Tool table for rear wheel mandrel press-fitting bolt

Abstract

A tool table for press fitting of bolts on a rear wheel mandrel comprises a tool table body, a press fitting bolt hole structure is formed in the upper surface of the tool table body and comprises at least four press fitting bolt holes which correspond to the positions of the bolts on the rear wheel mandrel respectively, a cavity structure is arranged at the bottom of the tool table body, and the lower surface of the tool table body is provided with a cavity. The press-fitting bolt hole structure is communicated with the top of the cavity structure, a detection switch mounting hole structure and a safe falling hole structure are arranged on the side portion of the tool table body in a surrounding mode, and the detection switch mounting hole structure is arranged on the upper side of the safe falling hole structure and is communicated with the safe falling hole structure in a smooth transition mode. The aperture of the safety falling hole structure is larger than that of the detection switch mounting hole structure, and the detection switch mounting hole structure and the safety falling hole structure are both communicated with the side face of the cavity structure. The device is simple in structure, can improve the success rate of bolt press-fitting of the rear wheel mandrel part, controls the press-fitting failure cost, and is convenient to overhaul and replace detection equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of workpiece press-fitting tools, and in particular relates to a tooling platform for press-fitting bolts on a rear wheel spindle. Background Art

[0002] The automobile rear wheel spindle assembly consists of four bolts pressed onto the rear wheel spindle part. The four bolts are pressed onto the rear wheel spindle part using a hydraulic press, which has the following defects: 1. The employee fails to step on the hydraulic starting device or the pedal stroke is insufficient, resulting in the bolts not being pressed into place; 2. The equipment has no sensor control and can only rely on visual inspection to prevent errors, resulting in a high frequency of product press-fit failures. The main problems are concentrated on missing bolts and inadequate bolt press-fitting, resulting in a high risk of unqualified products flowing out.

[0003] In the prior art, the patent document with the announcement number CN108827619A discloses a bolt detection device for a bolt press machine, including a bolt feed channel and a thread detection mechanism and a defective bolt removal mechanism arranged on the bolt feed channel; the bolt feed channel includes a material cavity that only accommodates a single bolt rod and edge guards located on both sides of the material cavity, and the bolt heads hang on the edge guards when the bolts pass through the material cavity in a row. The above scheme can inspect and automatically remove defective bolts, thereby reducing the defective rate of the bolt press machine; however, it does not solve the problem of effective monitoring during the process of press-fitting screws, so as to improve the success rate of press-fitting bolts on the rear wheel spindle parts and control the cost of press-fitting failures. Generally, it is conceivable to add an induction detection device to the tooling table to detect the process of press-fitting bolts to improve the success rate, but if the induction detection device is set arbitrarily, if a press-fitting error occurs, resulting in a deflection of the bolt press-fitting, the bolt will damage the induction detection device, causing the detection system to fail, and even causing safety problems; and the induction detection device is generally an electronic device that needs to be repaired and replaced for a long time, and the general tooling table is not convenient for repair and replacement. Utility Model Content

[0004] 1. Technical Problems Solved

[0005] In view of the deficiencies in the prior art, the utility model provides a tooling table for press-fitting bolts of a rear wheel spindle, which has a simple structure, can improve the success rate of press-fitting bolts of a rear wheel spindle part, control the cost of press-fitting failures, and is convenient for inspecting and replacing detection equipment.

[0006] 2. Specific technical solutions

[0007] A tooling table for press-fitting bolts on a rear wheel spindle, comprising a tooling table body, a press-fitting bolt hole structure is provided on the upper surface of the tooling table body, the press-fitting bolt hole structure comprises at least four press-fitting bolt holes, respectively corresponding to the positions of the bolts on the rear wheel spindle, a cavity structure is provided at the bottom of the tooling table body, the press-fitting bolt hole structure is connected with the top of the cavity structure, a detection switch mounting hole structure and a safety drop-off hole structure are provided around the side of the tooling table body, the detection switch mounting hole structure is provided on the upper side of the safety drop-off hole structure and is smoothly connected, and the aperture of the safety drop-off hole structure is larger than that of the detection switch mounting hole structure, the detection switch mounting hole structure and the safety drop-off hole structure are both connected with the side of the cavity structure, and the center line of the detection switch mounting hole structure is vertically aligned with the center line of the press-fitting bolt hole structure.

[0008] Preferably, the press-fit bolt hole structure consists of four press-fit bolt holes, four detection switch mounting hole structures and four safety drop-off hole structures are arranged around the side of the workbench body, detection switches are installed in the four detection switch mounting hole structures, and all detection switches are connected in series.

[0009] Preferably, the detection switch is a normally open flat head proximity switch.

[0010] Preferably, the detection switch has an outer shell, and threaded structures are provided at both ends of the outer shell. Nut structures are sleeved on the threaded structures, and the two nut structures are clamped and fixed on the side of the workbench body and the side of the cavity structure respectively.

[0011] Preferably, the upper side of the cavity structure is an arc-shaped or arched structure.

[0012] Preferably, the upper surface of the tooling table body has a boss structure, the press-fit bolt hole structure is opened on the boss structure, and screw mounting holes are evenly opened on the upper surface of the tooling table body. The screw mounting holes are arranged around the outer side of the boss structure, and a screw structure is installed in the screw mounting holes.

[0013] The beneficial effects of the utility model are as follows: a detection switch mounting hole structure and a safety drop-off hole structure are provided as an anisotropic hole structure in which two holes are connected as one, and the detection switch mounting hole structure is used to install the detection switch. When the bolt on the rear wheel spindle is pressed and deflected or over-positioned, the bolt will be tilted on the detection switch close to or in contact with it, and the detection switch will be forced to fall off from the detection switch mounting hole structure and fall into the safety drop-off hole structure, so as to avoid the detection switch being crushed and causing a detection system failure, and even causing safety problems, and control and reduce the cost of press-fit failure; and a cavity structure is provided at the bottom of the workbench body, which provides the detection switch with sufficient sensing space and facilitates the later maintenance of the detection switch, i.e., inspection and replacement; four normally open flat head proximity switches are connected in series, corresponding to the sensing positions of 4 bolts, and when the bolts are pressed and in place, the four flat head proximity switches are closed and the sensing signals are output; on the contrary, when the bolts are not pressed and in place, the press machine cannot operate normally without the sensing signal, which means that the press-fitting is abnormal and the abnormal press-fitting products need to be detected to achieve error prevention and improve the success rate of the press-fitting bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model after the rear wheel spindle parts are placed.

[0015] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0016] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the utility model after the rear wheel spindle parts are placed.

[0017] In the figure: the workbench body 1; the press-fit bolt hole structure 2; the cavity structure 3; the detection switch installation hole structure 4; the safety drop-off hole structure 5; the detection switch 6; the boss structure 11; the screw installation hole 12; and the screw structure 13. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "surface", "edge", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example:

[0022] like Figure 1 , Figure 2 and Figure 3 As shown: a tooling table for press-fitting bolts on a rear wheel spindle, comprising a tooling table body 1, a press-fitting bolt hole structure 2 is provided on the upper surface of the tooling table body 1, the press-fitting bolt hole structure 2 is composed of four press-fitting bolt holes, which respectively correspond to the positions of four bolts on the rear wheel spindle, and there may be more press-fitting bolt holes, the number of which corresponds to the number of bolts on the rear wheel spindle, a cavity structure 3 is provided at the bottom of the tooling table body 1, the press-fitting bolt hole structure 2 is connected to the top of the cavity structure 3, the upper side of the cavity structure 3 is an arc or arch structure, the arch structure can withstand greater pressure, and is an ordinary cylindrical cavity with an arc chamfer at the top, which can also withstand greater pressure.

[0023] Four detection switch mounting hole structures 4 and four safety drop-off hole structures 5 are arranged around the side of the workbench body 1. The number of the detection switch mounting hole structures 4 and the four safety drop-off hole structures 5 is the same as the number of the press-fit bolt holes. Detection switches 6 are installed in the four detection switch mounting hole structures 4. All detection switches 6 are connected in series. The detection switch 6 is a normally open flat-head proximity switch, and may also be other normally open induction switches or contact switches. However, the normally open flat-head proximity switch has more accurate detection and lower cost.

[0024] The above-mentioned detection switch mounting hole structure 4 is arranged on the upper side of the safety drop-off hole structure 5 and is connected with a smooth transition, that is, the detection switch mounting hole structure 4 and the safety drop-off hole structure 5 are two holes connected as one anisotropic hole structure, and the hole diameter of the safety drop-off hole structure 5 is larger than the detection switch mounting hole structure 4, the detection switch mounting hole structure 4 and the safety drop-off hole structure 5 are both connected to the side of the cavity structure 3, and the center line of the detection switch mounting hole structure 4 is vertically aligned with the center line of the press-fit bolt hole structure 2, that is, the detection switch 6 will be aligned with the rear wheel spindle bolt inserted and dropped from the press-fit bolt hole structure 2. When the bolt press-fitting on the rear wheel spindle is skewed or over-positioned, the bolt will be pressed on the detection switch 6 that is close to or in contact with it, and the detection switch 6 will fall off from the detection switch mounting hole structure 4 and fall into the safety drop-off hole structure 5 when subjected to force, thereby avoiding the detection switch 6 from being crushed to cause a detection system failure, or even leading to safety problems.

[0025] The above-mentioned detection switch 6 has an outer shell, and threaded structures are provided at both ends of the outer shell. A nut structure is sleeved on the threaded structure. The two nut structures are clamped and fixed on the side of the workbench body 1 and the side of the cavity structure 3 respectively, so that the detection switch 6 can fall off in the safety fall-off hole structure 5 downward after being pressed. The cavity structure 3 at the bottom of the workbench body 1 provides the detection switch 6 with sufficient sensing space and facilitates the later maintenance of the detection switch 6.

[0026] A boss structure 11 is provided on the upper surface of the workbench body 1, and a press-fitting bolt hole structure 2 is provided on the boss structure 11. The press-fitting products of the workbench are left and right workpieces, and the left and right workpieces share a common workbench in mirror symmetry. Screw mounting holes 12 are also evenly provided on the upper surface of the workbench body 1. All screw mounting holes 12 are symmetrically arranged to prevent left and right errors. The screw mounting holes 12 are arranged around the outer side of the boss structure 11, and a screw structure 13 is installed in the screw mounting hole 12 for installing and fixing the entire workbench body 1. The boss structure 11 prevents the screw structure 13 from interfering with the press-fitting working plane.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention shall be defined by the appended claims.

Claims

1. A tooling platform for press-fitting bolts on a rear wheel spindle, characterized in that: The invention comprises a workbench body (1), a press-fit bolt hole structure (2) is provided on the upper surface of the workbench body (1), the press-fit bolt hole structure (2) comprises at least four press-fit bolt holes, which respectively correspond to the positions of the bolts on the rear wheel spindle, a cavity structure (3) is provided at the bottom of the workbench body (1), the press-fit bolt hole structure (2) is connected with the top of the cavity structure (3), a detection switch mounting hole structure (4) and a safety drop-off hole structure (5) are provided around the side of the workbench body (1), the detection switch mounting hole structure (4) is provided on the upper side of the safety drop-off hole structure (5) and is connected with each other in a smooth transition, and the hole diameter of the safety drop-off hole structure (5) is larger than that of the detection switch mounting hole structure (4), the detection switch mounting hole structure (4) and the safety drop-off hole structure (5) are both connected with the side of the cavity structure (3), and the center line of the detection switch mounting hole structure (4) is respectively arranged to be vertically aligned with the center line of the press-fit bolt hole structure (2).

2. The tooling platform for press-fitting bolts on the rear wheel spindle according to claim 1, characterized in that: The press-fit bolt hole structure (2) is composed of four press-fit bolt holes. Four detection switch installation hole structures (4) and four safety drop-off hole structures (5) are arranged around the side of the workbench body (1). Detection switches (6) are installed in each of the four detection switch installation hole structures (4), and all the detection switches (6) are connected in series.

3. The tooling platform for press-fitting bolts on the rear wheel spindle according to claim 2, characterized in that: The detection switch (6) is a normally open flat head proximity switch.

4. The tooling platform for press-fitting bolts on the rear wheel spindle according to claim 2 or 3, characterized in that: The detection switch (6) has an outer shell, and threaded structures are provided at both ends of the outer shell. Nut structures are sleeved on the threaded structures, and the two nut structures are clamped and fixed on the side of the workbench body (1) and the side of the cavity structure (3) respectively.

5. The tooling platform for press-fitting bolts on the rear wheel spindle according to claim 4, characterized in that: The upper side of the cavity structure (3) is an arc-shaped or arched structure.

6. The tooling platform for press-fitting bolts on a rear wheel spindle according to claim 1 or 5, characterized in that: The upper surface of the tooling table body (1) has a boss structure (11), the press-fit bolt hole structure (2) is arranged on the boss structure (11), and screw mounting holes (12) are evenly arranged on the upper surface of the tooling table body (1), the screw mounting holes (12) are arranged around the outer side of the boss structure (11), and a screw structure (13) is installed in the screw mounting holes (12).

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