An oil hydraulic press

Abstract

The utility model relates to hydraulic mechanical technical field discloses an oil press, including lower crossbeam, stand, upper crossbeam, movable crossbeam and oil cylinder, movable crossbeam slidingly covers and sets up in the stand, and oil cylinder drives movable crossbeam movement, and the oil press still includes fixed mechanism and template, and the template is installed in movable crossbeam bottom and is opened with the slot, and the fixed mechanism includes fixed block, plug -in block, support, eccentric wheel and handle, and the fixed block is located in movable crossbeam bottom, and the plug -in block slidingly connects in the fixed block, and the support is fixed in the fixed block outside, and the eccentric wheel rotationally connects in the support and with plug -in block contact, and the handle connects eccentric wheel, and the oil press still includes guide mechanism, and the guide mechanism includes the guide sleeve fixed in movable crossbeam inner side. The utility model realizes the quick fixing of template through fixed mechanism, and the operation is simple, and through guide mechanism, the friction is reduced, and the accurate guidance is accurate, and the operation is stable.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic machinery technology, and in particular to an oil press. Background Technology

[0002] A hydraulic press is a pressure device widely used in the fields of machinery manufacturing and processing. A hydraulic press typically includes a frame, a movable crossbeam mounted on the frame, and a hydraulic cylinder that drives the movable crossbeam. During the operation of the hydraulic press, different templates or molds are usually installed at the bottom of the movable crossbeam to adapt to different workpiece processing requirements.

[0003] Existing template installation methods mostly rely on traditional bolt connections or pressure plate fixing. When templates need to be replaced frequently, the installation and disassembly process is very cumbersome, requiring a lot of time for alignment and tightening, which seriously affects the overall production efficiency.

[0004] Furthermore, the movable crossbeam needs to move up and down along the column at high speed or under high load under the drive of the hydraulic cylinder. The guiding accuracy and stability are crucial to the processing quality. Traditional hydraulic presses often use the guide hole of the movable crossbeam to directly cooperate with the column, or set a guide sleeve for sliding friction guidance. This sliding friction not only leads to high frictional resistance and high energy loss, but also causes guide gaps due to wear after long-term operation. The existence of guide gaps will cause the movable crossbeam to tilt or shake during the movement, reducing the processing accuracy. In severe cases, it may even cause jamming and affect the service life of the equipment.

[0005] Therefore, this utility model proposes a hydraulic press to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of inconvenient template installation and disassembly, low efficiency, low guiding accuracy of the moving crossbeam, high friction loss, and tilting and jamming in existing hydraulic presses, this utility model aims to provide a hydraulic press with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a hydraulic press, including: a lower crossbeam, a column vertically mounted on the lower crossbeam, an upper crossbeam fixed to the top of the column, a movable crossbeam slidably mounted on the column, and a hydraulic cylinder fixed to the top of the upper crossbeam with its output end fixed to the top of the movable crossbeam; as well as a fixing mechanism and a template. The template is installed at the bottom of the movable crossbeam and has a slot. Furthermore, the fixing mechanism includes a fixing block located at the bottom of the movable crossbeam, an insert block slidably connected inside the fixing block, the insert block corresponding to the slot, a bracket fixed to the outside of the fixing block, an eccentric wheel rotatably connected inside the bracket, the outer wall of the eccentric wheel contacting the outer side of the insert block, and a handle connected to the eccentric wheel.

[0008] Preferably, the hydraulic press further includes a guiding mechanism, which includes a guide sleeve fixed to the inner side of the movable crossbeam.

[0009] Preferably, the guide sleeve has limit rings fixed on the upper and lower sides, and the inner side of the limit ring has an annular groove. The inner wall of the annular groove is provided with a ball, and the ball contacts the outer wall of the column.

[0010] Preferably, the outer wall of the movable crossbeam is threaded with an adjusting bolt, and the end of the adjusting bolt is pressed against the guide sleeve.

[0011] Preferably, the top of the template is provided with a positioning hole, and the bottom end of the movable crossbeam is fixed with a positioning cone corresponding to the positioning hole.

[0012] Preferably, the handle can be operated to rotate the eccentric wheel, which presses the insert block into the slot.

[0013] Preferably, the eccentric wheel presses the insert into the slot and self-locks through friction.

[0014] Preferably, the output end of the hydraulic cylinder passes through the upper crossbeam.

[0015] This utility model has the following beneficial effects: 1. This utility model, by setting a fixing mechanism, uses a handle to operate the eccentric wheel to rotate, and the eccentric wheel presses the insert block into the slot of the template and locks itself, which solves the problems of complicated installation and disassembly of the template of the hydraulic press in the prior art, which is time-consuming, labor-intensive and inefficient. The template is quickly fixed, the operation is simple and the production efficiency is improved.

[0016] 2. This utility model, by setting a guiding mechanism, utilizes the limiting rings at both ends of the guide sleeve to cooperate with the ball bearings, so that rolling friction is formed between the movable crossbeam and the column, and an adjusting bolt is set to tighten the guide sleeve. This solves the problems of high friction loss between the movable crossbeam and the column, low guiding accuracy, and inability to adjust the gap leading to tilting and jamming in the prior art. It can reduce friction, run smoothly, guide accurately, eliminate gaps, and improve the rigidity and service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a perspective view of a hydraulic press proposed in this utility model; Figure 2 This is a partial structural exploded view of a hydraulic press proposed in this utility model; Figure 3 This is a schematic diagram of the fixing mechanism of a hydraulic press proposed in this utility model; Figure 4This is a partial structural diagram of a hydraulic press proposed in this utility model.

[0018] Legend: 1. Movable crossbeam; 2. Fixing mechanism; 201. Fixing block; 202. Bracket; 203. Eccentric wheel; 204. Handle; 205. Insert block; 206. Positioning cone; 207. Template; 208. Positioning hole; 209. Slot; 3. Guide mechanism; 301. Guide sleeve; 302. Limiting ring; 303. Ring groove; 304. Ball bearing; 305. Adjusting bolt; 4. Lower crossbeam; 5. Column; 6. Upper crossbeam; 7. Hydraulic cylinder. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0020] Please refer to Figures 1 to 4 This utility model embodiment provides a hydraulic press, including a lower crossbeam 4, columns 5 and an upper crossbeam 6. Multiple columns 5 are vertically arranged on the lower crossbeam 4, and the upper crossbeam 6 is fixed to the top of the multiple columns 5. The moving parts include a movable crossbeam 1 and a hydraulic cylinder 7 that drives the movable crossbeam 1 to move. The movable crossbeam 1 is slidably sleeved on the multiple columns 5 and located between the upper crossbeam 6 and the lower crossbeam 4. The hydraulic cylinder 7 is fixed to the top of the upper crossbeam 6, and the output end of the hydraulic cylinder 7 passes through the upper crossbeam 6 and is fixedly connected to the top of the movable crossbeam 1. The hydraulic cylinder 7 drives the movable crossbeam 1 to move up and down along the columns 5 to achieve rapid fixing of the template 207.

[0021] like Figure 3 As shown, a hydraulic press also includes a fixing mechanism 2 and a template 207. The template 207 is installed at the bottom of the movable crossbeam 1 and has a slot 209. The fixing mechanism 2 includes a fixing block 201, an insert block 205, a bracket 202, an eccentric wheel 203, and a handle 204. The fixing block 201 is fixed to the bottom of the movable crossbeam 1. The insert block 205 is slidably connected to the inner side of the fixing block 201 and is set to correspond to the slot 209 on the template 207. The bracket 202 is fixed to the outer side of the fixing block 201. The eccentric wheel 203 is rotatably connected to the inner side of the bracket 202 and the outer wall of the eccentric wheel 203 contacts the outer side of the insert block 205. The handle 204 is connected to the eccentric wheel 203 and is used to operate the eccentric wheel 203 to rotate. This is to improve the guiding accuracy and wear resistance of the movable crossbeam 1.

[0022] like Figure 4 As shown, a hydraulic press also includes a guide mechanism 3, which includes a guide sleeve 301 fixed to the inside of the movable crossbeam 1.

[0023] Please refer to Figure 3 Template 207 is installed at the bottom of movable crossbeam 1. To achieve quick alignment before installation, a positioning hole 208 is provided on the top of template 207, and a positioning cone 206 is fixed at the bottom of movable crossbeam 1. During installation, the positioning hole 208 of template 207 is first aligned with the positioning cone 206 of movable crossbeam 1 to achieve preliminary radial positioning. Fixing mechanism 2 is used to achieve final locking of template 207. Fixing mechanism 2 includes fixing block 201, bracket 202, eccentric wheel 203, handle 204 and insert block 205. Fixing blocks 201 are fixedly connected to the bottom of movable crossbeam 1 around the perimeter. Each fixing block 201 has a groove on its inner side to slide the insert block 205. Slots 209 are provided around template 207, and the position of each insert block 205 corresponds to the position of the slot 209 around template 207. Correspondingly, a bracket 202 is fixedly connected to the outer side of the fixing block 201. An eccentric wheel 203 is rotatably connected to the inner side of the bracket 202 via a rotating shaft. A handle 204 is connected to the eccentric wheel 203. The outer wall of the eccentric wheel 203 is in contact with the outer side of the insert block 205. When it is necessary to fix the template 207, first align the insert block 205 with the slot 209, and then pull the handle 204. The handle 204 drives the eccentric wheel 203 to rotate around the rotating shaft. When the eccentric wheel 203 rotates, the outer wall of the eccentric wheel 203 will squeeze the insert block 205 by the change of eccentricity, and push the insert block 205 to slide inward and forcefully insert it into the slot 209. The eccentric structure of the eccentric wheel 203 and the friction between the insert block 205 and the slot 209 achieve self-locking, thereby completing the quick fixing of the template 207. The operation is simple and the locking is reliable.

[0024] Please refer to Figure 2 and Figure 4In a preferred embodiment, the hydraulic press further includes a guide mechanism 3. The guide mechanism 3 ensures that the movable crossbeam 1 moves vertically and smoothly along the column 5. The guide mechanism 3 includes a guide sleeve 301, which is fixed to the inner wall of the inner hole through which the movable crossbeam 1 passes. The movable crossbeam 1 forms a precision contact with the outer wall of the column 5 through the inner wall of the guide sleeve 301. In order to convert sliding friction into rolling friction and reduce friction loss, limit rings 302 are fixedly connected to both the upper and lower sides of the guide sleeve 301. An annular groove 303 is formed on the inner side of the limit ring 302, i.e., the side wall facing the column 5. A plurality of balls 304 are densely arranged around the inner wall of the annular groove 303. The diameter is slightly larger than the opening width of the annular groove 303, allowing the ball bearing 304 to roll freely and contact the outer wall of the column 5. The upper and lower sets of limiting rings 302 and the ball bearing 304 together disperse the radial force on the movable crossbeam 1 during movement, ensuring that the movement trajectory of the movable crossbeam 1 is strictly parallel to the column 5, avoiding tilting and jamming. In addition, to eliminate the guide gap that appears after long-term use, an adjusting bolt 305 is threaded on the outer wall of the movable crossbeam 1. The end of the adjusting bolt 305 passes through the wall thickness of the movable crossbeam 1 and radially presses against the outer wall of the guide sleeve 301. By adjusting the screw depth of the adjusting bolt 305, a preload can be applied to the guide sleeve 301 to prevent gaps between the guide sleeve 301 and the column 5.

[0025] Preferably, the adjusting bolt 305 is configured to tighten the guide sleeve 301 from two mutually perpendicular directions to improve the stability of adjustment and the locking effect, such as... Figure 1 As shown, a through hole is provided at the center of the upper crossbeam 6, and the output end of the oil cylinder 7 passes through the through hole of the upper crossbeam 6 and is fixedly connected to the top center of the movable crossbeam 1.

[0026] Working principle: When the hydraulic cylinder 7 is working, its output end is fixedly connected to the top of the movable crossbeam 1. The output end of the hydraulic cylinder 7 drives the movable crossbeam 1 to reciprocate up and down along the column 5 to achieve the pressing action. During the up and down movement of the movable crossbeam 1, the movable crossbeam 1 slides onto the column 5. The inner wall of the guide sleeve 301 fixed on the inner side of the movable crossbeam 1 contacts and slides with the outer wall of the column 5. The guide sleeve 301 is set to limit the radial displacement of the movable crossbeam 1 during the movement. In order to further reduce friction loss and improve guiding accuracy, limit rings 302 are fixed on the upper and lower sides of the guide sleeve 301. The inner side of the limit ring 302 is provided with an annular groove 303. The inner wall of the annular groove 303 is provided with a ball 304. The ball 304 contacts the outer wall of the column 5. When the movable crossbeam 1 moves, the ball 304 rolls on the outer wall of the column 5, converting the sliding friction between the movable crossbeam 1 and the column 5. The friction is changed to rolling friction, which significantly reduces friction loss. The combination design of the upper and lower limit rings 302 and the ball 304 in the guide mechanism 3 can effectively disperse the radial force on the movable crossbeam 1 during high-speed or high-load movement, ensuring that the movement trajectory of the movable crossbeam 1 is always parallel to the column 5, and preventing tilting or jamming during movement. After the equipment is installed, debugged or used for a long time, if a gap is generated between the guide sleeve 301 and the column 5 due to wear, the operator can compensate by adjusting the bolt 305. The adjusting bolt 305 is threaded to the outer wall of the movable crossbeam 1. By rotating the adjusting bolt 305, the end of the adjusting bolt 305 will radially press against the guide sleeve 301. Preferably, the guide sleeve 301 is pressed against from two directions, which can apply a preload to the guide sleeve 301, thereby eliminating the harmful gap between the guide sleeve 301 and the column 5, and further ensuring the rigidity and accuracy of the guide. When it is necessary to install or replace template 207, the operator first aligns the positioning hole 208 on the top of template 207 with the positioning cone 206 fixed at the bottom of the movable crossbeam 1. This step achieves the initial quick positioning of template 207. Subsequently, the operator pulls the handle 204 of the fixing mechanism 2. The handle 204 is connected to an eccentric wheel 203. Pulling the handle 204 causes the eccentric wheel 203 to rotate around the fulcrum. The eccentric wheel 203 is rotatably connected inside the bracket 202. The bracket 202 is fixed to the outside of the fixing block 201. The fixing block 201 is fixed to the bottom of the movable crossbeam 1. The outer wall of 203 is always in contact with the outer side of the insert 205. The insert 205 is slidably connected to the inner side of the fixed block 201. When the eccentric wheel 203 rotates, the outer wall of the eccentric wheel 203 uses the eccentricity to squeeze the insert 205, forcing the insert 205 to slide inward and forcefully insert into the slots 209 opened around the template 207. After the insert 205 is inserted into the slot 209, the cam structure of the eccentric wheel 203 and the friction of the insert 205 achieve self-locking, thereby firmly and quickly fixing the template 207 to the movable crossbeam 1. The whole process does not require complicated tools, which improves work efficiency.

Claims

1. A hydraulic press, comprising: The lower crossbeam (4), the column (5) vertically mounted on the lower crossbeam (4), the upper crossbeam (6) fixed to the top of the column (5), the movable crossbeam (1) slidably mounted on the column (5), and the oil cylinder (7) fixed to the top of the upper crossbeam (6) and whose output end is fixed to the top of the movable crossbeam (1). The invention is characterized by further including a fixing mechanism (2) and a template (207), wherein the template (207) is installed at the bottom of the movable crossbeam (1) and has a slot (209), the fixing mechanism (2) includes a fixing block (201) provided at the bottom of the movable crossbeam (1), an insert (205) is slidably connected in the fixing block (201), the insert (205) corresponds to the slot (209), a bracket (202) is fixed on the outside of the fixing block (201), an eccentric wheel (203) is rotatably connected in the bracket (202), the outer wall of the eccentric wheel (203) contacts the outer side of the insert (205), and a handle (204) is connected to the eccentric wheel (203).

2. The hydraulic press according to claim 1, characterized in that, It also includes a guide mechanism (3), which includes a guide sleeve (301) fixed to the inside of the movable crossbeam (1).

3. A hydraulic press according to claim 2, characterized in that, The guide sleeve (301) has a limit ring (302) fixed on its upper and lower sides. The limit ring (302) has an annular groove (303) on its inner side. The annular groove (303) has a ball (304) on its inner wall. The ball (304) contacts the outer wall of the column (5).

4. A hydraulic press according to claim 2, characterized in that, The outer wall of the movable crossbeam (1) is threaded with an adjusting bolt (305), and the end of the adjusting bolt (305) is pressed against the guide sleeve (301).

5. A hydraulic press according to claim 1, characterized in that, The template (207) has a positioning hole (208) at the top, and the bottom end of the movable crossbeam (1) is fixed with a positioning cone (206) corresponding to the positioning hole (208).

6. A hydraulic press according to claim 1, characterized in that, The handle (204) can be operated to rotate the eccentric wheel (203), which presses the insert (205) into the slot (209).

7. A hydraulic press according to claim 6, characterized in that, The eccentric wheel (203) presses the insert (205) into the slot (209) and self-locks through friction.

8. A hydraulic press according to claim 1, characterized in that, The output end of the hydraulic cylinder (7) passes through the upper crossbeam (6).

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