Adjustable telescopic connecting shaft

Abstract

The utility model discloses an adjustable telescopic connecting shaft, which relates to the technical field of connecting shafts, solves the technical problem that the length of the connecting shaft cannot be quickly adjusted, locked and adjusted in the prior art, and comprises a front shaft sleeve, a rear shaft sleeve and a distance adjusting structure, the distance adjusting structure comprises a threaded rod and a connector flange, a threaded sleeve is fixedly installed at the front end of the inner sleeve, the threaded sleeve is in threaded connection with the threaded rod, an outer sleeve is fixedly installed on the connector flange, the inner sleeve is installed in the outer sleeve in a sliding mode, the threaded rod is rotatably installed in the connector flange, and the threaded rod is connected with the threaded sleeve in a threaded mode. The device has the advantages of being reasonable in structural design, convenient and fast to operate, accurate in adjustment and the like, stepless adjustment and reliable locking of the length of the connecting shaft are achieved through threads and a worm and gear mechanism, and the device meets the installation requirements of different devices; and the guide key and the key slot ensure the coaxiality of the shaft body during stretching and retracting, so that the transmission stability and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of connecting shaft, concretely is adjustable telescopic connecting shaft. BACKGROUND

[0002] The utility model relates to the technical field, and connecting shaft is used as the connecting element in the mechanical transmission system commonly, is widely used in all kinds of mechanical equipment, vehicle, automation device etc. The traditional connecting shaft is usually fixed length structure, cannot adjust length according to actual use demand. In the actual application process, because of the difference of equipment structure size, the limitation of installation space or the clearance change caused by the wear and tear of spare part, the fixed length connecting shaft often is difficult to satisfy the changeable installation and use demand, in order to solve this problem, part of prior art has adopted telescopic connecting shaft, and the length adjustment in a certain range is realized through sleeve, sliding etc. The existing telescopic connecting shaft still has the insufficient in the adjustment precision, locking reliability, bearing capacity and the operation convenience etc., and the problems such as loose connection, inconvenient adjustment or the decline of bearing capacity are likely to appear, which influence the normal operation and safety of equipment.

[0003] Adjustable telescopic connecting shaft can freely adjust the length of the shaft within a certain range according to actual installation needs, adapt to different equipment structures and space requirements, and ensure that the two ends can reliably connect various mechanical components to achieve effective transmission of power or motion. After adjusting to the required length, the connecting shaft can be reliably fixed by the locking device to prevent loosening or slipping during use, while having strong bearing capacity to meet the torque and axial load requirements of mechanical equipment.

[0004] The application of adjustable telescopic connecting shaft effectively improves the adaptability of equipment, can meet the installation requirements of different equipment or working conditions, reduces the customization of parts, and improves the universality. During equipment maintenance or replacement of parts, only the length of the shaft needs to be adjusted, without the need for overall replacement, which significantly saves material and labor costs; the connecting shaft improves the safety and stability of equipment operation through reliable locking and high bearing capacity, reduces faults, and promotes the standardization and modular design of mechanical products, and promotes the technological progress and industrial upgrading of mechanical manufacturing industry.

[0005] The existing technical solution has the technical problem that the length of the connecting shaft cannot be quickly adjusted and locked. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of the prior art, the utility model provides an adjustable telescopic connecting shaft, which solves the technical problem that the length of the connecting shaft cannot be quickly adjusted and locked in the existing technical solution.

[0007] To achieve the above object, the utility model discloses an adjustable telescopic connecting shaft, including front axle sleeve, rear axle sleeve and distance adjusting structure, the inner sleeve of front axle sleeve is fixedly installed with the inner sleeve, and the distance adjusting structure includes threaded rod and joint flange, the front end fixed mounting of inner sleeve has the threaded bush, the threaded bush is connected with threaded rod, the outer sleeve of joint flange is fixedly installed with, the inner sleeve is slidably installed in the outer sleeve, threaded rod is rotatably installed in the joint flange, the joint flange is fixedly connected with rear axle sleeve, and the joint flange is provided with distance adjusting part, through the cooperation of front axle sleeve, rear axle sleeve and distance adjusting structure, the continuous adjustable of connecting shaft length is realized, the threaded transmission of distance adjusting structure adopts threaded bush and threaded rod, so that the user can conveniently rotate threaded rod, drive the telescopic of inner and outer sleeve, thereby the length of connecting shaft is adjusted, satisfies the demand of different equipment installation pitch, improves the adaptability and flexibility of connecting shaft.

[0008] Preferably, the distance adjusting part includes a worm gear and a worm, the worm gear is fixedly installed outside the threaded rod, the worm gear is rotatably installed in the joint flange, the worm is rotatably installed in the joint flange, the worm gear is meshed with the worm, and the worm has an inner recess adjusting head fixedly installed at one end and penetrating through the side wall of the joint flange. The meshing structure of the worm gear and the worm allows the user to rotate the worm to indirectly rotate the threaded rod, thereby realizing fine adjustment of the length. The worm gear and the worm have a self-locking function, which can prevent reverse loosening after adjustment, thereby ensuring the stability and safety of length adjustment. The inner recess adjusting head facilitates operation of a special tool, thereby improving the convenience and accuracy of adjustment.

[0009] Preferably, the outer sleeve is provided with a key groove, the inner sleeve is provided with a guide key fixedly installed on the outer wall surface, the guide key is slidably installed in the key groove, and the outer sleeve is provided with a dustproof sleeve fixedly installed at the front end. The key groove in the outer sleeve cooperates with the guide key on the outer wall surface of the inner sleeve to ensure that the inner and outer sleeves remain coaxial and prevent relative rotation during telescopic adjustment, thereby effectively improving the reliability and stability of transmission. The dustproof sleeve at the front end of the outer sleeve can prevent dust, impurities, and the like from entering the inside of the shaft body, thereby protecting the internal structure from pollution and prolonging the service life of the connecting shaft.

[0010] Preferably, the rear axle sleeve is provided with a through hole, the joint flange is provided with a connecting nut fixedly installed thereon, the rear axle sleeve is provided with a connecting bolt, and the connecting bolt is threadedly connected with the connecting nut through the through hole. The through hole in the rear axle sleeve, the connecting nut on the joint flange, and the connecting bolt cooperate to realize quick and firm connection of the connecting shaft with other components. This structure facilitates disassembly and installation, thereby improving the maintenance efficiency and assembly convenience of the equipment and reducing downtime.

[0011] Preferably, a sealing sleeve is arranged between the rear axle sleeve and the joint flange, and an outer sleeve ring is arranged outside the joint flange and the rear axle sleeve; the sealing sleeve arranged between the rear axle sleeve and the joint flange effectively improves the sealing performance of the joint, prevents leakage of lubricating oil and invasion of external dust, water and the like; and the outer sleeve ring enhances the structural strength and overall stability, and meets the use requirements in complex working conditions.

[0012] Preferably, spline grooves are arranged in the front axle sleeve and the rear axle sleeve, fastening screws are arranged on the front axle sleeve and the rear axle sleeve, and the front axle sleeve and the rear axle sleeve are respectively connected with external connecting shafts; the spline grooves arranged in the front axle sleeve and the rear axle sleeve enable the connecting shafts to realize efficient torque transmission with external transmission shafts, and ensure the reliability of power transmission.

[0013] Preferably, a length scale is fixedly installed on the inner sleeve; the length scale can directly display the current extension length of the connecting shaft, and facilitate accurate positioning and recording of the user during installation or adjustment, thereby improving the directness of operation and the accuracy of adjustment.

[0014] Beneficial effects

[0015] The adjustable telescopic connecting shaft has the advantages of reasonable structural design, convenient operation, accurate adjustment and the like, realizes stepless adjustment and reliable locking of the length of the connecting shaft through a thread and a worm and gear mechanism, meets the installation requirements of different devices, ensures coaxiality of the shaft body during extension and retraction through a guide key and a key groove, improves the stability and efficiency of transmission, effectively prevents dust and lubricating oil from leaking through a sealing sleeve and a dustproof sleeve, prolongs the service life, is convenient to connect and disassemble, cooperates with the length scale, is convenient to accurately adjust and maintain, has high overall bearing capacity, has a wide application range, and has good practicability and economy. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 FIG. 1 is a front view of a main structure of the adjustable telescopic connecting shaft.

[0017] Fig. 2 FIG. 2 is a front view of a structure of the adjustable telescopic connecting shaft.

[0018] In the drawings: 1, front axle sleeve; 2, rear axle sleeve; 3, inner sleeve; 4, threaded rod; 5, joint flange; 6, threaded sleeve; 7, outer sleeve; 8, worm; 9, worm gear; 10, concave adjusting head; 11, guide key; 12, key groove; 13, dustproof sleeve; 14, connecting nut; 15, connecting bolt; 16, sealing sleeve; 17, outer sleeve ring; 18, spline groove; 19, fastening screw; 20, length scale. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. The detailed description is as follows.

[0020] Please refer to Figs. 1-2 The utility model provides a kind of technical scheme: a kind of adjustable telescopic connecting shaft, including front shaft sleeve, rear shaft sleeve and distance adjusting structure, fixedly installed with inner sleeve on the front shaft sleeve, the distance adjusting structure includes threaded rod and joint flange, threaded sleeve is fixedly installed with the inner sleeve front end, the threaded sleeve is connected with the threaded rod, fixedly installed with outer sleeve on the joint flange, the inner sleeve is slidably installed in the outer sleeve, the threaded rod is rotatably installed in the joint flange, the joint flange is fixedly connected with rear shaft sleeve, distance adjusting portion is provided in the joint flange;Through the cooperation of front shaft sleeve, rear shaft sleeve and distance adjusting structure, the continuous adjustable of connecting shaft length is realized;Distance adjusting structure adopts the threaded transmission of threaded sleeve and threaded rod, so that user can conveniently rotate threaded rod, drive inner and outer sleeve telescopic, to adjust the length of connecting shaft, meet the needs of different equipment installation pitch, improve the adaptability and flexibility of connecting shaft.

[0021] The embodiment is further provided as, the distance adjusting portion includes worm wheel and worm, the worm wheel is fixedly installed outside the threaded rod, the worm wheel is rotatably installed in the joint flange, the worm is rotatably installed in the joint flange, the worm wheel is engagedly connected with the worm, one end of the worm passes through the side wall of the joint flange and is fixedly installed with inner recess adjusting head;The meshing structure of worm wheel and worm makes that user can rotate worm, indirectly drive threaded rod rotation, realizes the fine adjustment of length;Worm wheel and worm structure have self-locking function, can prevent reverse loosening after adjusting, guarantee the stability and security of length adjustment;Inner recess adjusting head is convenient for special tool operation, improves the convenience and accuracy of adjustment.

[0022] The embodiment is further provided as, the outer sleeve is provided with keyway, the outer wall of the inner sleeve is fixedly installed with guide key, the guide key is slidably installed in the keyway, and the dust cover is fixedly installed at the front end of the outer sleeve;The keyway in the outer sleeve cooperates with the guide key on the outer wall of the inner sleeve, to ensure that the inner and outer sleeves remain coaxial and prevent relative rotation during telescopic adjustment, effectively improve the reliability and stability of transmission;The dust cover design at the front end of the outer sleeve can prevent dust, impurities and the like from entering the inside of the shaft body, protect the internal structure from pollution, and prolong the service life of the connecting shaft.

[0023] The embodiment is further provided with a through hole on the rear shaft sleeve, a connecting nut fixedly installed on the joint flange, and a connecting bolt provided on the rear shaft sleeve and threadedly connected with the connecting nut through the through hole; the cooperation of the through hole on the rear shaft sleeve, the connecting nut on the joint flange, and the connecting bolt realizes quick and firm connection of the connecting shaft with other components; the structure is convenient to disassemble and assemble, improves the maintenance efficiency and assembly convenience of the equipment, and reduces downtime.

[0024] The embodiment is further provided with a sealing sleeve arranged between the rear shaft sleeve and the joint flange, and an outer sleeve ring arranged outside the joint flange and the rear shaft sleeve; the sealing sleeve arranged between the rear shaft sleeve and the joint flange effectively improves the sealing performance of the connection part, prevents leakage of lubricating oil and intrusion of external dust, moisture, and the like; the arrangement of the outer sleeve ring enhances the structural strength and overall stability, and meets the use requirements in complex working conditions.

[0025] The embodiment is further provided with a spline groove formed in the front shaft sleeve and the rear shaft sleeve, a fastening screw arranged on the front shaft sleeve and the rear shaft sleeve, and an external connecting shaft connected with the front shaft sleeve and the rear shaft sleeve respectively; the spline groove in the front shaft sleeve and the rear shaft sleeve enables the connecting shaft to realize efficient torque transmission with the external transmission shaft, and ensures the reliability of power transmission; the arrangement of the fastening screw further improves the firmness of the connection, prevents loosening during use, and ensures the safety of equipment operation.

[0026] The embodiment is further provided with a length scale fixedly installed on the inner sleeve; the current extension length of the connecting shaft can be directly displayed, which facilitates accurate positioning and recording of the user during installation or adjustment, and improves the intuitiveness of operation and the accuracy of adjustment.

[0027] The detailed connection means is a known technology in the art; as shown in the drawings, Figs. 1-2 The front shaft sleeve and the rear shaft sleeve are respectively butted with the external transmission shaft to be connected, and are fixed through the spline groove and the fastening screw to ensure firm and reliable connection.

[0028] According to actual installation requirements of the equipment, a special tool (such as a wrench matched with an inner concave adjusting head) is inserted into an adjusting port in the side wall of the joint flange, and the worm is rotated. The worm drives the worm gear to rotate, thereby driving the threaded rod to rotate, so that the threaded rod and the threaded sleeve produce axial movement, drive the inner sleeve to extend and retract relative to the outer sleeve, and realize stepless adjustment of the length of the connecting shaft.

[0029] During the adjustment process, the length scale on the inner sleeve can be referred to for accurate control of the extension length of the connecting shaft to meet specific installation requirements.

[0030] After adjusting to the required length, the worm and gear structure has self-locking function, which can prevent the shaft body from automatic sliding and ensure the stability of the shaft length. Check the matching condition of the guide key and the key groove to ensure the smooth and non-loose sliding of the inner and outer sleeves.

[0031] Confirm the installation of the dust cover, sealing sleeve and outer sleeve ring to prevent dust and impurities from entering the inside of the connecting shaft and lubricating oil leakage, and ensure the long-term reliable operation of the connecting shaft in complex environment.

[0032] Through the through hole on the rear shaft sleeve, the connecting nut and the connecting bolt, the connecting shaft is tightly connected with other mechanical parts. After completing all connections, the overall debugging of the equipment is carried out, the working state of the connecting shaft is checked, and the smooth power transmission, no abnormal noise and no looseness are ensured.

[0033] It should be noted that in this paper, relational terms such as first and second are used merely to distinguish one entity or action from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or actions.

[0034] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any equivalent embodiments with equivalent changes are equivalent to the above disclosed technical content. Any modification, equivalent change and modification of the above embodiments, which does not depart from the technical essence of the present application, is still within the scope of the present application.

Claims

1. An adjustable telescopic connecting shaft, comprising a front axle sleeve, a rear axle sleeve, and an adjusting structure, characterized in that, An inner sleeve is fixedly installed on the front axle sleeve. The adjustable distance structure includes a threaded rod and a joint flange. A threaded sleeve is fixedly installed at the front end of the inner sleeve. The threaded sleeve is threadedly connected to the threaded rod. An outer sleeve is fixedly installed on the joint flange. The inner sleeve is slidably installed inside the outer sleeve. The threaded rod is rotatably installed inside the joint flange. The joint flange is fixedly connected to the rear axle sleeve. A distance adjustment part is provided inside the joint flange.

2. The adjustable telescopic connecting shaft according to claim 1, characterized in that... The distance adjustment part includes a worm gear and a worm. The worm gear is fixedly installed outside the threaded rod and rotatably installed inside the joint flange. The worm is rotatably installed inside the joint flange. The worm gear and the worm are meshed and connected. One end of the worm passes through the side wall of the joint flange and is fixedly installed with a concave adjustment head.

3. The adjustable telescopic connecting shaft according to claim 1, characterized in that... The outer sleeve has a keyway inside, and a guide key is fixedly installed on the outer wall of the inner sleeve. The guide key is slidably installed in the keyway, and a dust cover is fixedly installed at the front end of the outer sleeve.

4. An adjustable telescopic connecting shaft according to claim 1, characterized in that... The rear axle sleeve has a through hole, a connecting nut is fixedly installed on the joint flange, and a connecting bolt is provided on the rear axle sleeve. The connecting bolt passes through the through hole and is threadedly connected to the connecting nut.

5. An adjustable telescopic connecting shaft according to claim 1, characterized in that... A sealing sleeve is provided between the rear axle sleeve and the joint flange, and an outer ring is provided outside the joint flange and the rear axle sleeve.

6. An adjustable telescopic connecting shaft according to claim 1, characterized in that... The front and rear axle sleeves are provided with spline grooves, and fastening screws are provided on the front and rear axle sleeves. The front and rear axle sleeves are respectively connected to external shafts.

7. An adjustable telescopic connecting shaft according to claim 1, characterized in that... A length scale is fixedly installed on the inner sleeve.

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