Assembly tool for bridging chassis

Abstract

The utility model relates to the technical field of chassis assembly tools, and discloses a bridging chassis assembly tool which comprises two longitudinal beams and a plurality of cross beams, the two longitudinal beams are arranged in parallel, the two ends of each cross beam are connected with the two longitudinal beams respectively, and supporting and tightening devices are arranged on the cross beams. And each longitudinal beam is at least provided with a side jacking device and a lower pressing device. According to the bridging underframe assembly tool, the tool is provided with a vertical supporting structure, a downward pressing structure and a lateral jacking structure, the bridging structure is in a step shape, assembly of an arch bridging underframe structure is met, deflection manufacturing of an arch bridging type structure underframe assembly is achieved, an arch bridging structure underframe can be efficiently assembled and welded, and the production efficiency of the arch bridging type structure underframe assembly is improved. And the overall dimension and bus deflection requirements of the whole chassis can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of underframe assembly tools, and particularly relates to a cross-underframe assembly tool. Background Technique

[0002] The underframe assembly of the subway belongs to the basic components in the entire aluminum alloy car body. It is located at the bottom of the entire car body and is the main load-bearing component of the entire car body. In the past, the structure of the aluminum alloy car body underframe was usually a through-length bottom plate structure, while the arched cross-connection structure, as Figure 1 shown, the left and right side beams (1-2, 1-7) are cross-connected above the end floor one (1-1) and the end floor two (1-4). The middle part is inserted by the bolster assembly (1-6) and the connecting plates (1-3, 1-5). Among them, the connecting plates are connected to the end floors, and the bolsters are connected to the side beams, forming an overall arched cross-connection structure of the underframe assembly.

[0003] The existing underframe assembly tools cannot meet the assembly of the arched cross-connection structure. When assembling the cross-underframe with the existing assembly tools, if the side beams are assembled first, the end floors at both ends cannot be put into the fixture. The end floors are under the side beams. If the end floors at both ends are assembled first, this way of putting the fixture into the tire cannot be realized; and the internal fixture positioning of the side beams cannot assemble the structures on non-concentric surfaces. After the bolster is connected to the side beam, a closed structure is formed, and there is no space for applying the internal fixture positioning. At the same time, the existing assembly tools cannot meet the longitudinal deflection requirements of the underframe. Summary of the Invention

[0004] In order to solve the problem that the existing assembly tools cannot meet the assembly of the arched cross-underframe structure, the utility model provides a cross-underframe assembly tool.

[0005] The technical solution of the utility model is as follows:

[0006] The utility model provides a cross-underframe assembly tool, which includes: two longitudinal beams and several cross beams. The two longitudinal beams are arranged in parallel, and both ends of the several cross beams are respectively connected to the two longitudinal beams. Jacking devices are arranged on all the cross beams, and at least one set of side jacking devices and lower pressing devices are arranged on each longitudinal beam.

[0007] Further, there are 5 groups of cross beams. The cross beams are arranged on the longitudinal beams from left to right as the first cross beam, the second cross beam, the third cross beam, the fourth cross beam and the fifth cross beam. 3 groups of jacking devices are arranged on each of the first cross beam, the second cross beam, the third cross beam, the fourth cross beam and the fifth cross beam.

[0008] Further, the two longitudinal beams are a first longitudinal beam and a second longitudinal beam. The side pressing device includes a first side pressing device. A first side pressing device is provided on one side of the connection between the first cross beam, the second cross beam, the fourth cross beam and the fifth cross beam and the first longitudinal beam. A first side pressing device is provided on one side of the first cross beam, the second cross beam and the fifth cross beam close to the second longitudinal beam.

[0009] Further, a lower pressing device is provided on one side of the connection between the fourth cross beam and the first longitudinal beam. A lower pressing device is provided on one side of the connection between the fourth cross beam, the fifth cross beam and the second longitudinal beam.

[0010] Further, the three sets of supporting and pressing devices on the third cross beam can be replaced by a pair of bolster center positioning devices and one set of supporting and pressing devices. The bolster center positioning devices are respectively arranged on both sides of the third cross beam, and the supporting and pressing device is arranged at the middle position of the third cross beam.

[0011] Further, the side pressing device further includes a second side pressing device. A second side pressing device is provided on one side of the connection between both ends of the third cross beam and the longitudinal beam.

[0012] Further, the first side pressing device includes a fixed base and a cantilever module arranged on the fixed base. The second side pressing device includes a fixed base, a cantilever module arranged on the fixed base and a heightening aluminum plate. The heightening aluminum plate connects the fixed base and the cantilever module.

[0013] Further, a center line suspension device is further included. The center line suspension device includes a pair, which are respectively arranged at both ends of the longitudinal beam.

[0014] Further, the lower pressing device includes a cantilever unit and a screw rod arranged at the end of the cantilever unit. The screw rod can move up and down along the vertical direction.

[0015] The beneficial effects of the present utility model at least include: Through the bridging chassis assembly tooling provided by the present utility model, the tooling is provided with vertical supporting, downward pressing and lateral pressing structures. Its bridging structure is in a stepped shape, which not only meets the assembly of the arched bridging chassis structure, but also realizes the deflection production of the chassis composed of the arched bridging structure. It can efficiently assemble and weld the arched bridging structure chassis, and can also ensure the overall chassis external dimension and the bus deflection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the prior art arched bridging chassis structure provided by the present utility model.

[0017] Figure 2 It is a schematic diagram of Embodiment 1 provided by the present utility model.

[0018] Figure 3 Schematic diagram of the first side pressing device in Embodiment 1 provided by the present utility model.

[0019] Figure 4 Schematic diagram of the lower pressing device in Embodiment 1 provided by the present utility model.

[0020] Figure 5 Schematic diagram of the supporting pressing device in Embodiment 1 provided by the present utility model.

[0021] Figure 6 Schematic diagram of Embodiment 2 provided by the present utility model.

[0022] Figure 7 Schematic diagram of the bolster center positioning device in Embodiment 2 provided by the present utility model.

[0023] Figure 8 Schematic diagram of the center line suspension device in Embodiment 2 provided by the present utility model.

[0024] Figure 9 Schematic diagram of the longitudinal beam provided by the present utility model.

[0025] Figure 10 Schematic diagram of the cross beam provided by the present utility model.

[0026] Wherein:

[0027] 1 - longitudinal beam; 101 - first longitudinal beam; 102 - second longitudinal beam;

[0028] 2 - cross beam; 201 - first cross beam; 202 - second cross beam; 203 - third cross beam; 204 - fourth cross beam; 205 - fifth cross beam;

[0029] 3 - supporting pressing device;

[0030] 4 - side pressing device; 401 - first side pressing device; 402 - second side pressing device; 403 - fixed base; 404 - cantilever module;

[0031] 5 - lower pressing device;

[0032] 6 - bolster center positioning device;

[0033] 7 - center line suspension device. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] The utility model provides a bridging chassis assembly tooling, including: two longitudinal beams 1 and several cross beams 2. The two longitudinal beams 1 are arranged in parallel. The two ends of several cross beams 2 are respectively connected to the two longitudinal beams 1. The cross beam 2 can be locked to the longitudinal beam 1 by bolts. A support tightening device 3 is arranged on each cross beam 2. At least one set of side tightening devices 4 and lower pressing devices 5 are arranged on each longitudinal beam 1. The support tightening device 3 can be locked on the cross beam 2 by bolts.

[0036] Embodiment 1

[0037] Combined Figure 2 、 Figure 9 And Figure 10 As shown, this embodiment provides a reverse-mounted resistance welding tooling for a bridging chassis, including: a first longitudinal beam 101, a second longitudinal beam 102 arranged in parallel, and a first cross beam 201, a second cross beam 202, a third cross beam 203, a fourth cross beam 204, and a fifth cross beam 205 whose two ends are respectively connected to the first longitudinal beam 101 and the second longitudinal beam 102. The first cross beam 201, the second cross beam 202, the third cross beam 203, the fourth cross beam 204, and the fifth cross beam 205 are respectively arranged on the first longitudinal beam 101 and the second longitudinal beam 102 from left to right. Three sets of support tightening devices 3 are arranged on each of the first cross beam 201, the second cross beam 202, the third cross beam 203, the fourth cross beam 204, and the fifth cross beam 205. As Figure 5 shown, the positions of the three sets of support tightening devices 3 on each cross beam 2 are the same. The support tightening device 3 is made of Q235 carbon steel, and the contact surface with the workpiece is made of aluminum. It is connected to the cross beam 2 by bolts and bears the main supporting force.

[0038] Multiple sets of side tightening devices 4 are arranged on each of the first longitudinal beam 101 and the second longitudinal beam 102. The side tightening device 4 is a first side tightening device 401. As Figure 3As shown in the figure, there are 4 sets of side tightening devices 4 arranged on the first longitudinal beam 101. The 4 sets of side tightening devices 4 are respectively arranged on one side close to the first cross beam 201, the second cross beam 202, the fourth cross beam 204, and the fifth cross beam 205. The first side tightening devices 401 arranged on the sides of the first cross beam 201 and the second cross beam 202 are respectively arranged on the first longitudinal beam 101 on the side far from the second cross beam 202 and the first cross beam 201. The first side tightening devices 401 arranged on the sides of the fourth cross beam 204 and the fifth cross beam 205 are respectively arranged on the first longitudinal beam 101 on the side far from the fifth cross beam 205 and the fourth cross beam 204. There are 3 sets of side tightening devices 4 arranged on the second longitudinal beam 102. The 3 sets of side tightening devices 4 are respectively arranged on one side close to the first cross beam 201, the second cross beam 202, and the fifth cross beam 205. The first side tightening devices 401 arranged on the sides of the first cross beam 201 and the second cross beam 202 are respectively arranged on the second longitudinal beam 102 on the side far from the second cross beam 202 and the first cross beam 201. The first side tightening device 401 arranged on the side of the fifth cross beam 205 is arranged on the second longitudinal beam 102 on the side far from the fourth cross beam 204.

[0039] There is also at least one set of lower pressing device 5 arranged on both the first longitudinal beam 101 and the second longitudinal beam 102. As Figure 4 shown in the figure, there is one set of lower pressing device 5 arranged on the first longitudinal beam 101. The one set of lower pressing device 5 is arranged on the first longitudinal beam 101 between the third cross beam 203 and the fourth cross beam 204. The first side tightening device 401 arranged close to the fourth cross beam 204 is located between the fourth cross beam 204 and the lower pressing device 5. There are two sets of lower pressing devices 5 arranged on the second longitudinal beam 102. The two sets of lower pressing devices 5 are respectively arranged on the second longitudinal beam 102 between the third cross beam 203 and the fourth cross beam 204, and between the fourth cross beam 204 and the fifth cross beam 205.

[0040] The first side tightening device 401 includes a fixed base 403 and a cantilever module 404 arranged on the fixed base 403. The first side tightening device 401 is made of Q235 carbon steel. The cantilever module 404 is vertically arranged downward. When using the tooling, it bears the main lateral tightening force and pressing force. The lower pressing device 5 includes a cantilever unit and a screw rod arranged at the end of the cantilever unit. The screw rod can move up and down along the vertical direction. The contact part of the screw rod and the workpiece is a circular cylinder, forming a cantilever modular structure. It is made of Q235 carbon steel. When using the tooling, it bears the main pressing force.

[0041] The first longitudinal beam 101 and the second longitudinal beam 102 are of I-shaped structure and made of Q235 carbon steel. The first cross beam 201, the second cross beam 202, the third cross beam 203, the fourth cross beam 204 and the fifth cross beam 205 are all of I-shaped structure. The two longitudinal beams 1 and the five cross beams 2 form the main structure of the chassis tooling. The cross beams are made of Q235 carbon steel, and the longitudinal beams and the cross beams bear the main pressing force during resistance welding.

[0042] Embodiment 2

[0043] As Figure 6 shown, this embodiment provides a cross-joint chassis right-side-up resistance welding tooling, which includes the cross-joint chassis upside-down resistance welding tooling structure provided in the above Embodiment 1, and further includes:

[0044] The second side pressing device 402, and there are 2 groups of the second side pressing devices 402. The 2 groups of the second side pressing devices 402 are respectively arranged on the first longitudinal beam 101 and the second longitudinal beam 102. The second side pressing devices 402 arranged on the first longitudinal beam 101 and the second longitudinal beam 102 are both located between the third cross beam 203 and the lower pressing device 5. The second side pressing device 402 includes a fixed base 403, a cantilever module 404 and a heightening aluminum plate arranged on the fixed base 403. The heightening aluminum plate connects the fixed base 403 and the cantilever module 404;

[0045] 2 groups of bolster center positioning devices 6, as Figure 7 shown, replace the 3 groups of supporting pressing devices 3 on the third cross beam 203 with 2 groups of bolster center positioning devices 6 and 1 group of supporting pressing device 3. The supporting pressing device 3 is arranged at the middle position of the third cross beam 203. The 2 groups of bolster center positioning devices 6 are respectively arranged on both sides of the third cross beam 203. The 3 groups of supporting pressing devices 3 and / or the 2 groups of bolster center positioning devices 6 and 1 group of supporting pressing device 3 arranged on the cross beam 2 are arranged in parallel at the positions on each cross beam 2;

[0046] The center line suspension device 7, as Figure 8 shown, the center line suspension device 7 includes a pair, both arranged between the first longitudinal beam 101 and the second longitudinal beam 102, and respectively arranged at both ends of the longitudinal beam 1. The center line suspension device 7 is provided with a square base and is fixed on the ground through the square base. The center line suspension device 7 is made of Q235 carbon steel. A plurality of square fixed bases are arranged on the bottom sides of the first longitudinal beam 101 and the second longitudinal beam 102. The first longitudinal beam 101 and the second longitudinal beam 102 are fixed on the ground through a plurality of square fixed bases in cooperation with bolts.

[0047] For a cross-joint chassis assembly tooling provided by the present utility model, during use:

[0048] Taking the assembly and manufacturing of a C-type subway chassis as an example, the steps for implementing right-side-up resistance welding of the chassis include:

[0049] 1) Use a special lifting tool to lift the bolster into the welding fixture for the direct assembly of the underframe. The main structure consists of 2 longitudinal beams and 5 cross beams. When the workpiece falls into the fixture, use the support and clamping device, and the processing holes on the bolster assembly fall into the bolster center positioning device on the fixture. The fit clearance is controlled within 1 mm.

[0050] 2) The first and second end floors are positioned with the bolster as the reference and fall into the fixture tire. Use the center line suspension device of the fixture together with the first side clamping device with a cantilever structure to correct the precise dimensions of the end floors, and adjust the center of the end floors to coincide with that of the bolster assembly. The positioning of the end floors needs to meet the requirements of the overall length and diagonal of the underframe.

[0051] 3) After the position of the bolster assembly and the end floors is determined, place the two side beams at the lap joints of the two end floors and the bolster, adjust the two side beams to be symmetric about the center line, and insert the first connecting plate and the second connecting plate at the connection between the end floors and the bolster.

[0052] 4) Apply an 8-mm aluminum gasket at the position where the support and clamping device of the fixture contacts the outermost end of the end floor to prefabricate an 8-mm pre-deformation. Use the first side clamping device and the second side clamping device. When all workpieces fall into the underframe welding fixture, the support and clamping device is used to form an overall arched cross-connected structure of the underframe.

[0053] 5) Weld and fix the whole. When fixing, first tack-weld the sides of the first and second end floors close to the center of the car body with the upper side beam, and then tack-weld the welds between the bolster assembly and the connecting plate and the welds between the connecting plate and the end floor. The direct assembly welding of the underframe is completed.

[0054] The steps for the reverse assembly resistance welding of the underframe include:

[0055] 1) After the welds at the joints of the front workpieces of the underframe are welded, use a special flipping lifting tool to flip the underframe and then let it fall into the reverse assembly welding fixture of the underframe.

[0056] 2) Apply aluminum gaskets to prefabricate the deflection on the reverse assembly welding fixture. Apply a 57-mm aluminum pad in the area of the 4 contact points between the bolster assembly and the fixture, apply a 60-mm aluminum pad at the center position, and apply a 35-mm aluminum pad at both ends of the end floor (apply a 55-mm aluminum pad for the underframe of the head car).

[0057] 3) Before welding, use a special chain hoist linkage pulling-down device to pull down the underframe to make it flat against the fixture, and use a jack to pre-tighten the position of the bolster profile.

[0058] 4) Support the screw jack at the vacant part in the middle of the underframe to reduce the welding deformation. Weld from the middle position of the connection weld to both sides. After all the reverse assembly welds are welded, wait for the heat of the welds to dissipate and then remove the pulling-down device.

[0059] The deflection values of the underframes welded by this process method are all within 7 mm, meeting the requirements for the overall deflection values of the arched cross-connected type underframes.

[0060] The underframe assembly tooling provided by the utility model solves the problem of welding deformation, reduces welding stress, improves production efficiency and qualification rate, and has a simpler operation method. Through the reference of the center line suspension device and the bolster center positioning device, the positioning device does not move or transform during the welding process, ensuring accuracy while improving efficiency and reducing costs.

[0061] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A cross-frame assembly tool, characterized in that: include: Two longitudinal beams and a plurality of transverse beams, the two longitudinal beams are arranged in parallel, the two ends of the plurality of transverse beams are respectively connected to the two longitudinal beams, the transverse beams are each provided with a supporting and tightening device, and the longitudinal beams are each provided with at least one set of side tightening devices and a lower pressing device; The cross beams include 5 groups, which are arranged on the longitudinal beams from left to right, namely the first cross beam, the second cross beam, the third cross beam, the fourth cross beam and the fifth cross beam, and the first cross beam, the second cross beam, the third cross beam, the fourth cross beam and the fifth cross beam are each provided with 3 groups of supporting and tightening devices; The two longitudinal beams are a first longitudinal beam and a second longitudinal beam, the side jacking device comprises a first side jacking device, the first crossbeam, the second crossbeam, the fourth crossbeam and the fifth crossbeam are all provided with the first side jacking device on one side where the first crossbeam, the second crossbeam, the fourth crossbeam and the fifth crossbeam are connected to the first longitudinal beam, and the first crossbeam, the second crossbeam and the fifth crossbeam are all provided with the first side jacking device on one side close to the second longitudinal beam; The lower pressing device comprises a cantilever unit and a screw rod arranged at the end of the cantilever unit, and the screw rod can move up and down along the vertical direction.

2. The bridging chassis assembly tool according to claim 1, characterized in that: A lower clamping device is provided on one side of the connection between the fourth cross beam and the first longitudinal beam, and a lower clamping device is provided on one side of the connection between the fourth cross beam, the fifth cross beam and the second longitudinal beam.

3. The bridging chassis assembly tool according to claim 1, characterized in that: The three groups of supporting and tightening devices on the third cross beam can be replaced by a pair of bolster center positioning devices and a group of supporting and tightening devices. The bolster center positioning devices are respectively arranged on both sides of the third cross beam, and the supporting and tightening devices are arranged in the middle position of the third cross beam.

4. The bridging chassis assembly tool according to claim 1, characterized in that: The side tightening device also includes a second side tightening device, and the second side tightening device is arranged on one side of the connection between the two ends of the third cross beam and the longitudinal beam.

5. The bridging chassis assembly tool according to claim 4, characterized in that: The first side tightening device includes a fixed base and a cantilever module arranged on the fixed base, and the second side tightening device includes a fixed base, a cantilever module and a heightened aluminum plate arranged on the fixed base, and the heightened aluminum plate connects the fixed base and the cantilever module.

6. The bridging chassis assembly tool according to claim 1, characterized in that: It also includes a centerline suspension device, which includes a pair of centerline suspension devices, which are respectively arranged at two ends of the longitudinal beam.

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