Handheld portable electric hydraulic bar bending machine

Abstract

A handheld portable electric hydraulic bar bending machine comprises an oil cylinder, a piston arranged in the oil cylinder and a pressure gathering groove formed in the center of the side wall of the left side of the piston, the side wall of the left side of the piston is attached to the inner wall of the left side of the oil cylinder, an oil hole communicated with the pressure gathering groove is formed in the outer wall of the piston, and the left portion of the oil cylinder is sleeved with a handle shell matched with the oil cylinder. A fixing seat is arranged in the handle shell, and the outer wall of the left side of the oil cylinder is attached to the right end face of the fixing seat; a limiting groove is formed in the center of the inner wall of the left side of the oil cylinder. A through hole communicated with the limiting groove is formed in the center of the outer wall of the left side of the oil cylinder; a fastening screw hole coaxial with the penetrating hole is formed in the right end face of the fixing base. The handheld portable electric hydraulic bar bending machine can be moved easily, straight pipes in different places can be bent conveniently, the bending requirements of the straight pipes of different sizes can be met, and the overall bending efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to a bending machine, in particular to a handheld portable electric hydraulic bending machine. Background Art

[0002] An electric hydraulic tube bending machine is an electric hydraulic device that can bend straight tubes into curved tubes. The traditional electric hydraulic tube bending machine has a fuselage as the main body, and the tube bending mechanism is arranged on the upper surface of the fuselage. After the straight tube to be bent is fixed on the upper surface of the fuselage, the straight tube will be bent by the pressure of the hydraulic oil of the tube bending mechanism, and finally bent into the actually required curved tube. Although this tube bending method can achieve the bending of straight tubes, it is inconvenient to move due to the large size of the electric hydraulic tube bending machine. In the actual bending process, if the position of the electric hydraulic tube bending machine cannot be moved, a large number of straight tubes that need to be bent can only be transported to the position of the electric hydraulic tube bending machine, and then transported to other places after bending, which makes the entire material transfer process extremely troublesome and seriously increases the workload.

[0003] In the actual bending process, since there are many types of straight tubes that need to be bent, the sizes of different types of straight tubes are also different. The size of the arc-shaped groove of the bending part used for applying pressure by the traditional electric hydraulic bending machine cannot be changed. Therefore, if a straight tube that does not meet the size of the arc-shaped groove is inserted into the arc-shaped groove, it is very easy for the straight tube to slip during the bending process, affecting the bending quality.

[0004] Moreover, after the traditional electric hydraulic bending machine uses the hydraulic pressure of the cylinder of the bending mechanism to complete the bending work, it only uses the oil circuit pressure relief to complete the reset of the piston in the cylinder, resulting in a relatively slow reset efficiency. The next bending work can only be carried out after the piston in the cylinder is reset, which ultimately affects the overall bending efficiency. Summary of the invention

[0005] The utility model aims to solve the existing technical problem by providing a handheld portable electric hydraulic bending machine, which can not only move itself easily and facilitate bending of straight pipes in different places, but also meet the bending requirements of straight pipes of different sizes and effectively improve the overall bending efficiency.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] The utility model discloses a handheld portable electric hydraulic bending machine, comprising an oil cylinder, a piston arranged in the oil cylinder and a pressure-gathering groove arranged at the center of the left side wall of the piston, the left side wall of the piston is fitted with the left inner wall of the oil cylinder, the outer wall of the piston is provided with an oil hole which is connected with the pressure-gathering groove, the left part of the oil cylinder is covered with a handle shell which matches it; a fixing seat is arranged in the handle shell, the left outer wall of the oil cylinder is fitted with the right end face of the fixing seat; a limiting groove is arranged at the center of the left inner wall of the oil cylinder; a through hole which is connected with the limiting groove is arranged at the center of the left outer wall of the oil cylinder; a fastening screw hole which is coaxial with the through hole is arranged on the right end face of the fixing seat; a fastening screw passes through the left side A hole is formed through the hole and screwed into the fastening screw hole, and the head of the fastening screw fits into the bottom of the limiting groove; a fixed cylinder is provided on the right side of the oil cylinder; a screw hole is provided at the center of the left side wall of the fixed cylinder, and the right end of the oil cylinder is screwed into the screw hole; an elastic hole is provided at the center of the bottom of the screw hole; a telescopic hole communicating with the elastic hole is provided at the center of the right side wall of the fixed cylinder, and the diameter of the telescopic hole is smaller than the diameter of the elastic hole; an opening communicating with the internal space thereof is provided on the right outer wall of the oil cylinder; a bending device matching with the telescopic hole is provided between the right side wall of the piston and the bottom of the elastic hole; a material fixing device matching with the bending device is provided at the lower part of the right end surface of the fixed cylinder.

[0008] The material fixing device includes a clamp head seat plate arranged at the lower part of the right end surface of the fixed cylinder; symmetrical clamp heads are arranged on the front and rear sides of the right part of the clamp head seat plate; a support arm extends to the left from the upper end of the clamp head; a pressure block is arranged between the lower surface of the support arm and the upper surface of the clamp head seat plate; an arc-shaped pressure groove is arranged on the left side wall of the pressure block.

[0009] The pressure block is provided with an assembly hole that passes through it longitudinally; the upper surface of the clamp head base plate is provided with a fixing screw hole coaxial with the assembly hole; the upper surface of the support arm is provided with a countersunk hole that penetrates the assembly hole; a fixing screw passes through the countersunk hole and the assembly hole in sequence downward and is screwed into the fixing screw hole, and the support arm presses the pressure block onto the upper surface of the clamp head base plate.

[0010] The bending device includes a push rod arranged between the piston and the bottom of the elastic hole, and the right end of the push rod is inserted into the telescopic hole; a positioning groove is provided in the center of the right end face of the piston; a positioning portion matching the positioning groove is provided on the outer wall of the left end of the push rod; a positioning hole is provided in the center of the left end face of the push rod; a through hole is provided in the center of the bottom of the positioning hole; a connecting hole that penetrates the through hole is provided on the right end face of the push rod, and the diameter of the connecting hole is larger than the diameter of the through hole; a connecting screw is inserted into the connecting hole to the right through the through hole, and the right side wall of the head of the connecting screw is fitted with the bottom of the positioning hole; the right end of the connecting screw is externally threaded with a matching top head, and the left end face of the top head is fitted with the bottom of the connecting hole; the top head is connected to a bending piece matching it; the right side wall of the bending piece is provided with an arc-shaped groove.

[0011] The left end of the top head is screwed to the outside of the right end of the connecting screw; the left side wall of the bending part is provided with a quick-release hole coaxial with the top head; the right end of the top head is inserted into the quick-release hole to the right; the outer wall of the top head is provided with a guide part located between the right end surface of the fixed cylinder and the left side wall of the bending part; the lower surface of the guide part is provided with a guide plane that fits with the upper surface of the clamp head seat plate; the upper surface of the bending part is provided with a limiting hole that penetrates the quick-release hole; the outer wall of the right end of the top head is provided with an annular groove corresponding to the position of the limiting hole; a butterfly screw is screwed to the limiting hole and pressed against the inner circumference of the annular groove.

[0012] The right side wall of the positioning part is coplanar with the right end surface of the piston; a spring set outside the push rod is arranged between the right side wall of the positioning part and the bottom of the elastic hole.

[0013] The inner wall of the telescopic hole is provided with an annular right sealing groove; a right sealing ring matching the right sealing groove is provided in the right sealing groove; the outer wall of the piston is provided with an annular left sealing groove; a left sealing ring matching the left sealing groove is provided in the left sealing groove.

[0014] The left and right ends of the handle shell are both provided with binding belt connectors.

[0015] The beneficial effects of the utility model are:

[0016] Compared with the prior art, the handle shell of the handheld portable electric hydraulic bending machine adopting the structure of the utility model is convenient for users to hold, thereby achieving a portable effect. At this time, there is no need to move the straight pipe to the position of the electric hydraulic bending machine. The user can directly carry the electric hydraulic bending machine to the position of the straight pipe by holding it, which effectively reduces the trouble of moving the straight pipe, saves a lot of time, and effectively improves the overall bending efficiency.

[0017] Compared with the prior art, the handheld portable electric hydraulic bending machine adopting the structure of the utility model can realize the rapid disassembly and assembly of the bending parts through the butterfly screw and the annular groove on the top head, so as to facilitate the replacement of the bending parts with arc grooves of different sizes to meet the needs of straight pipes of different sizes, and ensure that the bending parts can perform stable bending on straight pipes of different sizes.

[0018] Compared with the prior art, a set of springs outside the push rod is provided between the right side wall of the positioning part of the handheld portable electric hydraulic bending machine adopting the structure of the utility model and the bottom of the elastic hole. When the piston pushes the push rod to the right, the spring will be compressed synchronously. At this time, the spring generates elasticity. When the piston is reset, the elasticity of the spring can help the piston to reset, effectively improving the reset efficiency of the piston and starting the next bending work faster, thereby further improving the overall bending efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a cross-sectional view of the handheld portable electric hydraulic bending machine of the utility model;

[0020] Figure 2 yes Figure 1 An enlarged view of part A;

[0021] Figure 3 yes Figure 1 An enlarged view of part B;

[0022] Figure 4 This is a schematic diagram of the structure of the handheld portable electric hydraulic bending machine of the utility model;

[0023] Figure 5 It is a structural schematic diagram of a dosing device;

[0024] Figure 6 It is a three-dimensional diagram of the handheld portable electric hydraulic bending machine of the utility model. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0026] See also Figures 1 to 6 The utility model provides a handheld portable electric hydraulic bending machine, comprising an oil cylinder 1, a piston 2 arranged in the oil cylinder 1, and a pressure-collecting groove 3 arranged at the center of the left side wall of the piston 2, the left side wall of the piston 2 is fitted with the left inner wall of the oil cylinder 1, and the outer wall of the piston 2 is provided with an oil hole that penetrates the pressure-collecting groove 3, and the left outer cover of the oil cylinder 1 is provided with a handle shell 5 that matches it; a fixing seat 6 is provided in the handle shell 5, and the left outer wall of the oil cylinder 1 is fitted with the right end face of the fixing seat 6; a limiting groove 7 is provided at the center of the left inner wall of the oil cylinder 1; a through hole 8 that penetrates the limiting groove 7 is provided at the center of the left outer wall of the oil cylinder 1; a fastening screw hole 9 coaxial with the through hole 8 is provided on the right end face of the fixing seat 6; a fastening screw 10 passes through the through hole 8 to the left and is screwed In the fastening screw hole 9, the head of the fastening screw 10 fits with the bottom of the limiting groove 7; a fixed cylinder 11 is provided on the right side of the oil cylinder 1; a screw hole 12 is provided at the center of the left side wall of the fixed cylinder 11, and the right end of the oil cylinder 1 is screwed into the screw hole 12; an elastic hole 13 is provided at the center of the bottom of the screw hole 12; a telescopic hole 14 is provided at the center of the right side wall of the fixed cylinder 11, which is connected with the elastic hole 13, and the diameter of the telescopic hole 14 is smaller than the diameter of the elastic hole 13; an opening 15 is provided on the right outer wall of the oil cylinder 1, which is connected with its internal space; a bending device matching the telescopic hole 14 is provided between the right side wall of the piston 2 and the bottom of the elastic hole 13; a material fixing device matching the bending device is provided at the lower part of the right end surface of the fixed cylinder 11.

[0027] The material setting device includes a clamp head seat plate 16 arranged at the lower part of the right end surface of the fixed cylinder 11; the front and rear sides of the right part of the clamp head seat plate 16 are provided with symmetrical clamp heads 17; a support arm 18 extends to the left from the upper end of the clamp head 17; a pressure block 19 is provided between the lower surface of the support arm 18 and the upper surface of the clamp head seat plate 16; the left side wall of the pressure block 19 is provided with an arc-shaped pressure groove 20.

[0028] The pressure block 19 is provided with an assembly hole 21 which passes through the pressure block 19 longitudinally; the upper surface of the clamp head base plate 16 is provided with a fixing screw hole 22 which is coaxial with the assembly hole 21; the upper surface of the support arm 18 is provided with a countersunk hole 23 which is in communication with the assembly hole 21; a fixing screw 24 passes downward through the countersunk hole 23 and the assembly hole 21 in sequence and is screwed into the fixing screw hole 22, and the support arm 18 presses the pressure block 19 onto the upper surface of the clamp head base plate 16.

[0029] The bending device includes a push rod 25 arranged between the piston 2 and the bottom of the elastic hole 13, and the right end of the push rod 25 penetrates into the telescopic hole 14; a positioning groove 26 is provided at the center of the right end face of the piston 2; a positioning portion 27 matching the positioning groove 26 is provided on the outer wall of the left end of the push rod 25; a positioning hole 28 is provided at the center of the left end face of the push rod 25; a through hole 29 is provided at the center of the bottom of the positioning hole 28; a connecting hole 29 is provided on the right end face of the push rod 25 Hole 30, the diameter of the connecting hole 30 is larger than the diameter of the through hole 29; a connecting screw 31 passes through the through hole 29 to the right and enters the connecting hole 30, and the right side wall of the head of the connecting screw 31 fits with the bottom of the positioning hole 28; the right end of the connecting screw 31 is externally threaded with a matching top head 32, and the left end face of the top head 32 fits with the bottom of the connecting hole 30; the top head 32 is connected to a matching bending piece 33; the right side wall of the bending piece 33 is provided with an arc-shaped groove 34.

[0030] The left end of the top head 32 is screwed to the outside of the right end of the connecting screw 31; the left side wall of the bending piece 33 is provided with a quick-release hole 35 coaxial with the top head 32; the right end of the top head 32 is inserted into the quick-release hole 35 to the right; the outer wall of the top head 32 is provided with a guide portion 36 located between the right end surface of the fixing cylinder 11 and the left side wall of the bending piece 33; the lower surface of the guide portion 36 is provided with a guide plane 37 that fits with the upper surface of the clamp head seat plate 16; the upper surface of the bending piece 33 is provided with a limiting hole 38 that penetrates the quick-release hole 35; the outer wall of the right end of the top head 32 is provided with an annular groove 39 corresponding to the position of the limiting hole 38; a butterfly screw 40 is screwed to the limiting hole and pressed against the inner circumference of the annular groove 39.

[0031] The right side wall of the positioning portion 27 is coplanar with the right end surface of the piston 2 ; a spring 41 is provided between the right side wall of the positioning portion 27 and the bottom of the elastic hole 13 and is arranged outside the push rod.

[0032] The inner wall of the telescopic hole 14 is provided with an annular right sealing groove 42; a right sealing ring 43 matching therewith is arranged in the right sealing groove 42; the outer wall of the piston 2 is provided with an annular left sealing groove 44; a left sealing ring 45 matching therewith is arranged in the left sealing groove 44.

[0033] The left and right ends of the handle housing 5 are both provided with binding belt connectors 46 .

[0034] The method of using the utility model is as follows:

[0035] The presence of the handle shell 5 makes it easy for users to hold it, thus achieving a portable effect. At this time, there is no need to move the straight pipe to the location of the electric hydraulic bending machine. The user can directly carry the electric hydraulic bending machine to the location of the straight pipe by holding it, which effectively reduces the trouble of moving the straight pipe, saves a lot of time, and effectively improves the overall bending efficiency.

[0036] When the straight pipe needs to be bent, the straight pipe can be placed between the bending piece 33 and the pressing block 19. As the hydraulic oil of the electric hydraulic bending machine enters the pressure collecting groove 3 through the oil hole, the pressure of the hydraulic oil will push the piston 2 to the right. At this time, the piston 2 will push the push rod 25 to the right. When the push rod 25 moves to the right, the push head 32 will move the bending piece 33 to the right synchronously. As the bending piece 33 moves to the right to a certain degree, the middle part of the straight pipe between the bending piece 33 and the pressing block 19 is embedded in the arc-shaped groove 34 of the bending piece 33, and the front and rear ends of the straight pipe are embedded in the pressure grooves on the front and rear sides. The pressing groove 20 of the block 19 is then driven by the push rod 25 to continue to drive the bending piece 33 to move right. When the pressing block 19 can rotate around the fixing screw 24, the middle part of the straight tube will gradually bend under the pressure of the bending piece 33, while ensuring the smoothness of the bending process, avoiding the situation where the front and rear ends of the straight tube are restricted by the pressing block 19 when bending, and finally completing the work of bending the straight tube into a curved tube. When the straight tube is bent into the curved tube actually required, the hydraulic oil between the left end face of the piston 2 and the right inner wall of the cylinder 1 can be depressurized, thereby realizing the resetting of the piston 2.

[0037] If it is found that the size of the arc groove of the bending piece 33 does not match the size of the straight tube when bending the straight tube, the bending piece 33 can be replaced with a bending piece 33 having an arc groove 34 that matches the size of the straight tube. When the bending piece 33 needs to be replaced, the butterfly screw 40 can be rotated to move the butterfly screw 40 upward and remove it from the annular groove 39. At this time, the butterfly screw 40 no longer restricts the forward and backward movement of the bending piece 33. Only the bending piece 33 needs to be pulled to the right to separate the bending piece 33 from the top head 32, and then the new bending piece 33 can be fixed to the top head with the butterfly screw 40. This fixing method can realize the rapid disassembly and assembly of the bending piece 33, thereby facilitating the replacement of the bending piece 33 with arc grooves 34 of different sizes to meet the needs of straight tubes of different sizes and ensure that the bending piece 33 can face straight tubes of different sizes and can perform stable bending.

[0038] The right side wall of the positioning portion 27 is coplanar with the right end face of the piston 2. A set of springs 41 outside the push rod 25 is provided between the right side wall of the positioning portion 27 and the bottom of the elastic hole 13. When the piston 2 pushes the push rod 25 to the right, the spring 41 will be compressed synchronously. At this time, the spring 41 generates elasticity. When the piston 2 is reset, the elasticity of the spring 41 can help the piston 2 to reset, effectively improving the reset efficiency of the piston 2, and starting the next bending work faster, thereby further improving the overall bending efficiency.

[0039] The inner wall of the telescopic hole 14 is provided with an annular right sealing groove 42, and a right sealing ring 43 matching therewith is arranged in the right sealing groove 42; the outer wall of the piston 2 is provided with an annular left sealing groove 44, and a left sealing ring 45 matching therewith is arranged in the left sealing groove 44; the existence of the right sealing ring 43 can effectively ensure the sealing between the outer wall of the push rod 25 and the inner wall of the telescopic hole 14; the existence of the left sealing ring 45 can effectively ensure the sealing between the outer wall of the piston 2 and the inner wall of the oil cylinder 1, and effectively avoid the situation where oil leakage affects the pressure of the bending part 33.

[0040] Both the left and right ends of the handle shell 5 are provided with binding belt connectors 46, and the binding belt connectors 46 on the left and right sides can be connected by a binding belt. When the user holds the handle shell 5, the hand can be passed through the gap between the inner wall of the binding belt and the outer wall of the handle shell 5 at the same time, and the binding force of the binding belt can be used to further restrict the hand on the handle shell 5, thereby improving the stability of the user when holding the electric hydraulic bending machine.

Claims

1. A portable electric hydraulic bending machine, comprising an oil cylinder, a piston arranged in the oil cylinder, and a pressure-collecting groove arranged at the center of the left side wall of the piston, the left side wall of the piston is in contact with the left inner wall of the oil cylinder, and the outer wall of the piston is provided with an oil hole that is connected with the pressure-collecting groove, characterized in that: The left side of the oil cylinder is covered with a handle shell that matches it; a fixing seat is arranged inside the handle shell, and the left outer wall of the oil cylinder fits with the right end face of the fixing seat; a limiting groove is arranged at the center of the left inner wall of the oil cylinder; a through hole that penetrates the limiting groove is arranged at the center of the left outer wall of the oil cylinder; a fastening screw hole coaxial with the through hole is arranged on the right end face of the fixing seat; a fastening screw passes through the through hole to the left and is screwed into the fastening screw hole, and the head of the fastening screw fits with the bottom of the limiting groove; a fixing cylinder is arranged on the right side of the oil cylinder; A screw hole is provided at the center of the left side wall of the fixed cylinder, and the right end of the oil cylinder is screwed into the screw hole; an elastic hole is provided at the center of the bottom of the screw hole; a telescopic hole is provided at the center of the right side wall of the fixed cylinder and is connected with the elastic hole, and the diameter of the telescopic hole is smaller than the diameter of the elastic hole; an opening is provided on the right outer wall of the oil cylinder and is connected with its internal space; a bending device matching the telescopic hole is provided between the right side wall of the piston and the bottom of the elastic hole; a material fixing device matching the bending device is provided at the lower part of the right end surface of the fixed cylinder.

2. A portable electric hydraulic bending machine according to claim 1, characterized in that: The material fixing device includes a clamp head seat plate arranged at the lower part of the right end surface of the fixed cylinder; symmetrical clamp heads are arranged on the front and rear sides of the right part of the clamp head seat plate; a support arm extends to the left from the upper end of the clamp head; a pressure block is arranged between the lower surface of the support arm and the upper surface of the clamp head seat plate; an arc-shaped pressure groove is arranged on the left side wall of the pressure block.

3. A portable electric hydraulic bending machine according to claim 2, characterized in that: The pressure block is provided with an assembly hole that passes through it longitudinally; the upper surface of the clamp head base plate is provided with a fixing screw hole coaxial with the assembly hole; the upper surface of the support arm is provided with a countersunk hole that penetrates the assembly hole; a fixing screw passes through the countersunk hole and the assembly hole in sequence downward and is screwed into the fixing screw hole.

4. A portable electric hydraulic bending machine according to claim 2, characterized in that: The bending device includes a push rod arranged between the piston and the bottom of the elastic hole, and the right end of the push rod is inserted into the telescopic hole; a positioning groove is provided in the center of the right end face of the piston; a positioning portion matching the positioning groove is provided on the outer wall of the left end of the push rod; a positioning hole is provided in the center of the left end face of the push rod; a through hole is provided in the center of the bottom of the positioning hole; a connecting hole that penetrates the through hole is provided on the right end face of the push rod, and the diameter of the connecting hole is larger than the diameter of the through hole; a connecting screw is inserted into the connecting hole to the right through the through hole, and the right side wall of the head of the connecting screw is fitted with the bottom of the positioning hole; the right end of the connecting screw is externally threaded with a matching top head, and the left end face of the top head is fitted with the bottom of the connecting hole; the top head is connected to a bending piece matching it; the right side wall of the bending piece is provided with an arc-shaped groove.

5. A portable electric hydraulic bending machine according to claim 4, characterized in that: The left end of the top head is screwed to the outside of the right end of the connecting screw; the left side wall of the bending part is provided with a quick-release hole coaxial with the top head; the right end of the top head is inserted into the quick-release hole to the right; the outer wall of the top head is provided with a guide part located between the right end surface of the fixed cylinder and the left side wall of the bending part; the lower surface of the guide part is provided with a guide plane that fits with the upper surface of the clamp head seat plate; the upper surface of the bending part is provided with a limiting hole that penetrates the quick-release hole; the outer wall of the right end of the top head is provided with an annular groove corresponding to the position of the limiting hole; a butterfly screw is screwed to the limiting hole and pressed against the inner circumference of the annular groove.

6. A portable electric hydraulic bending machine according to claim 4, characterized in that: The right side wall of the positioning part is coplanar with the right end surface of the piston; a spring set outside the push rod is arranged between the right side wall of the positioning part and the bottom of the elastic hole.

7. A portable electric hydraulic bending machine according to claim 6, characterized in that: The inner wall of the telescopic hole is provided with an annular right sealing groove; a right sealing ring matching the right sealing groove is provided in the right sealing groove; the outer wall of the piston is provided with an annular left sealing groove; a left sealing ring matching the left sealing groove is provided in the left sealing groove.

8. The portable electric hydraulic bending machine according to claim 1, characterized in that: The left and right ends of the handle shell are both provided with binding belt connectors.

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