A shaft end tempering device for a lead screw

Abstract

The application belongs to the technical field of heat treatment devices, and particularly discloses a shaft end tempering device for a lead screw, which comprises an automatic lifting type carrier roller mechanism, a self-positioning ejector pin mechanism, a fixed base plate, a lead screw clamping and rotating assembly and a heat treatment mechanism, the lead screw clamping and rotating assembly is arranged on the fixed base plate, and the heat treatment mechanism is slidingly arranged on the fixed base plate. In one aspect, the lower supporting carrier roller and the upper pressing wheel part can rigidly limit and fix the lead screw shaft body from the upper and lower directions, so that deformation of the lead screw shaft body in the heat treatment process is avoided. In another aspect, through linkage of the sinking control assembly, the automatic unlocking assembly and the hydraulic control assembly, the unlocking, transmission, resetting and locking of the sinking gear can be automatically completed when the heat treatment mechanism passes, so that the technical goal of automatic sinking and avoiding of the lower supporting carrier roller when the heat treatment mechanism passes is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat treatment devices, and particularly relates to an axle end tempering device for a lead screw. BACKGROUND

[0002] Large lead screw axles need to be quenched, tempered and the like after machining, and the heat treatment has been relatively mature from the process point of view, but the equipment for heat treatment, in particular automatic treatment, still has room for optimization and improvement.

[0003] Large axle parts cannot be placed in the furnace as a whole, and therefore coil induction heating is generally used for heat treatment, and quenching is performed by spraying quenching liquid toward the surface of the part through a water jacket; however, since the coil and the water jacket are complete rings, they need to move along the axial direction of the part, and the middle position of the part cannot have an obstruction, but if the suspended span of the part is too large, bending deformation is easily generated during heat treatment, which is a technical contradiction that must be solved. SUMMARY

[0004] In view of the above, in order to overcome the defects of the prior art, the application provides an axle end tempering device for a lead screw which can automatically sink and avoid position when a heat treatment mechanism passes; on the one hand, the lower supporting roller and the upper pressure wheel part can rigidly limit and fix the lead screw body from the upper and lower directions, so as to avoid deformation of the lead screw body during heat treatment; on the other hand, through linkage of the sinking control assembly, the automatic unlocking assembly and the hydraulic control assembly, the unlocking, transmission, resetting and locking of the sinking gear can be automatically completed when the heat treatment mechanism passes, so as to achieve the technical goal of automatic sinking and avoiding position of the lower supporting roller when the heat treatment mechanism passes.

[0005] Furthermore, in order to simplify the operation process and control structure, the application further provides a self-positioning thimble mechanism which is brought into position by sliding with the movement of the heat treatment mechanism, and can automatically fix the position of the self-positioning thimble mechanism at a suitable position; during the process, the self-positioning thimble mechanism can automatically sense the length of the lead screw body, thereby expanding the application range and practicality of the device.

[0006] The technical scheme adopted by the application is as follows: the application provides an axle end tempering device for a lead screw, which comprises an automatic lifting type roller mechanism, a self-positioning thimble mechanism, a fixed base plate, a lead screw clamping and rotating assembly and a heat treatment mechanism; the lead screw clamping and rotating assembly is arranged on the fixed base plate, and the heat treatment mechanism is slidably arranged on the fixed base plate; the automatic lifting type roller mechanism is arrayed on the fixed base plate, and the self-positioning thimble mechanism is slidably arranged on the fixed base plate.

[0007] Through the bidirectional extrusion of the lower supporting roller and the upper pressing wheel part, the screw shaft body can be rigidly fixed, so that the bending of the screw shaft body caused by stress release during heat treatment is avoided, and the lower supporting roller needs to be automatically lowered to avoid the position where the heat treatment coil and the water jacket pass through.

[0008] Further, the automatic lifting type roller mechanism comprises a lower roller lifting assembly, a lowering control assembly, an automatic unlocking assembly and a hydraulic control assembly, the lower roller lifting assembly is arranged on the fixed bottom plate, the lowering control assembly is arranged on the lower roller lifting assembly, the automatic unlocking assembly is arranged on the lowering control assembly, and the hydraulic control assembly is arranged on the lower roller lifting assembly.

[0009] Through the structural design of the automatic lifting type roller mechanism, the supporting height of the device is adjusted and controlled by using hydraulic pressure, so that it can adapt to screw shaft bodies of different diameters, and in addition, the automatic lifting type roller mechanism can automatically realize the lowering of the self-positioning ejector pin mechanism near the position where the heat treatment mechanism passes through, so that the circular heat treatment coil and the water jacket can be sleeved outside the screw shaft body, and the screw shaft body is heated or quenched.

[0010] As preferred, the lower roller lifting assembly comprises a fixed mounting plate, a lifting slide rod and a lower supporting roller, the fixed mounting plate is fixedly connected to the fixed bottom plate, the fixed mounting plate is symmetrically provided with lifting sleeves, the lifting slide rod is slidingly connected to the lifting sleeves, and the lower supporting roller is fixedly connected to the top end of the lifting slide rod.

[0011] As further preferred, the hydraulic control assembly comprises a hydraulic push rod, a hydraulic pipeline, a control valve, a sliding valve core and a control screw rod, the hydraulic push rod is arranged on the fixed mounting plate, the telescopic end of the hydraulic push rod is arranged at the bottom of the lower supporting roller, the control valve is fixedly connected to the fixed mounting plate, the hydraulic push rod, the hydraulic cavity and the control valve are connected through the hydraulic pipeline, the sliding valve core is slidingly connected to the control valve, the control screw rod is rotatably arranged in the control valve, and the control screw rod and the sliding valve core are in threaded transmission.

[0012] By manually rotating the control screw rod, the sliding of each group of sliding valve cores can be controlled at the same time, so as to control the opening and closing of the control valve, the control valve is opened in the initial state, the height control of each group of lower supporting rollers can be realized at the same time by supplying liquid, and the lower supporting roller can stably support screw shaft bodies of different specifications and different diameters by manual adjustment.

[0013] As preferred, the sedimentation control assembly comprises a hydraulic cavity, a sedimentation screw rod shaft, a sedimentation control piston, a sedimentation gear, a sedimentation driving rack and a piston return spring, the hydraulic cavity is arranged on the fixed mounting plate, the sedimentation screw rod shaft is rotatably arranged in the hydraulic cavity, the sedimentation control piston is slidingly arranged in the hydraulic cavity, the sedimentation control piston is in threaded transmission with the sedimentation screw rod shaft, the piston return spring is arranged between one end of the hydraulic cavity and the sedimentation control piston, the sedimentation gear is fixedly connected to one end of the sedimentation screw rod shaft, the sedimentation gear is annularly and uniformly provided with locking holes, the sedimentation driving rack is arranged on the automatic unlocking assembly, and the sedimentation driving rack is in meshing transmission with the sedimentation gear.

[0014] During the heat treatment process, that is, after all the control valves are completely closed, the position of the sedimentation control piston can be changed by rotating the sedimentation screw rod shaft through the gear and rack transmission, so as to realize the lifting control of the hydraulic push rod, and the automatic lowering of the position of the lower supporting roller through the heat treatment mechanism can realize the automatic sinking of the automatic lifting type roller mechanism.

[0015] As further preferred of the present application, the automatic unlocking assembly comprises a sliding unlocking bracket, a magnetic strip, a locking pin mounting plate, a locking pin sleeve, a locking pin return spring and a magnetic locking pin, the sliding unlocking bracket is arranged on the heat treatment mechanism, the sedimentation driving rack is fixedly connected to the sliding unlocking bracket, the magnetic strip is fixedly connected to the sliding unlocking bracket, the locking pin mounting plate is fixedly connected to the hydraulic cavity, the locking pin sleeve is arranged on the locking pin mounting plate, and the magnetic locking pin is slidingly arranged in the locking pin sleeve; the magnetic strip can apply repulsion to the magnetic locking pin when close to the magnetic locking pin, and the length of the sedimentation driving rack is less than that of the magnetic strip, so as to ensure that the sedimentation gear has enough time to rise and reset after the rotation of the sedimentation gear with the sinking of the lower supporting roller.

[0016] In addition to the position of the heat treatment mechanism, the automatic lifting type roller mechanism at the remaining positions needs to rigidly support the screw rod shaft body, at this time, the sedimentation gear needs to be completely locked, therefore, through the magnetic attraction and repulsion, the locking state of the sedimentation gear can be released when the heat treatment mechanism is about to arrive, and the locking state of the sedimentation gear can be restored after the heat treatment mechanism completely passes; so as to overcome the technical contradiction that the lower supporting roller needs to be sufficiently supported and sunk.

[0017] Further, the self-positioning thimble mechanism comprises a sliding locking assembly, a thimble assembly and an automatic locking assembly, the sliding locking assembly is slidingly arranged on the fixed bottom plate, the thimble assembly is arranged on the sliding locking assembly, and the automatic locking assembly is arranged on the sliding locking assembly.

[0018] The self-positioning ejector pin mechanism can be driven by the reciprocating movement of the heat treatment mechanism to automatically control the position adjustment, position locking and position unlocking of the self-positioning ejector pin mechanism, and the above control effects can be achieved without independent driving mechanism and control module, which greatly simplifies the structure, reduces the cost, and is beneficial to improve the stability and reliability of the whole device.

[0019] As preferred, the sliding locking assembly comprises a sliding guide assembly, a sliding seat, a locking rack, a locking lifting block and a locking block return spring, the sliding guide assembly is arranged on the fixed bottom plate, the sliding seat is arranged on the sliding guide assembly, the sliding seat is provided with a horizontal inclined trapezoidal sliding groove and a vertical vertical sliding groove, the locking rack is fixedly connected to the fixed bottom plate, the locking lifting block is clamped and slidably arranged in the vertical sliding groove, the locking block return spring is arranged between the bottom of the vertical sliding groove and the locking lifting block, and the bottom of the locking lifting block is provided with a locking tooth part matched with the locking rack.

[0020] By driving the locking lifting block to lift, the locking and unlocking control of the self-positioning ejector pin mechanism can be automatically realized, and the lifting driving of the locking lifting block can realize complete automatic control according to the movement direction of the heat treatment mechanism and the relative position of the self-positioning ejector pin mechanism and the heat treatment mechanism through the automatic locking assembly. Furthermore, since the prerequisite for locking the self-positioning ejector pin mechanism is that the ejector pin body and the screw shaft body have a certain extrusion force, the self-positioning ejector pin mechanism also has the technical effect of automatically adapting and matching the screw shaft bodies of different lengths.

[0021] As further preferred, the ejector pin assembly comprises an ejector pin support, an ejector pin body, an ejector pin return spring, an ejector pin sliding sleeve and a hinged connecting rod, the fixed bottom plate is fixedly connected to the sliding seat, the ejector pin body is clamped and slidably arranged in the ejector pin support, the ejector pin body is provided with an ejector pin sleeve ring, the ejector pin return spring is arranged between the ejector pin sleeve ring and the ejector pin support, the ejector pin sliding sleeve is clamped and slidably arranged on the ejector pin body, and the two ends of the hinged connecting rod are respectively hinged to the ejector pin sliding sleeve and the locking lifting block.

[0022] As preferred, the automatic locking assembly comprises a trapezoidal sliding cavity, an inclined sliding block, an inward retraction avoidance spring, a top support locking spring and a trigger inclined push rod, the trapezoidal sliding cavity is clamped and slidably arranged in the trapezoidal sliding groove, the top support locking spring is arranged between the side wall of the trapezoidal sliding groove and the trapezoidal sliding cavity, the inclined sliding block is clamped and slidably arranged in the trapezoidal sliding cavity, the inward retraction avoidance spring is arranged between the trapezoidal sliding cavity and the inclined sliding block, the trigger inclined push rod is fixedly connected to the heat treatment mechanism, and the trigger inclined push rod and the inclined sliding block are in contact and matching.

[0023] Further, the screw clamping and rotating assembly comprises a rotating control mechanism, a three-jaw chuck and a screw shaft body, the rotating control mechanism is arranged on the fixed base plate, the three-jaw chuck is rotatably arranged on the rotating control mechanism, and the screw shaft body is clamped in the three-jaw chuck and placed on the lower supporting roller.

[0024] Further, the heat treatment mechanism comprises a heat treatment moving part, a heat treatment coil, an upper pressing wheel part and a water jacket, the heat treatment moving part is slidably arranged on the fixed base plate, the sliding unlocking support and the trigger inclined push rod are fixedly connected to the heat treatment moving part, the heat treatment coil is arranged on the heat treatment moving part, the heat treatment coil and the screw shaft body are coaxially arranged, the upper pressing wheel part is arranged on the heat treatment moving part, the upper pressing wheel part is located directly above the screw shaft body, the upper pressing wheel part is provided with a ball type pressing wheel, the ball type pressing wheel and the screw shaft body are in rolling contact, and the water jacket is arranged on the heat treatment moving part and coaxially arranged with the screw shaft body.

[0025] The heat treatment coil can inductively heat the screw shaft body from all around, and the water jacket can spray quenching liquid, so that the screw shaft body is quenched, and the quenching and tempering processes are completed at the same station, so that the error problems caused by multiple clamping and the part bending problems caused by stress release in the cooling process can be reduced.

[0026] The above structure of the present application has the following beneficial effects:

[0027] (1) The bidirectional extrusion of the lower supporting roller and the upper pressing wheel part can rigidly fix the screw shaft body, so that the screw shaft body is prevented from being bent due to stress release during heat treatment, and the lower supporting roller needs to be automatically lowered to avoid the positions passed by the heat treatment coil and the water jacket.

[0028] (2) The structure of the automatic lifting type roller mechanism is designed, the supporting height of the device is adjusted and controlled by using hydraulic pressure, so that the automatic lifting type roller mechanism can adapt to screw shaft bodies of different diameters, and the automatic lifting type roller mechanism can also automatically lower the self-positioning ejector pin mechanism near the positions passed by the heat treatment mechanism, so that the heat treatment coil and the water jacket in the form of a ring can be sleeved outside the screw shaft body, and the screw shaft body can be heated or quenched.

[0029] (3) The manual rotation of the joint control screw can simultaneously and batch control the sliding of each group of sliding valve cores, so as to control the opening and closing of the joint control valve, the joint control valve is opened in the initial state, the height control of each group of lower supporting rollers can be realized by supplying liquid, and the lower supporting rollers can stably support screw shaft bodies of different specifications and different diameters by manual adjustment.

[0030] (4) In the heat treatment process, that is, after the full closing of the control valve, the position of the settlement control piston can be changed by rotating the settlement screw shaft through the gear and rack transmission, so as to realize the lifting control of the hydraulic push rod. Through the automatic lowering of the lower supporting roller position when the heat treatment mechanism passes, the automatic lifting type roller mechanism can be automatically settled and avoided.

[0031] (5) In addition to the position of the heat treatment mechanism, the automatic lifting type roller mechanism at the remaining positions needs to rigidly support the screw shaft body. At this time, the settlement gear needs to be completely locked. Therefore, through magnetic attraction and repulsion, the locking state of the settlement gear can be released when the heat treatment mechanism is about to arrive, and the locking state of the settlement gear can be restored after the heat treatment mechanism completely passes; so as to overcome the technical contradiction that the lower supporting roller can be fully supported and settled and avoided.

[0032] (6) The self-positioning thimble mechanism can be driven by the reciprocating motion of the heat treatment mechanism to automatically control the position adjustment, position locking and position unlocking of the self-positioning thimble mechanism. Without the need for independent driving mechanism and control module, the above control effect can be realized, which greatly simplifies the structure, reduces the cost, and is also beneficial to improve the stability and reliability of the whole device.

[0033] (7) The locking and unlocking control of the self-positioning thimble mechanism can be automatically realized by driving the locking block to lift. The lifting drive of the locking block can be automatically locked according to the movement direction of the heat treatment mechanism and the relative position of the self-positioning thimble mechanism and the heat treatment mechanism through the automatic locking assembly. Furthermore, since the prerequisite for locking the self-positioning thimble mechanism is that the thimble body and the screw shaft body have a certain extrusion force, the self-positioning thimble mechanism also has the technical effect of automatically adapting and matching the screw shaft body of different length specifications.

[0034] (8) The heat treatment coil can inductively heat the screw shaft body from all around, and the water jacket can spray quenching liquid to quench the screw shaft body. The present scheme completes the quenching and tempering processes in the same station, which can reduce the error problem caused by multiple clamping and the part bending problem caused by stress release in the cooling process. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A perspective view of a shaft end tempering device for a screw rod is proposed for the present application;

[0036] Figure 2 A front view of a shaft end tempering device for a screw rod is proposed for the present application;

[0037] Figure 3 This is a 3D view of an automatic lifting roller mechanism;

[0038] Figure 4 An exploded view of an automatic lifting idler mechanism;

[0039] Figure 5 This is a front view of an automatic lifting idler mechanism;

[0040] Figure 6 Left view of the automatic lifting idler mechanism;

[0041] Figure 7 for Figure 6 A cross-sectional view along section line AA;

[0042] Figure 8 A 3D view of the self-positioning ejector mechanism;

[0043] Figure 9 An exploded view of a self-positioning ejector mechanism;

[0044] Figure 10 This is the front view of the self-positioning ejector mechanism;

[0045] Figure 11 Left view of the self-positioning ejector mechanism;

[0046] Figure 12 for Figure 10 A cross-sectional view along the cutting line BB;

[0047] Figure 13 for Figure 10 A cross-sectional view along the section line CC;

[0048] Figure 14 for Figure 7 A magnified view of a section at point I;

[0049] Figure 15 for Figure 13 A magnified view of section II in the middle.

[0050] Wherein, 1, automatic lifting roller mechanism, 2, self-positioning needle mechanism, 3, fixed bottom plate, 4, screw clamping and rotating assembly, 5, heat treatment mechanism, 6, lower roller lifting assembly, 7, settling control assembly, 8, automatic unlocking assembly, 9, hydraulic control assembly, 10, fixed mounting plate, 11, lifting slide rod, 12, lower support roller, 13, hydraulic cavity, 14, settling screw shaft, 15, settling control piston, 16, settling gear, 17, settling drive rack, 18, sliding unlocking bracket, 19, magnetic stripe, 20, locking pin mounting plate, 21, locking pin sleeve, 22, magnetic locking pin, 23, hydraulic push rod, 24, hydraulic pipeline, 25, joint control valve, 26, sliding valve core, 27, joint control screw, 28, lifting slide sleeve, 29, locking hole, 30, sliding locking assembly, 31, needle assembly, 32, automatic locking assembly, 33, sliding guide assembly, 34, sliding seat, 35, locking rack, 36, locking lifting block, 37, locking block return spring, 38, needle bracket, 39, needle body, 40, needle return spring, 41, needle slide sleeve, 42, hinged connecting rod, 43, trapezoidal slide cavity, 44, inclined sliding block, 45, inward retraction avoidance spring, 46, supporting locking spring, 47, trigger inclined push rod, 48, trapezoidal slide groove, 49, vertical slide groove, 50, locking tooth portion, 51, needle sleeve ring, 52, three-jaw chuck, 53, rotary control mechanism, 54, screw shaft body, 55, heat treatment moving portion, 56, heat treatment coil, 57, upper press wheel portion, 58, water jacket, 59, ball-type press wheel, 60, piston return spring, 61, locking pin return spring.

[0051] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0053] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0054] As Figures 1-15 The present application proposes a shaft end tempering device for a lead screw, which comprises an automatic lifting type supporting roller mechanism 1, a self-positioning ejector pin mechanism 2, a fixed base plate 3, a lead screw clamping and rotating assembly 4 and a heat treatment mechanism 5. The lead screw clamping and rotating assembly 4 is arranged on the fixed base plate 3, and the heat treatment mechanism 5 is slidingly arranged on the fixed base plate 3. The automatic lifting type supporting roller mechanism 1 is arranged in an array on the fixed base plate 3, and the self-positioning ejector pin mechanism 2 is slidingly arranged on the fixed base plate 3.

[0055] Through the bidirectional extrusion of the lower supporting roller 12 and the upper pressure wheel part 57, the lead screw shaft body 54 can be rigidly fixed, so as to avoid the bending of the lead screw shaft body 54 caused by the stress release during heat treatment. However, at the position where the heat treatment coil 56 and the water jacket 58 pass through, the lower supporting roller 12 needs to be automatically lowered to avoid the heat treatment coil 56 and the water jacket 58.

[0056] The automatic lifting type supporting roller mechanism 1 comprises a lower supporting roller lifting assembly 6, a lowering control assembly 7, an automatic unlocking assembly 8 and a hydraulic control assembly 9. The lower supporting roller lifting assembly 6 is arranged on the fixed base plate 3, the lowering control assembly 7 is arranged on the lower supporting roller lifting assembly 6, the automatic unlocking assembly 8 is arranged on the lowering control assembly 7, and the hydraulic control assembly 9 is arranged on the lower supporting roller lifting assembly 6.

[0057] Through the structural design of the automatic lifting type supporting roller mechanism 1, the supporting height of the device is adjusted and controlled by using hydraulic pressure, so as to adapt to lead screw shaft bodies 54 of different diameters. Furthermore, the automatic lifting type supporting roller mechanism 1 can automatically realize the lowering of the self-positioning ejector pin mechanism 2 near the position where the heat treatment mechanism 5 passes through, so as to ensure that the circular heat treatment coil 56 and the water jacket 58 can be sleeved on the outside of the lead screw shaft body 54, and then the lead screw shaft body 54 can be heated or quenched.

[0058] The lower supporting roller lifting assembly 6 comprises a fixed mounting plate 10, a lifting slide rod 11 and a lower supporting roller 12. The fixed mounting plate 10 is fixedly connected to the fixed base plate 3. The fixed mounting plate 10 is symmetrically provided with lifting slide sleeves 28. The lifting slide rod 11 is slidingly arranged in the lifting slide sleeves 28. The lower supporting roller 12 is fixedly connected to the top end of the lifting slide rod 11.

[0059] The hydraulic control assembly 9 comprises a hydraulic push rod 23, a hydraulic pipeline 24, a joint control valve 25, a sliding valve core 26 and a joint control screw rod 27. The hydraulic push rod 23 is arranged on the fixed mounting plate 10. The extension end of the hydraulic push rod 23 is arranged at the bottom of the lower supporting roller 12. The joint control valve 25 is fixedly connected to the fixed mounting plate 10. The hydraulic push rod 23, the hydraulic cavity 13 and the joint control valve 25 are connected through the hydraulic pipeline 24. The sliding valve core 26 is slidingly arranged in the joint control valve 25. The joint control screw rod 27 is rotationally arranged in the joint control valve 25. The joint control screw rod 27 and the sliding valve core 26 are in threaded transmission.

[0060] By rotating the control wire rod 27 manually, the sliding of each group of sliding spools 26 can be controlled simultaneously and in batches, thereby controlling the opening and closing of the control valve 25. In the initial state, the control valve 25 is opened, and the height control of each group of lower support idlers 12 can be realized simultaneously by supplying liquid. The lower support idlers 12 can be adjusted manually to stably support the wire rod shaft body 54 of different specifications and diameters.

[0061] The settling control assembly 7 includes a hydraulic cavity 13, a settling wire rod shaft 14, a settling control piston 15, a settling gear 16, a settling drive rack 17, and a piston return spring 60. The hydraulic cavity 13 is arranged on the fixed mounting plate 10. The settling wire rod shaft 14 is rotatably arranged in the hydraulic cavity 13. The settling control piston 15 is slidingly arranged in the hydraulic cavity 13 and is in threaded transmission with the settling wire rod shaft 14. The piston return spring 60 is arranged between one end of the hydraulic cavity 13 and the settling control piston 15. The settling gear 16 is fixedly connected to one end of the settling wire rod shaft 14. The settling gear 16 is arranged with a plurality of locking holes 29 in a ring shape. The settling drive rack 17 is arranged on the automatic unlocking assembly 8 and is in meshing transmission with the settling gear 16.

[0062] During the heat treatment process, that is, after the control valve 25 is fully closed, the position of the settling control piston 15 can be changed by rotating the settling wire rod shaft 14 through gear and rack transmission, thereby realizing the lifting control of the hydraulic push rod 23. The automatic lowering of the position of the lower support idler 12 by the heat treatment mechanism 5 can realize the automatic settling avoidance of the automatic lifting idler mechanism 1.

[0063] The automatic unlocking assembly 8 includes a sliding unlocking bracket 18, a magnetic strip 19, a lock pin mounting plate 20, a lock pin sleeve 21, a lock pin return spring 61, and a magnetic lock pin 22. The sliding unlocking bracket 18 is arranged on the heat treatment mechanism 5. The settling drive rack 17 is fixedly connected to the sliding unlocking bracket 18. The magnetic strip 19 is fixedly connected to the sliding unlocking bracket 18. The lock pin mounting plate 20 is fixedly connected to the hydraulic cavity 13. The lock pin sleeve 21 is arranged on the lock pin mounting plate 20. The magnetic lock pin 22 is slidingly arranged in the lock pin sleeve 21. The magnetic strip 19 can exert a repulsive force on the magnetic lock pin 22 when it is close to the magnetic lock pin 22. The length of the settling drive rack 17 is less than the length of the magnetic strip 19, so that after the rotation of the settling gear 16 with the lowering of the lower support idler 12, there is still enough time for the lifting and resetting.

[0064] In addition to the position where the heat treatment mechanism 5 is located, the automatic lifting roller mechanism 1 in the remaining positions needs to be able to provide rigid support to the screw shaft body 54, at which time the sun gear 16 needs to be completely locked, so that through magnetic attraction and repulsion, the locking state of the sun gear 16 can be released in advance when the heat treatment mechanism 5 is about to arrive, and the locking state of the sun gear 16 can be restored after the heat treatment mechanism 5 completely passes; so as to overcome the technical contradiction that the lower supporting roller 12 needs to be able to provide sufficient support and sink to avoid position.

[0065] The self-positioning thimble mechanism 2 includes a sliding locking assembly 30, a thimble assembly 31, and an automatic locking assembly 32. The sliding locking assembly 30 is slidably arranged on the fixed bottom plate 3, the thimble assembly 31 is arranged on the sliding locking assembly 30, and the automatic locking assembly 32 is arranged on the sliding locking assembly 30.

[0066] The self-positioning thimble mechanism 2 can be driven by the reciprocating motion of the heat treatment mechanism 5 to automatically control the position adjustment, position locking, and position unlocking of the self-positioning thimble mechanism 2. Without the need for independent driving mechanisms and control modules, the above control effects can be achieved, which not only greatly simplifies the structure and reduces the cost, but also helps to improve the stability and reliability of the entire device.

[0067] The sliding locking assembly 30 includes a sliding guide assembly 33, a sliding seat 34, a locking rack 35, a locking lifting block 36, and a locking block return spring 37. The sliding guide assembly 33 is arranged on the fixed bottom plate 3, the sliding seat 34 is arranged on the sliding guide assembly 33, the sliding seat 34 is provided with a horizontally inclined trapezoidal sliding groove 48 and a vertical vertical sliding groove 49, the locking rack 35 is fixedly connected to the fixed bottom plate 3, the locking lifting block 36 is slidingly arranged in the vertical sliding groove 49, the locking block return spring 37 is arranged between the bottom of the vertical sliding groove 49 and the locking lifting block 36, and the bottom of the locking lifting block 36 is provided with a locking tooth portion 50 matched with the locking rack 35.

[0068] By driving the locking lifting block 36 to lift, the locking and unlocking control of the self-positioning thimble mechanism 2 can be automatically realized. The lifting drive of the locking lifting block 36 can be completely automatically controlled by the automatic locking assembly 32 according to the movement direction of the heat treatment mechanism 5 and the relative position of the self-positioning thimble mechanism 2 and the heat treatment mechanism 5. In addition, since the prerequisite for locking the self-positioning thimble mechanism 2 is that a certain extrusion force exists between the thimble body 39 and the screw shaft body 54, the self-positioning thimble mechanism 2 also has the technical effect of automatically adapting and matching different lengths of the screw shaft body 54.

[0069] The ejector pin assembly 31 comprises an ejector pin bracket 38, an ejector pin body 39, an ejector pin return spring 40, an ejector pin sleeve 41 and a hinged connecting rod 42, the fixed base plate 3 is fixedly connected to the sliding seat 34, the ejector pin body 39 is clamped and slidably arranged in the ejector pin bracket 38, the ejector pin body 39 is provided with an ejector pin sleeve ring 51, the ejector pin return spring 40 is arranged between the ejector pin sleeve ring 51 and the ejector pin bracket 38, the ejector pin sleeve 41 is clamped and slidably arranged on the ejector pin body 39, and the two ends of the hinged connecting rod 42 are respectively hinged to the ejector pin sleeve 41 and the locking lifting block 36.

[0070] The automatic locking assembly 32 comprises a trapezoidal sliding cavity 43, an inclined sliding block 44, an inward retraction avoidance spring 45, a top support locking spring 46 and a trigger inclined push rod 47, the trapezoidal sliding cavity 43 is clamped and slidably arranged in a trapezoidal sliding groove 48, the top support locking spring 46 is arranged between the side wall of the trapezoidal sliding groove 48 and the trapezoidal sliding cavity 43, the inclined sliding block 44 is clamped and slidably arranged in the trapezoidal sliding cavity 43, the inward retraction avoidance spring 45 is arranged between the trapezoidal sliding cavity 43 and the inclined sliding block 44, the trigger inclined push rod 47 is fixedly connected to the heat treatment mechanism 5, and the trigger inclined push rod 47 is in contact with the inclined sliding block 44.

[0071] The screw rod clamping and rotating assembly 4 comprises a rotating control mechanism 53, a three-jaw chuck 52 and a screw rod shaft body 54, the rotating control mechanism 53 is arranged on the fixed base plate 3, the three-jaw chuck 52 is rotatably arranged on the rotating control mechanism 53, and the screw rod shaft body 54 is clamped in the three-jaw chuck 52 and is arranged on the lower supporting roller 12.

[0072] The heat treatment mechanism 5 comprises a heat treatment moving part 55, a heat treatment coil 56, an upper pressing wheel part 57 and a water jacket 58, the heat treatment moving part 55 is slidably arranged on the fixed base plate 3, the sliding unlocking bracket 18 and the trigger inclined push rod 47 are fixedly connected to the heat treatment moving part 55, the heat treatment coil 56 is arranged on the heat treatment moving part 55, the heat treatment coil 56 and the screw rod shaft body 54 are coaxially arranged, the upper pressing wheel part 57 is arranged on the heat treatment moving part 55 and is located directly above the screw rod shaft body 54, the upper pressing wheel part 57 is provided with a ball type pressing wheel 59, the ball type pressing wheel 59 and the screw rod shaft body 54 are in rolling contact, and the water jacket 58 is arranged on the heat treatment moving part 55 and is coaxially arranged with the screw rod shaft body 54.

[0073] The heat treatment coil 56 can inductively heat the screw rod shaft body 54 from all around, and the water jacket 58 can spray quenching liquid, so that the screw rod shaft body 54 is quenched. The two processes of quenching and tempering are completed at the same station, which can reduce the error problem caused by multiple clamping and the part bending problem caused by stress release in the cooling process.

[0074] In specific use, first, the user needs to open all the associated control valves 25 by rotating the associated control screw 27, and the sliding valve core 26 will slide relative to the associated control valve 25 when the associated control screw 27 is rotating, thereby opening the flow passage that was originally blocked by the sliding valve core 26. At this time, through external piston extrusion, all hydraulic push rods 23 can be controlled to extend synchronously, thereby making the lower support carrier roller 12 synchronously rise to the approximate position.

[0075] Then place the screw shaft body 54 to be processed on the lower support carrier roller 12, and then complete the clamping and fixing of one end of the screw shaft body 54 through the three-jaw chuck 52. Then continue to adjust the height of the lower support carrier roller 12 until the screw shaft body 54 is horizontal as a whole, and then close all the associated control valves 25 by rotating the associated control screw 27.

[0076] Subsequently, control the heat treatment moving part 55 to slide, and in the initial state, the screw clamping and rotating assembly 4 is located between the heat treatment mechanism 5 and the screw shaft body 54. Therefore, when the heat treatment moving part 55 slides, it will first push the inclined sliding block 44 by triggering the inclined push rod 47 and push the self-positioning thimble mechanism 2 as a whole to approach the screw shaft body 54. When the thimble body 39 contacts the tail end of the screw shaft body 54, the heat treatment mechanism 5 continues to slide, and the thimble body 39 will slide relative to the thimble support 38. During the sliding of the thimble body 39 with the thimble sliding sleeve 41, the locking lifting block 36 will be pressed down through the linkage of the hinged connecting rod 42 (during this process, the thimble sliding sleeve 41 will continue to slide on the thimble body 39 for a distance).

[0077] When the locking tooth 50 and the locking rack 35 are combined with each other, it means that the thimble return spring 40 has reached a certain compression amount. At this time, the blocking of the locking lifting block 36 is lost, and the trapezoidal sliding cavity 43 will slide to the top of the locking lifting block 36 under the elastic force of the supporting locking spring 46. Since the trapezoidal sliding groove 48 is inclined, the trapezoidal sliding cavity 43 can completely press down the thimble body 39 during this process, thereby completing the locking between the locking rack 35 and the locking tooth 50.

[0078] After the position of the self-positioning thimble mechanism 2 is fixed, the heat treatment moving part 55 continues to move, and at this time the inclined sliding block 44 will retract into the trapezoidal sliding cavity 43 against the elastic force of the retraction avoidance spring 45, thereby allowing the triggering inclined push rod 47 to pass.

[0079] When the heat treatment mechanism 5 passes from the side of the automatic lifting roller mechanism 1, the upper pressing wheel part 57 will limit the position of the screw shaft body 54 from the top, and during the movement of the heat treatment moving part 55, the magnetic strip 19 will first approach the magnetic lock pin 22, and the magnetic repulsion force of the magnetic strip 19 on the magnetic lock pin 22 will make the magnetic lock pin 22 retract into the inside of the lock pin sleeve 21 against the elastic force of the lock pin return spring 61, and after the magnetic lock pin 22 slides out of the locking hole 29, the locking of the sink gear 16 will be released.

[0080] Then the sink drive rack 17 and the sink gear 16 engage and drive the sink gear 16 to rotate, and the sink control piston 15 slides in the hydraulic cavity 13 with the sink drive rack 17, and when the sink control piston 15 slides, the transmission liquid in the hydraulic push rod 23 enters the hydraulic cavity 13 and makes the lower support roller 12 lower to leave space for the heat treatment coil 56 and the water jacket 58 to pass through;

[0081] After the sink gear 16 and the sink drive rack 17 are separated, the sink control piston 15 will slowly reset under the elastic force of the piston return spring 60, and during this process, the liquid in the lower support roller 12 will flow back into the hydraulic push rod 23 and make the hydraulic push rod 23 extend and reset;

[0082] After the hydraulic push rod 23 resets, the magnetic strip 19 will leave the magnetic lock pin 22, and at this time the magnetic lock pin 22 will again extend under the elastic force of the lock pin return spring 61 and insert into the locking hole 29 to again lock and fix the sink gear 16, and because the associated control valve 25 is closed, the sink control piston 15 cannot slide and the hydraulic push rod 23 cannot extend and contract when the sink gear 16 is locked.

[0083] During the movement of the heat treatment mechanism 5, the lower support roller 12 and the upper pressing wheel part 57 can rigidly limit the position of the screw shaft body 54, the heat treatment coil 56 can inductively heat the screw shaft body 54, and the water jacket 58 can spray quenching liquid towards the screw shaft body 54 to quench the specific position of the screw shaft body 54;

[0084] The length of the sink drive rack 17 is less than the length of the magnetic strip 19, and the sink drive rack 17 is located at the middle position of the magnetic strip 19, so during the reciprocating movement of the heat treatment moving part 55, the sink gear 16 is first unlocked, then the sink gear 16 is driven to rotate by the sink drive rack 17, and after the driving is stopped, sufficient reset time is left for the sink control piston 15 and the sink gear 16, and finally the magnetic lock pin 22 is reset and the sink gear 16 is locked again by the magnetic strip 19 leaving.

[0085] After the processing is completed, the final heat treatment moving part 55 is reset, and when the heat treatment moving part 55 passes through the self-positioning needle mechanism 2 in the locked state, the heat treatment moving part 55 first pushes the inclined sliding block 44 and the trapezoidal sliding cavity 43 to overcome the elastic force of the supporting locking spring 46 to slide, and after the trapezoidal sliding cavity 43 slides, the locking lifting block 36 is reset under the elastic force of the locking block reset spring 37 and is separated from the locking rack 35 and the locking tooth 50;

[0086] The unlocked self-positioning needle mechanism 2 first slides with the heat treatment moving part 55, and when it slides to the hard limiting position of the self-positioning needle mechanism 2, the continuous sliding of the heat treatment moving part 55 pushes the trapezoidal sliding cavity 43 to slide by triggering the inclined push rod 47, and the trapezoidal sliding cavity 43 is retracted towards the trapezoidal sliding groove 48 in the process of overcoming the elastic force of the supporting locking spring 46 to slide, until the inclined push rod 47 and the inclined sliding block 44 are separated, and then the heat treatment moving part 55 passes through the self-positioning needle mechanism 2 to complete the final reset.

[0087] It should be noted that the relational terms herein such as first and second are used only to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any such actual relationship or order between such entities or operations. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements recited, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0088] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution can be designed, which should belong to the protection scope of the present application.

Claims

1. A shaft end tempering device for a lead screw, comprising a fixed base plate (3), a lead screw clamping and rotating assembly (4) and a heat treatment mechanism (5), the lead screw clamping and rotating assembly (4) is arranged on the fixed base plate (3), and the heat treatment mechanism (5) is slidingly arranged on the fixed base plate (3); characterized in that: It also includes automatic lifting roller mechanism (1) and self-positioning needle mechanism (2), the automatic lifting roller mechanism (1) array is established on the fixed bottom plate (3), the self-positioning needle mechanism (2) is slidably arranged on the fixed bottom plate (3); The automatic lifting roller mechanism (1) includes a lower roller lifting assembly (6), a settlement control assembly (7), an automatic unlocking assembly (8) and a hydraulic control assembly (9), the lower roller lifting assembly (6) is arranged on the fixed bottom plate (3), the settlement control assembly (7) is arranged on the lower roller lifting assembly (6), the automatic unlocking assembly (8) is arranged on the settlement control assembly (7), and the hydraulic control assembly (9) is arranged on the lower roller lifting assembly (6); The self-positioning needle mechanism (2) includes a sliding locking assembly (30), a needle assembly (31) and an automatic locking assembly (32), the sliding locking assembly (30) is slidably arranged on the fixed bottom plate (3), the needle assembly (31) is arranged on the sliding locking assembly (30), and the automatic locking assembly (32) is arranged on the sliding locking assembly (30); The lower roller lifting assembly (6) includes a fixed mounting plate (10), a lifting slide rod (11) and a lower supporting roller (12), the fixed mounting plate (10) is fixedly connected to the fixed bottom plate (3), the fixed mounting plate (10) is symmetrically provided with lifting slide sleeves (28), the lifting slide rod (11) is slidably arranged in the lifting slide sleeves (28), and the lower supporting roller (12) is fixedly connected to the top end of the lifting slide rod (11); The settlement control assembly (7) includes a hydraulic cavity (13), a settlement screw rod shaft (14), a settlement control piston (15), a settlement gear (16), a settlement drive rack (17) and a piston return spring (60), the hydraulic cavity (13) is arranged on the fixed mounting plate (10), the settlement screw rod shaft (14) is rotatably arranged in the hydraulic cavity (13), the settlement control piston (15) is slidably arranged in the hydraulic cavity (13), the settlement control piston (15) and the settlement screw rod shaft (14) are in threaded transmission, the piston return spring (60) is arranged between one end of the hydraulic cavity (13) and the settlement control piston (15), the settlement gear (16) is fixedly connected to one end of the settlement screw rod shaft (14), the settlement gear (16) is annularly and uniformly provided with locking holes (29), the settlement drive rack (17) is arranged on the automatic unlocking assembly (8), and the settlement drive rack (17) and the settlement gear (16) are in meshing transmission. The automatic unlocking assembly (8) comprises a sliding unlocking bracket (18), a magnetic strip (19), a locking pin mounting plate (20), a locking pin sleeve (21), a locking pin return spring (61) and a magnetic locking pin (22), the sliding unlocking bracket (18) is arranged on the heat treatment mechanism (5), the settlement driving rack (17) is fixedly connected to the sliding unlocking bracket (18), the magnetic strip (19) is fixedly connected to the sliding unlocking bracket (18), the locking pin mounting plate (20) is fixedly connected to the hydraulic cavity (13), the locking pin sleeve (21) is arranged on the locking pin mounting plate (20), the magnetic locking pin (22) is slidingly arranged in the locking pin sleeve (21), the magnetic strip (19) can apply a repulsive force to the magnetic locking pin (22) when being close to the magnetic locking pin (22), and the magnetic locking pin (22) has sliding resistance in the locking pin sleeve (21).

2. A quill end tempering device for a lead screw as defined in claim 1, wherein: The hydraulic control assembly (9) comprises a hydraulic push rod (23), a hydraulic pipeline (24), a control valve (25), a sliding valve core (26) and a control screw (27), the hydraulic push rod (23) is arranged on the fixed mounting plate (10), the telescopic end of the hydraulic push rod (23) is arranged at the bottom of the lower supporting roller (12), the control valve (25) is fixedly connected to the fixed mounting plate (10), the hydraulic push rod (23), the hydraulic cavity (13) and the control valve (25) are connected through the hydraulic pipeline (24), the sliding valve core (26) is slidingly arranged in the control valve (25), and the control screw (27) is rotatably arranged in the control valve (25). The control screw (27) and the sliding valve core (26) are in threaded transmission.

3. A quill end tempering device for a lead screw as defined in claim 2 wherein: The sliding locking assembly (30) comprises a sliding guide assembly (33), a sliding seat (34), a locking rack (35), a locking lifting block (36) and a locking block return spring (37), the sliding guide assembly (33) is arranged on the fixed bottom plate (3), the sliding seat (34) is arranged on the sliding guide assembly (33), the sliding seat (34) is provided with a horizontal inclined trapezoidal sliding groove (48) and a vertical vertical sliding groove (49), the locking rack (35) is fixedly connected to the fixed bottom plate (3), the locking lifting block (36) is slidingly arranged in the vertical sliding groove (49), the locking block return spring (37) is arranged between the bottom of the vertical sliding groove (49) and the locking lifting block (36), and the bottom of the locking lifting block (36) is provided with a locking tooth portion (50) matched with the locking rack (35).

4. A quill end tempering device for a lead screw as defined in claim 3 wherein: The ejector needle assembly (31) comprises an ejector needle support (38), an ejector needle body (39), an ejector needle reset spring (40), an ejector needle sliding sleeve (41) and a hinged connecting rod (42), the fixed base plate (3) is fixed on the sliding seat (34), the ejector needle body (39) is clamped and slidably arranged in the ejector needle support (38), the ejector needle body (39) is provided with an ejector needle sleeve ring (51), the ejector needle reset spring (40) is arranged between the ejector needle sleeve ring (51) and the ejector needle support (38), the ejector needle sliding sleeve (41) is clamped and slidably arranged on the ejector needle body (39), and the two ends of the hinged connecting rod (42) are hinged with the ejector needle sliding sleeve (41) and the locking lifting block (36) respectively.

5. A quill end tempering device for a lead screw as defined in claim 4, wherein: The automatic locking assembly (32) comprises a trapezoidal sliding cavity (43), an inclined sliding block (44), an inward retraction avoidance spring (45), a top support locking spring (46) and a trigger inclined push rod (47), the trapezoidal sliding cavity (43) is clamped and slidably arranged in the trapezoidal sliding groove (48), the top support locking spring (46) is arranged between the side wall of the trapezoidal sliding groove (48) and the trapezoidal sliding cavity (43), the inclined sliding block (44) is clamped and slidably arranged in the trapezoidal sliding cavity (43), the inward retraction avoidance spring (45) is arranged between the trapezoidal sliding cavity (43) and the inclined sliding block (44), the trigger inclined push rod (47) is fixed on the heat treatment mechanism (5), and the trigger inclined push rod (47) and the inclined sliding block (44) are in contact and cooperation.

6. A quill end tempering device for a lead screw as defined in claim 5 wherein: The screw rod clamping and rotating assembly (4) comprises a rotating control mechanism (53), a three-jaw chuck (52) and a screw rod shaft body (54), the rotating control mechanism (53) is arranged on the fixed base plate (3), the three-jaw chuck (52) is rotatably arranged on the rotating control mechanism (53), and the screw rod shaft body (54) is clamped in the three-jaw chuck (52).

7. A quill end tempering device for a lead screw as defined in claim 6 wherein: The heat treatment mechanism (5) comprises a heat treatment moving part (55), a heat treatment coil (56), an upper pressing wheel part (57) and a water jacket (58), the heat treatment moving part (55) is slidably arranged on the fixed base plate (3), the sliding unlocking support (18) and the trigger inclined push rod (47) are fixed on the heat treatment moving part (55), the heat treatment coil (56) is arranged on the heat treatment moving part (55), the heat treatment coil (56) and the screw rod shaft body (54) are coaxially arranged, the upper pressing wheel part (57) is arranged on the heat treatment moving part (55), the upper pressing wheel part (57) is located directly above the screw rod shaft body (54), the upper pressing wheel part (57) is provided with a ball type pressing wheel (59), the ball type pressing wheel (59) and the screw rod shaft body (54) are in rolling contact, and the water jacket (58) is arranged on the heat treatment moving part (55).

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