CN203442026U - Two-side open-type brake pump device - Google Patents
Two-side open-type brake pump device Download PDFInfo
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- CN203442026U CN203442026U CN201320529596.5U CN201320529596U CN203442026U CN 203442026 U CN203442026 U CN 203442026U CN 201320529596 U CN201320529596 U CN 201320529596U CN 203442026 U CN203442026 U CN 203442026U
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Abstract
The utility model discloses a two-face open-type brake pump device which comprises an air cylinder body, a first piston, a second piston, an adjusting bolt, a spiral brake fluid supply groove, a flat clutch ring and a clutch spring. The two-face open-type brake pump device is characterized by being fixed to a supporting plate through the bolt, the air cylinder body is arranged on the pump device, a first cylinder cavity and a second cylinder cavity are formed in the two sides of the pump device in a rectilinear mode, a partition region exists between the first cylinder cavity and the second cylinder cavity, a fluid chamber is further arranged on the pump device, the first piston is arranged on the pump device, the first piston comprises a piston body and a piston head, a first piston rubber cup installed in the first cylinder cavity is arranged on the outer circumference of the piston body, the second piston is arranged on the pump device, a second piston rubber cup installed in the second cylinder cavity is arranged on the outer circumference of the second piston, an external thread shape is arranged on one side of the adjusting bolt, the spiral brake fluid supply groove covers the outer circumference of a first external thread rod, and an O-shaped ring covers the other side of the adjusting bolt. The two-face open-type brake pump device has the advantages of being good in machining performance and air exhaust efficiency, low in cost and convenient to transport.
Description
Technical field
The utility model relates to the open brake pump device of a kind of common braking equipment, particularly a kind of two sides.
Background technique
Traditional brake pump device comprises that the interim patent of Japan discloses disclosed automatic shoe plate hole reconditioner system in No. 9-229115.This brake pump is by forming with lower component; A piston being slidably mounted in the cylinder thorax that is formed at cylinder block; An adjusting screw, the external thread rod of one side be formed at the internal thread helical toothing in piston, thereby prevent that helical thread portion between the two from rotating under the effect of end thrust, and the clutch surface of opposite side and the first clutch face engagement that is formed at cylinder thorax inside; A clutch ring, the internal thread engagement of one of them axial region is meshed with the second external thread rod that is formed at adjustment bolt opposite side, the sideshake forming between the two can rotate by end thrust two helical thread portions, wherein the engagement of the surface of the second clutch in the clutch surface of outer rim and cylinder thorax; A clutch spring, it impels clutch ring second clutch surface engagement in spring energized direction and described cylinder thorax, and wherein DC system hydrodynamic feed trough forms in the outer rim of adjusting bolt one side.But as a constituent element of above-mentioned brake pump, adjusting bolt has following shortcoming.If brake fluid feed trough is processed by milling machine prior to outside thread, although there is no need to worry the burr that forms on helical thread portion, the line of cut outside thread on external thread rod must be with machine (lathe) processing of another kind of type.Transportation and replacing more time of need of work and manpower, thus the price of adjusting bolt increased.If followed closely after outside thread course of working by milling machine processing brake fluid feed trough, even under very careful processing conditions and machining tool, also may leave burr on screw section.For fear of leaving any burr, preferably outside thread processing is in the first being processed of brake fluid feed trough.Yet, because brake fluid feed trough is that design comes and adjusts bolt straight line parallel on axial direction, originally can become unstable when the rotation of the half-done adjustment bolt that rolls by being applicable to produce on a large scale plastic deformation processing that externally threaded roll squeezer realizes, thereby need larger manufacturing tolerances.Therefore, such processing is inappropriate for adjusting bolt, and it need to keep the deviation of gap bellows.
Model utility content
The purpose of this utility model is to provide a kind of two sides open brake pump device, in order to solve above-mentioned existing issue.
The technical solution of the utility model is as follows: the open brake pump device in a kind of two sides, include cylinder block, first piston, the second piston, adjusting bolt, spirality brake fluid feed trough, flat clutch ring, clutch spring, it is characterized in that: the open brake pump device in two sides is secured by bolts on support plate, on pump-unit, there is a cylinder block, its both sides straight line is formed with cylinder thorax one, cylinder thorax two, between cylinder thorax one and cylinder thorax two, have a subregion, and also have fluid chamber on pump-unit; The open brake pump device in two sides is provided with first piston, and it includes piston body and piston head, is provided with the piston cup one being slidably arranged in cylinder thorax in the periphery of piston body; On the open brake pump device in two sides, be provided with the second piston, in its periphery, be provided with the piston cup two being slidably arranged in cylinder thorax two; Adjust in bolt one side and be formed with outside thread shape, and be formed with the periphery that spirality brake fluid feed trough covers external thread rod one, on the opposite side of adjustment bolt, be coated with 0 shape ring.
On left brake shoe on the open brake pump device in two sides, right braking hoof sheet, have hoof web one, the hoof web two of circular arc to be fixed on the internal surface at shoe plate edge one, shoe plate edge two, liner one, liner two are fixed on the outer circumferential face at shoe plate edge one, shoe plate edge two.
The intermediate portion of hoof web one and hoof web two is supported by shoe plate fixed mechanism one, shoe plate fixed mechanism two movably, the left and right piston of the open brake pump device in each adjacent top and bottom of hoof web one, hoof web two and two sides meshes respectively, has a pair of hoof return spring to be elongated between hoof web one, hoof web two.
The cylinder axis of subregion has through hole to extend around, is formed with the first conical surface and the second conical surface on the internal surface of through hole.
The left side of piston body has gear to assemble with it, between piston body and piston head, by clip, keeps connecting, and dust-proof cover one is installed between piston body and cylinder block.
The right side of piston body axis is drilled with hollow portion one, the left side of piston head is formed with a shoe plate engaging groove one being meshed with hoof web one, the right side of the second piston is formed with between shoe plate engaging groove two, the second pistons that are meshed with hoof web two and cylinder block dust-proof cover is installed.
External thread rod two adjacents on the open brake pump device in two sides have a conical surface, and this conical surface is meshed with the first conical surface of cylinder block.
An axial region adjusting bolt has an admittance pipe one, on the axial region of adjustment bolt opposite side, has an admittance pipe two.
Flat clutch ring has internal thread, itself and the outside thread of corresponding axial region and the conical surface of outer surface is reversible screws togather, and this internal thread and reversible the screwing togather of external thread rod two of adjusting bolt, and conical surface is meshed with the second conical surface in cylinder block.
Adjust between bolt and wheel rim clutch spring is installed, the right side of adjusting the axial region admittance pipe one of bolt is provided with helical spring, and the axial part of positioning work piece can be inserted, and the tip portion of positioning work piece is positioned on the bottom surface of the second piston hollow portion two.
The beneficial effects of the utility model are: have excellent processing characteristics and the usefulness of well bleeding, cost is comparatively cheap, and convenient transportation.
accompanying drawing explanation
Fig. 1 is the stacked plan view of the open brake pump device in two sides;
Fig. 2 is viewgraph of cross-section of the present utility model;
Fig. 3 is the sectional view of the amplification of the automatic shoe plate hole of the utility model reconditioner system;
Fig. 4 is the partial view of Fig. 3;
Fig. 5 is along the cross-sectional view of the pump-unit of figure line V-V intercepting in Fig. 4.
In figure, indicate: 10, support plate, 11, left brake shoe, 111, shoe plate edge one, 112, hoof web one, 113, liner one, 12, right braking hoof sheet, 121, shoe plate edge two, 122, hoof web two, 123, liner two, 13, shoe plate fixed mechanism one, 14, shoe plate fixed mechanism two, 15, hoof return spring, 20, pump-unit, 201, fluid chamber, 21, cylinder topic, 211, cylinder thorax one, 212, cylinder thorax two, 213, subregion, 214, through hole, 215, the first conical surface, 216, the second conical surface, 22, first piston, 23, piston body, 231, hollow portion one, 24, piston head, 241, shoe plate engaging groove one, 25, piston cup one, 26, gear, 27, clip, 28, dust-proof cover one, 32, the second piston, 321, shoe plate engaging groove two, 323, hollow portion two, 35, piston cup two, 38, dust-proof cover two, 40, adjust bolt, 401, external thread rod one, 402, spirality brake fluid feed trough, 403, external thread rod two, 404, conical surface, 405, admittance pipe one, 406, admittance pipe two, 407, wheel rim, 41, o ring, 42, flat clutch ring, 421, conical surface, 43, clutch spring, 44, helical spring, 45, positioning work piece, 451, axial part, 452, tip portion, wherein F is the direction of arrow shown in figure.
preferred embodiment explanation
By reference to the accompanying drawings, the utility model is described in further detail.
As shown in the figure, the open brake pump device in a kind of two sides of the utility model, include cylinder block 21, first piston 22, the second piston 32, adjusting bolt 40, spirality brake fluid feed trough 402, flat clutch ring 42, there is clutch spring 43, it is characterized in that: the open brake pump device 20 in two sides is secured by bolts on support plate 10, on pump-unit 20, there is a cylinder block 21, its both sides straight line is formed with cylinder thorax 1, cylinder thorax 2 212, between cylinder thorax 1 and cylinder thorax 2 212, have a subregion 213, and also have fluid chamber 201 on pump-unit; The open brake pump device 20 in two sides is provided with first piston 22, and it includes piston body 23 and piston head 24, is provided with the piston cup 1 being slidably arranged in cylinder thorax 211 in the periphery of piston body 23; On the open brake pump device 20 in two sides, be provided with the second piston 32, in its periphery, be provided with the piston cup 2 35 being slidably arranged in cylinder thorax 2 212; Adjust in bolt 40 1 sides and be formed with outside thread shape, and be formed with the periphery that spirality brake fluid feed trough 402 covers external thread rod 1, on the opposite side of adjustment bolt 40, be coated with 0 shape ring 41.On left brake shoe 11 on the open brake pump device 20 in two sides, right braking hoof sheet 12, have hoof web 1, the hoof web 2 122 of circular arc to be fixed on the internal surface at shoe plate edge 1, shoe plate edge 2 121, liner 1, liner 2 123 are fixed on the outer circumferential face at shoe plate edge 1, shoe plate edge 2 121.The intermediate portion of hoof web 1 and hoof web 2 122 is supported by shoe plate fixed mechanism 1, shoe plate fixed mechanism 2 14 movably, the left and right piston of the open brake pump device 20 in each adjacent top and bottom of hoof web 1, hoof web 2 122 and two sides meshes respectively, has a pair of hoof return spring 15 to be elongated between hoof web 1, hoof web 2 122.The cylinder axis of subregion 213 has through hole 214 to extend around, is formed with the first conical surface 215 and the second conical surface 216 on the internal surface of through hole 214.The left side of piston body 23 has gear 26 to assemble with it, between piston body 23 and piston head 24, by clip 27, keeps connecting, and between piston body 23 and cylinder block 21, dust-proof cover 1 is installed.The right side of piston body 23 axis is drilled with hollow portion 1, the left side of piston head 24 is formed with a shoe plate engaging groove 1 being meshed with hoof web 1, the right side of the second piston 32 is formed with between shoe plate engaging groove the 2 321, second piston 32 of being meshed with hoof web 2 122 and cylinder block 21 dust-proof cover 38 is installed.External thread rod 2 403 adjacents on the open brake pump device 20 in two sides have a conical surface 404, and this conical surface 404 is meshed with the first conical surface 215 of cylinder block 21.An axial region adjusting bolt 40 has an admittance pipe 1, on the axial region of adjustment bolt 40 opposite sides, has an admittance pipe 2 406.Flat clutch ring 42 has internal thread, itself and the outside thread of corresponding axial region and the conical surface of outer surface 421 is reversible screws togather, and this internal thread and reversible the screwing togather of external thread rod 2 403 of adjusting bolt 40, conical surface 421 is meshed with the second conical surface 216 in cylinder block 21.Adjust between bolt 40 and wheel rim 407 clutch spring 43 is installed, the right side of adjusting the axial region admittance pipe 1 of bolt 40 is provided with helical spring 44, the axial part 451 of positioning work piece 45 can be inserted, and the tip portion of positioning work piece 45 is positioned on the bottom surface of the second piston 32 hollow portions 2 323.
As shown in the figure, overall structure of the present utility model as described above.Fig. 1-5 illustrate one with respect to the pump-unit with two sides side open type brake pump of the utility model example 1.Fig. 1 shows two (D2L) formula roller brake devices of leading, and it has two sides open brake pump device 20(with respect to example 1 of the present utility model hereinafter referred to as hydraulic cylinder device).Wherein, support plate 10 is fixed on static part, on car body.The one open brake pump device 20 in opposite, it is upside and the downside that is fixed on the support plate 10 in Fig. 1, as fixed with bolt respectively.The structure of a pair of left and right brake shoe makes the hoof web of circular arc be fixed to the internal surface at shoe plate edge, so that the T shape of cross section and liner 1, liner 2 123 are fixed to the outer circumferential face at shoe plate edge 1, shoe plate edge 2 121.The intermediate portion of hoof web is supported by shoe plate fixed mechanism movably, aligns with the friction surface of brake drum with the gap of being scheduled in the surface of liner.Each adjacent top and bottom of hoof web 1, hoof web 2 122, with a left side for hydraulic cylinder device, right piston meshes respectively.The structure of the open brake pump device 20 in a pair of two sides in Fig. 1 is almost identical, and the drum brake wherein occurring in Fig. 1 is with respect to its center Rotate 180 degree.The upside of Fig. 1 can describe with reference to Fig. 2.Cylinder thorax 1, cylinder thorax 2 212 straight lines are formed on the both sides of cylinder block 21, have a subregion 213 between two cylinder thoraxes, thereby make cylinder thorax 1 and cylinder thorax 2 212 all have bottom.Brake fluid entrance and exit conduit is bored in a cylinder-bore, and it is positioned at the bottom of cylinder thorax 1, thereby impels air feed and the exhaust of the brake fluid between fluid chamber 201 and brake master cylinder.Around the cylinder axis of subregion 213, through hole 214 extends as shown in Figure 2 from right to left, and progressively widens.The first conical surface 215 and the second conical surface 216 are formed on the internal surface of through hole.
Fig. 2 left side first piston 22 comprises the relative to each other rotatably assembling of piston body 23 and 24, two parts of piston head.Piston cup 1 in piston body 23 peripheries is slidably mounted in a cylinder thorax 1.Gear 26 for manual shoe plate pore adjustment assembles in left side and piston body 23, so that it can relative to each other not rotate.Clip 27 keeps an attachment portion between piston body 23 and piston head 24, thereby in fact that piston body 23 and piston head 24 is integrated, can be dismantled afterwards.Hollow portion 1 is from piston body 23 axis right side borings.In this piston body, have internal thread, itself and one of them corresponding outside thread irreversibly mesh.Outer piston leather cup 2 35 in the second piston 32 peripheries of Fig. 2 right side is slidably mounted in another cylinder thorax 2 212.Shoe plate engaging groove 2 321 is formed on the right side of the second piston 32, and hollow portion 2 323 is holed in left side.The hoof web 122 of right braking hoof sheet 12 is meshed with shoe plate engaging groove 2 321.Assembly below with reference to the automatic shoe plate hole regulating mechanism of Fig. 2-5 explanation.
The first outside thread irreversibly with corresponding internal screw-thread screw.This outside thread is formed on a side (being left side in Fig. 2 and Fig. 3) of adjusting bolt 40, and forms continuously spirality brake fluid feed trough 402 and cover the periphery of external thread rod 1 completely.External thread rod 1 is formed at irreversible the screwing togather of internal thread of piston body 23 hollow portions 1.
O shape ring 41 covers the opposite side (being right side in Fig. 2 and 3) of adjusting bolt 40.The 41 and second piston 32 hollow portion 2 323 Elastic Contact and the assemblings of O shape ring.In addition, the second outside thread reversibly with corresponding internal screw-thread screw.This outside thread is configured in one and adjusts larger-diameter part on bolt 40 opposite sides.The conical surface 404 adjacent with external thread rod 2 403 meshes with the first conical surface 215 of cylinder thorax 21.Admittance pipe 1 be present in another admittance pipe 406 of an axial region of adjusting bolt 40 be present in through adjustment bolt 40 opposite sides of admittance pipe 1 axial region.Flat clutch ring 42 has internal thread, and it reversibly screws togather with the corresponding outside thread of axial region and the conical surface of outer surface 421.Under predetermined axial clearance, this internal thread and reversible the screwing togather of external thread rod 403 of adjusting bolt 40.Be installed under the effect of adjusting the clutch spring 43 between bolt 40 and wheel rim 407 engagement of the second conical surface 216 on conical surface 421 and cylinder body 21.Helical spring 44 is compressed in the pre-position on axial region admittance pipe one 405 right sides of adjustment bolt 40.The axial part 451 of positioning work piece 45 inserts to be applicable to helical spring 44 right sides, and the tip portion 452 of positioning work piece 45 is positioned on the bottom surface of the second piston 32 hollow portions 323.Helical spring 44, the function of positioning work piece 45 and O shape ring 41 is, in brake operation course, when adjusting bolt 40 conical surface 404 clutches engagements and adjust bolt 40 while being subject to vibrating, can prevent blindly motion.Therefore, selecting helical spring 44, positioning work piece 45 and O shape encircle at 41 o'clock, only select necessary parts, and the parts of not selecting the utility model not require.
As shown in Figure 3, spirality brake fluid feed trough 402 is formed at and covers completely continuously the outer circumferential face of the external thread rod 401 of adjusting bolt 40 1 sides.The degree of depth of spirality brake fluid feed trough 402 is greater than the bottom of external thread rod 401, thereby realize brake fluid effectively, supplies with.And the width of spirality brake fluid feed trough 402 is greater than externally threaded width.Spirality brake fluid feed trough 402 Hand of spiral both can be identical with externally threaded Hand of spiral, also can be contrary with it.
The formation of spirality brake fluid feed trough 402 may be by the processing device of locating with being used to form externally threaded identical well-known, as lathe, prior to processing before threading.Therefore spirality brake fluid feed trough 402 can form not having unwanted burr to be created under the condition on outside thread.
For mass production, with rolling mill, spirality brake fluid feed trough 402 is being carried out after plastic deformation processing, the semi-finished product of adjusting bolt 40 will complete automatically on screw thread roller.And it is also to carry out on outside thread that plastic deformation is processed, just as spirality brake fluid feed trough 402.If use this screw thread rolling to process, will further boost productivity.Owing to adjusting the semi-finished product of bolt 40, in the operation of rolling, stablize, the spacing of spirality brake fluid feed trough 402 is preferably larger.Yet when externally threaded rolling processing is carried out in a less spacing, the course of working with the spirality brake fluid feed trough 402 of larger spacing also can be carried out.This has been proved to be than tradition and has utilized lathe technique more can boost productivity.It should be pointed out that for a small amount of production, spirality brake fluid feed trough 402 and outside thread can pass through machined into.
Next with reference to Fig. 1-3 explanation brake operating and shoe plate hole adjusting operation.The shoe plate hole adjusting operation of two open brake pump devices 20 in two sides and the open brake pump device 20 in two sides may be identical, therefore the open brake pump device 20 in one of them two sides will be only described.
In Fig. 1, because two open brake pump devices 20 in two sides are all connected by Brake pipe, in cylinder thorax one 211 bottom sides, brake fluid is supplied to fluid chamber 201, push the upper and lower of left brake shoe 11, right braking hoof sheet 12 abutting ends, with transmissibility to shoe plate return spring 15, thereby make friction engagement between liner 1, liner 2 123 and brake drum (not shown in figure 1).
If brake drum is with the direction rotation of arrow F in Fig. 1, the second piston 32 is just as the function of anchor point.And if brake drum revolves along the opposite direction of arrow F and turns, adjust bolt 40 and just via first piston 22(, wherein only have one and be shown in Fig. 1) as the function of anchor point.Now, no matter the sense of rotation of brake drum is how, two brake shoes unaffected from followup system effect, thus as two, lead first formula breaks (D2L) operation operation.
For the inspection and maintenance braking system of break, preferably the external diameter of brake shoe 11 is manually adjusted.That is to say, if brake drum wearing and tearing and liner one 1c enter into the abrading section of brake drum; If shoe plate hole becomes too small; If large tensioning shoe plate return spring 15, becomes and be difficult to dismounting, the external diameter of left brake shoe 11 must be less.And want to turn back to employer's vehicle, the external diameter of left brake shoe 11 need to expand so that shoe plate hole diminishes, thus the supply that improves brake operating.Therefore,, if while needing manually to adjust, instrument can be inserted from the outside of braking device, with swing pinion 26.Then, adjust the trochoidal surface 404 not engagement revolvably under the strength of shoe plate return spring 15 on bolt 40.Piston head 24 limits its rotation under the effect of hoof web 1.Therefore, the ring gear 26 in fact engaging with piston body 23 can rotate to be back-outed or is screwed into, thereby adjusts as required the external diameter of brake shoe 11.
In Fig. 1, if carry out brake operating during along the direction rotation of arrow F and 113 wearing and tearing of the liner on brake shoe 11 in brake drum (not shown in figure 1), first piston 22 and adjustment bolt 40 irreversibly screw togather, strike between it will surpass the backlash of adjusting between bolt 40 and clutch ring 42, thereby carries out reversible screwing togather with the external thread rod 2 403 of adjusting bolt 40.The frictional force on the periphery trochoidal surface face 421 of clutch ring 42 with a minimizing, the active force of clutch spring 43 causes clutch ring 42 along a corresponding outside thread rotation of adjusting bolt, wherein at the conical surface 421 of clutch ring 42 and the second conical surface 216 of cylinder thorax 21, has an intermediate plate.
Then, if releasing brake device is adjusted bolt 40 and is moved backward under the spring-force driven dual of return spring 15,15 with first piston 22.Now, the backlash that screws togather of adjusting between bolt 40 and clutch ring 42 disappears at the conical surface that nestles up the adjustment bolt 40 of cylinder thorax 21 first conical surfaces 215.Then, due to the engagement of the second conical surface 216 of clutch and cylinder thorax 21, the conical surface 421 of flat clutch ring 42 will stop the rotation.Therefore, adjust bolt 40 and continue rotation, until trochoidal surface 404 and the first conical surface 215 engagements keep a constant shoe plate hole automatically thereby promote first piston 22.If brake drum, along the opposite direction rotation of arrow F, only has the second piston 32 to travel forward after liner 1 and brake drum butt, this impact on automatic shoe plate hole reconditioner system is little.
If gas is included in the open brake pump device 20 in two sides, the increase that the compression of gas can cause operation to be hit, and sponge effect can make that driver feels uncomfortable.Therefore,, while particularly serving in garage, complete and venting service is fast essential.
As shown in Figures 2 and 3, if brake fluid is supplied with fluid chamber's 201 pressurizations in cylinder thorax one 211 bottom sides, brake fluid can become spiral flow, and inwardly flow into along spiral brake fluid feed trough 402, then be injected into piston body 23 and adjust the rear chamber interior surface forming between bolt 40, thereby cause a rotating flow of rear chamber.Therefore, brake fluid is transferred together with air in admittance pipe 1.In addition,, if to brake fluid pressurization, make it start to promote first piston 22 together with adjusting bolt 40, to resist the power of shoe plate return spring 15.Brake fluid is also carried from the gap between the first conical surface 215 of cylinder block 21 and the conical surface 404 of adjustment bolt 40.Therefore, when brake fluid flows through admittance pipe and after 406, its be supplied to admittance pipe 405 axial region brake fluid meet, what now can discharge that delivery channel (not shown) place arranges leads to fluid chamber's 201 bleeders, thereby gets rid of brake fluid and air.This traditional bleeding needs a large amount of operating procedure and very consuming time.Can reduce operating procedure by stirring brake fluid, and the rotational flow by brake fluid can realize effectively and bleeding.In addition, can adjust bolt 40 by strike and promote second piston 32 hollow portion 2 323 another distolateral gases that discharge.
In addition, the open brake pump device 20 in two sides described in Fig. 1 of example 1, the open brake pump device in two sides is positioned at upside and the downside of support plate; But, it should be pointed out that the utility model example is not limited to position by this way.
Due to said structure, brake pump device of the present utility model has the following advantages.The brake fluid feed trough being formed in the external thread rod periphery of adjusting bolt one side is designed to spirality.Therefore, brake fluid feed trough and outside thread can be processed to form by identical processing machine.Correspondingly, need the time of cost and the manufacture cost of adjustment bolt to reduce.This brake fluid feed trough is designed to spirality.Therefore, in the externally threaded operation of rolling, adjust the half-finished periphery of bolt and successfully contact with mould, thus the rotation of having stablized bolt finished product.Correspondingly, when employing is suitable for producing in enormous quantities outside thread roll squeezer, carries out plastic deformation and add man-hour, can not increase screw thread manufacturing tolerances, thereby produce stable shoe plate pore adjustment.Brake fluid feed trough is designed to spirality, and the brake fluid that feed trough is carried forms swirling flow at piston with in adjusting the rear chamber between bolt.Therefore, brake fluid can be stirred, thereby brake fluid and air can be effectively discharged, and the very large improvement validity of bleeding.
It should be noted that, mention in the text " this screwing togather of preventing from rotating under end thrust effect between two helical thread portions can be called as " irreversible screwing togather ", and " this make two helical thread portions rotate under the effect of end thrust screw togather " can be called as " reversibly screwing togather ".
Claims (10)
1. the open brake pump device in two sides, include cylinder block (21), first piston (22), the second piston (32), adjusting bolt (40), spirality brake fluid feed trough (402), flat clutch ring (42), there is clutch spring (43), it is characterized in that:
The open brake pump device in two sides (20) is secured by bolts on support plate (10), on pump-unit, there is a cylinder block (21), its both sides straight line is formed with cylinder thorax one (211), cylinder thorax two (212), between cylinder thorax one (211) and cylinder thorax two (212), have a subregion (213), and also have fluid chamber (201) on pump-unit;
The open brake pump device in two sides (20) is provided with first piston (22), and it includes piston body (23) and piston head (24), is provided with the piston cup one (25) being slidably arranged in cylinder thorax (211) in the periphery of piston body (23);
On the open brake pump device in two sides (20), be provided with the second piston (32), in its periphery, be provided with the piston cup two (35) being slidably arranged in cylinder thorax two (212);
Adjust in bolt (40) one sides and be formed with outside thread shape, and be formed with the periphery that spirality brake fluid feed trough (402) covers external thread rod one (401), on the opposite side of adjustment bolt (40), be coated with 0 shape ring (41).
2. the open brake pump device in two sides according to claim 1, it is characterized in that: on the left brake shoe (11) on the open brake pump device in two sides (20), right braking hoof sheet (12), have hoof web one (112), the hoof web two (122) of circular arc to be fixed on the internal surface at shoe plate edge one (111), shoe plate edge two (121), liner one (113), liner two (123) are fixed on the outer circumferential face at shoe plate edge one (111), shoe plate edge two (121).
3. the open brake pump device in two sides according to claim 2, it is characterized in that: the intermediate portion of hoof web one (112) and hoof web two (122) is supported by shoe plate fixed mechanism one (13), shoe plate fixed mechanism two (14) movably, the left and right piston of the open brake pump device in each adjacent top and bottom of hoof web one (112), hoof web two (122) and two sides (20) meshes respectively, between hoof web one (112), hoof web two (122), has a pair of hoof return spring (15) to be elongated.
4. the open brake pump device in two sides according to claim 1, it is characterized in that: the cylinder axis of subregion (213) has through hole (214) to extend around, is formed with the first conical surface (215) and the second conical surface (216) on the internal surface of through hole (214).
5. the open brake pump device in two sides according to claim 1, it is characterized in that: the left side of piston body (23) has gear (26) to assemble with it, between piston body (23) and piston head (24), by clip (27), keep connecting, between piston body (23) and cylinder block (21), dust-proof cover one (28) is installed.
6. the open brake pump device in two sides according to claim 1, it is characterized in that: the right side of piston body (23) axis is drilled with hollow portion one (231), the left side of piston head (24) is formed with a shoe plate engaging groove one (241) being meshed with hoof web one (112), the right side of the second piston (32) is formed with the shoe plate engaging groove two (321) being meshed with hoof web two (122), between the second piston (32) and cylinder block (21), dust-proof cover (38) is installed.
7. the open brake pump device in two sides according to claim 1, it is characterized in that: external thread rod two (403) adjacents on the open brake pump device in two sides (20) have a conical surface (404), this conical surface (404) is meshed with first conical surface (215) of cylinder block (21).
8. the open brake pump device in two sides according to claim 1, it is characterized in that: (axial region of 400 has an admittance pipe one (405), on the axial region of adjustment bolt (40) opposite side, has an admittance pipe two (406) to adjust bolt.
9. the open brake pump device in two sides according to claim 1, it is characterized in that: flat clutch ring (42) has internal thread, itself and the outside thread of corresponding axial region and reversible the screwing togather of the conical surface of outer surface (421), and this internal thread and external thread rod two (403) reversible the screwing togather of adjusting bolt (40), conical surface (421) is meshed with the second conical surface (216) in cylinder block (21).
10. the open brake pump device in two sides according to claim 1, it is characterized in that: adjust between bolt (40) and wheel rim (407) clutch spring (43) is installed, the right side of adjusting the axial region admittance pipe one (405) of bolt (40) is provided with helical spring (44), the axial part (451) of positioning work piece (45) can be inserted, and the tip portion of positioning work piece (45) is positioned on the bottom surface of the second piston (32) hollow portion two (323).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320529596.5U CN203442026U (en) | 2013-08-29 | 2013-08-29 | Two-side open-type brake pump device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320529596.5U CN203442026U (en) | 2013-08-29 | 2013-08-29 | Two-side open-type brake pump device |
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| Publication Number | Publication Date |
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| CN203442026U true CN203442026U (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320529596.5U Expired - Fee Related CN203442026U (en) | 2013-08-29 | 2013-08-29 | Two-side open-type brake pump device |
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| CN (1) | CN203442026U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050185A (en) * | 2017-12-27 | 2018-05-18 | 朱宗华 | A kind of open slotting drum lining of vehicle brake |
| CN108061113A (en) * | 2017-12-27 | 2018-05-22 | 朱宗华 | A kind of drum brake lining of city for facilitating installation |
| CN109210112A (en) * | 2017-07-07 | 2019-01-15 | 明鸿工业股份有限公司 | Automatic compensation device for free clearance of drum brake and rocker arm end compensation device |
-
2013
- 2013-08-29 CN CN201320529596.5U patent/CN203442026U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210112A (en) * | 2017-07-07 | 2019-01-15 | 明鸿工业股份有限公司 | Automatic compensation device for free clearance of drum brake and rocker arm end compensation device |
| CN109210112B (en) * | 2017-07-07 | 2020-02-18 | 明鸿工业股份有限公司 | Automatic compensation device for free clearance of drum brake and rocker arm end compensation device |
| CN108050185A (en) * | 2017-12-27 | 2018-05-18 | 朱宗华 | A kind of open slotting drum lining of vehicle brake |
| CN108061113A (en) * | 2017-12-27 | 2018-05-22 | 朱宗华 | A kind of drum brake lining of city for facilitating installation |
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