An isolated step-up transformer for testing

Abstract

The present invention aims at the drawback of poor stability of the isolation step-up transformer in the prior art when it is placed, and provides an isolation step-up transformer for testing, which belongs to the technical field of transformers, and includes a cabinet, an isolation step-up transformer body fixedly arranged in the cabinet, a fixed sleeve of an annular structure arranged along the edge of the cabinet is fixedly arranged below the cabinet, and a supporting rolling mechanism and a driving mechanism are also arranged below the cabinet, the supporting rolling mechanism is arranged in the fixed sleeve and is used to support the cabinet, and the driving mechanism can be used to drive the first adjustment frame and the second adjustment frame to work separately, so as to realize the lifting and lowering of the outer lifting ring and the inner lifting ring separately. By setting the supporting rolling mechanism, the present invention can not only facilitate the movement of the isolation step-up transformer, but also has excellent stability when the isolation step-up transformer needs to be stably placed.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to an isolation step-up transformer for testing. Background Art

[0002] An isolation transformer refers to a transformer with electrical isolation between the input winding and the output winding. The isolation transformer is used to avoid accidental contact with live bodies at the same time. The isolation of the transformer is to isolate the current of the primary and secondary windings. It was used in the power industry in European countries in the early days. It is widely used in the control power supply of general circuits in the electronics industry or industrial and mining enterprises, machine tools and mechanical equipment, and the power supply of safety lighting and indicator lights. The isolation step-up transformer is an isolation transformer used for step-up. The isolation step-up transformer used for testing often needs to be moved, so rollers are generally installed at the bottom of the isolation step-up transformer for easy movement. When in use, the isolation step-up transformer needs to be placed firmly, so a brake mechanism is generally installed on the roller to prevent the isolation step-up transformer from moving during use. In actual use, it is found that due to the large overall mass of some isolation step-up transformers, the braking effect of the brake mechanism on the roller is poor, and it can generally only be used on a plane. When the isolation step-up transformer is placed on an inclined surface with a certain slope, the roller is still easy to rotate, thereby affecting the stability of the placement of the isolation step-up transformer. Summary of the invention

[0003] The present invention aims at the drawback of poor stability of the isolation step-up transformer in the prior art when it is placed, and provides an isolation step-up transformer for testing. A supporting rolling mechanism is arranged at the bottom of the isolation step-up transformer, which not only facilitates the movement of the isolation step-up transformer, but also has excellent stability when the isolation step-up transformer needs to be stably placed.

[0004] The invention object of the present invention is achieved through the following technical scheme: an isolated step-up transformer for testing, comprising:

[0005] A cabinet body, a fixing sleeve of an annular structure arranged along the edge of the cabinet body is fixedly provided under the cabinet body;

[0006] The isolation step-up transformer body is fixedly arranged in the cabinet;

[0007] A support rolling mechanism is arranged in a fixed sleeve and is used to support the cabinet, the support rolling mechanism includes an outer lifting ring arranged under the cabinet and can only be lifted longitudinally relative to the cabinet, and a plurality of supporting feet are fixedly connected to the lower end surface of the outer lifting ring; an inner lifting ring is provided inside the outer lifting ring, which can only be lifted longitudinally relative to the outer lifting ring, and a plurality of wheel seats are fixedly connected to the lower end surface of the inner lifting ring, and rollers are installed on the wheel seats; two symmetrically distributed first adjustment frames and two symmetrically distributed second adjustment frames are also arranged under the cabinet, the first adjustment frame and the second adjustment frame have the same structure, the first adjustment frame includes two sliders slidably arranged at the lower end of the cabinet, a fixing rod is fixedly connected between the two first sliders, a screw sleeve is fixedly connected to the fixing rod, a first connecting seat is fixedly arranged below the slider, the lower end of the first connecting seat is rotatably connected to the support rod, and the second connecting seat is rotatably connected below the support rod, the second connecting seat in the first adjusting frame is fixed to the upper end surface of the outer lifting ring, and the four second connecting seats on the outer lifting ring are distributed in a rectangular array, and the second connecting seat in the second adjusting frame is fixed to the upper end surface of the inner lifting ring, and the four second connecting seats on the inner lifting ring are distributed in a rectangular array;

[0008] The driving mechanism can be used to drive the first adjusting frame and the second adjusting frame to work separately, so as to realize the lifting and lowering of the outer lifting ring and the inner lifting ring separately. The driving mechanism comprises two driven rods and an active rod located under the cabinet body, the two driven rods are parallel to each other and can only be rotatably installed on the fixed sleeve, each driven rod is provided with two sections of external threads with opposite spiral directions, the screw sleeves in the two first adjusting frames are sleeved on one of the driven rods, and the two screw sleeves on the driven rod are respectively screwed with the two sections of external threads, the screw sleeves in the two second adjusting frames are sleeved on the other driven rod, and the two screw sleeves on the driven rod are respectively screwed with the two sections of external threads, the driven rod is also fixed with a driven gear coaxially arranged with the driven rod; two sets of locking devices are also provided outside the fixed sleeve, which are respectively used to lock the two driven rods; the inner side of the fixed sleeve is also fixedly connected to the base, and the base is provided with a first shaft sleeve, and the first shaft sleeve and the base are rotatably connected by setting a rotating shaft, the rotating shaft is vertically arranged, and the active rod is arranged The gear train is a gear that is fixedly connected to the drive gear of the vehicle and is used for driving the vehicle body to drive the transmission gear of the vehicle.

[0009] In the above scheme, the first adjustment frame and the second adjustment frame can be driven respectively by the driving mechanism, so as to realize the control of the lifting and lowering of the outer lifting ring with the support foot and the inner lifting ring with the roller. When the roller is lower than the lower end of the support foot, the roller rolling can facilitate the movement of the isolation step-up transformer on the bottom surface, which is the moving state. When the lower end of the support foot is lower than the roller, the roller does not contact the bottom surface. The isolation step-up transformer can be stably placed on the bottom surface through the support of the support foot. At this time, it is the placement state. There is no braking mechanism such as a brake, so even if it is placed on an inclined surface, the roller will not roll due to braking problems. The two driven rods can be locked respectively by the provided locking device, so as to maintain the position state of the support foot and the roller, and finally the isolation step-up transformer can have excellent stability. At the same time, the first adjustment frame and the second adjustment frame are driven respectively by the driving mechanism through switching, which is very convenient to use without the need to set a separate driving mechanism. The two first adjustment frames are symmetrically distributed, and the two second adjustment frames are also symmetrically distributed, so when the first adjustment frame drives the outer lifting ring to rise and fall, and the second adjustment frame drives the inner lifting ring to rise and fall, the outer lifting ring and the inner lifting ring are subjected to more uniform force, so that the lifting is more stable.

[0010] Preferably, the locking device comprises a ratchet coaxially fixedly connected to the driven rod, a pawl cooperating with the ratchet is rotatably connected to the outside of the fixed sleeve, and a spring is fixedly arranged between the pawl and the fixed sleeve to press the pawl on the ratchet. The state of the driven rod is locked by the structure of the ratchet pawl, which has a simple structure and an excellent locking effect.

[0011] Preferably, a knob is fixedly connected to the pawl, and the pawl is driven to rotate and separate from the ratchet wheel by pushing the knob, thereby completing the state locking of the driven rod.

[0012] Preferably, there are four supporting feet, which are distributed in a rectangular array; there are four wheel seats, which are also distributed in a rectangular array, the symmetry plane between the two first adjustment frames and the symmetry plane between the two second adjustment frames are the same symmetry plane, the four supporting feet are also divided into two groups and symmetrically distributed on both sides of the symmetry plane, and the four wheel seats are also divided into two groups and symmetrically distributed on both sides of the symmetry plane. This arrangement can further improve the stability of the present invention.

[0013] Preferably, a first guide mechanism is further provided between the outer lifting ring and the cabinet, the first guide mechanism comprising four guide posts vertically fixedly arranged on the lower end surface of the cabinet, the cross section of the support foot is an annular structure, the four support feet correspond to the four guide posts one by one and the support feet are sleeved on the outside of the corresponding guide posts; the outer wall of the outer lifting ring fits with the inner wall of the fixed sleeve. Through the cooperation between the support feet and the guide posts, and the cooperation between the outer wall of the outer lifting ring and the inner wall of the fixed sleeve, the lifting of the outer lifting ring can play a double guiding role, making the lifting of the outer lifting ring more stable.

[0014] Preferably, a second guide mechanism is provided between the outer lifting ring and the inner lifting ring, the second guide mechanism comprises a plurality of vertical grooves arranged on the outer side of the inner lifting ring and penetrating the upper and lower end faces of the inner lifting ring, a plurality of protrusions corresponding to the vertical grooves are fixedly provided on the inner side of the outer lifting ring, the protrusions are arranged in the corresponding vertical grooves and can only slide longitudinally along the vertical grooves, and the inner wall of the outer lifting ring is in contact with the outer wall of the inner lifting ring. This arrangement can make the lifting of the inner lifting ring very stable.

[0015] Preferably, the lower end surface of the cabinet is further provided with a guide groove for guiding the sliding of the slider, and the slider is slidably arranged in the guide groove.

[0016] Preferably, a rotating disk fixedly connected to the active rod is provided outside the fixing seat, and a handle is fixedly connected to the rotating disk. The active rod can be manually driven to rotate through the cooperation between the handle and the rotating disk.

[0017] Preferably, the outer lifting ring and the inner lifting ring are both square ring structures, and the inner lifting ring is also fixedly connected to a bottom plate that can cover the lower end of the hollow part of the inner lifting ring, and the bottom plate is provided with a vent. The bottom plate can play a certain protective role, and the provision of the vent can keep the internal air pressure of the fixed sleeve consistent with the outside, so as not to affect the lifting and lowering of the outer lifting ring and the inner lifting ring.

[0018] Preferably, the locking member comprises a column with a cylindrical structure, the column can simultaneously pass through the mutually aligned positioning hole and the locking hole, and a handle is fixedly connected to the upper end of the column.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the present invention can respectively drive the first adjustment frame and the second adjustment frame through one driving mechanism, and then respectively control the lifting and lowering of the outer lifting ring with the supporting legs and the inner lifting ring with the rollers, so that the present invention can switch between the mobile state and the placed state, and the switching process is very stable, and no braking mechanism such as brakes is set, so even if it is placed on a slope, the rollers will not roll due to braking problems, and it has excellent stability, is easy to operate and saves effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereogram of the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a three-dimensional diagram of the present invention after removing the cabinet and the isolation step-up transformer body;

[0023] Figure 4 A three-dimensional diagram of the connection structure between the supporting rolling mechanism and the driving mechanism;

[0024] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0025] Figure 6 It is a three-dimensional diagram of the connection structure between the cabinet body and the fixing sleeve;

[0026] Figure 7 It is the front view of the locking part;

[0027] Markings in the figure: 1, cabinet, 2, isolation step-up transformer body, 3, support rolling mechanism, 4, fixing sleeve, 5, outer lifting ring, 6, supporting foot, 7, guide column, 8, inner lifting ring, 9, vertical groove, 10, bump, 11, wheel seat, 12, roller, 13, first adjustment frame, 14, second adjustment frame, 15, slider, 16, fixing rod, 17, screw sleeve, 18, first connecting seat, 19, supporting rod, 20, second connecting seat, 21, guide groove, 22, bottom plate, 23, vent hole, 2 4. driving mechanism, 25. driven rod, 26. active rod, 27. external thread, 28. driven gear, 29. locking device, 30. ratchet, 31. pawl, 32. spring, 33. knob, 34. base, 35. first sleeve, 36. rotating shaft, 37. active gear, 38. through groove, 39. fixed seat, 40. arc groove, 41. second sleeve, 42. positioning hole, 43. locking hole, 44. locking piece, 45. column, 46. handle, 47. turntable, 48. handle. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: Example 1

[0029] like Figure 1-Figure 7 As shown, an isolated step-up transformer for testing comprises:

[0030] A cabinet body 1, a fixing sleeve 4 of an annular structure arranged along the edge of the cabinet body 1 is fixedly provided below the cabinet body 1;

[0031] The isolation step-up transformer body 2 is fixedly arranged in the cabinet 1;

[0032] A supporting rolling mechanism 3 is arranged in a fixed sleeve 4 and is used to support the cabinet 1. The supporting rolling mechanism 3 includes an outer lifting ring 5 arranged below the cabinet 1 and can only be lifted and lowered longitudinally relative to the cabinet 1. Four supporting feet 6 are fixedly connected to the lower end face of the outer lifting ring 5, and the four supporting feet 6 are distributed in a rectangular array; a first guiding mechanism is also provided between the outer lifting ring 5 and the cabinet 1, and the first guiding mechanism includes four guide columns 7 vertically fixedly arranged on the lower end face of the cabinet 1, and the cross-section of the supporting feet 6 is a ring structure, and the four supporting feet 6 correspond one-to-one to the four guide columns 7, and the supporting feet 6 are arranged outside the corresponding guide columns 7; the outer wall of the outer lifting ring 5 fits with the inner wall of the fixed sleeve 4.

[0033] An inner lifting ring 8 is sleeved inside the outer lifting ring 5 and can only be lifted and lowered longitudinally relative to the outer lifting ring 5. A second guiding mechanism is also provided between the outer lifting ring 5 and the inner lifting ring 8. The second guiding mechanism includes four vertical grooves 9 which are arranged on the outer side surface of the inner lifting ring 8 and penetrate the upper and lower end surfaces of the inner lifting ring 8. A plurality of protrusions 10 corresponding to the vertical grooves 9 are fixedly provided on the inner side surface of the outer lifting ring 5. The protrusions 10 are arranged in the corresponding vertical grooves 9 and can only slide longitudinally along the vertical grooves 9. The inner wall of the outer lifting ring 5 is in contact with the outer wall of the inner lifting ring 8. Four wheel seats 11 are fixedly connected to the lower end surface of the inner lifting ring 8, and the four wheel seats 11 are also distributed in a rectangular array. Rollers 12 that can only rotate on their own are installed on the wheel seats 11; two symmetrically distributed first adjustment frames 13 and two symmetrically distributed second adjustment frames 14 are also provided under the cabinet 1, and the symmetry plane between the two first adjustment frames 13 and the symmetry plane between the two second adjustment frames 14 are the same symmetry plane, the four supporting feet 6 are also divided into two groups and symmetrically distributed on both sides of the symmetry plane, and the four wheel seats 11 are also divided into two groups and symmetrically distributed on both sides of the symmetry plane. The first adjustment frame 13 and the second adjustment frame 14 have the same structure. The first adjustment frame 13 includes two sliders 15 slidably arranged at the lower end of the cabinet 1. A fixing rod 16 is fixedly connected between the two first sliders 15, and a screw sleeve 17 is fixedly connected to the fixing rod 16. A first connecting seat 18 is fixedly arranged below the slider 15. A support rod 19 is rotatably connected to the lower end of the first connecting seat 18, and a second connecting seat 20 is rotatably connected to the lower end of the support rod 19. The second connecting seat 20 in the first adjustment frame 13 is fixed to the upper end surface of the outer lifting ring 5, and the four second connecting seats 20 on the outer lifting ring 5 are distributed in a rectangular array. The second connecting seat 20 in the second adjustment frame 14 is fixed to the upper end surface of the inner lifting ring 8, and the four second connecting seats 20 on the inner lifting ring 8 are distributed in a rectangular array; the lower end surface of the cabinet 1 is also provided with a guide groove 21 for slidingly guiding the slider 15, and the slider 15 is slidably arranged in the guide groove 21. The outer lifting ring 5 and the inner lifting ring 8 are both square ring structures. The inner lifting ring 8 is also fixedly connected to a bottom plate 22 that can cover the lower end of the hollow part of the inner lifting ring 8. The bottom plate 22 is fixedly installed on the inner lifting ring 8 by bolts, and a vent hole 23 is provided on the bottom plate 22.

[0034] The driving mechanism 24 can be used to drive the first adjustment frame 13 and the second adjustment frame 14 to work separately, so as to realize the lifting and lowering of the outer lifting ring 5 and the inner lifting ring 8 separately. The driving mechanism 24 includes two driven rods 25 and an active rod 26 located below the cabinet 1. The two driven rods 25 are parallel to each other and can only be installed on the fixed sleeve 4 to rotate. Each driven rod 25 is provided with two sections of external threads 27 with opposite spiral directions. The screw sleeves 17 in the two first adjustment frames 13 are sleeved on one of the driven rods 25, and the two screw sleeves 17 on the driven rod 25 are respectively screwed with the two sections of external threads 27. The two second The screw sleeve 17 in the adjustment frame 14 is sleeved on another driven rod 25, and the two screw sleeves 17 on the driven rod 25 are respectively screwed with two sections of external threads 27, and the driven rod 25 is also fixedly provided with a driven gear 28 coaxially arranged with the driven rod 25; the fixed sleeve 4 is also provided with two sets of locking devices 29 for locking the two driven rods 25, and the locking devices 29 include a ratchet 30 coaxially fixedly connected with the driven rod 25, and the fixed sleeve 4 is also rotatably connected to the outside of the ratchet 31 that cooperates with the ratchet 30, and a spring 32 that presses the ratchet 31 on the ratchet 30 is also fixedly provided between the ratchet 31 and the fixed sleeve 4. A knob 33 is fixedly connected to the ratchet 31.

[0035] The inner side of the fixed sleeve 4 is also fixedly connected to a base 34, on which a first shaft sleeve 35 is provided. The first shaft sleeve 35 and the base 34 are rotatably connected by a rotating shaft 36. The rotating shaft 36 is vertically arranged. The active rod 26 is arranged between the two driven rods 25 and the active rod 26 can only be installed on the first shaft sleeve 35 for self-rotation. The active rod 26 is always perpendicular to the rotating shaft 36. The active rod 26 is also fixedly connected to a driving gear 37 that can mesh with the driven gear 28. The driving gear 37 cannot mesh with two driven gears 28 at the same time. When the driving gear 37 meshes with one of the driven gears 28, it is separated from the other driven gear 28. The fixing sleeve 4 is also provided with a through groove 38 that penetrates the side wall of the fixing sleeve 4, and a fixing seat 39 is fixedly provided on the outer side of the fixing sleeve 4 next to the through groove 38. The fixing seat 39 is provided with an arc groove 40 that is arranged with the rotating shaft 36 as the center, and a second shaft sleeve 41 that can only slide along the arc groove 40 is provided in the arc groove 40. The end of the active rod 26 that is away from the first shaft sleeve 35 passes through the second shaft sleeve 41 and the active rod 26 can only be installed on the second shaft sleeve 41 in rotation. The second shaft sleeve 41 is provided with a positioning hole 42, and the fixing seat 3 Two locking holes 43 are provided on the fixed seat 39. When the second sleeve 41 is fitted with one end of the arc groove 40, the driving gear 37 is meshed with one of the driven gears 28 and the positioning hole 42 is aligned with one of the locking holes 43. When the second sleeve 41 is fitted with the other end of the arc groove 40, the driving gear 37 is meshed with the other driven gear 28 and the positioning hole 42 is aligned with the other locking hole 43. The fixed seat 39 is also provided with a locking member 44 that can simultaneously pass through the mutually aligned positioning holes 42 and locking holes 43. The locking member 44 includes a cylindrical column 45. The column 45 can simultaneously pass through the mutually aligned positioning holes 42 and locking holes 43. A handle 46 is fixedly connected to the upper end of the column 45. A rotating disk 47 fixedly connected to the active rod 26 is also provided outside the fixed seat 39. A handle 48 is fixedly connected to the rotating disk 47.

[0036] The present invention has two use states, one is the moving state, in which the roller 12 is lower than the lower end of the support foot 6 and the lower end of the fixed sleeve 4, and the rolling of the roller 12 can facilitate the movement of the isolation step-up transformer on the bottom surface; the other is the placement state, in which the lower end of the support foot 6 is lower than the roller 12 and the lower end of the fixed sleeve, and the roller does not touch the bottom surface, and the isolation step-up transformer can be stably placed on the bottom surface through the support of the support foot 6. When the present invention is switched from the moving state to the placement state, hold the handle 48 and push the handle 48 to move horizontally to the left, driving the active rod 26 to rotate to the left around the rotating shaft 36 so that the active rod 26 approaches the driven rod 25 connected to the first adjustment frame 13, until the active gear 37 is engaged with the driven gear 28 on the driven rod 25, at which time the second sleeve 41 is in contact with the left end of the arc groove 40, and the positioning hole 42 on the second sleeve 41 is aligned with the locking hole 43 on the left side of the fixed seat 39, and the locking piece is lowered. The first end is inserted into the positioning hole 42 and the locking hole 43, thereby completing the locking of the second sleeve 41, and then the handle 48 is turned clockwise to drive the turntable 47 to rotate, thereby driving the active rod 26 to rotate clockwise, and through the transmission of the active gear 37 and the driven gear 28, the driven rod 25 connected to the first adjustment frame 13 is driven to rotate counterclockwise, thereby driving the screw sleeves 17 on the two first adjustment frames 13 to gradually move away, that is, the sliders 15 on the two first adjustment frames 13 gradually move away, and then through the transmission of the support rod 19, The outer lifting ring 5 is driven to descend until the lower end of the supporting foot 6 on the outer lifting ring 5 is flush with the lower end of the roller 12. At this time, the lower end of the supporting foot 6 is in contact with the ground, and the operator can clearly feel that it takes more force to continue to turn the handle 48 to make the supporting foot 6 continue to move downward relative to the roller 12, so the handle 48 is stopped at this time. During the counterclockwise rotation of the driven rod 25 connected to the first adjustment frame 13, the ratchet 30 in the locking device 29 connected to the driven rod 25 can rotate counterclockwise normally with the driven rod 25.Then, the locking piece is pulled out, and the handle 48 is pushed to drive the active rod 26 to rotate rightward around the rotating shaft 36 until the active gear 37 meshes with the driven gear 28 on the other driven rod 25, and the driven rod 25 is the driven rod 25 connected to the second adjusting frame 14. At this time, the second sleeve 41 fits with the right end of the arc groove 40, and the positioning hole 42 on the second sleeve 41 is aligned with the locking hole 43 on the right side of the fixing seat 39. The lower end of the locking piece is inserted into the positioning hole 42 and the locking hole 43 to complete the locking of the second sleeve 41, and then the pawl 31 on the right side of the locking device 29 is separated from the ratchet 30, and the handle 48 is turned counterclockwise, and the turntable 47 and the active rod 26 also rotate counterclockwise together, and the driven rod 25 connected to the second adjusting frame 14 is driven to rotate clockwise through the transmission of the active gear 37 and the driven gear 28, thereby driving The screw sleeves 17 on the two first adjustment frames 13 are moved gradually closer, that is, the sliders 15 on the two first adjustment frames 13 are gradually closer, and then the inner lifting ring 8 is driven to rise through the transmission of the support rod 19 until the roller 12 on the inner lifting ring 8 is separated from the ground, and the pawl 31 is released. Under the action of the spring 32, the pawl 31 will press against the ratchet 30. Under the action of the friction between the slider 15 and the bottom of the cabinet 1 and the friction between the screw sleeve 17 and the external thread 27 on the driven rod 25, the inner lifting ring 8 equipped with the roller 12 will not fall under the action of gravity, thereby maintaining a state of separation from the ground. The driven rod 25 connected to the first adjustment frame 13 is locked by the locking device 29 on the left. At this time, the driven rod 25 cannot rotate clockwise, so that the relative position between the outer lifting ring 5 and the cabinet 1 can be kept stable. When placed, the isolation step-up transformer is supported by the support legs 6, and has excellent stability when placed. There is no braking mechanism such as a brake, so even if it is placed on an inclined plane, the roller 12 will not roll due to braking problems, and the driven rod 25 connected to the first adjustment frame 13 is locked by the locking device 29 on the left. When the present invention needs to be switched from the placement state to the mobile state, the same operation can be adopted to achieve the height adjustment of the outer lifting ring 5 and the inner lifting ring 8, and finally the present invention is supported by the support legs 6 or the roller 12. During the switching process, the height of the cabinet 1 remains almost unchanged, so it is more labor-saving to operate.

[0037] It should be understood that in the claims and description of the present invention, all "including..." should be understood as an open-ended meaning, that is, its meaning is equivalent to "at least contains...", and should not be understood as a closed meaning, that is, its meaning should not be understood as "only includes...".

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An isolated step-up transformer for testing, characterized in that: include: A cabinet body, a fixing sleeve of an annular structure arranged along the edge of the cabinet body is fixedly provided under the cabinet body; The isolation step-up transformer body is fixedly arranged in the cabinet; A support rolling mechanism is arranged in a fixed sleeve and is used to support the cabinet, the support rolling mechanism includes an outer lifting ring arranged under the cabinet and can only be lifted longitudinally relative to the cabinet, and a plurality of supporting feet are fixedly connected to the lower end surface of the outer lifting ring; an inner lifting ring is provided inside the outer lifting ring, which can only be lifted longitudinally relative to the outer lifting ring, and a plurality of wheel seats are fixedly connected to the lower end surface of the inner lifting ring, and rollers are installed on the wheel seats; two symmetrically distributed first adjustment frames and two symmetrically distributed second adjustment frames are also arranged under the cabinet, the first adjustment frame and the second adjustment frame have the same structure, the first adjustment frame includes two sliders slidably arranged at the lower end of the cabinet, a fixing rod is fixedly connected between the two first sliders, a screw sleeve is fixedly connected to the fixing rod, a first connecting seat is fixedly arranged below the slider, the lower end of the first connecting seat is rotatably connected to the support rod, and the second connecting seat is rotatably connected below the support rod, the second connecting seat in the first adjusting frame is fixed to the upper end surface of the outer lifting ring, and the four second connecting seats on the outer lifting ring are distributed in a rectangular array, and the second connecting seat in the second adjusting frame is fixed to the upper end surface of the inner lifting ring, and the four second connecting seats on the inner lifting ring are distributed in a rectangular array; The driving mechanism can be used to drive the first adjusting frame and the second adjusting frame to work separately, so as to realize the lifting and lowering of the outer lifting ring and the inner lifting ring separately. The driving mechanism comprises two driven rods and an active rod located under the cabinet body, the two driven rods are parallel to each other and can only be rotatably installed on the fixed sleeve, each driven rod is provided with two sections of external threads with opposite spiral directions, the screw sleeves in the two first adjusting frames are sleeved on one of the driven rods, and the two screw sleeves on the driven rod are respectively screwed with the two sections of external threads, the screw sleeves in the two second adjusting frames are sleeved on the other driven rod, and the two screw sleeves on the driven rod are respectively screwed with the two sections of external threads, the driven rod is also fixed with a driven gear coaxially arranged with the driven rod; two sets of locking devices are also provided outside the fixed sleeve, which are respectively used to lock the two driven rods; the inner side of the fixed sleeve is also fixedly connected to the base, and the base is provided with a first shaft sleeve, and the first shaft sleeve and the base are rotatably connected by setting a rotating shaft, the rotating shaft is vertically arranged, and the active rod is arranged The gear train is a gear that is fixedly connected to the drive gear of the vehicle and is used for driving the vehicle body to drive the transmission gear of the vehicle.

2. The test isolation step-up transformer according to claim 1, characterized in that: The locking device comprises a ratchet wheel coaxially fixedly connected to the driven rod, a pawl cooperating with the ratchet wheel is rotatably connected to the outer side of the fixed sleeve, and a spring is fixedly arranged between the pawl and the fixed sleeve to press the pawl on the ratchet wheel.

3. The test isolation step-up transformer according to claim 2, characterized in that: The ratchet pawl is fixedly connected with a knob.

4. The test isolation step-up transformer according to claim 1, characterized in that: There are four supporting feet, which are distributed in a rectangular array; there are four wheel seats, which are also distributed in a rectangular array. The symmetry plane between the two first adjustment frames and the symmetry plane between the two second adjustment frames are the same symmetry plane. The four supporting feet are also divided into two groups and are symmetrically distributed on both sides of the symmetry plane. The four wheel seats are also divided into two groups and are symmetrically distributed on both sides of the symmetry plane.

5. The test isolation step-up transformer according to claim 4, characterized in that: A first guide mechanism is also provided between the outer lifting ring and the cabinet body, and the first guide mechanism includes four guide columns vertically fixedly arranged on the lower end surface of the cabinet body, the cross-section of the supporting feet is a ring structure, the four supporting feet correspond to the four guide columns one by one, and the supporting feet are sleeved outside the corresponding guide columns; the outer wall of the outer lifting ring fits with the inner wall of the fixed sleeve.

6. The test isolation step-up transformer according to claim 1, characterized in that: A second guide mechanism is also provided between the outer lifting ring and the inner lifting ring. The second guide mechanism includes a plurality of vertical grooves which are arranged on the outer side surface of the inner lifting ring and pass through the upper and lower end surfaces of the inner lifting ring. A plurality of protrusions which correspond to the vertical grooves one by one are fixedly provided on the inner side surface of the outer lifting ring. The protrusions are arranged in the corresponding vertical grooves and can only slide longitudinally along the vertical grooves. The inner wall of the outer lifting ring is in contact with the outer wall of the inner lifting ring.

7. The test isolation step-up transformer according to claim 1, characterized in that: The lower end surface of the cabinet is also provided with a guide groove for guiding the sliding block, and the sliding block is slidably arranged in the guide groove.

8. The test isolation step-up transformer according to claim 1, characterized in that: A rotating disk fixedly connected to the active rod is also provided outside the fixing seat, and a handle is fixedly connected to the rotating disk.

9. The test isolation step-up transformer according to claim 1, characterized in that: The outer lifting ring and the inner lifting ring are both square ring structures. The inner lifting ring is also fixedly connected to a bottom plate that can cover the lower end of the hollow part of the inner lifting ring, and a vent hole is provided on the bottom plate.

10. The test isolation step-up transformer according to claim 1, characterized in that: The locking piece comprises a column with a cylindrical structure, and the column can simultaneously pass through a positioning hole and a locking hole that are aligned with each other, and a handle is fixedly connected to the upper end of the column.

Images