Centering positioning device, application and positioning method

Abstract

The invention discloses a centering and positioning device, application and a positioning method, solves the problems that in the prior art, when multiple pieces to be positioned are installed, accurate centering cannot be achieved, and the adjusting efficiency is low, and has the beneficial effects that operation is convenient, and centering adjustment is convenient. The main body supporting frame is provided with connecting components, the connecting components can be clamped with pieces to be positioned, the connecting components correspond to the pieces to be positioned one by one, the main body supporting frame supports the adjusting mechanism and the pair of detection mechanisms, the detection mechanisms are oppositely arranged at the two ends of the main body supporting frame, and the adjusting mechanism is connected with the two detection mechanisms. The detection mechanisms penetrate through the end part of the cross beam, and the adjusting mechanism acts to drive the detection mechanisms to move relative to the main body support frame, so that the two detection mechanisms simultaneously and reversely move to gradually get close to the fixing components on the corresponding sides, and the gaps between the detection mechanisms and the fixing components are conveniently obtained.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation, and in particular to a centering positioning device, application and positioning method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the field of rail transit, there are wheelsets with built-in axle box structures. During the assembly process, axle boxes on both sides are first set, and then wheels on both sides are set outside the axle boxes on both sides. Multiple primary springs need to be installed at the axle box mounting seat, usually two primary springs are set on both sides of the axle box mounting seat. The inventor found that when assembling the primary springs, although the position of the primary springs can be preliminarily positioned at the axle box mounting seat, there are certain difficulties in centering the four primary springs at the axle box mounting seat of the same wheelset. In the prior art, in order to achieve the centering of the four primary springs, it is necessary to measure the distance between the primary springs and the distance between the primary springs and the wheels multiple times, and adjust the installation position of the primary springs on the axle box mounting seat according to the measurement results, so that the primary springs can be preliminarily centered. However, in most cases, the primary springs are only preliminarily installed, and the centering accuracy is low, resulting in the need to repeatedly adjust the installation position of the primary springs later. As a result, the centering installation of the primary springs in the prior art has the problems of low installation accuracy and low installation efficiency.

[0004] Of course, in the prior art, other parts to be positioned, such as a middle part, are provided with multiple parts to be positioned on both sides. These multiple parts to be positioned need to be aligned and positioned at the same time, and there are also the above-mentioned centering and positioning problems. In the prior art, the positioning and centering of most parts to be positioned can only be achieved through repeated manual measurements. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the first object of the present invention is to provide a centering and positioning device that can relatively quickly achieve accurate centering of multiple parts to be positioned.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A centering and positioning device includes a main support frame, which can be hoisted and provided with a connecting member, which can engage with a member to be positioned, and the connecting member corresponds to the member to be positioned one by one. The main support frame supports an adjustment mechanism and a pair of detection mechanisms, and each detection mechanism is arranged at two ends of the main support frame opposite to each other. The adjustment mechanism is connected to the two detection mechanisms respectively, and the detection mechanism is arranged through the end of the beam. The adjustment mechanism is actuated to drive the detection mechanism to move relative to the main support frame, so that the two detection mechanisms move simultaneously and in opposite directions to gradually approach the corresponding side fixing members, so as to obtain the gap between the detection mechanism and the fixing member, and adjust the position of the member to be positioned according to the size of the gap on both sides to realize the centering and positioning of the member to be positioned.

[0008] The centering and positioning device described above, taking into account space limitations and for ease of operation, realizes the reverse movement of the detection mechanisms on both sides by rotating the adjustment mechanism, the adjustment mechanism being connected to the detection mechanism via a transmission mechanism;

[0009] The adjusting mechanism is connected to the transmission mechanism through a gear transmission component. The adjusting mechanism can move up and down while rotating and drive the transmission mechanism to rotate. The transmission mechanism is connected to the detection mechanism. The transmission mechanism drives the detection mechanism to rotate while realizing linear motion. In this way, the adjusting mechanism is rotated, and the transmission mechanism is driven to rotate through the gear transmission component. The detection mechanism is connected to the transmission mechanism to realize the movement of the detection mechanism relative to the main support frame.

[0010] In the centering and positioning device described above, the adjustment mechanism includes an adjustment screw, which rotates relative to the main support frame and moves up and down. The gear transmission component is provided at the bottom of the adjustment screw, and the gear transmission component is connected to the transmission mechanism. The movement of the adjustment screw drives the transmission mechanism and the detection mechanism on both sides to move inward and outward.

[0011] The first screw bearing is arranged in the annular direction of the adjusting screw, the inner ring of the first screw bearing is engaged with the adjusting screw, the outer ring of the first screw bearing is installed on the first bearing seat, the first bearing seat is fixed to the main support frame, and the adjusting screw is rotated relative to the main support frame. Since the first bearing seat is fixed to the main support frame, the adjusting screw can move up and down while rotating.

[0012] In the centering and positioning device described above, the transmission mechanism includes a transmission screw, a limit seat is provided circumferentially around the transmission screw, the limit seat is connected to the main support frame, and the transmission screw is rotatable relative to the limit seat;

[0013] The transmission screw is circumferentially engaged with the inner ring of the second screw bearing, the outer ring of the second screw bearing is installed at the second bearing seat, and the second bearing seat is arranged on both sides of the limit seat, so that the transmission screw can rotate relative to the limit seat, and the transmission screw is connected to the limit seat through the second screw bearing, and the limit seat is connected to the main support frame. The limit seat is restricted in this way, and when the transmission screw rotates, the transmission screw can realize linear motion relative to the limit seat;

[0014] The two transmission mechanisms are symmetrically arranged about the central axis in the width direction of the main body support frame.

[0015] As described above, a centering and positioning device, in order to ensure the coordination between the adjustment mechanism and the transmission mechanism during the movement of the detection mechanism, the gear transmission component includes a first bevel gear fixed to the end of the adjustment screw, and a second bevel gear fixed to the end of the transmission screw. The first gear is respectively engaged with the two second bevel gears, and the two second bevel gears are arranged opposite to each other to drive the corresponding transmission mechanism to rotate respectively.

[0016] As described above, the centering and positioning device comprises a detection mechanism including a measuring rod, which is fixedly connected to the end of the transmission mechanism, a guide seat being circumferentially arranged on the measuring rod, the guide seat being connected to a limit block, the limit block being fixed to the end of the main support frame, and the end of the measuring rod extending beyond the guide seat being connected to the measuring head; the limit block being fixed, the measuring rod realizes linear motion relative to the limit block while rotating under the drive of the transmission mechanism, and the guide seat guiding the movement of the measuring rod.

[0017] The two detection mechanisms are symmetrically arranged about the central axis in the width direction of the main support frame to ensure the accuracy of the alignment of the part to be positioned.

[0018] In the centering and positioning device as described above, the measuring head includes a connecting rod, one end of which is engaged with the measuring rod, and the other end of the connecting rod is provided with a measuring end, which is adapted to the inner side of the wheel rim.

[0019] In the centering and positioning device as described above, the main support frame includes a crossbeam, support columns are respectively provided at both ends of the crossbeam, and the bottom of the support columns is provided with the above-mentioned connecting member;

[0020] In order to ensure a stable connection between the support column and the connecting member, the bottom of the support column is engaged with the connecting member.

[0021] As described above, in a centering and positioning device, the interior of the beam is hollow, a mounting plate is provided on the top of the beam, the mounting plate is detachably connected to the fixing seat, the fixing seat supports the adjustment mechanism, and the adjustment mechanism passes through the opening of the mounting plate into the interior of the beam.

[0022] A lifting ring is provided on the top of the beam, which is used to lift the beam to facilitate quick lifting of the entire beam.

[0023] In the centering and positioning device described above, the support column is arranged obliquely and outwardly relative to the longitudinal center axis of the crossbeam, so that the crossbeam structure is not too large, which is conducive to controlling the weight of the main support frame and ensuring that the distance between two adjacent connecting members is compatible with the distance between the parts to be positioned;

[0024] Along the width direction of the main support frame, the distance between the two support columns at one end of the beam is greater than the width of the beam.

[0025] In the centering and positioning device as described above, the connecting component includes a support block, and a boss is provided at one end of the support block away from the main support frame. The diameter of the boss is adapted to the diameter of the top groove of the part to be positioned so that the boss engages with the part to be positioned.

[0026] In the second aspect, the present invention discloses an application of a centering and positioning device, which is used for the centering and positioning of a primary spring of a built-in axle box in a rail transit vehicle body. The fixing part is a wheel rim, and the centering and positioning of the primary spring is achieved by obtaining the gap between the detection mechanisms on both sides and the inner surface of the top side of the corresponding wheel rim.

[0027] In a third aspect, the present invention further provides a method for centering and positioning a spring of a built-in axle box, using the aforementioned centering and positioning device, including the following contents:

[0028] The bottom of the main support frame is provided with connecting members, the number of which corresponds to the top of the primary spring. The main support frame supports the adjustment mechanism and the detection mechanism. The detection mechanism is provided through the end of the crossbeam and is movable relative to the crossbeam.

[0029] Lift the main support frame, and make the connecting members at the bottom of the main support frame engage with the tops of the primary springs respectively;

[0030] The adjustment mechanism moves to drive the detection mechanism to move relative to the main support frame, so that the two detection mechanisms move simultaneously and in opposite directions to gradually approach the inner side of the wheel rim on the corresponding side, so as to obtain the gap between the detection mechanism and the inner side of the top side of the wheel rim;

[0031] If the gaps between the detection mechanisms on both sides and the inner sides of the corresponding wheel rims are the same, it means that the primary springs are aligned;

[0032] If the gaps on both sides are different, adjust the position of the primary spring on the axle box mounting seat so that the primary spring and the centering positioning device move as a whole to the side with the larger gap, and measure the gap values ​​on both sides again until the gaps on both sides are the same, thereby achieving the purpose of accurately aligning the primary spring relative to the wheels on both sides.

[0033] The beneficial effects of the present invention are as follows:

[0034] 1) The positioning device of the present invention includes a main support frame, which can be hoisted, and a connecting member can be engaged with a member to be positioned, and an adjustment mechanism is connected to two detection mechanisms respectively, and the detection mechanism is arranged through the end of the beam. The adjustment mechanism is actuated to drive the detection mechanism to move relative to the main support frame, so that the two detection mechanisms move simultaneously and in opposite directions to gradually approach the corresponding side fixing members, so as to obtain the gap between the detection mechanism and the corresponding side fixing members, and judge whether the multiple positioning members are centered by the size of the gap on both sides. If the gaps on both sides are the same, it indicates that they are centered. If they are not centered, rapid adjustment can also be achieved. The overall structure can quickly achieve simultaneous adjustment of the centering of multiple members to be positioned, and ensure the accuracy of the centering of multiple members to be positioned.

[0035] 2) In the present invention, taking into account the space limitation and for the convenience of the staff's operation, the adjustment mechanism is set to be rotatable, and the transmission mechanisms on both sides are controlled separately by the gear transmission components. In this way, the adjustment mechanism is rotated, and the transmission mechanism is driven to rotate through the gear transmission components, thereby realizing the movement of the detection mechanism relative to the end of the beam.

[0036] 3) The transmission mechanism structure in the present invention is reasonably arranged, which can not only realize the connection with the main support frame, but also realize the rotation relative to the main support frame, and can be connected to one end of the measuring rod. The transmission mechanism as a whole forms a screw and nut structure, and the limit seat is fixed, so that the transmission screw can drive the measuring rod to rotate and realize linear motion while rotating.

[0037] 4) The adjustment mechanism in the present invention has a reasonable structural arrangement. The adjustment mechanism is installed on the main support frame through a fixed seat. It is detachable relative to the mounting plate, which can realize the connection or disassembly of the adjustment mechanism and the mounting plate, thereby realizing rapid maintenance; the adjustment mechanism as a whole forms a screw and nut structure, and the first bearing seat is limited, so that the adjustment screw can realize up and down movement while rotating.

[0038] 5) The main support frame structure of the present invention is reasonably arranged. The hollow beam can support the adjustment mechanism, transmission mechanism and detection mechanism. The bottom of the support column can be connected to the connecting member to achieve engagement with the part to be positioned.

[0039] 6) When the adjustment mechanism, transmission mechanism and detection mechanism in the present invention are installed on the crossbeam, multiple parts can be quickly assembled, which is conducive to rapid disassembly and assembly. The crossbeam is also provided with a lifting ring to achieve rapid transportation of the whole. The overall structure is reasonably set up, and the crossbeam can be placed on the upper side of the middle component (axle box body) without interfering with the middle component. The up and down rotational motion of the adjustment mechanism can be converted into the rotational motion and linear motion of the transmission mechanism, and then converted into the change of the gap between the detection mechanism and the corresponding side fixed component, such as the inner side of the wheel rim, so that fine adjustment can be achieved as a whole, and the adjustment accuracy is higher.

[0040] 7) The centering method provided by the present invention utilizes the precise position and dimensions of the axle box and the wheel on the wheelset, adopts a symmetrical centering and positioning device, and inserts the connecting component of the centering and positioning device into the top of the corresponding primary spring. By rotating the adjustment mechanism, the transmission mechanism and the detection mechanism are driven to move outward or inward in the horizontal direction, thereby controlling the size of the gap between the detection mechanism and the inner side of the wheel rims on both sides, and appropriately adjusting the position of the primary spring on the axle box to achieve the purpose of accurately aligning the four primary springs relative to the wheels on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0042] Figure 1 is a schematic diagram of a centering and positioning device according to one or more embodiments of the present invention.

[0043] Figure 2 It is a schematic diagram of the internal structure of a centering and positioning device according to one or more embodiments of the present invention.

[0044] Figure 3 It is a schematic diagram of a main body support frame in a centering and positioning device according to one or more embodiments of the present invention.

[0045] Figure 4 Schematic diagram of a connecting member in a centering and positioning device according to one or more embodiments of the present invention.

[0046] Figure 5 It is a schematic diagram of an adjustment mechanism in a centering and positioning device according to one or more embodiments of the present invention.

[0047] Figure 6 It is a schematic diagram of a transmission mechanism in a centering and positioning device according to one or more embodiments of the present invention.

[0048] Figure 7 It is a schematic diagram of a detection mechanism in a centering and positioning device according to one or more embodiments of the present invention.

[0049] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0050] Among them: 1. Main support frame; 2. Connecting member; 3. Adjustment mechanism; 4. Transmission mechanism; 5. Detection mechanism;

[0051] 1-1. Support column, 1-2. Crossbeam, 1-3. Reinforcement rib, 1-4. Fixing seat, 1-5. Lifting ring, 1-6. Mounting plate;

[0052] 2-1. Support block, 2-2. Boss;

[0053] 3-1. Adjusting screw, 3-2. Rotating handle, 3-3. First bearing seat, 3-4. First screw bearing, 3-5. First bevel gear;

[0054] 4-1. Drive screw, 4-2. Second bearing seat, 4-3. Second screw bearing, 4-4. Limit seat, 4-5. Second bevel gear;

[0055] 5-1. Measuring rod, 5-2. Guide seat, 5-3. Limit block, 5-4. Measuring head;

[0056] 5-41. Measuring tip, 5-42. Connecting rod. DETAILED DESCRIPTION

[0057] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[0059] As introduced in the background technology, in the prior art, for wheelsets with built-in axle box structures, multiple primary springs installed at the axle box mounting seat cannot be centered and adjusted, resulting in low efficiency. In order to solve the above technical problems, the present invention proposes a centering and positioning device.

[0060] Example 1

[0061] In a typical embodiment of the present invention, referring to Figure 1 、 Figure 2As shown, a centering and positioning device includes a main support frame 1, the main support frame 1, the main support frame can be hoisted, the main support frame is provided with a connecting member 2, the connecting member 2 can be engaged with the top of the part to be positioned, the connecting member corresponds to the part to be positioned one by one, the main support frame 1 supports an adjustment mechanism, a pair of transmission mechanisms and a pair of detection mechanisms, each detection mechanism 4 is arranged at the two ends of the main support frame in opposite directions, the adjustment mechanism 3 is connected to the two transmission mechanisms, and the two transmission mechanisms are connected to the corresponding detection mechanisms, and the detection mechanism is arranged through the end of the beam, and the adjustment mechanism is actuated to drive the transmission mechanism and the detection mechanism to move relative to the main support frame, so that the two detection mechanisms move simultaneously and in opposite directions to gradually approach the corresponding side fixing members, so as to obtain the gap between the detection mechanism and the fixing member.

[0062] In this embodiment, the part to be positioned is an internal axle box primary spring, and the fixed component is the wheel rim. Since the position and dimensions of the axle box and the wheel on the wheelset are fixed and the dimensions are relatively precise, a symmetrical centering positioning device is used.

[0063] Taking into account the space limitation and for the convenience of operation, the transmission mechanism and the detection mechanism on both sides are moved in opposite directions by rotating the adjustment mechanism, and the adjustment mechanism is connected to the detection mechanism through the transmission mechanism;

[0064] In this embodiment, the adjustment mechanism is connected to the transmission mechanism through a gear transmission component. The adjustment mechanism can move up and down while rotating and drive the transmission mechanism to rotate. The transmission mechanism is connected to the detection mechanism. The transmission mechanism drives the detection mechanism to rotate while realizing linear motion. In this way, the adjustment mechanism is rotated, and the transmission mechanism is driven to rotate through the gear transmission component. The detection mechanism is connected to the transmission mechanism to realize the movement of the detection mechanism relative to the main support frame.

[0065] Among them, the main support frame 1 is the main body of the positioning device, which is used to connect and fix 4 sets of connecting components 2, 1 set of adjustment mechanism 3, 2 sets of transmission mechanism 4 and 2 sets of detection mechanism 5.

[0066] refer to Figure 3 As shown, the main support frame 1 includes a support column 1-1, a crossbeam 1-2, a reinforcing rib 1-3, a fixing seat 1-4, a lifting ring 1-5, and a mounting plate 1-6. The crossbeam has a long length, and two support columns 1-1 are respectively set at both ends of the crossbeam. Considering that the crossbeam needs to be set above the axle box body, the support columns need to be connected with the connecting member. The connecting member cooperates with a series of springs. The series of springs are set below the top of the axle box body. The bottom of the support column is set below the crossbeam to avoid interference between the crossbeam and the axle box body. The support column is tilted outward relative to the crossbeam. The two support columns on the end side of the crossbeam are arranged in an eight-shaped shape. The bottom ends of the support columns are respectively connected to the corresponding connecting members 2. The four connecting members are located in the same plane. The connecting members play a connecting and positioning role. The support column 1-1 is set on the side of the crossbeam and connected to the crossbeam 1-2.

[0067] It is easy to understand that the longitudinal cross-section of the middle section of the crossbeam 1-2 is U-shaped, and the top of the crossbeam is provided with a fixing seat 1-4 of the adjustment mechanism 3, which plays the role of fixing the adjustment structure 3 and is also a tool maintenance port;

[0068] Specifically, the fixing seat 1-4 is door-shaped, and an opening is set at the top of the door-shaped fixing seat for the adjustment mechanism 3 to pass through. The inside of the fixing seat is fixedly connected to the bearing seat of the adjustment mechanism 3. A mounting plate is fixed on the top of the beam. The width of the mounting plate 1-6 is greater than the width of the hollow part of the beam so that the mounting plate can be fixed to the top of the beam. The width of the mounting plate is smaller than the span of the door-shaped fixing seat. The door-shaped fixing seat and the mounting plate are detachably connected to each other, thereby achieving the fixation of the fixing seat. The mounting plate is set with an opening for the adjustment mechanism to pass through and cooperate with the transmission mechanism. When maintenance is required, the bolts between the fixing seat 1-4 and the mounting plate 1-6 are removed, and the fixing seat 1-4 and the adjustment mechanism 3 can be removed as a whole, and the internal structure of the beam can be observed from the top.

[0069] Taking the overall installation into consideration, the transmission mechanism and the detection mechanism are first installed in the hollow part of the beam, and a mounting plate is set on the top of the beam. The mounting plate is connected to the limit seat of the transmission mechanism, and the adjustment mechanism is installed through the fixed seat. Finally, the fixed seat is connected to the mounting plate, a hole is opened in the middle of the mounting plate 1-6, and the mounting plate is connected to the side of the fixed seat.

[0070] Among them, reinforcing ribs 1-3 are provided between the two supporting columns on the end side of the beam and between the supporting column 1-1 and the beam 1-2. The reinforcing ribs 1-3 can be reinforcing plates;

[0071] In addition, multiple lifting rings such as two lifting rings 1-5 are provided on the upper part of the beam 1-2. The lifting rings 1-5 are provided on both sides of the mounting plate. A top plate is fixed on the top of the beam at the position where the lifting ring is provided, which is used for the overall lifting of the tooling. The lifting rings are located on both sides of the disassembly fixing seat.

[0072] refer to Figure 4 As shown, the connecting member 2 is engaged with the bottom end of the support column. In this embodiment, a convex portion is provided on the upper surface of the connecting member, and a concave portion is provided at the bottom of the support column. The convex portion and the concave portion are engaged with each other, and the central axis of the support column coincides with the central axis of the connecting member.

[0073] Specifically, the connecting member 2 includes a support block 2-1, the cross-section of the support block is circular, and a boss 2-2 is provided on the lower surface of the support block 2-1. The diameter of the boss is smaller than the inner diameter of the groove of the primary spring (the primary spring includes a spring, a metal seat is provided on the top of the spring, and the metal seat is provided with a groove). The diameter of the boss 2-2 is adapted to the inner diameter of the groove of the primary spring, so that the boss can be stuck into the top of the primary spring, and a positioning step is formed between the peripheral side of the boss and the support block to cooperate with the top of the primary spring; in addition, the boss can choose a conical structure to facilitate the rapid installation of the connecting member, and the boss and the groove at the top of the primary spring are matched with a clearance fit, so that the primary spring is accurately positioned through the connecting member.

[0074] refer to Figure 5 As shown, the adjustment mechanism 3 includes an adjustment screw 3-1, a rotating handle 3-2, a first bearing seat 3-3, a first screw bearing 3-4, and a first bevel gear 3-5. The adjustment mechanism connects the upper rotating handle 3-2, the two sets of first screw bearings 3-4 in the middle, and the lower first bevel gear 3-5 into a whole through the adjustment screw 3-1; the inner rings of the two sets of first screw bearings 3-4 are embedded in the adjustment screw 3-1, the two sets of first screw bearings are set at a distance, and the outer rings of the two sets of first screw bearings 3-4 are installed on the upper and lower two sets of first bearing seats 3-3 On the upper part, the two first bearing seats 3-3 are respectively fixed at the fixed seats 1-4 of the main support frame 1, and the screw bearings 3-4 play a guiding and positioning role for the adjusting screw 3-1. The adjusting screw forms a screw nut structure as a whole. When working, the handle 3-2 is rotated clockwise or counterclockwise. Since the first bearing seat is fixedly connected to the fixed seat, the adjusting screw can move up and down while rotating, driving the connected adjusting screw 3-1 and the lower first bevel gear 3-5 to rotate, thereby driving the transmission mechanism to rotate, and finally driving the detection mechanism to move linearly relative to the beam.

[0075] It is easy to understand that the rotating handle 3-2 is a ring-shaped part, and the rotating handle is provided with an operating rod to facilitate the rotation of the rotating handle.

[0076] It should be explained that the interior of the beam 1-2 is hollow, and a transmission mechanism is set inside the beam. There are two sets of transmission mechanisms, and the two sets of transmission mechanisms are symmetrically arranged about the center line of the width direction of the beam. Figure 6As shown, the two sets of transmission mechanisms 4 are respectively coordinated with the corresponding adjustment mechanisms 3, and the transmission mechanism includes a transmission screw 4-1. The central axes of the transmission screws on both sides are coaxially arranged. Each transmission screw 4-1 connects the second bearing seat 4-2, the second screw bearing 4-3, the limit seat 4-4, and the second bevel gear 4-5 on the same side. Each transmission screw 4-1 is embedded with the inner rings of the two sets of second screw bearings 4-3 on the same side. The second screw bearings 4-3 guide and position the transmission screw 4-1. The outer rings of the two sets of second screw bearings 4-3 are installed on the two sets of second bearing seats 4-2 on the left and right of the limit seat 4-4. The limit seat 4-4 is installed on the mounting plate of the main support frame beam 1-2. A second bevel gear 4-5 is installed at one end of each transmission screw 4-1 close to the adjustment mechanism, and the two second bevel gears 4-5 are simultaneously engaged with the first bevel gear 3-5 of the adjustment mechanism 3;

[0077] It should be noted that the first bevel gear and the second bevel gear constitute a gear transmission component.

[0078] In this embodiment, the longitudinal cross-section of the limit seat 4-4 is T-shaped, and a flat plate is set on the top of the limit seat. The flat plate is used to be fixedly connected to the mounting plate. The flat plate is connected to the connecting section, and the connecting section is sleeved on the annular direction of the transmission screw. The second bearing seat 4-2 fixedly connected to it is respectively set on both sides of the limit seat connecting section.

[0079] The transmission mechanism forms a screw-nut structure. When working, when the first bevel gear 3-5 of the adjustment mechanism 3 rotates downward, it drives the second bevel gears 4-5 on both sides of the transmission mechanism 4 to rotate outward. Because the limit seat is fixed, the transmission screw can move while rotating, thereby driving the detection mechanism 5 to move outward. Conversely, when the first bevel gear 3-5 of the adjustment mechanism 3 rotates upward, it drives the second bevel gears 4-5 on both sides of the transmission mechanism 4 to rotate inward, thereby driving the detection mechanism 5 to move inward.

[0080] refer to Figure 7 As shown, the detection mechanism 5 includes a measuring rod 5-1, a guide seat 5-2, a limit block 5-3 and a measuring head 5-4. Each measuring rod 5-1 connects the components on the same side, namely the guide seat 5-2, the limit block 5-3 and the measuring head 5-4. One end of the measuring rod 5-1 is connected to the transmission screw 4-1 of the transmission mechanism 4. The measuring rod and the transmission screw are coaxially arranged. The guide seat 5-2 is sleeved on the measuring rod 5-1. The measuring rod 5-1 and the guide seat 5-2 are clearance-fitted so that the measuring rod is fixedly connected to the end of the transmission mechanism. The guide seat 5-2 is installed on the limit block 5-3. The limit block 5-3 is installed at the end of the crossbeam 1-2 of the main support frame. The guide seat 5-2 guides and positions the measuring rod 5-1. The measuring head 5-4 is provided at the end of the measuring rod away from the transmission screw 4-1.

[0081] Specifically, the transmission screw and the measuring rod can be connected by snapping, or a threaded hole is provided at the end of the transmission screw, and an external thread is provided at one end of the measuring rod. In this way, the measuring rod is also a screw. In this way, when the transmission screw rotates, the transmission screw rotates and moves, which drives the measuring rod to rotate and move.

[0082] Among them, the longitudinal cross-section of the guide seat is T-shaped, and the guide seat includes a guide sleeve, an end plate is set at one end of the guide sleeve, the limit block 5-3 is circumferentially sleeved on the guide sleeve and fixedly connected to the end plate, and a baffle is set on the outside of the limit block at the end of the beam. The baffle is used to limit the limit block, and the baffle can be fixedly connected to the limit block so that the limit block is fixed to the end of the beam.

[0083] It needs to be explained that the end of the measuring rod away from the transmission screw is engaged with the measuring head, and the measuring head includes a connecting rod 5-42. A groove is set at the end of the measuring rod away from the transmission screw. One end of the connecting rod can be inserted into the groove of the measuring rod. A measuring end 5-41 is set at the other end of the connecting rod. The diameter of the measuring end 5-41 is larger than the diameter of the connecting rod. The measuring end has a set thickness, and the measuring end is adapted to the inner side of the wheel rim.

[0084] In addition, a stage is provided on the end side where the connecting rod is inserted into the measuring rod, so that the connecting rod can be easily inserted into the groove of the measuring rod and limited.

[0085] During operation, the transmission screw 4-1 of the transmission mechanism 4 rotates and moves outward, driving the detection mechanism 5 to move outward until the measuring head 5-4 is close to the inner side of the wheel rim on the same side. Conversely, the transmission screw 4-1 of the transmission mechanism 4 rotates and moves inward, driving the detection mechanism 5 to move inward, and at this time the measuring head 5-4 is away from the inner side of the wheel rim on the same side.

[0086] It is easy to understand that in other examples, the part to be positioned can also be other parts to be positioned, and the corresponding side fixing component can also be other components. As long as the dimensions between the device where the part to be positioned is located and the fixing component are precise, the device can be used to achieve centering positioning of multiple parts to be positioned in the same device.

[0087] Example 3

[0088] This embodiment discloses a method for centering and positioning a spring in a built-in axle box, using a centering and positioning device as described in the first embodiment, including the following contents:

[0089] The bottom of the main support frame is provided with connecting members, and the number of the connecting members corresponds one to one with the top of the primary spring. The main support frame supports the adjustment mechanism, the transmission mechanism and the detection mechanism. The first bevel gear of the adjustment mechanism is engaged with the second bevel gear of the transmission mechanism. The detection mechanism is provided through the end of the crossbeam and is movable relative to the crossbeam.

[0090] Place the four primary springs on the mounting seat of the axle box;

[0091] Lift the main support frame, place the crossbeam above the axle box, and make the connecting members at the bottom of the main support frame engage with the tops of the primary springs respectively, that is, the bosses of the four connecting members are respectively engaged with the tops of the corresponding four primary springs;

[0092] The adjustment mechanism is manually rotated, and the adjustment mechanism moves downward during the rotation process, driving the transmission mechanism to rotate and move outward, so that the detection mechanism gradually approaches the inner side of the wheel rim on the corresponding side, and the existing seam gauge is used to detect the gap between the detection mechanism and the inner side of the wheel rim. If the gaps on both sides are the same, the primary spring has been centered. If the gaps on both sides are different, it is necessary to slightly adjust the position of the primary spring on the axle box mounting seat to move the primary spring and the centering positioning device as a whole to the side with the larger gap, and measure the gap values ​​on both sides again until the gaps on both sides are the same, thereby achieving the purpose of accurately aligning the four primary springs relative to the wheels on both sides.

[0093] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A centering and positioning device, characterized in that: The invention comprises a main body support frame, which can be hoisted, and is provided with a connecting member, which can be engaged with a piece to be positioned, and the connecting member corresponds to the piece to be positioned one by one, and the main body support frame supports an adjustment mechanism and a pair of detection mechanisms, and each detection mechanism is arranged at two ends of the main body support frame opposite to each other, and the adjustment mechanism is connected to the two detection mechanisms respectively, and the detection mechanism is arranged through the end of the crossbeam, and the adjustment mechanism is actuated to drive the detection mechanism to move relative to the main body support frame, so that the two detection mechanisms move simultaneously and in opposite directions to gradually approach the corresponding side fixing members, so as to obtain the gap between the detection mechanism and the fixing member, and adjust the position of the piece to be positioned according to the size of the gap on both sides to realize the centering and positioning of the piece to be positioned.

2. A centering and positioning device according to claim 1, characterized in that: The adjustment mechanism is connected to the detection mechanism via a transmission mechanism; The adjustment mechanism is connected to the transmission mechanism through a gear transmission component. The adjustment mechanism can move up and down while rotating and drive the transmission mechanism to rotate. The transmission mechanism is connected to the detection mechanism, and the transmission mechanism drives the detection mechanism to rotate while achieving linear motion.

3. A centering and positioning device according to claim 2, characterized in that: The adjustment mechanism includes an adjustment screw, which rotates relative to the main support frame and moves up and down at the same time, and the gear transmission component is arranged at the bottom of the adjustment screw, and the gear transmission component is connected to the transmission mechanism; The first screw bearing is circumferentially arranged on the adjusting screw, the inner ring of the first screw bearing is engaged with the adjusting screw, the outer ring of the first screw bearing is installed on the first bearing seat, and the first bearing seat is fixed on the main body support frame.

4. A centering and positioning device according to claim 2, characterized in that: The transmission mechanism comprises a transmission screw, a limit seat is arranged in the ring direction of the transmission screw, the limit seat is connected to the main support frame, and the transmission screw can rotate relative to the limit seat; The transmission screw is circumferentially engaged with the inner ring of the second screw bearing, the outer ring of the second screw bearing is installed at the second bearing seat, and the second bearing seat is arranged on both sides of the limit seat, so that the transmission screw can rotate relative to the limit seat; The two transmission mechanisms are symmetrically arranged about the central axis in the width direction of the main body support frame.

5. A centering and positioning device according to claim 3, characterized in that: The gear transmission component comprises a first bevel gear fixed to the end of the adjusting screw and a second bevel gear fixed to the end of the driving screw, and the first gear is meshed with two second bevel gears respectively.

6. A centering and positioning device according to claim 2, characterized in that: The detection mechanism includes a measuring rod, which is fixedly connected to the end of the transmission mechanism, a guide seat is arranged in an annular direction of the measuring rod, the guide seat is connected to a limit block, the limit block is fixed to the end of the main support frame, and the end of the measuring rod beyond the guide seat is connected to the measuring head; The two detection mechanisms are symmetrically arranged about the central axis in the width direction of the main body support frame.

7. A centering and positioning device according to claim 6, characterized in that: The measuring head comprises a connecting rod, one end of which is snap-connected with the measuring rod, and the other end of the connecting rod is provided with a measuring end head, which is matched with the inner side of the wheel rim.

8. A centering and positioning device according to claim 1, characterized in that: The main support frame includes a crossbeam, and support columns are respectively arranged at both ends of the crossbeam, and the bottom of the support column is provided with the connecting member; The bottom of the support column is snap-connected with the connecting component.

9. A centering and positioning device according to claim 8, characterized in that: The interior of the crossbeam is hollow, a mounting plate is disposed on the top of the crossbeam, the mounting plate is detachably connected to the fixing seat, the fixing seat supports the adjustment mechanism, and the adjustment mechanism passes through the opening of the mounting plate into the interior of the crossbeam; A lifting ring is provided on the top of the beam.

10. A centering and positioning device according to claim 8, characterized in that: The support column is arranged obliquely outward relative to the longitudinal center axis of the crossbeam; Along the width direction of the main support frame, the distance between the two support columns at one end of the crossbeam is greater than the width of the crossbeam.

11. A centering and positioning device according to claim 1, characterized in that: The connecting member comprises a supporting block, and a boss is arranged at one end of the supporting block away from the main supporting frame, and the diameter of the boss is matched with the diameter of the top groove of the part to be positioned so that the boss is engaged with the part to be positioned.

12. Application of a centering and positioning device according to any one of claims 1 to 11, characterized in that: The invention is applied to the centering positioning of the primary spring of the built-in axle box in the rail transit vehicle body. The fixing part is the wheel rim. The centering positioning of the primary spring is achieved by obtaining the gap between the detection mechanisms on both sides and the inner side surface of the top side of the wheel rim on the corresponding side.

13. A method for centering and positioning a series of springs in a built-in axle box, characterized in that: A centering and positioning device according to any one of claims 1 to 11, comprising the following contents: The bottom of the main support frame is provided with a connecting member, the number of which corresponds to the top of the primary spring, and the main support frame supports the adjustment mechanism and the detection mechanism, the detection mechanism is arranged through the end of the crossbeam and the detection mechanism is movable relative to the crossbeam; Lift the main body support frame, and make the connecting components at the bottom of the main body support frame engage with the tops of the primary springs respectively; The adjustment mechanism moves to drive the detection mechanism to move relative to the main support frame, so that the two detection mechanisms move simultaneously and in opposite directions to gradually approach the inner side of the wheel rim on the corresponding side, so as to obtain the gap between the detection mechanism and the inner side of the top side of the wheel rim; If the gaps between the detection mechanisms on both sides and the corresponding inner sides of the wheel rims are the same, it means that the primary springs have been centered; If the gaps on both sides are different, adjust the position of the primary spring on the axle box mounting seat to move the primary spring and the centering positioning device as a whole to the side with larger gap, and measure the gap values ​​on both sides again until the gaps on both sides are the same, thereby achieving the purpose of accurate centering of the primary spring relative to the wheels on both sides.

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