Hydraulic machine center cylinder return damping device

Abstract

The utility model provides a hydraulic machine center cylinder return damping device which comprises a fixing ring plate, an L-shaped limiting plate, a buffer block, a first limiting bolt and a spring. The damping device is provided with the damping block, and the damping block is provided with the inclined plane embedded with the bottom of the adjusting gland; when the adjusting gland descends, the damping block moves outwards, so that the descending speed of the adjusting gland is reduced, noise generated by collision between the adjusting gland and the machine table base is reduced, the situation that screws of the adjusting gland on the center cylinder are loosened due to vibration is reduced, and the situation that the product size is unstable due to the fact that a core rod slides downwards is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbing devices, in particular to a hydraulic press central cylinder retraction shock absorbing device. Background Art

[0002] The hydraulic presses currently used for powder compacting require a complete set of molds, including an upper punch, a cavity, a lower punch (a lower floating punch and a lower fixed punch), and a core rod; the core rod is controlled by the rise and fall of a center cylinder; due to structural reasons, some products have a large number of corresponding mold core rods, or the product itself requires a large pressure. In both cases, the core rod requires a large demoulding force; therefore, when the center cylinder of the existing hydraulic press descends, the adjusting cover will collide with the machine base to generate noise, and will loosen the screws of the adjusting cover on the center cylinder, causing the core rod to slide down and the product size to be unstable. Utility Model Content

[0003] The purpose of the utility model is to design a hydraulic press center cylinder retraction damping device to solve the problems raised by the background technology. To achieve the above purpose, the utility model provides the following technical solutions: including two fixed ring plates clamped on the machine base, a plurality of L-shaped limit plates fixedly connected to the top of the fixed ring plates, and a buffer block installed between the L-shaped limit plate and the machine base, the L-shaped limit plate is threadedly connected with a first limit bolt, the end of the first limit bolt passes through the L-shaped limit plate, a spring is sleeved on the outer circle of the first limit bolt, one end of the spring is connected to the L-shaped limit plate, and the other end of the spring is connected to the buffer block, and the buffer block is provided with an inclined surface that is engaged with the bottom of the regulating cover.

[0004] Furthermore, a second limiting bolt is threadedly connected to the top of the L-shaped limiting plate, and an end surface of the second limiting bolt is tightly attached to the buffer block.

[0005] Furthermore, the fixing ring plate is a semicircular plate, and a fixing ear is provided on the fixing ring plate, a fastening bolt is threadedly connected to the fixing ear, and the two fixing ring plates are connected by the fastening bolt.

[0006] Furthermore, the L-shaped limiting plate and the fixing ring plate are integrally formed.

[0007] Furthermore, each of the fixing ring plates is provided with an L-shaped limiting plate, and the L-shaped limiting plate is located in the middle of the fixing ring plate.

[0008] Furthermore, the buffer block is a copper block.

[0009] Furthermore, a boss is provided on the top of the buffer block, and a groove which is gap-matched with the boss is provided on the bottom of the L-shaped limiting plate.

[0010] Furthermore, the bottom of the L-shaped limiting plate is flush with the top of the machine base.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model is provided with a shock-absorbing block, and the shock-absorbing block is provided with an inclined surface engaged with the bottom of the adjusting cover; when the adjusting cover descends, the shock-absorbing block will move outward to reduce the descending speed of the adjusting cover, thereby reducing the noise generated by the collision between the adjusting cover and the machine base, reducing the situation where the screws of the adjusting cover on the center cylinder are loosened by vibration, and preventing the product size from being unstable due to the sliding of the core rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Among them: 1. Center cylinder; 2. Adjusting cover; 3. Second limit bolt; 4. Fixing bolt; 5. L-shaped limit plate; 6. Buffer block; 7. First limit bolt; 8. Machine base; 9. Fixing ear; 10. Fastening bolt; 11. Fixing ring plate. DETAILED DESCRIPTION

[0016] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0017] Example: Please refer to Figure 1, a hydraulic press center cylinder retraction damping device, comprising two fixing ring plates 11 clamped on the machine base 8, a plurality of L-shaped limit plates 5 fixedly connected to the top of the fixing ring plates 11 and a buffer block 6 installed between the L-shaped limit plate 5 and the machine base 8, a first limit bolt 7 is threadedly connected to the L-shaped limit plate 5, the end of the first limit bolt 7 passes through the L-shaped limit plate 5, a spring is sleeved on the outer circle of the first limit bolt 7, one end of the spring is connected to the L-shaped limit plate 5, and the other end of the spring is connected to the buffer block 6, and the buffer block 6 is provided with an inclined surface that is engaged with the bottom of the regulating gland 2; wherein, each fixing ring plate 11 is provided with an L-shaped limit plate 5, and the L-shaped limit plate 5 is located in the middle of the fixing ring plate 11, and the inclined surface is an arc-shaped inclined surface, It is convenient to cooperate with the adjusting cover 2; and the adjusting cover 2 is installed on the center cylinder 1 of the hydraulic press by the fixing bolts 4, so when the center cylinder 1 of the hydraulic press descends, the adjusting cover 2 moves downward, thereby engaging with the inclined surface in the buffer block 6; when the adjusting cover 2 continues to move downward, the buffer block 6 will move outward under the action of the spring, thereby reducing the impact of the descent of the adjusting cover 2, thereby reducing the noise generated by the collision between the adjusting cover 2 and the machine base 8, reducing the loosening of the screws of the adjusting cover 2 on the center cylinder 1, and preventing the unstable product size caused by the sliding of the core rod. In addition, the first limit bolt 7 plays a limiting role, and the displacement position of the buffer block 6 can be adjusted by adjusting the end depth of the first limit bolt 7 penetrating into the L-shaped limit plate 5.

[0018] In this embodiment, the top of the L-shaped limit plate 5 is threadedly connected with the second limit bolt 3, and the end face of the second limit bolt 3 is in close contact with the buffer block 6. A boss is provided on the top of the buffer block 6, and a groove is provided at the bottom of the L-shaped limit plate 5 that matches the gap with the boss, thereby improving the buffering capacity of the buffer block 6 while preventing the buffer block 6 from rotating; the fixing ring plate 11 is a semicircular plate, and a fixing ear 9 is provided on the fixing ring plate 11, and a fastening bolt 10 is threadedly connected to the fixing ear 9, and the two fixing ring plates 11 are connected by the fastening bolt 10; the L-shaped limit plate 5 and the fixing ring plate 11 are integrally formed, and the bottom of the L-shaped limit plate 5 is flush with the top of the machine base 8, which is convenient for the installation of the device; and the buffer block 6 is a copper block with low strength. On the one hand, it can improve the buffering capacity through slight deformation, and on the other hand, it can prevent the adjustment cover 2 from colliding with the buffer block 6 and deforming.

[0019] How it works

[0020] When the center cylinder 1 of the hydraulic press descends, the adjusting cover 2 moves downward, thereby engaging with the inclined surface in the buffer block 6; when the adjusting cover 2 continues to move downward, the buffer block 6 will move outward under the action of the spring, thereby mitigating the impact of the descending adjusting cover 2, thereby reducing the noise generated by the collision between the adjusting cover 2 and the machine base 8, reducing the loosening of the screws of the adjusting cover 2 on the center cylinder 1, and preventing the unstable product size caused by the sliding of the core rod.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0022] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hydraulic press center cylinder return shock absorbing device, characterized in that: The invention comprises two fixing ring plates (11) clamped on a machine base (8), a plurality of L-shaped limit plates (5) fixedly connected to the top of the fixing ring plates (11), and a buffer block (6) installed between the L-shaped limit plates (5) and the machine base (8), wherein a first limit bolt (7) is threadedly connected to the L-shaped limit plate (5), the end of the first limit bolt (7) passes through the L-shaped limit plate (5), a spring is sleeved on the outer circle of the first limit bolt (7), one end of the spring is connected to the L-shaped limit plate (5), and the other end of the spring is connected to the buffer block (6), and the buffer block (6) is provided with an inclined surface which is engaged with the bottom of the regulating cover (2).

2. The hydraulic press center cylinder return shock absorbing device according to claim 1 is characterized in that: The top of the L-shaped limiting plate (5) is threadedly connected to a second limiting bolt (3), and the end surface of the second limiting bolt (3) is in close contact with the buffer block (6).

3. The hydraulic press center cylinder return shock absorbing device according to claim 1 is characterized in that: The fixing ring plate (11) is a semicircular plate, and a fixing ear (9) is provided on the fixing ring plate (11), a fastening bolt (10) is threadedly connected to the fixing ear (9), and the two fixing ring plates (11) are connected via the fastening bolt (10).

4. The hydraulic press center cylinder return shock absorbing device according to claim 1 is characterized in that: The L-shaped limiting plate (5) and the fixing ring plate (11) are integrally formed.

5. The hydraulic press center cylinder return shock absorbing device according to claim 1 is characterized in that: An L-shaped limiting plate (5) is provided on each of the fixing ring plates (11), and the L-shaped limiting plate (5) is located in the middle of the fixing ring plate (11).

6. The hydraulic press center cylinder return shock absorbing device according to claim 1, characterized in that: The buffer block (6) is a copper block.

7. The hydraulic press center cylinder retraction damping device according to claim 1 is characterized in that: The top of the buffer block (6) is provided with a boss, and the bottom of the L-shaped limiting plate (5) is provided with a groove that is gap-matched with the boss.

8. The hydraulic press center cylinder return shock absorbing device according to claim 1, characterized in that: The bottom of the L-shaped limiting plate (5) is flush with the top of the machine base (8).

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