Crankshaft steel ball pressing equipment

Abstract

The utility model discloses a crankshaft steel ball pressing device which comprises a machine frame, a clamp and a punch, the clamp and the punch are arranged on the machine frame, a crankshaft is fixed to the machine frame under the action of the clamp, the center line of a channel hole in the crankshaft is aligned with the center line of the punch, and the punch moves through a driving mechanism to be used for extruding a steel ball in the channel hole. A pressure sensor is arranged on the punch or the driving mechanism and used for detecting the contact pressure of the punch and the steel ball. On the basis of an existing press-fitting clamp, the pressure sensor is additionally arranged; during use, the crankshaft is fixed through the clamp, then the steel ball is manually placed on a channel hole of the crankshaft, the driving mechanism works to drive the punch to move and extrude the steel ball, the pressure sensor detects the magnitude of the pressurized pressure, and when the steel ball is too large and too small and is not matched with the channel hole, the detected pressures are different. Therefore, whether the steel ball and the crankshaft are most adaptive or not can be judged, and the problem of oil leakage can be avoided while the qualification rate of press fitting of the steel ball on the crankshaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshafts, in particular to a crankshaft steel ball pressing device. Background Art

[0002] When the engine is working, in order to reduce friction resistance, reduce power consumption, reduce wear and extend service life, the crankshaft main journal and crank pin and bearing shell mating surface must be lubricated with lubricating oil. There is also a steel ball outside the connecting rod shaft at one end of the crankshaft to block the crankshaft lubricating oil channel hole.

[0003] In the prior art, when installing steel balls on crankshafts, it is done by manual and mechanical methods. For example, the patent application number is CN201410050649.4, and the name is a patent for a crankshaft steel ball shrinking fixture, which includes a fixture for fixing the crankshaft and a punch for squeezing the steel ball. When in use, the crankshaft is fixed with a fixture, and the hole of the crankshaft where the steel ball needs to be installed and the punch are set for the center line. The steel ball is manually placed in the hole of the crankshaft, and the desktop press is started. The punch moves down to automatically press the steel ball into the hole, completing the installation of the steel ball on the crankshaft.

[0004] In the above patent, the hydraulic mechanism is just a mechanism that simply provides power. In the process of manually pressing the steel ball, there is the problem of whether the size of the steel ball matches the size of the hole. If the steel ball is too large, it may not be pressed into the hole smoothly or affect the stiffness of the crankshaft after pressing; if the steel ball is too small, it may not be able to effectively block the hole, resulting in lubricating oil leakage. However, the existing steel ball pressing equipment cannot detect whether the size of the steel ball matches the crankshaft hole. Therefore, it is necessary to provide a steel ball pressing equipment that can detect whether the steel ball matches the crankshaft hole. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a crankshaft steel ball pressing device, which is combined with a pressure sensor to detect whether the size of the steel ball and the size of the hole are proportional through pressure changes, thereby ensuring the pressing quality of the steel ball on the crankshaft.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a crankshaft steel ball pressing device, including a frame and a clamp and a punch arranged on the frame, the crankshaft is fixed to the frame under the action of the clamp, and the center line of the hole on the crankshaft is aligned with the center line of the punch, the punch is moved by a driving mechanism to squeeze the steel ball in the hole, and a pressure sensor is provided on the punch or the driving mechanism, and the pressure sensor is used to detect the contact pressure between the punch and the steel ball.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] The utility model adds a pressure sensor on the basis of an existing press-fitting fixture. When in use, the crankshaft is fixed by the fixture, and then a steel ball is manually placed on the hole of the crankshaft. The driving mechanism works to drive the punch to move and squeeze the steel ball. The pressure of the pressurized steel ball is detected by the pressure sensor. When the steel ball is too large or too small and does not match the hole, the detected pressure is different. This can be used to determine whether the steel ball and the crankshaft are most suitable. This improves the qualified rate of the crankshaft press-fitted steel ball and can also avoid the problem of oil leakage.

[0009] Furthermore, the punch is telescopically arranged in the vertical direction, the lower end of the punch is used in conjunction with a steel ball, the upper end of the punch is used in conjunction with a driving mechanism, and the pressure sensor is arranged on the driving mechanism.

[0010] Furthermore, a pressure plate is provided on the upper end of the punch, which is connected through the pressure plate and fixed to the frame. A telescopic spring is provided on the punch and is located below the pressure plate. The telescopic spring cooperates with the driving mechanism to drive the punch to move up and down.

[0011] Furthermore, it also includes a positioning structure, which includes a positioning sleeve mounted outside the punch, the positioning sleeve is fixed to the frame and located below the pressure plate, one end of the telescopic spring is fixed to the punch, and the other end is fixed to the positioning sleeve or the pressure plate.

[0012] Furthermore, the driving mechanism includes a hydraulic press and a pressure head connected to the hydraulic press, a pressure sensor is arranged between the pressure head and the hydraulic press, the operation of the hydraulic press drives the pressure sensor and the pressure head to move, and the pressure head contacts the upper end of the punch and drives the punch to move downward to squeeze the steel ball.

[0013] Furthermore, the hydraulic press is fixedly connected to the frame, the telescopic rod and the pressure sensor of the hydraulic press are fixed, and the pressure head and the pressure sensor are fixed on a side away from the telescopic rod.

[0014] Furthermore, the fixture includes a slot, a positioning block and two connecting rod pull-button pressing blocks. The slot is fixed to the frame and adapted to the crankshaft structure. The crankshaft is placed on the positioning block and clamped in the slot so that the hole is adapted to the punch position. The two connecting rod pull-button pressing blocks are used to fix the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a crankshaft that needs to be press-fitted with steel balls according to the utility model;

[0016] Figure 2 It is a structural schematic diagram of the steel ball pressing device and the crankshaft used in combination with each other in the utility model;

[0017] Figure 3 for Figure 2 The structural diagram excluding the crankshaft and the operating table;

[0018] Figure 4 for Figure 3Schematic diagram of the structure from another perspective.

[0019] In the figure: crankshaft 101, gear 102, hole 103, steel ball 104, operating table 1, vertical plate 2, support rod 21, slot 22, block 221, positioning block 23, punch 3, positioning sleeve 4, telescopic spring 5, pressure plate 6, hydraulic press 7, pressure sensor 8, pressure head 9, fixing plate 10, connecting rod buckle pressure block 11. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] like Figure 2 , 3 4, a crankshaft steel ball pressing device includes a frame and a fixture and a punch 3 arranged on the frame. The setting of the frame facilitates the installation of the fixture and the punch 3. For this purpose, the structure of the frame can be an operating table 1 structure, a rectangular frame structure, etc.

[0022] In the present invention, since the steel ball 104 is pressed onto the crankshaft 101 from top to bottom, the crankshaft 101 needs to be fixed vertically, and the hole 103 and the punch 3 on the crankshaft 101 need to be fixed. Figure 1 The structure shown in the figure, the clamp provided in the utility model includes a vertical plate 2, a slot 22 and a positioning block 23 provided on one side of the vertical plate 2, and two connecting rod buckle pressure blocks 11. The vertical plate 2 is a component of the frame, and is fixed on the operating table 1 of the frame at the lower end of the vertical plate 2. The positioning block 23 and the slot 22 are arranged at intervals up and down, and the slot 22 is used to clamp the crankshaft 101 to ensure that the crankshaft 101 is positioned on the vertical plate 2 and can be adapted to the position of the punch 3. Since a gear 102 is fixed on the crankshaft 101, the gear 102 is in contact with the end of the slot 22, which can provide an upward supporting force. For this reason, it is only necessary to ensure that the crankshaft 101 is fixed in the horizontal direction. Therefore, the two connecting rod buckle pressure blocks 11 fix the crankshaft 101 on the vertical plate 2 in the horizontal direction. The two connecting rod buckle pressure blocks 11 are a relatively conventional fixed pressure block structure in the field, and for this reason, they are not described in detail in this embodiment. However, in addition to the mechanical pressing block of this structure, a pressing block structure controlled by a telescopic cylinder can also be used, as long as the pressing block can provide horizontal force to fix the crankshaft 101 on the vertical plate 2.

[0023] like Figure 2 , 3As shown in Figures 4 and 5, the positioning block 23 is used to raise the crankshaft 101 to ensure that the hole 103 of the crankshaft 101 can be set vertically, so as to facilitate the punch 3 to squeeze the steel ball 104. During the process of the punch 3 squeezing the steel ball 104, a support rod 21 is fixed below the slot 22, and the lower end of the support rod 21 is fixed to the operating table 1 to increase the vertical support force of the slot 22. Of course, a block 221 can also be embedded in the slot 22. The block 221 has a groove-shaped structure and is adapted to the crankshaft 101. By replacing the block 221, the device can also be adapted to the press-fitting operation of the steel ball 104 of different crankshafts 101.

[0024] After the clamp fixes the crankshaft 101, the steel ball 104 is manually placed into the hole 103 of the crankshaft 101. It is necessary to control the action of the punch 3 to realize the press-fitting operation. The punch 3 is generally driven by a hydraulic press 7. Since the existing press-fitting equipment cannot achieve the purpose of detecting the size of the steel ball 104, the utility model is improved on the existing basis. Specifically, Figure 2 , 3 As shown in Figures 4 and 5, a pressure sensor 8 is provided on the punch 3 or the driving mechanism, and the pressure sensor 8 is used to detect the contact pressure between the punch 3 and the steel ball 104. The punch 3 moves toward the steel ball 104 on the crankshaft 101 under the action of the driving mechanism (hydraulic machine 7 mechanism) and squeezes the steel ball 104. For this purpose, the punch 3 can be fixedly connected to the driving mechanism, or it can be connected to the driving mechanism in a split manner; it is only necessary to ensure that the movement of the driving mechanism can drive the punch 3 to squeeze the steel ball 104, and the pressure sensor 8 can detect the contact pressure between the punch 3 and the steel ball 104. Correspondingly, the pressure sensor 8 can be fixed to the punch 3 or the driving mechanism, and the squeezing force can be detected during the squeezing of the steel ball 104, so as to achieve the purpose of detecting pressure, and then judge whether the size of the steel ball 104 matches the hole 103 of the crankshaft 101.

[0025] In another embodiment of the present invention, the punch 3 and the driving mechanism are connected in a split manner. Specifically, Figure 2 , 3 As shown in 4, the punch 3 is telescopically arranged in the vertical direction, the lower end of the punch 3 is used in conjunction with the steel ball 104, the upper end of the punch 3 is used in conjunction with the driving mechanism, and the pressure sensor 8 is arranged on the driving mechanism. The split connection method is convenient for the replacement of components, and the up and down telescopic arrangement of the punch 3 is convenient for the punch 3 to be reset after the driving mechanism is separated from the punch 3, which is convenient for the next processing.

[0026] In order to realize the up and down movement of the punch 3, in the present invention, a pressure plate 6 is provided at the upper end of the punch 3, which is fixed to the frame, and a telescopic spring 5 is provided on the punch 3 and located below the pressure plate 6. The telescopic spring 5 cooperates with the driving mechanism to drive the punch 3 to move up and down. Figure 2 , 3As shown in Figures 4 and 5, the pressure plate 6 is arranged horizontally and fixed by two reinforcing rods on the vertical plate 2 to ensure that the pressure plate 6 has sufficient load-bearing capacity, and the upper end of the punch 3 passes through the pressure plate 6, which is convenient for the coordinated use of the driving mechanism and the punch 3. At the same time, due to the existence of the pressure plate 6, the downward movement distance of the punch 3 can also be limited to avoid the press-fitting error caused by the failure of the driving mechanism. The existence of the telescopic spring 5 facilitates the upward movement and reset of the punch 3 after the downward movement, and realizes the telescopic setting of the punch 3 in the vertical direction.

[0027] Theoretically, since the punch 3 penetrates the pressure plate 6, vertical positioning can be achieved through the cooperation between the through hole opened on the pressure plate 6 and the punch 3. In another embodiment of the utility model, in order to further limit the moving direction of the punch 3, as shown in FIG. Figure 2 , 3 As shown in Figures 4 and 5, the utility model further includes a positioning structure, which includes a positioning sleeve 4 sleeved on the outside of the punch 3, the positioning sleeve 4 is fixed to the frame and is located below the pressure plate 6; the positioning sleeve 4 is fixed to the vertical plate 2, and the movement direction of the punch 3 can be limited by the setting of the positioning sleeve 4. Correspondingly, one end of the telescopic spring 5 is fixed to the punch 3, and the other end is fixed to the positioning sleeve 4 or the pressure plate 6. The telescopic spring 5 is arranged between the pressure plate 6 and the positioning sleeve 4, and one end is fixed to the punch 3 at one end, and the other end is fixed to the positioning sleeve 4 or the pressure plate 6, so that the punch 3 can be reset after the external force on the upper end of the punch 3 is eliminated.

[0028] In the present invention, the driving mechanism can be an existing hydraulic press 7 mechanism or a cylinder, which is selected in combination with the pressure required for press fitting. In this embodiment, the driving mechanism adopts a hydraulic press 7 mechanism, specifically, Figure 2 , 3 As shown in , 4, the driving mechanism includes a hydraulic press 7 and a pressure head 9 connected to the hydraulic press 7, a pressure sensor 8 is arranged between the pressure head 9 and the hydraulic press 7, the hydraulic press 7 and the frame are fixedly connected, the telescopic rod of the hydraulic press 7 and the pressure sensor 8 are fixed, and the pressure head 9 and the pressure sensor 8 are fixed on a side away from the telescopic rod; the operation of the hydraulic press 7 drives the pressure sensor 8 and the pressure head 9 to move, and the pressure head 9 contacts the upper end of the punch 3 to drive the punch 3 to move downward to squeeze the steel ball.

[0029] The utility model adds a pressure sensor 8 on the basis of the existing press-fitting fixture. When in use, the crankshaft 101 is fixed by the fixture, and then the steel ball 104 is manually placed on the channel hole 103 of the crankshaft 101. The driving mechanism works to drive the punch 3 to move and squeeze the steel ball 104. The pressure of the pressurized pressure is detected by the pressure sensor 8. When the steel ball 104 is too large or too small and does not match the channel hole 103, the detected pressure is different. In this way, it can be judged whether the steel ball 104 and the crankshaft 101 are most suitable, which improves the qualified rate of the steel ball 104 pressed on the crankshaft 101 and avoids the problem of oil leakage.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A crankshaft steel ball pressing device, comprising a frame and a clamp and a punch (3) arranged on the frame, wherein the crankshaft (101) is fixed to the frame under the action of the clamp, and the center line of the hole (103) on the crankshaft (101) is aligned with the center line of the punch (3), and the punch (3) is moved by a driving mechanism to squeeze the steel ball in the hole (103), characterized in that: The punch (3) or the driving mechanism is provided with a pressure sensor (8), and the pressure sensor (8) is used to detect the contact pressure between the punch (3) and the steel ball.

2. The crankshaft steel ball pressing device according to claim 1, characterized in that: The punch (3) is telescopically arranged in the vertical direction, the lower end of the punch (3) is used in conjunction with a steel ball, the upper end of the punch (3) is used in conjunction with a driving mechanism, and the pressure sensor (8) is arranged on the driving mechanism.

3. A crankshaft steel ball pressing device according to claim 1 or 2, characterized in that: A pressure plate (6) is provided at the upper end of the punch (3) and is connected therethrough. The pressure plate (6) is fixed to the frame. A telescopic spring (5) is sleeved on the punch (3) and is located below the pressure plate (6). The telescopic spring (5) cooperates with a driving mechanism to drive the punch (3) to move up and down.

4. A crankshaft steel ball pressing device according to claim 3, characterized in that: The invention also comprises a positioning structure, which comprises a positioning sleeve (4) sleeved outside the punch (3), the positioning sleeve (4) being fixed to the frame and being located below the pressure plate (6), one end of the telescopic spring (5) being fixed to the punch (3), and the other end being fixed to the positioning sleeve (4) or the pressure plate (6).

5. A crankshaft steel ball pressing device according to claim 1, 2 or 4, characterized in that: The driving mechanism comprises a hydraulic press (7) and a pressure head (9) connected to the hydraulic press (7); a pressure sensor (8) is arranged between the pressure head (9) and the hydraulic press (7); the hydraulic press (7) works to drive the pressure sensor (8) and the pressure head (9) to move; the pressure head (9) contacts the upper end of the punch (3) to drive the punch (3) to move downward to squeeze the steel ball.

6. The crankshaft steel ball pressing device according to claim 3, characterized in that: The driving mechanism comprises a hydraulic press (7) and a pressure head (9) connected to the hydraulic press (7); a pressure sensor (8) is arranged between the pressure head (9) and the hydraulic press (7); the hydraulic press (7) works to drive the pressure sensor (8) and the pressure head (9) to move; the pressure head (9) contacts the upper end of the punch (3) to drive the punch (3) to move downward to squeeze the steel ball.

7. The crankshaft steel ball pressing device according to claim 5, characterized in that: The hydraulic press (7) is fixedly connected to the frame, the telescopic rod of the hydraulic press (7) and the pressure sensor (8) are fixed, and the pressure head (9) and the pressure sensor (8) are fixed on a side away from the telescopic rod.

8. The crankshaft steel ball pressing device according to claim 6, characterized in that: The hydraulic press (7) is fixedly connected to the frame, the telescopic rod of the hydraulic press (7) and the pressure sensor (8) are fixed, and the pressure head (9) and the pressure sensor (8) are fixed on a side away from the telescopic rod.

9. A crankshaft steel ball pressing device according to claim 1, 2, 4, 6, 7 or 8, characterized in that: The clamp comprises a clamping slot (22), a positioning block (23) and two connecting rod buckle pressing blocks (11); the clamping slot (22) is fixed to a frame and is structurally adapted to a crankshaft (101); the crankshaft (101) is placed on the positioning block (23) and clamped in the clamping slot (22) so that the hole (103) and the punch (3) are positioned adapted to each other; the two connecting rod buckle pressing blocks (11) are used to fix the crankshaft (101).

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