Hoisting tool for heat treatment of parts

Abstract

The utility model relates to the technical field of heat treatment hoisting, and discloses a hoisting tool for heat treatment of parts, which comprises an annular hanging scaffold and a hoisting part arranged in the annular hanging scaffold, the hoisting part comprises a hoisting rod concentrically fixed in the annular hoisting disc, an assembling cavity which is concavely arranged at the bottom of the hoisting rod and is used for inserting a hoisting lug on a part, and a transverse pin which can be inserted with the hoisting rod and the hoisting lug and limits the part on the hoisting rod or is separated from the hoisting rod to remove limitation; according to the hoisting tool, when the hoisting tool is used for hoisting parts, the number of travelling cranes or hoists does not need to be increased, and the assembly difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat treatment hoisting technical field especially relates to a hoisting tool for part heat treatment. BACKGROUND

[0002] Heavy shaft parts are often implemented by well type heat treatment furnace in the process of heat treatment such as quenching, gas nitriding etc., which has the advantages of small floor area, small deformation of parts vertical loading and unloading etc.

[0003] The patent with the application number 202111133643.X discloses a heat treatment well type furnace single part built-in quenching tool and assembly method, wherein the quenching tool comprises a lifting rod, a lifting seat, a supporting rib and a pair of lifting claws, the lifting seat is disc-shaped and is fixedly connected with the lifting rod sleeved at the center by the supporting rib thereon, the bottom of the lifting rod is provided with a pair of lifting claws, concentric cross pin holes are arranged on the lifting claws respectively, cross pins are inserted into the concentric cross pin holes, the position between the two lifting claws on the cross pin is used for lapping the inner side of the top corner of the lifting ring, and the lifting ring is welded on the shaft part.

[0004] The device of the above-mentioned scheme needs to first stand the part upright in the pit to make the lifting ring upward, the lifting ring and the upper end of the part are exposed from the pit, then the crane or hoist is used to lift the lifting seat, the lifting ring is inserted between the two lifting claws and is opposite to the concentric cross pin holes, finally the cross pin is inserted to make it inserted with the two concentric cross pin holes and the lifting ring at the same time, the lifting ring is lapped on the cross pin between the two lifting claws to make the part limited on the lifting seat, after the part is hoisted on the lifting seat, the crane or hoist shifts the lifting seat to the bearing ring in the well type furnace to wait for heat treatment.

[0005] However, since the weight of the part to be processed is large, a heavy cross pin with strong bearing capacity needs to be equipped to ensure the stable hoisting of the part, and the size and weight of the heavy cross pin are large, under the premise that the crane or hoist has lifted the lifting seat, an additional crane or hoist is needed to assist in lifting and inserting, which will lead to the increase of the number of cranes or hoists used in the above-mentioned hoisting process and the increase of cost; in addition, the alignment and insertion of the heavy cross pin and the concentric cross pin hole after lifting the heavy cross pin will lead to the difficulty of operation and the large labor intensity of the operator. UTILITY MODEL CONTENTS

[0006] The utility model provides a hoisting tool for part heat treatment which does not need to increase the number of cranes or hoists and reduces the assembly difficulty in view of the defects that the lifting seat and the cross pin need to be lifted at the same time and the assembly operation is completed in the lifting process, which leads to the increase of the number of cranes or hoists and the large assembly difficulty.

[0007] In order to solve the above-mentioned technical problem, the utility model solves the problem through the following technical scheme:

[0008] The hanging tool for heat treatment of parts comprises a ring-shaped hanging disc and a hanging part arranged in the ring-shaped hanging disc, the hanging part comprises a hanging rod concentrically fixed in the ring-shaped hanging disc, an assembly cavity recessed at the bottom of the hanging rod for inserting a hanging lug on the part, and a cross pin capable of being inserted with the hanging rod and the hanging lug and capable of limiting the part on the hanging rod or being separated from the two to release the limitation, and a guide assembly is arranged between the ring-shaped hanging disc and the hanging rod and capable of placing the cross pin and guiding the cross pin to move along the inserting and pulling direction of the cross pin.

[0009] By using the above scheme, the part with the welded hanging lug is erected in the pit, the hanging lug is above the ground, the cross pin is first lifted by the travelling crane or the lifting machine and placed in the guide assembly, then the ring-shaped hanging disc with the placed cross pin is lifted by the same travelling crane or lifting machine to make the hanging lug inserted into the assembly cavity of the hanging rod, at this time, the cross pin is only needed to be moved to guide the cross pin to move along the inserting direction of the cross pin to be simultaneously inserted with the hanging rod and the hanging lug, the part is limited on the hanging rod to complete the hanging of the part. Finally, the hanging tool with the hung part is lifted by the travelling crane or the lifting machine to the bearing ring in the pit furnace to wait for heat treatment. The cross pin and the ring-shaped hanging disc are lifted by the same travelling crane or lifting machine in sequence, so the number of travelling cranes or lifting machines does not need to be increased; at the same time, since the cross pin is placed in the guide assembly and can be guided to move along the inserting and pulling direction of the cross pin under the action of the guide assembly to be inserted, the cross pin and the hanging rod do not need to be aligned and inserted under the condition of being simultaneously lifted, the alignment and insertion difficulty of the cross pin is reduced, so the assembly difficulty is reduced.

[0010] Preferably, the guide assembly comprises guide rails arranged along the inserting and pulling direction of the cross pin and fixedly connected with the ring-shaped hanging disc and the hanging rod at two ends respectively, and blocking plates vertically upward arranged at two sides of the guide rails and used for preventing the cross pin from being separated from the guide rails.

[0011] By using the above scheme, since the ring-shaped hanging disc is a through annular body and the hanging rod is concentrically fixed in the center of the ring-shaped hanging disc, there is no position on the ring-shaped hanging disc for placing the cross pin. The guide rails are arranged along the inserting and pulling direction of the cross pin and fixedly connected with the ring-shaped hanging disc and the hanging rod at two ends respectively for placing the cross pin; the blocking plates are arranged at two sides of the guide rails for preventing the cross pin from being separated from the guide rails and cooperating with the guide rails to limit the cross pin to be guided to move in the preset direction only.

[0012] Preferably, the guide rails are provided with roller assemblies for facilitating the movement of the cross pin along the inserting and pulling direction of the cross pin.

[0013] By using the above scheme, the weight of the cross pin is large, the force required to move the cross pin is large, the roller assemblies are arranged to convert the sliding friction into rolling friction, so the movement of the cross pin is more convenient.

[0014] Preferably, the roller assemblies are detachably arranged on the guide rails, the roller assemblies comprise a roller shaft and a rolling wheel concentrically fixed on the roller shaft, the guide rails are recessed with mounting grooves for clamping or separating the two ends of the roller shaft and avoiding grooves for arranging and rotating the rolling wheel.

[0015] According to the above scheme, the roller assembly is assembled to the guide rail before the cross pin is placed on the guide rail by hoisting, that is, the two ends of the roller are clamped into the installation slot and are in rotational cooperation with the installation slot, at this time the rolling wheel is installed into the avoiding slot, and the upper end point of the rolling wheel is located above the upper surface of the guide rail, so as to ensure that the outer surface of the rolling wheel is in contact with the cross pin. After the cross pin is inserted, the roller assembly is removed. The detachable setting of the roller assembly makes it unnecessary to be subjected to heat treatment together with the hoisting tool, that is, the roller assembly can still be repeatedly used for multiple times during the whole heat treatment process of the part, thereby increasing the utilization rate.

[0016] Preferably, the hanger is fixed concentrically in the annular hanger disc through connecting ribs, and the two ends of the connecting rib are fixedly connected with the annular hanger disc and the hanger respectively and are uniformly and spacedly arranged around the hanger.

[0017] According to the above scheme, the annular hanger disc is placed on the bearing ring during heat treatment, and the two ends of the connecting rib are fixedly connected with the annular hanger disc and the hanger respectively, so as to ensure that the hanger is fixed on the annular hanger disc; a plurality of connecting ribs are arranged to ensure the bearing capacity of the hanger; and the connecting ribs are uniformly and spacedly arranged around the hanger to ensure the force balance of the hanger.

[0018] Preferably, the connecting rib is arranged in a wave shape along the radial direction of the hanger.

[0019] According to the above scheme, the stress generated during the heat treatment process is reduced.

[0020] Preferably, the thickness of the connecting rib gradually decreases from the side close to the hanger to the side away from the hanger along the axial direction of the hanger.

[0021] According to the above scheme, since the hanger and its vicinity are the main stress area, the thickness of the connecting rib close to the hanger is greater than that close to the annular hanger disc, so as to reduce the concave deformation of the main stress area after the hoisting tool is used for multiple times, and effectively improve the overall service life of the hoisting tool.

[0022] Preferably, at least one transverse reinforcing rib is arranged between the connecting rib and the hanger along the axial direction of the annular hanger disc.

[0023] According to the above scheme, the deformation of the hoisting tool is further reduced, and the overall service life of the hoisting tool is improved.

[0024] Preferably, a through slot is symmetrically formed on the outer wall of the hanger along the insertion and extraction direction of the cross pin, and the two ends of the cross pin are detachably installed with limiting nails for limiting the cross pin from being separated from the through slot when the cross pin is inserted into the two through slots.

[0025] Using the above scheme, the lifting lug is inserted into the assembly cavity, and the cross pin moves along its insertion direction until it is engaged with both the lifting lug and the two through slots. That is, the cross pin engages with the lifting rod and the lifting lug, confining the part on the lifting rod. Limit pins are installed at both ends of the cross pin. The limit pins cannot pass through the through slots, thus reducing the possibility of the cross pin accidentally coming out and increasing the safety of the lifting tools.

[0026] Preferably, pull rings for installing pull ropes are fixed at both ends of the horizontal pin.

[0027] Using the above scheme, the pull ring is used to hang the pull rope. One end of the pull rope is attached to the pull ring, and the other end passes through the lifting lug and the two through slots. By pulling the pull rope, the horizontal pin can be moved. After the horizontal pin is inserted into the lifting lug and the two through slots, the pull rope can be removed.

[0028] This utility model, by adopting the above technical solution, has significant technical effects: the guide rail is set along the insertion and removal direction of the horizontal pin, and both ends of the guide rail are fixedly connected to the annular lifting plate and the lifting rod, respectively, for placing the horizontal pin; baffle plates are set on both sides of the guide rail to prevent the horizontal pin from falling off the guide rail; the horizontal pin and the annular lifting plate are lifted sequentially by the same crane or hoist, so there is no need to increase the number of cranes or hoists, reducing costs; at the same time, since the baffle plates cooperate with the guide rail to restrict the horizontal pin to move only in a preset direction to achieve insertion, there is no need to align and insert the horizontal pin and the lifting rod while they are being lifted at the same time, reducing the difficulty of aligning and inserting the horizontal pin, thereby reducing the assembly difficulty. Attached Figure Description

[0029] Figure 1 This embodiment shows an isometric view of a lifting tool for heat treatment of parts when the roller assembly, cross pin, and parts are not assembled. Figure 1 ;

[0030] Figure 2 yes Figure 1 Enlarged view of point A in the image;

[0031] Figure 3 This embodiment shows an isometric view of a lifting tool for heat treatment of parts when the roller assembly, cross pin, and parts are not assembled. Figure 2 ;

[0032] Figure 4 yes Figure 3 Enlarged view of point B in the image;

[0033] Figure 5 This is a top view of a lifting tool used for heat treatment of parts, during the lifting of the parts.

[0034] Figure 6 yes Figure 5 Enlarged view of point C in the image;

[0035] Figure 7 yes Figure 5is a cross-sectional view of D-D in the figure;

[0036] Figure 8 is an axonometric view of a limit pin installation for a hoisting tool for part heat treatment;

[0037] Figure 9 is an axonometric view of a roller assembly for a hoisting tool for part heat treatment.

[0038] The part names referred to by the respective numbers in the above figures are as follows: 1, annular lifting tray; 2, lifting rod; 3, assembly cavity; 4, part; 5, lifting lug; 501, insertion slot; 6, cross pin; 7, guide rail; 8, blocking plate; 9, roller shaft; 10, rolling wheel; 11, installation slot; 12, avoidance slot; 13, connecting rib; 14, transverse reinforcing rib; 15, through slot; 16, limit pin; 17, pull ring; 18, bearing; 19, limit hole; 20, clamping cap. DETAILED DESCRIPTION

[0039] The utility model will be described in further detail below in combination with the drawings and examples.

[0040] Example

[0041] A hoisting tool for part heat treatment, with reference to Figures 1 to 9 , comprising an annular lifting tray 1 and a lifting rod 2 concentrically fixed at the center of the annular lifting tray 1, and the annular lifting tray 1 and the lifting rod 2 are fixed through connecting ribs 13. The top end of the lifting rod 2 is provided with a clamping cap 20 for easy lifting, and the clamping cap 20 is prior art and will not be described here.

[0042] The two ends of the connecting rib 13 are fixedly connected with the inner wall of the annular lifting tray 1 and the outer wall of the lifting rod 2, and the connecting rib 13 is uniformly and spacedly provided with a plurality of connecting ribs 13 around the lifting rod 2, and in this embodiment, four connecting ribs 13 are provided. The connecting rib 13 is arranged in a wave shape along the radial direction of the lifting rod 2, and the thickness of the connecting rib 13 along the axial direction of the lifting rod 2 gradually decreases from the side close to the lifting rod 2 to the side away from the lifting rod 2. At least one transverse reinforcing rib 14 is spacedly arranged between each connecting rib 13 and the lifting rod 2 along the axial direction of the annular lifting tray 1, and in this embodiment, two transverse reinforcing ribs 14 are arranged between each connecting rib 13 and the lifting rod 2.

[0043] The bottom of the suspender 2 is concave to form an assembling cavity 3 for inserting the lifting lug 5 on the part 4, and further comprises a cross pin 6 which reciprocally moves along the radial direction of the suspender 2, and is used for plugging with the suspender 2 and the lifting lug 5 to limit the part 4 on the suspender 2, or is used for unplugging with the two to release the limitation on the part 4. The outer wall of the suspender 2 is symmetrically provided with two through grooves 15 along the plugging direction of the cross pin 6 for the cross pin 6 to pass through, and the lifting lug 5 is provided with a plug groove 501 for the cross pin 6 to pass through, and the cross pin 6 is plugged with the plug groove 501 on the lifting lug 5 and the two through grooves 15 at the same time, that is, the cross pin 6 is plugged with the suspender 2 and the lifting lug 5 at the same time. In the embodiment, the cross pin 6 and the through groove 15 are arranged in a rectangular shape, which reduces the rotation of the cross pin 6 and increases the stability of the cross pin 6.

[0044] A guide assembly is arranged between the annular lifting disc 1 and the suspender 2, and can place and guide the movement of the cross pin 6 along the plugging direction of the cross pin 6. The guide assembly comprises a guide rail 7 arranged along the plugging direction of the cross pin 6, both ends of the guide rail 7 are fixedly connected with the inner wall of the annular lifting disc 1 and the outer wall of the suspender 2 respectively, and vertical upward blocking plates 8 are arranged on both sides of the guide rail 7 for preventing the cross pin 6 from being separated from the guide rail 7, the height of the blocking plates 8 along the axial direction of the suspender 2 is greater than or equal to half of the cross pin 6 to ensure that the blocking plates 8 can prevent the cross pin 6 from being separated from the guide rail 7.

[0045] A roller assembly facilitating the movement of the cross pin 6 is detachably arranged on the guide rail 7 along the plugging direction of the cross pin 6, the roller assembly is detachably arranged on the guide rail 7, and the roller assembly comprises a roller shaft 9 and a rolling wheel 10 concentrically fixed on the roller shaft 9, bearings 18 are concentrically arranged on both ends of the roller shaft 9, and installation grooves 11 are concave on the guide rail 7 for clamping or separating the bearings 18 on both ends of the roller shaft 9, and the rolling wheel 10 is arranged in four along the axial direction of the roller shaft 9, and an avoiding groove 12 is concave on the upper end surface of the guide rail 7 for accommodating and rotating all the rolling wheels 10.

[0046] Limiting rings 17 for installing the pull rope are fixedly arranged on both ends of the cross pin 6, limiting holes 19 are concave on the side wall of the cross pin 6 close to both ends, and limiting nails 16 are detachably connected in the limiting holes 19, when the limiting nails 16 are arranged in the limiting holes 19, one end of the limiting nails 16 is exposed outside the limiting holes 19 for limiting the cross pin 6 from being separated from the through groove 15, and when the cross pin 6 needs to be separated from the through groove 15, the limiting nails 16 are removed to release the limitation. The detachable connection between the limiting hole 19 and the limiting nail 16 can be thread connection or interference plugging and other prior art, which will not be described in detail here.

[0047] The specific steps of hoisting the part are as follows:

[0048] The part 4 is vertically placed in the pit and the lug 5 is installed on the upper end face, the ring-shaped lifting disc 1 is placed horizontally, the bearings 18 at both ends of the roller shaft 9 are respectively clamped into the installation grooves 11, the roller shaft 9 is rotationally matched with the installation grooves 11, the rolling wheel 10 is installed into the avoiding grooves 12, the rolling wheel assembly can be detachably installed on the guide rail 7, one end of the pull rope is hung on the pull ring 17, and the cross pin 6 is hoisted and placed on the guide rail 7 and is rolling matched with the rolling wheel 10 by using the existing auxiliary tools such as a magnetic suction disc and a crane or a lifting machine.

[0049] The whole hoisting tool is hoisted to the lug 5 inserted into the assembly cavity 3 by using the same crane or lifting machine to grab the clamp cap 20, so that the insertion slot 501 on the lug 5 for the cross pin 6 to pass through is opposite to the two through grooves 15. The limiting pin 16 is installed in the limiting hole 19 away from the one end of the pull rope, the one end of the pull rope away from the pull ring 17 is passed through the two through grooves 15 and the insertion slot 501 on the lug 5 by using the auxiliary tools such as a hook, the pull rope is pulled to pull the cross pin 6, the one end of the cross pin 6 close to the pull rope is sequentially passed through the through groove 15 close to the guide rail 7, the insertion slot 501 on the lug 5 and the through groove 15 away from the guide rail 7, the cross pin 6 is inserted into the lug 5 and the suspension rod 2 at the same time, and the part 4 is hoisted on the suspension rod 2. The limiting pin 16 away from the pull rope prevents the cross pin 6 from being excessively pulled out.

[0050] After the cross pin 6 is assembled with the lug 5, the limiting pin 16 is installed on the limiting hole 19 close to the one end of the pull rope of the cross pin 6, the pull rope is taken off, and the rolling wheel assembly is taken away. The hoisting tool is hoisted together with the part 4 by the crane or the lifting machine and is transported into a heat treatment furnace. In actual operation, the rolling wheel assembly closest to the suspension rod 2 can be retained on the guide rail 7, so that the cross pin 6 is conveniently disassembled subsequently.

[0051] After the heat treatment is completed, the hoisting tool is hoisted together with the part 4 by the crane or the lifting machine to make the part 4 stand in the pit, the rolling wheel assembly is installed on the guide rail 7, the pull rope is hung on the pull ring 17 close to the guide rail 7 of the cross pin 6, the limiting pin 16 is taken off, the cross pin 6 is confirmed to be loose, the pull rope is pulled and is simultaneously matched with the existing devices such as a mechanical jack to drive the cross pin 6 to move away from the suspension rod 2 and the lug 5, and the disassembly of the part 4 is completed.

[0052] Finally, the hoisting tool is hoisted away from the part 4 and is reset, the pull rope is taken off, the cross pin 6 is hoisted away, and the rolling wheel assembly is taken away.

[0053] The above only describes preferred embodiments of the present application, the protection scope of the present application is not limited to the above-described embodiments, and any technical solution falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the present application are also regarded as the protection scope of the present application.

Claims

1. A lifting tool for heat treatment of parts, comprising a ring-shaped lifting tray (1) and a lifting portion arranged in the ring-shaped lifting tray (1), characterized in that: The lifting part comprises a lifting rod (2) concentrically fixed in the annular lifting disc (1), an assembly cavity (3) recessed at the bottom of the lifting rod (2) for inserting the lifting lug (5) on the part (4), and a cross pin (6) which can be inserted with the lifting rod (2) and the lifting lug (5) and can limit the part (4) on the lifting rod (2) or be separated from the two to release the limitation. A guide assembly is arranged between the annular lifting disc (1) and the lifting rod (2) and can place the cross pin (6) and guide the movement of the cross pin (6) along the insertion and extraction direction.

2. A hoisting tool for heat treating a part according to claim 1, characterized in that: The guide assembly comprises guide rails (7) arranged along the insertion and extraction direction of the cross pin (6) and fixedly connected with the annular lifting disc (1) and the lifting rod (2) at both ends, and blocking plates (8) vertically upward arranged on both sides of the guide rail (7) to prevent the cross pin (6) from being separated from the guide rail (7).

3. A lifting tool for heat treating a part according to claim 2, characterized in that: The guide rail (7) is provided with a roller assembly for facilitating the movement of the cross pin (6) along the insertion and extraction direction of the cross pin (6).

4. A lifting tool for heat treating a part according to claim 3, characterized in that: The roller assembly is detachably arranged on the guide rail (7) and comprises a roller shaft (9) and a rolling wheel (10) concentrically fixed on the roller shaft (9). The guide rail (7) is recessed with an installation slot (11) for clamping or separating the two ends of the roller shaft (9) and an avoidance slot (12) for loading and rotating the rolling wheel (10).

5. A hoisting tool for heat treating a part as defined in claim 1, wherein: The lifting rod (2) is concentrically fixed in the annular lifting disc (1) through a connecting rib (13). The two ends of the connecting rib (13) are fixedly connected with the annular lifting disc (1) and the lifting rod (2), respectively, and a plurality of connecting ribs (13) are uniformly and spaced apart around the lifting rod (2).

6. A lifting tool for heat treating a part according to claim 5, characterized in that: The connecting rib (13) is arranged in a wave shape along the radial direction of the lifting rod (2).

7. A hoisting tool for heat treating a part as defined in claim 5, wherein: The thickness of the connecting rib (13) along the axial direction of the lifting rod (2) gradually decreases from the side close to the lifting rod (2) to the side away from the lifting rod (2).

8. A hoisting tool for heat treating a part according to claim 5, characterized in that: At least one transverse reinforcing rib (14) is arranged between the connecting rib (13) and the lifting rod (2) along the axial direction of the annular lifting disc (1).

9. A hoisting tool for heat treating a part according to claim 1, characterized in that: Symmetrical through grooves (15) are provided on the outer wall of the lifting rod (2) along the insertion and extraction direction of the cross pin (6) for the cross pin (6) to pass through. When the cross pin (6) and the two through grooves (15) are inserted, the two ends of the cross pin (6) can be detachably installed with a limiting pin (16) to limit the cross pin (6) from being separated from the through groove (15).

10. A hoisting tool for heat treating a part according to claim 1, characterized in that: The two ends of the cross pin (6) are fixedly provided with a pull ring (17) for installing a pull rope.

Images