CN218226370U

CN218226370U - Ratchet wrench with good mechanical property

Info

Publication number: CN218226370U
Application number: CN202222592213.0U
Authority: CN
Inventors: 孙佳琪; 孙青�
Original assignee: Siping Jiayi Heat Exchange Equipment Co ltd
Current assignee: Siping Jiayi Heat Exchange Equipment Co ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-01-06
Anticipated expiration: 2032-09-29

Abstract

The utility model belongs to the technical field of the hand tool technique and specifically relates to a ratchet spanner that mechanical properties is good. The ratchet wheel connecting device comprises two connecting plates, a handle, ratchet wheel cores and pawls, wherein one end of each connecting plate is provided with a ratchet wheel core hole, the other end of each connecting plate is provided with a connecting part, the connecting parts are fixedly connected with the handle, the ratchet wheel cores are arranged in the ratchet wheel core holes of the two connecting plates and can rotate relative to the connecting plates, the pawls are arranged on the connecting parts of the connecting plates, and the pawls are meshed with the ratchet wheel cores. This application spanner is a novel instrument, and is small, and light in weight more is applicable to large-scale plate heat exchanger field for the hexagon nut of plate heat exchanger locking heat transfer slab screws up or loosens, and makes ratchet core and pawl mesh mutually through the extension spring, thereby makes the ratchet core rotatory or contrary, convenient operation.

Description

Ratchet wrench with good mechanical property

Technical Field

The utility model belongs to the technical field of the hand tool technique and specifically relates to a ratchet spanner that mechanical properties is good.

Background

The wrench is a hardware tool commonly used in modern production activities and has the function of tightening or loosening a nut. In the field of heat exchangers in the market, a straight-handle outer hexagon wrench, a friction wrench and a ratchet wrench are commonly adopted for dismounting the hexagon nut. The handle of the straight-handle external hexagonal wrench is long, large in volume and heavy. The friction wrench depends on the friction force between the shell and the ratchet wheel, but after a period of abrasion, a gap exists between the shell and the ratchet wheel, and the work sensitivity and the stability are poor. The existing ratchet wrench has the defects that the ratchet and the pawl cannot be completely matched due to the triangular or square shape of the ratchet and the pawl head, the contact area is small, the mechanical strength is low and the existing ratchet wrench is unstable.

There is a need for an important lightweight, durable, and mechanically sound ratchet wrench that allows the user to better assist in tightening and loosening bolts or nuts.

Disclosure of Invention

The utility model aims at providing a ratchet spanner that mechanical properties is good, this spanner is small, light in weight, and mechanical properties is good.

The technical scheme of the utility model:

a ratchet wrench with good mechanical performance comprises two connecting plates, a handle, ratchet cores and pawls, wherein one end of each connecting plate is provided with a ratchet core hole, the other end of each connecting plate is a connecting part, the connecting parts are fixedly connected with the handle, the ratchet cores are arranged in the ratchet core holes of the two connecting plates, the ratchet cores and the connecting plates can rotate relatively, the pawls are arranged on the connecting parts of the connecting plates, and the pawls are meshed with the ratchet cores.

The utility model has the advantages that:

1. this application spanner is a novel instrument, and is small, light in weight more is suitable for large-scale plate heat exchanger field for the hexagon nut of plate heat exchanger locking heat transfer slab screws up or loosens, and makes ratchet core and pawl mesh mutually through the extension spring, thereby makes the ratchet core rotatory or contrary, convenient operation.

2. The utility model provides a clearance phase-match between pawl and the ratchet meshing one end and two adjacent ratchets, coincide completely, area of contact is big, and stability is good, prevents the ratchet and reverses. One side edge of each ratchet is perpendicular to a tangent line of the excircle of the ratchet, the pawl is in plane contact with the perpendicular side edge of each ratchet, the included angle between every two adjacent ratchets is 45-85 degrees, the mechanical strength is high, and the large-scale heat exchange plate can be applied to the fields such as large-scale heat exchange plates and the like which need large torque force.

3. The two connecting plates are designed in a split mode, processing is convenient, and cost is low. The utility model provides a ratchet both sides have the circular bead, carry the ratchet with two connecting plates, and the circular bead closely cooperates with the connecting plate, and is spacing to the ratchet, prevents to move.

4. The pawl and the extension spring of this application adopt through-hole and round pin hub connection mode, and processing is simple, and is convenient, solves the tapping problem, and the dismouting is changed more conveniently moreover.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a front view of a ratchet wrench with good mechanical properties according to the present application.

FIG. 2 is a schematic structural view of the ratchet wrench with one connecting plate removed.

FIG. 3 is a side view of the ratchet wrench connecting plate, ratchet core and handle structure of the present application.

FIG. 4 is a front view of the ratchet core of the ratchet wrench of the present application.

FIG. 5 is a top view of the ratchet core of the ratchet wrench of the present application.

FIG. 6 is a schematic view of a pawl structure of the ratchet wrench of the present application.

FIG. 7 is a schematic view of a connection plate of the ratchet wrench of the present application.

FIG. 8 is a schematic view of the handle structure of the ratchet wrench of the present application.

Reference numerals:

1. a connecting plate; 2. a handle; 3. a ratchet wheel core; 4. a pawl; 11. a ratchet core hole; 12. a connecting portion; 13. a card slot; 14. a tension spring; 15. riveting; 16. a pin shaft; 31. a shoulder; 32. a ratchet wheel; 33. a ratchet; 34. a vertical side; 41. and a through hole.

Detailed Description

In order to solve the problems, the ratchet wrench with good mechanical performance is invented, is more suitable for locking and disassembling the hexagon nut for fixing the heat transfer plate in the large-scale plate heat exchanger, can also be suitable for disassembling and assembling nuts in other fields, and solves the problems of large size, heavy weight, easy wear, instability and low mechanical performance of the wrench in the prior art.

The present application is described in detail below with reference to the attached drawing figures:

a ratchet wrench with good mechanical performance comprises two connecting plates 1, a handle 2, a ratchet core 3 and a pawl 4. One end of the connecting plate 1 is provided with a ratchet wheel core hole 11, the other end of the connecting plate is provided with a connecting part 12, and the connecting part 12 is fixedly connected with the handle 2. The ratchet wheel core 3 is arranged in the ratchet wheel core holes 11 of the two connecting plates 1, and the ratchet wheel core 3 and the connecting plates 1 can rotate relatively. The connecting part of the connecting plate 1 is provided with a pawl 4, the pawl is meshed with the ratchet wheel core 3, and the pawl 4 is meshed with the ratchet of the ratchet wheel, so that the ratchet wheel drives the ratchet wheel core to rotate or stop. The ratchet wheel core hole 11 is circular, and the inner ring of the ratchet wheel core 3 is provided with a clamping groove 13 clamped with the periphery of the hexagon nut. The inside shaft hole that is equipped with towards extension spring one side of pawl 4, the round pin axle is fixed in the shaft hole, and extension spring 14 one end is connected the other end with the round pin axle and is fixed in the connecting portion of connecting plate through rivet 15. The pawl 4 is always engaged with a ratchet wheel arranged in the connecting plate, and the ratchet wheel core can rotate towards one direction under the limitation of the direction of the pawl.

Preferably, the ratchet wheel core 3 is composed of shoulders 31 at two sides and a ratchet wheel 32 in the middle, the ratchet wheel 32 is arranged between the two connecting plates 1, and the shoulders 31 are tightly matched with the connecting plates 1. Two side shoulders 31 pass through the two webs to form projections.

Preferably, one side edge (i.e. the vertical side edge 34) of the ratchet teeth of the ratchet wheel 32 is perpendicular to the tangent of the outer circle of the ratchet wheel 32, and the shape of the end of the pawl 4 engaged with the ratchet teeth 33 is matched with the shape of the gap between two adjacent ratchet teeth. The ratchet teeth can be in a right-angle trapezoidal structure.

Preferably, the included angle between two adjacent ratchets 33 is 45-85 deg. Preferably, the included angle between two adjacent ratchets is 65 degrees. The pawl and the ratchet are meshed with each other, the contact area is large, and the non-return performance is good.

Preferably, the connecting part 12 of the connecting plate 1 is connected with one end of a pawl 4 through a pin 16, the other end of the pawl 4 is meshed with the ratchet of the ratchet wheel, the side surface of the pawl is connected with a tension spring, and the other end of the tension spring is fixedly connected with the connecting part of the connecting plate.

Preferably, an inclined through hole 41 is formed in the pawl 4, a pin shaft is fixed in the through hole, a through hole is formed in the end portion, facing one side of the tension spring, of the pin shaft, and one end of the tension spring is hung in the through hole of the pin shaft.

The plate heat exchanger is formed by superposing a plurality of plates together and is locked and fixed by a hexagon nut, and is commonly used for heat supply of power plants and iron and steel enterprises. The wrench in the prior art is heavy, easy to damage, not durable and poor in mechanical property. The wrench has the advantages of small size, light weight, durability, long service life, large torsion, high stability and good mechanical property.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and not for limiting the same. Although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The utility model provides a ratchet spanner that mechanical properties is good which characterized in that: comprises two connecting plates, a handle, a ratchet wheel core and a pawl,

one end of the connecting plate is provided with a ratchet wheel core hole, the other end is a connecting part which is fixedly connected with the handle,

the ratchet wheel core is arranged in the ratchet wheel core holes of the two connecting plates, the ratchet wheel core and the connecting plates can rotate relatively,

and a connecting part of the connecting plate is provided with a pawl which is meshed with the ratchet wheel core.

2. The mechanical ratchet wrench of claim 1, wherein: the ratchet wheel core consists of shoulders on two sides and a ratchet wheel in the middle, the ratchet wheel is arranged between the two connecting plates, and the shoulders are tightly matched with the connecting plates.

3. The mechanical ratchet wrench of claim 2, further comprising: one side edge of each ratchet of the ratchet wheel is perpendicular to the tangent of the excircle of the ratchet wheel, and the shape of the meshed end of the pawl and the ratchet is matched with the shape of a gap between every two adjacent ratchets.

4. The mechanical ratchet wrench of claim 3, wherein: the ratchet is of a right-angled trapezoid structure.

5. The mechanical ratchet wrench of claim 3, wherein: the included angle between two adjacent ratchets is 45-85 degrees.

6. The mechanical ratchet wrench of claim 5, further comprising: the included angle between two adjacent ratchets is 65 degrees.

7. The mechanical ratchet wrench of claim 1, wherein: the connecting portion of the connecting plate is connected with one end of the pawl through a pin shaft, the other end of the pawl is meshed with the ratchet of the ratchet wheel, the side face of the pawl is connected with the tension spring, and the other end of the tension spring is fixedly connected with the connecting portion of the connecting plate.

8. The mechanical ratchet wrench of claim 7, further comprising: the pawl is provided with an oblique through hole, a pin shaft is fixed in the through hole, a through hole is formed in the end portion, facing one side of the tension spring, of the pin shaft, and one end of the tension spring is hung in the through hole of the pin shaft.

9. The mechanical ratchet wrench of claim 1, wherein: the lower end of the connecting part of the connecting plate is connected with the handle in a welding mode and is riveted through a rivet.