Manually driven heavy rigid lifting support

Abstract

The utility model discloses a kind of human-powered heavy rigid lifting support seat, including inside hollow and top opening shell, fixedly arranged with mounting seat in the shell, the top surface of the mounting seat is rotatably connected with horizontally arranged large gear, the side of the mounting seat is rotatably connected with vertically arranged small gear, the shell is located on the side of small gear and is provided with the opening of small gear exposing shell. The utility model is pure mechanical structure, when using, operator uses tool to twist driving part to drive large gear rotation, large gear drives nut seat and nut rotation, since nut and bolt thread connection and bolt guiding sleeve is sleeved on the bolt head outside bolt to limit bolt rotation, threaded cooperation converts the rotation movement of nut into bolt lifting movement, to adjust workpiece lifting, structure is rigidly locked, support seat height is constant when bearing heavy pressure, stability is high, not easy to damage, and for pure human-powered height adjustment, no need external power.

Description

Technical Field

[0001] This utility model belongs to the technical field of upsetting machine support base, and particularly relates to a manually driven heavy-duty rigid lifting support base. Background Technology

[0002] When using an upsetting machine to upset a workpiece, the workpiece needs to be placed on a lifting support seat, and the height of the lifting support seat needs to be adjusted to upset parts of different lengths.

[0003] Currently, there are two types of existing lifting support seats: one is the hydraulic support seat, which is driven by a hydraulic cylinder to achieve lifting; the other is the electric screw support seat, which uses a motor to drive a screw to achieve lifting.

[0004] However, hydraulic support seats are prone to hydraulic oil leakage, causing a slow descent in height and making it impossible to maintain a constant position; the system requires continuous power supply (such as an electric pump or diesel pump), resulting in a high failure rate and high maintenance costs; poor load-bearing stability, with the height easily changing under sudden heavy pressure (the instantaneous impact at the initial contact during upsetting is much greater than the subsequent pressure), leading to low repeatability accuracy in the upsetting process. Electric screw support seats rely on an external power source, and the motor is prone to overload and burnout under heavy pressure; their structure is complex and non-disassembly is not possible, requiring specialized equipment for maintenance. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a human-powered heavy-duty rigid lifting support.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A manually driven heavy-duty rigid lifting support includes a hollow shell with an open top. A mounting base is fixedly installed inside the shell. A horizontally arranged large gear is rotatably connected to the top surface of the mounting base, and a vertically arranged small gear is rotatably connected to the side of the mounting base. An opening is provided on one side of the small gear on the shell, allowing the small gear to protrude from the shell. The small gear is provided with a driving part for manually driving the small gear to rotate. The small gear and the large gear mesh perpendicularly with each other. A nut seat is fixedly connected to the top of the large gear, and a nut is embedded in the top of the nut seat. A lifting bolt is internally threaded onto the nut. The top of the lifting bolt head protrudes from the top surface of the shell. A bolt guide sleeve is fixedly installed inside the top opening of the shell, and the bolt guide sleeve is fitted over the bolt head of the lifting bolt to restrict the rotation of the lifting bolt.

[0008] Preferably, the housing includes a lower housing and an upper housing, the lower housing has an opening at the top, the upper housing is vertically continuous, the upper housing covers the top of the lower housing, the mounting base is disposed inside the lower housing, the opening is disposed on the side wall of the lower housing, and the bolt guide sleeve is disposed inside the opening at the top of the upper housing.

[0009] Preferably, the transmission ratio between the pinion and the gear is 1:3.25.

[0010] Preferably, the mounting base has a vertical shaft hole at its top center, and a vertical bearing is installed in the vertical shaft hole. The shaft of the large gear is connected to the vertical shaft hole through the vertical bearing. The mounting base has a horizontal shaft hole on its side, and a horizontal bearing is installed in the horizontal shaft hole. The shaft of the small gear is connected to the horizontal shaft hole through the horizontal bearing.

[0011] Preferably, the bottom of the vertical bearing is provided with a lifting structure, which includes a lifting block, a sliding block, and an adjusting screw. The lifting block is slidably connected in the vertical shaft hole and can slide up and down along the vertical shaft hole. The lifting block is located at the bottom of the vertical bearing, and the bottom of the lifting block is provided with a horizontally opened slide groove. The top surface of the slide groove is an inclined surface. The sliding block is slidably connected in the slide groove and can slide horizontally along the slide groove. The top surface of the sliding block is an inclined surface that fits against the top surface of the slide groove. The bottom surface of the sliding block abuts against the bottom of the vertical shaft hole. The adjusting screw passes through the mounting base laterally and is threadedly connected to the mounting base. One end of the bolt head of the adjusting screw extends from the opening of the housing, and the other end abuts against one side of the sliding block.

[0012] Preferably, the vertical bearing is a combined needle roller bearing.

[0013] Preferably, the driving part is an internal hexagonal hole located at the center of the pinion.

[0014] Preferably, the large gear and the nut seat are fixedly connected by bolts, and a key block is embedded between the upper surface of the large gear and the lower surface of the nut seat. The hardness of the key block is less than the hardness of the large gear and the nut seat.

[0015] Preferably, a threaded hole is provided on the side wall of the upper housing at the height of the nut seat and the bolt guide sleeve, and a tightening bolt is threaded into the threaded hole, with the end of the tightening bolt pressing against the side wall of the nut seat and the bolt guide sleeve respectively.

[0016] Preferably, the lifting bolt is of metric M64-12.9 grade, and the nut is of metric M64-12 grade.

[0017] The beneficial effects of this utility model are:

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] This utility model is a purely mechanical structure. When in use, the operator uses a tool to twist the drive unit to drive the large gear to rotate. The large gear drives the nut seat and nut to rotate. Since the nut and bolt are threadedly connected and the bolt guide sleeve is fitted outside the bolt head to restrict the bolt rotation, the threaded fit converts the rotational motion of the nut into the lifting motion of the bolt, thereby adjusting the lifting of the workpiece. The structure is rigidly locked, and the height of the support seat remains constant when subjected to heavy pressure. It has high stability, is not easily damaged, and the height adjustment is purely manually driven, without the need for external power. Attached Figure Description

[0020] Figure 1 This is a 1 / 2 sectional view of the present invention;

[0021] Figure 2 This is a 1 / 4 sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of this utility model.

[0023] In the diagram: 11. Lower housing; 12. Upper housing; 121. Tightening bolt; 2. Mounting base; 3. Large gear; 31. Key block; 4. Small gear; 41. Drive unit; 5. Nut seat; 51. Nut; 6. Lifting bolt; 7. Bolt guide sleeve; 81. Vertical bearing; 82. Horizontal bearing; 91. Lifting block; 911. Slide groove; 92. Sliding block; 93. Adjusting screw. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-3As shown, this utility model provides a technical solution: a manually driven heavy-duty rigid lifting support, comprising a hollow shell with an open top, a mounting base 2 fixedly disposed inside the shell, a horizontally arranged large gear 3 rotatably connected to the top surface of the mounting base 2, a vertically arranged small gear 4 rotatably connected to the side surface of the mounting base 2, an opening on the shell on one side of the small gear 4 allowing the small gear 4 to protrude from the shell, a driving part 41 for manually driving the rotation of the small gear 4 disposed on the small gear 4, the small gear 4 and the large gear 3 meshing perpendicularly with each other, a nut seat 5 fixedly connected to the top of the large gear 3, a nut 51 embedded in the top of the nut seat 5, a lifting bolt 6 internally threaded onto the nut 51, the top of the bolt head of the lifting bolt 6 protruding from the top surface of the shell, a bolt guide sleeve 7 fixedly disposed inside the top opening of the shell, the bolt guide sleeve 7 being sleeved on the bolt head of the lifting bolt 6 to restrict the rotation of the lifting bolt 6.

[0026] In use, the manually driven heavy-duty rigid lifting support of this utility model is placed on the upsetting machine, and the workpiece is placed on the top surface of the bolt head of the lifting bolt 6. The operator uses a tool to twist the drive unit 41 to drive the large gear 3 to rotate. The large gear 3 drives the nut seat 5 and the nut 51 to rotate. Since the nut 51 is threadedly connected to the lifting bolt 6 and the bolt guide sleeve 7 is sleeved on the bolt head of the lifting bolt 6 to restrict the rotation of the lifting bolt 6, the threaded engagement converts the rotational motion of the nut 51 into the lifting motion of the lifting bolt 6, thereby adjusting the lifting of the workpiece.

[0027] This utility model features a purely mechanical structure with height adjustment driven entirely by human power, eliminating the need for external power. Compared to hydraulic support seats, it eliminates the risk of pressure leakage. The structure utilizes purely threaded mechanical locking for rigidity, ensuring a constant support seat height under heavy load. With a 50-ton load, the height change rate is less than 1%, demonstrating high stability and guaranteeing the repeatability and precision of the upsetting process. Gears, bolts, and nuts are standard parts, and replacement parts can be purchased online, resulting in lower procurement and maintenance costs compared to hydraulic systems.

[0028] Furthermore, the housing includes a lower housing 1 and an upper housing 2. The lower housing 1 has an opening at the top, and the upper housing 2 extends vertically through it, covering the top of the lower housing 1. The mounting base 2 is disposed inside the lower housing 1, and its opening is located on the side wall of the lower housing 1. The bolt guide sleeve 7 is disposed within the opening at the top of the upper housing 2. The detachable design of the lower housing 1 and the upper housing 2 facilitates the assembly and disassembly of this support base, allowing for easy replacement of internal components and maintenance.

[0029] Furthermore, the transmission ratio between the pinion 4 and the gear 3 is 1:3.25. Manually driving the pinion 4 to rotate the gear 3 achieves speed reduction and torque increase, reducing the torque required for adjustment, and allowing female operators to adjust with one hand.

[0030] Furthermore, a vertical shaft hole is provided at the top center of the mounting base 2, and a vertical bearing 81 is installed in the vertical shaft hole. The rotating shaft of the large gear 3 is connected to the vertical shaft hole through the vertical bearing 81. A horizontal shaft hole is provided on the side of the mounting base 2, and a horizontal bearing 82 is installed in the horizontal shaft hole. The rotating shaft of the small gear 4 is connected to the horizontal shaft hole through the horizontal bearing 82. The large gear 3 and the small gear 4 are connected to the mounting base 2 by the vertical bearing 81 and the horizontal bearing 82 respectively, which reduces the friction between the large gear 3 and the small gear 4 and the mounting base 2 when they rotate, making adjustment easier.

[0031] Furthermore, to avoid the problem that the workpiece is heavy when placed on the support, the workpiece presses against the lifting bolt 6, the lifting bolt 6 presses against the nut 51, the nut 51 presses against the nut seat 5, the nut seat 5 presses against the large gear 3, and the large gear 3 presses against the mounting seat 2. This results in significant friction between the large gear 3 and the mounting seat 2, making it difficult to rotate the small gear 4 to drive the large gear 3. Therefore, a lifting structure is provided at the bottom of the vertical bearing 81. The lifting structure includes a lifting block 91, a sliding block 92, and an adjusting screw 93. The lifting block 91 is slidably connected within the vertical shaft hole and can slide up and down along the vertical shaft hole. The lifting block 91 is located at the bottom of the vertical bearing 81. The bottom of the lifting block 91 is provided with a horizontally opened slide groove 911. The top surface of the slide groove 911 is an inclined surface. The sliding block 92 is slidably connected in the slide groove 911 and can slide horizontally along the slide groove 911. The top surface of the sliding block 92 is an inclined surface that fits against the top surface of the slide groove 911. The bottom surface of the sliding block 92 abuts against the bottom of the vertical shaft hole. The adjusting screw 93 passes through the mounting base 2 laterally and is threadedly connected to the mounting base 2. One end of the bolt head of the adjusting screw 93 extends out from the opening of the housing and the other end abuts against one side of the sliding block 92. In use, turn the adjusting screw 93, which pushes the sliding block 92 to slide horizontally. The inclined surface of the top surface of the sliding block 92 and the inclined surface of the top surface of the slide groove 911 come closer and press against each other, pushing the lifting block 91 to slide upward. The lifting block 91 drives the vertical bearing 81 and the large gear 3 to move upward. The large gear 3 leaves the top surface of the mounting base 2. At this time, the operator uses a tool to twist the drive unit 41 to drive the large gear 3 to rotate. There is no friction between the large gear 3 and the top surface of the mounting base 2, making the adjustment easier. After the height adjustment is completed, the vertical bearing 81 and the large gear 3 are adjusted downward by the lifting structure. The large gear 3 falls back to the top surface of the mounting base 2 to bear the heavy pressure during upsetting. Specifically, in use, as long as the large gear 3 leaves the top surface of the mounting base 2, the lifting structure can adjust the lifting range of the large gear 3 to be 0.1mm-1mm.

[0032] Furthermore, the vertical bearing 81 is a combined needle roller bearing. A combined needle roller bearing is a bearing composed of a radial needle roller bearing and a thrust bearing or an angular contact ball bearing. It can simultaneously bear radial and axial loads. When the vertical bearing 81 is adjusted to drive the large gear 3 to move up and down through the lifting structure, the vertical bearing 81 can be prevented from being damaged by axial load.

[0033] Furthermore, the drive unit 41 is an internal hexagonal hole located at the center of the pinion 4. In use, the operator can drive the pinion 4 to rotate by inserting a hexagonal wrench into the internal hexagonal hole and turning it.

[0034] Furthermore, the large gear 3 and the nut seat 5 are fixedly connected by bolts. A key block 31 is embedded between the upper surface of the large gear 3 and the lower surface of the nut seat 5. The hardness of the key block 31 is less than that of the large gear 3 and the nut seat 5. The large gear 3 and the nut seat 5 are fastened by bolts, but the transmission of torque relies on the key block 31. The key block 31 is embedded in both the large gear 3 and the nut seat 5, and is softer than the large gear 3 and the nut seat 5. This design can avoid damage to the large gear 3 and the nut seat 5 when the force is too large after designing them as a single unit. The key block 31 design can prevent damage to the key block 31 without damaging the large gear 3 and the nut seat 5 when the force is too large.

[0035] Furthermore, a threaded hole is provided on the side wall of the upper housing 2 at the height of the nut seat 5 and the bolt guide sleeve 7, and a tightening bolt 121 is threaded into the threaded hole. The end of the tightening bolt 121 is respectively pressed against the side wall of the nut seat 5 and the bolt guide sleeve 7, thereby preventing the nut seat 5 and the bolt guide sleeve 7 from moving by pressing with the tightening bolt 121.

[0036] Furthermore, during upsetting, the pressure of the upsetting machine is 50 tons, and the lifting bolts are selected as type 6, which is metric M64-12.9 grade, and the nuts are selected as type 51, which is metric M64-12 grade.

[0037] Calculate the bearing capacity of the lifting bolts and nuts:

[0038] Lifting bolt (Metric M64-12.9 grade):

[0039] According to GB / T 3098.1-2010 "Mechanical Properties of Fasteners - Bolts, Nails and Studs":

[0040] Nominal tensile strength Rm: 1200MPa;

[0041] Yield-to-tensile strength ratio: 0.9;

[0042] Yield strength: ReL=Rm*0.9=1200*0.9=1080MPa——GB / T 3098.1-2010 "Mechanical Properties of Fasteners - Bolts, Nails and Studs" 5;

[0043] Nominal diameter d: 64mm;

[0044] Pitch P=6mm (coarse thread standard, ISO261) Source: GB / T 193-203 "General Purpose Thread Diameter and Pitch System" Table 1;

[0045] Nuts (Metric M64-12 grade):

[0046] According to GB / T 3098.2-2015 "Mechanical Properties of Fasteners and Nuts":

[0047] Guaranteed load: ≥0.9*Rm=0.9*1200=1080MPa (The grade 12 nut is designed to be a matching nut for the grade 12.9 bolt, so in order to ensure that the bolt fails before the nut, the guaranteed load of the nut is greater than or equal to the bolt yield strength) - according to Appendix A of GB / T3098.2-2015 "Mechanical Properties of Fasteners Nuts";

[0048] Effective stress area As:

[0049] As = (π / 4) * [(d² + d³) / 2]² = 0.7854 * [(d² + d³) / 2]² = 0.7854 * [(d² + d³) / 2]² = 0.7854 * (d - 0.9382 * P)² = 0.7854 * (64 - 0.9382 * 6)² = 2676 ≈ 2680 mm² — ISO 898-1:2013, Mechanical Design Handbook (6th Edition), Volume 2;

[0050] d2: Thread pitch diameter = d - 0.6495P;

[0051] d3: Thread minor diameter = d1 - H / 6;

[0052] d1: Basic minor diameter of external thread = d - 1.0825P;

[0053] H: Thread triangle height = 0.866P;

[0054] Theoretical ultimate tensile force: F_tensile, max = ReL * As = 1080MPa * 2680mm2 = 2894400N = 2894kN — Mechanical Design Handbook (6th Edition), Volume 2, ISO 898-1:2013 Formula for Static Strength Design of Bolts;

[0055] Actual allowable stress: Safety factor k: 1.5 (general mechanical design, static load);

[0056] Allowable stress: F_allowable = F_tensile, max / k = 2894kN / 1.5 = 1930kN — Mechanical Design Handbook;

[0057] Stress to mass conversion: m = F_allowable / g = 1930 * 10³ / 9.8 = 196938 kg = 196.9 t;

[0058] Therefore, the bolt and nut connection has a bearing capacity of 196.9 tons, thus ensuring that the lifting bolt 6 and nut 51 will not be damaged when subjected to the heavy pressure during upsetting.

[0059] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manually driven heavy-duty rigid lifting support, characterized in that, The housing includes a hollow interior and an open top. A mounting base (2) is fixedly installed inside the housing. A large gear (3) is rotatably connected to the top surface of the mounting base (2). A small gear (4) is rotatably connected to the side of the mounting base (2). An opening is provided on one side of the small gear (4) to allow the small gear (4) to protrude from the housing. A drive unit (41) for manually driving the small gear (4) to rotate is provided on the small gear (4). The small gear (4) and the large gear (3) mesh perpendicularly to each other. A nut seat (5) is fixedly connected to the top of the large gear (3). A nut (51) is embedded in the top of the nut seat (5). A lifting bolt (6) is internally threaded onto the nut (51). The top of the bolt head of the lifting bolt (6) protrudes from the top surface of the housing. A bolt guide sleeve (7) is fixedly installed inside the opening at the top of the housing. The bolt guide sleeve (7) is fitted over the bolt head of the lifting bolt (6) to restrict the rotation of the lifting bolt (6).

2. The manually driven heavy-duty rigid lifting support seat according to claim 1, characterized in that, The housing includes a lower housing (11) and an upper housing (12). The lower housing (11) has an opening at the top, and the upper housing (12) is vertically connected. The upper housing (12) covers the top of the lower housing (11). The mounting base (2) is located inside the lower housing (11). The opening is located on the side wall of the lower housing (11). The bolt guide sleeve (7) is located inside the opening at the top of the upper housing (12).

3. The manually driven heavy-duty rigid lifting support seat according to claim 1, characterized in that, The transmission ratio between the pinion (4) and the gear (3) is 1:3.

25.

4. The manually driven heavy-duty rigid lifting support seat according to claim 1, characterized in that, The mounting base (2) has a vertical shaft hole at the top center, and a vertical bearing (81) is installed in the vertical shaft hole. The shaft of the large gear (3) is connected to the vertical shaft hole through the vertical bearing (81). The mounting base (2) has a horizontal shaft hole on its side, and a horizontal bearing (82) is installed in the horizontal shaft hole. The shaft of the small gear (4) is connected to the horizontal shaft hole through the horizontal bearing (82).

5. A manually driven heavy-duty rigid lifting support according to claim 4, characterized in that, The vertical bearing (81) is provided with a lifting structure at its bottom. The lifting structure includes a lifting block (91), a sliding block (92), and an adjusting screw (93). The lifting block (91) is slidably connected in the vertical shaft hole and can slide up and down along the vertical shaft hole. The lifting block (91) is located at the bottom of the vertical bearing (81). The bottom of the lifting block (91) is provided with a horizontally opened slide groove (911). The top surface of the slide groove (911) is an inclined surface. The sliding block (92) 92) The sliding connection is in the slide groove (911) and can slide horizontally along the slide groove (911). The top surface of the sliding block (92) is an inclined surface that fits against the top surface of the slide groove (911). The bottom surface of the sliding block (92) abuts against the bottom of the vertical shaft hole. The adjusting screw (93) passes through the mounting base (2) laterally and is threadedly connected to the mounting base (2). One end of the bolt head of the adjusting screw (93) extends out from the opening of the housing and the other end abuts against one side of the sliding block (92).

6. A manually driven heavy-duty rigid lifting support according to claim 5, characterized in that, The vertical bearing (81) is a combined needle roller bearing.

7. A manually driven heavy-duty rigid lifting support as described in claim 1, characterized in that, The drive unit (41) is an internal hexagonal hole located at the center of the pinion (4).

8. A manually driven heavy-duty rigid lifting support according to claim 1, characterized in that, The large gear (3) and the nut seat (5) are fixedly connected by bolts. A key block (31) is embedded between the upper surface of the large gear (3) and the lower surface of the nut seat (5). The hardness of the key block (31) is less than that of the large gear (3) and the nut seat (5).

9. A manually driven heavy-duty rigid lifting support according to claim 2, characterized in that, The upper housing (12) has a threaded hole at the height of the nut seat (5) and the bolt guide sleeve (7) on its side wall, and a tightening bolt (121) is threaded into the threaded hole. The ends of the tightening bolt (121) are respectively tightened against the side walls of the nut seat (5) and the bolt guide sleeve (7).

10. A manually driven heavy-duty rigid lifting support according to claim 1, characterized in that, The lifting bolt (6) is of metric M64-12.9 grade, and the nut (51) is of metric M64-12 grade.

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