Tooling structure to ensure the verticality of the rod head assembly and sleeve in the assembly of hydraulic cylinders

Abstract

The tooling structure ensures the verticality of the rod head assembly and the sleeve during the assembly of the hydraulic cylinder. The rod head assembly includes a rod head, an oil pipe assembly and a rod bottom that are connected and matched with each other. The sleeve is sleeved on the outside of the rod head assembly from the bottom end of the rod, and the retaining ring is inserted between the sleeve and the rod bottom from the bottom end of the rod, and the inner and outer walls of the retaining ring are respectively close to the sleeve and the rod bottom; the tooling top cylinder is a cylinder, and its inner cavity wall is tightly matched with the outer wall surface of the rod bottom. The inner end of the cylinder forms a stepped structure, and the length of its front section is adapted to the distance of the retaining ring inserted into the sleeve, and the outer edge diameter is consistent with the inner diameter of the sleeve. The tooling top cylinder is inserted from the bottom end of the rod, and the retaining ring is inserted into a fixed position in the sleeve to ensure that the rod bottom position and the sleeve are tightly matched, so as to correct the rod head assembly so that the rod head assembly and the sleeve remain in a vertical state.

Description

Technical field:

[0001] The utility model belongs to the technical field of hydraulic oil cylinders and relates to a tooling structure for ensuring the verticality of a rod head component and a sleeve in the assembly of a hydraulic oil cylinder. Background technology:

[0002] With the development of diversified applications of work machinery, the structure of work machinery tends to be refined, humanized, and convenient for operation and maintenance. For example, taking aerial work machinery as an example, the aerial work platform needs to use a long-stroke hydraulic cylinder to drive the extension and retraction of the boom. The long-stroke telescopic cylinder is arranged in the boom, and the assembly space is relatively compact. In order to ensure that the telescopic cylinder can drive the boom to extend and retract smoothly, it is required to achieve a high processing and assembly accuracy during the cylinder production process to ensure the verticality of the rod head assembly and sleeve.

[0003] However, at present, the telescopic cylinders of aerial work platforms are assembled and processed by simple marking, which makes it difficult to ensure the verticality requirements of the cylinder ear shaft and the cylinder bottom, and easily leads to errors and interferences when the cylinder is assembled on the main machine, thereby affecting the stability of the aerial work platform operation. Utility model content:

[0004] In view of the above problems in the prior art, the utility model provides a hydraulic cylinder with a displacement sensor fixed on a piston rod, which is suitable for a hydraulic cylinder structure with a compact structure and in which the displacement sensor signal needs to be led out from the piston rod.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The tooling structure for ensuring the verticality of the rod head assembly and the sleeve in the assembly of the hydraulic cylinder includes a rod head assembly, a sleeve, a retaining ring and a tooling top cylinder that cooperate with each other; wherein the rod head assembly includes a rod head, an oil pipe assembly and a rod bottom that are connected and cooperate with each other, the sleeve is sleeved on the outside of the rod head assembly from the bottom end of the rod, the retaining ring is sleeved between the sleeve and the rod bottom from the bottom end of the rod, and the inner and outer walls of the retaining ring are respectively close to the sleeve and the rod bottom; the tooling top cylinder is a cylinder, and its inner cavity wall is tightly matched with the outer wall surface of the rod bottom, and the inner end of the cylinder is A stepped structure is formed, the length of its front section is adapted to the distance of the retaining ring inserted into the sleeve, the outer edge diameter is consistent with the inner diameter of the sleeve, and the tooling top tube is inserted from the bottom end of the rod to ensure that the end face of the front section of the stepped structure is against the outside of the retaining ring, and the outer end of the tooling top tube is knocked until the step surface of the stepped structure is against the outer end face of the sleeve, and the retaining ring is inserted into a fixed position in the sleeve to ensure that the bottom position of the rod and the sleeve are closely matched, so as to calibrate the rod head assembly so that the rod head assembly and the sleeve remain in a vertical state.

[0007] Further, a group of slots are spaced apart at the end of the cylinder.

[0008] Furthermore, the inner cavity of the cylinder forms a stepped surface which is adapted to the stepped structure of the rod bottom to ensure a tight fit between the inner wall of the cylinder and the outer edge surface of the rod bottom.

[0009] Furthermore, there are four notches, and the bottom end surfaces thereof are semicircular structures.

[0010] Furthermore, the outer diameter of the cylinder is consistent with the outer diameter of the sleeve.

[0011] By adopting the above technical solution, the utility model provides a tooling structure for ensuring the verticality of the rod head assembly and the sleeve in the assembly of the hydraulic cylinder, which is used to solve the problem of rod head assembly correction when the length is long. This tooling can realize rapid product correction, the correction process is simple to operate, and the quality after correction is stable; the tooling itself has strong rigidity, and through the close cooperation between the tooling and the rod head, the deformation of the rod head assembly is corrected and spot welded firmly, replacing other correction methods, improving the correction efficiency and quality. The new tooling has the characteristics of simple operation, stable quality and high efficiency, and meets the design requirements of product verticality. Description of the drawings:

[0012] The following is a detailed description of the utility model with accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the assembly of the utility model;

[0014] Figure 2 This is a schematic diagram of the piston rod assembly of the utility model;

[0015] Figure 3 This is a three-dimensional schematic diagram of the top cylinder of the tooling of the utility model;

[0016] Figure 4 This is a schematic plan view of the top tube of the tooling of the utility model;

[0017] Figure 5 It is a side view schematic diagram of the top tube of the tooling of the utility model. Specific implementation method:

[0018] The utility model is described in detail below with reference to the accompanying drawings and embodiments:

[0019] Figure 1-5 Shown is an embodiment of the utility model.

[0020] The tooling structure for ensuring the verticality of the rod head assembly and the sleeve in the assembly of the hydraulic cylinder includes a rod head assembly 1, a sleeve 2, a retaining ring 3 and a tooling top cylinder 4 that cooperate with each other; wherein the rod head assembly 1 includes a rod head 11, an oil pipe assembly 12 and a rod bottom 13 that are connected and cooperate with each other, the sleeve 2 is sleeved on the outside of the rod head assembly from the rod bottom end, the retaining ring 3 is sleeved between the sleeve 2 and the rod bottom 11 from the rod bottom 11 end, and the inner and outer walls of the retaining ring 3 are respectively close to the sleeve 2 and the rod bottom 13; the tooling top cylinder 4 is a cylinder, and its inner cavity wall 41 is tightly matched with the outer wall surface of the rod bottom 13, and the cylinder The inner end forms a stepped structure, and its front section length 42 is adapted to the distance of the retaining ring 3 inserted into the inside of the sleeve 2. The outer edge diameter 43 is consistent with the inner diameter of the sleeve 2. The tooling top tube 4 is inserted from the end of the rod bottom 13 to ensure that the end face 44 of the front section of the stepped structure is against the outside of the retaining ring 3. The outer end of the tooling top tube 4 is knocked until the step surface 45 of the stepped structure is against the outer end face of the sleeve 13. The retaining ring 3 is inserted into a fixed position in the sleeve 2 to ensure that the rod bottom position and the sleeve are closely matched, so as to calibrate the rod head assembly so that the rod head assembly and the sleeve remain in a vertical state.

[0021] In a specific embodiment, a group of notches 46 are spaced apart at the end of the cylinder to ensure the position of the welding point. The inner cavity of the cylinder forms a stepped surface 47 which is adapted to the stepped structure of the rod bottom to ensure that the inner wall of the cylinder and the outer edge of the rod bottom are tightly matched.

[0022] Furthermore, there are four notches 46, and the bottom end surface thereof is a semicircular structure. The outer diameter of the cylinder is consistent with the outer diameter of the sleeve.

[0023] The utility model provides a tooling structure for ensuring the verticality of the rod head assembly and the sleeve in the assembly of the hydraulic cylinder, which is used to solve the problem of rod head assembly correction when the length is long. This tooling can realize rapid product correction, the correction process is simple to operate, and the quality after correction is stable; the tooling itself has strong rigidity, and through the close cooperation between the tooling and the rod head, the deformation of the rod head assembly is corrected and spot welded firmly, replacing other correction methods, improving the correction efficiency and quality. The new tooling has the characteristics of simple operation, stable quality and high efficiency, and meets the design requirements of product verticality.

[0024] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A tooling structure for ensuring the verticality of the rod head assembly and the sleeve during the assembly of the hydraulic cylinder, characterized by: It comprises a rod head assembly, a sleeve, a retaining ring and a tooling top cylinder which cooperate with each other; wherein the rod head assembly comprises a rod head, an oil pipe assembly and a rod bottom which are connected and cooperate with each other, the sleeve is sleeved on the outside of the rod head assembly from the bottom end of the rod, the retaining ring is sleeved between the sleeve and the rod bottom from the bottom end of the rod, and the inner and outer walls of the retaining ring are respectively close to the sleeve and the rod bottom; the tooling top cylinder is a cylinder, the inner cavity wall of which is tightly matched with the outer wall surface of the rod bottom, the inner end of the cylinder forms a stepped structure, the length of its front section is adapted to the distance of the retaining ring inserted into the sleeve, the outer edge diameter is consistent with the inner diameter of the sleeve, the tooling top cylinder is sleeved from the bottom end of the rod, ensuring that the end face of the front section of the stepped structure is against the outside of the retaining ring, the outer end of the tooling top cylinder is knocked until the stepped surface of the stepped structure is against the outer end face of the sleeve, the retaining ring is inserted into a fixed position in the sleeve to ensure that the rod bottom position and the sleeve are tightly matched, so as to calibrate the rod head assembly so that the rod head assembly and the sleeve remain in a vertical state.

2. The tooling structure for ensuring the verticality of the rod head assembly and the sleeve in the assembly of the hydraulic cylinder according to claim 1, characterized in that: The ends of the barrel are spaced apart with a set of notches.

3. The tooling structure for ensuring the verticality of the rod head assembly and the sleeve in the assembly of the hydraulic cylinder according to claim 1 or 2, characterized in that: The inner cavity of the cylinder forms a stepped surface which is adapted to the stepped structure of the rod bottom to ensure that the inner wall of the cylinder and the outer edge surface of the rod bottom are tightly matched.

4. The tooling structure for ensuring the verticality of the rod head assembly and the sleeve in the assembly of the hydraulic cylinder according to claim 2, characterized in that: There are four notches, and the bottom end surface thereof is a semicircular structure.

5. The tooling structure for ensuring the verticality of the rod head assembly and the sleeve in the assembly of the hydraulic cylinder according to claim 4, characterized in that: The outer diameter of the cylinder is consistent with the outer diameter of the sleeve.

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