Surface heat treatment system for agricultural machinery gearbox shell and detection method

Abstract

The invention discloses an agricultural machinery gearbox shell surface heat treatment system and a detection method, and relates to the technical field of gearbox shell treatment, the agricultural machinery gearbox shell surface heat treatment system comprises pre-cleaning, and further comprises pre-heating treatment, carburizing and quenching treatment, post-cleaning, tempering treatment and toughness detection. The device has the advantages that not only can a rotary surrounding impact hammering test be carried out on the gearbox shell, but also a single-point impact hammering test can be carried out on the gearbox shell, so that the hammering test on the gearbox shell is more thorough, the hammering is more sufficient, the contingency is reduced, and the finished product quality of the gearbox shell is improved; the testing impact hammer can be automatically recycled after hammering is completed, the gearbox shell can be protected, the influence of the testing impact hammer on the next testing impact hammer is reduced, the hammering efficiency of the testing impact hammer is improved, meanwhile, the vibration amplitude of the gearbox shell in the hammering process can be reduced, and the service life of the gearbox shell is prolonged. Therefore, the contact between the test impact hammer and the gearbox housing is tighter, and the hammering accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gearbox housing processing, and in particular to a surface heat treatment system and detection method for a gearbox housing of an agricultural machinery. Background Art

[0002] The heat-shock-resistant gearbox housing is a type of gearbox housing. It is an ordinary gearbox housing that is processed through a special process to form a heat-shock-resistant gearbox housing. It has higher high-temperature resistance than ordinary gearbox housings and a longer service life.

[0003] The agricultural machinery gearbox housing is an information function gearbox housing material that can convert mechanical energy and electrical energy into each other. It is mainly made of a heat-shock-resistant gearbox housing. In order to ensure the quality of the heat-shock-resistant gearbox housing so that it can be used to make agricultural machinery gearbox housings, it is necessary to perform a hammer strength test on the heat-shock-resistant gearbox housing after production. Publication number CN115855697A discloses a heat-shock-resistant ceramic strength testing machine based on rotary hammering, which includes a test equipment base, the upper end of the test equipment base is connected to a support frame, the upper end of the support frame is connected to a fixed hanger, the upper end of the test equipment base is provided with a sliding groove, the interior of the sliding groove is connected to a positioning assembly, and the positioning assembly includes a clamping plate.

[0004] The testing machine has the following deficiencies during its specific use: during the gearbox housing strength test, only one side of the gearbox housing can be subjected to impact hammering test. Resonance will occur during the hammering process, which will affect the accuracy of the hammering test results. At the same time, the gearbox housing cannot be subjected to a circumferential hammering test, and the test results are somewhat random. When conducting the gearbox housing strength test, the impact hammering force is increased by adding a counterweight, but the setting of the counterweight also increases the air resistance encountered by the hammering test, and the accuracy of the impact force cannot be accurately controlled. At the same time, the length of the impact arm needs to be adjusted according to the size of the gearbox housing, and the operation is relatively cumbersome.

[0005] Therefore, a new surface heat treatment system and detection method for agricultural machinery gearbox housing can be used to solve the shortcomings of the existing technology. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems in the prior art that hammer tests have certain randomness and the hammer test force control is relatively cumbersome, and to propose a surface heat treatment system for the agricultural machinery gearbox housing.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A surface heat treatment system for an agricultural machinery gearbox housing, comprising pre-cleaning, preheating treatment, carburizing and quenching treatment, post-cleaning, tempering treatment, and toughness testing;

[0009] The equipment used includes a trolley-type gas furnace, as well as a quenching machine, a box-type resistance furnace, and testing equipment;

[0010] First, the gearbox housing is cleaned before processing. After cleaning, the gearbox housing is placed in a trolley-type gas furnace for normalizing preheating treatment to eliminate casting residual stress and improve dimensional stability. The heating temperature is 500℃-550℃, and after heating, it is kept warm and stored for 2 hours;

[0011] Then, the preheated gearbox housing is taken out from the trolley-type gas furnace and placed in the quenching machine for quenching treatment to refine the pearlite structure, improve the hardness and wear resistance, heat to 880℃-920℃, and keep warm for 1 hour;

[0012] After quenching, the gearbox housing is taken out and placed in a box-type resistance furnace for tempering to eliminate the internal stress of the gearbox housing. The heating temperature is 150℃-250℃ and kept warm for 1 hour. Finally, the toughness test of the treated gearbox housing is carried out by the testing equipment.

[0013] A surface heat treatment detection equipment for an agricultural machinery gearbox housing, used for toughness testing in the surface heat treatment system of the above-mentioned agricultural machinery gearbox housing, comprises a base, wherein a test support ring is fixedly installed on the base through a plurality of support rods, a test support ring is fixedly installed on the test support frame, a driving motor is fixedly installed on the test support frame, a test hammer ring is fixedly installed on the test support frame, and a plurality of fixed side plates are fixedly installed on the test hammer ring, and a rotating rod is jointly rotatably installed between two matching fixed side plates, a spring coil is fixedly installed between each rotating rod and the corresponding fixed side plate, a rotating support rod is fixedly installed on each rotating support rod, a movable sleeve rod is fixedly installed on each movable sleeve rod, a telescopic slide rod is slidably installed on each telescopic slide rod, a test impact hammer is rotatably installed on each telescopic slide rod through a rotating shaft, and a linkage mechanism and a reset mechanism are installed between each telescopic slide rod and the corresponding movable sleeve rod;

[0014] A pressing mechanism is installed between the driving motor and the plurality of rotating support rods;

[0015] A limit bracket is fixedly installed on the test hammer ring, a lifting ring is slidably installed on the limit bracket through multiple friction columns, a lifting mechanism is installed between the lifting ring and the drive motor, and multiple connecting rods are slidably installed on the lifting ring, and a stop block is fixedly installed on the multiple matching connecting rods;

[0016] A plurality of slides are slidably mounted on the base, a support block is mounted on each of the slides via a plurality of spring rods, a pressing rubber block is fixedly mounted on each of the support blocks, and an adjustment mechanism is mounted between the base and one of the slides.

[0017] In the above-mentioned surface heat treatment system for the agricultural machinery gearbox housing, the linkage mechanism includes a movable bracket, a rotating rod and a pressure block. The movable bracket is fixedly installed on the movable sleeve rod and the telescopic slide rod. A rotating rod is rotatably installed on each of the two movable brackets. A pressure block that cooperates with the pressure block is rotatably installed on the end of the two rotating rods away from the corresponding movable bracket.

[0018] In the above-mentioned surface heat treatment system for the agricultural machinery gearbox housing, the reset mechanism includes a roller and a reset spring, a plurality of rollers are rotatably installed in the movable sleeve rod and are abutted against the telescopic slide rod, and a plurality of reset springs are fixedly installed between the telescopic slide rod and the movable sleeve rod.

[0019] In the above-mentioned surface heat treatment system for the gearbox housing of an agricultural machinery, the pressing mechanism includes a pressing plate, a positioning bracket, a pressing plate, a clamping column, a one-way bearing and a movable groove;

[0020] A one-way bearing is fixedly installed on the driving end of the driving motor, a back plate is fixedly installed on the outer ring of the one-way bearing, two positioning brackets are fixedly installed on the test hammer ring, and a pressure plate that cooperates with the back plate is slidably installed on the two positioning brackets. Two clamping columns are fixedly installed on the pressure plate, and two movable grooves that cooperate with the corresponding clamping columns are provided on the rotating support rod.

[0021] In the above-mentioned surface heat treatment system for the gearbox housing of an agricultural machinery, the lifting mechanism includes a reciprocating screw rod, a ball nut, a one-way bearing, and a connecting bracket;

[0022] A one-way bearing 2 is fixedly mounted on the driving end of the driving motor, a reciprocating screw 1 is fixedly mounted on the outer ring of the one-way bearing 2, a ball nut 1 is mounted on the reciprocating screw 1, a connecting bracket is fixedly mounted on the ball nut 1, and a driving structure is installed between the ball nut 1 and multiple connecting rods.

[0023] In the above-mentioned surface heat treatment system for the gearbox housing of an agricultural machinery, the driving structure includes a fixed disc, a gear ring, a linkage push rod, a second reciprocating screw, a second ball nut and a gear;

[0024] A reciprocating screw rod 2 is rotatably mounted on the lifting ring, a ball nut 2 is matched with the reciprocating screw rod 2, and the ball nut 2 is fixedly connected to a plurality of connecting rods;

[0025] A gear is fixedly installed on the other end of the reciprocating screw rod 2, and a plurality of linked push rods are rotatably installed on the ball nut 1. A fixed disc is fixedly installed on the plurality of linked push rods. The fixed disc and the reciprocating screw rod 1 are slidably connected through a slide groove, and a gear ring engaged with the gear is fixedly installed on the fixed disc.

[0026] In the above-mentioned surface heat treatment system of the agricultural machinery gearbox housing, the adjustment mechanism includes a fixed baffle and an electric push rod, the fixed baffle is fixedly installed on the base, the electric push rod is fixedly installed on the fixed baffle, the driving end of the electric push rod is fixedly connected to one of the slides, and a linkage structure is installed between the multiple slides.

[0027] In the above-mentioned surface heat treatment system of the agricultural machinery gearbox housing, the linkage structure includes an arc-shaped elastic telescopic rod and a single piece, two gaskets are fixedly installed on each of the slides, and an arc-shaped elastic telescopic rod is fixedly installed between the corresponding gaskets on the two adjacent slides.

[0028] The present invention also provides a method for detecting a surface of an agricultural machinery gearbox housing after heat treatment, comprising the above-mentioned device for detecting a surface of an agricultural machinery gearbox housing after heat treatment, and further comprising the following steps:

[0029] S1. Place the gearbox housing between the multiple pressing rubber blocks on the base, and then use the adjustment mechanism to drive the slide to move to clamp and fix the gearbox housing;

[0030] Then the driving motor rotates, which causes the pressing rotating support rod to rotate around the rotating column through the pressing mechanism. The rotation of the rotating support rod drives the test impact hammer, the telescopic slide rod and the movable sleeve rod to rotate, thereby achieving the purpose of hammering;

[0031] S2. The operation of the driving end of the driving motor will drive the lifting ring to move through the lifting mechanism. The lifting and lowering of the lifting ring changes the length of the telescopic slide rod extending out of the movable sleeve rod, thereby achieving the purpose of hammering test at different positions of the gearbox housing;

[0032] S3. The movable sleeve rod and the telescopic slide rod are stretched apart by the linkage mechanism, thereby driving the telescopic slide rod to slide in the movable sleeve rod, thereby achieving the purpose of changing the position of the test impact hammer.

[0033] S4. Under the action of the reset mechanism, the telescopic slide rod is pulled to retract into the movable sleeve rod, and the test impact hammer is recovered at this time.

[0034] Compared with the existing technology, the advantages of the present invention are:

[0035] 1: The present invention can test the hammering strength of the gearbox housing more thoroughly and fully. It can not only perform a rotating impact hammer test on the gearbox housing, but also perform a single-point impact hammer test on the gearbox housing, thereby improving the accuracy of the gearbox housing test, reducing contingency, and improving the quality of the finished gearbox housing.

[0036] 2: The present invention can quickly complete the hammer test on the gearbox housing, and there is no need to move or flip the gearbox housing during the test, which improves the hammering effect of the gearbox housing. During the hammering process, there is no need for the operator to manually operate or move the gearbox housing, which reduces the labor intensity of the gearbox housing test and improves the efficiency of the gearbox housing strength test.

[0037] 3: The present invention can improve the accuracy of the gearbox housing strength test, and uses the pressing rubber block to buffer the vibration generated by hammering on the gearbox housing, which can reduce the vibration amplitude of the gearbox housing during the hammering process, making the test impact hammer and the gearbox housing in closer contact, further reducing the randomness of the hammering test.

[0038] 4: The present invention can automatically adjust the height of the test impact hammer according to the hammering position of the gearbox housing, and hammer different points of the gearbox housing to ensure that the test impact hammer and the gearbox housing are fully fitted for hammering. No manual adjustment is required, and the operation is convenient. At the same time, the test impact hammer can be automatically recovered after the hammering is completed, which can protect the gearbox housing, reduce the impact of the test impact hammer on the next test impact hammer, and improve the hammering efficiency of the test impact hammer.

[0039] To sum up, the present invention can not only perform a rotating circumferential impact hammer test on the gearbox housing, but also perform a single-point impact hammer test on the gearbox housing, so that the hammering test on the gearbox housing is more thorough, the hammering is more sufficient, the randomness is reduced, and the quality of the finished product of the gearbox housing is improved. The test impact hammer can be automatically recovered after the hammering is completed, and the gearbox housing can be protected, reducing the impact of the test impact hammer on the next test impact hammer, improving the hammering efficiency of the test impact hammer, and at the same time reducing the vibration amplitude of the gearbox housing during the hammering process, so that the test impact hammer and the gearbox housing are in closer contact, and the accuracy of the hammering is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0041] Figure 1 This is a schematic structural diagram of a surface heat treatment system for an agricultural machinery gearbox housing proposed by the present invention;

[0042] Figure 2 for Figure 1 Detailed schematic diagram of the structure viewed from above;

[0043] Figure 3 for Figure 1 Enlarged structural schematic details of the middle base and positioning block;

[0044] Figure 4 for Figure 1 A detailed diagram of the enlarged structure of the test hammer and the fixing ring;

[0045] Figure 5 for Figure 4 Detailed schematic diagram of the structure viewed from above;

[0046] Figure 6 for Figure 5 A detailed diagram of the enlarged structure of the test hammer and the movable sleeve rod;

[0047] Figure 7 for Figure 6 Detailed schematic diagram of the structure from side view;

[0048] Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure of the middle movable sleeve rod;

[0049] Figure 9 for Figure 1 A detailed diagram of the enlarged structure of the middle drive motor and the lifting ring;

[0050] Figure 10 for Figure 9 Detailed schematic diagram of the partial explosion structure;

[0051] Figure 11 for Figure 10 A detailed diagram of the enlarged structure of the second part of the reciprocating screw;

[0052] Figure 12 This is the flow chart of the heat treatment system for the gearbox housing.

[0053] In the figure: 1 base, 2 support rod, 3 test support ring, 4 test support frame, 5 drive motor, 6 slide plate, 7 spring rod, 8 support block, 9 pressure rubber block, 10 arc elastic telescopic rod, 11 fixed baffle, 12 electric push rod, 13 test hammer ring, 14 test impact hammer, 15 discharge hole, 16 telescopic slide rod, 17 movable sleeve rod, 18 pressure plate, 19 positioning bracket, 20 rotating support rod, 21 lifting ring, 22 pressure plate, 23 limit bracket, 24 friction column, 25 fixed disc, 26 reciprocating screw rod 1, 27 gear ring, 28 ball nut 1, 29 linked push rod, 30 reciprocating screw rod 2, 31 pressure block, 32 ball nut 2, 33 connecting rod, 34 gear, 35 rotating shaft, 36 spring roll 1, 37 movable bracket, 38 rotating rod, 39 pressure block, 40 roller, 41 return spring, 42 fixed side plate. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0055] refer to Figure 12 , a surface heat treatment system for an agricultural machinery gearbox housing, including pre-cleaning, preheating treatment, carburizing and quenching treatment, post-cleaning, tempering treatment and toughness testing;

[0056] The equipment used includes a trolley-type gas furnace, as well as a quenching machine, a box-type resistance furnace, and testing equipment;

[0057] First, the gearbox housing is hoisted on the cleaning equipment, and then the gearbox housing is cleaned before processing. After cleaning, the gearbox housing is placed in a trolley-type gas furnace for normalizing preheating treatment to eliminate casting residual stress and improve dimensional stability. The heating temperature is 500℃-550℃, and the housing is kept warm and stored for 2 hours after heating.

[0058] Then, the preheated gearbox housing is taken out from the trolley-type gas furnace and placed in the quenching machine for quenching treatment to refine the pearlite structure, improve the hardness and wear resistance, heat to 880℃-920℃, and keep warm for 1 hour;

[0059] After quenching is completed, take out the gearbox housing and put it into a box-type resistance furnace for tempering to eliminate the internal stress of the gearbox housing. The heating temperature is 150℃-250℃ and kept warm for 1 hour.

[0060] Finally, the toughness test of the treated gearbox casing is carried out using testing equipment.

[0061] Embodiment 1: A surface heat treatment detection equipment for an agricultural machinery gearbox housing, used for toughness testing in the surface heat treatment system of the above-mentioned agricultural machinery gearbox housing, comprising a base 1, a test support ring 3 is fixedly mounted on the base 1 through a plurality of support rods 2, a test support frame 4 is fixedly mounted on the test support ring 3, a drive motor 5 is fixedly mounted on the test support frame 4, a test hammer ring 13 is fixedly mounted on the test support frame 4, a plurality of fixed side plates 42 are fixedly mounted on the test hammer ring 13, a rotating column is mounted between two matching fixed side plates 42 for common rotation, a spring coil 2 is fixedly mounted between each rotating column and the corresponding fixed side plate 42, a rotating support rod 20 is fixedly mounted on each rotating support rod 20, a movable sleeve rod 17 is fixedly mounted on each movable sleeve rod 17, a telescopic slide rod 16 is slidably mounted on each movable sleeve rod 17, a test impact hammer 14 is rotatably mounted on each telescopic slide rod 16 through a rotating shaft 35, and a linkage mechanism and a reset mechanism are mounted between each telescopic slide rod 16 and the corresponding movable sleeve rod 17;

[0062] The linkage mechanism includes a movable bracket 37, a rotating rod 38, and a pressing block 39. The movable bracket 37 is fixedly mounted on the movable sleeve rod 17 and the telescopic slide rod 16. A rotating rod 38 is rotatably mounted on each of the two movable brackets 37. A pressing block 39 that cooperates with the pressing block 31 is rotatably mounted on the ends of the two rotating rods 38 away from the corresponding movable bracket 37.

[0063] As the rotating support rod 20 rotates, the pressing block 39 and the pressing block 31 will abut against each other, and the pressing will increase the angle between the two rotating rods 38, thereby expanding the movable sleeve rod 17 and the telescopic slide rod 16, thereby driving the telescopic slide rod 16 to slide inside the movable sleeve rod 17, thereby achieving the purpose of changing the position of the test impact hammer 14;

[0064] Impact hammer tests can be performed on different parts of the gearbox housing as needed. The test coverage is wider, the test results are more accurate and convincing, and the probability of accidental errors during the test process is reduced.

[0065] The reset mechanism includes a roller 40 and a reset spring 41. A plurality of rollers 40 are rotatably mounted in the movable sleeve 17 to abut against the telescopic slide 16. A plurality of reset springs 41 are fixedly mounted between the telescopic slide 16 and the movable sleeve 17.

[0066] As the pressing block 39 separates from the pressing block 31, the telescopic slide rod 16 will be pulled by the reset spring 41 to retract into the movable sleeve rod 17. At this time, the test impact hammer 14 can be recovered, reducing the impact of the test impact hammer on the next test impact hammer 14 and improving the hammering efficiency of the test impact hammer 14.

[0067] Example 2: This example differs from the example 1 in that: Figure 1 、 Figure 6-Figure 7 , a pressing mechanism is installed between the driving motor 5 and the plurality of rotating support rods 20;

[0068] The pressing mechanism includes a pressing plate 18, a positioning bracket 19, a pressing plate 22, a clamping column, a one-way bearing and a movable groove;

[0069] A one-way bearing 1 is fixedly mounted on the driving end of the driving motor 5, a butt plate 22 is fixedly mounted on the outer ring of the one-way bearing 1, two positioning brackets 19 are fixedly mounted on the test hammer ring 13, a pressure plate 18 cooperating with the butt plate 22 is slidably mounted on the two positioning brackets 19, two clamping columns are fixedly mounted on the pressure plate 18, and two movable grooves cooperating with the corresponding clamping columns are provided on the rotating support rod 20;

[0070] The driving motor 5 rotates to drive the one-way bearing to rotate, thereby driving the support plate 22 to rotate. The rotation of the support plate 22 presses the pressure plate 18 to move the pressure plate 18. As the pressure plate 18 slides on the positioning bracket 19, it presses the rotating support rod 20 to rotate around the rotating column. The rotation of the rotating support rod 20 causes the clamping column to slide in the movable groove. The rotation of the rotating support rod 20 drives the test impact hammer 14, the telescopic slide rod 16 and the movable sleeve rod 17 to rotate, thereby achieving the purpose of hammering.

[0071] This part can not only perform rotating impact hammer test on the gearbox housing, but also perform single-point impact hammer test on the gearbox housing, making the hammer test on the gearbox housing more thorough, the hammering more sufficient, and the hammering results more representative, thereby improving the accuracy of the gearbox housing test, reducing randomness, and improving the quality of the gearbox housing finished product.

[0072] Example 3: This example differs from the technical solution of Example 2 in that: Figure 1-Figure 2 、 Figures 9-11 A limit bracket 23 is fixedly installed on the test hammer ring 13, and a lifting ring 21 is slidably installed on the limit bracket 23 through a plurality of friction columns 24. A lifting mechanism is installed between the lifting ring 21 and the drive motor 5. A plurality of connecting rods 33 are slidably installed on the lifting ring 21, and a stop block 31 is fixedly installed on the matching multiple connecting rods 33;

[0073] The lifting mechanism includes a reciprocating screw rod 26, a ball nut 28, a one-way bearing 2 and a connecting bracket;

[0074] A one-way bearing 2 is fixedly mounted on the driving end of the driving motor 5, a reciprocating screw 26 is fixedly mounted on the outer ring of the one-way bearing 2, a ball nut 28 is mounted on the reciprocating screw 26, a connecting bracket is fixedly mounted on the ball nut 28, and a driving structure is installed between the ball nut 28 and the multiple connecting rods 33;

[0075] The driving end of the driving motor 5 drives the one-way bearing 2 to rotate (at this time, the one-way bearing 1 does not rotate, and the support plate 22 does not rotate), thereby driving the reciprocating screw 1 26 to rotate. The rotation of the reciprocating screw 1 26 drives the ball nut 1 28 to move on the reciprocating screw 1 26, thereby achieving the lifting and lowering of the lifting ring 21. The lifting and lowering of the lifting ring 21 can control the angle between the two rotating rods 38 when the support block 31 and the pressure block 39 are in contact with each other, thereby changing the length of the telescopic slide rod 16 extending out of the movable sleeve rod 17, thereby achieving the purpose of hammering test on different positions of the gearbox housing;

[0076] The position of the test impact hammer 14 can be automatically adjusted to ensure that the test impact hammer 14 is fully fitted with the gearbox housing for hammering. No manual adjustment is required, and the operation is convenient. At the same time, the test impact hammer 14 can be automatically recovered after the hammering is completed, which can protect the gearbox housing, reduce the impact of the test impact hammer on the next test impact hammer 14, and improve the hammering efficiency of the test impact hammer 14.

[0077] The driving structure includes a fixed disc 25, a gear ring 27, a linkage push rod 29, a reciprocating screw rod 30, a ball nut 32 and a gear 34;

[0078] A reciprocating screw rod 30 is rotatably mounted on the lifting ring 21, and a ball nut 32 is mounted on the reciprocating screw rod 30. The ball nut 32 is fixedly connected to a plurality of connecting rods 33.

[0079] A gear 34 is fixedly mounted on the other end of the reciprocating screw rod 2 30 , and a plurality of linkage push rods 29 are rotatably mounted on the ball nut 1 28 . A fixed disc 25 is fixedly mounted on the plurality of linkage push rods 29 . The fixed disc 25 is slidably connected to the reciprocating screw rod 1 26 via a slide groove. A gear ring 27 meshing with the gear 34 is fixedly mounted on the fixed disc 25 .

[0080] The rotation of the reciprocating screw 1 26 drives the fixed disc 25 and the gear ring 27 to rotate. The rotation of the gear ring 27 drives the gear 34 meshing therewith to rotate. The rotation of the gear 34 drives the reciprocating screw 2 30 to rotate, so that the ball nut 2 32 moves on the reciprocating screw 2 30, thereby achieving the purpose of adjusting the position of the block 31 and ensuring that the block 31 and the pressure block 39 maintain a matched state.

[0081] At the same time, the connecting rod 33 causes the gear ring 27 to move along with the lifting ring 21, thereby ensuring that the gear ring 27 and the gear 34 are always engaged, and the purpose of real-time adjustment can be achieved by always engaging;

[0082] Not only can the gearbox housing be subjected to a rotating circumferential impact hammer test, but also a single-point impact hammer test, making the hammer test on the gearbox housing more thorough, the hammering more sufficient, and the hammering results more representative, thereby improving the accuracy of the gearbox housing test, reducing randomness, and improving the quality of the gearbox housing finished product.

[0083] Reference Figure 1 、 Figure 3 , a plurality of slides 6 are slidably installed on the base 1, a support block 8 is installed on each slide 6 through a plurality of spring rods 7, and a pressing rubber block 9 is fixedly installed on each support block 8, and an adjustment mechanism is installed between the base 1 and one of the slides 6;

[0084] The adjustment mechanism includes a fixed baffle 11 and an electric push rod 12. The fixed baffle 11 is fixedly mounted on the base 1, and the electric push rod 12 is fixedly mounted on the fixed baffle 11. The driving end of the electric push rod 12 is fixedly connected to one of the slides 6, and a linkage structure is installed between the multiple slides 6;

[0085] The slide plate 6 is pushed by the electric push rod 12. The movement of the slide plate 6 can change the elastic force of the spring rod 7 (when the gearbox housing is already clamped), or change the position of the support block 8 and the pressing rubber block 9 (when the gearbox housing is clamped). In this way, the vibration generated by hammering on the gearbox housing is buffered, which can reduce the vibration amplitude of the gearbox housing during the hammering process, make the test impact hammer 14 contact with the gearbox housing more closely, improve the accuracy of hammering to a certain extent, and further reduce the randomness of the hammering test.

[0086] The linkage structure includes an arc-shaped elastic telescopic rod 10 and a single piece. Two gaskets are fixedly installed on each slide 6, and an arc-shaped elastic telescopic rod 10 is fixedly installed between the corresponding gaskets on two adjacent slides 6;

[0087] The movement of one of the slides 6 will drive the arc-shaped elastic telescopic rod 10 to move, thereby driving multiple slides 6 to move simultaneously, and the arc-shaped elastic telescopic rod 10 will extend and retract when moving;

[0088] The function of this part is to ensure that multiple pressing rubber blocks 9 move simultaneously to clamp and fix the gearbox housing, thereby improving the stability of the gearbox housing during the hammering process and also reducing the amplitude, making the test go more smoothly.

[0089] The base 1 is provided with a discharge hole 15, and the gearbox housing that is broken due to unqualified hammering is discharged and cleaned out from the discharge hole 15, which has a high cleaning efficiency and is convenient to use.

[0090] The specific operation steps of the present invention are:

[0091] Place the gearbox housing between the multiple pressing rubber blocks 9 on the base 1, then turn on the electric push rod 12 and push the slide plate 6 to clamp and fix the gearbox housing;

[0092] Then the driving motor 5 rotates to drive the one-way bearing to rotate, thereby driving the support plate 22 to rotate. The rotation of the support plate 22 presses the pressure plate 18 to move the pressure plate 18. As the pressure plate 18 slides on the positioning bracket 19, it presses the rotating support rod 20 to rotate around the rotating column. The rotation of the rotating support rod 20 causes the clamping column to slide in the movable groove. The rotation of the rotating support rod 20 drives the test impact hammer 14, the telescopic slide rod 16 and the movable sleeve rod 17 to rotate, thereby achieving the purpose of hammering.

[0093] The driving end of the driving motor 5 drives the one-way bearing 2 to rotate (at this time, the one-way bearing 1 does not rotate, and the support plate 22 does not rotate), thereby driving the reciprocating screw 1 26 to rotate. The rotation of the reciprocating screw 1 26 drives the ball nut 1 28 to move on the reciprocating screw 1 26, thereby achieving the lifting and lowering of the lifting ring 21. The lifting and lowering of the lifting ring 21 can control the angle between the two rotating rods 38 when the support block 31 and the pressure block 39 are in contact with each other, thereby changing the length of the telescopic slide rod 16 extending out of the movable sleeve rod 17, thereby achieving the purpose of hammering test on different positions of the gearbox housing;

[0094] The rotation of the reciprocating screw 1 26 drives the fixed disc 25 and the gear ring 27 to rotate. The rotation of the gear ring 27 drives the gear 34 meshing therewith to rotate. The rotation of the gear 34 drives the reciprocating screw 2 30 to rotate, so that the ball nut 2 32 moves on the reciprocating screw 2 30, thereby achieving the purpose of adjusting the position of the block 31 and ensuring that the block 31 and the pressure block 39 maintain a matched state.

[0095] At the same time, the connecting rod 33 causes the gear ring 27 to move along with the lifting ring 21, thereby ensuring that the gear ring 27 and the gear 34 are always engaged, and the purpose of real-time adjustment can be achieved by always engaging;

[0096] As the rotating support rod 20 rotates, the pressing block 39 and the pressing block 31 will abut against each other, and the pressing will increase the angle between the two rotating rods 38, thereby expanding the movable sleeve rod 17 and the telescopic slide rod 16, thereby driving the telescopic slide rod 16 to slide inside the movable sleeve rod 17, thereby achieving the purpose of changing the position of the test impact hammer 14;

[0097] As the pressing block 39 separates from the stop block 31 , the telescopic slide rod 16 is pulled by the return spring 41 so as to be retracted into the movable sleeve rod 17 . At this time, the test impact hammer 14 can be recovered.

[0098] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A surface heat treatment system for an agricultural machinery gearbox housing, including pre-cleaning, characterized in that: It also includes preheat treatment, carburizing and quenching treatment, post-cleaning, tempering treatment and toughness testing; The equipment used includes a trolley-type gas furnace, a quenching machine, a box-type resistance furnace, and testing equipment; First, the gearbox housing is cleaned before processing. After cleaning, the gearbox housing is placed in a trolley-type gas furnace for normalizing preheating treatment to eliminate casting residual stress and improve dimensional stability. The heating temperature is 500℃-550℃, and after heating, it is kept warm and stored for 2 hours; Then, the preheated gearbox housing is taken out from the trolley-type gas furnace and placed in the quenching machine for quenching treatment to refine the pearlite structure, improve the hardness and wear resistance, heat to 880℃-920℃, and keep warm for 1 hour; After quenching is completed, the gearbox housing is taken out and placed in a box-type resistance furnace for tempering to eliminate the internal stress of the gearbox housing. The heating temperature is 150℃-250℃ and kept warm for 1 hour. Finally, the toughness test of the treated gearbox housing is carried out using testing equipment.

2. A surface heat treatment testing device for an agricultural machinery gearbox housing, used for toughness testing in the surface heat treatment system for an agricultural machinery gearbox housing according to claim 1, comprising a base (1), characterized in that: A test support ring (3) is fixedly mounted on the base (1) via a plurality of support rods (2), a test support frame (4) is fixedly mounted on the test support ring (3), a drive motor (5) is fixedly mounted on the test support frame (4), a test hammer ring (13) is fixedly mounted on the test support frame (4), a plurality of fixed side plates (42) are fixedly mounted on the test hammer ring (13), a rotating column is mounted between two matched fixed side plates (42) for common rotation, and each rotating column is connected to the corresponding fixed side plate ( 42), a spring coil is fixedly installed between each of the rotating columns, a rotating support rod (20) is fixedly installed on each of the rotating support rods (20), a movable sleeve rod (17) is fixedly installed on each of the movable sleeve rods (17), a telescopic slide rod (16) is slidably installed on each of the movable sleeve rods (17), a test impact hammer (14) is rotatably installed on each of the telescopic slide rods (16) through a rotating shaft (35), and a linkage mechanism and a reset mechanism are installed between each of the telescopic slide rods (16) and the corresponding movable sleeve rod (17); A pressing mechanism is installed between the driving motor (5) and the plurality of rotating support rods (20); A limit bracket (23) is fixedly mounted on the test hammer ring (13); a lifting ring (21) is slidably mounted on the limit bracket (23) via a plurality of friction columns (24); a lifting mechanism is installed between the lifting ring (21) and the drive motor (5); a plurality of connecting rods (33) are slidably mounted on the lifting ring (21); and a stop block (31) is fixedly mounted on the plurality of matching connecting rods (33); A plurality of slides (6) are slidably mounted on the base (1), a support block (8) is mounted on each of the slides (6) via a plurality of spring rods (7), a pressing rubber block (9) is fixedly mounted on each of the support blocks (8), and an adjustment mechanism is mounted between the base (1) and one of the slides (6).

3. The surface heat treatment detection equipment for the agricultural machinery gearbox housing according to claim 2, characterized in that: The linkage mechanism comprises a movable bracket (37), a rotating rod (38) and a pressing block (39); the movable bracket (37) is fixedly mounted on the movable sleeve rod (17) and the telescopic slide rod (16); a rotating rod (38) is rotatably mounted on each of the two movable brackets (37); and a pressing block (39) cooperating with the pressing block (31) is rotatably mounted on one end of the two rotating rods (38) away from the corresponding movable bracket (37).

4. The surface heat treatment detection equipment for the agricultural machinery gearbox housing according to claim 2, characterized in that: The reset mechanism comprises a roller (40) and a reset spring (41); a plurality of rollers (40) are rotatably mounted in the movable sleeve rod (17) and are in contact with the telescopic slide rod (16); a plurality of reset springs (41) are fixedly mounted between the telescopic slide rod (16) and the movable sleeve rod (17).

5. The surface heat treatment detection equipment for the agricultural machinery gearbox housing according to claim 2, characterized in that: The pressing mechanism comprises a pressing plate (18), a positioning bracket (19), a pressing plate (22), a clamping column, a one-way bearing and a movable groove; A one-way bearing is fixedly mounted on the driving end of the driving motor (5), a butt plate (22) is fixedly mounted on the outer ring of the one-way bearing, two positioning brackets (19) are fixedly mounted on the test hammer ring (13), a pressure plate (18) matching with the butt plate (22) is slidably mounted on the two positioning brackets (19), two clamping columns are fixedly mounted on the pressure plate (18), and two movable grooves matching with the corresponding clamping columns are provided on the rotating support rod (20).

6. The surface heat treatment detection equipment for the agricultural machinery gearbox housing according to claim 2, characterized in that: The lifting mechanism includes a reciprocating screw rod (26), a ball nut (28), a one-way bearing and a connecting bracket; A one-way bearing 2 is fixedly mounted on the driving end of the driving motor (5), a reciprocating screw rod 1 (26) is fixedly mounted on the outer ring of the one-way bearing 2, a ball nut 1 (28) is matched and mounted on the reciprocating screw rod 1 (26), a connecting bracket is fixedly mounted on the ball nut 1 (28), and a driving structure is installed between the ball nut 1 (28) and a plurality of connecting rods (33).

7. The surface heat treatment detection equipment for the agricultural machinery gearbox housing according to claim 6, characterized in that: The driving structure includes a fixed disc (25), a gear ring (27), a linkage push rod (29), a second reciprocating screw (30), a second ball nut (32) and a gear (34); A second reciprocating screw rod (30) is rotatably mounted on the lifting ring (21), a second ball nut (32) is cooperatively mounted on the second reciprocating screw rod (30), and the second ball nut (32) is fixedly connected to a plurality of connecting rods (33); A gear (34) is fixedly mounted on the other end of the reciprocating screw rod (30), and a plurality of linkage push rods (29) are rotatably mounted on the ball nut (28). A fixed disc (25) is fixedly mounted on the plurality of linkage push rods (29). The fixed disc (25) is slidably connected to the reciprocating screw rod (26) via a sliding groove, and a gear ring (27) meshing with the gear (34) is fixedly mounted on the fixed disc (25).

8. The surface heat treatment detection equipment for agricultural machinery gearbox housing according to claim 2, characterized in that: The adjustment mechanism comprises a fixed baffle (11) and an electric push rod (12); the fixed baffle (11) is fixedly mounted on the base (1); the electric push rod (12) is fixedly mounted on the fixed baffle (11); a driving end of the electric push rod (12) is fixedly connected to one of the slides (6); and a linkage structure is installed between the plurality of slides (6).

9. The surface heat treatment detection equipment for the agricultural machinery gearbox housing according to claim 8, characterized in that: The linkage structure comprises an arc-shaped elastic telescopic rod (10) and a single piece. Two gaskets are fixedly mounted on each of the slides (6), and an arc-shaped elastic telescopic rod (10) is fixedly mounted between the corresponding gaskets on two adjacent slides (6).

10. A method for detecting a surface of an agricultural machinery gearbox housing after heat treatment, used in the device for detecting a surface of an agricultural machinery gearbox housing after heat treatment according to any one of claims 2 to 9, characterized in that: The following steps are involved: S1. Place the gearbox housing between the plurality of pressing rubber blocks (9) on the base (1), and then drive the slide plate (6) to move through the adjustment mechanism to clamp and fix the gearbox housing; Then the driving motor (5) rotates, and the pressing mechanism causes the pressing rotating support rod (20) to rotate around the rotating column, and the rotating support rod (20) rotates to drive the test impact hammer (14), the telescopic slide rod (16) and the movable sleeve rod (17) to rotate, thereby achieving the purpose of hammering; S2, the driving end of the driving motor (5) drives the lifting ring (21) to move through the lifting mechanism. The lifting and lowering of the lifting ring (21) changes the length of the telescopic slide rod (16) extending out of the movable sleeve rod (17), thereby achieving the purpose of hammering test on different positions of the gearbox housing; S3, and the movable sleeve rod (17) and the telescopic slide rod (16) are stretched apart by the linkage mechanism, thereby driving the telescopic slide rod (16) to slide in the movable sleeve rod (17), thereby achieving the purpose of changing the position of the test impact hammer (14). S4. Under the action of the reset mechanism, the telescopic slide rod (16) is pulled to retract the telescopic slide rod (16) into the movable sleeve rod (17), and the test impact hammer (14) is recovered at this time.

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