Counting hydraulic wrench

Abstract

The present application provides a kind of counting type hydraulic wrench, the shell top of the present application is provided with counter, counter and magnet are correspondingly arranged each other.Piston rod advances once, magnet drives counter once, counter increases counting function, piston rod reciprocates like this, counter increases counting accordingly, thereby records the use frequency of hydraulic wrench.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic wrench technology, specifically relating to a counting type hydraulic wrench. Background Technology

[0002] A hydraulic wrench is a bolt tightening tool that can output and set torque. It belongs to high-pressure hydraulic tools and is widely used in equipment maintenance and installation in many heavy chemical industries. Summary of the Invention

[0003] Existing hydraulic wrenches lack a counting function and cannot record the number of times they have been used. The purpose of this invention is to provide a counting hydraulic wrench to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a counting hydraulic wrench, comprising a housing, a reaction arm, and the housing being connected to the reaction arm. A rotary joint is provided on the top of the housing, and the rotary joint has two oil inlets. An oil pressure chamber is provided inside the housing, and a rear cover is provided on the right side of the oil pressure chamber. The rear cover is fixedly connected to the housing. A piston is provided inside the oil pressure chamber, and the piston includes a piston rod. A drive plate is provided on the left side of the piston rod, and a pin is provided above the drive plate. A drive shaft is provided below the drive plate. A pawl and a ratchet are provided on the left side of the housing, and the pawl and ratchet are arranged correspondingly to each other. The piston rod is rotatably connected to the pawl through the pin, and the ratchet is fixedly connected to the drive shaft. Power is provided by a hydraulic pump, and the hydraulic oil pressure pushes the piston forward, while the piston rod moves forward simultaneously. The piston rod and pawl are connected by a pin, so that the pawl meshes with the ratchet teeth, driving the ratchet to rotate. The ratchet and drive shaft are connected by splines, so that the drive shaft also rotates simultaneously with the ratchet. When the piston moves to its limit position, the hydraulic pump reverses, driving the piston to retract, and causing the piston rod and pawl to retract, reciprocating in a reciprocating motion to pre-tighten the bolts. A magnet is fixedly installed on the piston rod, and a counter is installed on the top of the housing, with the counter and magnet arranged correspondingly to each other.

[0005] As a preferred embodiment of the present invention, a stop pawl is provided on the housing, and the stop pawl is correspondingly provided with the ratchet.

[0006] As a preferred embodiment of the present invention, the housing and the reaction arm are fixed by a claw hook.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: A counter is provided on the upper part of the housing of the present invention, and the counter and the magnet are arranged correspondingly to each other. When the piston rod advances once, the magnet drives the counter once, and the counter increases its count. The piston rod moves back and forth in this way, and the counter increases its count accordingly, thereby recording the number of times the hydraulic wrench has been used. Attached Figure Description

[0008] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a cross-sectional view of the structure of the present invention; Figure 2 This is a schematic diagram of the hydraulic oil flow direction according to the present invention; Figure 3 This is a side sectional view of the present invention; Figure 4 Top view of the present invention Figure 5 This is a schematic diagram of the internal structure of the present invention after the hidden housing is installed.

[0009] In the diagram: 1. Housing; 2. Reaction arm; 3. Claw hook; 4. Rotary joint; 5. Oil inlet; 6. Rear cover; 7. Hydraulic chamber; 8. Piston; 9. Piston rod; 10. Magnet; 11. Drive plate; 12. Pin; 13. Drive shaft; 14. Pawl; 15. Ratchet; 16. Stop pawl; 17. Counter. Detailed Implementation

[0010] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0011] Please see Figure 1-5 The present invention provides the following technical solution: a counting hydraulic wrench, comprising a housing 1, a reaction arm 2, the housing 1 and the reaction arm 2 being connected, the reaction arm 2 being rotatable and then fixed to a rear cover 6 by a claw hook 3. A rotary joint 4 is provided on the top of the housing 1, and two oil inlets 5 are provided on the rotary joint 4. A hydraulic chamber 7 is provided inside the housing 1, and a rear cover 6 is provided on the right side of the hydraulic chamber 7. The rear cover 6 is fixedly connected to the housing 1 by bolts. A piston 8 is provided inside the hydraulic chamber 7, and the piston 8 includes a piston rod 9 and a magnet 10 fixed on the piston rod 9. A drive plate 11 is provided on the left side of the piston rod 9, a pin 12 is provided above the drive plate 11, and a drive shaft 13 is provided below the drive plate 11. A pawl 14 and a ratchet 15 are provided on the left side of the housing 1, and the pawl 14 and ratchet 15 are arranged correspondingly to each other. The piston rod 9 is rotatably connected to the pawl 14 by the pin 12. The ratchet 15 is fixedly welded to the drive shaft 13 or integrally formed, and the ratchet 15 drives the drive shaft 13 to rotate.

[0012] The housing 1 is provided with a stop pawl 16, which is correspondingly provided with the ratchet 15. The stop pawl 16 prevents the ratchet 15 from rotating.

[0013] A counter 17 is installed on the top of the housing 1, and the counter 17 is arranged correspondingly to the magnet 10. When the piston rod 9 moves forward once, the magnet 10 drives the counter 17 once, and the counter 17 increments its count. The piston rod 9 moves back and forth in this way, and the counter 17 increments its count accordingly, thus recording the number of times the hydraulic wrench has been used.

[0014] The rotary joint 4 is divided into port A and port B, both of which are connected to the hydraulic pump. For example... Figure 2 As shown, oil enters through port A, and the hydraulic oil flows in the direction indicated by arrow a. Oil exits through port B, and the hydraulic oil flows in the direction indicated by arrow b. At this time, piston rod 9 moves forward. Conversely, the hydraulic pump reverses the direction through the solenoid valve, and piston rod 9 retracts.

[0015] In operation: Power is provided by a hydraulic pump, and the hydraulic oil pressure pushes the piston 8 forward, while the piston rod 9 moves forward at the same time; the piston rod 9 is connected to the pawl 14 through the pin 12, so that the pawl 14 meshes with the ratchet 15, driving the ratchet 15 to rotate; the ratchet 15 is connected to the drive shaft 13 through spline gears, so that the drive shaft 13 also rotates at the same time as the ratchet 15; when the piston 8 moves to the limit position, the hydraulic pump reverses, driving the piston 8 to move backward, and driving the piston rod 9 and the pawl 14 to retract, reciprocating motion, and the drive shaft 13 pre-tightens the bolts.

[0016] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A counting hydraulic wrench, comprising a housing (1), a reaction arm (2), wherein the housing (1) is connected to the reaction arm (2), a rotary joint (4) is provided on the top of the housing (1), the rotary joint (4) is provided with two oil inlets (5), a hydraulic chamber (7) is provided inside the housing (1), a rear cover (6) is provided on the right side of the hydraulic chamber (7), the rear cover (6) is fixedly connected to the housing (1), and a piston (8) is provided inside the hydraulic chamber (7), the piston (8) comprising a piston The piston rod (9) has a drive plate (11) on its left side, a pin (12) on top of the drive plate (11), and a drive shaft (13) below the drive plate (11). A pawl (14) and a ratchet (15) are provided on the left side of the housing (1). The pawl (14) and ratchet (15) are arranged correspondingly to each other. The piston rod (9) is rotatably connected to the pawl (14) via the pin (12), and the ratchet (15) is fixedly connected to the drive shaft (13). The characteristic feature is that... A magnet (10) is fixedly installed on the piston rod (9), and a counter (17) is installed above the housing (1). The counter (17) and the magnet (10) are arranged correspondingly to each other.

2. A counting hydraulic wrench according to claim 1, characterized in that, The housing (1) is provided with a stop pawl (16), which is correspondingly provided with a ratchet (15).

3. A counting hydraulic wrench according to claim 1, characterized in that, The housing (1) and the reaction arm (2) are fixed by a claw hook (3).

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