the first end, and has a sliding protruding ring slidably connected with the inner sliding cavity of the mounting cylinder at the second end; a clamping ring, which has an end face abutting against the end face of the second end of the mounting cylinder, is threadedly connected to the outer periphery of the second end of the focusing field lens, and has inner threads matched with the outer threads of the second end of the focusing field lens; and a locking sleeve, which is sleeved on the outer periphery of the clamping ring, has inner threads matched with the outer threads of the outer second end of the mounting cylinder at the first end, and has an end face abutting against the end face of the second end of the clamping ring. In this case, after the non-stop focusing of the focusing field lens is completed, the clamping ring is clamped, and then the locking sleeve is locked, so that the whole device reaches a self-locking stable state. The device has the advantages of simplicity, high durability, wide application range, easy processing, and high adjustment reliability. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the utility model, constitute part of the description, and are used to explain the utility model together with embodiments of the utility model, and do not constitute limitation on the utility model.

[0022] Figure 1The structure diagram of the fine adjustment butt joint locking device is shown.

[0023] In the figure: 1, objective lens; 2, mounting cylinder; 21, internal thread part; 22, internal sliding cavity; 3, focusing field mirror; 31, sliding convex ring; 4, clamping ring; 5, locking sleeve. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] In the description below, the words "front", "back", "left", "right", "up" and "down" refer to the directions in the drawings of the present application specification, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from a particular component. In addition, the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application specification, the meaning of "multiple" is two or more.

[0026] The present application will be further described below in conjunction with the drawings and embodiments.

[0027] Figure 1 The structure diagram of the fine adjustment butt joint locking device is shown. The structure diagram of the fine adjustment butt joint locking device is shown. In the figure: 1, objective lens; 2, mounting cylinder; 21, internal thread part; 22, internal sliding cavity; 3, focusing field mirror; 31, sliding convex ring; 4, clamping ring; 5, locking sleeve.

[0028] In the embodiment of the present application, the focusing field lens is adjustably installed at the second end inside the mounting cylinder, the first end of which can be axially displaced by rotation through matching of the external thread with the internal thread of the mounting cylinder, the sliding protrusion ring at the middle part is in sliding connection with the internal sliding cavity of the mounting cylinder, ensuring the stability of the focusing field lens during movement. The first end of the clamping ring is in abutment with the end face of the second end of the mounting cylinder, and is in threaded connection with the external thread of the second end of the focusing field lens, so that the focusing field lens can be fixed at the appropriate position after adjustment. The locking sleeve is sleeved on the external periphery of the clamping ring, and is in threaded connection with the external second end of the mounting cylinder, so as to further compress the clamping ring and realize reliable locking of the whole device, thereby ensuring the position stability of each component during use and jointly constructing a precise optical mechanical structure with adjustment and locking functions.

[0029] In some embodiments, the rotation directions of the external threads of the first end and the second end of the focusing field lens 3 are opposite, the rotation direction of the internal thread of the clamping ring 4 is the same as that of the external thread of the second end of the focusing field lens 3, the rotation direction of the internal thread of the first end of the locking sleeve 5 is the same as that of the external thread of the second end of the focusing field lens 3, the rotation direction of the external thread of the external second end of the mounting cylinder 2 is the same as that of the external thread of the second end of the focusing field lens 3, and the rotation direction of the internal thread part 21 of the mounting cylinder 2 is the same as that of the external thread of the first end of the focusing field lens 3.

[0030] In one example, the external thread of the first end of the focusing field lens 3 is right-handed thread, the external thread of the second end of the focusing field lens 3 is left-handed thread, the internal thread of the clamping ring 4 is left-handed thread, the internal thread of the first end of the locking sleeve 5 is left-handed thread, the external thread of the external second end of the mounting cylinder 2 is left-handed thread, and the internal thread part 21 of the mounting cylinder 2 is right-handed thread.

[0031] In another example, the external thread of the first end of the focusing field lens 3 is left-handed thread, the external thread of the second end of the focusing field lens 3 is right-handed thread, the internal thread of the clamping ring 4 is right-handed thread, the internal thread of the first end of the locking sleeve 5 is right-handed thread, the external thread of the external second end of the mounting cylinder 2 is right-handed thread, and the internal thread part 21 of the mounting cylinder 2 is left-handed thread.

[0032] In the embodiment of the present application, when the focusing field lens is rotated, the two ends thereof move differently due to different rotation directions, and in cooperation with the threads of the mounting cylinder and other components, a unique movement is generated. For example, in the first example, the first end of the focusing field lens is right-handed, and is in cooperation with the internal thread part of the mounting cylinder to rotate forward or backward; the second end is left-handed, and is in cooperation with the clamping ring, the locking sleeve and the external thread of the mounting cylinder. In this way, by rotating the focusing field lens, accurate axial position adjustment can be achieved, and after adjustment, the position of the focusing field lens is stabilized by the clamping ring and the locking sleeve which are in the same rotation direction as the second end of the focusing field lens. The second example is the same, except that the rotation directions are opposite. Through this design, the requirements for high-precision adjustment and reliable fixation of the fine adjustment docking locking device are met.

[0033] In some embodiments, the external threads of the first and second ends of the focusing field lens 3 are right-handed differential threads, the pitch of the first end of the focusing field lens 3 is greater than the second end, the internal threads of the retainer 4 are right-handed threads and have the same pitch as the external threads of the second end of the focusing field lens 3, the internal threaded portion 21 of the mounting cylinder 2 is right-handed threads and has the same pitch as the external threads of the first end of the focusing field lens 3, the internal threads of the first end of the locking sleeve 5 are left-handed threads, and the external threads of the external second end of the mounting cylinder 2 are left-handed threads.

[0034] In some embodiments, the external threads of the first and second ends of the focusing field lens 3 are right-handed differential threads, the pitch of the first end of the focusing field lens 3 is less than the second end, the internal threads of the retainer 4 are right-handed threads and have the same pitch as the external threads of the second end of the focusing field lens 3, the internal threaded portion 21 of the mounting cylinder 2 is right-handed threads and has the same pitch as the external threads of the first end of the focusing field lens 3, the internal threads of the first end of the locking sleeve 5 are right-handed threads, and the external threads of the external second end of the mounting cylinder 2 are right-handed threads.

[0035] In some embodiments, the external threads of the first and second ends of the focusing field lens 3 are left-handed differential threads, the pitch of the first end of the focusing field lens 3 is greater than the second end, the internal threads of the retainer 4 are left-handed threads and have the same pitch as the external threads of the second end of the focusing field lens 3, the internal threaded portion 21 of the mounting cylinder 2 is left-handed threads and has the same pitch as the external threads of the first end of the focusing field lens 3, the internal threads of the first end of the locking sleeve 5 are right-handed threads, and the external threads of the external second end of the mounting cylinder 2 are right-handed threads.

[0036] In some embodiments, the external threads of the first and second ends of the focusing field lens 3 are left-handed differential threads, the pitch of the first end of the focusing field lens 3 is less than the second end, the internal threads of the retainer 4 are left-handed threads and have the same pitch as the external threads of the second end of the focusing field lens 3, the internal threaded portion 21 of the mounting cylinder 2 is left-handed threads and has the same pitch as the external threads of the first end of the focusing field lens 3, the internal threads of the first end of the locking sleeve 5 are left-handed threads, and the external threads of the external second end of the mounting cylinder 2 are left-handed threads.

[0037] In the embodiment of the application, differential threads are used at both ends of the focusing field mirror, and precise adjustment is achieved by thread cooperation with various components through the difference in thread pitch. Taking the case where the right-handed thread has a larger first-end thread pitch than a second-end thread pitch as an example, when the focusing field mirror is rotated, the first end moves a larger distance relative to the mounting cylinder than the second end due to cooperation with the thread part in the mounting cylinder and the thread of the clamping ring, thereby generating differential displacement and achieving fine adjustment. After adjustment, the clamping ring is used to stabilize the position, and then the locking sleeve is locked by cooperating with the outer thread of the mounting cylinder. When the first-end thread pitch is smaller than the second-end thread pitch or the thread rotation direction is left-handed, the principle is similar, except that the movement direction is changed. This diversified design can accurately control the axial position of the focusing field mirror according to different scene requirements, and meets the high-precision requirement of the fine adjustment butt joint locking device.

[0038] It is worth mentioning that the objective lens 1, the focusing field mirror 3, the clamping ring 4, and the locking sleeve 5 are coaxially arranged.

[0039] Next, the working principle of the fine adjustment butt joint locking device in the embodiment of the application is described.

[0040] If the focusing field mirror 3 is rotated clockwise, the mounting cylinder 2 and the clamping ring 4 are in a state of moving in opposite directions. When the mounting cylinder 2 and the clamping ring 4 are in a clamped state, they cannot move in opposite directions, so the device is in a self-locking state when the focusing field mirror 3 moves clockwise.

[0041] If the focusing field mirror 3 is rotated counterclockwise, the mounting cylinder 2 and the clamping ring 4 are in a state of moving in opposite directions. The friction between the focusing field mirror 3 and the clamping ring 4 will drive the clamping ring 4 to rotate counterclockwise, and the friction between the clamping ring 4 and the locking sleeve 5 will drive the locking sleeve 5 to rotate counterclockwise. However, the counterclockwise rotation direction of the locking sleeve 5 is the same as the locking direction, so it cannot rotate counterclockwise and thus cannot loosen the locking sleeve 5. Therefore, the clamping ring 4 and the mounting cylinder 2 cannot move in opposite directions, and the entire device is in a self-locking stable state.

[0042] In conclusion, the technical scheme comprises an objective lens fixedly installed at the first end inside the installation cylinder, a focusing field mirror adjustably installed at the second end inside the installation cylinder, the first end of which has external threads matched with the internal threads of the installation cylinder, the end of which has a sliding convex ring slidably connected with the internal sliding cavity of the installation cylinder, a tight ring with the end face of the first end abutting against the end face of the second end of the installation cylinder, the second end of which is threadedly connected with the external periphery of the focusing field mirror, and has internal threads matched with the external threads of the second end of the focusing field mirror, and a locking sleeve sleeved on the external periphery of the tight ring, the first end of which has internal threads matched with the external threads of the second end of the installation cylinder, and the end face of the second end of which abuts against the end face of the second end of the tight ring. In this case, when the non-stop focusing of the focusing field mirror is completed, the tight ring is tightened, and then the locking sleeve is locked, so that the whole device is in a self-locking stable state, and the device has the advantages of simplicity, high durability, wide application range, easy processing and high adjustment reliability.

[0043] In the embodiments disclosed in the present application, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, "connecting" can be fixedly connected, or detachably connected, or integrally connected. "Connecting" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present application can be understood according to specific circumstances.

[0044] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, some improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A fine-tuning docking and locking device, characterized in that, Including the mounting cylinder (2), the fine-tuning docking locking device further includes: Objective lens (1), which is fixedly installed inside the first end of the mounting tube (2); A focusing field lens (3) is adjustablely mounted inside the second end of the mounting cylinder (2). Its first end has an external thread that matches the internal thread (21) of the mounting cylinder (2), and its middle end has a sliding protrusion ring (31) that is slidably connected to the inner sliding cavity (22) of the mounting cylinder (2). The first end face of the tightening ring (4) abuts against the second end face of the mounting cylinder (2), and its thread is connected to the outer periphery of the second end of the focusing field lens (3), having an internal thread that matches the external thread of the second end of the focusing field lens (3); and The locking sleeve (5) is fitted around the outer periphery of the tightening ring (4). Its first end has an internal thread that matches the external thread of the second end of the mounting cylinder (2), and the end face of its second end abuts against the end face of the second end of the tightening ring (4).

2. The fine-tuning docking and locking device according to claim 1, characterized in that, The external threads of the first and second ends of the focusing field lens (3) are opposite in direction. The internal thread of the tightening ring (4) is the same as the external thread of the second end of the focusing field lens (3). The internal thread of the first end of the locking sleeve (5) is the same as the external thread of the second end of the focusing field lens (3). The external thread of the second end of the mounting cylinder (2) is the same as the external thread of the second end of the focusing field lens (3). The internal thread (21) of the mounting cylinder (2) is the same as the external thread of the first end of the focusing field lens (3).

3. The fine-tuning docking and locking device according to claim 2, characterized in that, The external thread at the first end of the focusing field lens (3) is a right-hand thread, the external thread at the second end of the focusing field lens (3) is a left-hand thread, the internal thread of the tightening ring (4) is a left-hand thread, the internal thread at the first end of the locking sleeve (5) is a left-hand thread, the external thread at the second end of the outer side of the mounting cylinder (2) is a left-hand thread, and the internal thread (21) of the mounting cylinder (2) is a right-hand thread.

4. The fine-tuning docking and locking device according to claim 2, characterized in that, The external thread at the first end of the focusing field lens (3) is a left-hand thread, the external thread at the second end of the focusing field lens (3) is a right-hand thread, the internal thread of the tightening ring (4) is a right-hand thread, the internal thread at the first end of the locking sleeve (5) is a right-hand thread, the external thread at the second end of the outer side of the mounting cylinder (2) is a right-hand thread, and the internal thread (21) of the mounting cylinder (2) is a left-hand thread.

5. The fine-tuning docking and locking device according to claim 1, characterized in that, The external threads of the first and second ends of the focusing field lens (3) are right-hand differential threads, and the pitch of the first end of the focusing field lens (3) is greater than that of the second end. The internal thread of the tightening ring (4) is a right-hand thread and has the same pitch as the external thread of the second end of the focusing field lens (3). The internal thread (21) of the mounting cylinder (2) is a right-hand thread and has the same pitch as the external thread of the first end of the focusing field lens (3). The internal thread of the first end of the locking sleeve (5) is a left-hand thread, and the external thread of the second end of the mounting cylinder (2) is a left-hand thread.

6. The fine-tuning docking and locking device according to claim 1, characterized in that, The external threads of the first and second ends of the focusing field lens (3) are right-hand differential threads, and the pitch of the first end of the focusing field lens (3) is smaller than that of the second end. The internal thread of the tightening ring (4) is a right-hand thread and has the same pitch as the external thread of the second end of the focusing field lens (3). The internal thread (21) of the mounting cylinder (2) is a right-hand thread and has the same pitch as the external thread of the first end of the focusing field lens (3). The internal thread of the first end of the locking sleeve (5) is a right-hand thread, and the external thread of the second end of the mounting cylinder (2) is a right-hand thread.

7. The fine-tuning docking and locking device according to claim 1, characterized in that, The external threads of the first and second ends of the focusing field lens (3) are left-hand differential threads, and the pitch of the first end of the focusing field lens (3) is greater than that of the second end. The internal thread of the tightening ring (4) is a left-hand thread and has the same pitch as the external thread of the second end of the focusing field lens (3). The internal thread (21) of the mounting cylinder (2) is a left-hand thread and has the same pitch as the external thread of the first end of the focusing field lens (3). The internal thread of the first end of the locking sleeve (5) is a right-hand thread, and the external thread of the second end of the mounting cylinder (2) is a right-hand thread.

8. The fine-tuning docking locking device according to claim 1, characterized in that, The external threads of the first and second ends of the focusing field lens (3) are left-hand differential threads, and the pitch of the first end of the focusing field lens (3) is smaller than that of the second end. The internal thread of the tightening ring (4) is a left-hand thread and has the same pitch as the external thread of the second end of the focusing field lens (3). The internal thread (21) of the mounting cylinder (2) is a left-hand thread and has the same pitch as the external thread of the first end of the focusing field lens (3). The internal thread of the first end of the locking sleeve (5) is a left-hand thread, and the external thread of the second end of the mounting cylinder (2) is a left-hand thread.

9. The fine-tuning docking locking device according to any one of claims 1 to 8, characterized in that, The objective lens (1), the mounting tube (2), the focusing field lens (3), the clamping ring (4), and the locking sleeve (5) are all coaxially arranged.

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