Automatic installation tool for keyed threaded bushings

Abstract

The application provides a key thread bushing automatic installation tool, and belongs to the technical field of assembly tools for fastening. The installation tool comprises a mandrel and a force bearing sleeve. The front end of the mandrel is provided with an external thread, and the rear end of the mandrel is in transmission connection with a rotary power output mechanism. The force bearing sleeve is sleeved on the outside of the mandrel and can move relatively in the axial and circumferential directions. The front end of the force bearing sleeve is used for pressing a pin key. The rotary power output mechanism comprises a transmission shaft and a transmission sleeve which are guided in the axial direction and are in rotation-stopping cooperation in the circumferential direction. The transmission shaft or the transmission sleeve is matched with a direct-acting power output mechanism, so that the transmission shaft or the transmission sleeve applies a pulling force to the mandrel, thereby indirectly making the pressing end of the force bearing sleeve translate towards the pin key. The application can improve the installation efficiency, reduce the labor intensity, accurately control the installation position, has the functions of installation pressure and installation speed adjustment, installation force real-time monitoring, feedback and automatic compensation, saving, can guarantee the product installation consistency, and improve the quality reliability.

Description

Technical Field

[0001] This invention relates to an automatic installation tool for keyed threaded bushings, belonging to the technical field of assembly tools for fastening. Background Technology

[0002] Aerospace engine casings are typically made of lightweight alloys. To prevent wear and deformation of the internal threads on the casing, keyed threaded bushings are usually embedded in the base. Currently, keyed threaded bushings are mainly installed manually. For example, Chinese invention patent application CN115070679A discloses a keyed threaded bushing installation tool, which includes a pin, a spring, a retaining sleeve, and an anti-disengagement pin. One end of the pin can screw the keyed threaded bushing into the base, and the other end can press the key into the base. In use, the keyed threaded bushing is manually screwed into the threaded hole of the base 1-2 turns. Then, the first end of the pin is aligned with the inner hole of the keyed threaded bushing, so that the key is inserted into the anti-rotation groove of the screwing section. Then, the pin is manually rotated to fully screw the keyed threaded bushing into the threaded hole of the base. Then, the pin is flipped so that the guide post of the second end of the pin is aligned with the inner hole of the bushing. The end face of the first end is tapped with a hammer to press the key into the base.

[0003] The above installation process is purely manual, which is inefficient and labor-intensive. It is also difficult to ensure that the direction of the hammering force is absolutely axial when striking with a hand hammer, and it is also difficult to control the force of the hammering. Therefore, the key is easily deformed, and there is a possibility of improper installation or over-installation that damages the base. The installation accuracy is poor. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic installation tool for keyed threaded bushings, so as to solve the problems of low installation efficiency and high labor intensity caused by the purely manual operation of keyed threaded bushing installation in the prior art.

[0005] To achieve the above objectives, the automatic installation tool for keyed threaded bushings in this invention adopts the following technical solution:

[0006] An automatic installation tool for keyed threaded bushings includes a mandrel and a load-bearing sleeve, both extending along the front-rear direction. The front end of the mandrel has an external thread for matching and connecting with the internal threaded hole of the keyed threaded bushing, and the rear end of the mandrel is driven by a rotary power output mechanism. The load-bearing sleeve is sleeved outside the mandrel, and both can move relative to each other in the axial and circumferential directions. The front end of the load-bearing sleeve is a pressing end for pressing the key. The rear end of the load-bearing sleeve is driven by a direct-acting power output mechanism to directly drive the pressing end of the load-bearing sleeve to translate toward the key. Alternatively, the rotary power output mechanism includes a drive shaft and a drive sleeve that are axially guided and circumferentially anti-rotationally engaged. The drive shaft or drive sleeve cooperates with the direct-acting power output mechanism so that the drive shaft or drive sleeve applies a tensile force to the mandrel, thereby indirectly causing the pressing end of the load-bearing sleeve to translate toward the key.

[0007] Furthermore, the outer circumferential surface of the load-bearing sleeve includes a smooth rod section and a first threaded section. A limiting sleeve is fitted outside the smooth rod section. The front end face of the limiting sleeve is a pressing surface for pressing the base. An elastic element for applying a forward force to the limiting sleeve is provided between the limiting sleeve and the load-bearing sleeve. A limiting space for limiting the pin key is formed between the front end of the limiting sleeve and the mandrel. The first threaded section is located behind the smooth rod section. An outer nut is connected to the outside of the first threaded section. A front flange is provided at the front end of the outer nut. A rear flange is provided at the rear end of the limiting sleeve. The rear flange is located behind the front flange and is in a stop-fitting engagement with the front flange in the front-rear direction.

[0008] Furthermore, the rear end of the limiting sleeve is provided with a rearwardly extending lug, and the load-bearing sleeve is provided with a stop step for stopping the rearward movement of the lug. The load-bearing sleeve is also provided with an insertion groove for the lug to extend into. The circumferential position of the limiting sleeve relative to the load-bearing sleeve when rotating includes a stop position for the lug and the stop step to stop in a front-to-back stop fit, and also includes a movable position for the lug and the insertion groove to correspond so that the limiting sleeve and the load-bearing sleeve can move relative to each other along the axial direction.

[0009] Furthermore, the outer circumferential surface of the bare rod section is respectively provided with a first protrusion structure for engaging with the lug in the circumferential direction to limit the forward rotation limit of the limiting sleeve and a second protrusion structure for limiting the reverse rotation limit of the limiting sleeve. When the lug engages with the first protrusion structure, the limiting sleeve is in the active position. When the lug engages with the second protrusion structure, the limiting sleeve is in the stopped position. The limiting sleeve is also provided with a first groove for the first protrusion structure to extend into and a second groove for the second protrusion structure to extend into when it is in the active position.

[0010] Furthermore, the rotary power output mechanism includes an intermediate shaft disposed on the rear side of the spindle. The front end of the intermediate shaft and the rear end of the spindle are connected by a joint structure. The joint structure includes a first joint cylinder. The front end of the intermediate shaft and the rear end of the spindle extend into the first joint cylinder and are connected to the first joint cylinder.

[0011] Furthermore, the joint structure also includes a second joint cylinder sleeved outside the first joint cylinder and anti-rotationally engaged with the first joint cylinder. The mandrel is provided with an anti-rotation part that anti-rotationally engages with the inner hole of the second joint cylinder. The front end of the intermediate shaft and the rear end of the mandrel are respectively threaded to the first joint cylinder. An anti-rotation pin is also installed between the front end of the intermediate shaft and the first joint cylinder.

[0012] Furthermore, the rotary power output mechanism includes the aforementioned drive shaft and drive sleeve, and the direct-acting power output mechanism includes a drive sleeve sleeved outside the drive shaft with threads on its outer circumferential surface. The front end of the drive sleeve and the rear end of the drive sleeve are axially blocked and circumferentially rotated together. The external thread of the drive sleeve is connected to a gear sleeve with teeth on its outer circumferential surface. The keyed threaded bushing automatic installation tool also includes a housing, and the gear sleeve is rotatably installed inside the housing. The direct-acting power output mechanism also includes a direct-acting power motor disposed inside the housing and a gear transmission structure disposed between the output end of the direct-acting power motor and the gear sleeve.

[0013] Furthermore, a fixing rod is fixed on the rear end face of the transmission screw sleeve, and a displacement sensor is installed inside the housing. The fixing rod is connected to the measuring end of the displacement sensor.

[0014] Furthermore, an intermediate shaft is connected between the transmission sleeve and the spindle. The rear end of the intermediate shaft is located inside the housing, and the front end is located outside the housing. The rear end of the intermediate shaft extends into the transmission sleeve and engages with the transmission sleeve to prevent rotation. An anti-rotation pin is also installed between the intermediate shaft and the transmission sleeve.

[0015] Furthermore, the outer circumferential surface of the rear end of the load-bearing sleeve includes a second threaded section, and an adjusting nut and a thrust sleeve are threadedly connected to the outside of the second threaded section. The thrust sleeve is located behind the adjusting nut, and the front end face of the thrust sleeve is used to stop and cooperate with the adjusting nut. The keyed threaded bushing automatic installation tool also includes a housing, and the rear end of the thrust sleeve is used to stop and cooperate with the outer surface of the housing.

[0016] The beneficial effects of this invention are as follows: This invention proposes a pioneering automatic installation tool for keyed threaded bushings. The tool includes a mandrel and a load-bearing sleeve. The front end of the mandrel has an external thread, allowing the keyed threaded bushing to be screwed onto the mandrel 1-2 turns during installation. The rear end of the mandrel is connected to a rotary power output mechanism, which automatically controls the rotation of the mandrel, thereby installing the threaded bushing onto the substrate. The load-bearing sleeve is fitted outside the mandrel, and both can move relative to each other in the axial and circumferential directions. That is, when the mandrel rotates to install the threaded bushing, the load-bearing sleeve will not move or interfere with it. Furthermore, when the mandrel is fixed, the load-bearing sleeve can move axially independently. The front end of the load-bearing sleeve is a pressing end for pressing the key, while the rear end of the load-bearing sleeve is connected to a direct-acting power output mechanism to directly drive the pressing end of the load-bearing sleeve. The pressure end is moved towards the key, pressing the key into the base. Then, the rotary power output mechanism controls the mandrel to reverse and exit the threaded bushing, completing the installation of the keyed threaded bushing. Alternatively, the rotary power output mechanism includes a drive shaft and a drive sleeve that are axially guided and circumferentially anti-rotationally fitted. That is, one of the drive shaft and drive sleeve can drive the other to rotate, and when one is fixed, the other can move axially. The circumferential anti-rotation fit of the drive shaft and drive sleeve enables the mandrel to rotate to install the threaded bushing. The drive shaft or drive sleeve cooperates with the direct-acting power output mechanism. After the threaded bushing is installed, the direct-acting power output mechanism can apply tension to the mandrel through the drive shaft or drive sleeve, indirectly causing the pressure end of the bearing sleeve to move towards the key, pressing the key into the base, thus achieving the installation of the key.

[0017] In summary, the automatic installation tool for keyed threaded bushings of the present invention relies on two power mechanisms to realize the installation of threaded bushings and key pins respectively. The two installation processes do not affect each other, realizing automatic operation. It can replace traditional manual operation, improve installation efficiency, and reduce labor intensity. Attached Figure Description

[0018] Figure 1 This is an internal structural diagram of the automatic installation tool for keyed threaded bushings in this invention;

[0019] Figure 2 This is a schematic diagram illustrating the composition principle of the automatic installation tool for keyed threaded bushings in this invention.

[0020] Figure 3 This is a perspective view of the mounting connector module of the automatic mounting tool for keyed threaded bushings in this invention;

[0021] Figure 4 This is a cross-sectional view of the mounting connector module of the automatic mounting tool for keyed threaded bushings in this invention;

[0022] Figure 5This is a diagram showing the usage status of the installation connector module of the automatic installation tool for keyed threaded bushings in this invention (outer nut not shown);

[0023] Figure 6 for Figures 3-5 A three-dimensional view of the load-bearing sleeve for installing the connector module;

[0024] Figure 7 for Figures 3-5 A three-dimensional view of the limiting sleeve for installing the connector module;

[0025] Figure 8 for Figures 3-5 A 3D view of the mandrel for mounting the connector module;

[0026] Figure 9 This is a diagram showing the connection structure between the mounting connector module and the intermediate shaft of the automatic mounting tool for keyed threaded bushings in this invention.

[0027] Figure 10 This is a diagram showing the connection structure between the intermediate shaft and the first drive shaft of the automatic installation tool with keyed threaded bushing in this invention.

[0028] Figure 11 for Figure 1 , Figure 9 and Figure 10 A three-dimensional view of the central axis;

[0029] Figure 12 for Figure 9 A three-dimensional view of the second joint cylinder;

[0030] Figure 13 for Figure 9 A three-dimensional view of the first joint cylinder in the middle;

[0031] Figure 14 for Figure 1 and Figure 10 A three-dimensional view of the first drive shaft in the process;

[0032] Figure 15 for Figure 10 A three-dimensional view of the intermediate transmission sleeve;

[0033] Figure 16 for Figure 1 and Figure 10 A three-dimensional view of the central transmission threaded sleeve;

[0034] Figure 17 This is a diagram showing the installation structure of the transmission threaded sleeve in the automatic installation tool for keyed threaded bushings of the present invention.

[0035] Figure 18 for Figure 17 Structural diagram of the intermediate gear sleeve;

[0036] Figure 19This is a diagram illustrating the usage process (first step) of the automatic installation tool for keyed threaded bushings in this invention;

[0037] Figure 20 This is a diagram illustrating the usage process (second step) of the automatic installation tool for keyed threaded bushings in this invention.

[0038] In the diagram: 1. Mandrel; 1-1. First external thread; 1-2. Second external thread; 1-3. Anti-rotation part; 2. Bearing sleeve; 2-1. First threaded section; 2-2. Second threaded section; 2-3. Smooth section; 2-4. First protruding structure; 2-5. Second protruding structure; 2-6. Insertion groove; 2-7. Stopping step; 3. Limiting sleeve; 3-1. Rear flange; 3-2. First lug; 3-3. Second lug; 3-4. First groove; 3-5. Second groove; 4. Outer nut; 4-1. Front flange; 5. Adjusting nut; 6. Keyed threaded bushing; 6-1. Threaded bushing; 6-2. Pin key; 7. Base; 8. Thrust sleeve; 9. Intermediate shaft; 9-1. Third threaded section; 9-2. Mounting groove; 9-3. First hexagonal head; 10. Pressure sensor; 11. Housing; 12. Gear sleeve; 12-1 Gear section; 12-2 Sleeve section; 12-3 Third annular groove; 13 First drive shaft; 13-1 Second hexagonal head; 14 Displacement sensor; 15 Rotary power motor; 16 Second drive gear; 17 First drive gear; 18 Direct drive motor; 19 Drive screw sleeve; 19-1 First annular groove; 19-2 Retaining edge; 20 Third drive gear; 21 Spring; 22 First anti-rotation pin; 23 First connector sleeve; 23-1 Hexagonal; 23-2 Pin hole; 24 Second connector sleeve; 24-1 First hexagonal hole; 25 Drive sleeve; 25-1 Second hexagonal hole; 25-2 Second annular groove; 26 Fixing rod; 27 Bolt; 28 Mounting bracket; 29 Flat thrust bearing; 30 Limiting plate; 31 Second anti-rotation pin; 32 Second drive shaft. Detailed Implementation

[0039] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0040] The automatic installation tool for keyed threaded bushings provided by this invention relies on two power mechanisms to install the threaded bushing and the key respectively. The two installation processes do not affect each other, realizing automatic operation. It can replace the traditional manual operation, improve installation efficiency, and reduce labor intensity.

[0041] Specifically, an embodiment of the automatic installation tool for keyed threaded bushings (hereinafter referred to as the installation tool) in this invention is as follows:

[0042] like Figure 1 and Figure 2As shown, the installation tool includes three main modules: an installation connector module, a power module, and a control system module. The power module includes a housing 11 and a rotary power output mechanism and a direct power output mechanism disposed within the housing 11. The direct power output mechanism includes a direct power motor 18, and the rotary power output mechanism includes a rotary power motor 15.

[0043] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the mounting connector module includes a mandrel 1 with its axis extending in the front-rear direction and a load-bearing sleeve 2, which are combined with... Figure 8 As shown, the front end of the mandrel 1 is provided with an external thread for matching and connecting with the internal thread hole of the keyed threaded bushing 6, namely the first external thread 1-1. The rear end of the mandrel 1 is provided with a second external thread 1-2 and an anti-rotation part 1-3. The second external thread 1-2 and the anti-rotation part 1-3 are connected to the rotary power output mechanism for transmission. During installation, the keyed threaded bushing 6 can be screwed onto the first external thread 1-1 by 1 to 2 turns. The rotary power output mechanism automatically controls the rotation of the mandrel 1, thereby realizing the installation of the threaded bushing 6-1 onto the base 7.

[0044] The load-bearing sleeve 2 is fitted onto the outside of the mandrel 1, and both can move relative to each other in the axial and circumferential directions. That is, when the mandrel 1 rotates to install the threaded bushing 6-1, the load-bearing sleeve 2 will not move or interfere with it. Furthermore, when the mandrel 1 is fixed, the load-bearing sleeve 2 can also move axially independently. The front end of the load-bearing sleeve 2 is a pressing end for pressing the key 6-2, such as... Figure 4 , Figure 5 and Figure 6 As shown, the outer circumferential surface of the load-bearing sleeve 2 includes a smooth rod section 2-3 and a first threaded section 2-1. The first threaded section 2-1 is located behind the smooth rod section 2-3. A limiting sleeve 3 is fitted around the smooth rod section 2-3. The front end face of the limiting sleeve 3 is a pressing surface for pressing against the base 7. When the threaded bushing 6-1 is installed in place, the pressing surface of the limiting sleeve 3 presses against the base 7. A limiting space is formed between the front end of the limiting sleeve 3 and the mandrel 1 to limit the pin key 6-2, which can prevent the pin key 6-2 from undergoing radial deformation during the pressing process.

[0045] An elastic element, specifically a spring 21, is provided between the limiting sleeve 3 and the load-bearing sleeve 2 to apply a forward force to the limiting sleeve 3. An outer nut 4 is externally connected to the first threaded section 2-1. The front end of the outer nut 4 has a front stop 4-1, and the rear end of the limiting sleeve 3 has a rear stop 3-1 (e.g., ...). Figure 4 , Figure 5 and Figure 7 As shown), the rear guardrail 3-1 is located behind the front guardrail 4-1 and engages with the front guardrail 4-1 in the front-rear direction (as shown). Figure 4As shown, the spring 21 is located inside the outer nut 4, with one end pressing against the stepped surface of the load-bearing sleeve 2 and the other end pressing against the rear stop 3-1.

[0046] like Figure 5 , Figure 6 and Figure 7 As shown, the rear end of the limiting sleeve 3 is provided with rearwardly extending lugs. There are two lugs, namely the first lug 3-2 and the second lug 3-3, which are symmetrically arranged. The load-bearing sleeve 2 is provided with a stop step 2-7 for stopping the rearward movement of the lugs. The load-bearing sleeve 2 is also provided with two insertion grooves 2-6 for the lugs to extend into. There are also two insertion grooves 2-6, which are symmetrically arranged. The circumferential position of the limiting sleeve 3 relative to the load-bearing sleeve 2 when rotating includes the stop position for the lugs and the stop step 2-7 to stop each other in the front and rear, and also includes the movable position for the lugs and the insertion grooves 2-6 to correspond so that the limiting sleeve 3 and the load-bearing sleeve 2 can move relative to each other in the axial direction. Before installing the keyed threaded bushing 6, first rotate the limiting sleeve 3 to the stop position. During installation, as the threaded bushing 6-1 continuously enters the mounting hole of the base 7, the front end face of the limiting sleeve 3 eventually presses against the base 7. At this time, due to the blocking effect of the lug and the stop step 2-7, the limiting sleeve 3 cannot move backward, that is, the entire mounting joint module cannot move forward, thereby controlling the depth of the threaded bushing 6-1 screwed into the base 7.

[0047] To facilitate adjustment of the circumferential position of the limiting sleeve 3, such as Figure 5 and Figure 6 As shown, on the outer circumferential surface of the smooth rod section 2-3, there are respectively a first protruding structure 2-4 for circumferentially blocking the first lug 3-2 to limit the positive rotation limit of the limiting sleeve 3, and a second protruding structure 2-5 for limiting the reverse rotation limit of the limiting sleeve 3. Both the first protruding structure 2-4 and the second protruding structure 2-5 are small cylinders of a certain length. The first protruding structure 2-4 is located at the opening of one of the insertion grooves 2-6, and the second protruding structure 2-5 is located at the middle position circumferentially between the two insertion grooves 2-6. When the first lug 3-2 blocks the first protruding structure 2-4, the limiting sleeve 3 is in the movable position; when the first lug 3-2 blocks the second protruding structure 2-5, the limiting sleeve 3 is in the blocked position. To avoid affecting the axial movement between the limiting sleeve 3 and the load-bearing sleeve 2, as follows... Figure 7 As shown, the limiting sleeve 3 is also provided with a first groove 3-4 for the first protruding structure 2-4 to extend into when it is in the said active position, and a second groove 3-5 for the second protruding structure 2-5 to extend into. The arrangement of the two grooves corresponds to the position of the two protruding structures, that is, the first groove 3-4 is set close to the first lug 3-2, and the second groove 3-5 is located in the middle position of the two lugs in the circumferential direction.

[0048] like Figure 9 As shown, the rotary power output mechanism includes an intermediate shaft 9 disposed on the rear side of the spindle 1. The rear end of the intermediate shaft 9 is located inside the housing 11, and the front end is located outside the housing 11. The front end of the intermediate shaft 9 is connected to the rear end of the spindle 1 via a joint structure. The joint structure includes a first joint cylinder 23, into which the front end of the intermediate shaft 9 and the rear end of the spindle 1 respectively extend and connect. Further, the joint structure also includes a second joint cylinder 24 sleeved outside the first joint cylinder 23 and engaging with it to prevent rotation. Figure 12 As shown, the inner hole of the second connector cylinder 24 is the first hexagonal hole 24-1, as... Figure 13 As shown, the outer circumferential surface of the first connector cylinder 23 is a hexagonal face 23-1, which matches the first hexagonal hole 24-1 to achieve an anti-rotation fit between the two connector cylinders.

[0049] The inner hole of the first connector sleeve 23 is a threaded hole. The front end of the intermediate shaft 9 and the rear end of the mandrel 1 are respectively threaded to the first connector sleeve 23. That is, the second external thread 1-2 at the rear end of the mandrel 1 is threaded to the inner hole of the first connector sleeve 23. At the same time, the anti-rotation part 1-3 at the rear end of the mandrel 1 is inserted into the first hexagonal hole 24-1 and engages with the first hexagonal hole 24-1 to prevent rotation. In addition, as shown in the figure... Figure 11 As shown, the front end of the intermediate shaft 9 is provided with a third threaded section 9-1, which is threadedly connected to the first connector sleeve 23. Since the intermediate shaft 9 drives the spindle 1 to rotate in both directions through the connector structure, in order to prevent the intermediate shaft 9 from becoming loose from the first connector sleeve 23 during rotation, the third threaded section 9-1 at the front end of the intermediate shaft 9 is connected to the first connector sleeve 23 by a first anti-rotation pin 22. Therefore, an installation groove 9-2 for installing the first anti-rotation pin 22 is provided on the third threaded section 9-1, and a pin hole 23-2 is provided on the first connector sleeve 23.

[0050] In use, the torque from the intermediate shaft 9 is first transmitted to the first connector cylinder 23, then to the second connector cylinder 24 through the anti-rotation fit between the first connector cylinder 23 and the second connector cylinder 24, and then to the mandrel 1 through the anti-rotation fit between the second connector cylinder 24 and the anti-rotation part 1-3, thereby driving the mandrel 1 to rotate and realize the installation of the threaded bushing 6-1. The reverse is also the same. When installing the key 6-2, the limiting sleeve 3 is first rotated to the above-mentioned movable position, and then the direct-acting power output mechanism applies a backward pulling force to the intermediate shaft 9. Since the intermediate shaft 9 and the mandrel 1 are both threadedly connected to the first connector cylinder 23, a backward pulling force can be directly applied to the mandrel 1 through this connection. In fact, the base 7 is fixed, so the limiting sleeve 3 will move backward relative to the mandrel 1 (equivalent to the mandrel 1 moving backward with the base 7 to squeeze the limiting sleeve 3, and the limiting sleeve 3 is in the movable position and can move backward). The effect is that the load-bearing sleeve 2 moves forward, thereby pressing the key 6-2 into the base 7.

[0051] Of course, the above process requires a prerequisite: the rear end of the load-bearing sleeve 2 must have a supporting structure; otherwise, the load-bearing sleeve 2 will not be able to push the key 6-2 to move. Figure 6 As shown, the outer circumferential surface of the rear end of the load-bearing sleeve 2 includes the second threaded section 2-2, as... Figure 9 As shown, the second threaded section 2-2 is externally threaded with an adjusting nut 5 and a thrust sleeve 8. The thrust sleeve 8 is located behind the adjusting nut 5. The front end of the thrust sleeve 8 is used to engage with the adjusting nut 5, and the rear end of the thrust sleeve 8 is used to engage with the outer surface of the housing 11, thereby providing stable support for the load-bearing sleeve 2. Specifically, the rear end of the thrust sleeve 8 can be directly engaged with the housing 11, or a screw can be installed on the thrust sleeve 8 to engage with the housing 11. Through the threaded connection between the thrust sleeve 8 and the load-bearing sleeve 2, the axial position between them can be adjusted, and the position of the front end of the load-bearing sleeve 2 can be changed to obtain a suitable top-pressing key effect. By setting the adjusting nut 5, the positions of the thrust sleeve 8 and the load-bearing sleeve 2 can be locked to prevent loosening.

[0052] like Figure 10 As shown, the rotary power output mechanism includes a first drive shaft 13 guided axially and anti-rotationally fitted circumferentially, and a drive sleeve 25. That is, one of the first drive shaft 13 and the drive sleeve 25 can drive the other to rotate, and when one is fixed, the other can move axially. The rear end of the intermediate shaft 9 extends into the drive sleeve 25 and is anti-rotationally fitted with the drive sleeve 25, as shown. Figure 15 As shown, the inner hole of the transmission sleeve 25 is a second hexagonal hole 25-1, as... Figure 11As shown, a first hexagonal head 9-3 is provided at the rear end of the intermediate shaft 9. The first hexagonal head 9-3 is inserted into the second hexagonal hole 25-1 and engages with the second hexagonal hole 25-1 to prevent rotation, ensuring that the torque of the transmission sleeve 25 can be transmitted to the intermediate shaft 9. In order to ensure that the transmission sleeve 25 can apply tension to the intermediate shaft 9, a second anti-rotation pin 31 is also installed between the intermediate shaft 9 and the transmission sleeve 25.

[0053] like Figure 14 As shown, a second hexagonal head 13-1 is provided at the front end of the first drive shaft 13. The second hexagonal head 13-1 is also inserted into the second hexagonal hole 25-1 and engages with the second hexagonal hole 25-1 to prevent rotation. Figure 1 As shown, the rear end of the first drive shaft 13 is connected to the output end of the rotary power motor 15, or the output end of the rotary power motor 15 can be connected to a reducer, and the rear end of the first drive shaft 13 is connected to the output end of the reducer, so that the output torque of the rotary power motor 15 is transmitted to the first drive shaft 13, and then to the transmission sleeve 25.

[0054] like Figure 1 and Figure 10 As shown, the direct-acting power output mechanism includes a transmission sleeve 19 sleeved outside the first transmission shaft 13 and having threads on its outer circumferential surface. The front end of the transmission sleeve 19 and the rear end of the transmission sleeve 25 are axially stopped and circumferentially rotated together. That is, when the transmission sleeve 25 rotates, the transmission sleeve 19 remains stationary and does not affect its rotation; when the transmission sleeve 19 moves axially, it can drive the transmission sleeve 25 to move axially. Specifically, as... Figure 16 As shown, the transmission threaded sleeve 19 includes a sleeve body and a convex ring disposed at the front end of the sleeve body, the convex ring having an outer diameter larger than the outer diameter of the sleeve body. A first annular groove 19-1 is provided inside the convex ring, and a retaining edge 19-2 is provided on the front side of the first annular groove 19-1. (As shown...) Figure 15 As shown, the rear end of the transmission sleeve 25 is provided with a second annular groove 25-2, which makes the rear end of the transmission sleeve 25 also form an annular protrusion. The annular protrusion is engaged in the first annular groove 19-1, and the retaining edge 19-2 is engaged in the second annular groove 25-2, thereby realizing the above-mentioned axial blocking and mutual rotational cooperation in the circumferential direction.

[0055] like Figure 1 and Figure 17 As shown, the transmission sleeve 19 is externally threaded to a gear sleeve 12 with teeth on its outer circumferential surface, as... Figure 18As shown, the gear sleeve 12 includes a gear portion 12-1 and a sleeve portion 12-2. The outer circumferential surface of the sleeve portion 12-2 is smooth and has a third annular groove 12-3. The gear sleeve 12 is rotatably mounted inside the housing 11. Specifically, a mounting bracket 28 is provided inside the housing 11, and the gear sleeve 12 is mounted on the mounting bracket 28. A limiting plate 30 is fixed to the mounting bracket 28 by bolts 27. The limiting plate 30 is engaged in the third annular groove 12-3. A planar thrust bearing 29 is also provided between the limiting plate 30 and the mounting bracket 28. The sleeve portion 12-2 cooperates with the planar thrust bearing 29 to ensure the smooth rotation of the gear sleeve 12.

[0056] A gear transmission structure is provided between the output end of the direct-drive motor 18 and the gear sleeve 12, as detailed below. Figure 1 and Figure 17 As shown, the gear transmission structure includes a first transmission gear 17 disposed on the output end of the direct-drive motor 18, a second transmission gear 16 meshing with the first transmission gear 17, the second transmission gear 16 being mounted on the rear end of the second transmission shaft 32, and a third transmission gear 20 being mounted on the front end of the second transmission shaft 32, the third transmission gear 20 meshing with the gear sleeve 12.

[0057] In addition, such as Figure 16 and Figure 17 As shown, a fixing rod 26 is fixed to the rear end face of the transmission sleeve 19. The control system module includes a displacement sensor 14 installed inside the housing 11. The fixing rod 26 is connected to the measuring end of the displacement sensor 14. On the one hand, it can detect the axial displacement of the transmission sleeve 19 to determine the insertion depth of the key; on the other hand, it can prevent the transmission sleeve 19 from rotating. Thus, when the direct-drive motor 18 starts, it drives the gear sleeve 12 to rotate through the gear transmission structure. Since the gear sleeve 12 only rotates, under the action of the screw nut mechanism, the transmission sleeve 19 generates axial direct motion, which can then apply a backward pulling force to the transmission sleeve 25, and consequently, a backward pulling force to the intermediate shaft 9. Of course, other structures can also be used to prevent the transmission sleeve 19 from rotating, such as providing an axially extending guide groove on the sleeve body and a guide block extending into the guide groove on the mounting bracket 28. In addition, corresponding buttons can be provided on the housing to facilitate the starting and stopping of the two motors.

[0058] In addition, the control system module includes a pressure sensor 10 housed within the housing 11. This sensor detects the magnitude of the tension applied by the transmission sleeve 19 to the transmission sleeve 25, thereby determining the pressure exerted on the key. The pressure sensor 10 and displacement sensor 14 are hardware components, used to monitor real-time force and displacement changes during product installation, providing data for intelligent control. Furthermore, the control system module includes a software component. This software processes real-time data during installation, providing calculations for automated installation. It features automatic feedback compensation, adjusts processing parameters to ensure batch consistency in product installation quality, and records and retains installation process parameters.

[0059] The process of using the automatic installation tool for keyed threaded bushings in this invention is as follows:

[0060] First, connect the installation tool to the power supply. Select the corresponding installation connector module according to the specifications of the keyed threaded bushing product being installed. Then, adjust the positions of the thrust sleeve 8 and adjusting nut 5 according to the installation size requirements to meet the product installation requirements. Finally, rotate the limit sleeve 3 to the stop position. Then... Figure 19 As shown, gently screw the keyed threaded bushing 6 into the mandrel 1 about 2 turns (at this time, the key 6-2 is installed on the threaded bushing 6-1), and then proceed as follows. Figure 20 As shown, align the product with the threaded hole on the base 7, start the rotary power motor 15, and through a series of transmissions, the mandrel 1 rotates. At this time, due to the friction between the threaded pairs, the friction between the first external thread 1-1 of the mandrel 1 and the keyed threaded bushing 6 is less than the friction between the keyed threaded bushing 6 and the threaded hole of the base 7. Therefore, the mandrel 1 continues to rotate forward relative to the keyed threaded bushing 6 (equivalent to the keyed threaded bushing 6 moving backward). When the mandrel 1 and the keyed threaded bushing 6 are installed in place, the mandrel 1 drives the keyed threaded bushing 6 to rotate forward synchronously, so that the threaded bushing 6-1 is installed into the threaded hole of the base 7 (equivalent to the base 7 moving backward). At this time, the front end face of the limiting sleeve 3 stops with the base 7, and it is considered that the threaded bushing 6-1 is installed in the designated position. Then, the limiting sleeve 3 is rotated to the movable position, and the direct-drive power motor 18 is started. Through a series of transmissions, a backward pulling force is applied to the mandrel 1, causing the load-bearing sleeve 2 to move forward and press the key pin 6-2 into the base 7. Finally, the rotary power motor 15 is started, causing the mandrel 1 to rotate in the opposite direction and retract the threaded bushing 6-1, thus completing the entire process of installing the keyed threaded bushing.

[0061] The automatic installation tool for keyed threaded bushings provided by this invention can improve installation efficiency, reduce manual labor intensity, accurately control the installation position, and avoid damage to the base material due to incomplete or excessive installation; it also has installation pressure and installation speed adjustment functions to prevent deformation of the key; it also has real-time monitoring, feedback and automatic compensation functions for installation force; and it also has installation parameter visualization and saving functions; it can ensure product installation consistency and improve quality reliability.

[0062] In other embodiments of the automatic installation tool for keyed threaded bushings: the rear end of the load-bearing sleeve may not be connected to the adjusting nut; instead, the thrust sleeve can be directly threaded to the rear end of the load-bearing sleeve, achieving positional adjustment between the two. In other embodiments, if the installation tool is only for installing one type of keyed threaded bushing, the thrust sleeve can be omitted, with the rear end of the load-bearing sleeve directly stopping against the housing, or other support structures can be provided on the housing to provide support for the load-bearing sleeve.

[0063] In other embodiments of the automatic installation tool for keyed threaded bushings: a displacement sensor may not be installed inside the housing, and a fixing rod is not required on the transmission threaded sleeve. In this case, the displacement of the bearing sleeve forward can be limited by controlling the amount of backward movement of the limiting sleeve. For example, the length of the lug and the depth of the insertion groove can be designed. When the lug extends a certain distance, it will stop and cooperate with the groove wall, preventing the limiting sleeve from moving backward and thus preventing the bearing sleeve from pressing the key forward, thereby controlling the amount of key pressing.

[0064] In other embodiments of the automatic installation tool with keyed threaded bushings: the gear transmission structure between the output end of the direct-drive motor and the gear sleeve can also be in other forms, such as adding another stage of gear reduction, or the output end of the direct-drive motor is directly equipped with a transmission gear that meshes with the gear sleeve, or the teeth on the gear sleeve can also be bevel teeth, so that the gear meshing with it is a bevel gear, or a certain gear pair in the gear transmission structure is a bevel gear transmission.

[0065] In other embodiments of the automatic installation tool for keyed threaded bushings: the axial stop and circumferential rotational fit between the drive threaded sleeve and the drive sleeve can also be such that the front end of the drive threaded sleeve is directly fitted onto the outside of the drive sleeve, and a screw with its axis extending radially is installed on the drive threaded sleeve. The end of the screw passes through the drive threaded sleeve and extends into the annular groove on the drive sleeve, but does not press against the bottom wall of the annular groove.

[0066] In other embodiments of the automatic installation tool for keyed threaded bushings: the direct-acting power output mechanism may not be in the form of a motor and gear transmission structure, but rather a mechanism capable of directly outputting telescopic power, such as a hydraulic cylinder, pneumatic cylinder, or electric push rod. The telescopic end of the mechanism is directly connected to the transmission sleeve, but the connection must not affect the normal rotation of the transmission sleeve. For example, a ring that is axially limited but can rotate relative to the transmission sleeve can be fitted outside the transmission sleeve, and the telescopic end of the mechanism is connected to the ring.

[0067] In other embodiments of the automatic installation tool for keyed threaded bushings: the connector structure may not include a second connector sleeve. For example, if the front end of the intermediate shaft and the rear end of the mandrel are both threadedly connected to the first connector sleeve and are equipped with anti-rotation pins, then the second connector sleeve can be completely omitted. Alternatively, in other embodiments, the front end of the intermediate shaft and the rear end of the mandrel can be hexagonal heads, and the inner hole of the first connector sleeve can be a hexagonal hole. The hexagonal heads of the intermediate shaft and mandrel are respectively inserted into the hexagonal hole to engage with the first connector sleeve for anti-rotation. Simultaneously, anti-rotation pins are installed between the intermediate shaft, mandrel, and the first connector sleeve, in which case the second connector sleeve can also be omitted.

[0068] In other embodiments of the automatic installation tool for keyed threaded bushings: the intermediate shaft can be omitted, and the rear end of the mandrel can be directly connected to the transmission sleeve, in which case the joint structure can also be omitted.

[0069] In other embodiments of the automatic installation tool for keyed threaded bushings: the first and second protrusion structures on the load-bearing sleeve can be omitted, as can the first and second grooves on the limiting sleeve. In this case, a hollow hole can be set on the outer nut to observe the position of the lug, or the limiting sleeve can be rotated directly, and then the limiting sleeve can be gripped and moved backward. If it cannot be moved, it means that the limiting sleeve is in the stopped position; otherwise, if it can move backward, it means that it is in the active position.

[0070] In other embodiments of the automatic installation tool for keyed threaded bushings: there can be only one lug, and only one corresponding insertion slot. In other embodiments, the limiting sleeve may not have a lug. Within a certain degree of spring compression, the limiting sleeve can always move backward relative to the load-bearing sleeve. In this case, the limiting sleeve is no longer used to position the threaded bushing's screw-in depth. Instead, the number of motor rotations is pre-designed, and the screw-in depth of the threaded bushing is controlled by controlling the motor. Of course, the screw-in depth of the threaded bushing can also be controlled by visual observation and manual control of the motor's stop.

[0071] In other embodiments of the automatic installation tool with keyed threaded bushings: the elastic element may also be a rubber sleeve.

[0072] In other embodiments of the automatic installation tool for keyed threaded bushings: the outer nut may not be provided. In this case, the setting method of the elastic element remains unchanged. The limiting sleeve has an axially extending elongated hole. A screw is threaded through the elongated hole and connected to the load-bearing sleeve (the screw does not penetrate the load-bearing sleeve to avoid affecting the movement of the mandrel). In this case, the limiting sleeve can still move backward and compress the elastic element. A limiting space for limiting the key can still be formed between the front end of the limiting sleeve and the mandrel.

[0073] In other embodiments of the automatic installation tool for keyed threaded bushings: instead of indirectly moving the top pressure end of the bearing sleeve toward the key by applying tension to the mandrel, the rear end of the bearing sleeve is connected to a direct-drive power output mechanism to directly drive the top pressure end of the bearing sleeve to move toward the key. In this case, the direct-drive power output mechanism can be a cylinder, a hydraulic cylinder, or an electric actuator, and the telescopic end of the mechanism can be directly connected to the bearing sleeve.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. An automatic installation tool for keyed threaded bushings, characterized in that, The system includes a mandrel and a load-bearing sleeve, both extending along their axes in the front-rear direction. The mandrel has an external thread at its front end for mating with an internal threaded hole of a keyed threaded bushing, and its rear end is connected to a rotary power output mechanism. The load-bearing sleeve is fitted around the mandrel, and both can move relative to each other in the axial and circumferential directions. The front end of the load-bearing sleeve is a pressing end for pressing down a key. The rotary power output mechanism includes a drive shaft and a drive sleeve that are axially guided and circumferentially anti-rotationally fitted. The drive shaft or drive sleeve cooperates with the direct-acting power output mechanism so that the drive shaft or drive sleeve applies a tensile force to the mandrel, thereby indirectly... The top pressure end of the load-bearing sleeve moves towards the key. The direct-acting power output mechanism includes a transmission sleeve fitted outside the drive shaft and having threads on its outer circumferential surface. The front end of the transmission sleeve and the rear end of the transmission sleeve are axially blocked and rotate relative to each other in the circumferential direction. The external thread of the transmission sleeve is connected to a gear sleeve with teeth on its outer circumferential surface. The keyed threaded bushing automatic installation tool also includes a housing. The gear sleeve is rotatably installed in the housing. The direct-acting power output mechanism also includes a direct-acting power motor installed in the housing and a gear transmission structure installed between the output end of the direct-acting power motor and the gear sleeve.

2. The automatic installation tool for keyed threaded bushings according to claim 1, characterized in that, The outer circumferential surface of the load-bearing sleeve includes a smooth rod section and a first threaded section. A limiting sleeve is fitted outside the smooth rod section. The front end face of the limiting sleeve is a pressing surface for pressing the base. An elastic element for applying a forward force to the limiting sleeve is provided between the limiting sleeve and the load-bearing sleeve. A limiting space for limiting the pin key is formed between the front end of the limiting sleeve and the mandrel. The first threaded section is located behind the smooth rod section. An outer nut is connected to the outside of the first threaded section. A front flange is provided at the front end of the outer nut. A rear flange is provided at the rear end of the limiting sleeve. The rear flange is located behind the front flange and is in a stop-fitting engagement with the front flange in the front-rear direction.

3. The automatic installation tool for keyed threaded bushings according to claim 2, characterized in that, The rear end of the limiting sleeve is provided with a rearwardly extending lug, and the load-bearing sleeve is provided with a stop step for stopping the rearward movement of the lug. The load-bearing sleeve is also provided with an insertion groove for the lug to extend into. The circumferential position of the limiting sleeve relative to the load-bearing sleeve when rotating includes a stop position for the lug and the stop step to stop in a front-to-back stop fit, and also includes a movable position for the lug and the insertion groove to correspond so that the limiting sleeve and the load-bearing sleeve can move relative to each other along the axial direction.

4. The automatic installation tool for keyed threaded bushings according to claim 3, characterized in that, The outer circumferential surface of the bare rod section is provided with a first protrusion structure for engaging with the lug in the circumferential direction to limit the forward rotation limit of the limiting sleeve, and a second protrusion structure for limiting the reverse rotation limit of the limiting sleeve. When the lug engages with the first protrusion structure, the limiting sleeve is in the movable position. When the lug engages with the second protrusion structure, the limiting sleeve is in the stopped position. The limiting sleeve is also provided with a first groove for the first protrusion structure to extend into when it is in the movable position, and a second groove for the second protrusion structure to extend into.

5. The automatic installation tool for keyed threaded bushings according to any one of claims 1 to 4, characterized in that, The rotary power output mechanism includes an intermediate shaft located on the rear side of the spindle. The front end of the intermediate shaft is connected to the rear end of the spindle via a joint structure. The joint structure includes a first joint cylinder. The front end of the intermediate shaft and the rear end of the spindle extend into the first joint cylinder and are connected to it.

6. The automatic installation tool for keyed threaded bushings according to claim 5, characterized in that, The joint structure also includes a second joint cylinder sleeved outside the first joint cylinder and anti-rotationally engaged with the first joint cylinder. The mandrel is provided with an anti-rotation part that anti-rotationally engages with the inner hole of the second joint cylinder. The front end of the intermediate shaft and the rear end of the mandrel are respectively threaded to the first joint cylinder. An anti-rotation pin is also installed between the front end of the intermediate shaft and the first joint cylinder.

7. The automatic installation tool for keyed threaded bushings according to claim 1, characterized in that, A fixing rod is fixed on the rear end face of the transmission screw sleeve, and a displacement sensor is installed inside the housing. The fixing rod is connected to the measuring end of the displacement sensor.

8. The automatic installation tool for keyed threaded bushings according to claim 1, characterized in that, An intermediate shaft is connected between the transmission sleeve and the spindle. The rear end of the intermediate shaft is located inside the housing, and the front end is located outside the housing. The rear end of the intermediate shaft extends into the transmission sleeve and engages with the transmission sleeve to prevent rotation. An anti-rotation pin is also installed between the intermediate shaft and the transmission sleeve.

9. The automatic installation tool for keyed threaded bushings according to any one of claims 1 to 4, characterized in that, The outer circumferential surface of the rear end of the load-bearing sleeve includes a second threaded section. An adjusting nut and a thrust sleeve are threadedly connected to the outside of the second threaded section. The thrust sleeve is located behind the adjusting nut. The front end face of the thrust sleeve is used to stop the adjusting nut. The keyed threaded bushing automatic installation tool also includes a housing. The rear end of the thrust sleeve is used to stop the outer surface of the housing.

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