Hydraulic machine with adjustable worktable parallelism
By introducing an adjustment mechanism into the hydraulic press, the automatic parallelism adjustment of the upper and lower worktables is achieved using ball heads and lifting flanges, solving the problem of inconsistent product thickness caused by differences in parallelism in the hydraulic press and improving the operating efficiency of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG MEILI HIGH TECH
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-23
AI Technical Summary
In existing hydraulic presses with adjustable worktable parallelism, the worktable surfaces have parallelism differences, which causes uneven loading of the cylinder tie rods, resulting in inconsistent product thickness and affecting production capacity.
An adjustment mechanism, including a connecting shaft, ball head, and lifting flange, is adopted. The ball head and groove cooperate to automatically adjust the parallelism of the upper and lower worktables, ensuring the consistency of the product forming thickness.
By adjusting the mechanism, the problem of uneven load distribution due to parallelism issues was resolved, ensuring the consistency of product forming thickness and improving equipment uptime.
Smart Images
Figure CN224392028U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic press technology, and in particular to a hydraulic press with adjustable worktable parallelism. Background Technology
[0002] The working principle of the hydraulic press with adjustable worktable parallelism is as follows: the lower worktable is a fixed worktable, and the upper worktable is a transmission mechanism that makes up-down reciprocating motion (refer to the existing patent: Hydraulic press with adjustable worktable parallelism for powder metallurgy, announcement number "CN107552784B"; application date: 2017.09.04).
[0003] In existing hydraulic presses with adjustable worktable parallelism, the upper worktable surface and the cylinder tie rod are fixedly connected by flange bolts. There is a certain parallelism difference between the two worktable surfaces. During operation, the cylinder tie rod is always under an off-center load. Over time, phenomena such as cylinder tie rod deformation, cylinder oil leakage, and breakage of fixing bolts occur frequently, resulting in inconsistent thickness of the formed products during the production process, which seriously affects the output capacity. Utility Model Content
[0004] The purpose of this invention is to provide a hydraulic press with adjustable worktable parallelism, which solves the problem of uneven worktable parallelism in existing hydraulic presses, resulting in inconsistent thickness of the formed products during production and seriously affecting production capacity.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] This utility model provides a hydraulic press with adjustable worktable parallelism, including a machine frame, an upper worktable disposed inside the machine frame, and a lower worktable cooperating with and located below the upper worktable. The machine frame is provided with a cylinder body for driving the upper worktable to move longitudinally, and also includes an adjustment mechanism for adjusting the parallelism between the upper worktable and the lower worktable. The adjustment mechanism includes a connecting shaft mounted on the bottom end of the drive shaft of the cylinder body, a ball head disposed on the bottom end of the connecting shaft, and a lifting flange detachably connected to the upper surface of the upper worktable. The lifting flange is sleeved on the connecting shaft and movably connected to the outer edge surface of the connecting shaft. The upper worktable is provided with a groove for embedding the ball head, and the inner wall of the groove is arc-shaped.
[0007] Furthermore, an annular groove is provided on the outer edge surface of the connecting shaft along its circumference, and an annular boss that mates with the annular groove is provided on the inner wall of the top end of the lifting flange along its circumference, the thickness of the annular boss being less than the longitudinal height of the annular groove.
[0008] Furthermore, a ball head seat that mates with the ball head is provided in the groove, and the ball head seat is interference-fitted in the groove.
[0009] Furthermore, the bottom end of the outer edge of the ball head is planar.
[0010] Furthermore, the bottom of the ball head seat is provided with a through hole, the inner diameter of which is greater than the length of the bottom plane of the ball head.
[0011] Furthermore, the ball head and the connecting shaft are integrally formed.
[0012] Furthermore, both the outer edge of the ball head and the inner surface of the ball head seat are provided with a wear-resistant layer.
[0013] Furthermore, the upper end face of the upper worktable is provided with a limiting groove for limiting the lifting flange.
[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0015] This utility model provides a hydraulic press with adjustable worktable parallelism, including a machine frame, an upper worktable disposed inside the machine frame, and a lower worktable cooperating with and located below the upper worktable. The machine frame is equipped with a cylinder body for driving the upper worktable longitudinally. It also includes an adjustment mechanism for adjusting the parallelism between the upper and lower worktables, comprising a connecting shaft mounted at the bottom end of the cylinder body's drive shaft, a ball head disposed at the bottom end of the connecting shaft, and a lifting flange detachably connected to the upper surface of the upper worktable. The lifting flange is sleeved on the connecting shaft and movably connected to its outer edge. The upper worktable has a groove for embedding the ball head, the inner wall of which is arc-shaped. This hydraulic press with adjustable worktable parallelism allows for adjustment of the parallelism between the upper and lower worktables during operation, thus solving the problem of uneven load distribution due to parallelism issues, ensuring consistent product forming thickness, and significantly improving equipment uptime. Attached Figure Description
[0016] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:
[0017] Figure 1 This is a cross-sectional view of the overall structure of a preferred embodiment of the present invention;
[0018] Figure 2 This is a partial enlarged view of a preferred embodiment of the present invention;
[0019] Figure 3 This is an exploded view of the adjustment mechanism of a preferred embodiment of the present invention.
[0020] The reference numerals in the attached figures are explained as follows:
[0021] 1. Machine tool frame; 2. Upper worktable; 3. Lower worktable; 4. Hydraulic cylinder body; 5. Adjustment mechanism; 51. Connecting shaft; 52. Ball head; 53. Lifting flange; 6. Groove; 7. Ball head seat; 8. Annular boss; 9. Annular groove; 10. Wear-resistant layer; 11. Through hole; 12. Limiting groove. Detailed Implementation
[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0025] refer to Figure 1 , Figure 2 and Figure 3 The present invention provides a hydraulic press with adjustable worktable parallelism, comprising a machine frame 1, an upper worktable 2 disposed inside the machine frame 1, and a lower worktable 3 cooperating with and located below the upper worktable 2, the lower worktable 3 being fixed to the bottom of the machine frame 1; the machine frame 1 is provided with a cylinder body 4 for driving the upper worktable 2 to move longitudinally, the cylinder body 4 being inverted on the top of the outside of the machine frame 1, and the drive shaft of the cylinder body 4 slidingly passing through the machine frame 1 and extending into the machine frame 1.
[0026] refer to Figure 1 , Figure 2 and Figure 3 It also includes an adjustment mechanism 5 for adjusting the parallelism between the upper worktable 2 and the lower worktable 3. The adjustment mechanism 5 includes a connecting shaft 51 installed at the bottom end of the drive shaft of the cylinder body 4, a ball head 52 located at the bottom end of the connecting shaft 51, and a lifting flange 53 detachably connected to the upper end face of the upper worktable 2. The ball head 52 is integrally formed with the connecting shaft 51 to improve the overall strength. The top end of the lifting flange 53 is sleeved on the connecting shaft 51 and is movably connected to the outer edge surface of the connecting shaft 51. The upper worktable 2 is provided with a groove 6 for embedding the ball head 52. The inner wall of the groove 6 is arc-shaped. A ball head seat 7 that mates with the ball head 52 is provided in the groove 6. The ball head seat 7 is interference-fitted in the groove 6.
[0027] refer to Figure 1 , Figure 2 and Figure 3 The working principle is that during the downward pressing of the hydraulic cylinder, when a difference in parallelism occurs between the upper and lower worktables, after a certain position on the upper end face of the upper worktable 2 contacts the lower worktable, the lower worktable 3 applies an upward thrust to the upper worktable 2. Under the action of this thrust, the ball head seat 7 rotates along the ball head 52 until the upper worktable 2 and the lower worktable 3 are tightly fitted together, thereby automatically adjusting the parallelism of the upper worktable 2 and the lower worktable 3. Subsequently, when pressing products with this hydraulic press that can adjust the parallelism of the worktables, it can ensure the consistency of product thickness, distribute the force of off-center load, and improve the utilization rate of the equipment.
[0028] refer to Figure 1 , Figure 2 and Figure 3 An annular groove 9 is provided along the circumference of the outer edge of the connecting shaft 51. An annular boss 8 that mates with the annular groove 9 is provided along the circumference of the inner wall of the top of the lifting flange 53. The thickness of the annular boss 8 is less than the longitudinal height of the annular groove 9. When the bottom end of the lifting flange 53 abuts against the upper end face of the upper worktable 2, the annular boss 8 is located exactly in the annular groove 9. There is a gap between the upper end face of the annular boss 8 and the upper inner wall of the annular groove 9, and between the lower end face of the annular boss 8 and the lower inner wall of the annular groove 9, ensuring that the lifting flange 53 can move longitudinally within the annular groove 9. In this example, the lifting flange 53 is formed by welding two semi-arc plates into an annular shape.
[0029] refer to Figure 1 , Figure 2 and Figure 3The bottom edge of the ball head 52 is flat. While ensuring the ball head seat 7 can rotate around the ball head 52, making the bottom edge of the ball head 52 flat reduces the contact area between the ball head 52 and the ball head seat 7, thus reducing friction. A through hole 11 is provided at the bottom of the ball head seat 7. The inner diameter of the through hole 11 is larger than the length of the bottom plane of the ball head 52, which reduces the weight of the ball head seat 7.
[0030] refer to Figure 1 , Figure 2 and Figure 3 Both the outer edge of the ball head 52 and the inner surface of the ball head seat 7 are provided with a wear-resistant layer 10. The wear-resistant layer 10 is made of steel and can protect the ball head 52 and the ball head seat 7, extending their service life. The upper end face of the upper worktable 2 is provided with a limiting groove 12 for limiting the lifting flange 53. The limiting groove 12 limits the lifting flange 53, improving the firmness and stability of the lifting flange 53 on the upper end face of the upper worktable 2. When the bottom end of the lifting flange 53 is embedded in the limiting groove 12, the annular boss 8 on its top inner wall can also ensure that there is a gap between it and the upper and lower inner walls of the annular groove 9. The lifting flange 53 is provided with multiple fixing bolts along its circumference, and the lifting flange 53 is detachably connected to the upper end face of the upper worktable 2 by fixing bolts.
[0031] In summary, this hydraulic press with adjustable worktable parallelism can adjust the parallelism between the upper worktable 2 and the lower worktable 3 through the adjustment mechanism 5 during operation, thereby solving the problem of uneven load distribution caused by parallelism issues, ensuring the consistency of product forming thickness, and greatly improving the equipment's uptime.
[0032] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.
Claims
1. A hydraulic press with adjustable worktable parallelism, comprising a machine frame (1), an upper worktable (2) disposed inside the machine frame (1), and a lower worktable (3) cooperating with and located below the upper worktable (2), wherein the machine frame (1) is provided with a cylinder body (4) for driving the upper worktable (2) longitudinally, characterized in that, It also includes an adjustment mechanism (5) for adjusting the parallelism between the upper worktable (2) and the lower worktable (3). The adjustment mechanism (5) includes a connecting shaft (51) installed at the bottom end of the drive shaft of the cylinder body (4), a ball head (52) provided at the bottom end of the connecting shaft (51), and a lifting flange (53) detachably connected to the upper end face of the upper worktable (2). The lifting flange (53) is sleeved on the connecting shaft (51) and movably connected to the outer edge of the connecting shaft (51). The upper worktable (2) is provided with a groove (6) for embedding the ball head (52). The inner wall of the groove (6) is provided with an arc-shaped surface.
2. The hydraulic press with adjustable worktable parallelism according to claim 1, characterized in that, An annular groove (9) is provided along its circumference on the outer edge surface of the connecting shaft (51), and an annular boss (8) that mates with the annular groove (9) is provided along its circumference on the inner wall of the top end of the lifting flange (53). The thickness of the annular boss (8) is less than the longitudinal height of the annular groove (9).
3. The hydraulic press with adjustable worktable parallelism according to claim 1 or 2, characterized in that, The groove (6) is provided with a ball head seat (7) that mates with the ball head (52), and the ball head seat (7) is interference-fitted in the groove (6).
4. The hydraulic press with adjustable worktable parallelism according to claim 3, characterized in that, The bottom edge of the outer edge of the ball head (52) is flat.
5. The hydraulic press with adjustable worktable parallelism according to claim 4, characterized in that, The bottom of the ball head seat (7) is provided with a through hole (11), the inner diameter of which is greater than the length of the bottom plane of the ball head (52).
6. The hydraulic press with adjustable worktable parallelism according to claim 4 or 5, characterized in that, The ball head (52) and the connecting shaft (51) are integrally formed.
7. The hydraulic press with adjustable worktable parallelism according to claim 6, characterized in that, The outer edge of the ball head (52) and the inner surface of the ball head seat (7) are both provided with a wear-resistant layer (10).
8. The hydraulic press with adjustable worktable parallelism according to claim 7, characterized in that, The upper end face of the upper workbench (2) is provided with a limiting groove (12) for limiting the lifting flange (53).