A manufacturing process for color identification belt of oil cylinder and piston rod of engineering vehicle with 0-position sensor

Abstract

The present invention relates to a manufacturing process of a color recognition belt for an oil cylinder and a piston rod of an engineering vehicle with a 0-position sensor, comprising a cylinder body, a piston rod penetrating the inner cavity of the cylinder body, a cylinder head assembled at the right end of the cylinder body, a piston fixed on the surface of the piston rod and slidingly arranged in the cylinder body, and a mid-position sensor, a support ring is installed between the cylinder body and the piston, and a cylinder seat is welded at one end of the cylinder body away from the cylinder head. The present invention relates to the technical field of oil cylinders for engineering vehicles. The manufacturing process of a color recognition belt for an oil cylinder and a piston rod of an engineering vehicle with a 0-position sensor, when the color recognition belt moves to the position of the sensing end of the mid-position sensor, a signal is sent to the control system to make a corresponding action, the piston and the cylinder body play a guiding and supporting role through the support ring, there is a wire retaining ring a installation groove on the cylinder body, and there is a wire retaining ring b installation groove on the cylinder head for installing the wire retaining ring, and the wire retaining ring can be installed with a circlip pliers during installation, and this structure is simple and convenient to install and disassemble.

Description

Technical Field

[0001] The invention relates to the technical field of engineering vehicle oil cylinders, and in particular to a manufacturing process of an engineering vehicle oil cylinder with a 0-position sensor and a piston rod color identification belt. Background Art

[0002] The oil cylinder is mainly used for steering drive axles of engineering machinery such as wheeled excavators and loaders, and special vehicles. The steering and positioning of the wheels are achieved by extending and retracting the piston rod of the steering oil cylinder. In order to ensure that the wheels of the vehicle are in the middle, a tire centering mechanism is generally provided so that the tire can be detected to return to the middle position during driving. In the prior art, some mechanical structures are used, and the tire centering mechanism is welded and installed on the steering axle. The centering of the wheel is achieved by means of limit and other methods. However, this structure is inconvenient to install, and may cause deformation and damage by welding; some centering structures use electromagnetic sensors for detection. This solution has a complex production process, high manufacturing difficulty, high cost, and weak market competitiveness; and some centering structures use color sensors for detection. This solution has poor stability and low precision. Especially in complex and changeable working environments and hydraulic systems, it is very easy to have quality problems and poor user experience.

[0003] Using electromagnetic sensors, that is, magnetic field sensors made based on the Hall effect, this route requires the use of non-magnetic metal materials for the oil cylinder, and the corresponding piston rod identification groove needs to be inlaid with magnetic rings to generate signals through magnetic field changes. This solution has a complex production process, high manufacturing difficulty, and high cost.

[0004] A color sensor is used to detect color by comparing the color of an object with a previously recorded reference color. When the two colors match within a certain error range, a detection signal is output. The piston rod needs to be a dark-colored identification part. This solution has poor detection stability and low accuracy. Especially in complex and changeable working environments and hydraulic systems, quality problems are very likely to occur, and the user experience is poor. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a process for manufacturing a color identification belt for an engineering vehicle oil cylinder and piston rod with a 0-position sensor, which solves the above-mentioned problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an engineering vehicle oil cylinder with a 0-position sensor, comprising a cylinder body, a piston rod penetrating the inner cavity of the cylinder body, a cylinder head assembled at the right end of the cylinder body, a piston fixed on the surface of the piston rod and slidingly arranged in the cylinder body, and a mid-position sensor, a support ring is installed between the cylinder body and the piston, a cylinder seat is welded on the end of the cylinder body away from the cylinder head, a color identification belt is arranged on the piston rod, and the cylinder body is provided with a mid-position sensor mounting hole for installing the sensor. When the color identification belt moves to the position of the mid-position sensor sensing end, a signal is sent to the control system to make a corresponding action. The piston and the cylinder body play a guiding and supporting role through the support ring, a wire retaining ring a mounting groove is provided on the cylinder body, and a wire retaining ring b mounting groove is provided on the cylinder head for installing the wire retaining ring. During installation, a circlip pliers can be used to install the wire retaining ring. This structure is simple and convenient to install and disassemble.

[0007] As a further solution of the present invention: an O-ring is arranged between the cylinder body and the cylinder cover for sealing, and a wire retaining ring a and a wire retaining ring b are used for fixing.

[0008] As a further solution of the present invention: a dustproof ring is provided between the cylinder cover and the piston rod to prevent dust, and a sealing ring is provided to seal.

[0009] As a further solution of the present invention: a dustproof ring is provided between the cylinder body and the piston rod to prevent dust, and a sealing ring is provided to seal.

[0010] As a further solution of the present invention: the piston and the piston rod are fixed by a steel ball and sealed by an O-ring.

[0011] As a further solution of the present invention: the piston and the cylinder body are sealed by a Gly ring, and supported by a support ring.

[0012] As a further solution of the present invention: the cylinder body is formed by welding a cylinder base to a cylinder barrel. The cylinder base is subjected to a nitrocarburizing treatment before welding to form a high-hardness ε compound layer on its surface, which significantly improves the wear resistance and corrosion resistance of the parts.

[0013] As a further solution of the present invention: the color identification band is formed on the surface of the piston rod by laser coating. The color identification band and the piston rod are integrated, not easy to wear, and have stronger wear resistance, thereby increasing the overall service life of the product. When the steering cylinder is moving, the piston rod reciprocates. When the color identification band on the piston rod moves to the position of the sensing end of the mid-position sensor, the mid-position sensor senses the color identification band on the piston rod and sends a signal to the control system, thereby enabling the control system to detect that the tire is in the center position.

[0014] The present invention also discloses a manufacturing process of a color identification belt of a cylinder piston rod of an engineering vehicle with a 0-position sensor, comprising the following steps:

[0015] Step 1: machining, the workpiece is peeled, tempered, straightened and then machined by processing equipment;

[0016] Step 2: Grinding: The workpiece after machining is subjected to multiple grinding processes on the surface by a centerless grinding device;

[0017] Step 3: Polishing before plating: polish the workpiece after surface grinding through a polishing machine;

[0018] Step 4: hard chrome plating: the polished workpiece is first plated with hard chrome on the surface through a chrome plating device;

[0019] Step 5: Surface coating: Use laser equipment to etch a color identification band on the chrome-plated workpiece.

[0020] As a further solution of the present invention: the chromium plating in step 4 adopts a composite plating process, which is first nickel plating and then hard chromium plating, and the plating thickness is set to 40-55 μm.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, when the color recognition belt moves to the position of the sensing end of the mid-position sensor, a signal is sent to the control system so that the system can take corresponding actions. The piston and the cylinder body play a guiding and supporting role through the supporting ring. There is a wire retaining ring a installation groove on the cylinder body and a wire retaining ring b installation groove on the cylinder cover for installing the wire retaining ring. When installing, the wire retaining ring can be installed with circlip pliers. This structure is simple and convenient to install and disassemble.

[0023] 2. The present invention first chrome-plated the piston rod surface, and then laser coated the workpiece surface with a ribbon, using a more streamlined production process than competing products, achieving the performance, qualified rate and service life of competing products, reducing at least 3-4 processes compared to similar products, simplifying the production process, and making it easier to achieve automated production and assembly BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic cross-sectional view of the steering cylinder with a 0-position sensor according to the present invention.

[0025] In the figure: 1. cylinder body; 2. piston rod; 3. cylinder head; 4. piston; 5. center position sensor; 6. steel ball; 7. support ring; 8. gray ring; 9. color identification belt; 10. dust ring; 11. sealing ring; 12. O-ring a; 13. O-ring b; 14. wire retaining ring a; 15. wire retaining ring b. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0027] See also Figure 1 The present invention provides a technical solution: an engineering vehicle oil cylinder with a 0-position sensor, comprising a cylinder body 1, a piston rod 2 penetrating the inner cavity of the cylinder body 1, a cylinder head 3 assembled at the right end of the cylinder body 1, a piston 4 fixed on the surface of the piston rod 2 and slidingly arranged in the cylinder body 1, and a mid-position sensor 5, a support ring 7 is installed between the cylinder body 1 and the piston 4, a cylinder seat is welded on the end of the cylinder body 1 away from the cylinder head 3, a color identification belt 9 is arranged on the piston rod 2, and the cylinder body 1 is provided with a mid-position sensor installation hole for installing the sensor 5. When the color identification belt 9 moves to the position of the sensing end of the mid-position sensor 5, a signal is sent to the control system to make a corresponding action, the piston 4 and the cylinder body 1 play a guiding and supporting role through the support ring 7, a wire retaining ring a installation groove is provided on the cylinder body 1, and a wire retaining ring b installation groove is provided on the cylinder head 3 for installing the wire retaining ring. When installing, a circlip pliers can be used to install the wire retaining ring. This structure is simple and convenient to install and disassemble.

[0028] An O-ring 13 is provided between the cylinder body 1 and the cylinder head 3 for sealing, and a wire retaining ring a14 and a wire retaining ring b15 are used for fixing.

[0029] A dustproof ring 11 is provided between the cylinder cover 3 and the piston rod 2 to prevent dust, and a sealing ring 11 is provided to seal.

[0030] A dustproof ring 11 is provided between the cylinder body 1 and the piston rod 2 to prevent dust, and a sealing ring 11 is provided to seal.

[0031] The piston 4 and the piston rod 2 are fixed by the steel ball 6 and sealed by the O-ring 12 .

[0032] The piston 4 and the cylinder body 1 are sealed by a Gly ring 8 and supported by a support ring 7 .

[0033] The cylinder body 1 is formed by welding a cylinder base to a cylinder barrel. The cylinder base is subjected to a nitrocarburizing treatment before welding to form a high-hardness ε compound layer on its surface, which significantly improves the wear resistance and corrosion resistance of the parts.

[0034] The color identification band 9 is formed on the surface of the piston rod 2 by laser coating. The color identification band 9 and the piston rod 2 are integrated, not easy to wear, and have stronger wear resistance, thereby increasing the overall service life of the product. When the steering cylinder is moving, the piston rod 2 reciprocates. When the color identification band 9 on the piston rod 2 moves to the position of the sensing end of the mid-position sensor 5, the mid-position sensor 5 senses the color identification band 9 on the piston rod 2 and sends a signal to the control system, thereby enabling the control system to detect that the tire is in the center position.

[0035] The present invention also discloses a manufacturing process of a color identification belt of a cylinder piston rod of an engineering vehicle with a 0-position sensor, comprising the following steps:

[0036] Step 1: machining, the workpiece is peeled, tempered, straightened and then machined by processing equipment;

[0037] Step 2: Grinding: The workpiece after machining is subjected to multiple grinding processes on the surface by a centerless grinding device;

[0038] Step 3: Polishing before plating: polish the workpiece after surface grinding through a polishing machine;

[0039] Step 4: hard chrome plating: the polished workpiece is first plated with hard chrome on the surface through a chrome plating device;

[0040] Step 5: Surface coating: Use laser equipment to etch a color identification band on the chrome-plated workpiece.

[0041] The chrome plating in step 4 adopts a composite plating process, which is first nickel plating and then hard chrome plating, and the plating thickness is set to 40-55 μm.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An engineering vehicle oil cylinder with a zero-position sensor, comprising a cylinder body (1), a piston rod (2) penetrating the inner cavity of the cylinder body (1), a cylinder cover (3) assembled on the right end of the cylinder body (1), a piston (4) fixed on the surface of the piston rod (2) and slidably arranged in the cylinder body (1), and a mid-position sensor (5), characterized in that: A support ring (7) is installed between the cylinder body (1) and the piston (4); a cylinder seat is welded to one end of the cylinder body (1) away from the cylinder head (3); a color identification band (9) is provided on the piston rod (2); a mid-position sensor installation hole for installing a sensor (5) is provided on the cylinder body (1); when the color identification band (9) moves to the position of the sensing end of the mid-position sensor (5), a signal is sent to the control system so that the system takes corresponding action; the piston (4) and the cylinder body (1) play a guiding and supporting role through the support ring (7); a wire retaining ring a installation groove is provided on the cylinder body (1), and a wire retaining ring b installation groove is provided on the cylinder head (3).

2. The oil cylinder of an engineering vehicle with a 0-position sensor according to claim 1, characterized in that: An O-ring (13) is arranged between the cylinder body (1) and the cylinder cover (3) to perform a sealing function, and a wire retaining ring a (14) and a wire retaining ring b (15) are used to perform a fixing function.

3. The oil cylinder of an engineering vehicle with a 0-position sensor according to claim 1, characterized in that: The dustproof ring (11) is provided between the cylinder cover (3) and the piston rod (2) to prevent dust, and the sealing ring (11) is provided to seal.

4. The oil cylinder of an engineering vehicle with a 0-position sensor according to claim 1, characterized in that: The dustproof ring (11) is provided between the cylinder body (1) and the piston rod (2) to prevent dust, and the sealing ring (11) is provided to seal.

5. The oil cylinder of an engineering vehicle with a 0-position sensor according to claim 1, characterized in that: The piston (4) and the piston rod (2) are fixed by a steel ball (6) and sealed by an O-ring (12).

6. The oil cylinder of an engineering vehicle with a 0-position sensor according to claim 1, characterized in that: The piston (4) and the cylinder body (1) are sealed by a Gly ring (8) and supported by a support ring (7).

7. The oil cylinder of an engineering vehicle with a 0-position sensor according to claim 1, characterized in that: The cylinder body (1) is formed by welding a cylinder base to a cylinder barrel. The cylinder base is subjected to a nitrocarburizing treatment before welding to form an ε compound layer on its surface.

8. The oil cylinder of an engineering vehicle with a 0-position sensor according to claim 1, characterized in that: The color identification band (9) is formed on the surface of the piston rod (2) by laser coating. When the steering cylinder is in motion, the piston rod (2) reciprocates. When the color identification band (9) on the piston rod (2) moves to the position of the sensing end of the mid-position sensor (5), the mid-position sensor (5) senses the color identification band (9) on the piston rod (2) and sends a signal to the control system, so that the control system detects that the tire is in the middle position.

9. A manufacturing process for a color identification belt for a cylinder piston rod of an engineering vehicle with a 0-position sensor, characterized in that: The following steps are involved: Step 1: machining, the workpiece is peeled, tempered, straightened and then machined by processing equipment; Step 2: Grinding: The workpiece after machining is subjected to multiple grinding processes on the surface by a centerless grinding device; Step 3: Polishing before plating: polish the workpiece after surface grinding through a polishing machine; Step 4: hard chrome plating: the polished workpiece is first plated with hard chrome on the surface through a chrome plating device; Step 5: Surface coating: Use laser equipment to etch a color identification band on the chrome-plated workpiece.

10. The manufacturing process of a color identification belt for a cylinder piston rod of an engineering vehicle with a 0-position sensor according to claim 9, characterized in that: The chrome plating in step 4 adopts a composite plating process, which is first nickel plating and then hard chrome plating, and the plating thickness is set to 40-55 μm.

Images