Auxiliary device for discharging resistance furnace

Abstract

The utility model discloses a discharging auxiliary device of resistance furnace relates to the field of discharging auxiliary device, including movable trapezoidal frame, the hinged operating arm of car frame upper end, operating arm divides resistance arm and power arm and power arm is longer, and resistance arm end hinged inside bracing type lifting appliance, and the left and right handle are established to power arm end, the locking mechanism is established to car frame upper end, and the first hand brake handle of left handle passes through the cable linkage locking mechanism, resistance arm is equipped with the opening and closing mechanism, and the second hand brake handle of right handle passes through the steel wire rope linkage opening and closing mechanism control lifting appliance expansion and contraction diameter. The device reduces 20-30 jin workpiece gripping force through the lever principle, and cooperates heat -proof layer and prevents burn, solves manual material taking fatigue, workpiece falling and personnel burn problem, and adapts resistance furnace small batch sample scene.

Description

Technical Field

[0001] This utility model relates to the field of feeding auxiliary devices, and in particular to a feeding auxiliary device for a resistance furnace. Background Technology

[0002] When ring bearings undergo heat treatment in an electric resistance furnace, they need to be heated to above the Ac3 critical temperature (800-1000℃) to form uniform austenite, ensuring their hardness and wear resistance. If the cooling is too slow after heat treatment, natural cooling can easily lead to the formation of pearlite, resulting in insufficient hardness. Therefore, they need to be quickly removed before the temperature drops to 400℃ and immediately immersed in a cooling medium, such as quenching oil or water, for forced cooling to promote martensitic transformation and ensure the final performance.

[0003] Currently, for small-batch, prototyping production scenarios, the mainstream method for feeding electric resistance furnaces is still manual assisted material handling and transfer. Although this method has the advantages of low equipment cost and compatibility with multiple bearing specifications, it has the following problems in practical applications: Firstly, manual material handling relies on operators using heat-resistant steel clamps to directly reach into the furnace to grab the bearings. Operators need to get close to the furnace door, at which point the high temperature inside the furnace directly affects the skin of the face and arms, which can easily cause chronic burns.

[0004] Secondly, if the bearing is heavy, such as 20-30 kilograms, the arm is prone to fatigue when manually grasping it, and there is a risk of the clamp slipping out of the hand or the hot workpiece falling. This may not only damage the equipment, but also cause burns due to rolling. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide an auxiliary device for feeding electric resistance furnaces, which solves the problem that when manually handling materials in small-batch and prototyping scenarios, the workpiece is easily dropped due to arm fatigue when the operator grabs the bearing.

[0006] The technical solution of this utility model is as follows: A charging auxiliary device for a resistance furnace includes a movable trapezoidal frame, with an operating arm hinged to the upper end of the trapezoidal frame. The operating arm extends along the length of the trapezoidal frame, and the length of the operating arm is greater than the length of the trapezoidal frame. The operating arm is divided into a resistance arm and a power arm by the hinge point. The length of the power arm is greater than the length of the resistance arm. The end of the resistance arm away from the power arm is vertically hinged with an internal support type lifting device. The end of the power arm away from the resistance arm is respectively provided with a left handle and a right handle. The upper end of the trapezoidal frame is equipped with a locking mechanism that allows the locking operating arm to rotate relative to the trapezoidal frame. The left handle is equipped with a first handbrake handle. The locking mechanism and the first handbrake handle are linked by a cable. The end of the resistance arm is provided with an opening and closing mechanism for controlling the expansion or contraction of the inner support type lifting device, and a second hand brake is provided on the right handle. The opening and closing mechanism and the second hand brake are linked by a wire rope.

[0007] Furthermore, the trapezoidal frame includes two parallel left trapezoidal frames and a right trapezoidal frame, which are fixedly connected by multiple horizontal connecting rods. The upper end faces of the two trapezoidal frames are provided with left and right bearing sleeves along their length directions. A hinge shaft is fixedly provided on the operating arm, and the axis of the hinge shaft is perpendicular to the axis of the resistance arm and the power arm. The two ends of the hinge shaft are rotatably engaged with the left and right bearing sleeves, respectively. The locking mechanism is provided on the outer side of the left bearing sleeve.

[0008] Furthermore, the locking mechanism includes a base located on the side of the left bearing sleeve away from the operating arm and spaced apart from the left bearing sleeve; a C-shaped clamp is hinged to the base, with the opening of the clamp facing the hinge axis; two compressed springs are spaced apart on the end face of the clamp away from the hinge, with one end of the spring abutting against the end face of the clamp away from the hinge and the other end abutting against the upper end face of the base; one end of the cable is connected to the middle of the two springs on the end face of the clamp away from the hinge, and the other end of the cable passes through the base and the left trapezoidal frame in sequence, and is connected to the first handbrake handle.

[0009] Furthermore, the internal support type lifting device includes a vertically arranged connecting pipe, the upper end of which is hinged to the operating arm; three arc-shaped support claws are evenly distributed circumferentially on the outer periphery of the connecting pipe; a sliding sleeve, a first fixed sleeve, and a second fixed sleeve are sequentially fitted on the annular wall of the connecting pipe from top to bottom, the first fixed sleeve and the second fixed sleeve are fixedly connected to the connecting pipe, and the sliding sleeve is slidably engaged with the connecting pipe; each support claw is connected to the sliding sleeve, the first fixed sleeve, and the second fixed sleeve respectively through a hinge rod; The opening and closing mechanism is provided on the upper end face of the sliding sleeve.

[0010] Furthermore, the opening and closing mechanism includes a guide wheel; the connecting pipe is located on one side wall of the resistance arm, the resistance arm has an installation groove, the guide wheel is installed in the installation groove, and the guide wheel is coaxially and rotatably arranged with the internal support type lifting device; a lifting lug is fixed on the upper end face of the sliding sleeve, the second handbrake handle includes a fixed seat connected to the right handle, a brake rod is rotatably installed on the fixed seat, and a connecting ring is provided at the free end of the brake rod away from the fixed seat; the lifting lug, the guide wheel and the connecting ring are connected by the wire rope.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model, through a lever design where the length of the power arm is greater than that of the resistance arm (length ratio 2:1 to 3:1), can effectively reduce the gripping force of the 20-30 catties high-temperature annular bearing, thus reducing operator arm fatigue. At the same time, the left and right handle grip sections are covered with double-layer heat insulation, which can reduce the conduction of high temperature from the furnace opening to the hands, and reduce the impact on the operator's face and arms due to proximity to the furnace door. This helps to alleviate the safety hazards and physical exhaustion problems existing in traditional manual material handling.

[0012] 2. This utility model adopts an independent linkage design with the left handle controlling the locking mechanism and the right handle controlling the opening and closing mechanism. The two hands have clear division of labor. When adjusting the position of the frame and the height of the operating arm, the operator can use the locking mechanism on the left handle. When controlling the opening and closing of the lifting device, only the right handle needs to be operated, without having to repeatedly switch operating parts, thus reducing the frequency of switching operation steps. At the same time, the height of the internal support lifting device is designed to be less than the opening height of the resistance furnace, which can be adapted to the opening requirements of most common resistance furnaces, ensuring that the lifting device can be smoothly extended into the furnace to align with the workpiece, thus improving the smoothness of actual operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the assembly of the locking mechanism and the opening / closing mechanism of this utility model.

[0015] Figure 3 This is a schematic diagram of the opening and closing mechanism of this utility model.

[0016] Figure 4 This utility model Figure 3 Enlarged view of point A.

[0017] Figure 5 This is a schematic diagram of the locking mechanism of this utility model (locked state).

[0018] Figure 6 This is a disassembly diagram of the locking mechanism of this utility model.

[0019] Reference numerals in the attached diagram: 1. Trapezoidal frame; 2. Operating arm; 2-1. Resistance arm; 2-2. Power arm; 2-3. Hinge shaft; 3. Left handle; 3-1. First handbrake handle; 4. Right handle; 4-1. Second handbrake handle; 4-1.1. Connecting ring; 5. Locking mechanism; 5-1. Cable; 5-1.1. Fixing column; 5-1.1.1. Fixing hole; 5-2. Base; 5-3. Clamp; 5-3.1. Second blind hole; 5-4. Spring; 5-5. Fixing bolt; 6. Opening and closing mechanism; 6-1. Wire rope; 6-2. Guide wheel; 6-3. Guide tube; 7. Internal support type lifting device; 7-1. Sliding sleeve; 7-1.1. Lifting lug; 8. Left bearing sleeve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] like Figures 1 to 6As shown, a resistance furnace unloading auxiliary device includes a movable trapezoidal frame 1. The bottom of the trapezoidal frame 1 has four spaced casters. An operating arm 2 is hinged to the upper end of the trapezoidal frame 1, extending along the length of the trapezoidal frame 1, and its length is greater than that of the trapezoidal frame 1. The operating arm 2 is made of 310S stainless steel and coated with an Al2O3-ZrO2 composite high-temperature ceramic coating, which resists steel oxidation caused by radiant heat from the furnace opening and blocks heat conduction. The operating arm 2 is divided into a resistance arm 2-1 and a power arm 2-2 at the hinge point. The power arm 2-2 is longer than the resistance arm 2-1, and the length ratio of the power arm 2-2 to the resistance arm 2-1 is 2:1 to 3:1. This leverage principle reduces the gripping force of 20-30 catties workpieces, reducing operator arm fatigue. The resistance arm 2-1 is located away from the power arm 2-1. -2 is vertically hinged to an internal support lifting device 7. The height of the internal support lifting device 7 is less than the height of the resistance furnace opening, ensuring that the internal support lifting device 7 can be smoothly extended into the furnace to lift the workpiece. The end of the power arm 2-2 away from the resistance arm 2-1 is provided with a left handle 3 and a right handle 4 respectively. The gripping sections of the left handle 3 and the right handle 4 are covered with a heat insulation layer. The heat insulation layer is a double-layer structure, with the inner layer being heat insulation cotton and the outer layer being flexible ceramic fiber cloth. The upper end of the trapezoidal frame 1 is provided with a locking mechanism 5 that locks the operating arm 2 and rotates relative to the trapezoidal frame 1. The left handle 3 is provided with a first handbrake 3-1. The locking mechanism 5 and the first handbrake 3-1 are linked through a cable 5-1. The end of the resistance arm 2-1 is provided with an opening and closing mechanism 6 that controls the expansion or contraction of the internal support lifting device 7. The right handle 4 is provided with a second handbrake 4-1. The opening and closing mechanism 6 and the second handbrake 4-1 are linked through a wire rope 6-1. Furthermore, the trapezoidal frame 1 includes two parallel trapezoidal frames, a left trapezoidal frame and a right trapezoidal frame, which are fixedly connected by multiple horizontal connecting rods. The upper end face of the two trapezoidal frames is provided with a left bearing sleeve 8 and a right bearing sleeve along their length direction. The left and right bearing sleeves are made of 310S stainless steel forgings, with zirconia ceramic bearings inlaid in the inner ring. A hinge shaft 2-3 is integrally fixed on the operating arm 2. The axis of the hinge shaft 2-3 is perpendicular to the axis of the resistance arm 2-1 and the power arm 2-2. The two ends of the hinge shaft 2-3 are rotatably engaged with the left bearing sleeve 8 and the right bearing sleeve, respectively. A locking mechanism 5 is provided on the outside of the left bearing sleeve 8.Furthermore, the locking mechanism 5 includes a base 5-2, which is made of 310S stainless steel. The base 5-2 is located on the side of the left bearing sleeve 8 away from the operating arm 2 and is spaced apart from the left bearing sleeve 8. A C-shaped clamp 5-3 is hinged to the base 5-2, with the opening of the clamp 5-3 facing the hinge shaft 2-3. The inner side of the clamp 5-3 is milled with three anti-slip grooves to increase the friction between the clamp 5-3 and the hinge shaft 2-3. Two compressed springs 5-4, which are high-temperature alloy springs, are spaced apart on the end face of the clamp 5-3 away from the hinge. One end of the spring 5-4 abuts against the end face of the clamp 5-3 away from the hinge, and the other end abuts against the upper end face of the base 5-2, ensuring that the inner ring wall of the clamp 5-3 is always away from the hinge shaft 2-3 when it is not locked; a cable fixing bracket is provided below the left trapezoidal frame, and one end of the cable 5-1 is connected to the middle of the two springs 5-4 on the end face of the clamp 5-3 away from the hinge. Cable through holes are opened on the base 5-2 and the left trapezoidal frame. The other end of the cable 5-1 passes through the cable through holes of the base 5-2 and the left trapezoidal frame in sequence and is connected to the first handbrake handle 3-1. Furthermore, the end of the cable 5-1 away from the first handbrake handle 3-1 is connected to a fixing post 5-1.1, and a fixing hole 5-1.1.1 is formed radially on the fixing post 5-1.1. The end face of the clamp 5-3 away from the hinge is provided with a first blind hole that mates with the fixing post 5-1.1. A second blind hole 5-3.1 is formed horizontally on the side wall of the clamp 5-3 away from the left bearing sleeve 8. The second blind hole 5-3.1 is arranged perpendicularly to the first blind hole and the two are connected. A fixing bolt 5-5 is screwed into the second blind hole 5-3.1. The stud size of the fixing bolt 5-5 is smaller than the diameter of the fixing hole 5-1.1.1 and its end is screwed into the fixing hole 5-1.1.1. In the assembled state, the fixing post 5-1.1 extends into the first blind hole, and the fixing bolt 5-5 extends into the second blind hole 5-3.1 and the fixing hole 5-1.1.1 in sequence, completing the rigid connection between the cable 5-1 and the clamp 5-3. Furthermore, the internal support type lifting device 7 includes a vertically arranged connecting pipe made of 310S heat-resistant stainless steel, which can withstand temperatures above 1200℃. The upper end of the connecting pipe is hinged to the operating arm 2. Three arc-shaped support claws are evenly distributed circumferentially around the outer periphery of the connecting pipe. The support claws are made of 310S heat-resistant stainless steel, and the outer sides of the support claws away from the connecting pipe are detachably provided with an anti-slip layer made of flexible ceramic fiber. A sliding sleeve 7-1, a first fixed sleeve, and a second fixed sleeve are sequentially fitted on the annular wall of the connecting pipe from top to bottom. The first fixed sleeve and the second fixed sleeve are fixedly connected to the connecting pipe, and the sliding sleeve 7-1 slides with the connecting pipe. Each support claw is connected to the sliding sleeve 7-1, the first fixed sleeve, and the second fixed sleeve respectively through a hinge rod. An opening and closing mechanism 6 is provided on the upper surface of the sliding sleeve 7-1.Furthermore, the opening and closing mechanism 6 includes a guide wheel 6-2, which is made of silicon nitride ceramic material; the connecting pipe is located on one side wall of the resistance arm 2-1, and the resistance arm 2-1 has an installation groove, in which the guide wheel 6-2 is installed. The guide wheel 6-2 is coaxially and rotatably mounted with the internal support type lifting device 7; a lifting lug 7-1.1 is fixedly mounted on the upper end face of the sliding sleeve 7-1, and the lifting lug 7-1.1 is welded and fixed to the sliding sleeve 7-1; the second handbrake handle 4-1 includes a fixed seat connected to the right handle 4, and a brake rod is rotatably mounted on the fixed seat. A connecting ring 4-1.1 is provided at the free end of the brake rod away from the fixed seat; the lifting lug 7-1.1, the guide wheel 6-2 and the connecting ring 4-1.1 are connected by a steel wire rope 6-1. Furthermore, an S-shaped guide tube 6-3 is fixed on the power arm 2-2. One end of the guide tube 6-3 is aligned with the center line of the groove of the guide wheel 6-2, and the other end is aligned with the center of the connecting ring 4-1.1. The wire rope 6-1 is threaded through the guide tube 6-3.

[0022] The working principle of this utility model: 1. After the annular bearing has been heated in the resistance furnace, open the furnace door. The operator holds the left handle 3 / right handle 4 and first squeezes the first handbrake 3-1 of the left handle 3. The cable 5-1 passes through the cable holes of the base 5-2 and the left trapezoidal frame in sequence, overcoming the elasticity of the high-temperature alloy spring 5-4 to make the clamp 5-3 rotate around the hinge point until the three anti-slip grooves on the inner side of the clamp 5-3 are tightly attached to the hinge shaft 2-3, realizing the relative locking of the operating arm 2 and the trapezoidal frame 1. Then push the movable trapezoidal frame 1 to move the device to the side of the resistance furnace opening; release the first handbrake 3-1, and adjust the height of the inner support type lifting device 7 at the end of the resistance arm 2-1 by pressing down or raising the power arm 2-2. Because the height of the lifting device is less than the height of the resistance furnace opening, it can be easily extended into the furnace and aligned with the 20-30 catties annular bearing to be taken out inside the furnace.

[0023] 2. After aligning the internal support lifting device 7 above the annular bearing, squeeze the second handbrake 4-1 of the right handle 4 to transmit tension through the wire rope 6-1. The wire rope 6-1 passes sequentially around the guide wheel 6-2 in the mounting groove of the resistance arm 2-1 and the lifting lug 7-1.1 at the upper end of the sliding sleeve 7-1, pulling the sliding sleeve 7-1 upward along the connecting pipe. As the sliding sleeve 7-1 rises, it synchronously drives the three arc-shaped support claws to reduce their diameter through the hinge rod. At this time, press down the power arm 2-2 to adjust the height of the lifting device, and place the reduced-diameter internal support lifting device 7 into the annular bearing. Then release the second handbrake 4-1—the sliding sleeve 7-1 slides down under gravity, driving the support claws to expand their diameter until the anti-slip layer on the outside of the support claws adheres to the inner wall of the annular bearing, achieving initial clamping and positioning of the workpiece.

[0024] 3. Raise the power arm 2-2 to adjust the height of the lifting device. During the process, the support claws will rise with the lifting device to further fit against the inner wall of the bearing hole, ensuring a stable clamping. Squeeze the first handbrake 3-1 of the left handle 3 again to lock the operating arm 2 and the trapezoidal frame 1 relative to each other; push the movable trapezoidal frame 1 to move the annular bearing away from the resistance furnace, and then transfer it to the quenching stage.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A charging auxiliary device for a resistance furnace, comprising a movable trapezoidal frame, characterized in that, An operating arm is hinged to the upper end of the trapezoidal frame. The operating arm extends along the length of the trapezoidal frame, and the length of the operating arm is greater than the length of the trapezoidal frame. The operating arm is divided into a resistance arm and a power arm by the hinge point. The length of the power arm is greater than the length of the resistance arm. The end of the resistance arm away from the power arm is vertically hinged with an internal support type lifting device. The end of the power arm away from the resistance arm is respectively provided with a left handle and a right handle. The upper end of the trapezoidal frame is equipped with a locking mechanism that allows the locking operating arm to rotate relative to the trapezoidal frame. The left handle is equipped with a first handbrake handle. The locking mechanism and the first handbrake handle are linked by a cable. The end of the resistance arm is provided with an opening and closing mechanism for controlling the expansion or contraction of the inner support type lifting device, and a second hand brake is provided on the right handle. The opening and closing mechanism and the second hand brake are linked by a wire rope.

2. The auxiliary device for feeding a resistance furnace according to claim 1, characterized in that, The trapezoidal frame includes two parallel trapezoidal frames, a left trapezoidal frame and a right trapezoidal frame, which are fixedly connected by multiple horizontal connecting rods. The upper end faces of the two trapezoidal frames are provided with a left bearing sleeve and a right bearing sleeve along their length. A hinge shaft is fixedly provided on the operating arm. The axis of the hinge shaft is perpendicular to the axis of the resistance arm and the power arm. The two ends of the hinge shaft are respectively rotatably engaged with the left bearing sleeve and the right bearing sleeve. The locking mechanism is provided on the outer side of the left bearing sleeve.

3. The auxiliary device for feeding a resistance furnace according to claim 2, characterized in that, The locking mechanism includes a base, which is located on the side of the left bearing sleeve away from the operating arm and is spaced apart from the left bearing sleeve. A C-shaped clamp is hinged to the base, with the opening of the clamp facing the hinge axis. Two compressed springs are spaced apart on the end face of the clamp away from the hinge. One end of the spring abuts against the end face of the clamp away from the hinge, and the other end abuts against the upper end face of the base. On the end face of the clamp away from the hinge, one end of the cable is connected to the middle of the two springs. The other end of the cable passes through the base and the left trapezoidal frame in sequence and is connected to the first handbrake handle.

4. The auxiliary device for feeding a resistance furnace according to claim 3, characterized in that, The end of the cable away from the first handbrake is connected to a fixing post, and a fixing hole is provided on the fixing post along its radial direction. A first blind hole is provided on the end face of the clamp away from the hinge to cooperate with the fixing post. A second blind hole is provided horizontally on the side wall of the clamp away from the left bearing sleeve. The second blind hole is arranged perpendicularly to the first blind hole and the two are connected. A fixing bolt is screwed into the second blind hole. The stud size of the fixing bolt is smaller than the diameter of the fixing hole and the end extends into the fixing hole.

5. The auxiliary device for feeding a resistance furnace according to claim 1, characterized in that, The internal support type lifting device includes a vertically arranged connecting pipe, the upper end of which is hinged to the operating arm; Three arc-shaped support claws are evenly distributed around the outer periphery of the connecting pipe; a sliding sleeve, a first fixed sleeve, and a second fixed sleeve are sequentially fitted on the annular wall of the connecting pipe from top to bottom. The first fixed sleeve and the second fixed sleeve are fixedly connected to the connecting pipe, and the sliding sleeve is slidably engaged with the connecting pipe; each of the support claws is connected to the sliding sleeve, the first fixed sleeve, and the second fixed sleeve respectively through a hinge rod. The opening and closing mechanism is provided on the upper end face of the sliding sleeve.

6. The auxiliary device for feeding a resistance furnace according to claim 5, characterized in that, The opening and closing mechanism includes a guide wheel; The connecting pipe is located on one side wall of the resistance arm, and the resistance arm is provided with an installation groove. The guide wheel is provided in the installation groove, and the guide wheel is coaxially and rotatably arranged with the internal support type lifting device. The upper end face of the sliding sleeve is fixed with a lifting lug, and the second handbrake handle includes a fixed seat connected to the right handle. A brake rod is rotatably provided on the fixed seat, and a connecting ring is provided at the free end of the brake rod away from the fixed seat. The lifting lug, guide wheel, and connecting ring are connected by the steel wire rope.

7. The auxiliary device for feeding a resistance furnace according to claim 6, characterized in that, An S-shaped guide tube is fixed on the power arm. One end of the guide tube is aligned with the center line of the groove of the guide wheel, and the other end is aligned with the center of the connecting ring. The wire rope is threaded through the guide tube.

8. The auxiliary device for feeding a resistance furnace according to claim 5, characterized in that, The outer side of each support claw away from the connecting tube is detachably provided with an anti-slip layer, which is made of flexible ceramic fiber material.

9. The auxiliary device for feeding a resistance furnace according to claim 1, characterized in that, Both the left and right handle grip sections are fitted with heat insulation layers. The heat insulation layers have a double-layer structure, with the inner layer being heat insulation cotton and the outer layer being flexible ceramic fiber cloth.

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