Split type cam shaft and push rod mechanism

Abstract

The utility model discloses a split type cam shaft and a push rod mechanism, and the split type cam shaft comprises a shaft body, at least two positioning assemblies and at least two cam shaft sleeves, the positioning assembly is arranged on the shaft body; the shaft body is sleeved with the cam shaft sleeve, a positioning assembly installation groove is formed in the inner wall of the cam shaft sleeve, and the positioning assembly is inserted into the positioning assembly installation groove. According to the utility model, the camshaft is divided into the shaft body, the at least two positioning assemblies and the at least two camshaft sleeves through the split design, so that the situation that the whole camshaft is scrapped due to unqualified contour processing is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to camshaft technical field, concretely relates to a split type camshaft and push rod mechanism. BACKGROUND

[0002] Camshaft, as an important mechanical component, is arranged in various mechanical equipment.

[0003] The existing camshaft such as the patent name of one-piece camshaft structure with the publication number CN214145605U, including shaft body, gear connecting end, cam, fixed journal and journal oil groove, wherein: gear connecting end is arranged at one end of shaft body;The outer surface of the shaft body is provided with cams of different angles at intervals, and the cams of the same angle are a pair, and the fixed journal is arranged in the middle of the pair of cams, and the outer surface of the fixed journal is annular and uniformly provided with journal oil groove.It should be pointed out that the one-piece camshaft structure has great difficulty in production and processing, and the profile processing is unqualified, which leads to the whole piece being scrapped, thereby causing great loss. SUMMARY

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a split type camshaft and push rod mechanism, aiming at solving the technical problem that the whole camshaft is scrapped due to unqualified profile processing.

[0005] The technical scheme adopted by the utility model to solve the technical problem is as follows:

[0006] Technical scheme one

[0007] A split type camshaft, comprising a shaft body;The split type camshaft further comprises at least two positioning assemblies and at least two camshaft sleeves;The positioning assembly is arranged on the shaft body;The camshaft sleeve is sleeved on the shaft body, the inner wall of the camshaft sleeve is provided with a positioning assembly mounting groove, and the positioning assembly is inserted into the positioning assembly mounting groove.

[0008] As a further improved technical scheme, the positioning assembly comprises a camshaft flat key, and the camshaft flat key is connected with the shaft body.

[0009] As a further improved technical scheme, the positioning assembly further comprises a limiting pin, the camshaft sleeve is provided with a positioning hole, and the limiting pin passes through the positioning hole.

[0010] As a further improved technical scheme, the positioning assembly further comprises a locking piece, and the locking piece is arranged at one end of the limiting pin passing through the positioning hole.

[0011] As a further improved technical scheme, one end of the shaft body is provided with a key groove.

[0012] Technical Solution Two

[0013] A push rod mechanism includes a drive member and a drive member timing pulley, the drive member being connected to the drive member timing pulley; the push rod mechanism further includes a camshaft timing pulley, a timing belt, at least two push rod assemblies, a guide member, at least two plunger rods, and the split camshaft described in technical solution one;

[0014] The camshaft timing pulley is connected to the shaft body;

[0015] The timing belt is sleeved on the camshaft timing pulley and the drive component timing pulley;

[0016] The push rod assembly is located on one side of the shaft body. One end of the push rod assembly is fixedly connected to the camshaft sleeve, and the other end is provided with the plunger rod.

[0017] The guide is located between the two push rod assemblies.

[0018] As a further improved technical solution, the keyway is provided with a camshaft synchronous pulley flat key, and the camshaft synchronous pulley is provided with a first slot that matches the camshaft synchronous pulley flat key. The camshaft synchronous pulley flat key is inserted into the first slot to drive the camshaft synchronous pulley to rotate.

[0019] As a further improved technical solution, the driving component is provided with a driving component synchronous pulley key, and the driving component synchronous pulley is provided with a second slot adapted to the driving component synchronous pulley key. The driving component synchronous pulley key is inserted into the second slot to drive the driving component synchronous pulley to rotate.

[0020] As a further improvement, the guide member is provided with a guide groove to provide guidance for the linear motion of the push rod assembly.

[0021] As a further improved technical solution, the push rod assembly includes a push rod mounting base, a push rod driven bearing, a pin, a push rod guide bearing, and a push rod;

[0022] The push rod mounting base is provided with the push rod driven bearing, which is fixedly connected to the camshaft sleeve. One end of the pin passes through the push rod mounting base and the push rod driven bearing and is connected to the push rod guide bearing. The push rod guide bearing is used to be placed in the guide groove.

[0023] The push rod is provided on one side of the push rod mounting base, and an elastic reset member is sleeved on the push rod. One end of the elastic reset member is connected to the push rod mounting base, and the end of the push rod away from the push rod mounting base is used to connect to the plunger rod.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. By designing the camshaft in sections, consisting of the shaft body, at least two positioning components, and at least two camshaft sleeves, the scrapping of the entire part due to unqualified contour machining is avoided.

[0026] 2. The camshaft sleeve is double-positioned by the camshaft key and the limit pin, and then the locking device fixes the end of the camshaft sleeve that extends out of the camshaft sleeve, which greatly improves the stability of the camshaft sleeve on the shaft. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a split camshaft.

[0028] Figure 2 This is a schematic diagram of the assembly of a split camshaft;

[0029] Figure 3 This is a schematic diagram of the push rod mechanism;

[0030] Figure 4 This is a schematic diagram of the structure of the push rod assembly and the guide component in action;

[0031] Figure 5 This is a schematic diagram of the push rod assembly.

[0032] The numbers in the diagram represent: 1. Shaft body; 101. Keyway; 2. Camshaft key; 3. Limit pin; 4. Camshaft sleeve; 401. Positioning component mounting slot; 5. Locking component; 6. Camshaft timing pulley key; 7. Camshaft timing pulley; 8. Timing belt; 9. Drive component timing pulley key; 10. Drive component timing pulley; 11. Drive component; 12. Push rod assembly; 1201. Push rod mounting seat; 1202. Push rod driven bearing; 1203. Pin; 1204. Push rod guide bearing; 1205. Push rod; 13. Piston rod; 14. Guide component. Detailed Implementation

[0033] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component. Example 1

[0035] like Figure 1 and Figure 2 As shown, where, Figure 1 This is a schematic diagram of a split camshaft. Figure 2 This is a schematic diagram of the assembly of a split camshaft. Specifically, this embodiment provides a split camshaft, including a shaft body 1, two positioning components, and two camshaft sleeves 4. The shaft body 1 is specifically a smooth shaft, and one end of the shaft body 1 is provided with a keyway 101 for mounting a camshaft synchronous pulley key 6. Both positioning components are disposed on the shaft body 1. Both camshaft sleeves 4 are sleeved on the shaft body 1, and the inner wall of the camshaft sleeve 4 is provided with a positioning component mounting groove 401. The positioning component mounting groove 401 is arranged along the length direction of the shaft body 1, and the positioning component is inserted into the positioning component mounting groove 401. The positioning component mounting groove 401 is provided with a positioning hole.

[0036] It should be noted that by splitting the camshaft into the shaft body 1, two positioning components and two camshaft sleeves 4, the situation of scrapping the entire part due to unqualified contour machining is avoided.

[0037] Specifically, the shaft 1 is provided with a first slot for installing the camshaft key 2 and a second slot for installing the limiting pin 3, the first slot and the second slot being arranged at intervals along the length of the shaft 1. The positioning assembly includes the camshaft key 2, the limiting pin 3, and the locking member 5. The camshaft key 2 is installed in the first slot and protrudes from the surface of the shaft 1, the limiting pin 3 is installed in the second slot and protrudes from the surface of the shaft 1, the camshaft key 2 is inserted into the positioning assembly mounting groove 401, the limiting pin 3 passes through the positioning hole, and the locking member 5 is disposed at the end of the limiting pin 3 that passes through the positioning hole.

[0038] It should be noted that the locking element 5 is specifically a fastening screw, which prevents the limiting pin 3 from being squeezed and disengaged from the camshaft sleeve 4 after the limiting pin 3 passes through the positioning hole.

[0039] Specifically, the camshaft sleeve 4 is doubly positioned by the camshaft key 2 and the limiting pin 3, and then the locking member 5 fixes one end of the positioning pin 3 that extends out of the camshaft sleeve 4, which greatly improves the stability of the camshaft sleeve 4 set on the shaft body 1. Example 2

[0040] like Figure 3 As shown, Figure 3This is a schematic diagram of the push rod mechanism. Specifically, this embodiment provides a push rod mechanism, including a drive component 11, a drive component timing pulley 10, a camshaft timing pulley 7, a timing belt 8, two push rod assemblies 12, two plunger rods 13, a guide component 14, and the split camshaft described in Embodiment 1. The drive component 11 is connected to the drive component timing pulley 10. The drive component 11 is specifically a motor; however, it should be understood that other driving devices in the prior art can also be used, depending on actual needs, and are not limited in this embodiment. The camshaft timing pulley 7 is connected to the shaft body 1. The timing belt 8 is sleeved on the camshaft timing pulley 7 and the drive component timing pulley 10. The push rod assembly 12 is disposed on one side of the shaft body 1, with one end fixedly connected to the camshaft sleeve 4 and the other end provided with the plunger rod 13. The guide component 14 is disposed between the two push rod assemblies 12.

[0041] It should be noted that the drive member 11 drives the drive member timing pulley 10 to rotate, which in turn drives the timing belt 8 to circulate on the camshaft timing pulley 7 and the drive member timing pulley 10, thereby driving the camshaft timing pulley 7 to rotate, which in turn drives the shaft 1 to rotate. Under the action of the guide member 14, the push rod assembly 12 is driven to make linear motion, which in turn pushes the plunger rod 13 to make linear motion.

[0042] The keyway 101 is provided with a camshaft timing pulley key 6, and the camshaft timing pulley 7 is provided with a first slot that matches the camshaft timing pulley key 6. The camshaft timing pulley key 6 is inserted into the first slot to drive the camshaft timing pulley 7 to rotate.

[0043] The driving component 11 is provided with a driving component synchronous pulley key 9, and the driving component synchronous pulley 10 is provided with a second slot adapted to the driving component synchronous pulley key 9. The driving component synchronous pulley key 9 is inserted into the second slot to drive the driving component synchronous pulley 10 to rotate.

[0044] like Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of the push rod assembly and the guide member in cooperation. The guide member 14 is provided with a guide groove to guide the linear movement of the push rod assembly 12. It should be noted that by providing one guide member 14 to guide the linear movement of two push rod assemblies 12, the space occupied is greatly reduced, and the structure is also simplified.

[0045] like Figure 5 As shown, Figure 5This is a schematic diagram of the push rod assembly. The push rod assembly 12 includes a push rod mounting base 1201, a push rod driven bearing 1202, a pin 1203, a push rod guide bearing 1204, and a push rod 1205. The push rod driven bearing 1202 is disposed within the push rod mounting base 1201 and is fixedly connected to the camshaft sleeve 4. One end of the pin 1203 passes through the push rod mounting base 1201 and the push rod driven bearing 1202 and connects to the push rod guide bearing 1204. The push rod guide bearing 1204 is placed in the guide groove, which provides guidance for the forward and backward linear movement of the push rod guide bearing 1204. The push rod 1205 is disposed on one side of the push rod mounting base 1201, and an elastic return sleeve is fitted on the push rod 1205. The elastic reset member has one end connected to the push rod mounting base 1201. Specifically, the elastic reset member is a reset spring. However, it should be understood that, depending on actual needs, the elastic reset member can also be other elastic structures found in the prior art. This embodiment does not limit its use. It should be noted that the push rod mechanism is installed inside the housing of the liquid chromatography pump. The push rod 1205 passes through the side wall of the liquid chromatography pump housing. The end of the elastic reset member away from the push rod mounting base 1201 abuts against the housing of the liquid chromatography pump. Relying on the elastic potential energy of the elastic reset member, the push rod assembly 12 can move forward and backward within the housing of the liquid chromatography pump. The end of the push rod 1205 away from the push rod mounting base 1201 is used to connect to the plunger rod 13.

[0046] It should be noted that the push rod mechanism adopts the split camshaft described in Embodiment 1. By splitting the camshaft into the shaft body 1, two positioning components and two camshaft sleeves 4, the scrapping of the entire part due to unqualified contour machining is avoided.

[0047] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

Claims

1. A split camshaft comprising a shaft body (1); characterized in that, The split camshaft further comprises at least two positioning assemblies and at least two camshaft sleeves (4); the positioning assemblies are arranged on the shaft body (1); the camshaft sleeves (4) are arranged on the shaft body (1), and the inner wall of the camshaft sleeve (4) is provided with a positioning assembly mounting groove (401), and the positioning assembly is inserted into the positioning assembly mounting groove (401).

2. The split camshaft of claim 1, wherein, The positioning assembly comprises a camshaft flat key (2) connected with the shaft body (1).

3. The split camshaft of claim 2, wherein, The positioning assembly further comprises a limiting pin (3), and the camshaft sleeve (4) is provided with a positioning hole, and the limiting pin (3) penetrates through the positioning hole.

4. The split camshaft of claim 3, wherein, The positioning assembly further comprises a locking piece (5) arranged at one end of the limiting pin (3) penetrating through the positioning hole.

5. The split camshaft of any one of claims 1-4, wherein, One end of the shaft body (1) is provided with a key groove (101).

6. A push rod mechanism comprising a drive member (11) and a drive member synchronizing pulley (10), the drive member (11) being connected to the drive member synchronizing pulley (10); characterized in that The push rod mechanism further comprises a camshaft synchronous belt pulley (7), a synchronous belt (8), at least two push rod assemblies (12), a guide piece (14), at least two plunger rods (13) and the split camshaft in claim 5; The camshaft synchronous belt pulley (7) is connected with the shaft body (1); The synchronous belt (8) is arranged on the camshaft synchronous belt pulley (7) and the driving piece synchronous belt pulley (10); The push rod assembly (12) is arranged on one side of the shaft body (1), one end of the push rod assembly (12) is fixedly connected with the camshaft sleeve (4), and the other end is provided with a plunger rod (13); The guide piece (14) is arranged between the two push rod assemblies (12).

7. The push rod mechanism of claim 6, wherein, The key groove (101) is provided with a camshaft synchronous belt pulley flat key (6), the camshaft synchronous belt pulley (7) is provided with a first clamping groove matched with the camshaft synchronous belt pulley flat key (6), and the camshaft synchronous belt pulley flat key (6) is inserted into the first clamping groove to drive the camshaft synchronous belt pulley (7) to rotate.

8. The push rod mechanism of claim 6, wherein, The driving piece (11) is provided with a driving piece synchronous belt pulley flat key (9), the driving piece synchronous belt pulley (10) is provided with a second clamping groove matched with the driving piece synchronous belt pulley flat key (9), and the driving piece synchronous belt pulley flat key (9) is inserted into the second clamping groove to drive the driving piece synchronous belt pulley (10) to rotate.

9. The push rod mechanism of claim 6, wherein, The guide piece (14) is provided with a guide groove for providing guidance for the linear motion of the push rod assembly (12).

10. The push rod mechanism of claim 9, wherein, The push rod assembly (12) comprises a push rod mounting seat (1201), a push rod driven bearing (1202), a pin shaft (1203), a push rod guide bearing (1204) and a push rod (1205); The push rod mounting seat (1201) is provided with the push rod driven bearing (1202), the push rod driven bearing (1202) is fixedly connected with the camshaft sleeve (4), one end of the pin shaft (1203) penetrates through the push rod mounting seat (1201) and the push rod driven bearing (1202) and is connected with the push rod guide bearing (1204), and the push rod guide bearing (1204) is arranged in the guide groove. One side of the push rod mounting seat (1201) is provided with the push rod (1205), the push rod (1205) is provided with an elastic reset member, one end of the elastic reset member is connected with the push rod mounting seat (1201), and the end, away from the push rod mounting seat (1201), of the push rod (1205) is used for being connected with the plunger rod (13).

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