Adjustable suspension arm structure for rail vehicle underframe equipment

Abstract

The present invention discloses an adjustable suspension arm structure for a rail vehicle underframe device, which comprises: a fixed seat, a suspension arm, an adjusting screw and a nut block; the fixed seat is provided with an open slot, one end of the suspension arm is accommodated in the open slot and the suspension arm and the open slot are slidably connected; a mounting slot is provided on the suspension arm, and the nut block is slidably arranged in the mounting slot; the nut block has a through internal threaded hole; the adjusting screw comprises a smooth section and a threaded section, the smooth section is provided with a circumferentially extending limiting step, and the threaded section is provided with an external thread; the threaded section is threadedly connected to the nut block, the smooth section is rotatably connected to the fixed seat, and the fixed seat is provided with a limiting slot for limiting the axial movement of the limiting step. The suspension arm of the present invention can move in the open slot of the fixed seat, and by reasonably adjusting the extension of the suspension arm, the equipment can be lifted and lowered vertically without being affected by the overlapping parts, and the structure is simple, safe and reliable.

Description

Technical Field

[0001] The invention relates to an adjustable suspension arm structure of a rail vehicle underframe equipment, belonging to the technical field of rail vehicle underframe equipment installation. Background Art

[0002] Currently, the underframe equipment of urban rail transit vehicles such as subways and light rails mostly adopts a support installation method (the equipment suspension arm is overlapped and fixed on the side beam or suspension beam of the vehicle body underframe). The equipment suspension arm is usually fixed to the equipment box with an integrated structure. Due to the need for disassembly during equipment installation and subsequent maintenance, the use of this structure requires notches to be processed in the vehicle body side beam or the suspension beam to be disassembled at the same time, which consumes a lot of man-hours. At the same time, in order to prevent the order and path of equipment installation and disassembly from being affected by other components, it also greatly limits the layout design space of the underframe equipment. With the increase in the degree of intelligence and the diversity of user needs, this is very unfavorable to fully utilizing the limited underframe equipment layout space. Summary of the Invention

[0003] To overcome the problems of the prior art, the present invention provides an adjustable suspension arm structure for rail vehicle undercarriage equipment. The telescopic adjustment of the suspension arm facilitates direct vertical installation and removal of the undercarriage equipment, improving the utilization of the undercarriage equipment layout space. The specific technical solution is as follows.

[0004] An adjustable suspension arm structure for a rail vehicle underframe device, characterized by comprising: a fixing seat, a suspension arm, an adjusting screw and a nut block;

[0005] The fixing seat is provided with an open slide groove, one end of the suspension arm is accommodated in the open slide groove, and the suspension arm and the open slide groove are slidably connected; the suspension arm is provided with a mounting slot, and the nut block is slidably arranged in the mounting slot; the nut block has an internal threaded hole extending therethrough;

[0006] The adjusting screw includes a smooth section and a threaded section, the smooth section is provided with a circumferentially extending limiting step, and the threaded section is provided with an external thread; the threaded section is threadedly connected to the nut block, the smooth section is rotatably connected to the fixed seat, and the fixed seat is provided with a limiting groove for limiting the axial movement of the limiting step.

[0007] With the above-described technical solution, since the limiting slot restricts the axial movement of the adjustment screw, rotating the adjustment screw drives the nut block and suspension arm to slide relative to the fixed seat, thereby adjusting the length of the suspension arm extending beyond the fixed seat and enabling flexible telescopic adjustment of the suspension arm's length. The fixed seat is fixed to the chassis equipment through welding or other means. During installation of the chassis equipment, the suspension arm is first shortened. After the chassis equipment is vertically lifted into position, the suspension arm is extended to overlap the vehicle chassis side beam. During normal use, the load of the chassis equipment is directly transmitted from the fixed seat to the suspension arm through the contact surface with the suspension arm, and then to the overlapping area (such as the chassis side beam). The adjustment mechanism consisting of the adjustment screw, nut block, etc. does not bear the load of the chassis equipment, thereby preventing the subsequent shortening of the suspension arm during disassembly of the chassis equipment. The terms "axial" and "circumferential" refer to the axial and circumferential directions of the adjustment screw.

[0008] Furthermore, the extending direction of the mounting slot is perpendicular to the extending direction of the opening sliding slot, and the extending direction of the opening sliding slot is parallel to the axial direction of the adjusting screw.

[0009] Furthermore, a cover plate is included, which is fixed to the fixing base by fasteners, and the smooth section is rotatably clamped between the fixing base and the cover plate, and the fixing base and the cover plate are both provided with the limiting slots. The provision of the cover plate facilitates the installation and removal of the adjusting screw.

[0010] Furthermore, a manipulation knob is provided at one end of the adjusting screw distal from the suspension arm. Preferably, the manipulation knob has a through hole extending perpendicularly to the axial direction of the adjusting screw. The manipulation knob has two parallel surfaces, facilitating the use of tools such as a wrench to rotate the adjusting screw; the through hole facilitates the use of tools such as an iron rod to rotate the adjusting screw.

[0011] Furthermore, the suspension arm includes a bottom plate and two ribs, the planes of the two ribs are perpendicular to the plane of the bottom plate, and the mounting slots are provided on the ribs. The ribs are used to strengthen the structural strength of the suspension arm, which is beneficial to reducing the weight of the entire suspension arm.

[0012] Furthermore, the open chute further comprises two guide grooves, and the two sides of the base plate are respectively slidably matched with the two guide grooves. The provision of the guide grooves can better prevent the suspension arm from accidentally falling out of the open chute.

[0013] Furthermore, a stop bar is provided on the fixing seat, and the stop bar is used to limit the extreme position of movement of the nut block. The stop bar is used to limit the maximum extension length of the suspension arm to prevent the suspension arm from escaping from the slide groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects.

[0015] The present invention proposes an adjustable suspension arm structure, which can move in the opening slide of the fixed seat. By reasonably adjusting the extension of the suspension arm, the equipment will not be affected by the overlapping parts during the vertical lifting process. The structure is simple, safe and reliable.

[0016] An open slot is provided on the fixing seat to provide space for adding ribs to the suspension arm. At the same time, considering the force distribution when the equipment is installed, an unequal thickness structure is adopted (that is, the thickness close to one end of the suspension arm is greater than the thickness of the other end), so as to minimize the size and occupied space while ensuring strength and rigidity.

[0017] During normal use, the equipment load will be directly transferred from the fixed seat to the suspension arm through the contact surface with the suspension arm, and then to the overlapping part. The control link composed of the adjusting screw, nut block, etc. does not bear the equipment load; when the above-mentioned load transmission path fails, two backup load transmission paths are formed through the fixed seat, cover plate, adjusting screw, nut block, suspension arm and through the fixed seat, stop strip, suspension arm, that is, the present invention has an anti-falling function.

[0018] The operating part of the adjusting screw is a convex block with a hole, which can adapt to various tools such as wrenches and iron bars.

[0019] The adjusting screw is provided with steps for limiting the position, and the installation area is composed of a fixing seat and a cover plate, which is convenient for installation.

[0020] The adjustment mechanism composed of the adjusting screw and the nut block can realize stepless adjustment of the extension amount of the suspension arm and has good self-locking performance; at the same time, due to the structural symmetry and positional symmetry of the adjusting screw, the nut block and the suspension arm, the transmission force can be evenly and symmetrically transmitted to the suspension arm through the raised parts on both sides of the nut block, avoiding the suspension arm from getting stuck in the slide groove due to uneven force.

[0021] The upper surface of the nut block is slightly higher than the suspension arm rib plate, so that it can contact the stop bar to achieve a stop function and prevent the suspension arm from escaping from the slide groove.

[0022] The installation hole position of the stop bar can be adjusted as needed to control the maximum extension of the suspension arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the adjustable suspension arm structure of the present invention;

[0024] Figure 2 is a schematic diagram of the fixed seat;

[0025] Figure 3 is a schematic diagram of the adjusting screw;

[0026] Figure 4 is a schematic diagram of the suspension arm;

[0027] Figure 5 It is a schematic diagram of the nut block.

[0028] In the figure: 1-fixed seat, 2-suspension arm, 3-adjusting screw, 4-nut block, 5-cover plate, 6-stop strip, opening slide 1.1, limit slot 1.2, guide slot 1.11, mounting slot 2.1, bottom plate 2.2, rib plate 2.3, smooth section 3.1, threaded section 3.2, limit step 3.3, operating protrusion 3.4, through hole 3.5. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the accompanying drawings.

[0030] See also Figure 1-Figure 5 , an adjustable suspension arm structure of a rail vehicle underframe device, comprising: a fixing seat 1, a suspension arm 2, an adjusting screw 3 and a nut block 4;

[0031] The fixing base 1 is provided with an open slide groove 1.1, in which one end of the suspension arm 2 is accommodated, and the suspension arm 2 and the open slide groove 1.1 are slidably connected; the suspension arm 2 is provided with a mounting groove 2.1, in which a nut block 4 is slidably disposed; the nut block 4 has an internal threaded hole extending therethrough;

[0032] The adjusting screw 3 includes a smooth section 3.1 and a threaded section 3.2. The smooth section 3.1 is provided with a circumferentially extending limit step 3.3, and the threaded section 3.2 is provided with an external thread; the threaded section 3.2 is threadedly connected to the nut block 4, and the smooth section 3.1 is rotatably connected to the fixed seat 1, and the fixed seat 1 is provided with a limit slot 1.2 for limiting the axial movement of the limit step 3.3.

[0033] The extending direction of the mounting slot 2.1 is perpendicular to the extending direction of the opening slide slot 1.1, and the extending direction of the opening slide slot 1.1 is parallel to the axial direction of the adjusting screw 3.

[0034] Furthermore, the adjustable suspension arm structure includes a cover plate 5, which is fixed to the fixing base 1 via fasteners (bolts, etc.). The smooth section 3.1 is rotatably clamped between the fixing base 1 and the cover plate 5. Limiting slots 1.2 are provided on both the fixing base 1 and the cover plate 5. The provision of the cover plate 5 facilitates installation and removal of the adjusting screw 3.

[0035] Preferably, an operating lug 3.4 is provided on the end of the adjusting screw 3 away from the suspension arm 2. Preferably, a through hole 3.5 is provided on the operating lug 3.4, extending perpendicularly to the axial direction of the adjusting screw 3. The two parallel surfaces on the operating lug 3.4 facilitate the use of a tool such as a wrench to rotate the adjusting screw 3; the provision of the through hole 3.5 also facilitates the use of a tool such as an iron rod to rotate the adjusting screw 3.

[0036] Furthermore, the suspension arm 2 includes a base plate 2.2 and two ribs 2.3. The planes of the two ribs 2.3 are perpendicular to the plane of the base plate 2.2. The mounting slots 2.1 are provided on the ribs 2.3. The ribs 2.3 are used to strengthen the structural strength of the suspension arm 2, thereby reducing the weight of the entire suspension arm 2.

[0037] Furthermore, the opening chute 1.1 further includes two guide grooves 1.11, and the two sides of the bottom plate 2.2 are respectively slidably engaged with the two guide grooves 1.11. The provision of the guide grooves 1.11 can better prevent the suspension arm 2 from accidentally falling out of the opening chute 1.1.

[0038] Furthermore, a stop bar 6 is provided on the fixing seat 1, which is used to limit the extreme position of movement of the nut block 4. The stop bar 6 is used to limit the maximum extension length of the suspension arm 2 to prevent the suspension arm 2 from escaping from the chute.

[0039] With the above-described technical solution, since the limiting slot 1.2 restricts the axial movement of the adjusting screw 3, rotating the adjusting screw 3 drives the nut block 4 and the suspension arm 2 to slide relative to the fixing base 1, thereby adjusting the length of the suspension arm 2 extending beyond the fixing base 1 and enabling flexible adjustment of the length of the suspension arm 2. The fixing base 1 is fixed to the chassis by welding or other means. During chassis installation, the suspension arm 2 is first shortened. After the chassis is vertically raised into position, the suspension arm 2 is extended to overlap the vehicle chassis side beam. During normal use, the chassis load is directly transmitted from the fixing base 1 to the suspension arm 2 through the contact surface with the suspension arm 2, and then to the overlapping area (such as the chassis side beam). The adjustment mechanism, consisting of the adjusting screw 3, nut block, etc., does not bear the chassis load, thus preventing the subsequent shortening of the suspension arm 2 during chassis disassembly. The terms "axial" and "circumferential" refer to the axial and circumferential directions of the adjusting screw 3.

[0040] The embodiments of the present invention are described above in conjunction with the accompanying drawings. The embodiments of the present invention and the features thereof may be combined with each other unless there is any conflict. The present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Under the guidance of the present invention, those skilled in the art may devise various forms without departing from the spirit of the present invention and the scope of protection of the claims. All of these forms fall within the scope of protection of the present invention.

Claims

1. An adjustable suspension arm structure for a railway vehicle underframe, characterized in that: include: Fixed seat, suspension arm, adjusting screw and nut block; The fixing seat is provided with an open slide groove, one end of the suspension arm is accommodated in the open slide groove, and the suspension arm and the open slide groove are slidably connected; the suspension arm is provided with a mounting slot, and the nut block is slidably arranged in the mounting slot; the nut block has an internal threaded hole extending therethrough; The adjusting screw includes a smooth section and a threaded section, the smooth section is provided with a circumferentially extending limiting step, and the threaded section is provided with an external thread; the threaded section is threadedly connected to the nut block, the smooth section is rotatably connected to the fixing seat, and the fixing seat is provided with a limiting groove for limiting axial movement of the limiting step; The extending direction of the mounting slot is perpendicular to the extending direction of the opening sliding slot, and the extending direction of the opening sliding slot is parallel to the axial direction of the adjusting screw.

2. An adjustable suspension arm structure for a railway vehicle undercarriage according to claim 1, characterized in that: It also includes a cover plate, which is fixed to the fixing base by fasteners. The smooth section is rotatably clamped between the fixing base and the cover plate. The fixing base and the cover plate are both provided with the limiting slots.

3. The adjustable suspension arm structure of a railway vehicle undercarriage equipment according to claim 1, characterized in that: An operating protrusion is provided at one end of the adjusting screw away from the suspension arm.

4. An adjustable suspension arm structure for a railway vehicle undercarriage according to claim 3, characterized in that: The operating protrusion is provided with a through hole, and the extending direction of the through hole is perpendicular to the axial direction of the adjusting screw.

5. The adjustable suspension arm structure of a railway vehicle undercarriage equipment according to claim 1, characterized in that: The suspension arm includes a bottom plate and two ribs, the planes where the two ribs are located are perpendicular to the plane where the bottom plate is located, and the mounting slots are arranged on the ribs.

6. An adjustable suspension arm structure for a railway vehicle undercarriage according to claim 5, characterized in that: The opening slide also includes two guide grooves, and the two sides of the bottom plate are respectively slidably matched with the two guide grooves.

7. An adjustable suspension arm structure for a railway vehicle undercarriage according to claim 1, characterized in that: A stop bar is also provided on the fixing seat, and the stop bar is used to limit the extreme position of the movement of the nut block.

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