A device for tightening the lock nut of a cardan shaft

Abstract

The application relates to a device for screwing a locking nut on a universal shaft, belonging to the technical field of screw universal shaft assembly, which comprises a driving mechanism, a tightening assembly, a half ring block and a sleeve for accommodating the half ring block, the sleeve is in transmission connection with the driving mechanism, a limiting block and a matching block are arranged on the half ring block, a limiting groove for circumferentially limiting the limiting block is arranged at the end of the sleeve, and the matching block is used for matching an axial groove of a slotted round nut. Therefore, the half ring block and the sleeve are matched to stably adhere to the outer circular surface of the locking nut, the matching block is clamped into the axial groove of the outer circular surface of the locking nut, the limiting block and the limiting groove are matched to transmit the torque, the locking nut on the spline joint of the universal shaft can be fixed to receive the torque, meanwhile, the output torque of the driving mechanism is used to drive the sleeve to rotate, therefore, the locking nut can be automatically screwed on and off, the quality effect of the tightened locking nut is reliable, and the quality of the tightened workpiece is guaranteed.

Description

Technical Field

[0001] This application relates to the field of screw universal joint assembly technology, and in particular to a device for locking nuts on universal joints. Background Technology

[0002] In the current industry technology, the tightening or loosening of screw drill parts is mainly done using a hydraulic assembly / disassembly frame. During the tightening of the spline joint and lock nut threads on the universal joint, the distance between the fixed and movable clamps of the hydraulic assembly / disassembly frame is too large. However, the product structure limits the distance between the spline joint and the lock nut to be less than the distance between the movable and fixed clamps, making it impossible to clamp both the spline joint and the lock nut simultaneously. Therefore, in actual assembly, an extension rod and a crescent wrench are used manually to tighten the lock nut.

[0003] However, manually tightening nuts using an extended rod and a toothed wrench poses significant safety hazards, makes it difficult to guarantee the tightening torque, results in low production cycle time and automation, and intensifies labor intensity, greatly reducing work efficiency. Therefore, it is necessary to research and improve the structure of the nut tightening device, providing a device for tightening nuts on universal joints to achieve greater practical value. Summary of the Invention

[0004] In view of the shortcomings or deficiencies mentioned in the background technology, the present application provides a device for tightening the locking nut of a universal joint, which can realize the automatic tightening and loosening of the universal joint and the locking nut, and ensure the tightening quality of the locking nut.

[0005] This application provides a device for fastening a universal joint lock nut, comprising: Drive mechanism; The tightening assembly includes a semi-ring block and a sleeve for accommodating the semi-ring block. The sleeve is connected to the drive mechanism. The semi-ring block is provided with a limit block and a mating block. The end of the sleeve is provided with a limit groove for circumferentially limiting the limit block. The mating block is used to match the axial groove of the slotted round nut.

[0006] In some embodiments, the limiting groove is provided with an opening for the limiting block to enter and exit, and the end of the sleeve is detachably equipped with a first pressure plate for preventing the limiting block from disengaging from the limiting groove.

[0007] In some embodiments, at least two circumferentially spaced support columns are detachably mounted at the end of the sleeve, the axis of the support columns being parallel to the axis of the sleeve.

[0008] In some embodiments, the drive mechanism includes a mounting base on which a drive shaft connected to the sleeve is mounted, and a geared motor for driving the drive shaft to rotate.

[0009] In some embodiments, the drive shaft is rotatably connected to the mounting base via bearings, the bearings including a first bearing and a second bearing spaced apart, the drive shaft being fitted with a threaded sleeve for limiting the inner ring of the first bearing, and the mounting base being fitted with an end cap for limiting the outer ring of the second bearing.

[0010] In some embodiments, a first key block is mounted on the output shaft of the geared motor, and a engagement groove is provided at the end of the transmission shaft away from the sleeve for the geared motor output shaft and the first key block to engage. The drive shaft is equipped with a second key block at the end away from the geared motor, and the sleeve is provided with a keyway at the end away from the semi-ring block for the second key block to engage.

[0011] In some embodiments, the sleeve has a stepped surface, and a second pressure plate is detachably mounted on the end of the drive shaft away from the geared motor, which abuts against the stepped surface and is used to prevent the sleeve from axially disengaging from the drive shaft.

[0012] In some embodiments, the sleeve is fitted with a first set screw threaded to the drive shaft and a second set screw for tightening the second key block.

[0013] In some embodiments, an angular displacement sensor is mounted on the mounting base via a bracket, and the input shaft of the angular displacement sensor is connected to a roller that is in frictional drive connection with the outer circular surface of the sleeve.

[0014] In some embodiments, the mounting base includes a base plate and two side plates fixed to the base plate, a ring and vertical plates located on both sides of the ring are fixed between the two side plates, and mounting holes communicating with the ring are provided on the side plates.

[0015] The beneficial effects of the technical solution provided in this application include: This application provides a device for fastening a universal joint locking nut, including a drive mechanism and a tightening assembly. The tightening assembly includes a semi-ring block and a sleeve for accommodating the semi-ring block. The sleeve is connected to the drive mechanism. The semi-ring block is provided with a limit block and a mating block. The end of the sleeve is provided with a limit groove for circumferentially limiting the limit block. The mating block is used to match the axial groove of the slotted round nut.

[0016] Therefore, by using the semi-ring block and sleeve in conjunction, the locking nut's outer surface can be stably fitted. The mating block engages with the axial groove on the locking nut's outer surface, and torque is transmitted through the engagement of the limiting block and limiting groove. This allows the locking nut on the universal joint spline to be fixed and receive torque. Simultaneously, the drive mechanism outputs torque to rotate the sleeve, thus enabling automatic locking and unlocking of the locking nut. Compared to traditional manual tightening, this significantly improves work efficiency, and the quality of the tightened locking nut is reliable, ensuring the quality of the tightened workpiece. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the device according to an embodiment of this application; Figure 2 This is a schematic diagram of the exploded structure of the device according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the semi-ring block in an embodiment of this application; Figure 4 This is a schematic diagram of the sleeve structure according to an embodiment of this application; Figure 5 This is a schematic diagram of the transmission shaft according to an embodiment of this application; Figure 6 This is a schematic diagram of the mounting base according to an embodiment of this application.

[0019] The attached diagram lists the components represented by each number as follows: 1. Mounting base; 101. Base plate; 102. Side plate; 103. Ring sleeve; 104. Vertical plate; 2. Gear motor; 201. First key block; 3. Drive shaft; 4. First bearing; 5. Second bearing; 6. Threaded sleeve; 7. End cover; 8. Second key block; 9. Sleeve; 901. Limiting groove; 902. Keyway; 10. Second pressure plate; 11. Semi-ring block; 111. Limiting block; 112. Mating block; 12. First pressure plate; 13. Support column; 14. Bracket. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In view of the shortcomings or deficiencies mentioned in the background technology, the present application provides a device for tightening the locking nut of a universal joint, which can realize the automatic tightening and loosening of the universal joint and the locking nut, and ensure the tightening quality of the locking nut.

[0022] See Figures 1 to 6 As shown, this application embodiment provides a device for fastening a universal joint lock nut, comprising: Drive mechanism; The tightening assembly includes a semi-ring block 11 and a sleeve 9 for accommodating the semi-ring block 11. The sleeve 9 is connected to the drive mechanism. The semi-ring block 11 is provided with a limit block 111 and a mating block 112. The end of the sleeve 9 is provided with a limit groove 901 for circumferentially limiting the limit block 111. The mating block 112 is used to match the axial groove of the slotted round nut.

[0023] The device for tightening a universal joint lock nut in this embodiment includes a drive mechanism and a tightening assembly. The tightening assembly includes a sleeve 9 and a semi-ring block 11. A limit block 111 and a mating block 112 are fixedly connected to the semi-ring block 11. The semi-ring block 11 can be installed inside the sleeve 9. The torque is transmitted through the cooperation of the limit block 111 and the limit groove 901. The inner arc surface of the semi-ring block 11 can fit against the outer circular surface of the lock nut. The mating block 112 is then engaged with the axial groove on the outer circular surface of the lock nut. The drive mechanism outputs torque to drive the sleeve 9 to rotate, which can achieve stable torque transmission to the lock nut and ensure the tightening quality of the lock nut.

[0024] For example, in this embodiment, the drive mechanism uses a geared motor 2, the locking nut is a round nut, and the semi-ring block 11 can quickly, accurately, and stably engage with the locking nut. In use, the locking nut is first initially tightened onto the universal joint, and then the spline joint of the universal joint is fixed by an external hydraulic clamp. The semi-ring block 11 is installed inside the sleeve 9, and the semi-ring block 11 is used to fit against the outer circular surface of the locking nut. At the same time, the mating block 112 is inserted into the axial groove on the outer circular surface of the locking nut. Then, the geared motor 2 outputs torque and drives the sleeve 9 to rotate, thereby realizing the automatic locking of the locking nut.

[0025] In some alternative embodiments: see Figures 1 to 6As shown, this application embodiment provides a device for fastening a universal joint locking nut. The limiting groove 901 of the device for fastening a universal joint locking nut is provided with an opening for the limiting block 111 to enter and exit. A first pressure plate 12 for preventing the limiting block 111 from disengaging from the limiting groove 901 is detachably installed at the end of the sleeve 9.

[0026] In this embodiment, the limiting block 111 can slide into or out of the limiting groove 901 along the axial direction of the sleeve 9, thus facilitating the assembly and disassembly of the semi-ring block 11. By replacing the semi-ring block 11 with different radius specifications, automatic tightening of universal joint locking nuts of various specifications can be achieved. In addition, to prevent the limiting block 111 from disengaging from the limiting groove 901, a first pressure plate 12 is detachably installed at the end of the sleeve 9, which can prevent the semi-ring block 11 from disengaging from the sleeve 9.

[0027] For example, in this embodiment, two symmetrically distributed limiting grooves 901 are provided on the end face of the sleeve 9, and a semi-annular groove for accommodating the semi-annular block 11 is also provided on the inner wall of the sleeve 9. Both ends of the semi-annular block 11 are fixed with radially protruding limiting blocks 111, and a radially protruding mating block 112 is fixed on the inner side of the semi-annular block 11. The semi-annular block 11 can be directly inserted into the sleeve 9 by means of the limiting block 111, and the mating block 112 is used to be inserted into the axial groove on the outer circle surface of the locking nut.

[0028] The first pressure plate 12 has mounting holes at both ends, and screws are installed in the mounting holes. The sleeve 9 has threaded grooves on both sides of the limiting groove 901 for engaging the screws. When the half-ring block 11 needs to be replaced, the screws on one end of the first pressure plate 12 are removed first, and then the first pressure plate 12 can be rotated around the screws on the other side to make room for the limiting block 111 to slide out of the limiting groove 901.

[0029] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a device for fastening a universal joint locking nut. At least two circumferentially spaced support columns 13 are detachably installed at the end of the sleeve 9 of the device for fastening a universal joint locking nut. The axis of the support column 13 is parallel to the axis of the sleeve 9.

[0030] In this embodiment, the support column 13 is threadedly connected to the sleeve 9. There are two support columns 13 spaced apart, with their axes parallel to the axis of the sleeve 9. The two support columns 13 cooperate to support the universal joint, facilitating coaxial arrangement of the universal joint and the sleeve 9. This allows for convenient clamping and fixing of the universal joint by external hydraulic clamps, enabling faster, more accurate, and stable engagement of the semi-ring block 11 and the locking nut. It should be noted that the support column 13 can be disassembled if it interferes with tightening the locking nut.

[0031] In some alternative embodiments: see Figures 1 to 6As shown, this application embodiment provides a device for fastening a universal joint locking nut. The drive mechanism of the device for fastening a universal joint locking nut includes a mounting base 1, a transmission shaft 3 connected to a sleeve 9 mounted on the mounting base 1, and a reduction motor 2 for driving the transmission shaft 3 to rotate.

[0032] The drive mechanism in this embodiment includes a mounting base 1, on which a geared motor 2 for outputting torque is mounted. The geared motor 2 is connected to the sleeve 9 via a transmission shaft 3. The mounting base 1 can be mounted on an external equipment platform to facilitate stable torque output by the geared motor 2. For example, the geared motor 2 in this embodiment is a geared servo motor, which can provide high torque power and realize the automatic tightening of the universal joint and the locking nut.

[0033] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a device for fastening a universal joint locking nut. The drive shaft 3 of the device for fastening a universal joint locking nut is rotatably connected to the mounting base 1 via bearings. The bearings include a first bearing 4 and a second bearing 5 spaced apart. A threaded sleeve 6 for limiting the inner ring of the first bearing 4 is installed on the drive shaft 3, and an end cap 7 for limiting the outer ring of the second bearing 5 is installed on the mounting base 1.

[0034] In this embodiment, the drive shaft 3 is a stepped shaft. To improve the transmission stability of the stepped shaft, bearings with matching mounting seats 1 are installed at both ends of the stepped shaft. The bearings include a first bearing 4 and a second bearing 5. The first bearing 4 is an angular contact bearing, and the second bearing 5 is a deep groove ball bearing. The angular contact bearing and the deep groove ball bearing abut against the shoulders at both ends of the stepped shaft, respectively. An end cap 7 that abuts against the outer ring of the deep groove ball bearing is installed on the mounting seat 1 by bolts. A threaded sleeve 6 that abuts against the inner ring of the angular contact bearing is threadedly connected to the drive shaft 3.

[0035] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a device for fastening a universal joint locking nut. The output shaft of the geared motor 2 of the device for fastening a universal joint locking nut is equipped with a first key block 201, and the end of the transmission shaft 3 away from the sleeve 9 is provided with a engagement groove for the output shaft of the geared motor 2 and the first key block 201 to be engaged. The drive shaft 3 is equipped with a second key block 8 at the end away from the geared motor 2, and the sleeve 9 is provided with a keyway 902 at the end away from the semi-ring block 11 for the second key block 8 to be inserted.

[0036] The engagement groove in this embodiment is not shown in the figure. The output shaft of the geared motor 2 can be inserted into the engagement groove of the transmission shaft 3 and connected to the transmission shaft 3 by the first key block 201. The transmission shaft 3 can be inserted into the sleeve 9 and connected by the second key block 8 into the keyway 902, so that the torque of the geared motor 2 can be stably transmitted to the sleeve 9 through the transmission shaft 3, thereby realizing high torque power transmission.

[0037] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a device for fastening a universal joint locking nut. The sleeve 9 of the device for fastening a universal joint locking nut has a stepped surface. The end of the drive shaft 3 away from the geared motor 2 is detachably equipped with a second pressure plate 10 that abuts against the stepped surface and is used to prevent the sleeve 9 from axially disengaging from the drive shaft 3.

[0038] The sleeve 9 in this embodiment of the application is provided with a stepped surface. The stepped surface is annular and faces the end where the limiting groove 901 is located. Two second pressure plates 10 that abut against the stepped surface are symmetrically installed at the end of the transmission shaft 3 by bolts. The second pressure plates 10 can prevent the sleeve 9 from slipping off the transmission shaft 3.

[0039] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a device for fastening a universal joint locking nut. The sleeve 9 of the device for fastening a universal joint locking nut is equipped with a first set screw that is threadedly connected to the drive shaft 3, and a second set screw for tightening the second key block 8.

[0040] The first set screw and the second set screw in the embodiments of this application are not shown in the figure. The first set screw is threadedly connected to the sleeve 9 and the drive shaft 3, which can prevent the sleeve 9 and the drive shaft 3 from sliding axially relative to each other. The second set screw is threadedly connected to the sleeve 9 and abuts against the second key block 8, which can prevent the second key block 8 from loosening.

[0041] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a device for fastening a universal joint locking nut. An angular displacement sensor is mounted on the mounting base 1 of the device via a bracket 14. The input shaft of the angular displacement sensor is connected to a roller that is in frictional transmission with the outer surface of the sleeve 9.

[0042] In this embodiment, a bracket 14 is bolted onto the mounting base 1. The bracket 14 is located on the outer periphery of the sleeve 9. An angular displacement sensor is mounted on the bracket 14 via screws. The input shaft of the angular displacement sensor is fixedly connected to a roller. The roller is connected to the outer circumference of the sleeve 9 via friction transmission. When the sleeve 9 rotates, the roller rotates due to friction. By detecting the angular displacement of the roller, the angular displacement sensor can indirectly detect the angular displacement of the sleeve 9. Combined with the high torque provided by the geared motor 2, this facilitates control of the number of turns of the sleeve 9 tightening, achieving automatic tightening of the universal joint and the locking nut. It should be noted that the angular displacement sensor and roller in this embodiment are not shown in the figures.

[0043] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a device for fastening a universal joint locking nut. The mounting base 1 of the device for fastening a universal joint locking nut includes a base plate 101 and two side plates 102 fixed on the base plate 101. A ring sleeve 103 and vertical plates 104 located on both sides of the ring sleeve 103 are fixed between the two side plates 102. The side plates 102 are provided with mounting holes that communicate with the ring sleeve 103.

[0044] In this embodiment, the base plate 101 has mounting holes, the side plate 102 is welded and fixed to the base plate 101, the two ends of the ring sleeve 103 are welded and fixed to the two side plates 102 respectively, and two vertical plates 104 are provided. Both the side plate 102 and the base plate 101 are welded and fixed to the vertical plates 104. The ring sleeve 103 is coaxially arranged with the mounting holes on the side plate 102, which facilitates the installation of the drive shaft 3.

[0045] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0046] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A device for fastening a locking nut on a universal joint, characterized in that, include: Drive mechanism; The tightening assembly includes a semi-ring block (11) and a sleeve (9) for accommodating the semi-ring block (11). The sleeve (9) is connected to the drive mechanism. The semi-ring block (11) is provided with a limit block (111) and a mating block (112). The end of the sleeve (9) is provided with a limit groove (901) for circumferentially limiting the limit block (111). The mating block (112) is used to match the axial groove of the slotted round nut.

2. The device for fastening the locking nut of a universal joint as described in claim 1, characterized in that: The limiting groove (901) is provided with an opening for the limiting block (111) to enter and exit, and the end of the sleeve (9) is detachably equipped with a first pressure plate (12) for preventing the limiting block (111) from disengaging from the limiting groove (901).

3. The device for fastening the locking nut of a universal joint as described in claim 1, characterized in that: At least two circumferentially spaced support columns (13) are detachably installed at the end of the sleeve (9), and the axis of the support column (13) is parallel to the axis of the sleeve (9).

4. The device for fastening the locking nut of a universal joint as described in claim 1, characterized in that: The drive mechanism includes a mounting base (1), on which a transmission shaft (3) connected to the sleeve (9) is mounted, and a geared motor (2) for driving the transmission shaft (3) to rotate.

5. The device for fastening the locking nut of a universal joint as described in claim 4, characterized in that: The drive shaft (3) is rotatably connected to the mounting base (1) via bearings. The bearings include a first bearing (4) and a second bearing (5) spaced apart. A threaded sleeve (6) for limiting the inner ring of the first bearing (4) is installed on the drive shaft (3). An end cap (7) for limiting the outer ring of the second bearing (5) is installed on the mounting base (1).

6. The device for fastening the locking nut of a universal joint as described in claim 4, characterized in that: The output shaft of the geared motor (2) is equipped with a first key block (201), and the end of the transmission shaft (3) away from the sleeve (9) is provided with a engagement groove for the output shaft of the geared motor (2) and the first key block (201) to be engaged. The drive shaft (3) is equipped with a second key block (8) at one end away from the geared motor (2), and the sleeve (9) is provided with a keyway (902) at one end away from the semi-ring block (11) for the second key block (8) to be inserted.

7. The device for fastening the locking nut of a universal joint as described in claim 4, characterized in that: The sleeve (9) has a stepped surface inside, and a second pressure plate (10) is detachably installed at the end of the drive shaft (3) away from the geared motor (2) to abut against the stepped surface and to prevent the sleeve (9) from axially disengaging from the drive shaft (3).

8. The device for fastening the locking nut of a universal joint as described in claim 6, characterized in that: The sleeve (9) is fitted with a first set screw that is threaded to the drive shaft (3) and a second set screw for tightening the second key block (8).

9. The device for fastening the locking nut of a universal joint as described in claim 4, characterized in that: An angular displacement sensor is mounted on the mounting base (1) via a bracket (14). The input shaft of the angular displacement sensor is connected to a roller that is in frictional transmission with the outer surface of the sleeve (9).

10. The device for fastening the locking nut of a universal joint as described in claim 4, characterized in that: The mounting base (1) includes a base plate (101) and two side plates (102) fixed on the base plate (101). A ring sleeve (103) and vertical plates (104) located on both sides of the ring sleeve (103) are fixed between the two side plates (102). The side plates (102) are provided with mounting holes that communicate with the ring sleeve (103).

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