Portable hydraulic manual pump

Abstract

The invention discloses a hydraulic manual pump convenient to carry, and relates to the technical field of hydraulic manual pumps, the hydraulic manual pump comprises a manual pump main body, the left end of the manual pump main body is fixedly provided with a liquid guide pipeline, and the liquid guide pipeline can be bent to the position above the manual pump main body; the two buckle assemblies are fixed to the two ends of the outer side of the liquid guiding pipeline correspondingly and can be buckled to the outer side of the manual pump body. The number of the straps is two, the two ends of the straps are connected with the two buckle assemblies respectively, and when the manual pump body is carried, the two straps are staggered to wind the manual pump body on the back of a carrier; according to the hydraulic manual pump, the buckle assembly is buckled on the outer side of the manual pump body, the manual pump body and the liquid guide pipeline are fixed together, the strap is wound on the outer side of the pump body firstly when being carried, the hydraulic manual pump is fixed into a whole after being carried, and then the hydraulic manual pump is carried on the back of a carrier.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic manual pump, in particular to a hydraulic manual pump convenient to carry. BACKGROUND

[0002] Manual pump is a kind of pump using manual force. One-way manual oil pump is a kind of small hydraulic pump station that converts manual mechanical energy into hydraulic energy. In the case of using matched oil cylinder and special tools, various operations can be carried out, such as lifting, bending, straightening, shearing, riveting, assembling, disassembling and some construction and military construction.

[0003] Since the manual pump is not very large in size but long in length, it is inconvenient to carry the manual pump, and the manual pump can only be held up. The weight of the manual pump is relatively heavy, and under the action of the weight, the manual pump held on the round surface is easy to slide down, which is easy to hit the feet of the carrier and form a safety hazard. If the manual pump is held horizontally, it is also easy to be blocked by the manual pump when passing through some narrow passages or entering the door.

[0004] Therefore, it is necessary to invent a hydraulic manual pump convenient to carry to solve the above problems. SUMMARY

[0005] The present application aims to provide a hydraulic manual pump convenient to carry to solve the problems in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a hydraulic manual pump convenient to carry, comprising: A manual pump body, a liquid guide pipe is fixedly installed at the left end of the manual pump body, and the liquid guide pipe can be bent to the upper side of the manual pump body; A buckle assembly is provided with two buckles respectively fixed on the outer sides of the two ends of the liquid guide pipe and can be buckled on the outer side of the manual pump body; Two straps are provided, and the two ends of each strap are connected with the two buckle assemblies, respectively. When carrying the manual pump body, the two straps are staggered to wrap the manual pump body on the back of the carrier.

[0007] Optionally, the manual pump body comprises: A pump body; Two placing seats are provided and are fixed on the two ends of the pump body, respectively. The pump body is placed on a workbench, and the two ends of the placing seat are provided with hinge grooves; Four support leg assemblies are provided and are hingedly connected in the hinge grooves, respectively. The support leg assemblies are adapted to adjust the height of the pump body. The hand-holding part is mounted on the outside of the left end placing base and connected with the pump body.

[0008] Optionally, the supporting leg assembly comprises: The supporting plate is hinged inside the hinge groove and rotatable relative to the placing base, and a plurality of left-right through limiting through holes are formed in the supporting plate; The positioning plate is rotatably mounted on the outside of the placing base and inserted into the inside of at least one hinge groove to limit the rotation of the supporting plate; The cushion plate is hinged at the bottom of the supporting plate and in contact with the ground.

[0009] Optionally, the hand-holding part comprises: The hinge frame is fixed on the outside of the left end placing base; The hinge joint is connected on the hinge frame and rotates to drive the pump body in normal use; The hand-holding rod is fixed on the hinge joint and rotates the hinge joint relative to the hinge frame under the force of the user, and the hand-holding rod passes through the two buckle assemblies when being stored; The first notch is provided with two groups and located on the outside of the hand-holding rod corresponding to the buckle assemblies.

[0010] Optionally, the buckle assembly comprises: The fixed sleeve is fixed on the outside of the liquid guide pipe, The buckle block is fixed on the outside of the fixed sleeve and buckled on the outside of the manual pump body under the driving of the fixed sleeve; The clamping piece is provided with two symmetrically arranged clamping pieces, which are rotatably mounted in the inside of the buckle block and clamp the manual pump body; The limiting assembly is provided with two limiting assemblies and rotatably mounted in the inside of the buckle block, and limits the rotation range of the clamping piece in the clamping state.

[0011] Optionally, the buckle block is provided with a first installation space for installing the clamping piece, and both ends of the buckle block are provided with a second installation space for installing the limiting assembly, and the second installation space is in communication with the first installation space.

[0012] Optionally, the clamping piece comprises: The first positioning shaft is fixed in the inside of the first installation space; The clamping arc plate is rotatably mounted on the outside of the first positioning shaft, and the head of the clamping arc plate is provided in an arc shape; The second notch is provided in the inside of the clamping arc plate and interlaced with the first notch.

[0013] Optionally, the clamping member further comprises: A force plate is fixed outside the clamping arc plate and in contact with the inner wall of the first mounting space; A partition plate is fixed on the top of the force plate; A compression spring is fixed on the top of the force plate and extends obliquely upward to be fixedly connected with the inner top wall of the first mounting space, and when the clamping arc plate rotates, it drives the force plate to press the compression spring.

[0014] Optionally, the limiting assembly comprises: A second positioning shaft is fixed inside the second mounting space; A rotating disc is rotatably installed outside the second positioning shaft; An extrusion head is fixed outside the rotating disc and fixedly connected with the back strap, and when the hand pump is carried on the back, the back strap is stressed to drive the rotating disc to rotate, so that the rotating disc drives the extrusion head to rotate above the force plate.

[0015] A coil spring is fixedly connected at both ends with the inner surface of the rotating disc and the outer side of the second positioning shaft.

[0016] Optionally, the extrusion head gradually decreases in diameter from the center to the outside, the head of the extrusion head extends into the first mounting space, and is provided in a circular arc shape.

[0017] The technical effects and advantages of the present application are: 1. The buckle assembly of the present application is buckled outside the main body of the hand pump, fixing the main body of the hand pump and the liquid guide pipe together, and when the back strap is carried on the back, it will first wrap around the outside of the pump body, fixing the hydraulic hand pump as a whole, and then carried on the back of the carrier; When the back strap is carried on the back, it will drive the extrusion head to extrude the force plate, so that the force plate drives the clamping arc plate to increase the clamping force, so that the weight of the main body of the hand pump acts on the clamping force, which can more easily ensure the stability of the main body of the hand pump, and at the same time, the main body of the hand pump is limited by the notch, avoiding the main body of the hand pump from sliding down, improving the safety during carrying.

[0018] 2. The pad is in contact with the ground, so that the pad is placed more stably, and the support height of the main body of the hand pump can also be adjusted according to the different angles of rotation of the support plate. The rotation of the support plate is limited by the cooperation of the positioning plate and the limiting hole, and at the same time, the support plate can be rotated ° to be folded upwards, which will not affect the carrying of the carrier. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a main view of the structure of the present application. Figure 2 It is the support foot assembly structure schematic view of the present application; Figure 3 It is the buckle assembly structure internal schematic view of the present application; Figure 4 It is the compression spring structure schematic view of the present application; Figure 5 It is the second notch structure schematic view of the present application; Figure 6 It is the volute spring structure schematic view of the present application.

[0020] In the figure: 100, manual pump main body;110, pump body;120, placing seat;130, hinged groove;140, support foot assembly;141, support plate;142, limiting through hole;143, positioning plate;144, pad plate;150, hand holding part;151, hinged frame;152, hinged joint;153, hand holding rod;154, first notch;200, liquid guide pipeline;300, buckle assembly;310, buckle block;311, first installation space;312, second installation space;320, fixed sleeve;330, clamping piece;331, first positioning shaft;332, clamping arc plate;333, second notch;334, force bearing plate;335, partition plate;336, compression spring;340, limiting assembly;341, second positioning shaft;342, rotating disc;343, extrusion head;344, volute spring;400, shoulder strap. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] The present application provides a hydraulic manual pump convenient to carry, as shown in Figures 1-6 The hydraulic manual pump convenient to carry comprises: A manual pump main body 100, a liquid guide pipeline 200 is fixedly installed at the left end of the manual pump main body 100, and the liquid guide pipeline 200 can be bent to the upper side of the manual pump main body 100; A buckle assembly 300, the buckle assembly 300 is provided with two buckle blocks respectively fixed at the outer sides of two ends of the liquid guide pipeline 200, and can be buckled on the outer side of the manual pump main body 100; Two shoulder straps 400, and the two ends of the shoulder strap 400 are connected with the two buckle assemblies 300 respectively, and when the manual pump main body 100 is carried, the two shoulder straps 400 are staggered to wrap the manual pump main body 100 on the back of the carrier.

[0023] The buckle assembly 300 is fastened to the outside of the manual pump body 100, fixing the manual pump body 100 and the liquid guide pipe 200 together. When the shoulder strap 400 is carried, it will first wrap around the outside of the pump body 110, and then fix the hydraulic manual pump into a whole when the hydraulic manual pump is carried, and then carry it on the back of the carrier. The outer side of the 400 shoulder strap can be wrapped with a layer of sponge padding to reduce the impact of external forces on the arms.

[0024] In this invention, by Figure 1 and Figure 2 As shown, the manual pump body 100 includes: Pump body 110; Placement seat 120, two placement seats 120 are provided and fixed to both ends of the pump body 110 respectively. The pump body 110 is placed on the worktable. Both ends of the placement seat 120 are provided with hinge grooves 130. The support foot assembly 140 has four parts, each hinged inside the hinge slot 130. The support foot assembly 140 is adapted to adjust the placement height of the pump body 110. The handheld part 150 is installed on the outside of the left end placement seat 120 and connected to the pump body 110. At the same time, when carrying, the handheld part 150 and the pump body 110 can be fixed together by cable ties to prevent the handheld part 150 and the pump body 110 from rotating relative to each other during carrying.

[0025] The placement seat 120 increases the contact area between the pump body 110 and the ground to increase stability. This position also allows the manual pump body 100 to be placed at a lower height. The placement seat 120 can be placed on the ground or a workbench. The hinge groove 130 provides space for the installation of the support foot assembly 140, allowing the support foot assembly 140 to be normally installed and rotated inside the hinge groove 130 via the spindle.

[0026] Among them, by Figure 2 As shown, the support leg assembly 140 includes: The support plate 141 is hinged inside the hinge groove 130 and can rotate 180° relative to the placement seat 120. The support plate 141 has multiple through holes 142 that extend from left to right. When the hydraulic manual pump lifts the person up, the support plate 141 contacts the back of the person carrying the vehicle. At the same time, a layer of sponge pad can be bonded to the bottom of the support plate 141. Positioning plate 143 is rotatably mounted on the outside of placement base 120 and inserted into at least one hinge groove 130 to restrict the rotation of support plate 141. When positioning plate 143 corresponds to limiting through hole 142, the insert on positioning plate 143 is inserted into the limiting through hole 142. During adjustment, the insert can be pulled out from the limiting through hole 142. Pad 144 is hinged to the bottom of support plate 141 and contacts the ground.

[0027] Among them, the support plate 141 cooperates with the hinge groove 130 and drives the pad 144 to rotate and adjust under the action of external force, so that the height of the pad 144 relative to the placement seat 120 is changed and adjusted. At the same time, there is a large friction between the pad 144 and the support plate 141, which can prevent the pad 144 from rotating when the external force it receives reaches a certain level. The positioning plate 143 can correspond to different limiting through holes 142 according to the rotation of the support plate 141 and the positioning plate 143, and be inserted into the inside of the limiting through hole 142 to fix the support plate 141. The tilt height and position of the support plate 141 can be changed according to the insertion into different limiting through holes 142. The pad 144 is positioned in contact with the ground, making it more stable. The support height of the manual pump body 100 can be adjusted according to the rotation angle of the support plate 141. The rotation of the support plate 141 is restricted by the cooperation of the positioning plate 143 and the limiting through hole 142. The support plate 141 can rotate 180° to the top for folding without affecting the user's carrying.

[0028] Among them, by Figure 2 As shown, the handheld portion 150 includes: Hinged bracket 151, which is fixed to the outside of the left end placement seat 120; Hinged joint 152 is connected to hinge frame 151 and rotates to drive pump body 110 to use normally; The hand lever 153 is fixed to the hinge joint 152 and rotates the hinge joint 152 relative to the hinge frame 151 under the force applied by the user. When the hand lever 153 is retracted, it passes through two buckle assemblies 300. The first notch 154 is provided in two sets and is located on the outside of the handle 153, corresponding to the buckle assembly 300.

[0029] The hinge frame 151 is arranged to provide support for the hinge joint 152 and ensure the height of the hinge joint 152, so that the hinge joint 152 can rotate normally; the hand rod 153 is fixed with the hinge joint 152, and under the action of the torque, the external force applied by the user operation is reduced, and the hand rod 153 is driven to normally use the manual pump body 100 under the swing of the hand rod 153.

[0030] As shown in Figures 3-6 The buckle assembly 300 comprises: The fixed sleeve 320 is fixed outside the liquid guide pipe 200, The buckle block 310 is fixed outside the fixed sleeve 320 and buckled outside the manual pump body 100 under the driving of the fixed sleeve 320, and the buckle block 310 can be divided into two parts, and the two parts of the buckle block 310 are fixed by bolts; The clamping piece 330 is provided with two symmetrical clamping pieces 330, which are rotatably installed inside the buckle block 310 and clamp the manual pump body 100; The limiting assembly 340 is provided with two limiting assemblies 340 and is rotatably installed inside the buckle block 310, and the rotating range of the clamping piece 330 in the clamping state is limited.

[0031] The split arrangement of the buckle block 310 can install the clamping piece 330 and the limiting assembly 340 inside by separation, and after the clamping piece 330 and the limiting assembly 340 are installed, the two buckle blocks 310 are buckled together, and then fixed by bolts.

[0032] As shown in Figures 3-4 The buckle block 310 is provided with a first installation space 311 for installing the clamping piece, and the two ends of the buckle block 310 are provided with a second installation space 312 for installing the limiting assembly, and the second installation space 312 is communicated with the first installation space 311.

[0033] The first installation space 311 provides space for the installation and rotation of the clamping piece 330; and the second installation space 312 provides space for the installation and rotation of the limiting assembly 340.

[0034] As shown in Figures 3-5 The clamping piece 330 comprises: The first positioning shaft 331 is fixed inside the first installation space 311; The clamping arc plate 332 is rotatably installed outside the first positioning shaft 331, and the head of the clamping arc plate 332 is arranged in an arc shape. The second notch 333 is arranged inside the clamping arc plate 332 and is staggered with the first notch 154; wherein, the clamping member 330 further comprises: Figures 3-5 , The force bearing plate 334 is fixed on the outside of the clamping arc plate 332 and is in contact with the inner wall of the first mounting space 311; The partition plate 335 is fixed on the top of the force bearing plate 334; The compression spring 336 is fixed on the top of the force bearing plate 334 and extends obliquely upward to be fixedly connected with the inner top wall of the first mounting space 311. When the clamping arc plate 332 rotates, the force bearing plate 334 drives the compression spring 336 to be extruded; Wherein, the two ends of the compression spring 336 can be fixed with a rotating head, which is in contact with the inner top wall of the first mounting space 311 and the top of the force bearing plate 334.

[0035] Wherein, the setting center of the first positioning shaft 331 ensures the normal installation of the clamping arc plate 332, and also serves as the rotation center of the clamping arc plate 332 to ensure the normal rotation of the clamping arc plate 332. The middle part of the hinge of one of the clamping arc plates 332 is left with space, and the hinge of the other clamping arc plate 332 is arranged directly in the middle part and is adapted to the space left in the middle part of the hinge of the previous clamping arc plate 332; Wherein, the clamping arc plate 332 can adjust the opening angle by rotating, clamp the handheld rod 153, and when the buckle assembly 300 is buckled, the handheld rod 153 will extrude the arc head of the clamping arc plate 332, and under the action of the arc surface, the two clamping arc plates 332 will be pushed to rotate and open synchronously to the two sides, and the handheld rod 153 will be clamped into the inside of the two clamping arc plates 332; Wherein, the second notch 333 is arranged in a staggered and overlapping manner with the first notch 154, and the buckle assembly 300 is fixed on the outside of the handheld rod 153, and the handheld rod 153 and the buckle assembly 300 are limited from sliding up and down; Wherein, the force bearing plate 334 limits the rotation range of the clamping arc plate 332, and at the same time, the external force acting on the clamping arc plate 332 is applied to the compression spring 336, so that the compression spring 336 can be normally compressed; an external force is applied to the clamping of the clamping arc plate 332 by the elastic force of the compression spring 336, so as to avoid loosening of the clamping; Wherein, the partition plate 335 blocks the limiting assembly 340, so as to avoid that the clamping arc plate 332 drives the compression spring 336 to approach the limiting assembly 340 during rotation, causing the limiting assembly 340 to extrude the compression spring 336 to bend and damage the stress.

[0036] wherein, Figure 3 , Figure 4, Figure 6 As shown, the limiting component 340 includes: The second positioning shaft 341 is fixed inside the second mounting space 312; Rotary disk 342 is rotatably mounted on the outside of the second positioning shaft 341; The extrusion head 343 is fixed on the outside of the rotating disk 342 and is fixedly connected to the shoulder strap 400. When the manual pump is carried, the shoulder strap 400 is subjected to force to drive the rotating disk 342 to rotate, so that the rotating disk 342 drives the extrusion head 343 to rotate above the support plate 334.

[0037] The coil spring 344 has its two ends fixedly connected to the inner surface of the rotating disk 342 and the outer side of the second positioning shaft 341, respectively.

[0038] The second positioning shaft 341 is configured to serve as a positioning element for the installation of the rotating disk 342, allowing the rotating disk 342 to rotate in a circular shape around the second positioning shaft 341. The coil spring 344 is configured to store force when the shoulder strap 400 pulls the rotating disk 342 to rotate, and to drive the rotating disk 342 to quickly return to its original position after the force exerted by the shoulder strap 400 on the rotating disk 342 disappears. The rotating disk 342 is set separately, which facilitates the installation of the coil spring 344. The extrusion head 343 is rotated when subjected to the tension of the strap 400 and comes into contact with the support plate 334, restricting the rotation of the support plate 334. When the support plate 334 breaks and is misaligned with the extrusion head 343, it will come into contact with the dividing plate 335 under the rotation of the clamping arc plate 332, thus positioning the clamping arc plate 332.

[0039] Among them, by Figure 3 and Figure 4 As shown, the diameter of the extrusion head 343 gradually decreases as it extends outward from the center. The head of the extrusion head 343 extends into the interior of the first mounting space 311 and is set in an arc shape.

[0040] The change in the diameter of the extrusion head 343 can prevent the torque from affecting the fixation of the extrusion head 343 and prevent the extrusion head 343 from breaking when subjected to force.

[0041] The working method of this invention: During placement, the angle of the support plate 141 is adjusted according to the required placement height. The adjustment disconnects the insertion of the positioning plate 143 and the limiting through hole 142. Then, the support plate 141 is rotated as required. When the support plate 141 is rotated to the corresponding angle, the positioning plate 143 is inserted back into the limiting through hole 142 to fix the support plate 141, so that the support plate 141 can properly guarantee the height of the pump body 110. When the back is carried, the buckle assembly 300 is buckled on the outside of the handheld rod 153, and the second notch 333 is corresponded with the first notch 154; When buckled, the handheld rod 153 will extrude the clamping arc plate 332, and under the action of the arc surface, the two clamping arc plates 332 will rotate in the opposite direction with the first positioning shaft 331 as the center, and in the process of rotation, the force plate 334 will extrude the compression spring 336, so that the compression spring 336 is compressed to generate elastic force. When the handheld rod 153 moves between the two clamping arc plates 332, the elastic force of the compression spring 336 will be released, and an external force will be applied to the force plate 334 and the clamping arc plate 332. Since the clamping arc plate 332 has the first positioning shaft 331 as the center, the clamping arc plate 332 will rotate to clamp the handheld rod 153, so that the second notch 333 and the first notch 154 are arranged in a staggered manner. Then the shoulder strap 400 is wound around the outside of the pump body 110 and staggered, and then an external force is applied to the shoulder strap 400, and the shoulder strap 400 is worn on the back of the carrier. The rotating disc 342 and the extrusion head 343 will rotate, and the rotating disc 342 will drive the coil spring 344 to store energy when rotating, and the extrusion head 343 will rotate and contact the force plate 334, so that the extrusion head 343 extrudes the force plate 334 to increase the external force applied to the force plate 334. When the pump body 110 is put down, the coil spring 344 will drive the rotating disc 342 and the extrusion head 343 to quickly reset, and an external force will be applied to the buckle assembly 300. The handheld rod 153 will clamp the clamping arc plate 332, so that the handheld rod 153 can be normally taken out of the buckle assembly 300.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A portable hydraulic hand pump characterized by, The utility model provides a portable hydraulic manual pump, which comprises a manual pump body, a liquid guide pipe fixedly arranged at the left end of the manual pump body, and a buckle assembly fixedly arranged at the outer side of the liquid guide pipe.

2. The portable hydraulic manual pump according to claim 1, wherein the manual pump body comprises a pump body, a placing seat fixedly arranged at the two ends of the pump body, a hinge groove formed at the two ends of the placing seat, a support foot assembly rotatably arranged in the hinge groove, and a hand holding part arranged at the outer side of the left end of the placing seat and connected with the pump body.

3. The portable hydraulic manual pump according to claim 2, wherein the support foot assembly comprises a support plate rotatably arranged in the hinge groove, a plurality of limiting through holes formed in the support plate, a positioning plate rotatably arranged at the outer side of the placing seat and inserted into at least one hinge groove, and a pad plate rotatably arranged at the bottom of the support plate and in contact with the ground.

4. The portable hydraulic manual pump according to claim 2, wherein the hand holding part comprises a hinge frame fixedly arranged at the outer side of the left end of the placing seat, a hinge joint arranged on the hinge frame and used for driving the pump body to work normally, a hand holding rod fixedly arranged on the hinge joint and used for driving the hinge joint to rotate relative to the hinge frame under the force of a user, and a first notch arranged on the outer side of the hand holding rod and corresponding to the buckle assembly.

5. The portable hydraulic manual pump according to claim 1, wherein the buckle assembly comprises a fixed sleeve fixedly arranged at the outer side of the liquid guide pipe, a buckle block fixedly arranged at the outer side of the fixed sleeve and used for buckling the outer side of the manual pump body, a clamping piece arranged at the inner side of the buckle block and used for clamping the manual pump body, and a limiting assembly arranged at the inner side of the buckle block and used for limiting the rotating range of the clamping piece in the clamping state.

6. The portable hydraulic manual pump according to claim 5, wherein the buckle block is provided with a first installation space arranged at the inner side of the clamping piece and a second installation space arranged at the two ends of the buckle block and in communication with the first installation space. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. The portable hydraulic hand pump according to claim 5, characterized in that: the clamping member comprises: a first positioning shaft fixed inside the first mounting space; a clamping arc plate rotatably mounted outside the first positioning shaft, the head of the clamping arc plate being arc-shaped; a second notch arranged inside the clamping arc plate and interlaced with the first notch.

8. The portable hydraulic hand pump according to claim 7, characterized in that: the clamping member further comprises: a bearing plate fixed outside the clamping arc plate and in contact with the inner wall of the first mounting space; a partition plate fixed on the top of the bearing plate; a compression spring fixed on the top of the bearing plate and extending obliquely upward to be fixedly connected with the inner top wall of the first mounting space, the bearing plate being driven to press the compression spring when the clamping arc plate rotates.

9. The portable hydraulic hand pump according to claim 5, characterized in that: the limiting assembly comprises: a second positioning shaft fixed inside the second mounting space; a rotating disc rotatably mounted outside the second positioning shaft; a pressing head fixed outside the rotating disc and fixedly connected with the shoulder strap, the shoulder strap being driven to rotate the rotating disc when the hand pump is carried on the back, so that the rotating disc drives the pressing head to rotate above the bearing plate; a coil spring having two ends fixedly connected with the inner surface of the rotating disc and the outer side of the second positioning shaft, respectively.

10. The portable hydraulic hand pump according to claim 9, characterized in that: the pressing head gradually decreases in diameter from the center to the outside, the head of the pressing head extending into the first mounting space and being arc-shaped.

Images