Angle positioning mechanism for balance shaft and gear and balance shaft tooth pressing clamp

Abstract

The utility model discloses an angle positioning mechanism for a balance shaft and a gear and a tooth pressing clamp for the balance shaft, and relates to the technical field of shafting assembly, the angle positioning mechanism comprises a support, a gear sleeve, a pressing block and a driving assembly, the support is provided with a groove used for supporting the balance shaft, the gear sleeve is provided with a cavity used for placing the gear, and the pressing block is arranged in the cavity. The gear sleeve is fixedly provided with a gear clamp capable of being inserted into the gear. The end, facing the balance block of the balance shaft, of the pressing block is matched with the balance block, and the driving assembly is connected with the pressing block so that the pressing block can be tightly pressed on the balance block. Angle positioning of the balance shaft and the gear is convenient and fast, and press fitting efficiency of the balance shaft and the gear is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shafting assembly, in particular to an angular positioning mechanism for a balance shaft and a gear, and a balance shaft tooth pressing fixture. Background Art

[0002] When the balance shaft is press-fitted, it is necessary to ensure the mating angle between the shaft and the gear, which requires pre-angular positioning of the shaft and the gear respectively. In the prior art, for gear positioning, it is necessary for workers to manually find the alignment mark in advance and make a mark at the relative position on the other side with a marker pen; then install a gear at the press-fitting position, and when the alignment mark is approximately in the appropriate position, the worker visually aligns it with the gear for positioning. The positioning mark hole of the gear is below the wheel body, which makes it difficult for workers to align and find the mark hole. That is, in the prior art, when press-fitting the balance shaft, there are problems of difficult operation and long operation time in its angular positioning. Summary of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the first object of the utility model is to provide an angular positioning mechanism for a balance shaft and a gear, which makes the angular positioning of the balance shaft and the gear convenient and fast, and improves the press-fitting efficiency of the balance shaft and the gear.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] An angular positioning mechanism for a balance shaft and a gear, comprising: a support, a tooth sleeve, a pressing block and a driving component. A groove for supporting the balance shaft is provided on the support, a cavity for placing the gear is provided in the tooth sleeve, and a tooth card that can be inserted into the gear is fixedly provided on the tooth sleeve; one end of the pressing block facing the balance block of the balance shaft matches the balance block, and the driving component is connected to the pressing block to press the pressing block against the balance block.

[0006] Compared with the prior art, the bracket has the following beneficial effects:

[0007] First, place the gear in the cavity of the tooth sleeve, and insert the tooth card between two adjacent teeth of the gear to prevent the gear from rotating; then place the balance shaft in the groove of the support, and the driving component makes the pressing block move towards the balance block. Since one end of the pressing block facing the balance shaft is designed to match the shape of the end face of the balance block, when the end face of the pressing block fits with the balance block, the balance block is adaptively adjusted to the correct angle and is prevented from rotating randomly. In this way, the angular positioning of the balance shaft and the gear is completed, which is more convenient and fast, and improves the positioning efficiency.

[0008] As a preferred solution, the driving assembly includes a base, a connecting member, a second connecting rod, and a first connecting rod and a tab whose one ends are hinged to the base. The middle part of the second connecting rod is hinged to the free end of the first connecting rod, one end of the second connecting rod is hinged to the free end of the tab, the connecting member can move relative to the tab and be locked, and the connecting member is fixedly connected to the pressing block.

[0009] As a preferred solution, the connecting member includes a screw rod and a first nut. The tab includes a chute formed by two parallel side plates. At least one of the first nuts is arranged at each end of the screw rod passing through the chute.

[0010] As a preferred solution, the gear sleeve is arranged to be rotatable and lockable around its central axis.

[0011] As a preferred solution, it further includes a pad seat assembly. A strip-shaped hole is provided on the gear sleeve, and a fastener passes through the strip-shaped hole and the pad seat assembly.

[0012] As a preferred solution, it further includes a support column coaxially arranged with the balance shaft.

[0013] The second object of the present invention is to propose a balance shaft press-tooth fixture, which makes the angle positioning of the balance shaft and the gear convenient and fast, and improves the effect and efficiency of press-fitting the balance shaft and the gear.

[0014] To achieve the above object, the present invention adopts the following technical solutions:

[0015] A balance shaft press-tooth fixture has an angle positioning mechanism for a balance shaft and a gear as described in any one of the above.

[0016] Compared with the prior art, the balance shaft press-tooth fixture has the following beneficial effects:

[0017] The driving assembly can make the pressing block press on the balance shaft to deflect the balance shaft to a proper angle and limit the continuous rotation of the balance shaft; the tooth card is inserted between two adjacent teeth of the gear to prevent the gear from rotating back. In this way, the angle positioning of the balance shaft and the gear is completed, which is more convenient and fast, and improves the positioning efficiency.

[0018] As a preferred solution, it further includes a base and a connecting plate elastically connected to the base. The connecting plate is fixedly connected to the support, the base, and the support column, and the initial distance between the connecting plate and the base along the axial direction of the balance shaft is adjustable.

[0019] As a preferred solution, it further includes a guide rod fixed on the base and a spring sleeved on the guide rod. The connecting plate is fixedly provided with a lug. One end of the guide rod passes through the lug, and the other end of the guide rod is threadedly connected with a second nut. Both ends of the spring abut against the lug and the second nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a balance shaft in an embodiment;

[0021] Figure 2 It is a schematic structural diagram of a fixture in an embodiment;

[0022] Figure 3 For Figure 2 schematic internal structure diagram;

[0023] Figure 4 For Figure 2 schematic diagram of a vertically arranged structure.

[0024] In the above-mentioned drawings:

[0025] 1. Balance shaft; 2. Journal; 3. Balance weight; 4. Gear; 5. Support; 6. Gear sleeve; 7. Pressure block; 8. Tooth card; 9. Driving assembly; 10. Base; 11. Connecting piece; 12. Second connecting rod; 13. First connecting rod; 14. Connecting tab; 15. Handle; 16. Screw; 17. First nut; 18. Pressure plate; 19. Slot; 20. Pad seat combination; 21. Support column; 22. Connecting plate; 23. Vertical plate; 24. Base plate; 25. Slide rail; 26. Guide rod; 27. Second nut; 28. Pressing head; 29. Spring; 30. Ear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; the structures described in various embodiments can be freely combined without conflict in terms of structure or principle.

[0027] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0029] The following describes some embodiments of the present utility model with reference to the drawings:

[0030] The present utility model provides an angular positioning mechanism for a balance shaft and a gear. For ease of understanding, as Figure 1 shown, taking one of the balance shafts 1 as an example, the balance shaft 1 itself has a journal 2 and a balance weight 3 fixed on the journal 2. The middle of the journal 2 is recessed; the end face of the balance weight 3 is designed as an inverted "V" - shaped structure with a high middle and low sides. During assembly, it is necessary to first position the balance shaft 1 and the gear 4 to the required angle, and then use a pressing device to press one end of the balance shaft 1 into the center hole of the gear 4 to achieve press - fitting assembly. Of course, according to specific requirements, the gear 4 can be replaced with a sprocket, etc.

[0031] As Figure 2 shown, Figure 2 what is shown is a balance - shaft fixture arranged horizontally. The angular positioning mechanism for the balance shaft and the gear includes: a support 5, a tooth sleeve 6, a pressing block 7, and a driving assembly 9;

[0032] The support 5 plays a supporting role for the balance shaft 1. Exemplarily, the support 5 is provided with a groove, and the groove includes a rectangular groove for accommodating the balance weight 3 and two "V" - shaped grooves for supporting the journal 2 of the balance shaft 1. The tooth sleeve 6 is provided with a cavity for placing the gear 4, and a tooth card 8 is welded / fixedly connected to the tooth sleeve 6 through fasteners. The number of tooth cards 8 is not limited. In order to enhance the effect of preventing the gear 4 from rotating, two or more tooth cards 8 can be evenly distributed around the axis of the tooth sleeve 6; the operator axially places the gear 4 into the tooth sleeve 6 along the balance shaft 1. At this time, the tooth card 8 is inserted between two adjacent teeth of the gear 4 to complete the angular positioning of the gear 4.

[0033] The shape of one end of the pressing block 7 facing the balance weight 3 is designed to be parallel to the balance weight 3. The driving assembly 9 is connected to the pressing block 7 and plays a role in driving the pressing block 7 to move towards the balance weight 3 as required and pressing the pressing block 7 against the balance shaft 1. Similarly for the reverse direction, which will not be elaborated here. The driving assembly 9 can be a conventional oil cylinder / cylinder or a lead screw pair, etc.

[0034] During assembly, first place the gear 4 in the cavity along the axis of the cavity, and then insert the gear clip 8 between two adjacent teeth of the gear 4 to prevent the gear 4 from rotating; then place the balancing shaft 1 in the groove of the support 5, and drive the assembly 9 to move the pressure block 7 toward the balancing block 3. Since the end of the pressure block 7 facing the balancing shaft 1 is designed to match the shape of the end face of the balancing block 3, when the end face of the pressure block 7 fits the end face of the balancing block 3, the balancing block 3 is adaptively rotated to the correct angle, and the balancing block 3 cannot rotate at will. In this way, the angular positioning of the balancing shaft 1 and the gear 4 is completed, which is more convenient and quick, and improves the positioning efficiency.

[0035] As a preferred solution, Figure 2 As shown, the driving assembly 9 includes a base 10, a connecting piece 11, a second connecting rod 12, and a first connecting rod 13 and a connecting piece 14, both of which are hinged on the base 10 at one end. In order to facilitate the operation of the second connecting rod 12, a handle 15 is provided at one end of the second connecting rod 12; the other end of the second connecting rod 12 is bent and extended upward and is hinged to the end of the connecting piece 14 away from the base 10, and the middle part (i.e., the bending part) of the second connecting rod 12 is hinged to the free end of the first connecting rod 13. The connecting piece 11 is installed on the connecting piece 14, and the connecting piece 11 is also connected to the pressing block 7. In this way, the operator presses or lifts the second connecting rod 12, and the connecting piece 11 can drive the pressing block 7 to move toward / away from the balancing shaft 1. The driving assembly 9 has a simple structure, low cost and is easy to operate.

[0036] As a preferred solution, Figure 2 As shown, the connecting member 11 is configured to be movable and locked relative to the connecting piece 14. The movement can be along the axial direction and / or radial direction of the balancing shaft 1, and the purpose is to make the positioning of the pressure block 7 and the balancing shaft 1 more accurate. By way of example, taking radial movement adjustment as an example, the connecting member 11 includes a screw rod 16 and a first nut 17, and the connecting piece 14 includes a slide groove surrounded by two parallel side plates, so that the structure of the slide groove is simple and convenient for processing; at least one first nut 17 is provided at each end of the screw rod 16 passing through the slide groove. The pressure block 7 can be fixedly connected / detachably connected to the screw rod 16. By way of example, the pressure block 7 is provided with an internal thread and is threadedly connected to the screw rod 16.

[0037] With such a design, on the one hand, by loosening the first nut 17, the screw rod 16 can slide along the slide groove to a more suitable position, and then tighten the first nut 17, the first nut 17 locks the screw rod 16 at the current position, so that the pressure block 7 can be adjusted relative to the balance shaft 1 along one of the radial directions of the balance shaft 1. On the other hand, by loosening the first nut 17, the screw rod 16 can be moved to a suitable position along its axial direction, and then the first nut 17 can be tightened to complete the locking; thereby changing the spacing between the pressure block 7 and the balance shaft 1 along the axial direction of the screw rod 16, so that the pressure block 7 can more stably press the balance shaft 1, or be suitable for balance shafts 1 of different sizes.

[0038] Furthermore, a pressing sheet 18 is provided between the first nut 17 and the connecting sheet 14 so that the first nut 17 can more stably fix the screw rod 16 at a desired position.

[0039] As a preferred solution, considering the influence of processing errors in practice, the gear sleeve 6 is set to be rotatable around its center line and locked; the purpose is that the operator can fine-tune the angle of the gear 4. For example, one of the implementation methods with simple structure and easy operation is proposed here, which also includes a cushion assembly 20, a strip hole 19 is provided on the gear sleeve 6, and the fastener passes through the strip hole 19 and the cushion assembly 20. When adjusting, loosen the fastener, rotate the gear sleeve 6 to the desired position, and then use the fastener to press the gear sleeve 6 onto the cushion assembly 20.

[0040] As a preferred solution, Figure 3 As shown, it also includes a support column 21 coaxially arranged with the balancing shaft 1. The end of the balancing shaft 1 away from the support column 21 is connected to a pressure head 28 of an external conventional equipment such as a hydraulic press, and the support column 21 plays an axial limiting role on the balancing shaft 1 to prevent the balancing shaft 1 from crushing the gear 4.

[0041] The second object of the utility model is to provide a balance shaft pressing gear fixture, which includes a base and a connecting plate 22, and has any of the above-mentioned balance shaft and gear angle positioning mechanisms. The support 5, the base 10 and the support column 21 are all fixedly mounted on the connecting plate 22.

[0042] The driving assembly 9 presses the pressing block 7 on the balancing shaft 1 to deflect the balancing shaft 1 to a suitable angle and limit the balancing shaft 1 from further rotation; the tooth clip 8 is inserted between two adjacent teeth of the gear 4 to prevent the gear 4 from rotating. In this way, the angular positioning of the balancing shaft 1 and the gear 4 is completed, which is more convenient and quick, and improves the positioning efficiency.

[0043] As a preferred solution, Figure 2 and Figure 3 As shown ( Figure 3 for Figure 2 ), the connecting plate 22 is elastically connected to the base through an elastic member; specifically, the base includes a vertical plate 23 and a bottom plate 24 that are fixedly connected, a slide rail 25 / slide groove extending along the axial direction of the balance shaft 1 is provided on the vertical plate 23, and a slider is fixedly connected to the connecting plate 22, and the slider can slide along the slide rail 25 to achieve a sliding connection between the connecting plate 22 and the base. The cushion assembly 20 is fixed to the bottom plate 24. A guide rod 26 is fixedly provided on the bottom plate 24, and a lug 30 is fixedly provided on the connecting plate 22, one end of the guide rod 26 passes through the lug 30, and the elastic member includes a spring 29, and the two ends of the spring 29 are respectively against the bottom plate 24 and the lug 30.

[0044] The hydraulic press pushes the connecting plate 22 to drive the balancing shaft 1 to move toward the gear 4 until one end of the balancing shaft 1 is pressed into the designed position of the gear 4. At this time, one end of the balancing shaft 1 abuts against the support column 21. After the press-fitting is completed, the pressure head 28 of the hydraulic press retracts, and the spring 29 can drive the connecting plate 22 to move in the opposite direction to return to the position. The pressure head 28 does not need to be connected to the connecting plate 22, which simplifies the structure.

[0045] As a preferred solution, Figure 3 As shown, the initial axial spacing between the connecting plate 22 and the bottom plate 24 along the balancing shaft 1 is designed to be adjustable. For example, one end of the guide rod 26 is threadedly connected with a second nut 27, and the end of the spring 29 that is away from the lug 30 abuts against the second nut 27. By tightening the nut upward, the axial spacing between the connecting plate 22 and the bottom plate 24 along the balancing shaft 1 can be increased through the spring 29, that is, the axial spacing between the support 5 and the gear sleeve 6 along the balancing shaft 1 can be increased, thereby facilitating the removal of the balancing shaft 1 and adapting to balancing shafts 1 of different sizes.

Claims

1. An angle positioning mechanism for a balance shaft and a gear, characterized in that: include: A support (5), a gear sleeve (6), a pressure block (7) and a drive assembly (9), wherein the support (5) is provided with a groove for supporting a balancing shaft (1), the gear sleeve (6) is provided with a cavity for placing a gear (4), and the gear sleeve (6) is fixed with a gear clamp (8) that can be inserted into the gear (4); one end of the pressure block (7) facing the balancing block (3) of the balancing shaft (1) matches the balancing block (3), and the drive assembly (9) is connected to the pressure block (7) to press the pressure block (7) onto the balancing block (3).

2. The angular positioning mechanism of a balance shaft and a gear according to claim 1, characterized in that: The driving assembly (9) comprises a base (10), a connecting piece (11), a second connecting rod (12), a first connecting rod (13) and a connecting piece (14) both of which are hinged at one end to the base (10); the middle part of the second connecting rod (12) is hinged to the free end of the first connecting rod (13); one end of the second connecting rod (12) is hinged to the free end of the connecting piece (14); the connecting piece (11) can be moved and locked relative to the connecting piece (14); and the connecting piece (11) is fixedly connected to the pressing block (7).

3. The angular positioning mechanism of a balance shaft and a gear according to claim 2, characterized in that: The connecting member (11) comprises a screw rod (16) and a first nut (17); the connecting piece (14) comprises a slide groove surrounded by two parallel side plates; at least one first nut (17) is provided at each end of the slide groove through which the screw rod (16) passes.

4. An angle positioning mechanism for a balance shaft and a gear according to any one of claims 1 to 3, characterized in that: The gear sleeve (6) is arranged to be rotatable around its center line and locked.

5. The angular positioning mechanism of a balance shaft and a gear according to claim 4, characterized in that: It also comprises a cushion seat assembly (20), the tooth sleeve (6) is provided with a strip hole (19), and a fastener passes through the strip hole (19) and the cushion seat assembly (20).

6. The angular positioning mechanism of a balance shaft and a gear according to claim 2 or 3, characterized in that: It also includes a support column (21) coaxially arranged with the balancing shaft (1).

7. A balancing shaft pressing gear fixture, characterized in that: The invention provides an angular positioning mechanism of a balancing shaft and a gear according to any one of claims 1 to 6.

8. A balancing shaft pressing gear fixture, characterized in that: A balancing shaft and gear angle positioning mechanism according to claim 6; further comprising a base and a connecting plate (22) elastically connected to the base, wherein the connecting plate (22) is fixedly connected to the support (5), the base (10) and the support column (21), and the initial axial spacing between the connecting plate (22) and the base along the balancing shaft (1) is adjustable.

9. A balancing shaft gear pressing fixture according to claim 8, characterized in that: It also includes a guide rod (26) fixed on the base and a spring (29) sleeved on the guide rod (26); the connecting plate (22) is fixedly provided with a support ear (30); one end of the guide rod (26) passes through the support ear (30); the other end of the guide rod (26) is threadedly connected to a second nut (27); and both ends of the spring (29) abut against the support ear (30) and the second nut (27).

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